embedaddon/pcre/pcre_compile.c - diff

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Diff for /embedaddon/pcre/pcre_compile.c between versions 1.1.1.1 and 1.1.1.5

version 1.1.1.1, 2012/02/21 23:05:51	version 1.1.1.5, 2014/06/15 19:46:03
Line 6	Line 6
and semantics are as close as possible to those of the Perl 5 language.	and semantics are as close as possible to those of the Perl 5 language.

Written by Philip Hazel	Written by Philip Hazel
Copyright (c) 1997-2011 University of Cambridge	Copyright (c) 1997-2013 University of Cambridge

-----------------------------------------------------------------------------	-----------------------------------------------------------------------------
Redistribution and use in source and binary forms, with or without	Redistribution and use in source and binary forms, with or without
Line 53 supporting internal functions that are not used by oth	Line 53 supporting internal functions that are not used by oth
#include "pcre_internal.h"	#include "pcre_internal.h"


/* When PCRE_DEBUG is defined, we need the pcre_printint() function, which is	/* When PCRE_DEBUG is defined, we need the pcre(16\|32)_printint() function, which
also used by pcretest. PCRE_DEBUG is not defined when building a production	is also used by pcretest. PCRE_DEBUG is not defined when building a production
library. */	library. We do not need to select pcre16_printint.c specially, because the
	COMPILE_PCREx macro will already be appropriately set. */

#ifdef PCRE_DEBUG	#ifdef PCRE_DEBUG
#include "pcre_printint.src"	/* pcre_printint.c should not include any headers */
	#define PCRE_INCLUDED
	#include "pcre_printint.c"
	#undef PCRE_INCLUDED
#endif	#endif


/* Macro for setting individual bits in class bitmaps. */	/* Macro for setting individual bits in class bitmaps. */

#define SETBIT(a,b) a[b/8] \|= (1 << (b%8))	#define SETBIT(a,b) a[(b)/8] \|= (1 << ((b)&7))

/* Maximum length value to check against when making sure that the integer that	/* Maximum length value to check against when making sure that the integer that
holds the compiled pattern length does not overflow. We make it a bit less than	holds the compiled pattern length does not overflow. We make it a bit less than
Line 73 to check them every time. */	Line 77 to check them every time. */

#define OFLOW_MAX (INT_MAX - 20)	#define OFLOW_MAX (INT_MAX - 20)

	/* Definitions to allow mutual recursion */

	static int
	add_list_to_class(pcre_uint8 , pcre_uchar , int, compile_data ,
	const pcre_uint32 *, unsigned int);

	static BOOL
	compile_regex(int, pcre_uchar , const pcre_uchar , int *, BOOL, BOOL, int, int,
	pcre_uint32 , pcre_int32 , pcre_uint32 , pcre_int32 , branch_chain *,
	compile_data , int );



/*************************************************	/*************************************************
* Code parameters and static tables *	* Code parameters and static tables *
*************************************************/	*************************************************/
Line 99 kicks in at the same number of forward references in a	Line 115 kicks in at the same number of forward references in a
#define COMPILE_WORK_SIZE (2048*LINK_SIZE)	#define COMPILE_WORK_SIZE (2048*LINK_SIZE)
#define COMPILE_WORK_SIZE_MAX (100*COMPILE_WORK_SIZE)	#define COMPILE_WORK_SIZE_MAX (100*COMPILE_WORK_SIZE)

	/* This value determines the size of the initial vector that is used for
	remembering named groups during the pre-compile. It is allocated on the stack,
	but if it is too small, it is expanded using malloc(), in a similar way to the
	workspace. The value is the number of slots in the list. */

	#define NAMED_GROUP_LIST_SIZE 20

/* The overrun tests check for a slightly smaller size so that they detect the	/* The overrun tests check for a slightly smaller size so that they detect the
overrun before it actually does run off the end of the data block. */	overrun before it actually does run off the end of the data block. */

#define WORK_SIZE_SAFETY_MARGIN (100)	#define WORK_SIZE_SAFETY_MARGIN (100)

	/* Private flags added to firstchar and reqchar. */

	#define REQ_CASELESS (1 << 0) /* Indicates caselessness */
	#define REQ_VARY (1 << 1) /* Reqchar followed non-literal item */
	/* Negative values for the firstchar and reqchar flags */
	#define REQ_UNSET (-2)
	#define REQ_NONE (-1)

	/* Repeated character flags. */

	#define UTF_LENGTH 0x10000000l /* The char contains its length. */

/* Table for handling escaped characters in the range '0'-'z'. Positive returns	/* Table for handling escaped characters in the range '0'-'z'. Positive returns
are simple data values; negative values are for special things like \d and so	are simple data values; negative values are for special things like \d and so
on. Zero means further processing is needed (for things like \x), or the escape	on. Zero means further processing is needed (for things like \x), or the escape
Line 226 static const verbitem verbs[] = {	Line 260 static const verbitem verbs[] = {
static const int verbcount = sizeof(verbs)/sizeof(verbitem);	static const int verbcount = sizeof(verbs)/sizeof(verbitem);


	/* Substitutes for [[:<:]] and [[:>:]], which mean start and end of word in
	another regex library. */

	static const pcre_uchar sub_start_of_word[] = {
	CHAR_BACKSLASH, CHAR_b, CHAR_LEFT_PARENTHESIS, CHAR_QUESTION_MARK,
	CHAR_EQUALS_SIGN, CHAR_BACKSLASH, CHAR_w, CHAR_RIGHT_PARENTHESIS, '\0' };

	static const pcre_uchar sub_end_of_word[] = {
	CHAR_BACKSLASH, CHAR_b, CHAR_LEFT_PARENTHESIS, CHAR_QUESTION_MARK,
	CHAR_LESS_THAN_SIGN, CHAR_EQUALS_SIGN, CHAR_BACKSLASH, CHAR_w,
	CHAR_RIGHT_PARENTHESIS, '\0' };


/* Tables of names of POSIX character classes and their lengths. The names are	/* Tables of names of POSIX character classes and their lengths. The names are
now all in a single string, to reduce the number of relocations when a shared	now all in a single string, to reduce the number of relocations when a shared
library is dynamically loaded. The list of lengths is terminated by a zero	library is dynamically loaded. The list of lengths is terminated by a zero
length entry. The first three must be alpha, lower, upper, as this is assumed	length entry. The first three must be alpha, lower, upper, as this is assumed
for handling case independence. */	for handling case independence. The indices for graph, print, and punct are
	needed, so identify them. */

static const char posix_names[] =	static const char posix_names[] =
STRING_alpha0 STRING_lower0 STRING_upper0 STRING_alnum0	STRING_alpha0 STRING_lower0 STRING_upper0 STRING_alnum0
Line 238 static const char posix_names[] =	Line 286 static const char posix_names[] =
STRING_graph0 STRING_print0 STRING_punct0 STRING_space0	STRING_graph0 STRING_print0 STRING_punct0 STRING_space0
STRING_word0 STRING_xdigit;	STRING_word0 STRING_xdigit;

static const uschar posix_name_lengths[] = {	static const pcre_uint8 posix_name_lengths[] = {
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 6, 0 };	5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 6, 0 };

	#define PC_GRAPH 8
	#define PC_PRINT 9
	#define PC_PUNCT 10


/* Table of class bit maps for each POSIX class. Each class is formed from a	/* Table of class bit maps for each POSIX class. Each class is formed from a
base map, with an optional addition or removal of another map. Then, for some	base map, with an optional addition or removal of another map. Then, for some
classes, there is some additional tweaking: for [:blank:] the vertical space	classes, there is some additional tweaking: for [:blank:] the vertical space
Line 268 static const int posix_class_maps[] = {	Line 321 static const int posix_class_maps[] = {
cbit_xdigit,-1, 0 /* xdigit */	cbit_xdigit,-1, 0 /* xdigit */
};	};

/* Table of substitutes for \d etc when PCRE_UCP is set. The POSIX class	/* Table of substitutes for \d etc when PCRE_UCP is set. They are replaced by
substitutes must be in the order of the names, defined above, and there are	Unicode property escapes. */
both positive and negative cases. NULL means no substitute. */

#ifdef SUPPORT_UCP	#ifdef SUPPORT_UCP
static const uschar *substitutes[] = {	static const pcre_uchar string_PNd[] = {
(uschar )"\\P{Nd}", / \D */	CHAR_BACKSLASH, CHAR_P, CHAR_LEFT_CURLY_BRACKET,
(uschar )"\\p{Nd}", / \d */	CHAR_N, CHAR_d, CHAR_RIGHT_CURLY_BRACKET, '\0' };
(uschar )"\\P{Xsp}", / \S / / NOTE: Xsp is Perl space */	static const pcre_uchar string_pNd[] = {
(uschar )"\\p{Xsp}", / \s */	CHAR_BACKSLASH, CHAR_p, CHAR_LEFT_CURLY_BRACKET,
(uschar )"\\P{Xwd}", / \W */	CHAR_N, CHAR_d, CHAR_RIGHT_CURLY_BRACKET, '\0' };
(uschar )"\\p{Xwd}" / \w */	static const pcre_uchar string_PXsp[] = {
	CHAR_BACKSLASH, CHAR_P, CHAR_LEFT_CURLY_BRACKET,
	CHAR_X, CHAR_s, CHAR_p, CHAR_RIGHT_CURLY_BRACKET, '\0' };
	static const pcre_uchar string_pXsp[] = {
	CHAR_BACKSLASH, CHAR_p, CHAR_LEFT_CURLY_BRACKET,
	CHAR_X, CHAR_s, CHAR_p, CHAR_RIGHT_CURLY_BRACKET, '\0' };
	static const pcre_uchar string_PXwd[] = {
	CHAR_BACKSLASH, CHAR_P, CHAR_LEFT_CURLY_BRACKET,
	CHAR_X, CHAR_w, CHAR_d, CHAR_RIGHT_CURLY_BRACKET, '\0' };
	static const pcre_uchar string_pXwd[] = {
	CHAR_BACKSLASH, CHAR_p, CHAR_LEFT_CURLY_BRACKET,
	CHAR_X, CHAR_w, CHAR_d, CHAR_RIGHT_CURLY_BRACKET, '\0' };

	static const pcre_uchar *substitutes[] = {
	string_PNd, /* \D */
	string_pNd, /* \d */
	string_PXsp, /* \S / / Xsp is Perl space, but from 8.34, Perl */
	string_pXsp, /* \s / / space and POSIX space are the same. */
	string_PXwd, /* \W */
	string_pXwd /* \w */
};	};

static const uschar *posix_substitutes[] = {	/* The POSIX class substitutes must be in the order of the POSIX class names,
(uschar )"\\p{L}", / alpha */	defined above, and there are both positive and negative cases. NULL means no
(uschar )"\\p{Ll}", / lower */	general substitute of a Unicode property escape (\p or \P). However, for some
(uschar )"\\p{Lu}", / upper */	POSIX classes (e.g. graph, print, punct) a special property code is compiled
(uschar )"\\p{Xan}", / alnum */	directly. */
NULL, /* ascii */
(uschar )"\\h", / blank */	static const pcre_uchar string_pL[] = {
NULL, /* cntrl */	CHAR_BACKSLASH, CHAR_p, CHAR_LEFT_CURLY_BRACKET,
(uschar )"\\p{Nd}", / digit */	CHAR_L, CHAR_RIGHT_CURLY_BRACKET, '\0' };
NULL, /* graph */	static const pcre_uchar string_pLl[] = {
NULL, /* print */	CHAR_BACKSLASH, CHAR_p, CHAR_LEFT_CURLY_BRACKET,
NULL, /* punct */	CHAR_L, CHAR_l, CHAR_RIGHT_CURLY_BRACKET, '\0' };
(uschar )"\\p{Xps}", / space / / NOTE: Xps is POSIX space */	static const pcre_uchar string_pLu[] = {
(uschar )"\\p{Xwd}", / word */	CHAR_BACKSLASH, CHAR_p, CHAR_LEFT_CURLY_BRACKET,
NULL, /* xdigit */	CHAR_L, CHAR_u, CHAR_RIGHT_CURLY_BRACKET, '\0' };
	static const pcre_uchar string_pXan[] = {
	CHAR_BACKSLASH, CHAR_p, CHAR_LEFT_CURLY_BRACKET,
	CHAR_X, CHAR_a, CHAR_n, CHAR_RIGHT_CURLY_BRACKET, '\0' };
	static const pcre_uchar string_h[] = {
	CHAR_BACKSLASH, CHAR_h, '\0' };
	static const pcre_uchar string_pXps[] = {
	CHAR_BACKSLASH, CHAR_p, CHAR_LEFT_CURLY_BRACKET,
	CHAR_X, CHAR_p, CHAR_s, CHAR_RIGHT_CURLY_BRACKET, '\0' };
	static const pcre_uchar string_PL[] = {
	CHAR_BACKSLASH, CHAR_P, CHAR_LEFT_CURLY_BRACKET,
	CHAR_L, CHAR_RIGHT_CURLY_BRACKET, '\0' };
	static const pcre_uchar string_PLl[] = {
	CHAR_BACKSLASH, CHAR_P, CHAR_LEFT_CURLY_BRACKET,
	CHAR_L, CHAR_l, CHAR_RIGHT_CURLY_BRACKET, '\0' };
	static const pcre_uchar string_PLu[] = {
	CHAR_BACKSLASH, CHAR_P, CHAR_LEFT_CURLY_BRACKET,
	CHAR_L, CHAR_u, CHAR_RIGHT_CURLY_BRACKET, '\0' };
	static const pcre_uchar string_PXan[] = {
	CHAR_BACKSLASH, CHAR_P, CHAR_LEFT_CURLY_BRACKET,
	CHAR_X, CHAR_a, CHAR_n, CHAR_RIGHT_CURLY_BRACKET, '\0' };
	static const pcre_uchar string_H[] = {
	CHAR_BACKSLASH, CHAR_H, '\0' };
	static const pcre_uchar string_PXps[] = {
	CHAR_BACKSLASH, CHAR_P, CHAR_LEFT_CURLY_BRACKET,
	CHAR_X, CHAR_p, CHAR_s, CHAR_RIGHT_CURLY_BRACKET, '\0' };

	static const pcre_uchar *posix_substitutes[] = {
	string_pL, /* alpha */
	string_pLl, /* lower */
	string_pLu, /* upper */
	string_pXan, /* alnum */
	NULL, /* ascii */
	string_h, /* blank */
	NULL, /* cntrl */
	string_pNd, /* digit */
	NULL, /* graph */
	NULL, /* print */
	NULL, /* punct */
	string_pXps, /* space / / Xps is POSIX space, but from 8.34 */
	string_pXwd, /* word / / Perl and POSIX space are the same */
	NULL, /* xdigit */
/* Negated cases */	/* Negated cases */
(uschar )"\\P{L}", / ^alpha */	string_PL, /* ^alpha */
(uschar )"\\P{Ll}", / ^lower */	string_PLl, /* ^lower */
(uschar )"\\P{Lu}", / ^upper */	string_PLu, /* ^upper */
(uschar )"\\P{Xan}", / ^alnum */	string_PXan, /* ^alnum */
NULL, /* ^ascii */	NULL, /* ^ascii */
(uschar )"\\H", / ^blank */	string_H, /* ^blank */
NULL, /* ^cntrl */	NULL, /* ^cntrl */
(uschar )"\\P{Nd}", / ^digit */	string_PNd, /* ^digit */
NULL, /* ^graph */	NULL, /* ^graph */
NULL, /* ^print */	NULL, /* ^print */
NULL, /* ^punct */	NULL, /* ^punct */
(uschar )"\\P{Xps}", / ^space / / NOTE: Xps is POSIX space */	string_PXps, /* ^space / / Xps is POSIX space, but from 8.34 */
(uschar )"\\P{Xwd}", / ^word */	string_PXwd, /* ^word / / Perl and POSIX space are the same */
NULL /* ^xdigit */	NULL /* ^xdigit */
};	};
#define POSIX_SUBSIZE (sizeof(posix_substitutes)/sizeof(uschar *))	#define POSIX_SUBSIZE (sizeof(posix_substitutes) / sizeof(pcre_uchar *))
#endif	#endif

#define STRING(a) # a	#define STRING(a) # a
Line 372 static const char error_texts[] =	Line 484 static const char error_texts[] =
/* 30 */	/* 30 */
"unknown POSIX class name\0"	"unknown POSIX class name\0"
"POSIX collating elements are not supported\0"	"POSIX collating elements are not supported\0"
"this version of PCRE is not compiled with PCRE_UTF8 support\0"	"this version of PCRE is compiled without UTF support\0"
"spare error\0" / DEAD /	"spare error\0" / DEAD /
"character value in \\x{...} sequence is too large\0"	"character value in \\x{} or \\o{} is too large\0"
/* 35 */	/* 35 */
"invalid condition (?(0)\0"	"invalid condition (?(0)\0"
"\\C not allowed in lookbehind assertion\0"	"\\C not allowed in lookbehind assertion\0"
Line 395 static const char error_texts[] =	Line 507 static const char error_texts[] =
"too many named subpatterns (maximum " XSTRING(MAX_NAME_COUNT) ")\0"	"too many named subpatterns (maximum " XSTRING(MAX_NAME_COUNT) ")\0"
/* 50 */	/* 50 */
"repeated subpattern is too long\0" / DEAD /	"repeated subpattern is too long\0" / DEAD /
"octal value is greater than \\377 (not in UTF-8 mode)\0"	"octal value is greater than \\377 in 8-bit non-UTF-8 mode\0"
"internal error: overran compiling workspace\0"	"internal error: overran compiling workspace\0"
"internal error: previously-checked referenced subpattern not found\0"	"internal error: previously-checked referenced subpattern not found\0"
"DEFINE group contains more than one branch\0"	"DEFINE group contains more than one branch\0"
Line 406 static const char error_texts[] =	Line 518 static const char error_texts[] =
"a numbered reference must not be zero\0"	"a numbered reference must not be zero\0"
"an argument is not allowed for (ACCEPT), (FAIL), or (*COMMIT)\0"	"an argument is not allowed for (ACCEPT), (FAIL), or (*COMMIT)\0"
/* 60 */	/* 60 */
"(*VERB) not recognized\0"	"(*VERB) not recognized or malformed\0"
"number is too big\0"	"number is too big\0"
"subpattern name expected\0"	"subpattern name expected\0"
"digit expected after (?+\0"	"digit expected after (?+\0"
Line 414 static const char error_texts[] =	Line 526 static const char error_texts[] =
/* 65 */	/* 65 */
"different names for subpatterns of the same number are not allowed\0"	"different names for subpatterns of the same number are not allowed\0"
"(*MARK) must have an argument\0"	"(*MARK) must have an argument\0"
"this version of PCRE is not compiled with PCRE_UCP support\0"	"this version of PCRE is not compiled with Unicode property support\0"
"\\c must be followed by an ASCII character\0"	"\\c must be followed by an ASCII character\0"
"\\k is not followed by a braced, angle-bracketed, or quoted name\0"	"\\k is not followed by a braced, angle-bracketed, or quoted name\0"
/* 70 */	/* 70 */
"internal error: unknown opcode in find_fixedlength()\0"	"internal error: unknown opcode in find_fixedlength()\0"
"\\N is not supported in a class\0"	"\\N is not supported in a class\0"
"too many forward references\0"	"too many forward references\0"
	"disallowed Unicode code point (>= 0xd800 && <= 0xdfff)\0"
	"invalid UTF-16 string\0"
	/* 75 */
	"name is too long in (MARK), (PRUNE), (SKIP), or (THEN)\0"
	"character value in \\u.... sequence is too large\0"
	"invalid UTF-32 string\0"
	"setting UTF is disabled by the application\0"
	"non-hex character in \\x{} (closing brace missing?)\0"
	/* 80 */
	"non-octal character in \\o{} (closing brace missing?)\0"
	"missing opening brace after \\o\0"
	"parentheses are too deeply nested\0"
	"invalid range in character class\0"
	"group name must start with a non-digit\0"
;	;

/* Table to identify digits and hex digits. This is used when compiling	/* Table to identify digits and hex digits. This is used when compiling
Line 439 For convenience, we use the same bit definitions as in	Line 565 For convenience, we use the same bit definitions as in

Then we can use ctype_digit and ctype_xdigit in the code. */	Then we can use ctype_digit and ctype_xdigit in the code. */

	/* Using a simple comparison for decimal numbers rather than a memory read
	is much faster, and the resulting code is simpler (the compiler turns it
	into a subtraction and unsigned comparison). */

	#define IS_DIGIT(x) ((x) >= CHAR_0 && (x) <= CHAR_9)

#ifndef EBCDIC	#ifndef EBCDIC

/* This is the "normal" case, for ASCII systems, and EBCDIC systems running in	/* This is the "normal" case, for ASCII systems, and EBCDIC systems running in
UTF-8 mode. */	UTF-8 mode. */

static const unsigned char digitab[] =	static const pcre_uint8 digitab[] =
{	{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 0- 7 */	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 0- 7 */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 8- 15 */	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 8- 15 */
Line 483 static const unsigned char digitab[] =	Line 615 static const unsigned char digitab[] =

/* This is the "abnormal" case, for EBCDIC systems not running in UTF-8 mode. */	/* This is the "abnormal" case, for EBCDIC systems not running in UTF-8 mode. */

static const unsigned char digitab[] =	static const pcre_uint8 digitab[] =
{	{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 0- 7 0 */	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 0- 7 0 */
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 8- 15 */	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 8- 15 */
Line 518 static const unsigned char digitab[] =	Line 650 static const unsigned char digitab[] =
0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c, /* 0 - 7 F0 */	0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c,0x0c, /* 0 - 7 F0 */
0x0c,0x0c,0x00,0x00,0x00,0x00,0x00,0x00};/* 8 -255 */	0x0c,0x0c,0x00,0x00,0x00,0x00,0x00,0x00};/* 8 -255 */

static const unsigned char ebcdic_chartab[] = { /* chartable partial dup */	static const pcre_uint8 ebcdic_chartab[] = { /* chartable partial dup */
0x80,0x00,0x00,0x00,0x00,0x01,0x00,0x00, /* 0- 7 */	0x80,0x00,0x00,0x00,0x00,0x01,0x00,0x00, /* 0- 7 */
0x00,0x00,0x00,0x00,0x01,0x01,0x00,0x00, /* 8- 15 */	0x00,0x00,0x00,0x00,0x01,0x01,0x00,0x00, /* 8- 15 */
0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00, /* 16- 23 */	0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00, /* 16- 23 */
Line 554 static const unsigned char ebcdic_chartab[] = { /* cha	Line 686 static const unsigned char ebcdic_chartab[] = { /* cha
#endif	#endif


/* Definition to allow mutual recursion */	/* This table is used to check whether auto-possessification is possible
	between adjacent character-type opcodes. The left-hand (repeated) opcode is
	used to select the row, and the right-hand opcode is use to select the column.
	A value of 1 means that auto-possessification is OK. For example, the second
	value in the first row means that \D+\d can be turned into \D++\d.

static BOOL	The Unicode property types (\P and \p) have to be present to fill out the table
compile_regex(int, uschar , const uschar , int *, BOOL, BOOL, int, int,	because of what their opcode values are, but the table values should always be
int , int , branch_chain , compile_data , int *);	zero because property types are handled separately in the code. The last four
	columns apply to items that cannot be repeated, so there is no need to have
	rows for them. Note that OP_DIGIT etc. are generated only when PCRE_UCP is
	not set. When it is set, \d etc. are converted into OP_(NOT_)PROP codes. */

	#define APTROWS (LAST_AUTOTAB_LEFT_OP - FIRST_AUTOTAB_OP + 1)
	#define APTCOLS (LAST_AUTOTAB_RIGHT_OP - FIRST_AUTOTAB_OP + 1)

	static const pcre_uint8 autoposstab[APTROWS][APTCOLS] = {
	/* \D \d \S \s \W \w . .+ \C \P \p \R \H \h \V \v \X \Z \z $ $M */
	{ 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, /* \D */
	{ 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1 }, /* \d */
	{ 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1 }, /* \S */
	{ 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, /* \s */
	{ 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, /* \W */
	{ 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1 }, /* \w */
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, /* . */
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, /* .+ */
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 }, /* \C */
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, /* \P */
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, /* \p */
	{ 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0 }, /* \R */
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0 }, /* \H */
	{ 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0 }, /* \h */
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0 }, /* \V */
	{ 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 1, 0, 0 }, /* \v */
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 } /* \X */
	};


	/* This table is used to check whether auto-possessification is possible
	between adjacent Unicode property opcodes (OP_PROP and OP_NOTPROP). The
	left-hand (repeated) opcode is used to select the row, and the right-hand
	opcode is used to select the column. The values are as follows:

	0 Always return FALSE (never auto-possessify)
	1 Character groups are distinct (possessify if both are OP_PROP)
	2 Check character categories in the same group (general or particular)
	3 TRUE if the two opcodes are not the same (PROP vs NOTPROP)

	4 Check left general category vs right particular category
	5 Check right general category vs left particular category

	6 Left alphanum vs right general category
	7 Left space vs right general category
	8 Left word vs right general category

	9 Right alphanum vs left general category
	10 Right space vs left general category
	11 Right word vs left general category

	12 Left alphanum vs right particular category
	13 Left space vs right particular category
	14 Left word vs right particular category

	15 Right alphanum vs left particular category
	16 Right space vs left particular category
	17 Right word vs left particular category
	*/

	static const pcre_uint8 propposstab[PT_TABSIZE][PT_TABSIZE] = {
	/* ANY LAMP GC PC SC ALNUM SPACE PXSPACE WORD CLIST UCNC */
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, /* PT_ANY */
	{ 0, 3, 0, 0, 0, 3, 1, 1, 0, 0, 0 }, /* PT_LAMP */
	{ 0, 0, 2, 4, 0, 9, 10, 10, 11, 0, 0 }, /* PT_GC */
	{ 0, 0, 5, 2, 0, 15, 16, 16, 17, 0, 0 }, /* PT_PC */
	{ 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0 }, /* PT_SC */
	{ 0, 3, 6, 12, 0, 3, 1, 1, 0, 0, 0 }, /* PT_ALNUM */
	{ 0, 1, 7, 13, 0, 1, 3, 3, 1, 0, 0 }, /* PT_SPACE */
	{ 0, 1, 7, 13, 0, 1, 3, 3, 1, 0, 0 }, /* PT_PXSPACE */
	{ 0, 0, 8, 14, 0, 0, 1, 1, 3, 0, 0 }, /* PT_WORD */
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, /* PT_CLIST */
	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3 } /* PT_UCNC */
	};

	/* This table is used to check whether auto-possessification is possible
	between adjacent Unicode property opcodes (OP_PROP and OP_NOTPROP) when one
	specifies a general category and the other specifies a particular category. The
	row is selected by the general category and the column by the particular
	category. The value is 1 if the particular category is not part of the general
	category. */

	static const pcre_uint8 catposstab[7][30] = {
	/* Cc Cf Cn Co Cs Ll Lm Lo Lt Lu Mc Me Mn Nd Nl No Pc Pd Pe Pf Pi Po Ps Sc Sk Sm So Zl Zp Zs */
	{ 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }, /* C */
	{ 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }, /* L */
	{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }, /* M */
	{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }, /* N */
	{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1 }, /* P */
	{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1 }, /* S */
	{ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0 } /* Z */
	};

	/* This table is used when checking ALNUM, (PX)SPACE, SPACE, and WORD against
	a general or particular category. The properties in each row are those
	that apply to the character set in question. Duplication means that a little
	unnecessary work is done when checking, but this keeps things much simpler
	because they can all use the same code. For more details see the comment where
	this table is used.

	Note: SPACE and PXSPACE used to be different because Perl excluded VT from
	"space", but from Perl 5.18 it's included, so both categories are treated the
	same here. */

	static const pcre_uint8 posspropstab[3][4] = {
	{ ucp_L, ucp_N, ucp_N, ucp_Nl }, /* ALNUM, 3rd and 4th values redundant */
	{ ucp_Z, ucp_Z, ucp_C, ucp_Cc }, /* SPACE and PXSPACE, 2nd value redundant */
	{ ucp_L, ucp_N, ucp_P, ucp_Po } /* WORD */
	};

	/* This table is used when converting repeating opcodes into possessified
	versions as a result of an explicit possessive quantifier such as ++. A zero
	value means there is no possessified version - in those cases the item in
	question must be wrapped in ONCE brackets. The table is truncated at OP_CALLOUT
	because all relevant opcodes are less than that. */

	static const pcre_uint8 opcode_possessify[] = {
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0 - 15 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 16 - 31 */

	0, /* NOTI */
	OP_POSSTAR, 0, /* STAR, MINSTAR */
	OP_POSPLUS, 0, /* PLUS, MINPLUS */
	OP_POSQUERY, 0, /* QUERY, MINQUERY */
	OP_POSUPTO, 0, /* UPTO, MINUPTO */
	0, /* EXACT */
	0, 0, 0, 0, /* POS{STAR,PLUS,QUERY,UPTO} */

	OP_POSSTARI, 0, /* STARI, MINSTARI */
	OP_POSPLUSI, 0, /* PLUSI, MINPLUSI */
	OP_POSQUERYI, 0, /* QUERYI, MINQUERYI */
	OP_POSUPTOI, 0, /* UPTOI, MINUPTOI */
	0, /* EXACTI */
	0, 0, 0, 0, /* POS{STARI,PLUSI,QUERYI,UPTOI} */

	OP_NOTPOSSTAR, 0, /* NOTSTAR, NOTMINSTAR */
	OP_NOTPOSPLUS, 0, /* NOTPLUS, NOTMINPLUS */
	OP_NOTPOSQUERY, 0, /* NOTQUERY, NOTMINQUERY */
	OP_NOTPOSUPTO, 0, /* NOTUPTO, NOTMINUPTO */
	0, /* NOTEXACT */
	0, 0, 0, 0, /* NOTPOS{STAR,PLUS,QUERY,UPTO} */

	OP_NOTPOSSTARI, 0, /* NOTSTARI, NOTMINSTARI */
	OP_NOTPOSPLUSI, 0, /* NOTPLUSI, NOTMINPLUSI */
	OP_NOTPOSQUERYI, 0, /* NOTQUERYI, NOTMINQUERYI */
	OP_NOTPOSUPTOI, 0, /* NOTUPTOI, NOTMINUPTOI */
	0, /* NOTEXACTI */
	0, 0, 0, 0, /* NOTPOS{STARI,PLUSI,QUERYI,UPTOI} */

	OP_TYPEPOSSTAR, 0, /* TYPESTAR, TYPEMINSTAR */
	OP_TYPEPOSPLUS, 0, /* TYPEPLUS, TYPEMINPLUS */
	OP_TYPEPOSQUERY, 0, /* TYPEQUERY, TYPEMINQUERY */
	OP_TYPEPOSUPTO, 0, /* TYPEUPTO, TYPEMINUPTO */
	0, /* TYPEEXACT */
	0, 0, 0, 0, /* TYPEPOS{STAR,PLUS,QUERY,UPTO} */

	OP_CRPOSSTAR, 0, /* CRSTAR, CRMINSTAR */
	OP_CRPOSPLUS, 0, /* CRPLUS, CRMINPLUS */
	OP_CRPOSQUERY, 0, /* CRQUERY, CRMINQUERY */
	OP_CRPOSRANGE, 0, /* CRRANGE, CRMINRANGE */
	0, 0, 0, 0, /* CRPOS{STAR,PLUS,QUERY,RANGE} */

	0, 0, 0, /* CLASS, NCLASS, XCLASS */
	0, 0, /* REF, REFI */
	0, 0, /* DNREF, DNREFI */
	0, 0 /* RECURSE, CALLOUT */
	};



/*************************************************	/*************************************************
* Find an error text *	* Find an error text *
*************************************************/	*************************************************/
Line 581 find_error_text(int n)	Line 883 find_error_text(int n)
const char *s = error_texts;	const char *s = error_texts;
for (; n > 0; n--)	for (; n > 0; n--)
{	{
while (*s++ != 0) {};	while (*s++ != CHAR_NULL) {};
if (*s == 0) return "Error text not found (please report)";	if (*s == CHAR_NULL) return "Error text not found (please report)";
}	}
return s;	return s;
}	}



/*************************************************	/*************************************************
* Expand the workspace *	* Expand the workspace *
*************************************************/	*************************************************/
Line 604 Returns: 0 if all went well, else an error number	Line 907 Returns: 0 if all went well, else an error number
static int	static int
expand_workspace(compile_data *cd)	expand_workspace(compile_data *cd)
{	{
uschar *newspace;	pcre_uchar *newspace;
int newsize = cd->workspace_size * 2;	int newsize = cd->workspace_size * 2;

if (newsize > COMPILE_WORK_SIZE_MAX) newsize = COMPILE_WORK_SIZE_MAX;	if (newsize > COMPILE_WORK_SIZE_MAX) newsize = COMPILE_WORK_SIZE_MAX;
Line 612 if (cd->workspace_size >= COMPILE_WORK_SIZE_MAX \|\|	Line 915 if (cd->workspace_size >= COMPILE_WORK_SIZE_MAX \|\|
newsize - cd->workspace_size < WORK_SIZE_SAFETY_MARGIN)	newsize - cd->workspace_size < WORK_SIZE_SAFETY_MARGIN)
return ERR72;	return ERR72;

newspace = (pcre_malloc)(newsize);	newspace = (PUBL(malloc))(IN_UCHARS(newsize));
if (newspace == NULL) return ERR21;	if (newspace == NULL) return ERR21;
	memcpy(newspace, cd->start_workspace, cd->workspace_size * sizeof(pcre_uchar));
memcpy(newspace, cd->start_workspace, cd->workspace_size);	cd->hwm = (pcre_uchar *)newspace + (cd->hwm - cd->start_workspace);
cd->hwm = (uschar *)newspace + (cd->hwm - cd->start_workspace);
if (cd->workspace_size > COMPILE_WORK_SIZE)	if (cd->workspace_size > COMPILE_WORK_SIZE)
(pcre_free)((void *)cd->start_workspace);	(PUBL(free))((void *)cd->start_workspace);
cd->start_workspace = newspace;	cd->start_workspace = newspace;
cd->workspace_size = newsize;	cd->workspace_size = newsize;
return 0;	return 0;
Line 642 Returns: TRUE or FALSE	Line 944 Returns: TRUE or FALSE
*/	*/

static BOOL	static BOOL
is_counted_repeat(const uschar *p)	is_counted_repeat(const pcre_uchar *p)
{	{
if ((digitab[*p++] & ctype_digit) == 0) return FALSE;	if (!IS_DIGIT(*p)) return FALSE;
while ((digitab[*p] & ctype_digit) != 0) p++;	p++;
	while (IS_DIGIT(*p)) p++;
if (*p == CHAR_RIGHT_CURLY_BRACKET) return TRUE;	if (*p == CHAR_RIGHT_CURLY_BRACKET) return TRUE;

if (*p++ != CHAR_COMMA) return FALSE;	if (*p++ != CHAR_COMMA) return FALSE;
if (*p == CHAR_RIGHT_CURLY_BRACKET) return TRUE;	if (*p == CHAR_RIGHT_CURLY_BRACKET) return TRUE;

if ((digitab[*p++] & ctype_digit) == 0) return FALSE;	if (!IS_DIGIT(*p)) return FALSE;
while ((digitab[*p] & ctype_digit) != 0) p++;	p++;
	while (IS_DIGIT(*p)) p++;

return (*p == CHAR_RIGHT_CURLY_BRACKET);	return (*p == CHAR_RIGHT_CURLY_BRACKET);
}	}
Line 664 return (*p == CHAR_RIGHT_CURLY_BRACKET);	Line 968 return (*p == CHAR_RIGHT_CURLY_BRACKET);
*************************************************/	*************************************************/

/* This function is called when a \ has been encountered. It either returns a	/* This function is called when a \ has been encountered. It either returns a
positive value for a simple escape such as \n, or a negative value which	positive value for a simple escape such as \n, or 0 for a data character which
encodes one of the more complicated things such as \d. A backreference to group	will be placed in chptr. A backreference to group n is returned as negative n.
n is returned as -(ESC_REF + n); ESC_REF is the highest ESC_xxx macro. When	When UTF-8 is enabled, a positive value greater than 255 may be returned in
UTF-8 is enabled, a positive value greater than 255 may be returned. On entry,	chptr. On entry, ptr is pointing at the \. On exit, it is on the final
ptr is pointing at the \. On exit, it is on the final character of the escape	character of the escape sequence.
sequence.

Arguments:	Arguments:
ptrptr points to the pattern position pointer	ptrptr points to the pattern position pointer
	chptr points to a returned data character
errorcodeptr points to the errorcode variable	errorcodeptr points to the errorcode variable
bracount number of previous extracting brackets	bracount number of previous extracting brackets
options the options bits	options the options bits
isclass TRUE if inside a character class	isclass TRUE if inside a character class

Returns: zero or positive => a data character	Returns: zero => a data character
negative => a special escape sequence	positive => a special escape sequence
	negative => a back reference
on error, errorcodeptr is set	on error, errorcodeptr is set
*/	*/

static int	static int
check_escape(const uschar *ptrptr, int errorcodeptr, int bracount,	check_escape(const pcre_uchar *ptrptr, pcre_uint32 chptr, int *errorcodeptr,
int options, BOOL isclass)	int bracount, int options, BOOL isclass)
{	{
BOOL utf8 = (options & PCRE_UTF8) != 0;	/* PCRE_UTF16 has the same value as PCRE_UTF8. */
const uschar ptr = ptrptr + 1;	BOOL utf = (options & PCRE_UTF8) != 0;
int c, i;	const pcre_uchar ptr = ptrptr + 1;
	pcre_uint32 c;
	int escape = 0;
	int i;

GETCHARINCTEST(c, ptr); /* Get character value, increment pointer */	GETCHARINCTEST(c, ptr); /* Get character value, increment pointer */
ptr--; /* Set pointer back to the last byte */	ptr--; /* Set pointer back to the last byte */

/* If backslash is at the end of the pattern, it's an error. */	/* If backslash is at the end of the pattern, it's an error. */

if (c == 0) *errorcodeptr = ERR1;	if (c == CHAR_NULL) *errorcodeptr = ERR1;

/* Non-alphanumerics are literals. For digits or letters, do an initial lookup	/* Non-alphanumerics are literals. For digits or letters, do an initial lookup
in a table. A non-zero result is something that can be returned immediately.	in a table. A non-zero result is something that can be returned immediately.
Otherwise further processing may be required. */	Otherwise further processing may be required. */

#ifndef EBCDIC /* ASCII/UTF-8 coding */	#ifndef EBCDIC /* ASCII/UTF-8 coding */
else if (c < CHAR_0 \|\| c > CHAR_z) {} /* Not alphanumeric */	/* Not alphanumeric */
else if ((i = escapes[c - CHAR_0]) != 0) c = i;	else if (c < CHAR_0 \|\| c > CHAR_z) {}
	else if ((i = escapes[c - CHAR_0]) != 0)
	{ if (i > 0) c = (pcre_uint32)i; else escape = -i; }

#else /* EBCDIC coding */	#else /* EBCDIC coding */
else if (c < 'a' \|\| (ebcdic_chartab[c] & 0x0E) == 0) {} /* Not alphanumeric */	/* Not alphanumeric */
else if ((i = escapes[c - 0x48]) != 0) c = i;	else if (c < CHAR_a \|\| (!MAX_255(c) \|\| (ebcdic_chartab[c] & 0x0E) == 0)) {}
	else if ((i = escapes[c - 0x48]) != 0) { if (i > 0) c = (pcre_uint32)i; else escape = -i; }
#endif	#endif

/* Escapes that need further processing, or are illegal. */	/* Escapes that need further processing, or are illegal. */

else	else
{	{
const uschar *oldptr;	const pcre_uchar *oldptr;
BOOL braced, negated;	BOOL braced, negated, overflow;
	int s;

switch (c)	switch (c)
{	{
Line 733 else	Line 1045 else
{	{
/* In JavaScript, \u must be followed by four hexadecimal numbers.	/* In JavaScript, \u must be followed by four hexadecimal numbers.
Otherwise it is a lowercase u letter. */	Otherwise it is a lowercase u letter. */
if ((digitab[ptr[1]] & ctype_xdigit) != 0 && (digitab[ptr[2]] & ctype_xdigit) != 0	if (MAX_255(ptr[1]) && (digitab[ptr[1]] & ctype_xdigit) != 0
&& (digitab[ptr[3]] & ctype_xdigit) != 0 && (digitab[ptr[4]] & ctype_xdigit) != 0)	&& MAX_255(ptr[2]) && (digitab[ptr[2]] & ctype_xdigit) != 0
	&& MAX_255(ptr[3]) && (digitab[ptr[3]] & ctype_xdigit) != 0
	&& MAX_255(ptr[4]) && (digitab[ptr[4]] & ctype_xdigit) != 0)
{	{
c = 0;	c = 0;
for (i = 0; i < 4; ++i)	for (i = 0; i < 4; ++i)
{	{
register int cc = *(++ptr);	register pcre_uint32 cc = *(++ptr);
#ifndef EBCDIC /* ASCII/UTF-8 coding */	#ifndef EBCDIC /* ASCII/UTF-8 coding */
if (cc >= CHAR_a) cc -= 32; /* Convert to upper case */	if (cc >= CHAR_a) cc -= 32; /* Convert to upper case */
c = (c << 4) + cc - ((cc < CHAR_A)? CHAR_0 : (CHAR_A - 10));	c = (c << 4) + cc - ((cc < CHAR_A)? CHAR_0 : (CHAR_A - 10));
Line 748 else	Line 1062 else
c = (c << 4) + cc - ((cc >= CHAR_0)? CHAR_0 : (CHAR_A - 10));	c = (c << 4) + cc - ((cc >= CHAR_0)? CHAR_0 : (CHAR_A - 10));
#endif	#endif
}	}

	#if defined COMPILE_PCRE8
	if (c > (utf ? 0x10ffffU : 0xffU))
	#elif defined COMPILE_PCRE16
	if (c > (utf ? 0x10ffffU : 0xffffU))
	#elif defined COMPILE_PCRE32
	if (utf && c > 0x10ffffU)
	#endif
	{
	*errorcodeptr = ERR76;
	}
	else if (utf && c >= 0xd800 && c <= 0xdfff) *errorcodeptr = ERR73;
}	}
}	}
else	else
Line 774 else	Line 1100 else
(3) For Oniguruma compatibility we also support \g followed by a name or a	(3) For Oniguruma compatibility we also support \g followed by a name or a
number either in angle brackets or in single quotes. However, these are	number either in angle brackets or in single quotes. However, these are
(possibly recursive) subroutine calls, _not_ backreferences. Just return	(possibly recursive) subroutine calls, _not_ backreferences. Just return
the -ESC_g code (cf \k). */	the ESC_g code (cf \k). */

case CHAR_g:	case CHAR_g:
if (isclass) break;	if (isclass) break;
if (ptr[1] == CHAR_LESS_THAN_SIGN \|\| ptr[1] == CHAR_APOSTROPHE)	if (ptr[1] == CHAR_LESS_THAN_SIGN \|\| ptr[1] == CHAR_APOSTROPHE)
{	{
c = -ESC_g;	escape = ESC_g;
break;	break;
}	}

Line 788 else	Line 1114 else

if (ptr[1] == CHAR_LEFT_CURLY_BRACKET)	if (ptr[1] == CHAR_LEFT_CURLY_BRACKET)
{	{
const uschar *p;	const pcre_uchar *p;
for (p = ptr+2; p != 0 && p != CHAR_RIGHT_CURLY_BRACKET; p++)	for (p = ptr+2; p != CHAR_NULL && p != CHAR_RIGHT_CURLY_BRACKET; p++)
if (p != CHAR_MINUS && (digitab[p] & ctype_digit) == 0) break;	if (p != CHAR_MINUS && !IS_DIGIT(p)) break;
if (p != 0 && p != CHAR_RIGHT_CURLY_BRACKET)	if (p != CHAR_NULL && p != CHAR_RIGHT_CURLY_BRACKET)
{	{
c = -ESC_k;	escape = ESC_k;
break;	break;
}	}
braced = TRUE;	braced = TRUE;
Line 808 else	Line 1134 else
}	}
else negated = FALSE;	else negated = FALSE;

c = 0;	/* The integer range is limited by the machine's int representation. */
while ((digitab[ptr[1]] & ctype_digit) != 0)	s = 0;
c = c * 10 + *(++ptr) - CHAR_0;	overflow = FALSE;
	while (IS_DIGIT(ptr[1]))
if (c < 0) /* Integer overflow */
{	{
	if (s > INT_MAX / 10 - 1) /* Integer overflow */
	{
	overflow = TRUE;
	break;
	}
	s = s * 10 + (int)(*(++ptr) - CHAR_0);
	}
	if (overflow) /* Integer overflow */
	{
	while (IS_DIGIT(ptr[1]))
	ptr++;
*errorcodeptr = ERR61;	*errorcodeptr = ERR61;
break;	break;
}	}
Line 824 else	Line 1160 else
break;	break;
}	}

if (c == 0)	if (s == 0)
{	{
*errorcodeptr = ERR58;	*errorcodeptr = ERR58;
break;	break;
Line 832 else	Line 1168 else

if (negated)	if (negated)
{	{
if (c > bracount)	if (s > bracount)
{	{
*errorcodeptr = ERR15;	*errorcodeptr = ERR15;
break;	break;
}	}
c = bracount - (c - 1);	s = bracount - (s - 1);
}	}

c = -(ESC_REF + c);	escape = -s;
break;	break;

/* The handling of escape sequences consisting of a string of digits	/* The handling of escape sequences consisting of a string of digits
starting with one that is not zero is not straightforward. By experiment,	starting with one that is not zero is not straightforward. Perl has changed
the way Perl works seems to be as follows:	over the years. Nowadays \g{} for backreferences and \o{} for octal are
	recommended to avoid the ambiguities in the old syntax.

Outside a character class, the digits are read as a decimal number. If the	Outside a character class, the digits are read as a decimal number. If the
number is less than 10, or if there are that many previous extracting	number is less than 8 (used to be 10), or if there are that many previous
left brackets, then it is a back reference. Otherwise, up to three octal	extracting left brackets, then it is a back reference. Otherwise, up to
digits are read to form an escaped byte. Thus \123 is likely to be octal	three octal digits are read to form an escaped byte. Thus \123 is likely to
123 (cf \0123, which is octal 012 followed by the literal 3). If the octal	be octal 123 (cf \0123, which is octal 012 followed by the literal 3). If
value is greater than 377, the least significant 8 bits are taken. Inside a	the octal value is greater than 377, the least significant 8 bits are
character class, \ followed by a digit is always an octal number. */	taken. \8 and \9 are treated as the literal characters 8 and 9.

	Inside a character class, \ followed by a digit is always either a literal
	8 or 9 or an octal number. */

case CHAR_1: case CHAR_2: case CHAR_3: case CHAR_4: case CHAR_5:	case CHAR_1: case CHAR_2: case CHAR_3: case CHAR_4: case CHAR_5:
case CHAR_6: case CHAR_7: case CHAR_8: case CHAR_9:	case CHAR_6: case CHAR_7: case CHAR_8: case CHAR_9:

if (!isclass)	if (!isclass)
{	{
oldptr = ptr;	oldptr = ptr;
c -= CHAR_0;	/* The integer range is limited by the machine's int representation. */
while ((digitab[ptr[1]] & ctype_digit) != 0)	s = (int)(c -CHAR_0);
c = c * 10 + *(++ptr) - CHAR_0;	overflow = FALSE;
if (c < 0) /* Integer overflow */	while (IS_DIGIT(ptr[1]))
{	{
	if (s > INT_MAX / 10 - 1) /* Integer overflow */
	{
	overflow = TRUE;
	break;
	}
	s = s * 10 + (int)(*(++ptr) - CHAR_0);
	}
	if (overflow) /* Integer overflow */
	{
	while (IS_DIGIT(ptr[1]))
	ptr++;
*errorcodeptr = ERR61;	*errorcodeptr = ERR61;
break;	break;
}	}
if (c < 10 \|\| c <= bracount)	if (s < 8 \|\| s <= bracount) /* Check for back reference */
{	{
c = -(ESC_REF + c);	escape = -s;
break;	break;
}	}
ptr = oldptr; /* Put the pointer back and fall through */	ptr = oldptr; /* Put the pointer back and fall through */
}	}

/* Handle an octal number following \. If the first digit is 8 or 9, Perl	/* Handle a digit following \ when the number is not a back reference. If
generates a binary zero byte and treats the digit as a following literal.	the first digit is 8 or 9, Perl used to generate a binary zero byte and
Thus we have to pull back the pointer by one. */	then treat the digit as a following literal. At least by Perl 5.18 this
	changed so as not to insert the binary zero. */

if ((c = *ptr) >= CHAR_8)	if ((c = *ptr) >= CHAR_8) break;
{
ptr--;
c = 0;
break;
}

	/* Fall through with a digit less than 8 */

/* \0 always starts an octal number, but we may drop through to here with a	/* \0 always starts an octal number, but we may drop through to here with a
larger first octal digit. The original code used just to take the least	larger first octal digit. The original code used just to take the least
significant 8 bits of octal numbers (I think this is what early Perls used	significant 8 bits of octal numbers (I think this is what early Perls used
to do). Nowadays we allow for larger numbers in UTF-8 mode, but no more	to do). Nowadays we allow for larger numbers in UTF-8 mode and 16-bit mode,
than 3 octal digits. */	but no more than 3 octal digits. */

case CHAR_0:	case CHAR_0:
c -= CHAR_0;	c -= CHAR_0;
while(i++ < 2 && ptr[1] >= CHAR_0 && ptr[1] <= CHAR_7)	while(i++ < 2 && ptr[1] >= CHAR_0 && ptr[1] <= CHAR_7)
c = c * 8 + *(++ptr) - CHAR_0;	c = c * 8 + *(++ptr) - CHAR_0;
if (!utf8 && c > 255) *errorcodeptr = ERR51;	#ifdef COMPILE_PCRE8
	if (!utf && c > 0xff) *errorcodeptr = ERR51;
	#endif
break;	break;

/* \x is complicated. \x{ddd} is a character number which can be greater	/* \o is a relatively new Perl feature, supporting a more general way of
than 0xff in utf8 mode, but only if the ddd are hex digits. If not, { is	specifying character codes in octal. The only supported form is \o{ddd}. */
treated as a data character. */

	case CHAR_o:
	if (ptr[1] != CHAR_LEFT_CURLY_BRACKET) *errorcodeptr = ERR81; else
	{
	ptr += 2;
	c = 0;
	overflow = FALSE;
	while (ptr >= CHAR_0 && ptr <= CHAR_7)
	{
	register pcre_uint32 cc = *ptr++;
	if (c == 0 && cc == CHAR_0) continue; /* Leading zeroes */
	#ifdef COMPILE_PCRE32
	if (c >= 0x20000000l) { overflow = TRUE; break; }
	#endif
	c = (c << 3) + cc - CHAR_0 ;
	#if defined COMPILE_PCRE8
	if (c > (utf ? 0x10ffffU : 0xffU)) { overflow = TRUE; break; }
	#elif defined COMPILE_PCRE16
	if (c > (utf ? 0x10ffffU : 0xffffU)) { overflow = TRUE; break; }
	#elif defined COMPILE_PCRE32
	if (utf && c > 0x10ffffU) { overflow = TRUE; break; }
	#endif
	}
	if (overflow)
	{
	while (ptr >= CHAR_0 && ptr <= CHAR_7) ptr++;
	*errorcodeptr = ERR34;
	}
	else if (*ptr == CHAR_RIGHT_CURLY_BRACKET)
	{
	if (utf && c >= 0xd800 && c <= 0xdfff) *errorcodeptr = ERR73;
	}
	else *errorcodeptr = ERR80;
	}
	break;

	/* \x is complicated. In JavaScript, \x must be followed by two hexadecimal
	numbers. Otherwise it is a lowercase x letter. */

case CHAR_x:	case CHAR_x:
if ((options & PCRE_JAVASCRIPT_COMPAT) != 0)	if ((options & PCRE_JAVASCRIPT_COMPAT) != 0)
{	{
/* In JavaScript, \x must be followed by two hexadecimal numbers.	if (MAX_255(ptr[1]) && (digitab[ptr[1]] & ctype_xdigit) != 0
Otherwise it is a lowercase x letter. */	&& MAX_255(ptr[2]) && (digitab[ptr[2]] & ctype_xdigit) != 0)
if ((digitab[ptr[1]] & ctype_xdigit) != 0 && (digitab[ptr[2]] & ctype_xdigit) != 0)
{	{
c = 0;	c = 0;
for (i = 0; i < 2; ++i)	for (i = 0; i < 2; ++i)
{	{
register int cc = *(++ptr);	register pcre_uint32 cc = *(++ptr);
#ifndef EBCDIC /* ASCII/UTF-8 coding */	#ifndef EBCDIC /* ASCII/UTF-8 coding */
if (cc >= CHAR_a) cc -= 32; /* Convert to upper case */	if (cc >= CHAR_a) cc -= 32; /* Convert to upper case */
c = (c << 4) + cc - ((cc < CHAR_A)? CHAR_0 : (CHAR_A - 10));	c = (c << 4) + cc - ((cc < CHAR_A)? CHAR_0 : (CHAR_A - 10));
Line 925 else	Line 1312 else
#endif	#endif
}	}
}	}
break;	} /* End JavaScript handling */
}

if (ptr[1] == CHAR_LEFT_CURLY_BRACKET)	/* Handle \x in Perl's style. \x{ddd} is a character number which can be
{	greater than 0xff in utf or non-8bit mode, but only if the ddd are hex
const uschar *pt = ptr + 2;	digits. If not, { used to be treated as a data character. However, Perl
int count = 0;	seems to read hex digits up to the first non-such, and ignore the rest, so
	that, for example \x{zz} matches a binary zero. This seems crazy, so PCRE
	now gives an error. */

c = 0;	else
while ((digitab[*pt] & ctype_xdigit) != 0)	{
	if (ptr[1] == CHAR_LEFT_CURLY_BRACKET)
{	{
register int cc = *pt++;	ptr += 2;
if (c == 0 && cc == CHAR_0) continue; /* Leading zeroes */	c = 0;
count++;	overflow = FALSE;
	while (MAX_255(ptr) && (digitab[ptr] & ctype_xdigit) != 0)
	{
	register pcre_uint32 cc = *ptr++;
	if (c == 0 && cc == CHAR_0) continue; /* Leading zeroes */

	#ifdef COMPILE_PCRE32
	if (c >= 0x10000000l) { overflow = TRUE; break; }
	#endif

#ifndef EBCDIC /* ASCII/UTF-8 coding */	#ifndef EBCDIC /* ASCII/UTF-8 coding */
if (cc >= CHAR_a) cc -= 32; /* Convert to upper case */	if (cc >= CHAR_a) cc -= 32; /* Convert to upper case */
c = (c << 4) + cc - ((cc < CHAR_A)? CHAR_0 : (CHAR_A - 10));	c = (c << 4) + cc - ((cc < CHAR_A)? CHAR_0 : (CHAR_A - 10));
#else /* EBCDIC coding */	#else /* EBCDIC coding */
if (cc >= CHAR_a && cc <= CHAR_z) cc += 64; /* Convert to upper case */	if (cc >= CHAR_a && cc <= CHAR_z) cc += 64; /* Convert to upper case */
c = (c << 4) + cc - ((cc >= CHAR_0)? CHAR_0 : (CHAR_A - 10));	c = (c << 4) + cc - ((cc >= CHAR_0)? CHAR_0 : (CHAR_A - 10));
#endif	#endif
}

if (*pt == CHAR_RIGHT_CURLY_BRACKET)	#if defined COMPILE_PCRE8
{	if (c > (utf ? 0x10ffffU : 0xffU)) { overflow = TRUE; break; }
if (c < 0 \|\| count > (utf8? 8 : 2)) *errorcodeptr = ERR34;	#elif defined COMPILE_PCRE16
ptr = pt;	if (c > (utf ? 0x10ffffU : 0xffffU)) { overflow = TRUE; break; }
break;	#elif defined COMPILE_PCRE32
}	if (utf && c > 0x10ffffU) { overflow = TRUE; break; }
	#endif
	}

/* If the sequence of hex digits does not end with '}', then we don't	if (overflow)
recognize this construct; fall through to the normal \x handling. */	{
}	while (MAX_255(ptr) && (digitab[ptr] & ctype_xdigit) != 0) ptr++;
	*errorcodeptr = ERR34;
	}

/* Read just a single-byte hex-defined char */	else if (*ptr == CHAR_RIGHT_CURLY_BRACKET)
	{
	if (utf && c >= 0xd800 && c <= 0xdfff) *errorcodeptr = ERR73;
	}

c = 0;	/* If the sequence of hex digits does not end with '}', give an error.
while (i++ < 2 && (digitab[ptr[1]] & ctype_xdigit) != 0)	We used just to recognize this construct and fall through to the normal
{	\x handling, but nowadays Perl gives an error, which seems much more
int cc; /* Some compilers don't like */	sensible, so we do too. */
cc = (++ptr); / ++ in initializers */
	else *errorcodeptr = ERR79;
	} /* End of \x{} processing */

	/* Read a single-byte hex-defined char (up to two hex digits after \x) */

	else
	{
	c = 0;
	while (i++ < 2 && MAX_255(ptr[1]) && (digitab[ptr[1]] & ctype_xdigit) != 0)
	{
	pcre_uint32 cc; /* Some compilers don't like */
	cc = (++ptr); / ++ in initializers */
#ifndef EBCDIC /* ASCII/UTF-8 coding */	#ifndef EBCDIC /* ASCII/UTF-8 coding */
if (cc >= CHAR_a) cc -= 32; /* Convert to upper case */	if (cc >= CHAR_a) cc -= 32; /* Convert to upper case */
c = c * 16 + cc - ((cc < CHAR_A)? CHAR_0 : (CHAR_A - 10));	c = c * 16 + cc - ((cc < CHAR_A)? CHAR_0 : (CHAR_A - 10));
#else /* EBCDIC coding */	#else /* EBCDIC coding */
if (cc <= CHAR_z) cc += 64; /* Convert to upper case */	if (cc <= CHAR_z) cc += 64; /* Convert to upper case */
c = c * 16 + cc - ((cc >= CHAR_0)? CHAR_0 : (CHAR_A - 10));	c = c * 16 + cc - ((cc >= CHAR_0)? CHAR_0 : (CHAR_A - 10));
#endif	#endif
}	}
	} /* End of \xdd handling */
	} /* End of Perl-style \x handling */
break;	break;

/* For \c, a following letter is upper-cased; then the 0x40 bit is flipped.	/* For \c, a following letter is upper-cased; then the 0x40 bit is flipped.
Line 984 else	Line 1401 else

case CHAR_c:	case CHAR_c:
c = *(++ptr);	c = *(++ptr);
if (c == 0)	if (c == CHAR_NULL)
{	{
*errorcodeptr = ERR2;	*errorcodeptr = ERR2;
break;	break;
Line 1024 else	Line 1441 else
newline". PCRE does not support \N{name}. However, it does support	newline". PCRE does not support \N{name}. However, it does support
quantification such as \N{2,3}. */	quantification such as \N{2,3}. */

if (c == -ESC_N && ptr[1] == CHAR_LEFT_CURLY_BRACKET &&	if (escape == ESC_N && ptr[1] == CHAR_LEFT_CURLY_BRACKET &&
!is_counted_repeat(ptr+2))	!is_counted_repeat(ptr+2))
*errorcodeptr = ERR37;	*errorcodeptr = ERR37;

/* If PCRE_UCP is set, we change the values for \d etc. */	/* If PCRE_UCP is set, we change the values for \d etc. */

if ((options & PCRE_UCP) != 0 && c <= -ESC_D && c >= -ESC_w)	if ((options & PCRE_UCP) != 0 && escape >= ESC_D && escape <= ESC_w)
c -= (ESC_DU - ESC_D);	escape += (ESC_DU - ESC_D);

/* Set the pointer to the final character before returning. */	/* Set the pointer to the final character before returning. */

*ptrptr = ptr;	*ptrptr = ptr;
return c;	*chptr = c;
	return escape;
}	}


Line 1054 escape sequence.	Line 1472 escape sequence.
Argument:	Argument:
ptrptr points to the pattern position pointer	ptrptr points to the pattern position pointer
negptr points to a boolean that is set TRUE for negation else FALSE	negptr points to a boolean that is set TRUE for negation else FALSE
dptr points to an int that is set to the detailed property value	ptypeptr points to an unsigned int that is set to the type value
	pdataptr points to an unsigned int that is set to the detailed property value
errorcodeptr points to the error code variable	errorcodeptr points to the error code variable

Returns: type value from ucp_type_table, or -1 for an invalid type	Returns: TRUE if the type value was found, or FALSE for an invalid type
*/	*/

static int	static BOOL
get_ucp(const uschar *ptrptr, BOOL negptr, int dptr, int errorcodeptr)	get_ucp(const pcre_uchar *ptrptr, BOOL negptr, unsigned int *ptypeptr,
	unsigned int pdataptr, int errorcodeptr)
{	{
int c, i, bot, top;	pcre_uchar c;
const uschar ptr = ptrptr;	int i, bot, top;
char name[32];	const pcre_uchar ptr = ptrptr;
	pcre_uchar name[32];

c = *(++ptr);	c = *(++ptr);
if (c == 0) goto ERROR_RETURN;	if (c == CHAR_NULL) goto ERROR_RETURN;

*negptr = FALSE;	*negptr = FALSE;

Line 1082 if (c == CHAR_LEFT_CURLY_BRACKET)	Line 1503 if (c == CHAR_LEFT_CURLY_BRACKET)
*negptr = TRUE;	*negptr = TRUE;
ptr++;	ptr++;
}	}
for (i = 0; i < (int)sizeof(name) - 1; i++)	for (i = 0; i < (int)(sizeof(name) / sizeof(pcre_uchar)) - 1; i++)
{	{
c = *(++ptr);	c = *(++ptr);
if (c == 0) goto ERROR_RETURN;	if (c == CHAR_NULL) goto ERROR_RETURN;
if (c == CHAR_RIGHT_CURLY_BRACKET) break;	if (c == CHAR_RIGHT_CURLY_BRACKET) break;
name[i] = c;	name[i] = c;
}	}
Line 1106 else	Line 1527 else
/* Search for a recognized property name using binary chop */	/* Search for a recognized property name using binary chop */

bot = 0;	bot = 0;
top = _pcre_utt_size;	top = PRIV(utt_size);

while (bot < top)	while (bot < top)
{	{
	int r;
i = (bot + top) >> 1;	i = (bot + top) >> 1;
c = strcmp(name, _pcre_utt_names + _pcre_utt[i].name_offset);	r = STRCMP_UC_C8(name, PRIV(utt_names) + PRIV(utt)[i].name_offset);
if (c == 0)	if (r == 0)
{	{
*dptr = _pcre_utt[i].value;	*ptypeptr = PRIV(utt)[i].type;
return _pcre_utt[i].type;	*pdataptr = PRIV(utt)[i].value;
	return TRUE;
}	}
if (c > 0) bot = i + 1; else top = i;	if (r > 0) bot = i + 1; else top = i;
}	}

*errorcodeptr = ERR47;	*errorcodeptr = ERR47;
*ptrptr = ptr;	*ptrptr = ptr;
return -1;	return FALSE;

ERROR_RETURN:	ERROR_RETURN:
*errorcodeptr = ERR46;	*errorcodeptr = ERR46;
*ptrptr = ptr;	*ptrptr = ptr;
return -1;	return FALSE;
}	}
#endif	#endif




/*************************************************	/*************************************************
* Read repeat counts *	* Read repeat counts *
*************************************************/	*************************************************/
Line 1153 Returns: pointer to '}' on success;	Line 1575 Returns: pointer to '}' on success;
current ptr on error, with errorcodeptr set non-zero	current ptr on error, with errorcodeptr set non-zero
*/	*/

static const uschar *	static const pcre_uchar *
read_repeat_counts(const uschar p, int minp, int maxp, int errorcodeptr)	read_repeat_counts(const pcre_uchar p, int minp, int maxp, int errorcodeptr)
{	{
int min = 0;	int min = 0;
int max = -1;	int max = -1;
Line 1162 int max = -1;	Line 1584 int max = -1;
/* Read the minimum value and do a paranoid check: a negative value indicates	/* Read the minimum value and do a paranoid check: a negative value indicates
an integer overflow. */	an integer overflow. */

while ((digitab[p] & ctype_digit) != 0) min = min 10 + *p++ - CHAR_0;	while (IS_DIGIT(p)) min = min 10 + (int)(*p++ - CHAR_0);
if (min < 0 \|\| min > 65535)	if (min < 0 \|\| min > 65535)
{	{
*errorcodeptr = ERR5;	*errorcodeptr = ERR5;
Line 1177 if (*p == CHAR_RIGHT_CURLY_BRACKET) max = min; else	Line 1599 if (*p == CHAR_RIGHT_CURLY_BRACKET) max = min; else
if (*(++p) != CHAR_RIGHT_CURLY_BRACKET)	if (*(++p) != CHAR_RIGHT_CURLY_BRACKET)
{	{
max = 0;	max = 0;
while((digitab[p] & ctype_digit) != 0) max = max 10 + *p++ - CHAR_0;	while(IS_DIGIT(p)) max = max 10 + (int)(*p++ - CHAR_0);
if (max < 0 \|\| max > 65535)	if (max < 0 \|\| max > 65535)
{	{
*errorcodeptr = ERR5;	*errorcodeptr = ERR5;
Line 1202 return p;	Line 1624 return p;


/*************************************************	/*************************************************
* Subroutine for finding forward reference *
*************************************************/

/* This recursive function is called only from find_parens() below. The
top-level call starts at the beginning of the pattern. All other calls must
start at a parenthesis. It scans along a pattern's text looking for capturing
subpatterns, and counting them. If it finds a named pattern that matches the
name it is given, it returns its number. Alternatively, if the name is NULL, it
returns when it reaches a given numbered subpattern. Recursion is used to keep
track of subpatterns that reset the capturing group numbers - the (?\| feature.

This function was originally called only from the second pass, in which we know
that if (?< or (?' or (?P< is encountered, the name will be correctly
terminated because that is checked in the first pass. There is now one call to
this function in the first pass, to check for a recursive back reference by
name (so that we can make the whole group atomic). In this case, we need check
only up to the current position in the pattern, and that is still OK because
and previous occurrences will have been checked. To make this work, the test
for "end of pattern" is a check against cd->end_pattern in the main loop,
instead of looking for a binary zero. This means that the special first-pass
call can adjust cd->end_pattern temporarily. (Checks for binary zero while
processing items within the loop are OK, because afterwards the main loop will
terminate.)

Arguments:
ptrptr address of the current character pointer (updated)
cd compile background data
name name to seek, or NULL if seeking a numbered subpattern
lorn name length, or subpattern number if name is NULL
xmode TRUE if we are in /x mode
utf8 TRUE if we are in UTF-8 mode
count pointer to the current capturing subpattern number (updated)

Returns: the number of the named subpattern, or -1 if not found
*/

static int
find_parens_sub(uschar *ptrptr, compile_data cd, const uschar *name, int lorn,
BOOL xmode, BOOL utf8, int *count)
{
uschar ptr = ptrptr;
int start_count = *count;
int hwm_count = start_count;
BOOL dup_parens = FALSE;

/* If the first character is a parenthesis, check on the type of group we are
dealing with. The very first call may not start with a parenthesis. */

if (ptr[0] == CHAR_LEFT_PARENTHESIS)
{
/* Handle specials such as (SKIP) or (UTF8) etc. */

if (ptr[1] == CHAR_ASTERISK) ptr += 2;

/* Handle a normal, unnamed capturing parenthesis. */

else if (ptr[1] != CHAR_QUESTION_MARK)
{
*count += 1;
if (name == NULL && count == lorn) return count;
ptr++;
}

/* All cases now have (? at the start. Remember when we are in a group
where the parenthesis numbers are duplicated. */

else if (ptr[2] == CHAR_VERTICAL_LINE)
{
ptr += 3;
dup_parens = TRUE;
}

/* Handle comments; all characters are allowed until a ket is reached. */

else if (ptr[2] == CHAR_NUMBER_SIGN)
{
for (ptr += 3; ptr != 0; ptr++) if (ptr == CHAR_RIGHT_PARENTHESIS) break;
goto FAIL_EXIT;
}

/* Handle a condition. If it is an assertion, just carry on so that it
is processed as normal. If not, skip to the closing parenthesis of the
condition (there can't be any nested parens). */

else if (ptr[2] == CHAR_LEFT_PARENTHESIS)
{
ptr += 2;
if (ptr[1] != CHAR_QUESTION_MARK)
{
while (ptr != 0 && ptr != CHAR_RIGHT_PARENTHESIS) ptr++;
if (*ptr != 0) ptr++;
}
}

/* Start with (? but not a condition. */

else
{
ptr += 2;
if (ptr == CHAR_P) ptr++; / Allow optional P */

/* We have to disambiguate (?<! and (?<= from (?<name> for named groups */

if ((*ptr == CHAR_LESS_THAN_SIGN && ptr[1] != CHAR_EXCLAMATION_MARK &&
ptr[1] != CHAR_EQUALS_SIGN) \|\| *ptr == CHAR_APOSTROPHE)
{
int term;
const uschar *thisname;
*count += 1;
if (name == NULL && count == lorn) return count;
term = *ptr++;
if (term == CHAR_LESS_THAN_SIGN) term = CHAR_GREATER_THAN_SIGN;
thisname = ptr;
while (*ptr != term) ptr++;
if (name != NULL && lorn == ptr - thisname &&
strncmp((const char )name, (const char )thisname, lorn) == 0)
return *count;
term++;
}
}
}

/* Past any initial parenthesis handling, scan for parentheses or vertical
bars. Stop if we get to cd->end_pattern. Note that this is important for the
first-pass call when this value is temporarily adjusted to stop at the current
position. So DO NOT change this to a test for binary zero. */

for (; ptr < cd->end_pattern; ptr++)
{
/* Skip over backslashed characters and also entire \Q...\E */

if (*ptr == CHAR_BACKSLASH)
{
if (*(++ptr) == 0) goto FAIL_EXIT;
if (*ptr == CHAR_Q) for (;;)
{
while ((++ptr) != 0 && ptr != CHAR_BACKSLASH) {};
if (*ptr == 0) goto FAIL_EXIT;
if (*(++ptr) == CHAR_E) break;
}
continue;
}

/* Skip over character classes; this logic must be similar to the way they
are handled for real. If the first character is '^', skip it. Also, if the
first few characters (either before or after ^) are \Q\E or \E we skip them
too. This makes for compatibility with Perl. Note the use of STR macros to
encode "Q\\E" so that it works in UTF-8 on EBCDIC platforms. */

if (*ptr == CHAR_LEFT_SQUARE_BRACKET)
{
BOOL negate_class = FALSE;
for (;;)
{
if (ptr[1] == CHAR_BACKSLASH)
{
if (ptr[2] == CHAR_E)
ptr+= 2;
else if (strncmp((const char *)ptr+2,
STR_Q STR_BACKSLASH STR_E, 3) == 0)
ptr += 4;
else
break;
}
else if (!negate_class && ptr[1] == CHAR_CIRCUMFLEX_ACCENT)
{
negate_class = TRUE;
ptr++;
}
else break;
}

/* If the next character is ']', it is a data character that must be
skipped, except in JavaScript compatibility mode. */

if (ptr[1] == CHAR_RIGHT_SQUARE_BRACKET &&
(cd->external_options & PCRE_JAVASCRIPT_COMPAT) == 0)
ptr++;

while (*(++ptr) != CHAR_RIGHT_SQUARE_BRACKET)
{
if (*ptr == 0) return -1;
if (*ptr == CHAR_BACKSLASH)
{
if (*(++ptr) == 0) goto FAIL_EXIT;
if (*ptr == CHAR_Q) for (;;)
{
while ((++ptr) != 0 && ptr != CHAR_BACKSLASH) {};
if (*ptr == 0) goto FAIL_EXIT;
if (*(++ptr) == CHAR_E) break;
}
continue;
}
}
continue;
}

/* Skip comments in /x mode */

if (xmode && *ptr == CHAR_NUMBER_SIGN)
{
ptr++;
while (*ptr != 0)
{
if (IS_NEWLINE(ptr)) { ptr += cd->nllen - 1; break; }
ptr++;
#ifdef SUPPORT_UTF8
if (utf8) while ((*ptr & 0xc0) == 0x80) ptr++;
#endif
}
if (*ptr == 0) goto FAIL_EXIT;
continue;
}

/* Check for the special metacharacters */

if (*ptr == CHAR_LEFT_PARENTHESIS)
{
int rc = find_parens_sub(&ptr, cd, name, lorn, xmode, utf8, count);
if (rc > 0) return rc;
if (*ptr == 0) goto FAIL_EXIT;
}

else if (*ptr == CHAR_RIGHT_PARENTHESIS)
{
if (dup_parens && count < hwm_count) count = hwm_count;
goto FAIL_EXIT;
}

else if (*ptr == CHAR_VERTICAL_LINE && dup_parens)
{
if (count > hwm_count) hwm_count = count;
*count = start_count;
}
}

FAIL_EXIT:
*ptrptr = ptr;
return -1;
}




/*************************************************
* Find forward referenced subpattern *
*************************************************/

/* This function scans along a pattern's text looking for capturing
subpatterns, and counting them. If it finds a named pattern that matches the
name it is given, it returns its number. Alternatively, if the name is NULL, it
returns when it reaches a given numbered subpattern. This is used for forward
references to subpatterns. We used to be able to start this scan from the
current compiling point, using the current count value from cd->bracount, and
do it all in a single loop, but the addition of the possibility of duplicate
subpattern numbers means that we have to scan from the very start, in order to
take account of such duplicates, and to use a recursive function to keep track
of the different types of group.

Arguments:
cd compile background data
name name to seek, or NULL if seeking a numbered subpattern
lorn name length, or subpattern number if name is NULL
xmode TRUE if we are in /x mode
utf8 TRUE if we are in UTF-8 mode

Returns: the number of the found subpattern, or -1 if not found
*/

static int
find_parens(compile_data cd, const uschar name, int lorn, BOOL xmode,
BOOL utf8)
{
uschar ptr = (uschar )cd->start_pattern;
int count = 0;
int rc;

/* If the pattern does not start with an opening parenthesis, the first call
to find_parens_sub() will scan right to the end (if necessary). However, if it
does start with a parenthesis, find_parens_sub() will return when it hits the
matching closing parens. That is why we have to have a loop. */

for (;;)
{
rc = find_parens_sub(&ptr, cd, name, lorn, xmode, utf8, &count);
if (rc > 0 \|\| *ptr++ == 0) break;
}

return rc;
}




/*************************************************
* Find first significant op code *	* Find first significant op code *
*************************************************/	*************************************************/

Line 1513 Arguments:	Line 1640 Arguments:
Returns: pointer to the first significant opcode	Returns: pointer to the first significant opcode
*/	*/

static const uschar*	static const pcre_uchar*
first_significant_code(const uschar *code, BOOL skipassert)	first_significant_code(const pcre_uchar *code, BOOL skipassert)
{	{
for (;;)	for (;;)
{	{
Line 1525 for (;;)	Line 1652 for (;;)
case OP_ASSERTBACK_NOT:	case OP_ASSERTBACK_NOT:
if (!skipassert) return code;	if (!skipassert) return code;
do code += GET(code, 1); while (*code == OP_ALT);	do code += GET(code, 1); while (*code == OP_ALT);
code += _pcre_OP_lengths[*code];	code += PRIV(OP_lengths)[*code];
break;	break;

case OP_WORD_BOUNDARY:	case OP_WORD_BOUNDARY:
Line 1535 for (;;)	Line 1662 for (;;)

case OP_CALLOUT:	case OP_CALLOUT:
case OP_CREF:	case OP_CREF:
case OP_NCREF:	case OP_DNCREF:
case OP_RREF:	case OP_RREF:
case OP_NRREF:	case OP_DNRREF:
case OP_DEF:	case OP_DEF:
code += _pcre_OP_lengths[*code];	code += PRIV(OP_lengths)[*code];
break;	break;

default:	default:
Line 1551 for (;;)	Line 1678 for (;;)




/*************************************************	/*************************************************
* Find the fixed length of a branch *	* Find the fixed length of a branch *
*************************************************/	*************************************************/
Line 1569 and doing the check at the end; a flag specifies which	Line 1695 and doing the check at the end; a flag specifies which

Arguments:	Arguments:
code points to the start of the pattern (the bracket)	code points to the start of the pattern (the bracket)
utf8 TRUE in UTF-8 mode	utf TRUE in UTF-8 / UTF-16 / UTF-32 mode
atend TRUE if called when the pattern is complete	atend TRUE if called when the pattern is complete
cd the "compile data" structure	cd the "compile data" structure

Line 1581 Returns: the fixed length,	Line 1707 Returns: the fixed length,
*/	*/

static int	static int
find_fixedlength(uschar code, BOOL utf8, BOOL atend, compile_data cd)	find_fixedlength(pcre_uchar code, BOOL utf, BOOL atend, compile_data cd)
{	{
int length = -1;	int length = -1;

register int branchlength = 0;	register int branchlength = 0;
register uschar *cc = code + 1 + LINK_SIZE;	register pcre_uchar *cc = code + 1 + LINK_SIZE;

/* Scan along the opcodes for this branch. If we get to the end of the	/* Scan along the opcodes for this branch. If we get to the end of the
branch, check the length against that of the other branches. */	branch, check the length against that of the other branches. */
Line 1594 branch, check the length against that of the other bra	Line 1720 branch, check the length against that of the other bra
for (;;)	for (;;)
{	{
int d;	int d;
uschar ce, cs;	pcre_uchar ce, cs;
register int op = *cc;	register pcre_uchar op = *cc;

switch (op)	switch (op)
{	{
/* We only need to continue for OP_CBRA (normal capturing bracket) and	/* We only need to continue for OP_CBRA (normal capturing bracket) and
Line 1608 for (;;)	Line 1735 for (;;)
case OP_ONCE:	case OP_ONCE:
case OP_ONCE_NC:	case OP_ONCE_NC:
case OP_COND:	case OP_COND:
d = find_fixedlength(cc + ((op == OP_CBRA)? 2:0), utf8, atend, cd);	d = find_fixedlength(cc + ((op == OP_CBRA)? IMM2_SIZE : 0), utf, atend, cd);
if (d < 0) return d;	if (d < 0) return d;
branchlength += d;	branchlength += d;
do cc += GET(cc, 1); while (*cc == OP_ALT);	do cc += GET(cc, 1); while (*cc == OP_ALT);
Line 1639 for (;;)	Line 1766 for (;;)

case OP_RECURSE:	case OP_RECURSE:
if (!atend) return -3;	if (!atend) return -3;
cs = ce = (uschar )cd->start_code + GET(cc, 1); / Start subpattern */	cs = ce = (pcre_uchar )cd->start_code + GET(cc, 1); / Start subpattern */
do ce += GET(ce, 1); while (ce == OP_ALT); / End subpattern */	do ce += GET(ce, 1); while (ce == OP_ALT); / End subpattern */
if (cc > cs && cc < ce) return -1; /* Recursion */	if (cc > cs && cc < ce) return -1; /* Recursion */
d = find_fixedlength(cs + 2, utf8, atend, cd);	d = find_fixedlength(cs + IMM2_SIZE, utf, atend, cd);
if (d < 0) return d;	if (d < 0) return d;
branchlength += d;	branchlength += d;
cc += 1 + LINK_SIZE;	cc += 1 + LINK_SIZE;
Line 1655 for (;;)	Line 1782 for (;;)
case OP_ASSERTBACK:	case OP_ASSERTBACK:
case OP_ASSERTBACK_NOT:	case OP_ASSERTBACK_NOT:
do cc += GET(cc, 1); while (*cc == OP_ALT);	do cc += GET(cc, 1); while (*cc == OP_ALT);
/* Fall through */	cc += PRIV(OP_lengths)[*cc];
	break;

/* Skip over things that don't match chars */	/* Skip over things that don't match chars */

Line 1663 for (;;)	Line 1791 for (;;)
case OP_PRUNE_ARG:	case OP_PRUNE_ARG:
case OP_SKIP_ARG:	case OP_SKIP_ARG:
case OP_THEN_ARG:	case OP_THEN_ARG:
cc += cc[1] + _pcre_OP_lengths[*cc];	cc += cc[1] + PRIV(OP_lengths)[*cc];
break;	break;

case OP_CALLOUT:	case OP_CALLOUT:
Line 1673 for (;;)	Line 1801 for (;;)
case OP_COMMIT:	case OP_COMMIT:
case OP_CREF:	case OP_CREF:
case OP_DEF:	case OP_DEF:
	case OP_DNCREF:
	case OP_DNRREF:
case OP_DOLL:	case OP_DOLL:
case OP_DOLLM:	case OP_DOLLM:
case OP_EOD:	case OP_EOD:
case OP_EODN:	case OP_EODN:
case OP_FAIL:	case OP_FAIL:
case OP_NCREF:
case OP_NRREF:
case OP_NOT_WORD_BOUNDARY:	case OP_NOT_WORD_BOUNDARY:
case OP_PRUNE:	case OP_PRUNE:
case OP_REVERSE:	case OP_REVERSE:
Line 1690 for (;;)	Line 1818 for (;;)
case OP_SOM:	case OP_SOM:
case OP_THEN:	case OP_THEN:
case OP_WORD_BOUNDARY:	case OP_WORD_BOUNDARY:
cc += _pcre_OP_lengths[*cc];	cc += PRIV(OP_lengths)[*cc];
break;	break;

/* Handle literal characters */	/* Handle literal characters */
Line 1701 for (;;)	Line 1829 for (;;)
case OP_NOTI:	case OP_NOTI:
branchlength++;	branchlength++;
cc += 2;	cc += 2;
#ifdef SUPPORT_UTF8	#ifdef SUPPORT_UTF
if (utf8 && cc[-1] >= 0xc0) cc += _pcre_utf8_table4[cc[-1] & 0x3f];	if (utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
#endif	#endif
break;	break;

Line 1713 for (;;)	Line 1841 for (;;)
case OP_EXACTI:	case OP_EXACTI:
case OP_NOTEXACT:	case OP_NOTEXACT:
case OP_NOTEXACTI:	case OP_NOTEXACTI:
branchlength += GET2(cc,1);	branchlength += (int)GET2(cc,1);
cc += 4;	cc += 2 + IMM2_SIZE;
#ifdef SUPPORT_UTF8	#ifdef SUPPORT_UTF
if (utf8 && cc[-1] >= 0xc0) cc += _pcre_utf8_table4[cc[-1] & 0x3f];	if (utf && HAS_EXTRALEN(cc[-1])) cc += GET_EXTRALEN(cc[-1]);
#endif	#endif
break;	break;

case OP_TYPEEXACT:	case OP_TYPEEXACT:
branchlength += GET2(cc,1);	branchlength += GET2(cc,1);
if (cc[3] == OP_PROP \|\| cc[3] == OP_NOTPROP) cc += 2;	if (cc[1 + IMM2_SIZE] == OP_PROP \|\| cc[1 + IMM2_SIZE] == OP_NOTPROP)
cc += 4;	cc += 2;
	cc += 1 + IMM2_SIZE + 1;
break;	break;

/* Handle single-char matchers */	/* Handle single-char matchers */
Line 1757 for (;;)	Line 1886 for (;;)

/* Check a class for variable quantification */	/* Check a class for variable quantification */

#ifdef SUPPORT_UTF8	case OP_CLASS:
	case OP_NCLASS:
	#if defined SUPPORT_UTF \|\| defined COMPILE_PCRE16 \|\| defined COMPILE_PCRE32
case OP_XCLASS:	case OP_XCLASS:
cc += GET(cc, 1) - 33;	/* The original code caused an unsigned overflow in 64 bit systems,
/* Fall through */	so now we use a conditional statement. */
	if (op == OP_XCLASS)
	cc += GET(cc, 1);
	else
	cc += PRIV(OP_lengths)[OP_CLASS];
	#else
	cc += PRIV(OP_lengths)[OP_CLASS];
#endif	#endif

case OP_CLASS:
case OP_NCLASS:
cc += 33;

switch (*cc)	switch (*cc)
{	{
case OP_CRPLUS:
case OP_CRMINPLUS:
case OP_CRSTAR:	case OP_CRSTAR:
case OP_CRMINSTAR:	case OP_CRMINSTAR:
	case OP_CRPLUS:
	case OP_CRMINPLUS:
case OP_CRQUERY:	case OP_CRQUERY:
case OP_CRMINQUERY:	case OP_CRMINQUERY:
	case OP_CRPOSSTAR:
	case OP_CRPOSPLUS:
	case OP_CRPOSQUERY:
return -1;	return -1;

case OP_CRRANGE:	case OP_CRRANGE:
case OP_CRMINRANGE:	case OP_CRMINRANGE:
if (GET2(cc,1) != GET2(cc,3)) return -1;	case OP_CRPOSRANGE:
branchlength += GET2(cc,1);	if (GET2(cc,1) != GET2(cc,1+IMM2_SIZE)) return -1;
cc += 5;	branchlength += (int)GET2(cc,1);
	cc += 1 + 2 * IMM2_SIZE;
break;	break;

default:	default:
Line 1847 for (;;)	Line 1984 for (;;)
case OP_QUERYI:	case OP_QUERYI:
case OP_REF:	case OP_REF:
case OP_REFI:	case OP_REFI:
	case OP_DNREF:
	case OP_DNREFI:
case OP_SBRA:	case OP_SBRA:
case OP_SBRAPOS:	case OP_SBRAPOS:
case OP_SCBRA:	case OP_SCBRA:
Line 1883 for (;;)	Line 2022 for (;;)




/*************************************************	/*************************************************
* Scan compiled regex for specific bracket *	* Scan compiled regex for specific bracket *
*************************************************/	*************************************************/
Line 1896 length.	Line 2034 length.

Arguments:	Arguments:
code points to start of expression	code points to start of expression
utf8 TRUE in UTF-8 mode	utf TRUE in UTF-8 / UTF-16 / UTF-32 mode
number the required bracket number or negative to find a lookbehind	number the required bracket number or negative to find a lookbehind

Returns: pointer to the opcode for the bracket, or NULL if not found	Returns: pointer to the opcode for the bracket, or NULL if not found
*/	*/

const uschar *	const pcre_uchar *
_pcre_find_bracket(const uschar *code, BOOL utf8, int number)	PRIV(find_bracket)(const pcre_uchar *code, BOOL utf, int number)
{	{
for (;;)	for (;;)
{	{
register int c = *code;	register pcre_uchar c = *code;

if (c == OP_END) return NULL;	if (c == OP_END) return NULL;

Line 1921 for (;;)	Line 2059 for (;;)

else if (c == OP_REVERSE)	else if (c == OP_REVERSE)
{	{
if (number < 0) return (uschar *)code;	if (number < 0) return (pcre_uchar *)code;
code += _pcre_OP_lengths[c];	code += PRIV(OP_lengths)[c];
}	}

/* Handle capturing bracket */	/* Handle capturing bracket */
Line 1930 for (;;)	Line 2068 for (;;)
else if (c == OP_CBRA \|\| c == OP_SCBRA \|\|	else if (c == OP_CBRA \|\| c == OP_SCBRA \|\|
c == OP_CBRAPOS \|\| c == OP_SCBRAPOS)	c == OP_CBRAPOS \|\| c == OP_SCBRAPOS)
{	{
int n = GET2(code, 1+LINK_SIZE);	int n = (int)GET2(code, 1+LINK_SIZE);
if (n == number) return (uschar *)code;	if (n == number) return (pcre_uchar *)code;
code += _pcre_OP_lengths[c];	code += PRIV(OP_lengths)[c];
}	}

/* Otherwise, we can get the item's length from the table, except that for	/* Otherwise, we can get the item's length from the table, except that for
Line 1960 for (;;)	Line 2098 for (;;)
case OP_TYPEMINUPTO:	case OP_TYPEMINUPTO:
case OP_TYPEEXACT:	case OP_TYPEEXACT:
case OP_TYPEPOSUPTO:	case OP_TYPEPOSUPTO:
if (code[3] == OP_PROP \|\| code[3] == OP_NOTPROP) code += 2;	if (code[1 + IMM2_SIZE] == OP_PROP \|\| code[1 + IMM2_SIZE] == OP_NOTPROP)
	code += 2;
break;	break;

case OP_MARK:	case OP_MARK:
case OP_PRUNE_ARG:	case OP_PRUNE_ARG:
case OP_SKIP_ARG:	case OP_SKIP_ARG:
code += code[1];
break;

case OP_THEN_ARG:	case OP_THEN_ARG:
code += code[1];	code += code[1];
break;	break;
Line 1976 for (;;)	Line 2112 for (;;)

/* Add in the fixed length from the table */	/* Add in the fixed length from the table */

code += _pcre_OP_lengths[c];	code += PRIV(OP_lengths)[c];

/* In UTF-8 mode, opcodes that are followed by a character may be followed by	/* In UTF-8 mode, opcodes that are followed by a character may be followed by
a multi-byte character. The length in the table is a minimum, so we have to	a multi-byte character. The length in the table is a minimum, so we have to
arrange to skip the extra bytes. */	arrange to skip the extra bytes. */

#ifdef SUPPORT_UTF8	#if defined SUPPORT_UTF && !defined COMPILE_PCRE32
if (utf8) switch(c)	if (utf) switch(c)
{	{
case OP_CHAR:	case OP_CHAR:
case OP_CHARI:	case OP_CHARI:
Line 2013 for (;;)	Line 2149 for (;;)
case OP_MINQUERYI:	case OP_MINQUERYI:
case OP_POSQUERY:	case OP_POSQUERY:
case OP_POSQUERYI:	case OP_POSQUERYI:
if (code[-1] >= 0xc0) code += _pcre_utf8_table4[code[-1] & 0x3f];	if (HAS_EXTRALEN(code[-1])) code += GET_EXTRALEN(code[-1]);
break;	break;
}	}
#else	#else
(void)(utf8); /* Keep compiler happy by referencing function argument */	(void)(utf); /* Keep compiler happy by referencing function argument */
#endif	#endif
}	}
}	}
Line 2034 instance of OP_RECURSE.	Line 2170 instance of OP_RECURSE.

Arguments:	Arguments:
code points to start of expression	code points to start of expression
utf8 TRUE in UTF-8 mode	utf TRUE in UTF-8 / UTF-16 / UTF-32 mode

Returns: pointer to the opcode for OP_RECURSE, or NULL if not found	Returns: pointer to the opcode for OP_RECURSE, or NULL if not found
*/	*/

static const uschar *	static const pcre_uchar *
find_recurse(const uschar *code, BOOL utf8)	find_recurse(const pcre_uchar *code, BOOL utf)
{	{
for (;;)	for (;;)
{	{
register int c = *code;	register pcre_uchar c = *code;
if (c == OP_END) return NULL;	if (c == OP_END) return NULL;
if (c == OP_RECURSE) return code;	if (c == OP_RECURSE) return code;

Line 2079 for (;;)	Line 2215 for (;;)
case OP_TYPEUPTO:	case OP_TYPEUPTO:
case OP_TYPEMINUPTO:	case OP_TYPEMINUPTO:
case OP_TYPEEXACT:	case OP_TYPEEXACT:
if (code[3] == OP_PROP \|\| code[3] == OP_NOTPROP) code += 2;	if (code[1 + IMM2_SIZE] == OP_PROP \|\| code[1 + IMM2_SIZE] == OP_NOTPROP)
	code += 2;
break;	break;

case OP_MARK:	case OP_MARK:
case OP_PRUNE_ARG:	case OP_PRUNE_ARG:
case OP_SKIP_ARG:	case OP_SKIP_ARG:
code += code[1];
break;

case OP_THEN_ARG:	case OP_THEN_ARG:
code += code[1];	code += code[1];
break;	break;
Line 2095 for (;;)	Line 2229 for (;;)

/* Add in the fixed length from the table */	/* Add in the fixed length from the table */

code += _pcre_OP_lengths[c];	code += PRIV(OP_lengths)[c];

/* In UTF-8 mode, opcodes that are followed by a character may be followed	/* In UTF-8 mode, opcodes that are followed by a character may be followed
by a multi-byte character. The length in the table is a minimum, so we have	by a multi-byte character. The length in the table is a minimum, so we have
to arrange to skip the extra bytes. */	to arrange to skip the extra bytes. */

#ifdef SUPPORT_UTF8	#if defined SUPPORT_UTF && !defined COMPILE_PCRE32
if (utf8) switch(c)	if (utf) switch(c)
{	{
case OP_CHAR:	case OP_CHAR:
case OP_CHARI:	case OP_CHARI:
	case OP_NOT:
	case OP_NOTI:
case OP_EXACT:	case OP_EXACT:
case OP_EXACTI:	case OP_EXACTI:
	case OP_NOTEXACT:
	case OP_NOTEXACTI:
case OP_UPTO:	case OP_UPTO:
case OP_UPTOI:	case OP_UPTOI:
	case OP_NOTUPTO:
	case OP_NOTUPTOI:
case OP_MINUPTO:	case OP_MINUPTO:
case OP_MINUPTOI:	case OP_MINUPTOI:
	case OP_NOTMINUPTO:
	case OP_NOTMINUPTOI:
case OP_POSUPTO:	case OP_POSUPTO:
case OP_POSUPTOI:	case OP_POSUPTOI:
	case OP_NOTPOSUPTO:
	case OP_NOTPOSUPTOI:
case OP_STAR:	case OP_STAR:
case OP_STARI:	case OP_STARI:
	case OP_NOTSTAR:
	case OP_NOTSTARI:
case OP_MINSTAR:	case OP_MINSTAR:
case OP_MINSTARI:	case OP_MINSTARI:
	case OP_NOTMINSTAR:
	case OP_NOTMINSTARI:
case OP_POSSTAR:	case OP_POSSTAR:
case OP_POSSTARI:	case OP_POSSTARI:
	case OP_NOTPOSSTAR:
	case OP_NOTPOSSTARI:
case OP_PLUS:	case OP_PLUS:
case OP_PLUSI:	case OP_PLUSI:
	case OP_NOTPLUS:
	case OP_NOTPLUSI:
case OP_MINPLUS:	case OP_MINPLUS:
case OP_MINPLUSI:	case OP_MINPLUSI:
	case OP_NOTMINPLUS:
	case OP_NOTMINPLUSI:
case OP_POSPLUS:	case OP_POSPLUS:
case OP_POSPLUSI:	case OP_POSPLUSI:
	case OP_NOTPOSPLUS:
	case OP_NOTPOSPLUSI:
case OP_QUERY:	case OP_QUERY:
case OP_QUERYI:	case OP_QUERYI:
	case OP_NOTQUERY:
	case OP_NOTQUERYI:
case OP_MINQUERY:	case OP_MINQUERY:
case OP_MINQUERYI:	case OP_MINQUERYI:
	case OP_NOTMINQUERY:
	case OP_NOTMINQUERYI:
case OP_POSQUERY:	case OP_POSQUERY:
case OP_POSQUERYI:	case OP_POSQUERYI:
if (code[-1] >= 0xc0) code += _pcre_utf8_table4[code[-1] & 0x3f];	case OP_NOTPOSQUERY:
	case OP_NOTPOSQUERYI:
	if (HAS_EXTRALEN(code[-1])) code += GET_EXTRALEN(code[-1]);
break;	break;
}	}
#else	#else
(void)(utf8); /* Keep compiler happy by referencing function argument */	(void)(utf); /* Keep compiler happy by referencing function argument */
#endif	#endif
}	}
}	}
Line 2159 bracket whose current branch will already have been sc	Line 2321 bracket whose current branch will already have been sc
Arguments:	Arguments:
code points to start of search	code points to start of search
endcode points to where to stop	endcode points to where to stop
utf8 TRUE if in UTF8 mode	utf TRUE if in UTF- utf TRUE if in UTF-8 / UTF-16 / UTF-32 mode
cd contains pointers to tables etc.	cd contains pointers to tables etc.
	recurses chain of recurse_check to catch mutual recursion

Returns: TRUE if what is matched could be empty	Returns: TRUE if what is matched could be empty
*/	*/

	typedef struct recurse_check {
	struct recurse_check *prev;
	const pcre_uchar *group;
	} recurse_check;

static BOOL	static BOOL
could_be_empty_branch(const uschar code, const uschar endcode, BOOL utf8,	could_be_empty_branch(const pcre_uchar code, const pcre_uchar endcode,
compile_data *cd)	BOOL utf, compile_data cd, recurse_check recurses)
{	{
register int c;	register pcre_uchar c;
for (code = first_significant_code(code + _pcre_OP_lengths[*code], TRUE);	recurse_check this_recurse;

	for (code = first_significant_code(code + PRIV(OP_lengths)[*code], TRUE);
code < endcode;	code < endcode;
code = first_significant_code(code + _pcre_OP_lengths[c], TRUE))	code = first_significant_code(code + PRIV(OP_lengths)[c], TRUE))
{	{
const uschar *ccode;	const pcre_uchar *ccode;

c = *code;	c = *code;

Line 2197 for (code = first_significant_code(code + _pcre_OP_len	Line 2367 for (code = first_significant_code(code + _pcre_OP_len

if (c == OP_RECURSE)	if (c == OP_RECURSE)
{	{
const uschar *scode;	const pcre_uchar *scode = cd->start_code + GET(code, 1);
BOOL empty_branch;	BOOL empty_branch;

/* Test for forward reference */	/* Test for forward reference or uncompleted reference. This is disabled
	when called to scan a completed pattern by setting cd->start_workspace to
	NULL. */

for (scode = cd->start_workspace; scode < cd->hwm; scode += LINK_SIZE)	if (cd->start_workspace != NULL)
if (GET(scode, 0) == code + 1 - cd->start_code) return TRUE;	{
	const pcre_uchar *tcode;
	for (tcode = cd->start_workspace; tcode < cd->hwm; tcode += LINK_SIZE)
	if ((int)GET(tcode, 0) == (int)(code + 1 - cd->start_code)) return TRUE;
	if (GET(scode, 1) == 0) return TRUE; /* Unclosed */
	}

/* Not a forward reference, test for completed backward reference */	/* If we are scanning a completed pattern, there are no forward references
	and all groups are complete. We need to detect whether this is a recursive
	call, as otherwise there will be an infinite loop. If it is a recursion,
	just skip over it. Simple recursions are easily detected. For mutual
	recursions we keep a chain on the stack. */

empty_branch = FALSE;	else
scode = cd->start_code + GET(code, 1);	{
if (GET(scode, 1) == 0) return TRUE; /* Unclosed */	recurse_check *r = recurses;
	const pcre_uchar *endgroup = scode;

/* Completed backwards reference */	do endgroup += GET(endgroup, 1); while (*endgroup == OP_ALT);
	if (code >= scode && code <= endgroup) continue; /* Simple recursion */

	for (r = recurses; r != NULL; r = r->prev)
	if (r->group == scode) break;
	if (r != NULL) continue; /* Mutual recursion */
	}

	/* Completed reference; scan the referenced group, remembering it on the
	stack chain to detect mutual recursions. */

	empty_branch = FALSE;
	this_recurse.prev = recurses;
	this_recurse.group = scode;

do	do
{	{
if (could_be_empty_branch(scode, endcode, utf8, cd))	if (could_be_empty_branch(scode, endcode, utf, cd, &this_recurse))
{	{
empty_branch = TRUE;	empty_branch = TRUE;
break;	break;
Line 2233 for (code = first_significant_code(code + _pcre_OP_len	Line 2428 for (code = first_significant_code(code + _pcre_OP_len
if (c == OP_BRAZERO \|\| c == OP_BRAMINZERO \|\| c == OP_SKIPZERO \|\|	if (c == OP_BRAZERO \|\| c == OP_BRAMINZERO \|\| c == OP_SKIPZERO \|\|
c == OP_BRAPOSZERO)	c == OP_BRAPOSZERO)
{	{
code += _pcre_OP_lengths[c];	code += PRIV(OP_lengths)[c];
do code += GET(code, 1); while (*code == OP_ALT);	do code += GET(code, 1); while (*code == OP_ALT);
c = *code;	c = *code;
continue;	continue;
Line 2271 for (code = first_significant_code(code + _pcre_OP_len	Line 2466 for (code = first_significant_code(code + _pcre_OP_len
empty_branch = FALSE;	empty_branch = FALSE;
do	do
{	{
if (!empty_branch && could_be_empty_branch(code, endcode, utf8, cd))	if (!empty_branch && could_be_empty_branch(code, endcode, utf, cd, NULL))
empty_branch = TRUE;	empty_branch = TRUE;
code += GET(code, 1);	code += GET(code, 1);
}	}
Line 2289 for (code = first_significant_code(code + _pcre_OP_len	Line 2484 for (code = first_significant_code(code + _pcre_OP_len
{	{
/* Check for quantifiers after a class. XCLASS is used for classes that	/* Check for quantifiers after a class. XCLASS is used for classes that
cannot be represented just by a bit map. This includes negated single	cannot be represented just by a bit map. This includes negated single
high-valued characters. The length in _pcre_OP_lengths[] is zero; the	high-valued characters. The length in PRIV(OP_lengths)[] is zero; the
actual length is stored in the compiled code, so we must update "code"	actual length is stored in the compiled code, so we must update "code"
here. */	here. */

#ifdef SUPPORT_UTF8	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
case OP_XCLASS:	case OP_XCLASS:
ccode = code += GET(code, 1);	ccode = code += GET(code, 1);
goto CHECK_CLASS_REPEAT;	goto CHECK_CLASS_REPEAT;
Line 2301 for (code = first_significant_code(code + _pcre_OP_len	Line 2496 for (code = first_significant_code(code + _pcre_OP_len

case OP_CLASS:	case OP_CLASS:
case OP_NCLASS:	case OP_NCLASS:
ccode = code + 33;	ccode = code + PRIV(OP_lengths)[OP_CLASS];

#ifdef SUPPORT_UTF8	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
CHECK_CLASS_REPEAT:	CHECK_CLASS_REPEAT:
#endif	#endif

Line 2313 for (code = first_significant_code(code + _pcre_OP_len	Line 2508 for (code = first_significant_code(code + _pcre_OP_len
case OP_CRMINSTAR:	case OP_CRMINSTAR:
case OP_CRQUERY:	case OP_CRQUERY:
case OP_CRMINQUERY:	case OP_CRMINQUERY:
	case OP_CRPOSSTAR:
	case OP_CRPOSQUERY:
break;	break;

default: /* Non-repeat => class must match */	default: /* Non-repeat => class must match */
case OP_CRPLUS: /* These repeats aren't empty */	case OP_CRPLUS: /* These repeats aren't empty */
case OP_CRMINPLUS:	case OP_CRMINPLUS:
	case OP_CRPOSPLUS:
return FALSE;	return FALSE;

case OP_CRRANGE:	case OP_CRRANGE:
case OP_CRMINRANGE:	case OP_CRMINRANGE:
	case OP_CRPOSRANGE:
if (GET2(ccode, 1) > 0) return FALSE; /* Minimum > 0 */	if (GET2(ccode, 1) > 0) return FALSE; /* Minimum > 0 */
break;	break;
}	}
Line 2329 for (code = first_significant_code(code + _pcre_OP_len	Line 2528 for (code = first_significant_code(code + _pcre_OP_len

/* Opcodes that must match a character */	/* Opcodes that must match a character */

	case OP_ANY:
	case OP_ALLANY:
	case OP_ANYBYTE:

case OP_PROP:	case OP_PROP:
case OP_NOTPROP:	case OP_NOTPROP:
	case OP_ANYNL:

	case OP_NOT_HSPACE:
	case OP_HSPACE:
	case OP_NOT_VSPACE:
	case OP_VSPACE:
case OP_EXTUNI:	case OP_EXTUNI:

case OP_NOT_DIGIT:	case OP_NOT_DIGIT:
case OP_DIGIT:	case OP_DIGIT:
case OP_NOT_WHITESPACE:	case OP_NOT_WHITESPACE:
case OP_WHITESPACE:	case OP_WHITESPACE:
case OP_NOT_WORDCHAR:	case OP_NOT_WORDCHAR:
case OP_WORDCHAR:	case OP_WORDCHAR:
case OP_ANY:
case OP_ALLANY:
case OP_ANYBYTE:
case OP_CHAR:	case OP_CHAR:
case OP_CHARI:	case OP_CHARI:
case OP_NOT:	case OP_NOT:
case OP_NOTI:	case OP_NOTI:

case OP_PLUS:	case OP_PLUS:
	case OP_PLUSI:
case OP_MINPLUS:	case OP_MINPLUS:
case OP_POSPLUS:	case OP_MINPLUSI:
case OP_EXACT:
case OP_NOTPLUS:	case OP_NOTPLUS:
	case OP_NOTPLUSI:
case OP_NOTMINPLUS:	case OP_NOTMINPLUS:
	case OP_NOTMINPLUSI:

	case OP_POSPLUS:
	case OP_POSPLUSI:
case OP_NOTPOSPLUS:	case OP_NOTPOSPLUS:
	case OP_NOTPOSPLUSI:

	case OP_EXACT:
	case OP_EXACTI:
case OP_NOTEXACT:	case OP_NOTEXACT:
	case OP_NOTEXACTI:

case OP_TYPEPLUS:	case OP_TYPEPLUS:
case OP_TYPEMINPLUS:	case OP_TYPEMINPLUS:
case OP_TYPEPOSPLUS:	case OP_TYPEPOSPLUS:
case OP_TYPEEXACT:	case OP_TYPEEXACT:

return FALSE;	return FALSE;

/* These are going to continue, as they may be empty, but we have to	/* These are going to continue, as they may be empty, but we have to
Line 2376 for (code = first_significant_code(code + _pcre_OP_len	Line 2598 for (code = first_significant_code(code + _pcre_OP_len
case OP_TYPEUPTO:	case OP_TYPEUPTO:
case OP_TYPEMINUPTO:	case OP_TYPEMINUPTO:
case OP_TYPEPOSUPTO:	case OP_TYPEPOSUPTO:
if (code[3] == OP_PROP \|\| code[3] == OP_NOTPROP) code += 2;	if (code[1 + IMM2_SIZE] == OP_PROP \|\| code[1 + IMM2_SIZE] == OP_NOTPROP)
	code += 2;
break;	break;

/* End of branch */	/* End of branch */
Line 2389 for (code = first_significant_code(code + _pcre_OP_len	Line 2612 for (code = first_significant_code(code + _pcre_OP_len
return TRUE;	return TRUE;

/* In UTF-8 mode, STAR, MINSTAR, POSSTAR, QUERY, MINQUERY, POSQUERY, UPTO,	/* In UTF-8 mode, STAR, MINSTAR, POSSTAR, QUERY, MINQUERY, POSQUERY, UPTO,
MINUPTO, and POSUPTO may be followed by a multibyte character */	MINUPTO, and POSUPTO and their caseless and negative versions may be
	followed by a multibyte character. */

#ifdef SUPPORT_UTF8	#if defined SUPPORT_UTF && !defined COMPILE_PCRE32
case OP_STAR:	case OP_STAR:
case OP_STARI:	case OP_STARI:
	case OP_NOTSTAR:
	case OP_NOTSTARI:

case OP_MINSTAR:	case OP_MINSTAR:
case OP_MINSTARI:	case OP_MINSTARI:
	case OP_NOTMINSTAR:
	case OP_NOTMINSTARI:

case OP_POSSTAR:	case OP_POSSTAR:
case OP_POSSTARI:	case OP_POSSTARI:
	case OP_NOTPOSSTAR:
	case OP_NOTPOSSTARI:

case OP_QUERY:	case OP_QUERY:
case OP_QUERYI:	case OP_QUERYI:
	case OP_NOTQUERY:
	case OP_NOTQUERYI:

case OP_MINQUERY:	case OP_MINQUERY:
case OP_MINQUERYI:	case OP_MINQUERYI:
	case OP_NOTMINQUERY:
	case OP_NOTMINQUERYI:

case OP_POSQUERY:	case OP_POSQUERY:
case OP_POSQUERYI:	case OP_POSQUERYI:
if (utf8 && code[1] >= 0xc0) code += _pcre_utf8_table4[code[1] & 0x3f];	case OP_NOTPOSQUERY:
	case OP_NOTPOSQUERYI:

	if (utf && HAS_EXTRALEN(code[1])) code += GET_EXTRALEN(code[1]);
break;	break;

case OP_UPTO:	case OP_UPTO:
case OP_UPTOI:	case OP_UPTOI:
	case OP_NOTUPTO:
	case OP_NOTUPTOI:

case OP_MINUPTO:	case OP_MINUPTO:
case OP_MINUPTOI:	case OP_MINUPTOI:
	case OP_NOTMINUPTO:
	case OP_NOTMINUPTOI:

case OP_POSUPTO:	case OP_POSUPTO:
case OP_POSUPTOI:	case OP_POSUPTOI:
if (utf8 && code[3] >= 0xc0) code += _pcre_utf8_table4[code[3] & 0x3f];	case OP_NOTPOSUPTO:
	case OP_NOTPOSUPTOI:

	if (utf && HAS_EXTRALEN(code[1 + IMM2_SIZE])) code += GET_EXTRALEN(code[1 + IMM2_SIZE]);
break;	break;
#endif	#endif

Line 2423 for (code = first_significant_code(code + _pcre_OP_len	Line 2674 for (code = first_significant_code(code + _pcre_OP_len
case OP_MARK:	case OP_MARK:
case OP_PRUNE_ARG:	case OP_PRUNE_ARG:
case OP_SKIP_ARG:	case OP_SKIP_ARG:
code += code[1];
break;

case OP_THEN_ARG:	case OP_THEN_ARG:
code += code[1];	code += code[1];
break;	break;
Line 2457 Arguments:	Line 2705 Arguments:
code points to start of the recursion	code points to start of the recursion
endcode points to where to stop (current RECURSE item)	endcode points to where to stop (current RECURSE item)
bcptr points to the chain of current (unclosed) branch starts	bcptr points to the chain of current (unclosed) branch starts
utf8 TRUE if in UTF-8 mode	utf TRUE if in UTF-8 / UTF-16 / UTF-32 mode
cd pointers to tables etc	cd pointers to tables etc

Returns: TRUE if what is matched could be empty	Returns: TRUE if what is matched could be empty
*/	*/

static BOOL	static BOOL
could_be_empty(const uschar code, const uschar endcode, branch_chain *bcptr,	could_be_empty(const pcre_uchar code, const pcre_uchar endcode,
BOOL utf8, compile_data *cd)	branch_chain bcptr, BOOL utf, compile_data cd)
{	{
while (bcptr != NULL && bcptr->current_branch >= code)	while (bcptr != NULL && bcptr->current_branch >= code)
{	{
if (!could_be_empty_branch(bcptr->current_branch, endcode, utf8, cd))	if (!could_be_empty_branch(bcptr->current_branch, endcode, utf, cd, NULL))
return FALSE;	return FALSE;
bcptr = bcptr->outer;	bcptr = bcptr->outer;
}	}
Line 2479 return TRUE;	Line 2727 return TRUE;


/*************************************************	/*************************************************
	* Base opcode of repeated opcodes *
	*************************************************/

	/* Returns the base opcode for repeated single character type opcodes. If the
	opcode is not a repeated character type, it returns with the original value.

	Arguments: c opcode
	Returns: base opcode for the type
	*/

	static pcre_uchar
	get_repeat_base(pcre_uchar c)
	{
	return (c > OP_TYPEPOSUPTO)? c :
	(c >= OP_TYPESTAR)? OP_TYPESTAR :
	(c >= OP_NOTSTARI)? OP_NOTSTARI :
	(c >= OP_NOTSTAR)? OP_NOTSTAR :
	(c >= OP_STARI)? OP_STARI :
	OP_STAR;
	}



	#ifdef SUPPORT_UCP
	/*************************************************
	* Check a character and a property *
	*************************************************/

	/* This function is called by check_auto_possessive() when a property item
	is adjacent to a fixed character.

	Arguments:
	c the character
	ptype the property type
	pdata the data for the type
	negated TRUE if it's a negated property (\P or \p{^)

	Returns: TRUE if auto-possessifying is OK
	*/

	static BOOL
	check_char_prop(pcre_uint32 c, unsigned int ptype, unsigned int pdata,
	BOOL negated)
	{
	const pcre_uint32 *p;
	const ucd_record *prop = GET_UCD(c);

	switch(ptype)
	{
	case PT_LAMP:
	return (prop->chartype == ucp_Lu \|\|
	prop->chartype == ucp_Ll \|\|
	prop->chartype == ucp_Lt) == negated;

	case PT_GC:
	return (pdata == PRIV(ucp_gentype)[prop->chartype]) == negated;

	case PT_PC:
	return (pdata == prop->chartype) == negated;

	case PT_SC:
	return (pdata == prop->script) == negated;

	/* These are specials */

	case PT_ALNUM:
	return (PRIV(ucp_gentype)[prop->chartype] == ucp_L \|\|
	PRIV(ucp_gentype)[prop->chartype] == ucp_N) == negated;

	/* Perl space used to exclude VT, but from Perl 5.18 it is included, which
	means that Perl space and POSIX space are now identical. PCRE was changed
	at release 8.34. */

	case PT_SPACE: /* Perl space */
	case PT_PXSPACE: /* POSIX space */
	switch(c)
	{
	HSPACE_CASES:
	VSPACE_CASES:
	return negated;

	default:
	return (PRIV(ucp_gentype)[prop->chartype] == ucp_Z) == negated;
	}
	break; /* Control never reaches here */

	case PT_WORD:
	return (PRIV(ucp_gentype)[prop->chartype] == ucp_L \|\|
	PRIV(ucp_gentype)[prop->chartype] == ucp_N \|\|
	c == CHAR_UNDERSCORE) == negated;

	case PT_CLIST:
	p = PRIV(ucd_caseless_sets) + prop->caseset;
	for (;;)
	{
	if (c < *p) return !negated;
	if (c == *p++) return negated;
	}
	break; /* Control never reaches here */
	}

	return FALSE;
	}
	#endif /* SUPPORT_UCP */



	/*************************************************
	* Fill the character property list *
	*************************************************/

	/* Checks whether the code points to an opcode that can take part in auto-
	possessification, and if so, fills a list with its properties.

	Arguments:
	code points to start of expression
	utf TRUE if in UTF-8 / UTF-16 / UTF-32 mode
	fcc points to case-flipping table
	list points to output list
	list[0] will be filled with the opcode
	list[1] will be non-zero if this opcode
	can match an empty character string
	list[2..7] depends on the opcode

	Returns: points to the start of the next opcode if *code is accepted
	NULL if *code is not accepted
	*/

	static const pcre_uchar *
	get_chr_property_list(const pcre_uchar *code, BOOL utf,
	const pcre_uint8 fcc, pcre_uint32 list)
	{
	pcre_uchar c = *code;
	pcre_uchar base;
	const pcre_uchar *end;
	pcre_uint32 chr;

	#ifdef SUPPORT_UCP
	pcre_uint32 *clist_dest;
	const pcre_uint32 *clist_src;
	#else
	utf = utf; /* Suppress "unused parameter" compiler warning */
	#endif

	list[0] = c;
	list[1] = FALSE;
	code++;

	if (c >= OP_STAR && c <= OP_TYPEPOSUPTO)
	{
	base = get_repeat_base(c);
	c -= (base - OP_STAR);

	if (c == OP_UPTO \|\| c == OP_MINUPTO \|\| c == OP_EXACT \|\| c == OP_POSUPTO)
	code += IMM2_SIZE;

	list[1] = (c != OP_PLUS && c != OP_MINPLUS && c != OP_EXACT && c != OP_POSPLUS);

	switch(base)
	{
	case OP_STAR:
	list[0] = OP_CHAR;
	break;

	case OP_STARI:
	list[0] = OP_CHARI;
	break;

	case OP_NOTSTAR:
	list[0] = OP_NOT;
	break;

	case OP_NOTSTARI:
	list[0] = OP_NOTI;
	break;

	case OP_TYPESTAR:
	list[0] = *code;
	code++;
	break;
	}
	c = list[0];
	}

	switch(c)
	{
	case OP_NOT_DIGIT:
	case OP_DIGIT:
	case OP_NOT_WHITESPACE:
	case OP_WHITESPACE:
	case OP_NOT_WORDCHAR:
	case OP_WORDCHAR:
	case OP_ANY:
	case OP_ALLANY:
	case OP_ANYNL:
	case OP_NOT_HSPACE:
	case OP_HSPACE:
	case OP_NOT_VSPACE:
	case OP_VSPACE:
	case OP_EXTUNI:
	case OP_EODN:
	case OP_EOD:
	case OP_DOLL:
	case OP_DOLLM:
	return code;

	case OP_CHAR:
	case OP_NOT:
	GETCHARINCTEST(chr, code);
	list[2] = chr;
	list[3] = NOTACHAR;
	return code;

	case OP_CHARI:
	case OP_NOTI:
	list[0] = (c == OP_CHARI) ? OP_CHAR : OP_NOT;
	GETCHARINCTEST(chr, code);
	list[2] = chr;

	#ifdef SUPPORT_UCP
	if (chr < 128 \|\| (chr < 256 && !utf))
	list[3] = fcc[chr];
	else
	list[3] = UCD_OTHERCASE(chr);
	#elif defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
	list[3] = (chr < 256) ? fcc[chr] : chr;
	#else
	list[3] = fcc[chr];
	#endif

	/* The othercase might be the same value. */

	if (chr == list[3])
	list[3] = NOTACHAR;
	else
	list[4] = NOTACHAR;
	return code;

	#ifdef SUPPORT_UCP
	case OP_PROP:
	case OP_NOTPROP:
	if (code[0] != PT_CLIST)
	{
	list[2] = code[0];
	list[3] = code[1];
	return code + 2;
	}

	/* Convert only if we have enough space. */

	clist_src = PRIV(ucd_caseless_sets) + code[1];
	clist_dest = list + 2;
	code += 2;

	do {
	if (clist_dest >= list + 8)
	{
	/* Early return if there is not enough space. This should never
	happen, since all clists are shorter than 5 character now. */
	list[2] = code[0];
	list[3] = code[1];
	return code;
	}
	clist_dest++ = clist_src;
	}
	while(*clist_src++ != NOTACHAR);

	/* All characters are stored. The terminating NOTACHAR
	is copied form the clist itself. */

	list[0] = (c == OP_PROP) ? OP_CHAR : OP_NOT;
	return code;
	#endif

	case OP_NCLASS:
	case OP_CLASS:
	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
	case OP_XCLASS:
	if (c == OP_XCLASS)
	end = code + GET(code, 0) - 1;
	else
	#endif
	end = code + 32 / sizeof(pcre_uchar);

	switch(*end)
	{
	case OP_CRSTAR:
	case OP_CRMINSTAR:
	case OP_CRQUERY:
	case OP_CRMINQUERY:
	case OP_CRPOSSTAR:
	case OP_CRPOSQUERY:
	list[1] = TRUE;
	end++;
	break;

	case OP_CRPLUS:
	case OP_CRMINPLUS:
	case OP_CRPOSPLUS:
	end++;
	break;

	case OP_CRRANGE:
	case OP_CRMINRANGE:
	case OP_CRPOSRANGE:
	list[1] = (GET2(end, 1) == 0);
	end += 1 + 2 * IMM2_SIZE;
	break;
	}
	list[2] = end - code;
	return end;
	}
	return NULL; /* Opcode not accepted */
	}



	/*************************************************
	* Scan further character sets for match *
	*************************************************/

	/* Checks whether the base and the current opcode have a common character, in
	which case the base cannot be possessified.

	Arguments:
	code points to the byte code
	utf TRUE in UTF-8 / UTF-16 / UTF-32 mode
	cd static compile data
	base_list the data list of the base opcode

	Returns: TRUE if the auto-possessification is possible
	*/

	static BOOL
	compare_opcodes(const pcre_uchar code, BOOL utf, const compile_data cd,
	const pcre_uint32 base_list, const pcre_uchar base_end)
	{
	pcre_uchar c;
	pcre_uint32 list[8];
	const pcre_uint32 *chr_ptr;
	const pcre_uint32 *ochr_ptr;
	const pcre_uint32 *list_ptr;
	const pcre_uchar *next_code;
	const pcre_uint8 *class_bitset;
	const pcre_uint32 set1, set2, *set_end;
	pcre_uint32 chr;
	BOOL accepted, invert_bits;

	/* Note: the base_list[1] contains whether the current opcode has greedy
	(represented by a non-zero value) quantifier. This is a different from
	other character type lists, which stores here that the character iterator
	matches to an empty string (also represented by a non-zero value). */

	for(;;)
	{
	/* All operations move the code pointer forward.
	Therefore infinite recursions are not possible. */

	c = *code;

	/* Skip over callouts */

	if (c == OP_CALLOUT)
	{
	code += PRIV(OP_lengths)[c];
	continue;
	}

	if (c == OP_ALT)
	{
	do code += GET(code, 1); while (*code == OP_ALT);
	c = *code;
	}

	switch(c)
	{
	case OP_END:
	case OP_KETRPOS:
	/* TRUE only in greedy case. The non-greedy case could be replaced by
	an OP_EXACT, but it is probably not worth it. (And note that OP_EXACT
	uses more memory, which we cannot get at this stage.) */

	return base_list[1] != 0;

	case OP_KET:
	/* If the bracket is capturing, and referenced by an OP_RECURSE, or
	it is an atomic sub-pattern (assert, once, etc.) the non-greedy case
	cannot be converted to a possessive form. */

	if (base_list[1] == 0) return FALSE;

	switch(*(code - GET(code, 1)))
	{
	case OP_ASSERT:
	case OP_ASSERT_NOT:
	case OP_ASSERTBACK:
	case OP_ASSERTBACK_NOT:
	case OP_ONCE:
	case OP_ONCE_NC:
	/* Atomic sub-patterns and assertions can always auto-possessify their
	last iterator. */
	return TRUE;
	}

	code += PRIV(OP_lengths)[c];
	continue;

	case OP_ONCE:
	case OP_ONCE_NC:
	case OP_BRA:
	case OP_CBRA:
	next_code = code + GET(code, 1);
	code += PRIV(OP_lengths)[c];

	while (*next_code == OP_ALT)
	{
	if (!compare_opcodes(code, utf, cd, base_list, base_end)) return FALSE;
	code = next_code + 1 + LINK_SIZE;
	next_code += GET(next_code, 1);
	}
	continue;

	case OP_BRAZERO:
	case OP_BRAMINZERO:

	next_code = code + 1;
	if (next_code != OP_BRA && next_code != OP_CBRA
	&& next_code != OP_ONCE && next_code != OP_ONCE_NC) return FALSE;

	do next_code += GET(next_code, 1); while (*next_code == OP_ALT);

	/* The bracket content will be checked by the
	OP_BRA/OP_CBRA case above. */
	next_code += 1 + LINK_SIZE;
	if (!compare_opcodes(next_code, utf, cd, base_list, base_end))
	return FALSE;

	code += PRIV(OP_lengths)[c];
	continue;
	}

	/* Check for a supported opcode, and load its properties. */

	code = get_chr_property_list(code, utf, cd->fcc, list);
	if (code == NULL) return FALSE; /* Unsupported */

	/* If either opcode is a small character list, set pointers for comparing
	characters from that list with another list, or with a property. */

	if (base_list[0] == OP_CHAR)
	{
	chr_ptr = base_list + 2;
	list_ptr = list;
	}
	else if (list[0] == OP_CHAR)
	{
	chr_ptr = list + 2;
	list_ptr = base_list;
	}

	/* Character bitsets can also be compared to certain opcodes. */

	else if (base_list[0] == OP_CLASS \|\| list[0] == OP_CLASS
	#ifdef COMPILE_PCRE8
	/* In 8 bit, non-UTF mode, OP_CLASS and OP_NCLASS are the same. */
	\|\| (!utf && (base_list[0] == OP_NCLASS \|\| list[0] == OP_NCLASS))
	#endif
	)
	{
	#ifdef COMPILE_PCRE8
	if (base_list[0] == OP_CLASS \|\| (!utf && base_list[0] == OP_NCLASS))
	#else
	if (base_list[0] == OP_CLASS)
	#endif
	{
	set1 = (pcre_uint32 *)(base_end - base_list[2]);
	list_ptr = list;
	}
	else
	{
	set1 = (pcre_uint32 *)(code - list[2]);
	list_ptr = base_list;
	}

	invert_bits = FALSE;
	switch(list_ptr[0])
	{
	case OP_CLASS:
	case OP_NCLASS:
	set2 = (pcre_uint32 *)
	((list_ptr == list ? code : base_end) - list_ptr[2]);
	break;

	/* OP_XCLASS cannot be supported here, because its bitset
	is not necessarily complete. E.g: [a-\0x{200}] is stored
	as a character range, and the appropriate bits are not set. */

	case OP_NOT_DIGIT:
	invert_bits = TRUE;
	/* Fall through */
	case OP_DIGIT:
	set2 = (pcre_uint32 *)(cd->cbits + cbit_digit);
	break;

	case OP_NOT_WHITESPACE:
	invert_bits = TRUE;
	/* Fall through */
	case OP_WHITESPACE:
	set2 = (pcre_uint32 *)(cd->cbits + cbit_space);
	break;

	case OP_NOT_WORDCHAR:
	invert_bits = TRUE;
	/* Fall through */
	case OP_WORDCHAR:
	set2 = (pcre_uint32 *)(cd->cbits + cbit_word);
	break;

	default:
	return FALSE;
	}

	/* Compare 4 bytes to improve speed. */
	set_end = set1 + (32 / 4);
	if (invert_bits)
	{
	do
	{
	if ((set1++ & ~(set2++)) != 0) return FALSE;
	}
	while (set1 < set_end);
	}
	else
	{
	do
	{
	if ((set1++ & set2++) != 0) return FALSE;
	}
	while (set1 < set_end);
	}

	if (list[1] == 0) return TRUE;
	/* Might be an empty repeat. */
	continue;
	}

	/* Some property combinations also acceptable. Unicode property opcodes are
	processed specially; the rest can be handled with a lookup table. */

	else
	{
	pcre_uint32 leftop, rightop;

	leftop = base_list[0];
	rightop = list[0];

	#ifdef SUPPORT_UCP
	accepted = FALSE; /* Always set in non-unicode case. */
	if (leftop == OP_PROP \|\| leftop == OP_NOTPROP)
	{
	if (rightop == OP_EOD)
	accepted = TRUE;
	else if (rightop == OP_PROP \|\| rightop == OP_NOTPROP)
	{
	int n;
	const pcre_uint8 *p;
	BOOL same = leftop == rightop;
	BOOL lisprop = leftop == OP_PROP;
	BOOL risprop = rightop == OP_PROP;
	BOOL bothprop = lisprop && risprop;

	/* There's a table that specifies how each combination is to be
	processed:
	0 Always return FALSE (never auto-possessify)
	1 Character groups are distinct (possessify if both are OP_PROP)
	2 Check character categories in the same group (general or particular)
	3 Return TRUE if the two opcodes are not the same
	... see comments below
	*/

	n = propposstab[base_list[2]][list[2]];
	switch(n)
	{
	case 0: break;
	case 1: accepted = bothprop; break;
	case 2: accepted = (base_list[3] == list[3]) != same; break;
	case 3: accepted = !same; break;

	case 4: /* Left general category, right particular category */
	accepted = risprop && catposstab[base_list[3]][list[3]] == same;
	break;

	case 5: /* Right general category, left particular category */
	accepted = lisprop && catposstab[list[3]][base_list[3]] == same;
	break;

	/* This code is logically tricky. Think hard before fiddling with it.
	The posspropstab table has four entries per row. Each row relates to
	one of PCRE's special properties such as ALNUM or SPACE or WORD.
	Only WORD actually needs all four entries, but using repeats for the
	others means they can all use the same code below.

	The first two entries in each row are Unicode general categories, and
	apply always, because all the characters they include are part of the
	PCRE character set. The third and fourth entries are a general and a
	particular category, respectively, that include one or more relevant
	characters. One or the other is used, depending on whether the check
	is for a general or a particular category. However, in both cases the
	category contains more characters than the specials that are defined
	for the property being tested against. Therefore, it cannot be used
	in a NOTPROP case.

	Example: the row for WORD contains ucp_L, ucp_N, ucp_P, ucp_Po.
	Underscore is covered by ucp_P or ucp_Po. */

	case 6: /* Left alphanum vs right general category */
	case 7: /* Left space vs right general category */
	case 8: /* Left word vs right general category */
	p = posspropstab[n-6];
	accepted = risprop && lisprop ==
	(list[3] != p[0] &&
	list[3] != p[1] &&
	(list[3] != p[2] \|\| !lisprop));
	break;

	case 9: /* Right alphanum vs left general category */
	case 10: /* Right space vs left general category */
	case 11: /* Right word vs left general category */
	p = posspropstab[n-9];
	accepted = lisprop && risprop ==
	(base_list[3] != p[0] &&
	base_list[3] != p[1] &&
	(base_list[3] != p[2] \|\| !risprop));
	break;

	case 12: /* Left alphanum vs right particular category */
	case 13: /* Left space vs right particular category */
	case 14: /* Left word vs right particular category */
	p = posspropstab[n-12];
	accepted = risprop && lisprop ==
	(catposstab[p[0]][list[3]] &&
	catposstab[p[1]][list[3]] &&
	(list[3] != p[3] \|\| !lisprop));
	break;

	case 15: /* Right alphanum vs left particular category */
	case 16: /* Right space vs left particular category */
	case 17: /* Right word vs left particular category */
	p = posspropstab[n-15];
	accepted = lisprop && risprop ==
	(catposstab[p[0]][base_list[3]] &&
	catposstab[p[1]][base_list[3]] &&
	(base_list[3] != p[3] \|\| !risprop));
	break;
	}
	}
	}

	else
	#endif /* SUPPORT_UCP */

	accepted = leftop >= FIRST_AUTOTAB_OP && leftop <= LAST_AUTOTAB_LEFT_OP &&
	rightop >= FIRST_AUTOTAB_OP && rightop <= LAST_AUTOTAB_RIGHT_OP &&
	autoposstab[leftop - FIRST_AUTOTAB_OP][rightop - FIRST_AUTOTAB_OP];

	if (!accepted)
	return FALSE;

	if (list[1] == 0) return TRUE;
	/* Might be an empty repeat. */
	continue;
	}

	/* Control reaches here only if one of the items is a small character list.
	All characters are checked against the other side. */

	do
	{
	chr = *chr_ptr;

	switch(list_ptr[0])
	{
	case OP_CHAR:
	ochr_ptr = list_ptr + 2;
	do
	{
	if (chr == *ochr_ptr) return FALSE;
	ochr_ptr++;
	}
	while(*ochr_ptr != NOTACHAR);
	break;

	case OP_NOT:
	ochr_ptr = list_ptr + 2;
	do
	{
	if (chr == *ochr_ptr)
	break;
	ochr_ptr++;
	}
	while(*ochr_ptr != NOTACHAR);
	if (ochr_ptr == NOTACHAR) return FALSE; / Not found */
	break;

	/* Note that OP_DIGIT etc. are generated only when PCRE_UCP is not
	set. When it is set, \d etc. are converted into OP_(NOT_)PROP codes. */

	case OP_DIGIT:
	if (chr < 256 && (cd->ctypes[chr] & ctype_digit) != 0) return FALSE;
	break;

	case OP_NOT_DIGIT:
	if (chr > 255 \|\| (cd->ctypes[chr] & ctype_digit) == 0) return FALSE;
	break;

	case OP_WHITESPACE:
	if (chr < 256 && (cd->ctypes[chr] & ctype_space) != 0) return FALSE;
	break;

	case OP_NOT_WHITESPACE:
	if (chr > 255 \|\| (cd->ctypes[chr] & ctype_space) == 0) return FALSE;
	break;

	case OP_WORDCHAR:
	if (chr < 255 && (cd->ctypes[chr] & ctype_word) != 0) return FALSE;
	break;

	case OP_NOT_WORDCHAR:
	if (chr > 255 \|\| (cd->ctypes[chr] & ctype_word) == 0) return FALSE;
	break;

	case OP_HSPACE:
	switch(chr)
	{
	HSPACE_CASES: return FALSE;
	default: break;
	}
	break;

	case OP_NOT_HSPACE:
	switch(chr)
	{
	HSPACE_CASES: break;
	default: return FALSE;
	}
	break;

	case OP_ANYNL:
	case OP_VSPACE:
	switch(chr)
	{
	VSPACE_CASES: return FALSE;
	default: break;
	}
	break;

	case OP_NOT_VSPACE:
	switch(chr)
	{
	VSPACE_CASES: break;
	default: return FALSE;
	}
	break;

	case OP_DOLL:
	case OP_EODN:
	switch (chr)
	{
	case CHAR_CR:
	case CHAR_LF:
	case CHAR_VT:
	case CHAR_FF:
	case CHAR_NEL:
	#ifndef EBCDIC
	case 0x2028:
	case 0x2029:
	#endif /* Not EBCDIC */
	return FALSE;
	}
	break;

	case OP_EOD: /* Can always possessify before \z */
	break;

	#ifdef SUPPORT_UCP
	case OP_PROP:
	case OP_NOTPROP:
	if (!check_char_prop(chr, list_ptr[2], list_ptr[3],
	list_ptr[0] == OP_NOTPROP))
	return FALSE;
	break;
	#endif

	case OP_NCLASS:
	if (chr > 255) return FALSE;
	/* Fall through */

	case OP_CLASS:
	if (chr > 255) break;
	class_bitset = (pcre_uint8 *)
	((list_ptr == list ? code : base_end) - list_ptr[2]);
	if ((class_bitset[chr >> 3] & (1 << (chr & 7))) != 0) return FALSE;
	break;

	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
	case OP_XCLASS:
	if (PRIV(xclass)(chr, (list_ptr == list ? code : base_end) -
	list_ptr[2] + LINK_SIZE, utf)) return FALSE;
	break;
	#endif

	default:
	return FALSE;
	}

	chr_ptr++;
	}
	while(*chr_ptr != NOTACHAR);

	/* At least one character must be matched from this opcode. */

	if (list[1] == 0) return TRUE;
	}

	return FALSE;
	}



	/*************************************************
	* Scan compiled regex for auto-possession *
	*************************************************/

	/* Replaces single character iterations with their possessive alternatives
	if appropriate. This function modifies the compiled opcode!

	Arguments:
	code points to start of the byte code
	utf TRUE in UTF-8 / UTF-16 / UTF-32 mode
	cd static compile data

	Returns: nothing
	*/

	static void
	auto_possessify(pcre_uchar code, BOOL utf, const compile_data cd)
	{
	register pcre_uchar c;
	const pcre_uchar *end;
	pcre_uchar *repeat_opcode;
	pcre_uint32 list[8];

	for (;;)
	{
	c = *code;

	if (c >= OP_STAR && c <= OP_TYPEPOSUPTO)
	{
	c -= get_repeat_base(c) - OP_STAR;
	end = (c <= OP_MINUPTO) ?
	get_chr_property_list(code, utf, cd->fcc, list) : NULL;
	list[1] = c == OP_STAR \|\| c == OP_PLUS \|\| c == OP_QUERY \|\| c == OP_UPTO;

	if (end != NULL && compare_opcodes(end, utf, cd, list, end))
	{
	switch(c)
	{
	case OP_STAR:
	*code += OP_POSSTAR - OP_STAR;
	break;

	case OP_MINSTAR:
	*code += OP_POSSTAR - OP_MINSTAR;
	break;

	case OP_PLUS:
	*code += OP_POSPLUS - OP_PLUS;
	break;

	case OP_MINPLUS:
	*code += OP_POSPLUS - OP_MINPLUS;
	break;

	case OP_QUERY:
	*code += OP_POSQUERY - OP_QUERY;
	break;

	case OP_MINQUERY:
	*code += OP_POSQUERY - OP_MINQUERY;
	break;

	case OP_UPTO:
	*code += OP_POSUPTO - OP_UPTO;
	break;

	case OP_MINUPTO:
	*code += OP_MINUPTO - OP_UPTO;
	break;
	}
	}
	c = *code;
	}
	else if (c == OP_CLASS \|\| c == OP_NCLASS \|\| c == OP_XCLASS)
	{
	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
	if (c == OP_XCLASS)
	repeat_opcode = code + GET(code, 1);
	else
	#endif
	repeat_opcode = code + 1 + (32 / sizeof(pcre_uchar));

	c = *repeat_opcode;
	if (c >= OP_CRSTAR && c <= OP_CRMINRANGE)
	{
	/* end must not be NULL. */
	end = get_chr_property_list(code, utf, cd->fcc, list);

	list[1] = (c & 1) == 0;

	if (compare_opcodes(end, utf, cd, list, end))
	{
	switch (c)
	{
	case OP_CRSTAR:
	case OP_CRMINSTAR:
	*repeat_opcode = OP_CRPOSSTAR;
	break;

	case OP_CRPLUS:
	case OP_CRMINPLUS:
	*repeat_opcode = OP_CRPOSPLUS;
	break;

	case OP_CRQUERY:
	case OP_CRMINQUERY:
	*repeat_opcode = OP_CRPOSQUERY;
	break;

	case OP_CRRANGE:
	case OP_CRMINRANGE:
	*repeat_opcode = OP_CRPOSRANGE;
	break;
	}
	}
	}
	c = *code;
	}

	switch(c)
	{
	case OP_END:
	return;

	case OP_TYPESTAR:
	case OP_TYPEMINSTAR:
	case OP_TYPEPLUS:
	case OP_TYPEMINPLUS:
	case OP_TYPEQUERY:
	case OP_TYPEMINQUERY:
	case OP_TYPEPOSSTAR:
	case OP_TYPEPOSPLUS:
	case OP_TYPEPOSQUERY:
	if (code[1] == OP_PROP \|\| code[1] == OP_NOTPROP) code += 2;
	break;

	case OP_TYPEUPTO:
	case OP_TYPEMINUPTO:
	case OP_TYPEEXACT:
	case OP_TYPEPOSUPTO:
	if (code[1 + IMM2_SIZE] == OP_PROP \|\| code[1 + IMM2_SIZE] == OP_NOTPROP)
	code += 2;
	break;

	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
	case OP_XCLASS:
	code += GET(code, 1);
	break;
	#endif

	case OP_MARK:
	case OP_PRUNE_ARG:
	case OP_SKIP_ARG:
	case OP_THEN_ARG:
	code += code[1];
	break;
	}

	/* Add in the fixed length from the table */

	code += PRIV(OP_lengths)[c];

	/* In UTF-8 mode, opcodes that are followed by a character may be followed by
	a multi-byte character. The length in the table is a minimum, so we have to
	arrange to skip the extra bytes. */

	#if defined SUPPORT_UTF && !defined COMPILE_PCRE32
	if (utf) switch(c)
	{
	case OP_CHAR:
	case OP_CHARI:
	case OP_NOT:
	case OP_NOTI:
	case OP_STAR:
	case OP_MINSTAR:
	case OP_PLUS:
	case OP_MINPLUS:
	case OP_QUERY:
	case OP_MINQUERY:
	case OP_UPTO:
	case OP_MINUPTO:
	case OP_EXACT:
	case OP_POSSTAR:
	case OP_POSPLUS:
	case OP_POSQUERY:
	case OP_POSUPTO:
	case OP_STARI:
	case OP_MINSTARI:
	case OP_PLUSI:
	case OP_MINPLUSI:
	case OP_QUERYI:
	case OP_MINQUERYI:
	case OP_UPTOI:
	case OP_MINUPTOI:
	case OP_EXACTI:
	case OP_POSSTARI:
	case OP_POSPLUSI:
	case OP_POSQUERYI:
	case OP_POSUPTOI:
	case OP_NOTSTAR:
	case OP_NOTMINSTAR:
	case OP_NOTPLUS:
	case OP_NOTMINPLUS:
	case OP_NOTQUERY:
	case OP_NOTMINQUERY:
	case OP_NOTUPTO:
	case OP_NOTMINUPTO:
	case OP_NOTEXACT:
	case OP_NOTPOSSTAR:
	case OP_NOTPOSPLUS:
	case OP_NOTPOSQUERY:
	case OP_NOTPOSUPTO:
	case OP_NOTSTARI:
	case OP_NOTMINSTARI:
	case OP_NOTPLUSI:
	case OP_NOTMINPLUSI:
	case OP_NOTQUERYI:
	case OP_NOTMINQUERYI:
	case OP_NOTUPTOI:
	case OP_NOTMINUPTOI:
	case OP_NOTEXACTI:
	case OP_NOTPOSSTARI:
	case OP_NOTPOSPLUSI:
	case OP_NOTPOSQUERYI:
	case OP_NOTPOSUPTOI:
	if (HAS_EXTRALEN(code[-1])) code += GET_EXTRALEN(code[-1]);
	break;
	}
	#else
	(void)(utf); /* Keep compiler happy by referencing function argument */
	#endif
	}
	}



	/*************************************************
* Check for POSIX class syntax *	* Check for POSIX class syntax *
*************************************************/	*************************************************/

Line 2499 class, but [abc[:x\]pqr:]] is (so that an error can be	Line 3813 class, but [abc[:x\]pqr:]] is (so that an error can be
below handles the special case of \], but does not try to do any other escape	below handles the special case of \], but does not try to do any other escape
processing. This makes it different from Perl for cases such as [:l\ower:]	processing. This makes it different from Perl for cases such as [:l\ower:]
where Perl recognizes it as the POSIX class "lower" but PCRE does not recognize	where Perl recognizes it as the POSIX class "lower" but PCRE does not recognize
"l\ower". This is a lesser evil that not diagnosing bad classes when Perl does,	"l\ower". This is a lesser evil than not diagnosing bad classes when Perl does,
I think.	I think.

A user pointed out that PCRE was rejecting [:a[:digit:]] whereas Perl was not.	A user pointed out that PCRE was rejecting [:a[:digit:]] whereas Perl was not.
Line 2521 Returns: TRUE or FALSE	Line 3835 Returns: TRUE or FALSE
*/	*/

static BOOL	static BOOL
check_posix_syntax(const uschar ptr, const uschar *endptr)	check_posix_syntax(const pcre_uchar ptr, const pcre_uchar *endptr)
{	{
int terminator; /* Don't combine these lines; the Solaris cc */	pcre_uchar terminator; /* Don't combine these lines; the Solaris cc */
terminator = (++ptr); / compiler warns about "non-constant" initializer. */	terminator = (++ptr); / compiler warns about "non-constant" initializer. */
for (++ptr; *ptr != 0; ptr++)	for (++ptr; *ptr != CHAR_NULL; ptr++)
{	{
if (*ptr == CHAR_BACKSLASH && ptr[1] == CHAR_RIGHT_SQUARE_BRACKET)	if (*ptr == CHAR_BACKSLASH && ptr[1] == CHAR_RIGHT_SQUARE_BRACKET)
ptr++;	ptr++;
Line 2565 Returns: a value representing the name, or -1 if u	Line 3879 Returns: a value representing the name, or -1 if u
*/	*/

static int	static int
check_posix_name(const uschar *ptr, int len)	check_posix_name(const pcre_uchar *ptr, int len)
{	{
const char *pn = posix_names;	const char *pn = posix_names;
register int yield = 0;	register int yield = 0;
while (posix_name_lengths[yield] != 0)	while (posix_name_lengths[yield] != 0)
{	{
if (len == posix_name_lengths[yield] &&	if (len == posix_name_lengths[yield] &&
strncmp((const char *)ptr, pn, len) == 0) return yield;	STRNCMP_UC_C8(ptr, pn, (unsigned int)len) == 0) return yield;
pn += posix_name_lengths[yield] + 1;	pn += posix_name_lengths[yield] + 1;
yield++;	yield++;
}	}
Line 2604 value in the reference (which is a group number).	Line 3918 value in the reference (which is a group number).
Arguments:	Arguments:
group points to the start of the group	group points to the start of the group
adjust the amount by which the group is to be moved	adjust the amount by which the group is to be moved
utf8 TRUE in UTF-8 mode	utf TRUE in UTF-8 / UTF-16 / UTF-32 mode
cd contains pointers to tables etc.	cd contains pointers to tables etc.
save_hwm the hwm forward reference pointer at the start of the group	save_hwm the hwm forward reference pointer at the start of the group

Line 2612 Returns: nothing	Line 3926 Returns: nothing
*/	*/

static void	static void
adjust_recurse(uschar group, int adjust, BOOL utf8, compile_data cd,	adjust_recurse(pcre_uchar group, int adjust, BOOL utf, compile_data cd,
uschar *save_hwm)	pcre_uchar *save_hwm)
{	{
uschar *ptr = group;	pcre_uchar *ptr = group;

while ((ptr = (uschar *)find_recurse(ptr, utf8)) != NULL)	while ((ptr = (pcre_uchar *)find_recurse(ptr, utf)) != NULL)
{	{
int offset;	int offset;
uschar *hc;	pcre_uchar *hc;

/* See if this recursion is on the forward reference list. If so, adjust the	/* See if this recursion is on the forward reference list. If so, adjust the
reference. */	reference. */

for (hc = save_hwm; hc < cd->hwm; hc += LINK_SIZE)	for (hc = save_hwm; hc < cd->hwm; hc += LINK_SIZE)
{	{
offset = GET(hc, 0);	offset = (int)GET(hc, 0);
if (cd->start_code + offset == ptr + 1)	if (cd->start_code + offset == ptr + 1)
{	{
PUT(hc, 0, offset + adjust);	PUT(hc, 0, offset + adjust);
Line 2640 while ((ptr = (uschar *)find_recurse(ptr, utf8)) != NU	Line 3954 while ((ptr = (uschar *)find_recurse(ptr, utf8)) != NU

if (hc >= cd->hwm)	if (hc >= cd->hwm)
{	{
offset = GET(ptr, 1);	offset = (int)GET(ptr, 1);
if (cd->start_code + offset >= group) PUT(ptr, 1, offset + adjust);	if (cd->start_code + offset >= group) PUT(ptr, 1, offset + adjust);
}	}

Line 2665 Arguments:	Line 3979 Arguments:
Returns: new code pointer	Returns: new code pointer
*/	*/

static uschar *	static pcre_uchar *
auto_callout(uschar code, const uschar ptr, compile_data *cd)	auto_callout(pcre_uchar code, const pcre_uchar ptr, compile_data *cd)
{	{
*code++ = OP_CALLOUT;	*code++ = OP_CALLOUT;
*code++ = 255;	*code++ = 255;
PUT(code, 0, (int)(ptr - cd->start_pattern)); /* Pattern offset */	PUT(code, 0, (int)(ptr - cd->start_pattern)); /* Pattern offset */
PUT(code, LINK_SIZE, 0); /* Default length */	PUT(code, LINK_SIZE, 0); /* Default length */
return code + 2*LINK_SIZE;	return code + 2 * LINK_SIZE;
}	}


Line 2694 Returns: nothing	Line 4008 Returns: nothing
*/	*/

static void	static void
complete_callout(uschar previous_callout, const uschar ptr, compile_data *cd)	complete_callout(pcre_uchar previous_callout, const pcre_uchar ptr, compile_data *cd)
{	{
int length = (int)(ptr - cd->start_pattern - GET(previous_callout, 2));	int length = (int)(ptr - cd->start_pattern - GET(previous_callout, 2));
PUT(previous_callout, 2 + LINK_SIZE, length);	PUT(previous_callout, 2 + LINK_SIZE, length);
Line 2708 PUT(previous_callout, 2 + LINK_SIZE, length);	Line 4022 PUT(previous_callout, 2 + LINK_SIZE, length);
*************************************************/	*************************************************/

/* This function is passed the start and end of a class range, in UTF-8 mode	/* This function is passed the start and end of a class range, in UTF-8 mode
with UCP support. It searches up the characters, looking for internal ranges of	with UCP support. It searches up the characters, looking for ranges of
characters in the "other" case. Each call returns the next one, updating the	characters in the "other" case. Each call returns the next one, updating the
start address.	start address. A character with multiple other cases is returned on its own
	with a special return value.

Arguments:	Arguments:
cptr points to starting character value; updated	cptr points to starting character value; updated
Line 2718 Arguments:	Line 4033 Arguments:
ocptr where to put start of othercase range	ocptr where to put start of othercase range
odptr where to put end of othercase range	odptr where to put end of othercase range

Yield: TRUE when range returned; FALSE when no more	Yield: -1 when no more
	0 when a range is returned
	>0 the CASESET offset for char with multiple other cases
	in this case, ocptr contains the original
*/	*/

static BOOL	static int
get_othercase_range(unsigned int cptr, unsigned int d, unsigned int ocptr,	get_othercase_range(pcre_uint32 cptr, pcre_uint32 d, pcre_uint32 ocptr,
unsigned int *odptr)	pcre_uint32 *odptr)
{	{
unsigned int c, othercase, next;	pcre_uint32 c, othercase, next;
	unsigned int co;

	/* Find the first character that has an other case. If it has multiple other
	cases, return its case offset value. */

for (c = *cptr; c <= d; c++)	for (c = *cptr; c <= d; c++)
{ if ((othercase = UCD_OTHERCASE(c)) != c) break; }	{
	if ((co = UCD_CASESET(c)) != 0)
	{
	ocptr = c++; / Character that has the set */
	cptr = c; / Rest of input range */
	return (int)co;
	}
	if ((othercase = UCD_OTHERCASE(c)) != c) break;
	}

if (c > d) return FALSE;	if (c > d) return -1; /* Reached end of range */

*ocptr = othercase;	*ocptr = othercase;
next = othercase + 1;	next = othercase + 1;
Line 2741 for (++c; c <= d; c++)	Line 4071 for (++c; c <= d; c++)
next++;	next++;
}	}

*odptr = next - 1;	odptr = next - 1; / End of othercase range */
*cptr = c;	cptr = c; / Rest of input range */
	return 0;
return TRUE;
}	}
	#endif /* SUPPORT_UCP */



/*************************************************	/*************************************************
* Check a character and a property *	* Add a character or range to a class *
*************************************************/	*************************************************/

/* This function is called by check_auto_possessive() when a property item	/* This function packages up the logic of adding a character or range of
is adjacent to a fixed character.	characters to a class. The character values in the arguments will be within the
	valid values for the current mode (8-bit, 16-bit, UTF, etc). This function is
	mutually recursive with the function immediately below.

Arguments:	Arguments:
c the character	classbits the bit map for characters < 256
ptype the property type	uchardptr points to the pointer for extra data
pdata the data for the type	options the options word
negated TRUE if it's a negated property (\P or \p{^)	cd contains pointers to tables etc.
	start start of range character
	end end of range character

Returns: TRUE if auto-possessifying is OK	Returns: the number of < 256 characters added
	the pointer to extra data is updated
*/	*/

static BOOL	static int
check_char_prop(int c, int ptype, int pdata, BOOL negated)	add_to_class(pcre_uint8 classbits, pcre_uchar *uchardptr, int options,
	compile_data *cd, pcre_uint32 start, pcre_uint32 end)
{	{
const ucd_record *prop = GET_UCD(c);	pcre_uint32 c;
switch(ptype)	int n8 = 0;
{
case PT_LAMP:
return (prop->chartype == ucp_Lu \|\|
prop->chartype == ucp_Ll \|\|
prop->chartype == ucp_Lt) == negated;

case PT_GC:	/* If caseless matching is required, scan the range and process alternate
return (pdata == _pcre_ucp_gentype[prop->chartype]) == negated;	cases. In Unicode, there are 8-bit characters that have alternate cases that
	are greater than 255 and vice-versa. Sometimes we can just extend the original
	range. */

case PT_PC:	if ((options & PCRE_CASELESS) != 0)
return (pdata == prop->chartype) == negated;	{
	#ifdef SUPPORT_UCP
	if ((options & PCRE_UTF8) != 0)
	{
	int rc;
	pcre_uint32 oc, od;

case PT_SC:	options &= ~PCRE_CASELESS; /* Remove for recursive calls */
return (pdata == prop->script) == negated;	c = start;

/* These are specials */	while ((rc = get_othercase_range(&c, end, &oc, &od)) >= 0)
	{
	/* Handle a single character that has more than one other case. */

case PT_ALNUM:	if (rc > 0) n8 += add_list_to_class(classbits, uchardptr, options, cd,
return (_pcre_ucp_gentype[prop->chartype] == ucp_L \|\|	PRIV(ucd_caseless_sets) + rc, oc);
_pcre_ucp_gentype[prop->chartype] == ucp_N) == negated;

case PT_SPACE: /* Perl space */	/* Do nothing if the other case range is within the original range. */
return (_pcre_ucp_gentype[prop->chartype] == ucp_Z \|\|
c == CHAR_HT \|\| c == CHAR_NL \|\| c == CHAR_FF \|\| c == CHAR_CR)
== negated;

case PT_PXSPACE: /* POSIX space */	else if (oc >= start && od <= end) continue;
return (_pcre_ucp_gentype[prop->chartype] == ucp_Z \|\|
c == CHAR_HT \|\| c == CHAR_NL \|\| c == CHAR_VT \|\|
c == CHAR_FF \|\| c == CHAR_CR)
== negated;

case PT_WORD:	/* Extend the original range if there is overlap, noting that if oc < c, we
return (_pcre_ucp_gentype[prop->chartype] == ucp_L \|\|	can't have od > end because a subrange is always shorter than the basic
_pcre_ucp_gentype[prop->chartype] == ucp_N \|\|	range. Otherwise, use a recursive call to add the additional range. */
c == CHAR_UNDERSCORE) == negated;
}	else if (oc < start && od >= start - 1) start = oc; /* Extend downwards */
return FALSE;	else if (od > end && oc <= end + 1) end = od; /* Extend upwards */
}	else n8 += add_to_class(classbits, uchardptr, options, cd, oc, od);
	}
	}
	else
#endif /* SUPPORT_UCP */	#endif /* SUPPORT_UCP */

	/* Not UTF-mode, or no UCP */

	for (c = start; c <= end && c < 256; c++)
/*************************************************
* Check if auto-possessifying is possible *
*************************************************/

/* This function is called for unlimited repeats of certain items, to see
whether the next thing could possibly match the repeated item. If not, it makes
sense to automatically possessify the repeated item.

Arguments:
previous pointer to the repeated opcode
utf8 TRUE in UTF-8 mode
ptr next character in pattern
options options bits
cd contains pointers to tables etc.

Returns: TRUE if possessifying is wanted
*/

static BOOL
check_auto_possessive(const uschar previous, BOOL utf8, const uschar ptr,
int options, compile_data *cd)
{
int c, next;
int op_code = *previous++;

/* Skip whitespace and comments in extended mode */

if ((options & PCRE_EXTENDED) != 0)
{
for (;;)
{	{
while ((cd->ctypes[*ptr] & ctype_space) != 0) ptr++;	SETBIT(classbits, cd->fcc[c]);
if (*ptr == CHAR_NUMBER_SIGN)	n8++;
{
ptr++;
while (*ptr != 0)
{
if (IS_NEWLINE(ptr)) { ptr += cd->nllen; break; }
ptr++;
#ifdef SUPPORT_UTF8
if (utf8) while ((*ptr & 0xc0) == 0x80) ptr++;
#endif
}
}
else break;
}	}
}	}

/* If the next item is one that we can handle, get its value. A non-negative	/* Now handle the original range. Adjust the final value according to the bit
value is a character, a negative value is an escape value. */	length - this means that the same lists of (e.g.) horizontal spaces can be used
	in all cases. */

if (*ptr == CHAR_BACKSLASH)	#if defined COMPILE_PCRE8
{	#ifdef SUPPORT_UTF
int temperrorcode = 0;	if ((options & PCRE_UTF8) == 0)
next = check_escape(&ptr, &temperrorcode, cd->bracount, options, FALSE);	#endif
if (temperrorcode != 0) return FALSE;	if (end > 0xff) end = 0xff;
ptr++; /* Point after the escape sequence */
}

else if ((cd->ctypes[*ptr] & ctype_meta) == 0)	#elif defined COMPILE_PCRE16
{	#ifdef SUPPORT_UTF
#ifdef SUPPORT_UTF8	if ((options & PCRE_UTF16) == 0)
if (utf8) { GETCHARINC(next, ptr); } else
#endif	#endif
next = *ptr++;	if (end > 0xffff) end = 0xffff;
}

else return FALSE;	#endif /* COMPILE_PCRE[8\|16] */

/* Skip whitespace and comments in extended mode */	/* If all characters are less than 256, use the bit map. Otherwise use extra
	data. */

if ((options & PCRE_EXTENDED) != 0)	if (end < 0x100)
{	{
for (;;)	for (c = start; c <= end; c++)
{	{
while ((cd->ctypes[*ptr] & ctype_space) != 0) ptr++;	n8++;
if (*ptr == CHAR_NUMBER_SIGN)	SETBIT(classbits, c);
{
ptr++;
while (*ptr != 0)
{
if (IS_NEWLINE(ptr)) { ptr += cd->nllen; break; }
ptr++;
#ifdef SUPPORT_UTF8
if (utf8) while ((*ptr & 0xc0) == 0x80) ptr++;
#endif
}
}
else break;
}	}
}	}

/* If the next thing is itself optional, we have to give up. */	else

if (ptr == CHAR_ASTERISK \|\| ptr == CHAR_QUESTION_MARK \|\|
strncmp((char *)ptr, STR_LEFT_CURLY_BRACKET STR_0 STR_COMMA, 3) == 0)
return FALSE;

/* Now compare the next item with the previous opcode. First, handle cases when
the next item is a character. */

if (next >= 0) switch(op_code)
{	{
case OP_CHAR:	pcre_uchar uchardata = uchardptr;
#ifdef SUPPORT_UTF8
GETCHARTEST(c, previous);
#else
c = *previous;
#endif
return c != next;

/* For CHARI (caseless character) we must check the other case. If we have	#ifdef SUPPORT_UTF
Unicode property support, we can use it to test the other case of	if ((options & PCRE_UTF8) != 0) /* All UTFs use the same flag bit */
high-valued characters. */

case OP_CHARI:
#ifdef SUPPORT_UTF8
GETCHARTEST(c, previous);
#else
c = *previous;
#endif
if (c == next) return FALSE;
#ifdef SUPPORT_UTF8
if (utf8)
{	{
unsigned int othercase;	if (start < end)
if (next < 128) othercase = cd->fcc[next]; else	{
#ifdef SUPPORT_UCP	*uchardata++ = XCL_RANGE;
othercase = UCD_OTHERCASE((unsigned int)next);	uchardata += PRIV(ord2utf)(start, uchardata);
#else	uchardata += PRIV(ord2utf)(end, uchardata);
othercase = NOTACHAR;	}
#endif	else if (start == end)
return (unsigned int)c != othercase;	{
	*uchardata++ = XCL_SINGLE;
	uchardata += PRIV(ord2utf)(start, uchardata);
	}
}	}
else	else
#endif /* SUPPORT_UTF8 */	#endif /* SUPPORT_UTF */
return (c != cd->fcc[next]); /* Non-UTF-8 mode */

/* For OP_NOT and OP_NOTI, the data is always a single-byte character. These	/* Without UTF support, character values are constrained by the bit length,
opcodes are not used for multi-byte characters, because they are coded using	and can only be > 256 for 16-bit and 32-bit libraries. */
an XCLASS instead. */

case OP_NOT:	#ifdef COMPILE_PCRE8
return (c = *previous) == next;	{}

case OP_NOTI:
if ((c = *previous) == next) return TRUE;
#ifdef SUPPORT_UTF8
if (utf8)
{
unsigned int othercase;
if (next < 128) othercase = cd->fcc[next]; else
#ifdef SUPPORT_UCP
othercase = UCD_OTHERCASE(next);
#else	#else
othercase = NOTACHAR;	if (start < end)
#endif
return (unsigned int)c == othercase;
}
else
#endif /* SUPPORT_UTF8 */
return (c == cd->fcc[next]); /* Non-UTF-8 mode */

/* Note that OP_DIGIT etc. are generated only when PCRE_UCP is not set.
When it is set, \d etc. are converted into OP_(NOT_)PROP codes. */

case OP_DIGIT:
return next > 127 \|\| (cd->ctypes[next] & ctype_digit) == 0;

case OP_NOT_DIGIT:
return next <= 127 && (cd->ctypes[next] & ctype_digit) != 0;

case OP_WHITESPACE:
return next > 127 \|\| (cd->ctypes[next] & ctype_space) == 0;

case OP_NOT_WHITESPACE:
return next <= 127 && (cd->ctypes[next] & ctype_space) != 0;

case OP_WORDCHAR:
return next > 127 \|\| (cd->ctypes[next] & ctype_word) == 0;

case OP_NOT_WORDCHAR:
return next <= 127 && (cd->ctypes[next] & ctype_word) != 0;

case OP_HSPACE:
case OP_NOT_HSPACE:
switch(next)
{	{
case 0x09:	*uchardata++ = XCL_RANGE;
case 0x20:	*uchardata++ = start;
case 0xa0:	*uchardata++ = end;
case 0x1680:
case 0x180e:
case 0x2000:
case 0x2001:
case 0x2002:
case 0x2003:
case 0x2004:
case 0x2005:
case 0x2006:
case 0x2007:
case 0x2008:
case 0x2009:
case 0x200A:
case 0x202f:
case 0x205f:
case 0x3000:
return op_code == OP_NOT_HSPACE;
default:
return op_code != OP_NOT_HSPACE;
}	}
	else if (start == end)
case OP_ANYNL:
case OP_VSPACE:
case OP_NOT_VSPACE:
switch(next)
{	{
case 0x0a:	*uchardata++ = XCL_SINGLE;
case 0x0b:	*uchardata++ = start;
case 0x0c:
case 0x0d:
case 0x85:
case 0x2028:
case 0x2029:
return op_code == OP_NOT_VSPACE;
default:
return op_code != OP_NOT_VSPACE;
}	}

#ifdef SUPPORT_UCP
case OP_PROP:
return check_char_prop(next, previous[0], previous[1], FALSE);

case OP_NOTPROP:
return check_char_prop(next, previous[0], previous[1], TRUE);
#endif	#endif

default:	uchardptr = uchardata; / Updata extra data pointer */
return FALSE;
}	}

	return n8; /* Number of 8-bit characters */
	}

/* Handle the case when the next item is \d, \s, etc. Note that when PCRE_UCP
is set, \d turns into ESC_du rather than ESC_d, etc., so ESC_d etc. are
generated only when PCRE_UCP is not set, that is, when only ASCII
characteristics are recognized. Similarly, the opcodes OP_DIGIT etc. are
replaced by OP_PROP codes when PCRE_UCP is set. */

switch(op_code)
{
case OP_CHAR:
case OP_CHARI:
#ifdef SUPPORT_UTF8
GETCHARTEST(c, previous);
#else
c = *previous;
#endif
switch(-next)
{
case ESC_d:
return c > 127 \|\| (cd->ctypes[c] & ctype_digit) == 0;

case ESC_D:
return c <= 127 && (cd->ctypes[c] & ctype_digit) != 0;

case ESC_s:	/*************************************************
return c > 127 \|\| (cd->ctypes[c] & ctype_space) == 0;	* Add a list of characters to a class *
	*************************************************/

case ESC_S:	/* This function is used for adding a list of case-equivalent characters to a
return c <= 127 && (cd->ctypes[c] & ctype_space) != 0;	class, and also for adding a list of horizontal or vertical whitespace. If the
	list is in order (which it should be), ranges of characters are detected and
	handled appropriately. This function is mutually recursive with the function
	above.

case ESC_w:	Arguments:
return c > 127 \|\| (cd->ctypes[c] & ctype_word) == 0;	classbits the bit map for characters < 256
	uchardptr points to the pointer for extra data
	options the options word
	cd contains pointers to tables etc.
	p points to row of 32-bit values, terminated by NOTACHAR
	except character to omit; this is used when adding lists of
	case-equivalent characters to avoid including the one we
	already know about

case ESC_W:	Returns: the number of < 256 characters added
return c <= 127 && (cd->ctypes[c] & ctype_word) != 0;	the pointer to extra data is updated
	*/

case ESC_h:	static int
case ESC_H:	add_list_to_class(pcre_uint8 classbits, pcre_uchar *uchardptr, int options,
switch(c)	compile_data cd, const pcre_uint32 p, unsigned int except)
{	{
case 0x09:	int n8 = 0;
case 0x20:	while (p[0] < NOTACHAR)
case 0xa0:	{
case 0x1680:	int n = 0;
case 0x180e:	if (p[0] != except)
case 0x2000:	{
case 0x2001:	while(p[n+1] == p[0] + n + 1) n++;
case 0x2002:	n8 += add_to_class(classbits, uchardptr, options, cd, p[0], p[n]);
case 0x2003:
case 0x2004:
case 0x2005:
case 0x2006:
case 0x2007:
case 0x2008:
case 0x2009:
case 0x200A:
case 0x202f:
case 0x205f:
case 0x3000:
return -next != ESC_h;
default:
return -next == ESC_h;
}

case ESC_v:
case ESC_V:
switch(c)
{
case 0x0a:
case 0x0b:
case 0x0c:
case 0x0d:
case 0x85:
case 0x2028:
case 0x2029:
return -next != ESC_v;
default:
return -next == ESC_v;
}

/* When PCRE_UCP is set, these values get generated for \d etc. Find
their substitutions and process them. The result will always be either
-ESC_p or -ESC_P. Then fall through to process those values. */

#ifdef SUPPORT_UCP
case ESC_du:
case ESC_DU:
case ESC_wu:
case ESC_WU:
case ESC_su:
case ESC_SU:
{
int temperrorcode = 0;
ptr = substitutes[-next - ESC_DU];
next = check_escape(&ptr, &temperrorcode, 0, options, FALSE);
if (temperrorcode != 0) return FALSE;
ptr++; /* For compatibility */
}
/* Fall through */

case ESC_p:
case ESC_P:
{
int ptype, pdata, errorcodeptr;
BOOL negated;

ptr--; /* Make ptr point at the p or P */
ptype = get_ucp(&ptr, &negated, &pdata, &errorcodeptr);
if (ptype < 0) return FALSE;
ptr++; /* Point past the final curly ket */

/* If the property item is optional, we have to give up. (When generated
from \d etc by PCRE_UCP, this test will have been applied much earlier,
to the original \d etc. At this point, ptr will point to a zero byte. */

if (ptr == CHAR_ASTERISK \|\| ptr == CHAR_QUESTION_MARK \|\|
strncmp((char *)ptr, STR_LEFT_CURLY_BRACKET STR_0 STR_COMMA, 3) == 0)
return FALSE;

/* Do the property check. */

return check_char_prop(c, ptype, pdata, (next == -ESC_P) != negated);
}
#endif

default:
return FALSE;
}	}
	p += n + 1;
	}
	return n8;
	}

/* In principle, support for Unicode properties should be integrated here as
well. It means re-organizing the above code so as to get hold of the property
values before switching on the op-code. However, I wonder how many patterns
combine ASCII \d etc with Unicode properties? (Note that if PCRE_UCP is set,
these op-codes are never generated.) */

case OP_DIGIT:
return next == -ESC_D \|\| next == -ESC_s \|\| next == -ESC_W \|\|
next == -ESC_h \|\| next == -ESC_v \|\| next == -ESC_R;

case OP_NOT_DIGIT:	/*************************************************
return next == -ESC_d;	* Add characters not in a list to a class *
	*************************************************/

case OP_WHITESPACE:	/* This function is used for adding the complement of a list of horizontal or
return next == -ESC_S \|\| next == -ESC_d \|\| next == -ESC_w \|\| next == -ESC_R;	vertical whitespace to a class. The list must be in order.

case OP_NOT_WHITESPACE:	Arguments:
return next == -ESC_s \|\| next == -ESC_h \|\| next == -ESC_v;	classbits the bit map for characters < 256
	uchardptr points to the pointer for extra data
	options the options word
	cd contains pointers to tables etc.
	p points to row of 32-bit values, terminated by NOTACHAR

case OP_HSPACE:	Returns: the number of < 256 characters added
return next == -ESC_S \|\| next == -ESC_H \|\| next == -ESC_d \|\|	the pointer to extra data is updated
next == -ESC_w \|\| next == -ESC_v \|\| next == -ESC_R;	*/

case OP_NOT_HSPACE:	static int
return next == -ESC_h;	add_not_list_to_class(pcre_uint8 classbits, pcre_uchar *uchardptr,
	int options, compile_data cd, const pcre_uint32 p)
/* Can't have \S in here because VT matches \S (Perl anomaly) */	{
case OP_ANYNL:	BOOL utf = (options & PCRE_UTF8) != 0;
case OP_VSPACE:	int n8 = 0;
return next == -ESC_V \|\| next == -ESC_d \|\| next == -ESC_w;	if (p[0] > 0)
	n8 += add_to_class(classbits, uchardptr, options, cd, 0, p[0] - 1);
case OP_NOT_VSPACE:	while (p[0] < NOTACHAR)
return next == -ESC_v \|\| next == -ESC_R;	{
	while (p[1] == p[0] + 1) p++;
case OP_WORDCHAR:	n8 += add_to_class(classbits, uchardptr, options, cd, p[0] + 1,
return next == -ESC_W \|\| next == -ESC_s \|\| next == -ESC_h \|\|	(p[1] == NOTACHAR) ? (utf ? 0x10ffffu : 0xffffffffu) : p[1] - 1);
next == -ESC_v \|\| next == -ESC_R;	p++;

case OP_NOT_WORDCHAR:
return next == -ESC_w \|\| next == -ESC_d;

default:
return FALSE;
}	}
	return n8;
/* Control does not reach here */
}	}


Line 3244 to find out the amount of memory needed, as well as du	Line 4328 to find out the amount of memory needed, as well as du
phase. The value of lengthptr distinguishes the two phases.	phase. The value of lengthptr distinguishes the two phases.

Arguments:	Arguments:
optionsptr pointer to the option bits	optionsptr pointer to the option bits
codeptr points to the pointer to the current code point	codeptr points to the pointer to the current code point
ptrptr points to the current pattern pointer	ptrptr points to the current pattern pointer
errorcodeptr points to error code variable	errorcodeptr points to error code variable
firstbyteptr set to initial literal character, or < 0 (REQ_UNSET, REQ_NONE)	firstcharptr place to put the first required character
reqbyteptr set to the last literal character required, else < 0	firstcharflagsptr place to put the first character flags, or a negative number
bcptr points to current branch chain	reqcharptr place to put the last required character
cond_depth conditional nesting depth	reqcharflagsptr place to put the last required character flags, or a negative number
cd contains pointers to tables etc.	bcptr points to current branch chain
lengthptr NULL during the real compile phase	cond_depth conditional nesting depth
points to length accumulator during pre-compile phase	cd contains pointers to tables etc.
	lengthptr NULL during the real compile phase
	points to length accumulator during pre-compile phase

Returns: TRUE on success	Returns: TRUE on success
FALSE, with *errorcodeptr set non-zero on error	FALSE, with *errorcodeptr set non-zero on error
*/	*/

static BOOL	static BOOL
compile_branch(int optionsptr, uschar codeptr, const uschar *ptrptr,	compile_branch(int optionsptr, pcre_uchar *codeptr,
int errorcodeptr, int firstbyteptr, int reqbyteptr, branch_chain bcptr,	const pcre_uchar *ptrptr, int errorcodeptr,
int cond_depth, compile_data cd, int lengthptr)	pcre_uint32 firstcharptr, pcre_int32 firstcharflagsptr,
	pcre_uint32 reqcharptr, pcre_int32 reqcharflagsptr,
	branch_chain *bcptr, int cond_depth,
	compile_data cd, int lengthptr)
{	{
int repeat_type, op_type;	int repeat_type, op_type;
int repeat_min = 0, repeat_max = 0; /* To please picky compilers */	int repeat_min = 0, repeat_max = 0; /* To please picky compilers */
int bravalue = 0;	int bravalue = 0;
int greedy_default, greedy_non_default;	int greedy_default, greedy_non_default;
int firstbyte, reqbyte;	pcre_uint32 firstchar, reqchar;
int zeroreqbyte, zerofirstbyte;	pcre_int32 firstcharflags, reqcharflags;
int req_caseopt, reqvary, tempreqvary;	pcre_uint32 zeroreqchar, zerofirstchar;
	pcre_int32 zeroreqcharflags, zerofirstcharflags;
	pcre_int32 req_caseopt, reqvary, tempreqvary;
int options = optionsptr; / May change dynamically */	int options = optionsptr; / May change dynamically */
int after_manual_callout = 0;	int after_manual_callout = 0;
int length_prevgroup = 0;	int length_prevgroup = 0;
register int c;	register pcre_uint32 c;
register uschar code = codeptr;	int escape;
uschar *last_code = code;	register pcre_uchar code = codeptr;
uschar *orig_code = code;	pcre_uchar *last_code = code;
uschar *tempcode;	pcre_uchar *orig_code = code;
	pcre_uchar *tempcode;
BOOL inescq = FALSE;	BOOL inescq = FALSE;
BOOL groupsetfirstbyte = FALSE;	BOOL groupsetfirstchar = FALSE;
const uschar ptr = ptrptr;	const pcre_uchar ptr = ptrptr;
const uschar *tempptr;	const pcre_uchar *tempptr;
const uschar *nestptr = NULL;	const pcre_uchar *nestptr = NULL;
uschar *previous = NULL;	pcre_uchar *previous = NULL;
uschar *previous_callout = NULL;	pcre_uchar *previous_callout = NULL;
uschar *save_hwm = NULL;	pcre_uchar *save_hwm = NULL;
uschar classbits[32];	pcre_uint8 classbits[32];

/* We can fish out the UTF-8 setting once and for all into a BOOL, but we	/* We can fish out the UTF-8 setting once and for all into a BOOL, but we
must not do this for other options (e.g. PCRE_EXTENDED) because they may change	must not do this for other options (e.g. PCRE_EXTENDED) because they may change
dynamically as we process the pattern. */	dynamically as we process the pattern. */

#ifdef SUPPORT_UTF8	#ifdef SUPPORT_UTF
BOOL class_utf8;	/* PCRE_UTF[16\|32] have the same value as PCRE_UTF8. */
BOOL utf8 = (options & PCRE_UTF8) != 0;	BOOL utf = (options & PCRE_UTF8) != 0;
uschar *class_utf8data;	#ifndef COMPILE_PCRE32
uschar *class_utf8data_base;	pcre_uchar utf_chars[6];
uschar utf8_char[6];	#endif
#else	#else
BOOL utf8 = FALSE;	BOOL utf = FALSE;
#endif	#endif

	/* Helper variables for OP_XCLASS opcode (for characters > 255). We define
	class_uchardata always so that it can be passed to add_to_class() always,
	though it will not be used in non-UTF 8-bit cases. This avoids having to supply
	alternative calls for the different cases. */

	pcre_uchar *class_uchardata;
	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
	BOOL xclass;
	pcre_uchar *class_uchardata_base;
	#endif

#ifdef PCRE_DEBUG	#ifdef PCRE_DEBUG
if (lengthptr != NULL) DPRINTF((">> start branch\n"));	if (lengthptr != NULL) DPRINTF((">> start branch\n"));
#endif	#endif
Line 3315 greedy_non_default = greedy_default ^ 1;	Line 4418 greedy_non_default = greedy_default ^ 1;

/* Initialize no first byte, no required byte. REQ_UNSET means "no char	/* Initialize no first byte, no required byte. REQ_UNSET means "no char
matching encountered yet". It gets changed to REQ_NONE if we hit something that	matching encountered yet". It gets changed to REQ_NONE if we hit something that
matches a non-fixed char first char; reqbyte just remains unset if we never	matches a non-fixed char first char; reqchar just remains unset if we never
find one.	find one.

When we hit a repeat whose minimum is zero, we may have to adjust these values	When we hit a repeat whose minimum is zero, we may have to adjust these values
to take the zero repeat into account. This is implemented by setting them to	to take the zero repeat into account. This is implemented by setting them to
zerofirstbyte and zeroreqbyte when such a repeat is encountered. The individual	zerofirstbyte and zeroreqchar when such a repeat is encountered. The individual
item types that can be repeated set these backoff variables appropriately. */	item types that can be repeated set these backoff variables appropriately. */

firstbyte = reqbyte = zerofirstbyte = zeroreqbyte = REQ_UNSET;	firstchar = reqchar = zerofirstchar = zeroreqchar = 0;
	firstcharflags = reqcharflags = zerofirstcharflags = zeroreqcharflags = REQ_UNSET;

/* The variable req_caseopt contains either the REQ_CASELESS value or zero,	/* The variable req_caseopt contains either the REQ_CASELESS value
according to the current setting of the caseless flag. REQ_CASELESS is a bit	or zero, according to the current setting of the caseless flag. The
value > 255. It is added into the firstbyte or reqbyte variables to record the	REQ_CASELESS leaves the lower 28 bit empty. It is added into the
case status of the value. This is used only for ASCII characters. */	firstchar or reqchar variables to record the case status of the
	value. This is used only for ASCII characters. */

req_caseopt = ((options & PCRE_CASELESS) != 0)? REQ_CASELESS : 0;	req_caseopt = ((options & PCRE_CASELESS) != 0)? REQ_CASELESS:0;

/* Switch on next character until the end of the branch */	/* Switch on next character until the end of the branch */

Line 3342 for (;; ptr++)	Line 4447 for (;; ptr++)
BOOL is_quantifier;	BOOL is_quantifier;
BOOL is_recurse;	BOOL is_recurse;
BOOL reset_bracount;	BOOL reset_bracount;
int class_charcount;	int class_has_8bitchar;
int class_lastchar;	int class_one_char;
int newoptions;	int newoptions;
int recno;	int recno;
int refsign;	int refsign;
int skipbytes;	int skipbytes;
int subreqbyte;	pcre_uint32 subreqchar, subfirstchar;
int subfirstbyte;	pcre_int32 subreqcharflags, subfirstcharflags;
int terminator;	int terminator;
int mclength;	unsigned int mclength;
int tempbracount;	unsigned int tempbracount;
uschar mcbuffer[8];	pcre_uint32 ec;
	pcre_uchar mcbuffer[8];

/* Get next byte in the pattern */	/* Get next character in the pattern */

c = *ptr;	c = *ptr;

/* If we are at the end of a nested substitution, revert to the outer level	/* If we are at the end of a nested substitution, revert to the outer level
string. Nesting only happens one level deep. */	string. Nesting only happens one level deep. */

if (c == 0 && nestptr != NULL)	if (c == CHAR_NULL && nestptr != NULL)
{	{
ptr = nestptr;	ptr = nestptr;
nestptr = NULL;	nestptr = NULL;
Line 3401 for (;; ptr++)	Line 4507 for (;; ptr++)
}	}

*lengthptr += (int)(code - last_code);	*lengthptr += (int)(code - last_code);
DPRINTF(("length=%d added %d c=%c\n", *lengthptr, (int)(code - last_code),	DPRINTF(("length=%d added %d c=%c (0x%x)\n", *lengthptr,
c));	(int)(code - last_code), c, c));

/* If "previous" is set and it is not at the start of the work space, move	/* If "previous" is set and it is not at the start of the work space, move
it back to there, in order to avoid filling up the work space. Otherwise,	it back to there, in order to avoid filling up the work space. Otherwise,
Line 3412 for (;; ptr++)	Line 4518 for (;; ptr++)
{	{
if (previous > orig_code)	if (previous > orig_code)
{	{
memmove(orig_code, previous, code - previous);	memmove(orig_code, previous, IN_UCHARS(code - previous));
code -= previous - orig_code;	code -= previous - orig_code;
previous = orig_code;	previous = orig_code;
}	}
Line 3437 for (;; ptr++)	Line 4543 for (;; ptr++)

/* If in \Q...\E, check for the end; if not, we have a literal */	/* If in \Q...\E, check for the end; if not, we have a literal */

if (inescq && c != 0)	if (inescq && c != CHAR_NULL)
{	{
if (c == CHAR_BACKSLASH && ptr[1] == CHAR_E)	if (c == CHAR_BACKSLASH && ptr[1] == CHAR_E)
{	{
Line 3460 for (;; ptr++)	Line 4566 for (;; ptr++)
}	}
goto NORMAL_CHAR;	goto NORMAL_CHAR;
}	}
	/* Control does not reach here. */
}	}

/* Fill in length of a previous callout, except when the next thing is	/* In extended mode, skip white space and comments. We need a loop in order
a quantifier. */	to check for more white space and more comments after a comment. */

is_quantifier =
c == CHAR_ASTERISK \|\| c == CHAR_PLUS \|\| c == CHAR_QUESTION_MARK \|\|
(c == CHAR_LEFT_CURLY_BRACKET && is_counted_repeat(ptr+1));

if (!is_quantifier && previous_callout != NULL &&
after_manual_callout-- <= 0)
{
if (lengthptr == NULL) /* Don't attempt in pre-compile phase */
complete_callout(previous_callout, ptr, cd);
previous_callout = NULL;
}

/* In extended mode, skip white space and comments. */

if ((options & PCRE_EXTENDED) != 0)	if ((options & PCRE_EXTENDED) != 0)
{	{
if ((cd->ctypes[c] & ctype_space) != 0) continue;	for (;;)
if (c == CHAR_NUMBER_SIGN)
{	{
	while (MAX_255(c) && (cd->ctypes[c] & ctype_space) != 0) c = *(++ptr);
	if (c != CHAR_NUMBER_SIGN) break;
ptr++;	ptr++;
while (*ptr != 0)	while (*ptr != CHAR_NULL)
{	{
if (IS_NEWLINE(ptr)) { ptr += cd->nllen - 1; break; }	if (IS_NEWLINE(ptr)) /* For non-fixed-length newline cases, */
	{ /* IS_NEWLINE sets cd->nllen. */
	ptr += cd->nllen;
	break;
	}
ptr++;	ptr++;
#ifdef SUPPORT_UTF8	#ifdef SUPPORT_UTF
if (utf8) while ((*ptr & 0xc0) == 0x80) ptr++;	if (utf) FORWARDCHAR(ptr);
#endif	#endif
}	}
if (*ptr != 0) continue;	c = ptr; / Either NULL or the char after a newline */

/* Else fall through to handle end of string */
c = 0;
}	}
}	}

/* No auto callout for quantifiers. */	/* See if the next thing is a quantifier. */

if ((options & PCRE_AUTO_CALLOUT) != 0 && !is_quantifier)	is_quantifier =
	c == CHAR_ASTERISK \|\| c == CHAR_PLUS \|\| c == CHAR_QUESTION_MARK \|\|
	(c == CHAR_LEFT_CURLY_BRACKET && is_counted_repeat(ptr+1));

	/* Fill in length of a previous callout, except when the next thing is a
	quantifier or when processing a property substitution string in UCP mode. */

	if (!is_quantifier && previous_callout != NULL && nestptr == NULL &&
	after_manual_callout-- <= 0)
{	{
	if (lengthptr == NULL) /* Don't attempt in pre-compile phase */
	complete_callout(previous_callout, ptr, cd);
	previous_callout = NULL;
	}

	/* Create auto callout, except for quantifiers, or while processing property
	strings that are substituted for \w etc in UCP mode. */

	if ((options & PCRE_AUTO_CALLOUT) != 0 && !is_quantifier && nestptr == NULL)
	{
previous_callout = code;	previous_callout = code;
code = auto_callout(code, ptr, cd);	code = auto_callout(code, ptr, cd);
}	}

	/* Process the next pattern item. */

switch(c)	switch(c)
{	{
/* ===================================================================*/	/* ===================================================================*/
case 0: /* The branch terminates at string end */	case CHAR_NULL: /* The branch terminates at string end */
case CHAR_VERTICAL_LINE: /* or \| or ) */	case CHAR_VERTICAL_LINE: /* or \| or ) */
case CHAR_RIGHT_PARENTHESIS:	case CHAR_RIGHT_PARENTHESIS:
*firstbyteptr = firstbyte;	*firstcharptr = firstchar;
*reqbyteptr = reqbyte;	*firstcharflagsptr = firstcharflags;
	*reqcharptr = reqchar;
	*reqcharflagsptr = reqcharflags;
*codeptr = code;	*codeptr = code;
*ptrptr = ptr;	*ptrptr = ptr;
if (lengthptr != NULL)	if (lengthptr != NULL)
Line 3539 for (;; ptr++)	Line 4656 for (;; ptr++)
previous = NULL;	previous = NULL;
if ((options & PCRE_MULTILINE) != 0)	if ((options & PCRE_MULTILINE) != 0)
{	{
if (firstbyte == REQ_UNSET) firstbyte = REQ_NONE;	if (firstcharflags == REQ_UNSET) firstcharflags = REQ_NONE;
*code++ = OP_CIRCM;	*code++ = OP_CIRCM;
}	}
else *code++ = OP_CIRC;	else *code++ = OP_CIRC;
Line 3551 for (;; ptr++)	Line 4668 for (;; ptr++)
break;	break;

/* There can never be a first char if '.' is first, whatever happens about	/* There can never be a first char if '.' is first, whatever happens about
repeats. The value of reqbyte doesn't change either. */	repeats. The value of reqchar doesn't change either. */

case CHAR_DOT:	case CHAR_DOT:
if (firstbyte == REQ_UNSET) firstbyte = REQ_NONE;	if (firstcharflags == REQ_UNSET) firstcharflags = REQ_NONE;
zerofirstbyte = firstbyte;	zerofirstchar = firstchar;
zeroreqbyte = reqbyte;	zerofirstcharflags = firstcharflags;
	zeroreqchar = reqchar;
	zeroreqcharflags = reqcharflags;
previous = code;	previous = code;
*code++ = ((options & PCRE_DOTALL) != 0)? OP_ALLANY: OP_ANY;	*code++ = ((options & PCRE_DOTALL) != 0)? OP_ALLANY: OP_ANY;
break;	break;
Line 3585 for (;; ptr++)	Line 4704 for (;; ptr++)
}	}
goto NORMAL_CHAR;	goto NORMAL_CHAR;

	/* In another (POSIX) regex library, the ugly syntax [[:<:]] and [[:>:]] is
	used for "start of word" and "end of word". As these are otherwise illegal
	sequences, we don't break anything by recognizing them. They are replaced
	by \b(?=\w) and \b(?<=\w) respectively. Sequences like [a[:<:]] are
	erroneous and are handled by the normal code below. */

case CHAR_LEFT_SQUARE_BRACKET:	case CHAR_LEFT_SQUARE_BRACKET:
	if (STRNCMP_UC_C8(ptr+1, STRING_WEIRD_STARTWORD, 6) == 0)
	{
	nestptr = ptr + 7;
	ptr = sub_start_of_word - 1;
	continue;
	}

	if (STRNCMP_UC_C8(ptr+1, STRING_WEIRD_ENDWORD, 6) == 0)
	{
	nestptr = ptr + 7;
	ptr = sub_end_of_word - 1;
	continue;
	}

	/* Handle a real character class. */

previous = code;	previous = code;

/* PCRE supports POSIX class stuff inside a class. Perl gives an error if	/* PCRE supports POSIX class stuff inside a class. Perl gives an error if
Line 3611 for (;; ptr++)	Line 4752 for (;; ptr++)
{	{
if (ptr[1] == CHAR_E)	if (ptr[1] == CHAR_E)
ptr++;	ptr++;
else if (strncmp((const char *)ptr+1,	else if (STRNCMP_UC_C8(ptr + 1, STR_Q STR_BACKSLASH STR_E, 3) == 0)
STR_Q STR_BACKSLASH STR_E, 3) == 0)
ptr += 3;	ptr += 3;
else	else
break;	break;
Line 3631 for (;; ptr++)	Line 4771 for (;; ptr++)
(cd->external_options & PCRE_JAVASCRIPT_COMPAT) != 0)	(cd->external_options & PCRE_JAVASCRIPT_COMPAT) != 0)
{	{
*code++ = negate_class? OP_ALLANY : OP_FAIL;	*code++ = negate_class? OP_ALLANY : OP_FAIL;
if (firstbyte == REQ_UNSET) firstbyte = REQ_NONE;	if (firstcharflags == REQ_UNSET) firstcharflags = REQ_NONE;
zerofirstbyte = firstbyte;	zerofirstchar = firstchar;
	zerofirstcharflags = firstcharflags;
break;	break;
}	}

Line 3642 for (;; ptr++)	Line 4783 for (;; ptr++)

should_flip_negation = FALSE;	should_flip_negation = FALSE;

/* Keep a count of chars with values < 256 so that we can optimize the case	/* For optimization purposes, we track some properties of the class:
of just a single character (as long as it's < 256). However, For higher	class_has_8bitchar will be non-zero if the class contains at least one <
valued UTF-8 characters, we don't yet do any optimization. */	256 character; class_one_char will be 1 if the class contains just one
	character. */

class_charcount = 0;	class_has_8bitchar = 0;
class_lastchar = -1;	class_one_char = 0;

/* Initialize the 32-char bit map to all zeros. We build the map in a	/* Initialize the 32-char bit map to all zeros. We build the map in a
temporary bit of memory, in case the class contains only 1 character (less	temporary bit of memory, in case the class contains fewer than two
than 256), because in that case the compiled code doesn't use the bit map.	8-bit characters because in that case the compiled code doesn't use the bit
*/	map. */

memset(classbits, 0, 32 * sizeof(uschar));	memset(classbits, 0, 32 * sizeof(pcre_uint8));

#ifdef SUPPORT_UTF8	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
class_utf8 = FALSE; /* No chars >= 256 */	xclass = FALSE;
class_utf8data = code + LINK_SIZE + 2; /* For UTF-8 items */	class_uchardata = code + LINK_SIZE + 2; /* For XCLASS items */
class_utf8data_base = class_utf8data; /* For resetting in pass 1 */	class_uchardata_base = class_uchardata; /* Save the start */
#endif	#endif

/* Process characters until ] is reached. By writing this as a "do" it	/* Process characters until ] is reached. By writing this as a "do" it
means that an initial ] is taken as a data character. At the start of the	means that an initial ] is taken as a data character. At the start of the
loop, c contains the first byte of the character. */	loop, c contains the first byte of the character. */

if (c != 0) do	if (c != CHAR_NULL) do
{	{
const uschar *oldptr;	const pcre_uchar *oldptr;

#ifdef SUPPORT_UTF8	#ifdef SUPPORT_UTF
if (utf8 && c > 127)	if (utf && HAS_EXTRALEN(c))
{ /* Braces are required because the */	{ /* Braces are required because the */
GETCHARLEN(c, ptr, ptr); /* macro generates multiple statements */	GETCHARLEN(c, ptr, ptr); /* macro generates multiple statements */
}	}
	#endif

/* In the pre-compile phase, accumulate the length of any UTF-8 extra	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
	/* In the pre-compile phase, accumulate the length of any extra
data and reset the pointer. This is so that very large classes that	data and reset the pointer. This is so that very large classes that
contain a zillion UTF-8 characters no longer overwrite the work space	contain a zillion > 255 characters no longer overwrite the work space
(which is on the stack). */	(which is on the stack). We have to remember that there was XCLASS data,
	however. */

if (lengthptr != NULL)	if (lengthptr != NULL && class_uchardata > class_uchardata_base)
{	{
*lengthptr += (int)(class_utf8data - class_utf8data_base);	xclass = TRUE;
class_utf8data = class_utf8data_base;	*lengthptr += class_uchardata - class_uchardata_base;
	class_uchardata = class_uchardata_base;
}	}

#endif	#endif

/* Inside \Q...\E everything is literal except \E */	/* Inside \Q...\E everything is literal except \E */
Line 3714 for (;; ptr++)	Line 4859 for (;; ptr++)
{	{
BOOL local_negate = FALSE;	BOOL local_negate = FALSE;
int posix_class, taboffset, tabopt;	int posix_class, taboffset, tabopt;
register const uschar *cbits = cd->cbits;	register const pcre_uint8 *cbits = cd->cbits;
uschar pbits[32];	pcre_uint8 pbits[32];

if (ptr[1] != CHAR_COLON)	if (ptr[1] != CHAR_COLON)
{	{
Line 3746 for (;; ptr++)	Line 4891 for (;; ptr++)
posix_class = 0;	posix_class = 0;

/* When PCRE_UCP is set, some of the POSIX classes are converted to	/* When PCRE_UCP is set, some of the POSIX classes are converted to
different escape sequences that use Unicode properties. */	different escape sequences that use Unicode properties \p or \P. Others
	that are not available via \p or \P generate XCL_PROP/XCL_NOTPROP
	directly. */

#ifdef SUPPORT_UCP	#ifdef SUPPORT_UCP
if ((options & PCRE_UCP) != 0)	if ((options & PCRE_UCP) != 0)
{	{
	unsigned int ptype = 0;
int pc = posix_class + ((local_negate)? POSIX_SUBSIZE/2 : 0);	int pc = posix_class + ((local_negate)? POSIX_SUBSIZE/2 : 0);

	/* The posix_substitutes table specifies which POSIX classes can be
	converted to \p or \P items. */

if (posix_substitutes[pc] != NULL)	if (posix_substitutes[pc] != NULL)
{	{
nestptr = tempptr + 1;	nestptr = tempptr + 1;
ptr = posix_substitutes[pc] - 1;	ptr = posix_substitutes[pc] - 1;
continue;	continue;
}	}

	/* There are three other classes that generate special property calls
	that are recognized only in an XCLASS. */

	else switch(posix_class)
	{
	case PC_GRAPH:
	ptype = PT_PXGRAPH;
	/* Fall through */
	case PC_PRINT:
	if (ptype == 0) ptype = PT_PXPRINT;
	/* Fall through */
	case PC_PUNCT:
	if (ptype == 0) ptype = PT_PXPUNCT;
	*class_uchardata++ = local_negate? XCL_NOTPROP : XCL_PROP;
	*class_uchardata++ = ptype;
	*class_uchardata++ = 0;
	ptr = tempptr + 1;
	continue;

	/* For all other POSIX classes, no special action is taken in UCP
	mode. Fall through to the non_UCP case. */

	default:
	break;
	}
}	}
#endif	#endif
/* In the non-UCP case, we build the bit map for the POSIX class in a	/* In the non-UCP case, or when UCP makes no difference, we build the
chunk of local store because we may be adding and subtracting from it,	bit map for the POSIX class in a chunk of local store because we may be
and we don't want to subtract bits that may be in the main map already.	adding and subtracting from it, and we don't want to subtract bits that
At the end we or the result into the bit map that is being built. */	may be in the main map already. At the end we or the result into the
	bit map that is being built. */

posix_class *= 3;	posix_class *= 3;

/* Copy in the first table (always present) */	/* Copy in the first table (always present) */

memcpy(pbits, cbits + posix_class_maps[posix_class],	memcpy(pbits, cbits + posix_class_maps[posix_class],
32 * sizeof(uschar));	32 * sizeof(pcre_uint8));

/* If there is a second table, add or remove it as required. */	/* If there is a second table, add or remove it as required. */

Line 3785 for (;; ptr++)	Line 4964 for (;; ptr++)
for (c = 0; c < 32; c++) pbits[c] &= ~cbits[c + taboffset];	for (c = 0; c < 32; c++) pbits[c] &= ~cbits[c + taboffset];
}	}

/* Not see if we need to remove any special characters. An option	/* Now see if we need to remove any special characters. An option
value of 1 removes vertical space and 2 removes underscore. */	value of 1 removes vertical space and 2 removes underscore. */

if (tabopt < 0) tabopt = -tabopt;	if (tabopt < 0) tabopt = -tabopt;
Line 3801 for (;; ptr++)	Line 4980 for (;; ptr++)
for (c = 0; c < 32; c++) classbits[c] \|= pbits[c];	for (c = 0; c < 32; c++) classbits[c] \|= pbits[c];

ptr = tempptr + 1;	ptr = tempptr + 1;
class_charcount = 10; /* Set > 1; assumes more than 1 per class */	/* Every class contains at least one < 256 character. */
	class_has_8bitchar = 1;
	/* Every class contains at least two characters. */
	class_one_char = 2;
continue; /* End of POSIX syntax handling */	continue; /* End of POSIX syntax handling */
}	}

/* Backslash may introduce a single character, or it may introduce one	/* Backslash may introduce a single character, or it may introduce one
of the specials, which just set a flag. The sequence \b is a special	of the specials, which just set a flag. The sequence \b is a special
case. Inside a class (and only there) it is treated as backspace. We	case. Inside a class (and only there) it is treated as backspace. We
assume that other escapes have more than one character in them, so set	assume that other escapes have more than one character in them, so
class_charcount bigger than one. Unrecognized escapes fall through and	speculatively set both class_has_8bitchar and class_one_char bigger
are either treated as literal characters (by default), or are faulted if	than one. Unrecognized escapes fall through and are either treated
	as literal characters (by default), or are faulted if
PCRE_EXTRA is set. */	PCRE_EXTRA is set. */

if (c == CHAR_BACKSLASH)	if (c == CHAR_BACKSLASH)
{	{
c = check_escape(&ptr, errorcodeptr, cd->bracount, options, TRUE);	escape = check_escape(&ptr, &ec, errorcodeptr, cd->bracount, options,
	TRUE);
if (*errorcodeptr != 0) goto FAILED;	if (*errorcodeptr != 0) goto FAILED;
	if (escape == 0) c = ec;
if (-c == ESC_b) c = CHAR_BS; /* \b is backspace in a class */	else if (escape == ESC_b) c = CHAR_BS; /* \b is backspace in a class */
else if (-c == ESC_N) /* \N is not supported in a class */	else if (escape == ESC_N) /* \N is not supported in a class */
{	{
*errorcodeptr = ERR71;	*errorcodeptr = ERR71;
goto FAILED;	goto FAILED;
}	}
else if (-c == ESC_Q) /* Handle start of quoted string */	else if (escape == ESC_Q) /* Handle start of quoted string */
{	{
if (ptr[1] == CHAR_BACKSLASH && ptr[2] == CHAR_E)	if (ptr[1] == CHAR_BACKSLASH && ptr[2] == CHAR_E)
{	{
Line 3833 for (;; ptr++)	Line 5017 for (;; ptr++)
else inescq = TRUE;	else inescq = TRUE;
continue;	continue;
}	}
else if (-c == ESC_E) continue; /* Ignore orphan \E */	else if (escape == ESC_E) continue; /* Ignore orphan \E */

if (c < 0)	else
{	{
register const uschar *cbits = cd->cbits;	register const pcre_uint8 *cbits = cd->cbits;
class_charcount += 2; /* Greater than 1 is what matters */	/* Every class contains at least two < 256 characters. */
	class_has_8bitchar++;
	/* Every class contains at least two characters. */
	class_one_char += 2;

switch (-c)	switch (escape)
{	{
#ifdef SUPPORT_UCP	#ifdef SUPPORT_UCP
case ESC_du: /* These are the values given for \d etc */	case ESC_du: /* These are the values given for \d etc */
Line 3850 for (;; ptr++)	Line 5037 for (;; ptr++)
case ESC_su: /* of the default ASCII testing. */	case ESC_su: /* of the default ASCII testing. */
case ESC_SU:	case ESC_SU:
nestptr = ptr;	nestptr = ptr;
ptr = substitutes[-c - ESC_DU] - 1; /* Just before substitute */	ptr = substitutes[escape - ESC_DU] - 1; /* Just before substitute */
class_charcount -= 2; /* Undo! */	class_has_8bitchar--; /* Undo! */
continue;	continue;
#endif	#endif
case ESC_d:	case ESC_d:
Line 3872 for (;; ptr++)	Line 5059 for (;; ptr++)
for (c = 0; c < 32; c++) classbits[c] \|= ~cbits[c+cbit_word];	for (c = 0; c < 32; c++) classbits[c] \|= ~cbits[c+cbit_word];
continue;	continue;

/* Perl 5.004 onwards omits VT from \s, but we must preserve it	/* Perl 5.004 onwards omitted VT from \s, but restored it at Perl
if it was previously set by something earlier in the character	5.18. Before PCRE 8.34, we had to preserve the VT bit if it was
class. */	previously set by something earlier in the character class.
	Luckily, the value of CHAR_VT is 0x0b in both ASCII and EBCDIC, so
	we could just adjust the appropriate bit. From PCRE 8.34 we no
	longer treat \s and \S specially. */

case ESC_s:	case ESC_s:
classbits[0] \|= cbits[cbit_space];	for (c = 0; c < 32; c++) classbits[c] \|= cbits[c+cbit_space];
classbits[1] \|= cbits[cbit_space+1] & ~0x08;
for (c = 2; c < 32; c++) classbits[c] \|= cbits[c+cbit_space];
continue;	continue;

case ESC_S:	case ESC_S:
should_flip_negation = TRUE;	should_flip_negation = TRUE;
for (c = 0; c < 32; c++) classbits[c] \|= ~cbits[c+cbit_space];	for (c = 0; c < 32; c++) classbits[c] \|= ~cbits[c+cbit_space];
classbits[1] \|= 0x08; /* Perl 5.004 onwards omits VT from \s */
continue;	continue;

	/* The rest apply in both UCP and non-UCP cases. */

case ESC_h:	case ESC_h:
SETBIT(classbits, 0x09); /* VT */	(void)add_list_to_class(classbits, &class_uchardata, options, cd,
SETBIT(classbits, 0x20); /* SPACE */	PRIV(hspace_list), NOTACHAR);
SETBIT(classbits, 0xa0); /* NSBP */
#ifdef SUPPORT_UTF8
if (utf8)
{
class_utf8 = TRUE;
*class_utf8data++ = XCL_SINGLE;
class_utf8data += _pcre_ord2utf8(0x1680, class_utf8data);
*class_utf8data++ = XCL_SINGLE;
class_utf8data += _pcre_ord2utf8(0x180e, class_utf8data);
*class_utf8data++ = XCL_RANGE;
class_utf8data += _pcre_ord2utf8(0x2000, class_utf8data);
class_utf8data += _pcre_ord2utf8(0x200A, class_utf8data);
*class_utf8data++ = XCL_SINGLE;
class_utf8data += _pcre_ord2utf8(0x202f, class_utf8data);
*class_utf8data++ = XCL_SINGLE;
class_utf8data += _pcre_ord2utf8(0x205f, class_utf8data);
*class_utf8data++ = XCL_SINGLE;
class_utf8data += _pcre_ord2utf8(0x3000, class_utf8data);
}
#endif
continue;	continue;

case ESC_H:	case ESC_H:
for (c = 0; c < 32; c++)	(void)add_not_list_to_class(classbits, &class_uchardata, options,
{	cd, PRIV(hspace_list));
int x = 0xff;
switch (c)
{
case 0x09/8: x ^= 1 << (0x09%8); break;
case 0x20/8: x ^= 1 << (0x20%8); break;
case 0xa0/8: x ^= 1 << (0xa0%8); break;
default: break;
}
classbits[c] \|= x;
}

#ifdef SUPPORT_UTF8
if (utf8)
{
class_utf8 = TRUE;
*class_utf8data++ = XCL_RANGE;
class_utf8data += _pcre_ord2utf8(0x0100, class_utf8data);
class_utf8data += _pcre_ord2utf8(0x167f, class_utf8data);
*class_utf8data++ = XCL_RANGE;
class_utf8data += _pcre_ord2utf8(0x1681, class_utf8data);
class_utf8data += _pcre_ord2utf8(0x180d, class_utf8data);
*class_utf8data++ = XCL_RANGE;
class_utf8data += _pcre_ord2utf8(0x180f, class_utf8data);
class_utf8data += _pcre_ord2utf8(0x1fff, class_utf8data);
*class_utf8data++ = XCL_RANGE;
class_utf8data += _pcre_ord2utf8(0x200B, class_utf8data);
class_utf8data += _pcre_ord2utf8(0x202e, class_utf8data);
*class_utf8data++ = XCL_RANGE;
class_utf8data += _pcre_ord2utf8(0x2030, class_utf8data);
class_utf8data += _pcre_ord2utf8(0x205e, class_utf8data);
*class_utf8data++ = XCL_RANGE;
class_utf8data += _pcre_ord2utf8(0x2060, class_utf8data);
class_utf8data += _pcre_ord2utf8(0x2fff, class_utf8data);
*class_utf8data++ = XCL_RANGE;
class_utf8data += _pcre_ord2utf8(0x3001, class_utf8data);
class_utf8data += _pcre_ord2utf8(0x7fffffff, class_utf8data);
}
#endif
continue;	continue;

case ESC_v:	case ESC_v:
SETBIT(classbits, 0x0a); /* LF */	(void)add_list_to_class(classbits, &class_uchardata, options, cd,
SETBIT(classbits, 0x0b); /* VT */	PRIV(vspace_list), NOTACHAR);
SETBIT(classbits, 0x0c); /* FF */
SETBIT(classbits, 0x0d); /* CR */
SETBIT(classbits, 0x85); /* NEL */
#ifdef SUPPORT_UTF8
if (utf8)
{
class_utf8 = TRUE;
*class_utf8data++ = XCL_RANGE;
class_utf8data += _pcre_ord2utf8(0x2028, class_utf8data);
class_utf8data += _pcre_ord2utf8(0x2029, class_utf8data);
}
#endif
continue;	continue;

case ESC_V:	case ESC_V:
for (c = 0; c < 32; c++)	(void)add_not_list_to_class(classbits, &class_uchardata, options,
{	cd, PRIV(vspace_list));
int x = 0xff;
switch (c)
{
case 0x0a/8: x ^= 1 << (0x0a%8);
x ^= 1 << (0x0b%8);
x ^= 1 << (0x0c%8);
x ^= 1 << (0x0d%8);
break;
case 0x85/8: x ^= 1 << (0x85%8); break;
default: break;
}
classbits[c] \|= x;
}

#ifdef SUPPORT_UTF8
if (utf8)
{
class_utf8 = TRUE;
*class_utf8data++ = XCL_RANGE;
class_utf8data += _pcre_ord2utf8(0x0100, class_utf8data);
class_utf8data += _pcre_ord2utf8(0x2027, class_utf8data);
*class_utf8data++ = XCL_RANGE;
class_utf8data += _pcre_ord2utf8(0x2029, class_utf8data);
class_utf8data += _pcre_ord2utf8(0x7fffffff, class_utf8data);
}
#endif
continue;	continue;

#ifdef SUPPORT_UCP	#ifdef SUPPORT_UCP
Line 4009 for (;; ptr++)	Line 5102 for (;; ptr++)
case ESC_P:	case ESC_P:
{	{
BOOL negated;	BOOL negated;
int pdata;	unsigned int ptype = 0, pdata = 0;
int ptype = get_ucp(&ptr, &negated, &pdata, errorcodeptr);	if (!get_ucp(&ptr, &negated, &ptype, &pdata, errorcodeptr))
if (ptype < 0) goto FAILED;	goto FAILED;
class_utf8 = TRUE;	*class_uchardata++ = ((escape == ESC_p) != negated)?
*class_utf8data++ = ((-c == ESC_p) != negated)?
XCL_PROP : XCL_NOTPROP;	XCL_PROP : XCL_NOTPROP;
*class_utf8data++ = ptype;	*class_uchardata++ = ptype;
*class_utf8data++ = pdata;	*class_uchardata++ = pdata;
class_charcount -= 2; /* Not a < 256 character */	class_has_8bitchar--; /* Undo! */
continue;	continue;
}	}
#endif	#endif
Line 4031 for (;; ptr++)	Line 5123 for (;; ptr++)
*errorcodeptr = ERR7;	*errorcodeptr = ERR7;
goto FAILED;	goto FAILED;
}	}
class_charcount -= 2; /* Undo the default count from above */	class_has_8bitchar--; /* Undo the speculative increase. */
c = ptr; / Get the final character and fall through */	class_one_char -= 2; /* Undo the speculative increase. */
	c = ptr; / Get the final character and fall through */
break;	break;
}	}
}	}

/* Fall through if we have a single character (c >= 0). This may be	/* Fall through if the escape just defined a single character (c >= 0).
greater than 256 in UTF-8 mode. */	This may be greater than 256. */

	escape = 0;

} /* End of backslash handling */	} /* End of backslash handling */

/* A single character may be followed by '-' to form a range. However,	/* A character may be followed by '-' to form a range. However, Perl does
Perl does not permit ']' to be the end of the range. A '-' character	not permit ']' to be the end of the range. A '-' character at the end is
at the end is treated as a literal. Perl ignores orphaned \E sequences	treated as a literal. Perl ignores orphaned \E sequences entirely. The
entirely. The code for handling \Q and \E is messy. */	code for handling \Q and \E is messy. */

CHECK_RANGE:	CHECK_RANGE:
while (ptr[1] == CHAR_BACKSLASH && ptr[2] == CHAR_E)	while (ptr[1] == CHAR_BACKSLASH && ptr[2] == CHAR_E)
Line 4053 for (;; ptr++)	Line 5148 for (;; ptr++)
inescq = FALSE;	inescq = FALSE;
ptr += 2;	ptr += 2;
}	}

oldptr = ptr;	oldptr = ptr;

/* Remember \r or \n */	/* Remember if \r or \n were explicitly used */

if (c == CHAR_CR \|\| c == CHAR_NL) cd->external_flags \|= PCRE_HASCRORLF;	if (c == CHAR_CR \|\| c == CHAR_NL) cd->external_flags \|= PCRE_HASCRORLF;

Line 4064 for (;; ptr++)	Line 5158 for (;; ptr++)

if (!inescq && ptr[1] == CHAR_MINUS)	if (!inescq && ptr[1] == CHAR_MINUS)
{	{
int d;	pcre_uint32 d;
ptr += 2;	ptr += 2;
while (*ptr == CHAR_BACKSLASH && ptr[1] == CHAR_E) ptr += 2;	while (*ptr == CHAR_BACKSLASH && ptr[1] == CHAR_E) ptr += 2;

Line 4080 for (;; ptr++)	Line 5174 for (;; ptr++)
break;	break;
}	}

if (ptr == 0 \|\| (!inescq && ptr == CHAR_RIGHT_SQUARE_BRACKET))	/* Minus (hyphen) at the end of a class is treated as a literal, so put
	back the pointer and jump to handle the character that preceded it. */

	if (ptr == CHAR_NULL \|\| (!inescq && ptr == CHAR_RIGHT_SQUARE_BRACKET))
{	{
ptr = oldptr;	ptr = oldptr;
goto LONE_SINGLE_CHARACTER;	goto CLASS_SINGLE_CHARACTER;
}	}

#ifdef SUPPORT_UTF8	/* Otherwise, we have a potential range; pick up the next character */
if (utf8)
	#ifdef SUPPORT_UTF
	if (utf)
{ /* Braces are required because the */	{ /* Braces are required because the */
GETCHARLEN(d, ptr, ptr); /* macro generates multiple statements */	GETCHARLEN(d, ptr, ptr); /* macro generates multiple statements */
}	}
Line 4095 for (;; ptr++)	Line 5194 for (;; ptr++)
#endif	#endif
d = ptr; / Not UTF-8 mode */	d = ptr; / Not UTF-8 mode */

/* The second part of a range can be a single-character escape, but	/* The second part of a range can be a single-character escape
not any of the other escapes. Perl 5.6 treats a hyphen as a literal	sequence, but not any of the other escapes. Perl treats a hyphen as a
in such circumstances. */	literal in such circumstances. However, in Perl's warning mode, a
	warning is given, so PCRE now faults it as it is almost certainly a
	mistake on the user's part. */

if (!inescq && d == CHAR_BACKSLASH)	if (!inescq)
{	{
d = check_escape(&ptr, errorcodeptr, cd->bracount, options, TRUE);	if (d == CHAR_BACKSLASH)
if (*errorcodeptr != 0) goto FAILED;	{
	int descape;
	descape = check_escape(&ptr, &d, errorcodeptr, cd->bracount, options, TRUE);
	if (*errorcodeptr != 0) goto FAILED;

/* \b is backspace; any other special means the '-' was literal */	/* 0 means a character was put into d; \b is backspace; any other
	special causes an error. */

if (d < 0)	if (descape != 0)
{
if (d == -ESC_b) d = CHAR_BS; else
{	{
ptr = oldptr;	if (descape == ESC_b) d = CHAR_BS; else
goto LONE_SINGLE_CHARACTER; /* A few lines below */	{
	*errorcodeptr = ERR83;
	goto FAILED;
	}
}	}
}	}

	/* A hyphen followed by a POSIX class is treated in the same way. */

	else if (d == CHAR_LEFT_SQUARE_BRACKET &&
	(ptr[1] == CHAR_COLON \|\| ptr[1] == CHAR_DOT \|\|
	ptr[1] == CHAR_EQUALS_SIGN) &&
	check_posix_syntax(ptr, &tempptr))
	{
	*errorcodeptr = ERR83;
	goto FAILED;
	}
}	}

/* Check that the two values are in the correct order. Optimize	/* Check that the two values are in the correct order. Optimize
one-character ranges */	one-character ranges. */

if (d < c)	if (d < c)
{	{
*errorcodeptr = ERR8;	*errorcodeptr = ERR8;
goto FAILED;	goto FAILED;
}	}
	if (d == c) goto CLASS_SINGLE_CHARACTER; /* A few lines below */

if (d == c) goto LONE_SINGLE_CHARACTER; /* A few lines below */	/* We have found a character range, so single character optimizations
	cannot be done anymore. Any value greater than 1 indicates that there
	is more than one character. */

/* Remember \r or \n */	class_one_char = 2;

	/* Remember an explicit \r or \n, and add the range to the class. */

if (d == CHAR_CR \|\| d == CHAR_NL) cd->external_flags \|= PCRE_HASCRORLF;	if (d == CHAR_CR \|\| d == CHAR_NL) cd->external_flags \|= PCRE_HASCRORLF;

/* In UTF-8 mode, if the upper limit is > 255, or > 127 for caseless	class_has_8bitchar +=
matching, we have to use an XCLASS with extra data items. Caseless	add_to_class(classbits, &class_uchardata, options, cd, c, d);
matching for characters > 127 is available only if UCP support is
available. */

#ifdef SUPPORT_UTF8	continue; /* Go get the next char in the class */
if (utf8 && (d > 255 \|\| ((options & PCRE_CASELESS) != 0 && d > 127)))	}
{
class_utf8 = TRUE;

/* With UCP support, we can find the other case equivalents of	/* Handle a single character - we can get here for a normal non-escape
the relevant characters. There may be several ranges. Optimize how	char, or after \ that introduces a single character or for an apparent
they fit with the basic range. */	range that isn't. Only the value 1 matters for class_one_char, so don't
	increase it if it is already 2 or more ... just in case there's a class
	with a zillion characters in it. */

#ifdef SUPPORT_UCP	CLASS_SINGLE_CHARACTER:
if ((options & PCRE_CASELESS) != 0)	if (class_one_char < 2) class_one_char++;
{
unsigned int occ, ocd;
unsigned int cc = c;
unsigned int origd = d;
while (get_othercase_range(&cc, origd, &occ, &ocd))
{
if (occ >= (unsigned int)c &&
ocd <= (unsigned int)d)
continue; /* Skip embedded ranges */

if (occ < (unsigned int)c &&	/* If class_one_char is 1, we have the first single character in the
ocd >= (unsigned int)c - 1) /* Extend the basic range */	class, and there have been no prior ranges, or XCLASS items generated by
{ /* if there is overlap, */	escapes. If this is the final character in the class, we can optimize by
c = occ; /* noting that if occ < c */	turning the item into a 1-character OP_CHAR[I] if it's positive, or
continue; /* we can't have ocd > d */	OP_NOT[I] if it's negative. In the positive case, it can cause firstchar
} /* because a subrange is */	to be set. Otherwise, there can be no first char if this item is first,
if (ocd > (unsigned int)d &&	whatever repeat count may follow. In the case of reqchar, save the
occ <= (unsigned int)d + 1) /* always shorter than */	previous value for reinstating. */
{ /* the basic range. */
d = ocd;
continue;
}

if (occ == ocd)	if (class_one_char == 1 && ptr[1] == CHAR_RIGHT_SQUARE_BRACKET)
{	{
*class_utf8data++ = XCL_SINGLE;	ptr++;
}	zeroreqchar = reqchar;
else	zeroreqcharflags = reqcharflags;
{
*class_utf8data++ = XCL_RANGE;
class_utf8data += _pcre_ord2utf8(occ, class_utf8data);
}
class_utf8data += _pcre_ord2utf8(ocd, class_utf8data);
}
}
#endif /* SUPPORT_UCP */

/* Now record the original range, possibly modified for UCP caseless	if (negate_class)
overlapping ranges. */	{
	#ifdef SUPPORT_UCP
	int d;
	#endif
	if (firstcharflags == REQ_UNSET) firstcharflags = REQ_NONE;
	zerofirstchar = firstchar;
	zerofirstcharflags = firstcharflags;

*class_utf8data++ = XCL_RANGE;	/* For caseless UTF-8 mode when UCP support is available, check
class_utf8data += _pcre_ord2utf8(c, class_utf8data);	whether this character has more than one other case. If so, generate
class_utf8data += _pcre_ord2utf8(d, class_utf8data);	a special OP_NOTPROP item instead of OP_NOTI. */

/* With UCP support, we are done. Without UCP support, there is no
caseless matching for UTF-8 characters > 127; we can use the bit map
for the smaller ones. */

#ifdef SUPPORT_UCP	#ifdef SUPPORT_UCP
continue; /* With next character in the class */	if (utf && (options & PCRE_CASELESS) != 0 &&
#else	(d = UCD_CASESET(c)) != 0)
if ((options & PCRE_CASELESS) == 0 \|\| c > 127) continue;	{
	*code++ = OP_NOTPROP;
	*code++ = PT_CLIST;
	*code++ = d;
	}
	else
	#endif
	/* Char has only one other case, or UCP not available */

/* Adjust upper limit and fall through to set up the map */

d = 127;

#endif /* SUPPORT_UCP */
}
#endif /* SUPPORT_UTF8 */

/* We use the bit map for all cases when not in UTF-8 mode; else
ranges that lie entirely within 0-127 when there is UCP support; else
for partial ranges without UCP support. */

class_charcount += d - c + 1;
class_lastchar = d;

/* We can save a bit of time by skipping this in the pre-compile. */

if (lengthptr == NULL) for (; c <= d; c++)
{
classbits[c/8] \|= (1 << (c&7));
if ((options & PCRE_CASELESS) != 0)
{	{
int uc = cd->fcc[c]; /* flip case */	*code++ = ((options & PCRE_CASELESS) != 0)? OP_NOTI: OP_NOT;
classbits[uc/8] \|= (1 << (uc&7));	#if defined SUPPORT_UTF && !defined COMPILE_PCRE32
	if (utf && c > MAX_VALUE_FOR_SINGLE_CHAR)
	code += PRIV(ord2utf)(c, code);
	else
	#endif
	*code++ = c;
}	}
}

continue; /* Go get the next char in the class */	/* We are finished with this character class */
}

/* Handle a lone single character - we can get here for a normal	goto END_CLASS;
non-escape char, or after \ that introduces a single character or for an	}
apparent range that isn't. */

LONE_SINGLE_CHARACTER:	/* For a single, positive character, get the value into mcbuffer, and
	then we can handle this with the normal one-character code. */

/* Handle a character that cannot go in the bit map */	#if defined SUPPORT_UTF && !defined COMPILE_PCRE32
	if (utf && c > MAX_VALUE_FOR_SINGLE_CHAR)
#ifdef SUPPORT_UTF8	mclength = PRIV(ord2utf)(c, mcbuffer);
if (utf8 && (c > 255 \|\| ((options & PCRE_CASELESS) != 0 && c > 127)))	else
{	#endif
class_utf8 = TRUE;
*class_utf8data++ = XCL_SINGLE;
class_utf8data += _pcre_ord2utf8(c, class_utf8data);

#ifdef SUPPORT_UCP
if ((options & PCRE_CASELESS) != 0)
{	{
unsigned int othercase;	mcbuffer[0] = c;
if ((othercase = UCD_OTHERCASE(c)) != c)	mclength = 1;
{
*class_utf8data++ = XCL_SINGLE;
class_utf8data += _pcre_ord2utf8(othercase, class_utf8data);
}
}	}
#endif /* SUPPORT_UCP */	goto ONE_CHAR;
	} /* End of 1-char optimization */

}	/* There is more than one character in the class, or an XCLASS item
else	has been generated. Add this character to the class. */
#endif /* SUPPORT_UTF8 */

/* Handle a single-byte character */	class_has_8bitchar +=
{	add_to_class(classbits, &class_uchardata, options, cd, c, c);
classbits[c/8] \|= (1 << (c&7));
if ((options & PCRE_CASELESS) != 0)
{
c = cd->fcc[c]; /* flip case */
classbits[c/8] \|= (1 << (c&7));
}
class_charcount++;
class_lastchar = c;
}
}	}

/* Loop until ']' reached. This "while" is the end of the "do" far above.	/* Loop until ']' reached. This "while" is the end of the "do" far above.
If we are at the end of an internal nested string, revert to the outer	If we are at the end of an internal nested string, revert to the outer
string. */	string. */

while (((c = *(++ptr)) != 0 \|\|	while (((c = *(++ptr)) != CHAR_NULL \|\|
(nestptr != NULL &&	(nestptr != NULL &&
(ptr = nestptr, nestptr = NULL, c = *(++ptr)) != 0)) &&	(ptr = nestptr, nestptr = NULL, c = *(++ptr)) != CHAR_NULL)) &&
(c != CHAR_RIGHT_SQUARE_BRACKET \|\| inescq));	(c != CHAR_RIGHT_SQUARE_BRACKET \|\| inescq));

/* Check for missing terminating ']' */	/* Check for missing terminating ']' */

if (c == 0)	if (c == CHAR_NULL)
{	{
*errorcodeptr = ERR6;	*errorcodeptr = ERR6;
goto FAILED;	goto FAILED;
}	}

/* If class_charcount is 1, we saw precisely one character whose value is	/* We will need an XCLASS if data has been placed in class_uchardata. In
less than 256. As long as there were no characters >= 128 and there was no	the second phase this is a sufficient test. However, in the pre-compile
use of \p or \P, in other words, no use of any XCLASS features, we can	phase, class_uchardata gets emptied to prevent workspace overflow, so it
optimize.	only if the very last character in the class needs XCLASS will it contain
	anything at this point. For this reason, xclass gets set TRUE above when
	uchar_classdata is emptied, and that's why this code is the way it is here
	instead of just doing a test on class_uchardata below. */

In UTF-8 mode, we can optimize the negative case only if there were no	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
characters >= 128 because OP_NOT and the related opcodes like OP_NOTSTAR	if (class_uchardata > class_uchardata_base) xclass = TRUE;
operate on single-bytes characters only. This is an historical hangover.
Maybe one day we can tidy these opcodes to handle multi-byte characters.

The optimization throws away the bit map. We turn the item into a
1-character OP_CHAR[I] if it's positive, or OP_NOT[I] if it's negative.
Note that OP_NOT[I] does not support multibyte characters. In the positive
case, it can cause firstbyte to be set. Otherwise, there can be no first
char if this item is first, whatever repeat count may follow. In the case
of reqbyte, save the previous value for reinstating. */

#ifdef SUPPORT_UTF8
if (class_charcount == 1 && !class_utf8 &&
(!utf8 \|\| !negate_class \|\| class_lastchar < 128))
#else
if (class_charcount == 1)
#endif	#endif
{
zeroreqbyte = reqbyte;

/* The OP_NOT[I] opcodes work on one-byte characters only. */	/* If this is the first thing in the branch, there can be no first char
	setting, whatever the repeat count. Any reqchar setting must remain
	unchanged after any kind of repeat. */

if (negate_class)	if (firstcharflags == REQ_UNSET) firstcharflags = REQ_NONE;
{	zerofirstchar = firstchar;
if (firstbyte == REQ_UNSET) firstbyte = REQ_NONE;	zerofirstcharflags = firstcharflags;
zerofirstbyte = firstbyte;	zeroreqchar = reqchar;
*code++ = ((options & PCRE_CASELESS) != 0)? OP_NOTI: OP_NOT;	zeroreqcharflags = reqcharflags;
*code++ = class_lastchar;
break;
}

/* For a single, positive character, get the value into mcbuffer, and
then we can handle this with the normal one-character code. */

#ifdef SUPPORT_UTF8
if (utf8 && class_lastchar > 127)
mclength = _pcre_ord2utf8(class_lastchar, mcbuffer);
else
#endif
{
mcbuffer[0] = class_lastchar;
mclength = 1;
}
goto ONE_CHAR;
} /* End of 1-char optimization */

/* The general case - not the one-char optimization. If this is the first
thing in the branch, there can be no first char setting, whatever the
repeat count. Any reqbyte setting must remain unchanged after any kind of
repeat. */

if (firstbyte == REQ_UNSET) firstbyte = REQ_NONE;
zerofirstbyte = firstbyte;
zeroreqbyte = reqbyte;

/* If there are characters with values > 255, we have to compile an	/* If there are characters with values > 255, we have to compile an
extended class, with its own opcode, unless there was a negated special	extended class, with its own opcode, unless there was a negated special
such as \S in the class, and PCRE_UCP is not set, because in that case all	such as \S in the class, and PCRE_UCP is not set, because in that case all
Line 4360 for (;; ptr++)	Line 5392 for (;; ptr++)
be listed) there are no characters < 256, we can omit the bitmap in the	be listed) there are no characters < 256, we can omit the bitmap in the
actual compiled code. */	actual compiled code. */

#ifdef SUPPORT_UTF8	#ifdef SUPPORT_UTF
if (class_utf8 && (!should_flip_negation \|\| (options & PCRE_UCP) != 0))	if (xclass && (!should_flip_negation \|\| (options & PCRE_UCP) != 0))
	#elif !defined COMPILE_PCRE8
	if (xclass && !should_flip_negation)
	#endif
	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
{	{
class_utf8data++ = XCL_END; / Marks the end of extra data */	class_uchardata++ = XCL_END; / Marks the end of extra data */
*code++ = OP_XCLASS;	*code++ = OP_XCLASS;
code += LINK_SIZE;	code += LINK_SIZE;
*code = negate_class? XCL_NOT : 0;	*code = negate_class? XCL_NOT:0;

/* If the map is required, move up the extra data to make room for it;	/* If the map is required, move up the extra data to make room for it;
otherwise just move the code pointer to the end of the extra data. */	otherwise just move the code pointer to the end of the extra data. */

if (class_charcount > 0)	if (class_has_8bitchar > 0)
{	{
*code++ \|= XCL_MAP;	*code++ \|= XCL_MAP;
memmove(code + 32, code, class_utf8data - code);	memmove(code + (32 / sizeof(pcre_uchar)), code,
	IN_UCHARS(class_uchardata - code));
memcpy(code, classbits, 32);	memcpy(code, classbits, 32);
code = class_utf8data + 32;	code = class_uchardata + (32 / sizeof(pcre_uchar));
}	}
else code = class_utf8data;	else code = class_uchardata;

/* Now fill in the complete length of the item */	/* Now fill in the complete length of the item */

Line 4394 for (;; ptr++)	Line 5431 for (;; ptr++)
negating it if necessary. */	negating it if necessary. */

*code++ = (negate_class == should_flip_negation) ? OP_CLASS : OP_NCLASS;	*code++ = (negate_class == should_flip_negation) ? OP_CLASS : OP_NCLASS;
if (negate_class)	if (lengthptr == NULL) /* Save time in the pre-compile phase */
{	{
if (lengthptr == NULL) /* Save time in the pre-compile phase */	if (negate_class)
for (c = 0; c < 32; c++) code[c] = ~classbits[c];	for (c = 0; c < 32; c++) classbits[c] = ~classbits[c];
}
else
{
memcpy(code, classbits, 32);	memcpy(code, classbits, 32);
}	}
code += 32;	code += 32 / sizeof(pcre_uchar);

	END_CLASS:
break;	break;


Line 4440 for (;; ptr++)	Line 5476 for (;; ptr++)

if (repeat_min == 0)	if (repeat_min == 0)
{	{
firstbyte = zerofirstbyte; /* Adjust for zero repeat */	firstchar = zerofirstchar; /* Adjust for zero repeat */
reqbyte = zeroreqbyte; /* Ditto */	firstcharflags = zerofirstcharflags;
	reqchar = zeroreqchar; /* Ditto */
	reqcharflags = zeroreqcharflags;
}	}

/* Remember whether this is a variable length repeat */	/* Remember whether this is a variable length repeat */
Line 4456 for (;; ptr++)	Line 5494 for (;; ptr++)

tempcode = previous;	tempcode = previous;

	/* Before checking for a possessive quantifier, we must skip over
	whitespace and comments in extended mode because Perl allows white space at
	this point. */

	if ((options & PCRE_EXTENDED) != 0)
	{
	const pcre_uchar *p = ptr + 1;
	for (;;)
	{
	while (MAX_255(p) && (cd->ctypes[p] & ctype_space) != 0) p++;
	if (*p != CHAR_NUMBER_SIGN) break;
	p++;
	while (*p != CHAR_NULL)
	{
	if (IS_NEWLINE(p)) /* For non-fixed-length newline cases, */
	{ /* IS_NEWLINE sets cd->nllen. */
	p += cd->nllen;
	break;
	}
	p++;
	#ifdef SUPPORT_UTF
	if (utf) FORWARDCHAR(p);
	#endif
	} /* Loop for comment characters */
	} /* Loop for multiple comments */
	ptr = p - 1; /* Character before the next significant one. */
	}

/* If the next character is '+', we have a possessive quantifier. This	/* If the next character is '+', we have a possessive quantifier. This
implies greediness, whatever the setting of the PCRE_UNGREEDY option.	implies greediness, whatever the setting of the PCRE_UNGREEDY option.
If the next character is '?' this is a minimizing repeat, by default,	If the next character is '?' this is a minimizing repeat, by default,
Line 4483 for (;; ptr++)	Line 5549 for (;; ptr++)

if (*previous == OP_RECURSE)	if (*previous == OP_RECURSE)
{	{
memmove(previous + 1 + LINK_SIZE, previous, 1 + LINK_SIZE);	memmove(previous + 1 + LINK_SIZE, previous, IN_UCHARS(1 + LINK_SIZE));
*previous = OP_ONCE;	*previous = OP_ONCE;
PUT(previous, 1, 2 + 2*LINK_SIZE);	PUT(previous, 1, 2 + 2*LINK_SIZE);
previous[2 + 2*LINK_SIZE] = OP_KET;	previous[2 + 2*LINK_SIZE] = OP_KET;
Line 4504 for (;; ptr++)	Line 5570 for (;; ptr++)

/* Now handle repetition for the different types of item. */	/* Now handle repetition for the different types of item. */

/* If previous was a character match, abolish the item and generate a	/* If previous was a character or negated character match, abolish the item
repeat item instead. If a char item has a minumum of more than one, ensure	and generate a repeat item instead. If a char item has a minimum of more
that it is set in reqbyte - it might not be if a sequence such as x{3} is	than one, ensure that it is set in reqchar - it might not be if a sequence
the first thing in a branch because the x will have gone into firstbyte	such as x{3} is the first thing in a branch because the x will have gone
instead. */	into firstchar instead. */

if (previous == OP_CHAR \|\| previous == OP_CHARI)	if (previous == OP_CHAR \|\| previous == OP_CHARI
	\|\| previous == OP_NOT \|\| previous == OP_NOTI)
{	{
op_type = (*previous == OP_CHAR)? 0 : OP_STARI - OP_STAR;	switch (*previous)
	{
	default: /* Make compiler happy. */
	case OP_CHAR: op_type = OP_STAR - OP_STAR; break;
	case OP_CHARI: op_type = OP_STARI - OP_STAR; break;
	case OP_NOT: op_type = OP_NOTSTAR - OP_STAR; break;
	case OP_NOTI: op_type = OP_NOTSTARI - OP_STAR; break;
	}

/* Deal with UTF-8 characters that take up more than one byte. It's	/* Deal with UTF characters that take up more than one character. It's
easier to write this out separately than try to macrify it. Use c to	easier to write this out separately than try to macrify it. Use c to
hold the length of the character in bytes, plus 0x80 to flag that it's a	hold the length of the character in bytes, plus UTF_LENGTH to flag that
length rather than a small character. */	it's a length rather than a small character. */

#ifdef SUPPORT_UTF8	#if defined SUPPORT_UTF && !defined COMPILE_PCRE32
if (utf8 && (code[-1] & 0x80) != 0)	if (utf && NOT_FIRSTCHAR(code[-1]))
{	{
uschar *lastchar = code - 1;	pcre_uchar *lastchar = code - 1;
while((*lastchar & 0xc0) == 0x80) lastchar--;	BACKCHAR(lastchar);
c = (int)(code - lastchar); /* Length of UTF-8 character */	c = (int)(code - lastchar); /* Length of UTF-8 character */
memcpy(utf8_char, lastchar, c); /* Save the char */	memcpy(utf_chars, lastchar, IN_UCHARS(c)); /* Save the char */
c \|= 0x80; /* Flag c as a length */	c \|= UTF_LENGTH; /* Flag c as a length */
}	}
else	else
#endif	#endif /* SUPPORT_UTF */

/* Handle the case of a single byte - either with no UTF8 support, or	/* Handle the case of a single charater - either with no UTF support, or
with UTF-8 disabled, or for a UTF-8 character < 128. */	with UTF disabled, or for a single character UTF character. */

{	{
c = code[-1];	c = code[-1];
if (repeat_min > 1) reqbyte = c \| req_caseopt \| cd->req_varyopt;	if (*previous <= OP_CHARI && repeat_min > 1)
	{
	reqchar = c;
	reqcharflags = req_caseopt \| cd->req_varyopt;
	}
}	}

/* If the repetition is unlimited, it pays to see if the next thing on
the line is something that cannot possibly match this character. If so,
automatically possessifying this item gains some performance in the case
where the match fails. */

if (!possessive_quantifier &&
repeat_max < 0 &&
check_auto_possessive(previous, utf8, ptr + 1, options, cd))
{
repeat_type = 0; /* Force greedy */
possessive_quantifier = TRUE;
}

goto OUTPUT_SINGLE_REPEAT; /* Code shared with single character types */	goto OUTPUT_SINGLE_REPEAT; /* Code shared with single character types */
}	}

/* If previous was a single negated character ([^a] or similar), we use
one of the special opcodes, replacing it. The code is shared with single-
character repeats by setting opt_type to add a suitable offset into
repeat_type. We can also test for auto-possessification. OP_NOT and OP_NOTI
are currently used only for single-byte chars. */

else if (previous == OP_NOT \|\| previous == OP_NOTI)
{
op_type = ((*previous == OP_NOT)? OP_NOTSTAR : OP_NOTSTARI) - OP_STAR;
c = previous[1];
if (!possessive_quantifier &&
repeat_max < 0 &&
check_auto_possessive(previous, utf8, ptr + 1, options, cd))
{
repeat_type = 0; /* Force greedy */
possessive_quantifier = TRUE;
}
goto OUTPUT_SINGLE_REPEAT;
}

/* If previous was a character type match (\d or similar), abolish it and	/* If previous was a character type match (\d or similar), abolish it and
create a suitable repeat item. The code is shared with single-character	create a suitable repeat item. The code is shared with single-character
repeats by setting op_type to add a suitable offset into repeat_type. Note	repeats by setting op_type to add a suitable offset into repeat_type. Note
Line 4584 for (;; ptr++)	Line 5628 for (;; ptr++)

else if (*previous < OP_EODN)	else if (*previous < OP_EODN)
{	{
uschar *oldcode;	pcre_uchar *oldcode;
int prop_type, prop_value;	int prop_type, prop_value;
op_type = OP_TYPESTAR - OP_STAR; /* Use type opcodes */	op_type = OP_TYPESTAR - OP_STAR; /* Use type opcodes */
c = *previous;	c = *previous;

if (!possessive_quantifier &&
repeat_max < 0 &&
check_auto_possessive(previous, utf8, ptr + 1, options, cd))
{
repeat_type = 0; /* Force greedy */
possessive_quantifier = TRUE;
}

OUTPUT_SINGLE_REPEAT:	OUTPUT_SINGLE_REPEAT:
if (previous == OP_PROP \|\| previous == OP_NOTPROP)	if (previous == OP_PROP \|\| previous == OP_NOTPROP)
{	{
Line 4613 for (;; ptr++)	Line 5649 for (;; ptr++)

if (repeat_max == 0) goto END_REPEAT;	if (repeat_max == 0) goto END_REPEAT;

/--------------------------------------------------------------------/
/* This code is obsolete from release 8.00; the restriction was finally
removed: */

/* All real repeats make it impossible to handle partial matching (maybe
one day we will be able to remove this restriction). */

/* if (repeat_max != 1) cd->external_flags \|= PCRE_NOPARTIAL; */
/--------------------------------------------------------------------/

/* Combine the op_type with the repeat_type */	/* Combine the op_type with the repeat_type */

repeat_type += op_type;	repeat_type += op_type;
Line 4671 for (;; ptr++)	Line 5697 for (;; ptr++)
we have to insert the character for the previous code. For a repeated	we have to insert the character for the previous code. For a repeated
Unicode property match, there are two extra bytes that define the	Unicode property match, there are two extra bytes that define the
required property. In UTF-8 mode, long characters have their length in	required property. In UTF-8 mode, long characters have their length in
c, with the 0x80 bit as a flag. */	c, with the UTF_LENGTH bit as a flag. */

if (repeat_max < 0)	if (repeat_max < 0)
{	{
#ifdef SUPPORT_UTF8	#if defined SUPPORT_UTF && !defined COMPILE_PCRE32
if (utf8 && c >= 128)	if (utf && (c & UTF_LENGTH) != 0)
{	{
memcpy(code, utf8_char, c & 7);	memcpy(code, utf_chars, IN_UCHARS(c & 7));
code += c & 7;	code += c & 7;
}	}
else	else
Line 4700 for (;; ptr++)	Line 5726 for (;; ptr++)

else if (repeat_max != repeat_min)	else if (repeat_max != repeat_min)
{	{
#ifdef SUPPORT_UTF8	#if defined SUPPORT_UTF && !defined COMPILE_PCRE32
if (utf8 && c >= 128)	if (utf && (c & UTF_LENGTH) != 0)
{	{
memcpy(code, utf8_char, c & 7);	memcpy(code, utf_chars, IN_UCHARS(c & 7));
code += c & 7;	code += c & 7;
}	}
else	else
Line 4730 for (;; ptr++)	Line 5756 for (;; ptr++)

/* The character or character type itself comes last in all cases. */	/* The character or character type itself comes last in all cases. */

#ifdef SUPPORT_UTF8	#if defined SUPPORT_UTF && !defined COMPILE_PCRE32
if (utf8 && c >= 128)	if (utf && (c & UTF_LENGTH) != 0)
{	{
memcpy(code, utf8_char, c & 7);	memcpy(code, utf_chars, IN_UCHARS(c & 7));
code += c & 7;	code += c & 7;
}	}
else	else
Line 4755 for (;; ptr++)	Line 5781 for (;; ptr++)
/* If previous was a character class or a back reference, we put the repeat	/* If previous was a character class or a back reference, we put the repeat
stuff after it, but just skip the item if the repeat was {0,0}. */	stuff after it, but just skip the item if the repeat was {0,0}. */

else if (*previous == OP_CLASS \|\|	else if (previous == OP_CLASS \|\| previous == OP_NCLASS \|\|
*previous == OP_NCLASS \|\|	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
#ifdef SUPPORT_UTF8
*previous == OP_XCLASS \|\|	*previous == OP_XCLASS \|\|
#endif	#endif
*previous == OP_REF \|\|	previous == OP_REF \|\| previous == OP_REFI \|\|
*previous == OP_REFI)	previous == OP_DNREF \|\| previous == OP_DNREFI)
{	{
if (repeat_max == 0)	if (repeat_max == 0)
{	{
Line 4769 for (;; ptr++)	Line 5794 for (;; ptr++)
goto END_REPEAT;	goto END_REPEAT;
}	}

/--------------------------------------------------------------------/
/* This code is obsolete from release 8.00; the restriction was finally
removed: */

/* All real repeats make it impossible to handle partial matching (maybe
one day we will be able to remove this restriction). */

/* if (repeat_max != 1) cd->external_flags \|= PCRE_NOPARTIAL; */
/--------------------------------------------------------------------/

if (repeat_min == 0 && repeat_max == -1)	if (repeat_min == 0 && repeat_max == -1)
*code++ = OP_CRSTAR + repeat_type;	*code++ = OP_CRSTAR + repeat_type;
else if (repeat_min == 1 && repeat_max == -1)	else if (repeat_min == 1 && repeat_max == -1)
Line 4799 for (;; ptr++)	Line 5814 for (;; ptr++)
opcodes such as BRA and CBRA, as this is the place where they get converted	opcodes such as BRA and CBRA, as this is the place where they get converted
into the more special varieties such as BRAPOS and SBRA. A test for >=	into the more special varieties such as BRAPOS and SBRA. A test for >=
OP_ASSERT and <= OP_COND includes ASSERT, ASSERT_NOT, ASSERTBACK,	OP_ASSERT and <= OP_COND includes ASSERT, ASSERT_NOT, ASSERTBACK,
ASSERTBACK_NOT, ONCE, BRA, CBRA, and COND. Originally, PCRE did not allow	ASSERTBACK_NOT, ONCE, ONCE_NC, BRA, BRAPOS, CBRA, CBRAPOS, and COND.
repetition of assertions, but now it does, for Perl compatibility. */	Originally, PCRE did not allow repetition of assertions, but now it does,
	for Perl compatibility. */

else if (previous >= OP_ASSERT && previous <= OP_COND)	else if (previous >= OP_ASSERT && previous <= OP_COND)
{	{
register int i;	register int i;
int len = (int)(code - previous);	int len = (int)(code - previous);
uschar *bralink = NULL;	pcre_uchar *bralink = NULL;
uschar *brazeroptr = NULL;	pcre_uchar *brazeroptr = NULL;

/* Repeating a DEFINE group is pointless, but Perl allows the syntax, so	/* Repeating a DEFINE group is pointless, but Perl allows the syntax, so
we just ignore the repeat. */	we just ignore the repeat. */
Line 4818 for (;; ptr++)	Line 5834 for (;; ptr++)
/* There is no sense in actually repeating assertions. The only potential	/* There is no sense in actually repeating assertions. The only potential
use of repetition is in cases when the assertion is optional. Therefore,	use of repetition is in cases when the assertion is optional. Therefore,
if the minimum is greater than zero, just ignore the repeat. If the	if the minimum is greater than zero, just ignore the repeat. If the
maximum is not not zero or one, set it to 1. */	maximum is not zero or one, set it to 1. */

if (previous < OP_ONCE) / Assertion */	if (previous < OP_ONCE) / Assertion */
{	{
Line 4860 for (;; ptr++)	Line 5876 for (;; ptr++)
if (repeat_max <= 1) /* Covers 0, 1, and unlimited */	if (repeat_max <= 1) /* Covers 0, 1, and unlimited */
{	{
*code = OP_END;	*code = OP_END;
adjust_recurse(previous, 1, utf8, cd, save_hwm);	adjust_recurse(previous, 1, utf, cd, save_hwm);
memmove(previous+1, previous, len);	memmove(previous + 1, previous, IN_UCHARS(len));
code++;	code++;
if (repeat_max == 0)	if (repeat_max == 0)
{	{
Line 4884 for (;; ptr++)	Line 5900 for (;; ptr++)
{	{
int offset;	int offset;
*code = OP_END;	*code = OP_END;
adjust_recurse(previous, 2 + LINK_SIZE, utf8, cd, save_hwm);	adjust_recurse(previous, 2 + LINK_SIZE, utf, cd, save_hwm);
memmove(previous + 2 + LINK_SIZE, previous, len);	memmove(previous + 2 + LINK_SIZE, previous, IN_UCHARS(len));
code += 2 + LINK_SIZE;	code += 2 + LINK_SIZE;
*previous++ = OP_BRAZERO + repeat_type;	*previous++ = OP_BRAZERO + repeat_type;
*previous++ = OP_BRA;	*previous++ = OP_BRA;
Line 4938 for (;; ptr++)	Line 5954 for (;; ptr++)

else	else
{	{
if (groupsetfirstbyte && reqbyte < 0) reqbyte = firstbyte;	if (groupsetfirstchar && reqcharflags < 0)
	{
	reqchar = firstchar;
	reqcharflags = firstcharflags;
	}

for (i = 1; i < repeat_min; i++)	for (i = 1; i < repeat_min; i++)
{	{
uschar *hc;	pcre_uchar *hc;
uschar *this_hwm = cd->hwm;	pcre_uchar *this_hwm = cd->hwm;
memcpy(code, previous, len);	memcpy(code, previous, IN_UCHARS(len));

while (cd->hwm > cd->start_workspace + cd->workspace_size -	while (cd->hwm > cd->start_workspace + cd->workspace_size -
WORK_SIZE_SAFETY_MARGIN - (this_hwm - save_hwm))	WORK_SIZE_SAFETY_MARGIN - (this_hwm - save_hwm))
Line 4953 for (;; ptr++)	Line 5973 for (;; ptr++)
int this_offset = this_hwm - cd->start_workspace;	int this_offset = this_hwm - cd->start_workspace;
*errorcodeptr = expand_workspace(cd);	*errorcodeptr = expand_workspace(cd);
if (*errorcodeptr != 0) goto FAILED;	if (*errorcodeptr != 0) goto FAILED;
save_hwm = (uschar *)cd->start_workspace + save_offset;	save_hwm = (pcre_uchar *)cd->start_workspace + save_offset;
this_hwm = (uschar *)cd->start_workspace + this_offset;	this_hwm = (pcre_uchar *)cd->start_workspace + this_offset;
}	}

for (hc = save_hwm; hc < this_hwm; hc += LINK_SIZE)	for (hc = save_hwm; hc < this_hwm; hc += LINK_SIZE)
Line 5006 for (;; ptr++)	Line 6026 for (;; ptr++)

else for (i = repeat_max - 1; i >= 0; i--)	else for (i = repeat_max - 1; i >= 0; i--)
{	{
uschar *hc;	pcre_uchar *hc;
uschar *this_hwm = cd->hwm;	pcre_uchar *this_hwm = cd->hwm;

*code++ = OP_BRAZERO + repeat_type;	*code++ = OP_BRAZERO + repeat_type;

Line 5023 for (;; ptr++)	Line 6043 for (;; ptr++)
PUTINC(code, 0, offset);	PUTINC(code, 0, offset);
}	}

memcpy(code, previous, len);	memcpy(code, previous, IN_UCHARS(len));

/* Ensure there is enough workspace for forward references before	/* Ensure there is enough workspace for forward references before
copying them. */	copying them. */
Line 5035 for (;; ptr++)	Line 6055 for (;; ptr++)
int this_offset = this_hwm - cd->start_workspace;	int this_offset = this_hwm - cd->start_workspace;
*errorcodeptr = expand_workspace(cd);	*errorcodeptr = expand_workspace(cd);
if (*errorcodeptr != 0) goto FAILED;	if (*errorcodeptr != 0) goto FAILED;
save_hwm = (uschar *)cd->start_workspace + save_offset;	save_hwm = (pcre_uchar *)cd->start_workspace + save_offset;
this_hwm = (uschar *)cd->start_workspace + this_offset;	this_hwm = (pcre_uchar *)cd->start_workspace + this_offset;
}	}

for (hc = save_hwm; hc < this_hwm; hc += LINK_SIZE)	for (hc = save_hwm; hc < this_hwm; hc += LINK_SIZE)
Line 5055 for (;; ptr++)	Line 6075 for (;; ptr++)
{	{
int oldlinkoffset;	int oldlinkoffset;
int offset = (int)(code - bralink + 1);	int offset = (int)(code - bralink + 1);
uschar *bra = code - offset;	pcre_uchar *bra = code - offset;
oldlinkoffset = GET(bra, 1);	oldlinkoffset = GET(bra, 1);
bralink = (oldlinkoffset == 0)? NULL : bralink - oldlinkoffset;	bralink = (oldlinkoffset == 0)? NULL : bralink - oldlinkoffset;
*code++ = OP_KET;	*code++ = OP_KET;
Line 5091 for (;; ptr++)	Line 6111 for (;; ptr++)

else	else
{	{
uschar *ketcode = code - 1 - LINK_SIZE;	pcre_uchar *ketcode = code - 1 - LINK_SIZE;
uschar *bracode = ketcode - GET(ketcode, 1);	pcre_uchar *bracode = ketcode - GET(ketcode, 1);

/* Convert possessive ONCE brackets to non-capturing */	/* Convert possessive ONCE brackets to non-capturing */

Line 5114 for (;; ptr++)	Line 6134 for (;; ptr++)

if (lengthptr == NULL)	if (lengthptr == NULL)
{	{
uschar *scode = bracode;	pcre_uchar *scode = bracode;
do	do
{	{
if (could_be_empty_branch(scode, ketcode, utf8, cd))	if (could_be_empty_branch(scode, ketcode, utf, cd, NULL))
{	{
*bracode += OP_SBRA - OP_BRA;	*bracode += OP_SBRA - OP_BRA;
break;	break;
Line 5140 for (;; ptr++)	Line 6160 for (;; ptr++)
{	{
int nlen = (int)(code - bracode);	int nlen = (int)(code - bracode);
*code = OP_END;	*code = OP_END;
adjust_recurse(bracode, 1 + LINK_SIZE, utf8, cd, save_hwm);	adjust_recurse(bracode, 1 + LINK_SIZE, utf, cd, save_hwm);
memmove(bracode + 1+LINK_SIZE, bracode, nlen);	memmove(bracode + 1 + LINK_SIZE, bracode, IN_UCHARS(nlen));
code += 1 + LINK_SIZE;	code += 1 + LINK_SIZE;
nlen += 1 + LINK_SIZE;	nlen += 1 + LINK_SIZE;
*bracode = OP_BRAPOS;	*bracode = OP_BRAPOS;
Line 5187 for (;; ptr++)	Line 6207 for (;; ptr++)
goto FAILED;	goto FAILED;
}	}

/* If the character following a repeat is '+', or if certain optimization	/* If the character following a repeat is '+', possessive_quantifier is
tests above succeeded, possessive_quantifier is TRUE. For some opcodes,	TRUE. For some opcodes, there are special alternative opcodes for this
there are special alternative opcodes for this case. For anything else, we	case. For anything else, we wrap the entire repeated item inside OP_ONCE
wrap the entire repeated item inside OP_ONCE brackets. Logically, the '+'	brackets. Logically, the '+' notation is just syntactic sugar, taken from
notation is just syntactic sugar, taken from Sun's Java package, but the	Sun's Java package, but the special opcodes can optimize it.
special opcodes can optimize it.

Some (but not all) possessively repeated subpatterns have already been	Some (but not all) possessively repeated subpatterns have already been
completely handled in the code just above. For them, possessive_quantifier	completely handled in the code just above. For them, possessive_quantifier
is always FALSE at this stage.	is always FALSE at this stage. Note that the repeated item starts at
	tempcode, not at previous, which might be the first part of a string whose
	(former) last char we repeated. */

Note that the repeated item starts at tempcode, not at previous, which
might be the first part of a string whose (former) last char we repeated.

Possessifying an 'exact' quantifier has no effect, so we can ignore it. But
an 'upto' may follow. We skip over an 'exact' item, and then test the
length of what remains before proceeding. */

if (possessive_quantifier)	if (possessive_quantifier)
{	{
int len;	int len;

if (*tempcode == OP_TYPEEXACT)	/* Possessifying an EXACT quantifier has no effect, so we can ignore it.
tempcode += _pcre_OP_lengths[*tempcode] +	However, QUERY, STAR, or UPTO may follow (for quantifiers such as {5,6},
((tempcode[3] == OP_PROP \|\| tempcode[3] == OP_NOTPROP)? 2 : 0);	{5,}, or {5,10}). We skip over an EXACT item; if the length of what
	remains is greater than zero, there's a further opcode that can be
	handled. If not, do nothing, leaving the EXACT alone. */

else if (tempcode == OP_EXACT \|\| tempcode == OP_NOTEXACT)	switch(*tempcode)
{	{
tempcode += _pcre_OP_lengths[*tempcode];	case OP_TYPEEXACT:
#ifdef SUPPORT_UTF8	tempcode += PRIV(OP_lengths)[*tempcode] +
if (utf8 && tempcode[-1] >= 0xc0)	((tempcode[1 + IMM2_SIZE] == OP_PROP
tempcode += _pcre_utf8_table4[tempcode[-1] & 0x3f];	\|\| tempcode[1 + IMM2_SIZE] == OP_NOTPROP)? 2 : 0);
	break;

	/* CHAR opcodes are used for exacts whose count is 1. */

	case OP_CHAR:
	case OP_CHARI:
	case OP_NOT:
	case OP_NOTI:
	case OP_EXACT:
	case OP_EXACTI:
	case OP_NOTEXACT:
	case OP_NOTEXACTI:
	tempcode += PRIV(OP_lengths)[*tempcode];
	#ifdef SUPPORT_UTF
	if (utf && HAS_EXTRALEN(tempcode[-1]))
	tempcode += GET_EXTRALEN(tempcode[-1]);
#endif	#endif
	break;

	/* For the class opcodes, the repeat operator appears at the end;
	adjust tempcode to point to it. */

	case OP_CLASS:
	case OP_NCLASS:
	tempcode += 1 + 32/sizeof(pcre_uchar);
	break;

	#if defined SUPPORT_UTF \|\| !defined COMPILE_PCRE8
	case OP_XCLASS:
	tempcode += GET(tempcode, 1);
	break;
	#endif
}	}

	/* If tempcode is equal to code (which points to the end of the repeated
	item), it means we have skipped an EXACT item but there is no following
	QUERY, STAR, or UPTO; the value of len will be 0, and we do nothing. In
	all other cases, tempcode will be pointing to the repeat opcode, and will
	be less than code, so the value of len will be greater than 0. */

len = (int)(code - tempcode);	len = (int)(code - tempcode);
	if (len > 0)
	{
	unsigned int repcode = *tempcode;

	/* There is a table for possessifying opcodes, all of which are less
	than OP_CALLOUT. A zero entry means there is no possessified version.
	*/

	if (repcode < OP_CALLOUT && opcode_possessify[repcode] > 0)
	*tempcode = opcode_possessify[repcode];

	/* For opcode without a special possessified version, wrap the item in
	ONCE brackets. Because we are moving code along, we must ensure that any
	pending recursive references are updated. */

	else
	{
	*code = OP_END;
	adjust_recurse(tempcode, 1 + LINK_SIZE, utf, cd, save_hwm);
	memmove(tempcode + 1 + LINK_SIZE, tempcode, IN_UCHARS(len));
	code += 1 + LINK_SIZE;
	len += 1 + LINK_SIZE;
	tempcode[0] = OP_ONCE;
	*code++ = OP_KET;
	PUTINC(code, 0, len);
	PUT(tempcode, 1, len);
	}
	}

	#ifdef NEVER
if (len > 0) switch (*tempcode)	if (len > 0) switch (*tempcode)
{	{
case OP_STAR: *tempcode = OP_POSSTAR; break;	case OP_STAR: *tempcode = OP_POSSTAR; break;
Line 5250 for (;; ptr++)	Line 6333 for (;; ptr++)
case OP_TYPEQUERY: *tempcode = OP_TYPEPOSQUERY; break;	case OP_TYPEQUERY: *tempcode = OP_TYPEPOSQUERY; break;
case OP_TYPEUPTO: *tempcode = OP_TYPEPOSUPTO; break;	case OP_TYPEUPTO: *tempcode = OP_TYPEPOSUPTO; break;

	case OP_CRSTAR: *tempcode = OP_CRPOSSTAR; break;
	case OP_CRPLUS: *tempcode = OP_CRPOSPLUS; break;
	case OP_CRQUERY: *tempcode = OP_CRPOSQUERY; break;
	case OP_CRRANGE: *tempcode = OP_CRPOSRANGE; break;

/* Because we are moving code along, we must ensure that any	/* Because we are moving code along, we must ensure that any
pending recursive references are updated. */	pending recursive references are updated. */

default:	default:
*code = OP_END;	*code = OP_END;
adjust_recurse(tempcode, 1 + LINK_SIZE, utf8, cd, save_hwm);	adjust_recurse(tempcode, 1 + LINK_SIZE, utf, cd, save_hwm);
memmove(tempcode + 1+LINK_SIZE, tempcode, len);	memmove(tempcode + 1 + LINK_SIZE, tempcode, IN_UCHARS(len));
code += 1 + LINK_SIZE;	code += 1 + LINK_SIZE;
len += 1 + LINK_SIZE;	len += 1 + LINK_SIZE;
tempcode[0] = OP_ONCE;	tempcode[0] = OP_ONCE;
Line 5265 for (;; ptr++)	Line 6353 for (;; ptr++)
PUT(tempcode, 1, len);	PUT(tempcode, 1, len);
break;	break;
}	}
	#endif
}	}

/* In all case we no longer have a previous item. We also set the	/* In all case we no longer have a previous item. We also set the
"follows varying string" flag for subsequently encountered reqbytes if	"follows varying string" flag for subsequently encountered reqchars if
it isn't already set and we have just passed a varying length item. */	it isn't already set and we have just passed a varying length item. */

END_REPEAT:	END_REPEAT:
Line 5291 for (;; ptr++)	Line 6380 for (;; ptr++)

/* First deal with various "verbs" that can be introduced by ''. /	/* First deal with various "verbs" that can be introduced by ''. /

if (*(++ptr) == CHAR_ASTERISK &&	ptr++;
((cd->ctypes[ptr[1]] & ctype_letter) != 0 \|\| ptr[1] == ':'))	if (ptr[0] == CHAR_ASTERISK && (ptr[1] == ':'
	\|\| (MAX_255(ptr[1]) && ((cd->ctypes[ptr[1]] & ctype_letter) != 0))))
{	{
int i, namelen;	int i, namelen;
int arglen = 0;	int arglen = 0;
const char *vn = verbnames;	const char *vn = verbnames;
const uschar *name = ptr + 1;	const pcre_uchar *name = ptr + 1;
const uschar *arg = NULL;	const pcre_uchar *arg = NULL;
previous = NULL;	previous = NULL;
while ((cd->ctypes[*++ptr] & ctype_letter) != 0) {};	ptr++;
	while (MAX_255(ptr) && (cd->ctypes[ptr] & ctype_letter) != 0) ptr++;
namelen = (int)(ptr - name);	namelen = (int)(ptr - name);

/* It appears that Perl allows any characters whatsoever, other than	/* It appears that Perl allows any characters whatsoever, other than
Line 5310 for (;; ptr++)	Line 6401 for (;; ptr++)
if (*ptr == CHAR_COLON)	if (*ptr == CHAR_COLON)
{	{
arg = ++ptr;	arg = ++ptr;
while (ptr != 0 && ptr != CHAR_RIGHT_PARENTHESIS) ptr++;	while (ptr != CHAR_NULL && ptr != CHAR_RIGHT_PARENTHESIS) ptr++;
arglen = (int)(ptr - arg);	arglen = (int)(ptr - arg);
	if ((unsigned int)arglen > MAX_MARK)
	{
	*errorcodeptr = ERR75;
	goto FAILED;
	}
}	}

if (*ptr != CHAR_RIGHT_PARENTHESIS)	if (*ptr != CHAR_RIGHT_PARENTHESIS)
Line 5325 for (;; ptr++)	Line 6421 for (;; ptr++)
for (i = 0; i < verbcount; i++)	for (i = 0; i < verbcount; i++)
{	{
if (namelen == verbs[i].len &&	if (namelen == verbs[i].len &&
strncmp((char *)name, vn, namelen) == 0)	STRNCMP_UC_C8(name, vn, namelen) == 0)
{	{
	int setverb;

/* Check for open captures before ACCEPT and convert it to	/* Check for open captures before ACCEPT and convert it to
ASSERT_ACCEPT if in an assertion. */	ASSERT_ACCEPT if in an assertion. */

Line 5344 for (;; ptr++)	Line 6442 for (;; ptr++)
*code++ = OP_CLOSE;	*code++ = OP_CLOSE;
PUT2INC(code, 0, oc->number);	PUT2INC(code, 0, oc->number);
}	}
*code++ = (cd->assert_depth > 0)? OP_ASSERT_ACCEPT : OP_ACCEPT;	setverb = *code++ =
	(cd->assert_depth > 0)? OP_ASSERT_ACCEPT : OP_ACCEPT;

/* Do not set firstbyte after ACCEPT /	/* Do not set firstchar after ACCEPT /
if (firstbyte == REQ_UNSET) firstbyte = REQ_NONE;	if (firstcharflags == REQ_UNSET) firstcharflags = REQ_NONE;
}	}

/* Handle other cases with/without an argument */	/* Handle other cases with/without an argument */
Line 5359 for (;; ptr++)	Line 6458 for (;; ptr++)
*errorcodeptr = ERR66;	*errorcodeptr = ERR66;
goto FAILED;	goto FAILED;
}	}
*code = verbs[i].op;	setverb = *code++ = verbs[i].op;
if (*code++ == OP_THEN) cd->external_flags \|= PCRE_HASTHEN;
}	}

else	else
Line 5370 for (;; ptr++)	Line 6468 for (;; ptr++)
*errorcodeptr = ERR59;	*errorcodeptr = ERR59;
goto FAILED;	goto FAILED;
}	}
*code = verbs[i].op_arg;	setverb = *code++ = verbs[i].op_arg;
if (*code++ == OP_THEN_ARG) cd->external_flags \|= PCRE_HASTHEN;
*code++ = arglen;	*code++ = arglen;
memcpy(code, arg, arglen);	memcpy(code, arg, IN_UCHARS(arglen));
code += arglen;	code += arglen;
*code++ = 0;	*code++ = 0;
}	}

	switch (setverb)
	{
	case OP_THEN:
	case OP_THEN_ARG:
	cd->external_flags \|= PCRE_HASTHEN;
	break;

	case OP_PRUNE:
	case OP_PRUNE_ARG:
	case OP_SKIP:
	case OP_SKIP_ARG:
	cd->had_pruneorskip = TRUE;
	break;
	}

break; /* Found verb, exit loop */	break; /* Found verb, exit loop */
}	}

Line 5396 for (;; ptr++)	Line 6508 for (;; ptr++)
{	{
int i, set, unset, namelen;	int i, set, unset, namelen;
int *optset;	int *optset;
const uschar *name;	const pcre_uchar *name;
uschar *slot;	pcre_uchar *slot;

switch (*(++ptr))	switch (*(++ptr))
{	{
case CHAR_NUMBER_SIGN: /* Comment; skip to ket */	case CHAR_NUMBER_SIGN: /* Comment; skip to ket */
ptr++;	ptr++;
while (ptr != 0 && ptr != CHAR_RIGHT_PARENTHESIS) ptr++;	while (ptr != CHAR_NULL && ptr != CHAR_RIGHT_PARENTHESIS) ptr++;
if (*ptr == 0)	if (*ptr == CHAR_NULL)
{	{
*errorcodeptr = ERR18;	*errorcodeptr = ERR18;
goto FAILED;	goto FAILED;
Line 5427 for (;; ptr++)	Line 6539 for (;; ptr++)
/* ------------------------------------------------------------ */	/* ------------------------------------------------------------ */
case CHAR_LEFT_PARENTHESIS:	case CHAR_LEFT_PARENTHESIS:
bravalue = OP_COND; /* Conditional group */	bravalue = OP_COND; /* Conditional group */
	tempptr = ptr;

/* A condition can be an assertion, a number (referring to a numbered	/* A condition can be an assertion, a number (referring to a numbered
group), a name (referring to a named group), or 'R', referring to	group's having been set), a name (referring to a named group), or 'R',
recursion. R<digits> and R&name are also permitted for recursion tests.	referring to recursion. R<digits> and R&name are also permitted for
	recursion tests.

There are several syntaxes for testing a named group: (?(name)) is used	There are ways of testing a named group: (?(name)) is used by Python;
by Python; Perl 5.10 onwards uses (?(<name>) or (?('name')).	Perl 5.10 onwards uses (?(<name>) or (?('name')).

There are two unfortunate ambiguities, caused by history. (a) 'R' can	There is one unfortunate ambiguity, caused by history. 'R' can be the
be the recursive thing or the name 'R' (and similarly for 'R' followed	recursive thing or the name 'R' (and similarly for 'R' followed by
by digits), and (b) a number could be a name that consists of digits.	digits). We look for a name first; if not found, we try the other case.
In both cases, we look for a name first; if not found, we try the other
cases. */

	For compatibility with auto-callouts, we allow a callout to be
	specified before a condition that is an assertion. First, check for the
	syntax of a callout; if found, adjust the temporary pointer that is
	used to check for an assertion condition. That's all that is needed! */

	if (ptr[1] == CHAR_QUESTION_MARK && ptr[2] == CHAR_C)
	{
	for (i = 3;; i++) if (!IS_DIGIT(ptr[i])) break;
	if (ptr[i] == CHAR_RIGHT_PARENTHESIS)
	tempptr += i + 1;
	}

/* For conditions that are assertions, check the syntax, and then exit	/* For conditions that are assertions, check the syntax, and then exit
the switch. This will take control down to where bracketed groups,	the switch. This will take control down to where bracketed groups,
including assertions, are processed. */	including assertions, are processed. */

if (ptr[1] == CHAR_QUESTION_MARK && (ptr[2] == CHAR_EQUALS_SIGN \|\|	if (tempptr[1] == CHAR_QUESTION_MARK &&
ptr[2] == CHAR_EXCLAMATION_MARK \|\| ptr[2] == CHAR_LESS_THAN_SIGN))	(tempptr[2] == CHAR_EQUALS_SIGN \|\|
	tempptr[2] == CHAR_EXCLAMATION_MARK \|\|
	tempptr[2] == CHAR_LESS_THAN_SIGN))
break;	break;

/* Most other conditions use OP_CREF (a couple change to OP_RREF	/* Other conditions use OP_CREF/OP_DNCREF/OP_RREF/OP_DNRREF, and all
below), and all need to skip 3 bytes at the start of the group. */	need to skip at least 1+IMM2_SIZE bytes at the start of the group. */

code[1+LINK_SIZE] = OP_CREF;	code[1+LINK_SIZE] = OP_CREF;
skipbytes = 3;	skipbytes = 1+IMM2_SIZE;
refsign = -1;	refsign = -1;

/* Check for a test for recursion in a named group. */	/* Check for a test for recursion in a named group. */

if (ptr[1] == CHAR_R && ptr[2] == CHAR_AMPERSAND)	ptr++;
	if (*ptr == CHAR_R && ptr[1] == CHAR_AMPERSAND)
{	{
terminator = -1;	terminator = -1;
ptr += 2;	ptr += 2;
Line 5466 for (;; ptr++)	Line 6593 for (;; ptr++)
}	}

/* Check for a test for a named group's having been set, using the Perl	/* Check for a test for a named group's having been set, using the Perl
syntax (?(<name>) or (?('name') */	syntax (?(<name>) or (?('name'), and also allow for the original PCRE
	syntax of (?(name) or for (?(+n), (?(-n), and just (?(n). */

else if (ptr[1] == CHAR_LESS_THAN_SIGN)	else if (*ptr == CHAR_LESS_THAN_SIGN)
{	{
terminator = CHAR_GREATER_THAN_SIGN;	terminator = CHAR_GREATER_THAN_SIGN;
ptr++;	ptr++;
}	}
else if (ptr[1] == CHAR_APOSTROPHE)	else if (*ptr == CHAR_APOSTROPHE)
{	{
terminator = CHAR_APOSTROPHE;	terminator = CHAR_APOSTROPHE;
ptr++;	ptr++;
}	}
else	else
{	{
terminator = 0;	terminator = CHAR_NULL;
if (ptr[1] == CHAR_MINUS \|\| ptr[1] == CHAR_PLUS) refsign = *(++ptr);	if (ptr == CHAR_MINUS \|\| ptr == CHAR_PLUS) refsign = *ptr++;
	else if (IS_DIGIT(*ptr)) refsign = 0;
}	}

/* We now expect to read a name; any thing else is an error */	/* Handle a number */

if ((cd->ctypes[ptr[1]] & ctype_word) == 0)	if (refsign >= 0)
{	{
ptr += 1; /* To get the right offset */	recno = 0;
*errorcodeptr = ERR28;	while (IS_DIGIT(*ptr))
goto FAILED;	{
	recno = recno * 10 + (int)(*ptr - CHAR_0);
	ptr++;
	}
}	}

/* Read the name, but also get it as a number if it's all digits */	/* Otherwise we expect to read a name; anything else is an error. When
	a name is one of a number of duplicates, a different opcode is used and
	it needs more memory. Unfortunately we cannot tell whether a name is a
	duplicate in the first pass, so we have to allow for more memory. */

recno = 0;	else
name = ++ptr;
while ((cd->ctypes[*ptr] & ctype_word) != 0)
{	{
if (recno >= 0)	if (IS_DIGIT(*ptr))
recno = ((digitab[*ptr] & ctype_digit) != 0)?	{
recno * 10 + *ptr - CHAR_0 : -1;	*errorcodeptr = ERR84;
ptr++;	goto FAILED;
	}
	if (!MAX_255(ptr) \|\| (cd->ctypes[ptr] & ctype_word) == 0)
	{
	errorcodeptr = ERR28; / Assertion expected */
	goto FAILED;
	}
	name = ptr++;
	while (MAX_255(ptr) && (cd->ctypes[ptr] & ctype_word) != 0)
	{
	ptr++;
	}
	namelen = (int)(ptr - name);
	if (lengthptr != NULL) *lengthptr += IMM2_SIZE;
}	}
namelen = (int)(ptr - name);

if ((terminator > 0 && *ptr++ != terminator) \|\|	/* Check the terminator */

	if ((terminator > 0 && *ptr++ != (pcre_uchar)terminator) \|\|
*ptr++ != CHAR_RIGHT_PARENTHESIS)	*ptr++ != CHAR_RIGHT_PARENTHESIS)
{	{
ptr--; /* Error offset */	ptr--; /* Error offset */
*errorcodeptr = ERR26;	errorcodeptr = ERR26; / Malformed number or name */
goto FAILED;	goto FAILED;
}	}

Line 5519 for (;; ptr++)	Line 6666 for (;; ptr++)
if (lengthptr != NULL) break;	if (lengthptr != NULL) break;

/* In the real compile we do the work of looking for the actual	/* In the real compile we do the work of looking for the actual
reference. If the string started with "+" or "-" we require the rest to	reference. If refsign is not negative, it means we have a number in
be digits, in which case recno will be set. */	recno. */

if (refsign > 0)	if (refsign >= 0)
{	{
if (recno <= 0)	if (recno <= 0)
{	{
*errorcodeptr = ERR58;	*errorcodeptr = ERR35;
goto FAILED;	goto FAILED;
}	}
recno = (refsign == CHAR_MINUS)?	if (refsign != 0) recno = (refsign == CHAR_MINUS)?
cd->bracount - recno + 1 : recno +cd->bracount;	cd->bracount - recno + 1 : recno + cd->bracount;
if (recno <= 0 \|\| recno > cd->final_bracount)	if (recno <= 0 \|\| recno > cd->final_bracount)
{	{
*errorcodeptr = ERR15;	*errorcodeptr = ERR15;
Line 5540 for (;; ptr++)	Line 6687 for (;; ptr++)
break;	break;
}	}

/* Otherwise (did not start with "+" or "-"), start by looking for the	/* Otherwise look for the name. */
name. If we find a name, add one to the opcode to change OP_CREF or
OP_RREF into OP_NCREF or OP_NRREF. These behave exactly the same,
except they record that the reference was originally to a name. The
information is used to check duplicate names. */

slot = cd->name_table;	slot = cd->name_table;
for (i = 0; i < cd->names_found; i++)	for (i = 0; i < cd->names_found; i++)
{	{
if (strncmp((char )name, (char )slot+2, namelen) == 0) break;	if (STRNCMP_UC_UC(name, slot+IMM2_SIZE, namelen) == 0) break;
slot += cd->name_entry_size;	slot += cd->name_entry_size;
}	}

/* Found a previous named subpattern */	/* Found the named subpattern. If the name is duplicated, add one to
	the opcode to change CREF/RREF into DNCREF/DNRREF and insert
	appropriate data values. Otherwise, just insert the unique subpattern
	number. */

if (i < cd->names_found)	if (i < cd->names_found)
{	{
recno = GET2(slot, 0);	int offset = i++;
PUT2(code, 2+LINK_SIZE, recno);	int count = 1;
code[1+LINK_SIZE]++;	recno = GET2(slot, 0); /* Number from first found */
	for (; i < cd->names_found; i++)
	{
	slot += cd->name_entry_size;
	if (STRNCMP_UC_UC(name, slot+IMM2_SIZE, namelen) != 0) break;
	count++;
	}
	if (count > 1)
	{
	PUT2(code, 2+LINK_SIZE, offset);
	PUT2(code, 2+LINK_SIZE+IMM2_SIZE, count);
	skipbytes += IMM2_SIZE;
	code[1+LINK_SIZE]++;
	}
	else /* Not a duplicated name */
	{
	PUT2(code, 2+LINK_SIZE, recno);
	}
}	}

/* Search the pattern for a forward reference */	/* If terminator == CHAR_NULL it means that the name followed directly
	after the opening parenthesis [e.g. (?(abc)...] and in this case there
	are some further alternatives to try. For the cases where terminator !=
	CHAR_NULL [things like (?(<name>... or (?('name')... or (?(R&name)... ]
	we have now checked all the possibilities, so give an error. */

else if ((i = find_parens(cd, name, namelen,	else if (terminator != CHAR_NULL)
(options & PCRE_EXTENDED) != 0, utf8)) > 0)
{	{
PUT2(code, 2+LINK_SIZE, i);
code[1+LINK_SIZE]++;
}

/* If terminator == 0 it means that the name followed directly after
the opening parenthesis [e.g. (?(abc)...] and in this case there are
some further alternatives to try. For the cases where terminator != 0
[things like (?(<name>... or (?('name')... or (?(R&name)... ] we have
now checked all the possibilities, so give an error. */

else if (terminator != 0)
{
*errorcodeptr = ERR15;	*errorcodeptr = ERR15;
goto FAILED;	goto FAILED;
}	}
Line 5591 for (;; ptr++)	Line 6745 for (;; ptr++)
recno = 0;	recno = 0;
for (i = 1; i < namelen; i++)	for (i = 1; i < namelen; i++)
{	{
if ((digitab[name[i]] & ctype_digit) == 0)	if (!IS_DIGIT(name[i]))
{	{
*errorcodeptr = ERR15;	*errorcodeptr = ERR15;
goto FAILED;	goto FAILED;
Line 5606 for (;; ptr++)	Line 6760 for (;; ptr++)
/* Similarly, check for the (?(DEFINE) "condition", which is always	/* Similarly, check for the (?(DEFINE) "condition", which is always
false. */	false. */

else if (namelen == 6 && strncmp((char *)name, STRING_DEFINE, 6) == 0)	else if (namelen == 6 && STRNCMP_UC_C8(name, STRING_DEFINE, 6) == 0)
{	{
code[1+LINK_SIZE] = OP_DEF;	code[1+LINK_SIZE] = OP_DEF;
skipbytes = 1;	skipbytes = 1;
}	}

/* Check for the "name" actually being a subpattern number. We are	/* Reference to an unidentified subpattern. */
in the second pass here, so final_bracount is set. */

else if (recno > 0 && recno <= cd->final_bracount)
{
PUT2(code, 2+LINK_SIZE, recno);
}

/* Either an unidentified subpattern, or a reference to (?(0) */

else	else
{	{
*errorcodeptr = (recno == 0)? ERR35: ERR15;	*errorcodeptr = ERR15;
goto FAILED;	goto FAILED;
}	}
break;	break;
Line 5637 for (;; ptr++)	Line 6783 for (;; ptr++)
ptr++;	ptr++;
break;	break;

	/* Optimize (?!) to (*FAIL) unless it is quantified - which is a weird
	thing to do, but Perl allows all assertions to be quantified, and when
	they contain capturing parentheses there may be a potential use for
	this feature. Not that that applies to a quantified (?!) but we allow
	it for uniformity. */

/* ------------------------------------------------------------ */	/* ------------------------------------------------------------ */
case CHAR_EXCLAMATION_MARK: /* Negative lookahead */	case CHAR_EXCLAMATION_MARK: /* Negative lookahead */
ptr++;	ptr++;
if (ptr == CHAR_RIGHT_PARENTHESIS) / Optimize (?!) */	if (*ptr == CHAR_RIGHT_PARENTHESIS && ptr[1] != CHAR_ASTERISK &&
	ptr[1] != CHAR_PLUS && ptr[1] != CHAR_QUESTION_MARK &&
	(ptr[1] != CHAR_LEFT_CURLY_BRACKET \|\| !is_counted_repeat(ptr+2)))
{	{
*code++ = OP_FAIL;	*code++ = OP_FAIL;
previous = NULL;	previous = NULL;
Line 5669 for (;; ptr++)	Line 6822 for (;; ptr++)
break;	break;

default: /* Could be name define, else bad */	default: /* Could be name define, else bad */
if ((cd->ctypes[ptr[1]] & ctype_word) != 0) goto DEFINE_NAME;	if (MAX_255(ptr[1]) && (cd->ctypes[ptr[1]] & ctype_word) != 0)
	goto DEFINE_NAME;
ptr++; /* Correct offset for error */	ptr++; /* Correct offset for error */
*errorcodeptr = ERR24;	*errorcodeptr = ERR24;
goto FAILED;	goto FAILED;
Line 5691 for (;; ptr++)	Line 6845 for (;; ptr++)
*code++ = OP_CALLOUT;	*code++ = OP_CALLOUT;
{	{
int n = 0;	int n = 0;
while ((digitab[*(++ptr)] & ctype_digit) != 0)	ptr++;
n = n * 10 + *ptr - CHAR_0;	while(IS_DIGIT(*ptr))
	n = n * 10 + *ptr++ - CHAR_0;
if (*ptr != CHAR_RIGHT_PARENTHESIS)	if (*ptr != CHAR_RIGHT_PARENTHESIS)
{	{
*errorcodeptr = ERR39;	*errorcodeptr = ERR39;
Line 5732 for (;; ptr++)	Line 6887 for (;; ptr++)
/* ------------------------------------------------------------ */	/* ------------------------------------------------------------ */
DEFINE_NAME: /* Come here from (?< handling */	DEFINE_NAME: /* Come here from (?< handling */
case CHAR_APOSTROPHE:	case CHAR_APOSTROPHE:
	terminator = (*ptr == CHAR_LESS_THAN_SIGN)?
	CHAR_GREATER_THAN_SIGN : CHAR_APOSTROPHE;
	name = ++ptr;
	if (IS_DIGIT(*ptr))
{	{
terminator = (*ptr == CHAR_LESS_THAN_SIGN)?	errorcodeptr = ERR84; / Group name must start with non-digit */
CHAR_GREATER_THAN_SIGN : CHAR_APOSTROPHE;	goto FAILED;
name = ++ptr;	}
	while (MAX_255(ptr) && (cd->ctypes[ptr] & ctype_word) != 0) ptr++;
	namelen = (int)(ptr - name);

while ((cd->ctypes[*ptr] & ctype_word) != 0) ptr++;	/* In the pre-compile phase, do a syntax check, remember the longest
namelen = (int)(ptr - name);	name, and then remember the group in a vector, expanding it if
	necessary. Duplicates for the same number are skipped; other duplicates
	are checked for validity. In the actual compile, there is nothing to
	do. */

/* In the pre-compile phase, just do a syntax check. */	if (lengthptr != NULL)
	{
	named_group *ng;
	pcre_uint32 number = cd->bracount + 1;

if (lengthptr != NULL)	if (*ptr != (pcre_uchar)terminator)
{	{
if (*ptr != terminator)	*errorcodeptr = ERR42;
	goto FAILED;
	}

	if (cd->names_found >= MAX_NAME_COUNT)
	{
	*errorcodeptr = ERR49;
	goto FAILED;
	}

	if (namelen + IMM2_SIZE + 1 > cd->name_entry_size)
	{
	cd->name_entry_size = namelen + IMM2_SIZE + 1;
	if (namelen > MAX_NAME_SIZE)
{	{
*errorcodeptr = ERR42;	*errorcodeptr = ERR48;
goto FAILED;	goto FAILED;
}	}
if (cd->names_found >= MAX_NAME_COUNT)	}

	/* Scan the list to check for duplicates. For duplicate names, if the
	number is the same, break the loop, which causes the name to be
	discarded; otherwise, if DUPNAMES is not set, give an error.
	If it is set, allow the name with a different number, but continue
	scanning in case this is a duplicate with the same number. For
	non-duplicate names, give an error if the number is duplicated. */

	ng = cd->named_groups;
	for (i = 0; i < cd->names_found; i++, ng++)
	{
	if (namelen == ng->length &&
	STRNCMP_UC_UC(name, ng->name, namelen) == 0)
{	{
*errorcodeptr = ERR49;	if (ng->number == number) break;
goto FAILED;	if ((options & PCRE_DUPNAMES) == 0)
}
if (namelen + 3 > cd->name_entry_size)
{
cd->name_entry_size = namelen + 3;
if (namelen > MAX_NAME_SIZE)
{	{
*errorcodeptr = ERR48;	*errorcodeptr = ERR43;
goto FAILED;	goto FAILED;
}	}
	cd->dupnames = TRUE; /* Duplicate names exist */
}	}
	else if (ng->number == number)
	{
	*errorcodeptr = ERR65;
	goto FAILED;
	}
}	}

/* In the real compile, create the entry in the table, maintaining	if (i >= cd->names_found) /* Not a duplicate with same number */
alphabetical order. Duplicate names for different numbers are
permitted only if PCRE_DUPNAMES is set. Duplicate names for the same
number are always OK. (An existing number can be re-used if (?\|
appears in the pattern.) In either event, a duplicate name results in
a duplicate entry in the table, even if the number is the same. This
is because the number of names, and hence the table size, is computed
in the pre-compile, and it affects various numbers and pointers which
would all have to be modified, and the compiled code moved down, if
duplicates with the same number were omitted from the table. This
doesn't seem worth the hassle. However, different names for the
same number are not permitted. */

else
{	{
BOOL dupname = FALSE;	/* Increase the list size if necessary */
slot = cd->name_table;

for (i = 0; i < cd->names_found; i++)	if (cd->names_found >= cd->named_group_list_size)
{	{
int crc = memcmp(name, slot+2, namelen);	int newsize = cd->named_group_list_size * 2;
if (crc == 0)	named_group *newspace = (PUBL(malloc))
{	(newsize * sizeof(named_group));
if (slot[2+namelen] == 0)
{
if (GET2(slot, 0) != cd->bracount + 1 &&
(options & PCRE_DUPNAMES) == 0)
{
*errorcodeptr = ERR43;
goto FAILED;
}
else dupname = TRUE;
}
else crc = -1; /* Current name is a substring */
}

/* Make space in the table and break the loop for an earlier	if (newspace == NULL)
name. For a duplicate or later name, carry on. We do this for
duplicates so that in the simple case (when ?(\| is not used) they
are in order of their numbers. */

if (crc < 0)
{	{
memmove(slot + cd->name_entry_size, slot,	*errorcodeptr = ERR21;
(cd->names_found - i) * cd->name_entry_size);	goto FAILED;
break;
}	}

/* Continue the loop for a later or duplicate name */	memcpy(newspace, cd->named_groups,
	cd->named_group_list_size * sizeof(named_group));
slot += cd->name_entry_size;	if (cd->named_group_list_size > NAMED_GROUP_LIST_SIZE)
	(PUBL(free))((void *)cd->named_groups);
	cd->named_groups = newspace;
	cd->named_group_list_size = newsize;
}	}

/* For non-duplicate names, check for a duplicate number before	cd->named_groups[cd->names_found].name = name;
adding the new name. */	cd->named_groups[cd->names_found].length = namelen;
	cd->named_groups[cd->names_found].number = number;
if (!dupname)	cd->names_found++;
{
uschar *cslot = cd->name_table;
for (i = 0; i < cd->names_found; i++)
{
if (cslot != slot)
{
if (GET2(cslot, 0) == cd->bracount + 1)
{
*errorcodeptr = ERR65;
goto FAILED;
}
}
else i--;
cslot += cd->name_entry_size;
}
}

PUT2(slot, 0, cd->bracount + 1);
memcpy(slot + 2, name, namelen);
slot[2+namelen] = 0;
}	}
}	}

/* In both pre-compile and compile, count the number of names we've	ptr++; /* Move past > or ' in both passes. */
encountered. */

cd->names_found++;
ptr++; /* Move past > or ' */
goto NUMBERED_GROUP;	goto NUMBERED_GROUP;


Line 5867 for (;; ptr++)	Line 7008 for (;; ptr++)

NAMED_REF_OR_RECURSE:	NAMED_REF_OR_RECURSE:
name = ++ptr;	name = ++ptr;
while ((cd->ctypes[*ptr] & ctype_word) != 0) ptr++;	if (IS_DIGIT(*ptr))
	{
	errorcodeptr = ERR84; / Group name must start with non-digit */
	goto FAILED;
	}
	while (MAX_255(ptr) && (cd->ctypes[ptr] & ctype_word) != 0) ptr++;
namelen = (int)(ptr - name);	namelen = (int)(ptr - name);

/* In the pre-compile phase, do a syntax check. We used to just set	/* In the pre-compile phase, do a syntax check. We used to just set
Line 5879 for (;; ptr++)	Line 7025 for (;; ptr++)

if (lengthptr != NULL)	if (lengthptr != NULL)
{	{
const uschar *temp;	named_group *ng;

if (namelen == 0)	if (namelen == 0)
{	{
*errorcodeptr = ERR62;	*errorcodeptr = ERR62;
goto FAILED;	goto FAILED;
}	}
if (*ptr != terminator)	if (*ptr != (pcre_uchar)terminator)
{	{
*errorcodeptr = ERR42;	*errorcodeptr = ERR42;
goto FAILED;	goto FAILED;
Line 5897 for (;; ptr++)	Line 7043 for (;; ptr++)
goto FAILED;	goto FAILED;
}	}

/* The name table does not exist in the first pass, so we cannot	/* The name table does not exist in the first pass; instead we must
do a simple search as in the code below. Instead, we have to scan the	scan the list of names encountered so far in order to get the
pattern to find the number. It is important that we scan it only as	number. If the name is not found, set the value to 0 for a forward
far as we have got because the syntax of named subpatterns has not	reference. */
been checked for the rest of the pattern, and find_parens() assumes
correct syntax. In any case, it's a waste of resources to scan
further. We stop the scan at the current point by temporarily
adjusting the value of cd->endpattern. */

temp = cd->end_pattern;	ng = cd->named_groups;
cd->end_pattern = ptr;	for (i = 0; i < cd->names_found; i++, ng++)
recno = find_parens(cd, name, namelen,	{
(options & PCRE_EXTENDED) != 0, utf8);	if (namelen == ng->length &&
cd->end_pattern = temp;	STRNCMP_UC_UC(name, ng->name, namelen) == 0)
if (recno < 0) recno = 0; /* Forward ref; set dummy number */	break;
	}
	recno = (i < cd->names_found)? ng->number : 0;

	/* Count named back references. */

	if (!is_recurse) cd->namedrefcount++;
}	}

/* In the real compile, seek the name in the table. We check the name	/* In the real compile, search the name table. We check the name
first, and then check that we have reached the end of the name in the	first, and then check that we have reached the end of the name in the
table. That way, if the name that is longer than any in the table,	table. That way, if the name is longer than any in the table, the
the comparison will fail without reading beyond the table entry. */	comparison will fail without reading beyond the table entry. */

else	else
{	{
slot = cd->name_table;	slot = cd->name_table;
for (i = 0; i < cd->names_found; i++)	for (i = 0; i < cd->names_found; i++)
{	{
if (strncmp((char )name, (char )slot+2, namelen) == 0 &&	if (STRNCMP_UC_UC(name, slot+IMM2_SIZE, namelen) == 0 &&
slot[2+namelen] == 0)	slot[IMM2_SIZE+namelen] == 0)
break;	break;
slot += cd->name_entry_size;	slot += cd->name_entry_size;
}	}

if (i < cd->names_found) /* Back reference */	if (i < cd->names_found)
{	{
recno = GET2(slot, 0);	recno = GET2(slot, 0);
}	}
else if ((recno = /* Forward back reference */	else
find_parens(cd, name, namelen,
(options & PCRE_EXTENDED) != 0, utf8)) <= 0)
{	{
*errorcodeptr = ERR15;	*errorcodeptr = ERR15;
goto FAILED;	goto FAILED;
}	}
}	}

/* In both phases, we can now go to the code than handles numerical	/* In both phases, for recursions, we can now go to the code than
recursion or backreferences. */	handles numerical recursion. */

if (is_recurse) goto HANDLE_RECURSION;	if (is_recurse) goto HANDLE_RECURSION;
else goto HANDLE_REFERENCE;

	/* In the second pass we must see if the name is duplicated. If so, we
	generate a different opcode. */

	if (lengthptr == NULL && cd->dupnames)
	{
	int count = 1;
	unsigned int index = i;
	pcre_uchar *cslot = slot + cd->name_entry_size;

	for (i++; i < cd->names_found; i++)
	{
	if (STRCMP_UC_UC(slot + IMM2_SIZE, cslot + IMM2_SIZE) != 0) break;
	count++;
	cslot += cd->name_entry_size;
	}

	if (count > 1)
	{
	if (firstcharflags == REQ_UNSET) firstcharflags = REQ_NONE;
	previous = code;
	*code++ = ((options & PCRE_CASELESS) != 0)? OP_DNREFI : OP_DNREF;
	PUT2INC(code, 0, index);
	PUT2INC(code, 0, count);

	/* Process each potentially referenced group. */

	for (; slot < cslot; slot += cd->name_entry_size)
	{
	open_capitem *oc;
	recno = GET2(slot, 0);
	cd->backref_map \|= (recno < 32)? (1 << recno) : 1;
	if (recno > cd->top_backref) cd->top_backref = recno;

	/* Check to see if this back reference is recursive, that it, it
	is inside the group that it references. A flag is set so that the
	group can be made atomic. */

	for (oc = cd->open_caps; oc != NULL; oc = oc->next)
	{
	if (oc->number == recno)
	{
	oc->flag = TRUE;
	break;
	}
	}
	}

	continue; /* End of back ref handling */
	}
	}

	/* First pass, or a non-duplicated name. */

	goto HANDLE_REFERENCE;


/* ------------------------------------------------------------ */	/* ------------------------------------------------------------ */
case CHAR_R: /* Recursion */	case CHAR_R: /* Recursion */
ptr++; /* Same as (?0) */	ptr++; /* Same as (?0) */
Line 5961 for (;; ptr++)	Line 7161 for (;; ptr++)
case CHAR_0: case CHAR_1: case CHAR_2: case CHAR_3: case CHAR_4:	case CHAR_0: case CHAR_1: case CHAR_2: case CHAR_3: case CHAR_4:
case CHAR_5: case CHAR_6: case CHAR_7: case CHAR_8: case CHAR_9:	case CHAR_5: case CHAR_6: case CHAR_7: case CHAR_8: case CHAR_9:
{	{
const uschar *called;	const pcre_uchar *called;
terminator = CHAR_RIGHT_PARENTHESIS;	terminator = CHAR_RIGHT_PARENTHESIS;

/* Come here from the \g<...> and \g'...' code (Oniguruma	/* Come here from the \g<...> and \g'...' code (Oniguruma
Line 5975 for (;; ptr++)	Line 7175 for (;; ptr++)
if ((refsign = *ptr) == CHAR_PLUS)	if ((refsign = *ptr) == CHAR_PLUS)
{	{
ptr++;	ptr++;
if ((digitab[*ptr] & ctype_digit) == 0)	if (!IS_DIGIT(*ptr))
{	{
*errorcodeptr = ERR63;	*errorcodeptr = ERR63;
goto FAILED;	goto FAILED;
Line 5983 for (;; ptr++)	Line 7183 for (;; ptr++)
}	}
else if (refsign == CHAR_MINUS)	else if (refsign == CHAR_MINUS)
{	{
if ((digitab[ptr[1]] & ctype_digit) == 0)	if (!IS_DIGIT(ptr[1]))
goto OTHER_CHAR_AFTER_QUERY;	goto OTHER_CHAR_AFTER_QUERY;
ptr++;	ptr++;
}	}

recno = 0;	recno = 0;
while((digitab[*ptr] & ctype_digit) != 0)	while(IS_DIGIT(*ptr))
recno = recno * 10 + *ptr++ - CHAR_0;	recno = recno * 10 + *ptr++ - CHAR_0;

if (*ptr != terminator)	if (*ptr != (pcre_uchar)terminator)
{	{
*errorcodeptr = ERR29;	*errorcodeptr = ERR29;
goto FAILED;	goto FAILED;
Line 6040 for (;; ptr++)	Line 7240 for (;; ptr++)
{	{
*code = OP_END;	*code = OP_END;
if (recno != 0)	if (recno != 0)
called = _pcre_find_bracket(cd->start_code, utf8, recno);	called = PRIV(find_bracket)(cd->start_code, utf, recno);

/* Forward reference */	/* Forward reference */

if (called == NULL)	if (called == NULL)
{	{
if (find_parens(cd, NULL, recno,	if (recno > cd->final_bracount)
(options & PCRE_EXTENDED) != 0, utf8) < 0)
{	{
*errorcodeptr = ERR15;	*errorcodeptr = ERR15;
goto FAILED;	goto FAILED;
Line 6077 for (;; ptr++)	Line 7276 for (;; ptr++)
conditional subpatterns will be picked up then. */	conditional subpatterns will be picked up then. */

else if (GET(called, 1) == 0 && cond_depth <= 0 &&	else if (GET(called, 1) == 0 && cond_depth <= 0 &&
could_be_empty(called, code, bcptr, utf8, cd))	could_be_empty(called, code, bcptr, utf, cd))
{	{
*errorcodeptr = ERR40;	*errorcodeptr = ERR40;
goto FAILED;	goto FAILED;
Line 6085 for (;; ptr++)	Line 7284 for (;; ptr++)
}	}

/* Insert the recursion/subroutine item. It does not have a set first	/* Insert the recursion/subroutine item. It does not have a set first
byte (relevant if it is repeated, because it will then be wrapped	character (relevant if it is repeated, because it will then be
with ONCE brackets). */	wrapped with ONCE brackets). */

*code = OP_RECURSE;	*code = OP_RECURSE;
PUT(code, 1, (int)(called - cd->start_code));	PUT(code, 1, (int)(called - cd->start_code));
code += 1 + LINK_SIZE;	code += 1 + LINK_SIZE;
groupsetfirstbyte = FALSE;	groupsetfirstchar = FALSE;
}	}

/* Can't determine a first byte now */	/* Can't determine a first byte now */

if (firstbyte == REQ_UNSET) firstbyte = REQ_NONE;	if (firstcharflags == REQ_UNSET) firstcharflags = REQ_NONE;
continue;	continue;


Line 6153 for (;; ptr++)	Line 7352 for (;; ptr++)
both phases.	both phases.

If we are not at the pattern start, reset the greedy defaults and the	If we are not at the pattern start, reset the greedy defaults and the
case value for firstbyte and reqbyte. */	case value for firstchar and reqchar. */

if (*ptr == CHAR_RIGHT_PARENTHESIS)	if (*ptr == CHAR_RIGHT_PARENTHESIS)
{	{
Line 6166 for (;; ptr++)	Line 7365 for (;; ptr++)
{	{
greedy_default = ((newoptions & PCRE_UNGREEDY) != 0);	greedy_default = ((newoptions & PCRE_UNGREEDY) != 0);
greedy_non_default = greedy_default ^ 1;	greedy_non_default = greedy_default ^ 1;
req_caseopt = ((newoptions & PCRE_CASELESS) != 0)? REQ_CASELESS : 0;	req_caseopt = ((newoptions & PCRE_CASELESS) != 0)? REQ_CASELESS:0;
}	}

/* Change options at this level, and pass them back for use	/* Change options at this level, and pass them back for use
Line 6203 for (;; ptr++)	Line 7402 for (;; ptr++)
NUMBERED_GROUP:	NUMBERED_GROUP:
cd->bracount += 1;	cd->bracount += 1;
PUT2(code, 1+LINK_SIZE, cd->bracount);	PUT2(code, 1+LINK_SIZE, cd->bracount);
skipbytes = 2;	skipbytes = IMM2_SIZE;
}	}

/* Process nested bracketed regex. Assertions used not to be repeatable,	/* Process nested bracketed regex. First check for parentheses nested too
but this was changed for Perl compatibility, so all kinds can now be	deeply. */
repeated. We copy code into a non-register variable (tempcode) in order to
be able to pass its address because some compilers complain otherwise. */

	if ((cd->parens_depth += 1) > PARENS_NEST_LIMIT)
	{
	*errorcodeptr = ERR82;
	goto FAILED;
	}

	/* Assertions used not to be repeatable, but this was changed for Perl
	compatibility, so all kinds can now be repeated. We copy code into a
	non-register variable (tempcode) in order to be able to pass its address
	because some compilers complain otherwise. */

previous = code; /* For handling repetition */	previous = code; /* For handling repetition */
*code = bravalue;	*code = bravalue;
tempcode = code;	tempcode = code;
Line 6229 for (;; ptr++)	Line 7437 for (;; ptr++)
skipbytes, /* Skip over bracket number */	skipbytes, /* Skip over bracket number */
cond_depth +	cond_depth +
((bravalue == OP_COND)?1:0), /* Depth of condition subpatterns */	((bravalue == OP_COND)?1:0), /* Depth of condition subpatterns */
&subfirstbyte, /* For possible first char */	&subfirstchar, /* For possible first char */
&subreqbyte, /* For possible last char */	&subfirstcharflags,
	&subreqchar, /* For possible last char */
	&subreqcharflags,
bcptr, /* Current branch chain */	bcptr, /* Current branch chain */
cd, /* Tables block */	cd, /* Tables block */
(lengthptr == NULL)? NULL : /* Actual compile phase */	(lengthptr == NULL)? NULL : /* Actual compile phase */
Line 6238 for (;; ptr++)	Line 7448 for (;; ptr++)
))	))
goto FAILED;	goto FAILED;

	cd->parens_depth -= 1;

/* If this was an atomic group and there are no capturing groups within it,	/* If this was an atomic group and there are no capturing groups within it,
generate OP_ONCE_NC instead of OP_ONCE. */	generate OP_ONCE_NC instead of OP_ONCE. */

Line 6258 for (;; ptr++)	Line 7470 for (;; ptr++)

if (bravalue == OP_COND && lengthptr == NULL)	if (bravalue == OP_COND && lengthptr == NULL)
{	{
uschar *tc = code;	pcre_uchar *tc = code;
int condcount = 0;	int condcount = 0;

do {	do {
Line 6281 for (;; ptr++)	Line 7493 for (;; ptr++)
}	}

/* A "normal" conditional group. If there is just one branch, we must not	/* A "normal" conditional group. If there is just one branch, we must not
make use of its firstbyte or reqbyte, because this is equivalent to an	make use of its firstchar or reqchar, because this is equivalent to an
empty second branch. */	empty second branch. */

else	else
Line 6291 for (;; ptr++)	Line 7503 for (;; ptr++)
*errorcodeptr = ERR27;	*errorcodeptr = ERR27;
goto FAILED;	goto FAILED;
}	}
if (condcount == 1) subfirstbyte = subreqbyte = REQ_NONE;	if (condcount == 1) subfirstcharflags = subreqcharflags = REQ_NONE;
}	}
}	}

Line 6335 for (;; ptr++)	Line 7547 for (;; ptr++)
/* Handle updating of the required and first characters for other types of	/* Handle updating of the required and first characters for other types of
group. Update for normal brackets of all kinds, and conditions with two	group. Update for normal brackets of all kinds, and conditions with two
branches (see code above). If the bracket is followed by a quantifier with	branches (see code above). If the bracket is followed by a quantifier with
zero repeat, we have to back off. Hence the definition of zeroreqbyte and	zero repeat, we have to back off. Hence the definition of zeroreqchar and
zerofirstbyte outside the main loop so that they can be accessed for the	zerofirstchar outside the main loop so that they can be accessed for the
back off. */	back off. */

zeroreqbyte = reqbyte;	zeroreqchar = reqchar;
zerofirstbyte = firstbyte;	zeroreqcharflags = reqcharflags;
groupsetfirstbyte = FALSE;	zerofirstchar = firstchar;
	zerofirstcharflags = firstcharflags;
	groupsetfirstchar = FALSE;

if (bravalue >= OP_ONCE)	if (bravalue >= OP_ONCE)
{	{
/* If we have not yet set a firstbyte in this branch, take it from the	/* If we have not yet set a firstchar in this branch, take it from the
subpattern, remembering that it was set here so that a repeat of more	subpattern, remembering that it was set here so that a repeat of more
than one can replicate it as reqbyte if necessary. If the subpattern has	than one can replicate it as reqchar if necessary. If the subpattern has
no firstbyte, set "none" for the whole branch. In both cases, a zero	no firstchar, set "none" for the whole branch. In both cases, a zero
repeat forces firstbyte to "none". */	repeat forces firstchar to "none". */

if (firstbyte == REQ_UNSET)	if (firstcharflags == REQ_UNSET)
{	{
if (subfirstbyte >= 0)	if (subfirstcharflags >= 0)
{	{
firstbyte = subfirstbyte;	firstchar = subfirstchar;
groupsetfirstbyte = TRUE;	firstcharflags = subfirstcharflags;
	groupsetfirstchar = TRUE;
}	}
else firstbyte = REQ_NONE;	else firstcharflags = REQ_NONE;
zerofirstbyte = REQ_NONE;	zerofirstcharflags = REQ_NONE;
}	}

/* If firstbyte was previously set, convert the subpattern's firstbyte	/* If firstchar was previously set, convert the subpattern's firstchar
into reqbyte if there wasn't one, using the vary flag that was in	into reqchar if there wasn't one, using the vary flag that was in
existence beforehand. */	existence beforehand. */

else if (subfirstbyte >= 0 && subreqbyte < 0)	else if (subfirstcharflags >= 0 && subreqcharflags < 0)
subreqbyte = subfirstbyte \| tempreqvary;	{
	subreqchar = subfirstchar;
	subreqcharflags = subfirstcharflags \| tempreqvary;
	}

/* If the subpattern set a required byte (or set a first byte that isn't	/* If the subpattern set a required byte (or set a first byte that isn't
really the first byte - see above), set it. */	really the first byte - see above), set it. */

if (subreqbyte >= 0) reqbyte = subreqbyte;	if (subreqcharflags >= 0)
	{
	reqchar = subreqchar;
	reqcharflags = subreqcharflags;
	}
}	}

/* For a forward assertion, we take the reqbyte, if set. This can be	/* For a forward assertion, we take the reqchar, if set. This can be
helpful if the pattern that follows the assertion doesn't set a different	helpful if the pattern that follows the assertion doesn't set a different
char. For example, it's useful for /(?=abcde).+/. We can't set firstbyte	char. For example, it's useful for /(?=abcde).+/. We can't set firstchar
for an assertion, however because it leads to incorrect effect for patterns	for an assertion, however because it leads to incorrect effect for patterns
such as /(?=a)a.+/ when the "real" "a" would then become a reqbyte instead	such as /(?=a)a.+/ when the "real" "a" would then become a reqchar instead
of a firstbyte. This is overcome by a scan at the end if there's no	of a firstchar. This is overcome by a scan at the end if there's no
firstbyte, looking for an asserted first char. */	firstchar, looking for an asserted first char. */

else if (bravalue == OP_ASSERT && subreqbyte >= 0) reqbyte = subreqbyte;	else if (bravalue == OP_ASSERT && subreqcharflags >= 0)
	{
	reqchar = subreqchar;
	reqcharflags = subreqcharflags;
	}
break; /* End of processing '(' */	break; /* End of processing '(' */


Line 6391 for (;; ptr++)	Line 7617 for (;; ptr++)
/* Handle metasequences introduced by \. For ones like \d, the ESC_ values	/* Handle metasequences introduced by \. For ones like \d, the ESC_ values
are arranged to be the negation of the corresponding OP_values in the	are arranged to be the negation of the corresponding OP_values in the
default case when PCRE_UCP is not set. For the back references, the values	default case when PCRE_UCP is not set. For the back references, the values
are ESC_REF plus the reference number. Only back references and those types	are negative the reference number. Only back references and those types
that consume a character may be repeated. We can test for values between	that consume a character may be repeated. We can test for values between
ESC_b and ESC_Z for the latter; this may have to change if any new ones are	ESC_b and ESC_Z for the latter; this may have to change if any new ones are
ever created. */	ever created. */

case CHAR_BACKSLASH:	case CHAR_BACKSLASH:
tempptr = ptr;	tempptr = ptr;
c = check_escape(&ptr, errorcodeptr, cd->bracount, options, FALSE);	escape = check_escape(&ptr, &ec, errorcodeptr, cd->bracount, options, FALSE);
if (*errorcodeptr != 0) goto FAILED;	if (*errorcodeptr != 0) goto FAILED;

if (c < 0)	if (escape == 0) /* The escape coded a single character */
	c = ec;
	else
{	{
if (-c == ESC_Q) /* Handle start of quoted string */	if (escape == ESC_Q) /* Handle start of quoted string */
{	{
if (ptr[1] == CHAR_BACKSLASH && ptr[2] == CHAR_E)	if (ptr[1] == CHAR_BACKSLASH && ptr[2] == CHAR_E)
ptr += 2; /* avoid empty string */	ptr += 2; /* avoid empty string */
Line 6411 for (;; ptr++)	Line 7639 for (;; ptr++)
continue;	continue;
}	}

if (-c == ESC_E) continue; /* Perl ignores an orphan \E */	if (escape == ESC_E) continue; /* Perl ignores an orphan \E */

/* For metasequences that actually match a character, we disable the	/* For metasequences that actually match a character, we disable the
setting of a first character if it hasn't already been set. */	setting of a first character if it hasn't already been set. */

if (firstbyte == REQ_UNSET && -c > ESC_b && -c < ESC_Z)	if (firstcharflags == REQ_UNSET && escape > ESC_b && escape < ESC_Z)
firstbyte = REQ_NONE;	firstcharflags = REQ_NONE;

/* Set values to reset to if this is followed by a zero repeat. */	/* Set values to reset to if this is followed by a zero repeat. */

zerofirstbyte = firstbyte;	zerofirstchar = firstchar;
zeroreqbyte = reqbyte;	zerofirstcharflags = firstcharflags;
	zeroreqchar = reqchar;
	zeroreqcharflags = reqcharflags;

/* \g<name> or \g'name' is a subroutine call by name and \g<n> or \g'n'	/* \g<name> or \g'name' is a subroutine call by name and \g<n> or \g'n'
is a subroutine call by number (Oniguruma syntax). In fact, the value	is a subroutine call by number (Oniguruma syntax). In fact, the value
-ESC_g is returned only for these cases. So we don't need to check for <	ESC_g is returned only for these cases. So we don't need to check for <
or ' if the value is -ESC_g. For the Perl syntax \g{n} the value is	or ' if the value is ESC_g. For the Perl syntax \g{n} the value is
-ESC_REF+n, and for the Perl syntax \g{name} the result is -ESC_k (as	-n, and for the Perl syntax \g{name} the result is ESC_k (as
that is a synonym for a named back reference). */	that is a synonym for a named back reference). */

if (-c == ESC_g)	if (escape == ESC_g)
{	{
const uschar *p;	const pcre_uchar *p;
	pcre_uint32 cf;

save_hwm = cd->hwm; /* Normally this is set when '(' is read */	save_hwm = cd->hwm; /* Normally this is set when '(' is read */
terminator = (*(++ptr) == CHAR_LESS_THAN_SIGN)?	terminator = (*(++ptr) == CHAR_LESS_THAN_SIGN)?
CHAR_GREATER_THAN_SIGN : CHAR_APOSTROPHE;	CHAR_GREATER_THAN_SIGN : CHAR_APOSTROPHE;

/* These two statements stop the compiler for warning about possibly	/* These two statements stop the compiler for warning about possibly
unset variables caused by the jump to HANDLE_NUMERICAL_RECURSION. In	unset variables caused by the jump to HANDLE_NUMERICAL_RECURSION. In
fact, because we actually check for a number below, the paths that	fact, because we do the check for a number below, the paths that
would actually be in error are never taken. */	would actually be in error are never taken. */

skipbytes = 0;	skipbytes = 0;
reset_bracount = FALSE;	reset_bracount = FALSE;

/* Test for a name */	/* If it's not a signed or unsigned number, treat it as a name. */

if (ptr[1] != CHAR_PLUS && ptr[1] != CHAR_MINUS)	cf = ptr[1];
	if (cf != CHAR_PLUS && cf != CHAR_MINUS && !IS_DIGIT(cf))
{	{
BOOL isnumber = TRUE;
for (p = ptr + 1; p != 0 && p != terminator; p++)
{
if ((cd->ctypes[*p] & ctype_digit) == 0) isnumber = FALSE;
if ((cd->ctypes[*p] & ctype_word) == 0) break;
}
if (*p != terminator)
{
*errorcodeptr = ERR57;
break;
}
if (isnumber)
{
ptr++;
goto HANDLE_NUMERICAL_RECURSION;
}
is_recurse = TRUE;	is_recurse = TRUE;
goto NAMED_REF_OR_RECURSE;	goto NAMED_REF_OR_RECURSE;
}	}

/* Test a signed number in angle brackets or quotes. */	/* Signed or unsigned number (cf = ptr[1]) is known to be plus or minus
	or a digit. */

p = ptr + 2;	p = ptr + 2;
while ((digitab[*p] & ctype_digit) != 0) p++;	while (IS_DIGIT(*p)) p++;
if (*p != terminator)	if (*p != (pcre_uchar)terminator)
{	{
*errorcodeptr = ERR57;	*errorcodeptr = ERR57;
break;	break;
Line 6486 for (;; ptr++)	Line 7704 for (;; ptr++)
/* \k<name> or \k'name' is a back reference by name (Perl syntax).	/* \k<name> or \k'name' is a back reference by name (Perl syntax).
We also support \k{name} (.NET syntax). */	We also support \k{name} (.NET syntax). */

if (-c == ESC_k)	if (escape == ESC_k)
{	{
if ((ptr[1] != CHAR_LESS_THAN_SIGN &&	if ((ptr[1] != CHAR_LESS_THAN_SIGN &&
ptr[1] != CHAR_APOSTROPHE && ptr[1] != CHAR_LEFT_CURLY_BRACKET))	ptr[1] != CHAR_APOSTROPHE && ptr[1] != CHAR_LEFT_CURLY_BRACKET))
Line 6501 for (;; ptr++)	Line 7719 for (;; ptr++)
goto NAMED_REF_OR_RECURSE;	goto NAMED_REF_OR_RECURSE;
}	}

/* Back references are handled specially; must disable firstbyte if	/* Back references are handled specially; must disable firstchar if
not set to cope with cases like (?=(\w+))\1: which would otherwise set	not set to cope with cases like (?=(\w+))\1: which would otherwise set
':' later. */	':' later. */

if (-c >= ESC_REF)	if (escape < 0)
{	{
open_capitem *oc;	open_capitem *oc;
recno = -c - ESC_REF;	recno = -escape;

HANDLE_REFERENCE: /* Come here from named backref handling */	/* Come here from named backref handling when the reference is to a
if (firstbyte == REQ_UNSET) firstbyte = REQ_NONE;	single group (i.e. not to a duplicated name. */

	HANDLE_REFERENCE:
	if (firstcharflags == REQ_UNSET) firstcharflags = REQ_NONE;
previous = code;	previous = code;
*code++ = ((options & PCRE_CASELESS) != 0)? OP_REFI : OP_REF;	*code++ = ((options & PCRE_CASELESS) != 0)? OP_REFI : OP_REF;
PUT2INC(code, 0, recno);	PUT2INC(code, 0, recno);
Line 6535 for (;; ptr++)	Line 7756 for (;; ptr++)
/* So are Unicode property matches, if supported. */	/* So are Unicode property matches, if supported. */

#ifdef SUPPORT_UCP	#ifdef SUPPORT_UCP
else if (-c == ESC_P \|\| -c == ESC_p)	else if (escape == ESC_P \|\| escape == ESC_p)
{	{
BOOL negated;	BOOL negated;
int pdata;	unsigned int ptype = 0, pdata = 0;
int ptype = get_ucp(&ptr, &negated, &pdata, errorcodeptr);	if (!get_ucp(&ptr, &negated, &ptype, &pdata, errorcodeptr))
if (ptype < 0) goto FAILED;	goto FAILED;
previous = code;	previous = code;
*code++ = ((-c == ESC_p) != negated)? OP_PROP : OP_NOTPROP;	*code++ = ((escape == ESC_p) != negated)? OP_PROP : OP_NOTPROP;
*code++ = ptype;	*code++ = ptype;
*code++ = pdata;	*code++ = pdata;
}	}
Line 6551 for (;; ptr++)	Line 7772 for (;; ptr++)
/* If Unicode properties are not supported, \X, \P, and \p are not	/* If Unicode properties are not supported, \X, \P, and \p are not
allowed. */	allowed. */

else if (-c == ESC_X \|\| -c == ESC_P \|\| -c == ESC_p)	else if (escape == ESC_X \|\| escape == ESC_P \|\| escape == ESC_p)
{	{
*errorcodeptr = ERR45;	*errorcodeptr = ERR45;
goto FAILED;	goto FAILED;
Line 6561 for (;; ptr++)	Line 7782 for (;; ptr++)
/* For the rest (including \X when Unicode properties are supported), we	/* For the rest (including \X when Unicode properties are supported), we
can obtain the OP value by negating the escape value in the default	can obtain the OP value by negating the escape value in the default
situation when PCRE_UCP is not set. When it is set, we substitute	situation when PCRE_UCP is not set. When it is set, we substitute
Unicode property tests. */	Unicode property tests. Note that \b and \B do a one-character
	lookbehind, and \A also behaves as if it does. */

else	else
{	{
	if ((escape == ESC_b \|\| escape == ESC_B \|\| escape == ESC_A) &&
	cd->max_lookbehind == 0)
	cd->max_lookbehind = 1;
#ifdef SUPPORT_UCP	#ifdef SUPPORT_UCP
if (-c >= ESC_DU && -c <= ESC_wu)	if (escape >= ESC_DU && escape <= ESC_wu)
{	{
nestptr = ptr + 1; /* Where to resume */	nestptr = ptr + 1; /* Where to resume */
ptr = substitutes[-c - ESC_DU] - 1; /* Just before substitute */	ptr = substitutes[escape - ESC_DU] - 1; /* Just before substitute */
}	}
else	else
#endif	#endif
Line 6577 for (;; ptr++)	Line 7802 for (;; ptr++)
so that it works in DFA mode and in lookbehinds. */	so that it works in DFA mode and in lookbehinds. */

{	{
previous = (-c > ESC_b && -c < ESC_Z)? code : NULL;	previous = (escape > ESC_b && escape < ESC_Z)? code : NULL;
*code++ = (!utf8 && c == -ESC_C)? OP_ALLANY : -c;	*code++ = (!utf && escape == ESC_C)? OP_ALLANY : escape;
}	}
}	}
continue;	continue;
Line 6588 for (;; ptr++)	Line 7813 for (;; ptr++)
a value > 127. We set its representation in the length/buffer, and then	a value > 127. We set its representation in the length/buffer, and then
handle it as a data character. */	handle it as a data character. */

#ifdef SUPPORT_UTF8	#if defined SUPPORT_UTF && !defined COMPILE_PCRE32
if (utf8 && c > 127)	if (utf && c > MAX_VALUE_FOR_SINGLE_CHAR)
mclength = _pcre_ord2utf8(c, mcbuffer);	mclength = PRIV(ord2utf)(c, mcbuffer);
else	else
#endif	#endif

Line 6603 for (;; ptr++)	Line 7828 for (;; ptr++)

/* ===================================================================*/	/* ===================================================================*/
/* Handle a literal character. It is guaranteed not to be whitespace or #	/* Handle a literal character. It is guaranteed not to be whitespace or #
when the extended flag is set. If we are in UTF-8 mode, it may be a	when the extended flag is set. If we are in a UTF mode, it may be a
multi-byte literal character. */	multi-unit literal character. */

default:	default:
NORMAL_CHAR:	NORMAL_CHAR:
mclength = 1;	mclength = 1;
mcbuffer[0] = c;	mcbuffer[0] = c;

#ifdef SUPPORT_UTF8	#ifdef SUPPORT_UTF
if (utf8 && c >= 0xc0)	if (utf && HAS_EXTRALEN(c))
{	ACROSSCHAR(TRUE, ptr[1], mcbuffer[mclength++] = *(++ptr));
while ((ptr[1] & 0xc0) == 0x80)
mcbuffer[mclength++] = *(++ptr);
}
#endif	#endif

/* At this point we have the character's bytes in mcbuffer, and the length	/* At this point we have the character's bytes in mcbuffer, and the length
Line 6624 for (;; ptr++)	Line 7846 for (;; ptr++)

ONE_CHAR:	ONE_CHAR:
previous = code;	previous = code;

	/* For caseless UTF-8 mode when UCP support is available, check whether
	this character has more than one other case. If so, generate a special
	OP_PROP item instead of OP_CHARI. */

	#ifdef SUPPORT_UCP
	if (utf && (options & PCRE_CASELESS) != 0)
	{
	GETCHAR(c, mcbuffer);
	if ((c = UCD_CASESET(c)) != 0)
	{
	*code++ = OP_PROP;
	*code++ = PT_CLIST;
	*code++ = c;
	if (firstcharflags == REQ_UNSET)
	firstcharflags = zerofirstcharflags = REQ_NONE;
	break;
	}
	}
	#endif

	/* Caseful matches, or not one of the multicase characters. */

*code++ = ((options & PCRE_CASELESS) != 0)? OP_CHARI : OP_CHAR;	*code++ = ((options & PCRE_CASELESS) != 0)? OP_CHARI : OP_CHAR;
for (c = 0; c < mclength; c++) *code++ = mcbuffer[c];	for (c = 0; c < mclength; c++) *code++ = mcbuffer[c];

Line 6634 for (;; ptr++)	Line 7879 for (;; ptr++)

/* Set the first and required bytes appropriately. If no previous first	/* Set the first and required bytes appropriately. If no previous first
byte, set it from this character, but revert to none on a zero repeat.	byte, set it from this character, but revert to none on a zero repeat.
Otherwise, leave the firstbyte value alone, and don't change it on a zero	Otherwise, leave the firstchar value alone, and don't change it on a zero
repeat. */	repeat. */

if (firstbyte == REQ_UNSET)	if (firstcharflags == REQ_UNSET)
{	{
zerofirstbyte = REQ_NONE;	zerofirstcharflags = REQ_NONE;
zeroreqbyte = reqbyte;	zeroreqchar = reqchar;
	zeroreqcharflags = reqcharflags;

/* If the character is more than one byte long, we can set firstbyte	/* If the character is more than one byte long, we can set firstchar
only if it is not to be matched caselessly. */	only if it is not to be matched caselessly. */

if (mclength == 1 \|\| req_caseopt == 0)	if (mclength == 1 \|\| req_caseopt == 0)
{	{
firstbyte = mcbuffer[0] \| req_caseopt;	firstchar = mcbuffer[0] \| req_caseopt;
if (mclength != 1) reqbyte = code[-1] \| cd->req_varyopt;	firstchar = mcbuffer[0];
	firstcharflags = req_caseopt;

	if (mclength != 1)
	{
	reqchar = code[-1];
	reqcharflags = cd->req_varyopt;
	}
}	}
else firstbyte = reqbyte = REQ_NONE;	else firstcharflags = reqcharflags = REQ_NONE;
}	}

/* firstbyte was previously set; we can set reqbyte only if the length is	/* firstchar was previously set; we can set reqchar only if the length is
1 or the matching is caseful. */	1 or the matching is caseful. */

else	else
{	{
zerofirstbyte = firstbyte;	zerofirstchar = firstchar;
zeroreqbyte = reqbyte;	zerofirstcharflags = firstcharflags;
	zeroreqchar = reqchar;
	zeroreqcharflags = reqcharflags;
if (mclength == 1 \|\| req_caseopt == 0)	if (mclength == 1 \|\| req_caseopt == 0)
reqbyte = code[-1] \| req_caseopt \| cd->req_varyopt;	{
	reqchar = code[-1];
	reqcharflags = req_caseopt \| cd->req_varyopt;
	}
}	}

break; /* End of literal character handling */	break; /* End of literal character handling */
Line 6680 return FALSE;	Line 7938 return FALSE;




/*************************************************	/*************************************************
* Compile sequence of alternatives *	* Compile sequence of alternatives *
*************************************************/	*************************************************/
Line 6693 out the amount of memory needed, as well as during the	Line 7950 out the amount of memory needed, as well as during the
value of lengthptr distinguishes the two phases.	value of lengthptr distinguishes the two phases.

Arguments:	Arguments:
options option bits, including any changes for this subpattern	options option bits, including any changes for this subpattern
codeptr -> the address of the current code pointer	codeptr -> the address of the current code pointer
ptrptr -> the address of the current pattern pointer	ptrptr -> the address of the current pattern pointer
errorcodeptr -> pointer to error code variable	errorcodeptr -> pointer to error code variable
lookbehind TRUE if this is a lookbehind assertion	lookbehind TRUE if this is a lookbehind assertion
reset_bracount TRUE to reset the count for each branch	reset_bracount TRUE to reset the count for each branch
skipbytes skip this many bytes at start (for brackets and OP_COND)	skipbytes skip this many bytes at start (for brackets and OP_COND)
cond_depth depth of nesting for conditional subpatterns	cond_depth depth of nesting for conditional subpatterns
firstbyteptr place to put the first required character, or a negative number	firstcharptr place to put the first required character
reqbyteptr place to put the last required character, or a negative number	firstcharflagsptr place to put the first character flags, or a negative number
bcptr pointer to the chain of currently open branches	reqcharptr place to put the last required character
cd points to the data block with tables pointers etc.	reqcharflagsptr place to put the last required character flags, or a negative number
lengthptr NULL during the real compile phase	bcptr pointer to the chain of currently open branches
points to length accumulator during pre-compile phase	cd points to the data block with tables pointers etc.
	lengthptr NULL during the real compile phase
	points to length accumulator during pre-compile phase

Returns: TRUE on success	Returns: TRUE on success
*/	*/

static BOOL	static BOOL
compile_regex(int options, uschar codeptr, const uschar ptrptr,	compile_regex(int options, pcre_uchar codeptr, const pcre_uchar ptrptr,
int *errorcodeptr, BOOL lookbehind, BOOL reset_bracount, int skipbytes,	int *errorcodeptr, BOOL lookbehind, BOOL reset_bracount, int skipbytes,
int cond_depth, int firstbyteptr, int reqbyteptr, branch_chain *bcptr,	int cond_depth,
compile_data cd, int lengthptr)	pcre_uint32 firstcharptr, pcre_int32 firstcharflagsptr,
	pcre_uint32 reqcharptr, pcre_int32 reqcharflagsptr,
	branch_chain bcptr, compile_data cd, int *lengthptr)
{	{
const uschar ptr = ptrptr;	const pcre_uchar ptr = ptrptr;
uschar code = codeptr;	pcre_uchar code = codeptr;
uschar *last_branch = code;	pcre_uchar *last_branch = code;
uschar *start_bracket = code;	pcre_uchar *start_bracket = code;
uschar *reverse_count = NULL;	pcre_uchar *reverse_count = NULL;
open_capitem capitem;	open_capitem capitem;
int capnumber = 0;	int capnumber = 0;
int firstbyte, reqbyte;	pcre_uint32 firstchar, reqchar;
int branchfirstbyte, branchreqbyte;	pcre_int32 firstcharflags, reqcharflags;
	pcre_uint32 branchfirstchar, branchreqchar;
	pcre_int32 branchfirstcharflags, branchreqcharflags;
int length;	int length;
int orig_bracount;	unsigned int orig_bracount;
int max_bracount;	unsigned int max_bracount;
branch_chain bc;	branch_chain bc;

bc.outer = bcptr;	bc.outer = bcptr;
bc.current_branch = code;	bc.current_branch = code;

firstbyte = reqbyte = REQ_UNSET;	firstchar = reqchar = 0;
	firstcharflags = reqcharflags = REQ_UNSET;

/* Accumulate the length for use in the pre-compile phase. Start with the	/* Accumulate the length for use in the pre-compile phase. Start with the
length of the BRA and KET and any extra bytes that are required at the	length of the BRA and KET and any extra bytes that are required at the
Line 6793 for (;;)	Line 8057 for (;;)
/* Now compile the branch; in the pre-compile phase its length gets added	/* Now compile the branch; in the pre-compile phase its length gets added
into the length. */	into the length. */

if (!compile_branch(&options, &code, &ptr, errorcodeptr, &branchfirstbyte,	if (!compile_branch(&options, &code, &ptr, errorcodeptr, &branchfirstchar,
&branchreqbyte, &bc, cond_depth, cd,	&branchfirstcharflags, &branchreqchar, &branchreqcharflags, &bc,
(lengthptr == NULL)? NULL : &length))	cond_depth, cd, (lengthptr == NULL)? NULL : &length))
{	{
*ptrptr = ptr;	*ptrptr = ptr;
return FALSE;	return FALSE;
Line 6810 for (;;)	Line 8074 for (;;)

if (lengthptr == NULL)	if (lengthptr == NULL)
{	{
/* If this is the first branch, the firstbyte and reqbyte values for the	/* If this is the first branch, the firstchar and reqchar values for the
branch become the values for the regex. */	branch become the values for the regex. */

if (*last_branch != OP_ALT)	if (*last_branch != OP_ALT)
{	{
firstbyte = branchfirstbyte;	firstchar = branchfirstchar;
reqbyte = branchreqbyte;	firstcharflags = branchfirstcharflags;
	reqchar = branchreqchar;
	reqcharflags = branchreqcharflags;
}	}

/* If this is not the first branch, the first char and reqbyte have to	/* If this is not the first branch, the first char and reqchar have to
match the values from all the previous branches, except that if the	match the values from all the previous branches, except that if the
previous value for reqbyte didn't have REQ_VARY set, it can still match,	previous value for reqchar didn't have REQ_VARY set, it can still match,
and we set REQ_VARY for the regex. */	and we set REQ_VARY for the regex. */

else	else
{	{
/* If we previously had a firstbyte, but it doesn't match the new branch,	/* If we previously had a firstchar, but it doesn't match the new branch,
we have to abandon the firstbyte for the regex, but if there was	we have to abandon the firstchar for the regex, but if there was
previously no reqbyte, it takes on the value of the old firstbyte. */	previously no reqchar, it takes on the value of the old firstchar. */

if (firstbyte >= 0 && firstbyte != branchfirstbyte)	if (firstcharflags >= 0 &&
	(firstcharflags != branchfirstcharflags \|\| firstchar != branchfirstchar))
{	{
if (reqbyte < 0) reqbyte = firstbyte;	if (reqcharflags < 0)
firstbyte = REQ_NONE;	{
	reqchar = firstchar;
	reqcharflags = firstcharflags;
	}
	firstcharflags = REQ_NONE;
}	}

/* If we (now or from before) have no firstbyte, a firstbyte from the	/* If we (now or from before) have no firstchar, a firstchar from the
branch becomes a reqbyte if there isn't a branch reqbyte. */	branch becomes a reqchar if there isn't a branch reqchar. */

if (firstbyte < 0 && branchfirstbyte >= 0 && branchreqbyte < 0)	if (firstcharflags < 0 && branchfirstcharflags >= 0 && branchreqcharflags < 0)
branchreqbyte = branchfirstbyte;	{
	branchreqchar = branchfirstchar;
	branchreqcharflags = branchfirstcharflags;
	}

/* Now ensure that the reqbytes match */	/* Now ensure that the reqchars match */

if ((reqbyte & ~REQ_VARY) != (branchreqbyte & ~REQ_VARY))	if (((reqcharflags & ~REQ_VARY) != (branchreqcharflags & ~REQ_VARY)) \|\|
reqbyte = REQ_NONE;	reqchar != branchreqchar)
else reqbyte \|= branchreqbyte; /* To "or" REQ_VARY */	reqcharflags = REQ_NONE;
	else
	{
	reqchar = branchreqchar;
	reqcharflags \|= branchreqcharflags; /* To "or" REQ_VARY */
	}
}	}

/* If lookbehind, check that this branch matches a fixed-length string, and	/* If lookbehind, check that this branch matches a fixed-length string, and
Line 6875 for (;;)	Line 8154 for (;;)
*ptrptr = ptr;	*ptrptr = ptr;
return FALSE;	return FALSE;
}	}
else { PUT(reverse_count, 0, fixed_length); }	else
	{
	if (fixed_length > cd->max_lookbehind)
	cd->max_lookbehind = fixed_length;
	PUT(reverse_count, 0, fixed_length);
	}
}	}
}	}

Line 6916 for (;;)	Line 8200 for (;;)
if (cd->open_caps->flag)	if (cd->open_caps->flag)
{	{
memmove(start_bracket + 1 + LINK_SIZE, start_bracket,	memmove(start_bracket + 1 + LINK_SIZE, start_bracket,
code - start_bracket);	IN_UCHARS(code - start_bracket));
*start_bracket = OP_ONCE;	*start_bracket = OP_ONCE;
code += 1 + LINK_SIZE;	code += 1 + LINK_SIZE;
PUT(start_bracket, 1, (int)(code - start_bracket));	PUT(start_bracket, 1, (int)(code - start_bracket));
Line 6936 for (;;)	Line 8220 for (;;)

*codeptr = code;	*codeptr = code;
*ptrptr = ptr;	*ptrptr = ptr;
*firstbyteptr = firstbyte;	*firstcharptr = firstchar;
*reqbyteptr = reqbyte;	*firstcharflagsptr = firstcharflags;
	*reqcharptr = reqchar;
	*reqcharflagsptr = reqcharflags;
if (lengthptr != NULL)	if (lengthptr != NULL)
{	{
if (OFLOW_MAX - *lengthptr < length)	if (OFLOW_MAX - *lengthptr < length)
Line 7007 and the highest back reference was greater than or equ	Line 8293 and the highest back reference was greater than or equ
However, by keeping a bitmap of the first 31 back references, we can catch some	However, by keeping a bitmap of the first 31 back references, we can catch some
of the more common cases more precisely.	of the more common cases more precisely.

	... A second exception is when the .* appears inside an atomic group, because
	this prevents the number of characters it matches from being adjusted.

Arguments:	Arguments:
code points to start of expression (the bracket)	code points to start of expression (the bracket)
bracket_map a bitmap of which brackets we are inside while testing; this	bracket_map a bitmap of which brackets we are inside while testing; this
handles up to substring 31; after that we just have to take	handles up to substring 31; after that we just have to take
the less precise approach	the less precise approach
backref_map the back reference bitmap	cd points to the compile data block
	atomcount atomic group level

Returns: TRUE or FALSE	Returns: TRUE or FALSE
*/	*/

static BOOL	static BOOL
is_anchored(register const uschar *code, unsigned int bracket_map,	is_anchored(register const pcre_uchar *code, unsigned int bracket_map,
unsigned int backref_map)	compile_data *cd, int atomcount)
{	{
do {	do {
const uschar scode = first_significant_code(code + _pcre_OP_lengths[code],	const pcre_uchar *scode = first_significant_code(
FALSE);	code + PRIV(OP_lengths)[*code], FALSE);
register int op = *scode;	register int op = *scode;

/* Non-capturing brackets */	/* Non-capturing brackets */
Line 7031 do {	Line 8321 do {
if (op == OP_BRA \|\| op == OP_BRAPOS \|\|	if (op == OP_BRA \|\| op == OP_BRAPOS \|\|
op == OP_SBRA \|\| op == OP_SBRAPOS)	op == OP_SBRA \|\| op == OP_SBRAPOS)
{	{
if (!is_anchored(scode, bracket_map, backref_map)) return FALSE;	if (!is_anchored(scode, bracket_map, cd, atomcount)) return FALSE;
}	}

/* Capturing brackets */	/* Capturing brackets */
Line 7041 do {	Line 8331 do {
{	{
int n = GET2(scode, 1+LINK_SIZE);	int n = GET2(scode, 1+LINK_SIZE);
int new_map = bracket_map \| ((n < 32)? (1 << n) : 1);	int new_map = bracket_map \| ((n < 32)? (1 << n) : 1);
if (!is_anchored(scode, new_map, backref_map)) return FALSE;	if (!is_anchored(scode, new_map, cd, atomcount)) return FALSE;
}	}

/* Other brackets */	/* Positive forward assertions and conditions */

else if (op == OP_ASSERT \|\| op == OP_ONCE \|\| op == OP_ONCE_NC \|\|	else if (op == OP_ASSERT \|\| op == OP_COND)
op == OP_COND)
{	{
if (!is_anchored(scode, bracket_map, backref_map)) return FALSE;	if (!is_anchored(scode, bracket_map, cd, atomcount)) return FALSE;
}	}

	/* Atomic groups */

	else if (op == OP_ONCE \|\| op == OP_ONCE_NC)
	{
	if (!is_anchored(scode, bracket_map, cd, atomcount + 1))
	return FALSE;
	}

/* .* is not anchored unless DOTALL is set (which generates OP_ALLANY) and	/* .* is not anchored unless DOTALL is set (which generates OP_ALLANY) and
it isn't in brackets that are or may be referenced. */	it isn't in brackets that are or may be referenced or inside an atomic
	group. */

else if ((op == OP_TYPESTAR \|\| op == OP_TYPEMINSTAR \|\|	else if ((op == OP_TYPESTAR \|\| op == OP_TYPEMINSTAR \|\|
op == OP_TYPEPOSSTAR))	op == OP_TYPEPOSSTAR))
{	{
if (scode[1] != OP_ALLANY \|\| (bracket_map & backref_map) != 0)	if (scode[1] != OP_ALLANY \|\| (bracket_map & cd->backref_map) != 0 \|\|
	atomcount > 0 \|\| cd->had_pruneorskip)
return FALSE;	return FALSE;
}	}

/* Check for explicit anchoring */	/* Check for explicit anchoring */

else if (op != OP_SOD && op != OP_SOM && op != OP_CIRC) return FALSE;	else if (op != OP_SOD && op != OP_SOM && op != OP_CIRC) return FALSE;

code += GET(code, 1);	code += GET(code, 1);
}	}
while (code == OP_ALT); / Loop for each alternative */	while (code == OP_ALT); / Loop for each alternative */
Line 7082 return TRUE;	Line 8382 return TRUE;
matching and for non-DOTALL patterns that start with .* (which must start at	matching and for non-DOTALL patterns that start with .* (which must start at
the beginning or after \n). As in the case of is_anchored() (see above), we	the beginning or after \n). As in the case of is_anchored() (see above), we
have to take account of back references to capturing brackets that contain .*	have to take account of back references to capturing brackets that contain .*
because in that case we can't make the assumption.	because in that case we can't make the assumption. Also, the appearance of .*
	inside atomic brackets or in a pattern that contains PRUNE or SKIP does not
	count, because once again the assumption no longer holds.

Arguments:	Arguments:
code points to start of expression (the bracket)	code points to start of expression (the bracket)
bracket_map a bitmap of which brackets we are inside while testing; this	bracket_map a bitmap of which brackets we are inside while testing; this
handles up to substring 31; after that we just have to take	handles up to substring 31; after that we just have to take
the less precise approach	the less precise approach
backref_map the back reference bitmap	cd points to the compile data
	atomcount atomic group level

Returns: TRUE or FALSE	Returns: TRUE or FALSE
*/	*/

static BOOL	static BOOL
is_startline(const uschar *code, unsigned int bracket_map,	is_startline(const pcre_uchar *code, unsigned int bracket_map,
unsigned int backref_map)	compile_data *cd, int atomcount)
{	{
do {	do {
const uschar scode = first_significant_code(code + _pcre_OP_lengths[code],	const pcre_uchar *scode = first_significant_code(
FALSE);	code + PRIV(OP_lengths)[*code], FALSE);
register int op = *scode;	register int op = *scode;

/* If we are at the start of a conditional assertion group, both the	/* If we are at the start of a conditional assertion group, both the
Line 7111 do {	Line 8414 do {
if (op == OP_COND)	if (op == OP_COND)
{	{
scode += 1 + LINK_SIZE;	scode += 1 + LINK_SIZE;
if (*scode == OP_CALLOUT) scode += _pcre_OP_lengths[OP_CALLOUT];	if (*scode == OP_CALLOUT) scode += PRIV(OP_lengths)[OP_CALLOUT];
switch (*scode)	switch (*scode)
{	{
case OP_CREF:	case OP_CREF:
case OP_NCREF:	case OP_DNCREF:
case OP_RREF:	case OP_RREF:
case OP_NRREF:	case OP_DNRREF:
case OP_DEF:	case OP_DEF:
return FALSE;	return FALSE;

default: /* Assertion */	default: /* Assertion */
if (!is_startline(scode, bracket_map, backref_map)) return FALSE;	if (!is_startline(scode, bracket_map, cd, atomcount)) return FALSE;
do scode += GET(scode, 1); while (*scode == OP_ALT);	do scode += GET(scode, 1); while (*scode == OP_ALT);
scode += 1 + LINK_SIZE;	scode += 1 + LINK_SIZE;
break;	break;
Line 7136 do {	Line 8439 do {
if (op == OP_BRA \|\| op == OP_BRAPOS \|\|	if (op == OP_BRA \|\| op == OP_BRAPOS \|\|
op == OP_SBRA \|\| op == OP_SBRAPOS)	op == OP_SBRA \|\| op == OP_SBRAPOS)
{	{
if (!is_startline(scode, bracket_map, backref_map)) return FALSE;	if (!is_startline(scode, bracket_map, cd, atomcount)) return FALSE;
}	}

/* Capturing brackets */	/* Capturing brackets */
Line 7146 do {	Line 8449 do {
{	{
int n = GET2(scode, 1+LINK_SIZE);	int n = GET2(scode, 1+LINK_SIZE);
int new_map = bracket_map \| ((n < 32)? (1 << n) : 1);	int new_map = bracket_map \| ((n < 32)? (1 << n) : 1);
if (!is_startline(scode, new_map, backref_map)) return FALSE;	if (!is_startline(scode, new_map, cd, atomcount)) return FALSE;
}	}

/* Other brackets */	/* Positive forward assertions */

else if (op == OP_ASSERT \|\| op == OP_ONCE \|\| op == OP_ONCE_NC)	else if (op == OP_ASSERT)
{	{
if (!is_startline(scode, bracket_map, backref_map)) return FALSE;	if (!is_startline(scode, bracket_map, cd, atomcount)) return FALSE;
}	}

/* .* means "start at start or after \n" if it isn't in brackets that	/* Atomic brackets */
may be referenced. */

	else if (op == OP_ONCE \|\| op == OP_ONCE_NC)
	{
	if (!is_startline(scode, bracket_map, cd, atomcount + 1)) return FALSE;
	}

	/* .* means "start at start or after \n" if it isn't in atomic brackets or
	brackets that may be referenced, as long as the pattern does not contain
	PRUNE or SKIP, because these break the feature. Consider, for example,
	/.?a(PRUNE)b/ with the subject "aab", which matches "ab", i.e. not at the
	start of a line. */

else if (op == OP_TYPESTAR \|\| op == OP_TYPEMINSTAR \|\| op == OP_TYPEPOSSTAR)	else if (op == OP_TYPESTAR \|\| op == OP_TYPEMINSTAR \|\| op == OP_TYPEPOSSTAR)
{	{
if (scode[1] != OP_ANY \|\| (bracket_map & backref_map) != 0) return FALSE;	if (scode[1] != OP_ANY \|\| (bracket_map & cd->backref_map) != 0 \|\|
	atomcount > 0 \|\| cd->had_pruneorskip)
	return FALSE;
}	}

/* Check for explicit circumflex */	/* Check for explicit circumflex; anything else gives a FALSE result. Note
	in particular that this includes atomic brackets OP_ONCE and OP_ONCE_NC
	because the number of characters matched by .* cannot be adjusted inside
	them. */

else if (op != OP_CIRC && op != OP_CIRCM) return FALSE;	else if (op != OP_CIRC && op != OP_CIRCM) return FALSE;

Line 7186 return TRUE;	Line 8504 return TRUE;
discarded, because they can cause conflicts with actual literals that follow.	discarded, because they can cause conflicts with actual literals that follow.
However, if we end up without a first char setting for an unanchored pattern,	However, if we end up without a first char setting for an unanchored pattern,
it is worth scanning the regex to see if there is an initial asserted first	it is worth scanning the regex to see if there is an initial asserted first
char. If all branches start with the same asserted char, or with a bracket all	char. If all branches start with the same asserted char, or with a
of whose alternatives start with the same asserted char (recurse ad lib), then	non-conditional bracket all of whose alternatives start with the same asserted
we return that char, otherwise -1.	char (recurse ad lib), then we return that char, with the flags set to zero or
	REQ_CASELESS; otherwise return zero with REQ_NONE in the flags.

Arguments:	Arguments:
code points to start of expression (the bracket)	code points to start of expression (the bracket)
	flags points to the first char flags, or to REQ_NONE
inassert TRUE if in an assertion	inassert TRUE if in an assertion

Returns: -1 or the fixed first char	Returns: the fixed first char, or 0 with REQ_NONE in flags
*/	*/

static int	static pcre_uint32
find_firstassertedchar(const uschar *code, BOOL inassert)	find_firstassertedchar(const pcre_uchar code, pcre_int32 flags,
	BOOL inassert)
{	{
register int c = -1;	register pcre_uint32 c = 0;
	int cflags = REQ_NONE;

	*flags = REQ_NONE;
do {	do {
int d;	pcre_uint32 d;
	int dflags;
int xl = (code == OP_CBRA \|\| code == OP_SCBRA \|\|	int xl = (code == OP_CBRA \|\| code == OP_SCBRA \|\|
code == OP_CBRAPOS \|\| code == OP_SCBRAPOS)? 2:0;	code == OP_CBRAPOS \|\| code == OP_SCBRAPOS)? IMM2_SIZE:0;
const uschar *scode = first_significant_code(code + 1+LINK_SIZE + xl, TRUE);	const pcre_uchar *scode = first_significant_code(code + 1+LINK_SIZE + xl,
register int op = *scode;	TRUE);
	register pcre_uchar op = *scode;

switch(op)	switch(op)
{	{
default:	default:
return -1;	return 0;

case OP_BRA:	case OP_BRA:
case OP_BRAPOS:	case OP_BRAPOS:
Line 7222 do {	Line 8548 do {
case OP_ASSERT:	case OP_ASSERT:
case OP_ONCE:	case OP_ONCE:
case OP_ONCE_NC:	case OP_ONCE_NC:
case OP_COND:	d = find_firstassertedchar(scode, &dflags, op == OP_ASSERT);
if ((d = find_firstassertedchar(scode, op == OP_ASSERT)) < 0)	if (dflags < 0)
return -1;	return 0;
if (c < 0) c = d; else if (c != d) return -1;	if (cflags < 0) { c = d; cflags = dflags; } else if (c != d \|\| cflags != dflags) return 0;
break;	break;

case OP_EXACT:	case OP_EXACT:
scode += 2;	scode += IMM2_SIZE;
/* Fall through */	/* Fall through */

case OP_CHAR:	case OP_CHAR:
case OP_PLUS:	case OP_PLUS:
case OP_MINPLUS:	case OP_MINPLUS:
case OP_POSPLUS:	case OP_POSPLUS:
if (!inassert) return -1;	if (!inassert) return 0;
if (c < 0) c = scode[1];	if (cflags < 0) { c = scode[1]; cflags = 0; }
else if (c != scode[1]) return -1;	else if (c != scode[1]) return 0;
break;	break;

case OP_EXACTI:	case OP_EXACTI:
scode += 2;	scode += IMM2_SIZE;
/* Fall through */	/* Fall through */

case OP_CHARI:	case OP_CHARI:
case OP_PLUSI:	case OP_PLUSI:
case OP_MINPLUSI:	case OP_MINPLUSI:
case OP_POSPLUSI:	case OP_POSPLUSI:
if (!inassert) return -1;	if (!inassert) return 0;
if (c < 0) c = scode[1] \| REQ_CASELESS;	if (cflags < 0) { c = scode[1]; cflags = REQ_CASELESS; }
else if (c != scode[1]) return -1;	else if (c != scode[1]) return 0;
break;	break;
}	}

code += GET(code, 1);	code += GET(code, 1);
}	}
while (*code == OP_ALT);	while (*code == OP_ALT);

	*flags = cflags;
return c;	return c;
}	}



/*************************************************	/*************************************************
	* Add an entry to the name/number table *
	*************************************************/

	/* This function is called between compiling passes to add an entry to the
	name/number table, maintaining alphabetical order. Checking for permitted
	and forbidden duplicates has already been done.

	Arguments:
	cd the compile data block
	name the name to add
	length the length of the name
	groupno the group number

	Returns: nothing
	*/

	static void
	add_name(compile_data cd, const pcre_uchar name, int length,
	unsigned int groupno)
	{
	int i;
	pcre_uchar *slot = cd->name_table;

	for (i = 0; i < cd->names_found; i++)
	{
	int crc = memcmp(name, slot+IMM2_SIZE, IN_UCHARS(length));
	if (crc == 0 && slot[IMM2_SIZE+length] != 0)
	crc = -1; /* Current name is a substring */

	/* Make space in the table and break the loop for an earlier name. For a
	duplicate or later name, carry on. We do this for duplicates so that in the
	simple case (when ?(\| is not used) they are in order of their numbers. In all
	cases they are in the order in which they appear in the pattern. */

	if (crc < 0)
	{
	memmove(slot + cd->name_entry_size, slot,
	IN_UCHARS((cd->names_found - i) * cd->name_entry_size));
	break;
	}

	/* Continue the loop for a later or duplicate name */

	slot += cd->name_entry_size;
	}

	PUT2(slot, 0, groupno);
	memcpy(slot + IMM2_SIZE, name, IN_UCHARS(length));
	slot[IMM2_SIZE + length] = 0;
	cd->names_found++;
	}



	/*************************************************
* Compile a Regular Expression *	* Compile a Regular Expression *
*************************************************/	*************************************************/

Line 7285 Returns: pointer to compiled data block, or NUL	Line 8668 Returns: pointer to compiled data block, or NUL
with errorptr and erroroffset set	with errorptr and erroroffset set
*/	*/

	#if defined COMPILE_PCRE8
PCRE_EXP_DEFN pcre * PCRE_CALL_CONVENTION	PCRE_EXP_DEFN pcre * PCRE_CALL_CONVENTION
pcre_compile(const char pattern, int options, const char *errorptr,	pcre_compile(const char pattern, int options, const char *errorptr,
int erroroffset, const unsigned char tables)	int erroroffset, const unsigned char tables)
	#elif defined COMPILE_PCRE16
	PCRE_EXP_DEFN pcre16 * PCRE_CALL_CONVENTION
	pcre16_compile(PCRE_SPTR16 pattern, int options, const char **errorptr,
	int erroroffset, const unsigned char tables)
	#elif defined COMPILE_PCRE32
	PCRE_EXP_DEFN pcre32 * PCRE_CALL_CONVENTION
	pcre32_compile(PCRE_SPTR32 pattern, int options, const char **errorptr,
	int erroroffset, const unsigned char tables)
	#endif
{	{
	#if defined COMPILE_PCRE8
return pcre_compile2(pattern, options, NULL, errorptr, erroroffset, tables);	return pcre_compile2(pattern, options, NULL, errorptr, erroroffset, tables);
	#elif defined COMPILE_PCRE16
	return pcre16_compile2(pattern, options, NULL, errorptr, erroroffset, tables);
	#elif defined COMPILE_PCRE32
	return pcre32_compile2(pattern, options, NULL, errorptr, erroroffset, tables);
	#endif
}	}


	#if defined COMPILE_PCRE8
PCRE_EXP_DEFN pcre * PCRE_CALL_CONVENTION	PCRE_EXP_DEFN pcre * PCRE_CALL_CONVENTION
pcre_compile2(const char pattern, int options, int errorcodeptr,	pcre_compile2(const char pattern, int options, int errorcodeptr,
const char *errorptr, int erroroffset, const unsigned char *tables)	const char *errorptr, int erroroffset, const unsigned char *tables)
	#elif defined COMPILE_PCRE16
	PCRE_EXP_DEFN pcre16 * PCRE_CALL_CONVENTION
	pcre16_compile2(PCRE_SPTR16 pattern, int options, int *errorcodeptr,
	const char *errorptr, int erroroffset, const unsigned char *tables)
	#elif defined COMPILE_PCRE32
	PCRE_EXP_DEFN pcre32 * PCRE_CALL_CONVENTION
	pcre32_compile2(PCRE_SPTR32 pattern, int options, int *errorcodeptr,
	const char *errorptr, int erroroffset, const unsigned char *tables)
	#endif
{	{
real_pcre *re;	REAL_PCRE *re;
int length = 1; /* For final END opcode */	int length = 1; /* For final END opcode */
int firstbyte, reqbyte, newline;	pcre_int32 firstcharflags, reqcharflags;
	pcre_uint32 firstchar, reqchar;
	pcre_uint32 limit_match = PCRE_UINT32_MAX;
	pcre_uint32 limit_recursion = PCRE_UINT32_MAX;
	int newline;
int errorcode = 0;	int errorcode = 0;
int skipatstart = 0;	int skipatstart = 0;
BOOL utf8;	BOOL utf;
	BOOL never_utf = FALSE;
size_t size;	size_t size;
uschar *code;	pcre_uchar *code;
const uschar *codestart;	const pcre_uchar *codestart;
const uschar *ptr;	const pcre_uchar *ptr;
compile_data compile_block;	compile_data compile_block;
compile_data *cd = &compile_block;	compile_data *cd = &compile_block;

Line 7317 this purpose. The same space is used in the second pha	Line 8731 this purpose. The same space is used in the second pha
to fill in forward references to subpatterns. That may overflow, in which case	to fill in forward references to subpatterns. That may overflow, in which case
new memory is obtained from malloc(). */	new memory is obtained from malloc(). */

uschar cworkspace[COMPILE_WORK_SIZE];	pcre_uchar cworkspace[COMPILE_WORK_SIZE];

	/* This vector is used for remembering name groups during the pre-compile. In a
	similar way to cworkspace, it can be expanded using malloc() if necessary. */

	named_group named_groups[NAMED_GROUP_LIST_SIZE];

/* Set this early so that early errors get offset 0. */	/* Set this early so that early errors get offset 0. */

ptr = (const uschar *)pattern;	ptr = (const pcre_uchar *)pattern;

/* We can't pass back an error message if errorptr is NULL; I guess the best we	/* We can't pass back an error message if errorptr is NULL; I guess the best we
can do is just return NULL, but we can set a code value if there is a code	can do is just return NULL, but we can set a code value if there is a code
Line 7348 if (erroroffset == NULL)	Line 8767 if (erroroffset == NULL)

/* Set up pointers to the individual character tables */	/* Set up pointers to the individual character tables */

if (tables == NULL) tables = _pcre_default_tables;	if (tables == NULL) tables = PRIV(default_tables);
cd->lcc = tables + lcc_offset;	cd->lcc = tables + lcc_offset;
cd->fcc = tables + fcc_offset;	cd->fcc = tables + fcc_offset;
cd->cbits = tables + cbits_offset;	cd->cbits = tables + cbits_offset;
Line 7362 if ((options & ~PUBLIC_COMPILE_OPTIONS) != 0)	Line 8781 if ((options & ~PUBLIC_COMPILE_OPTIONS) != 0)
goto PCRE_EARLY_ERROR_RETURN;	goto PCRE_EARLY_ERROR_RETURN;
}	}

	/* If PCRE_NEVER_UTF is set, remember it. */

	if ((options & PCRE_NEVER_UTF) != 0) never_utf = TRUE;

/* Check for global one-time settings at the start of the pattern, and remember	/* Check for global one-time settings at the start of the pattern, and remember
the offset for later. */	the offset for later. */

	cd->external_flags = 0; /* Initialize here for LIMIT_MATCH/RECURSION */

while (ptr[skipatstart] == CHAR_LEFT_PARENTHESIS &&	while (ptr[skipatstart] == CHAR_LEFT_PARENTHESIS &&
ptr[skipatstart+1] == CHAR_ASTERISK)	ptr[skipatstart+1] == CHAR_ASTERISK)
{	{
int newnl = 0;	int newnl = 0;
int newbsr = 0;	int newbsr = 0;

if (strncmp((char *)(ptr+skipatstart+2), STRING_UTF8_RIGHTPAR, 5) == 0)	/* For completeness and backward compatibility, (*UTFn) is supported in the
	relevant libraries, but (*UTF) is generic and always supported. Note that
	PCRE_UTF8 == PCRE_UTF16 == PCRE_UTF32. */

	#ifdef COMPILE_PCRE8
	if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_UTF8_RIGHTPAR, 5) == 0)
{ skipatstart += 7; options \|= PCRE_UTF8; continue; }	{ skipatstart += 7; options \|= PCRE_UTF8; continue; }
else if (strncmp((char *)(ptr+skipatstart+2), STRING_UCP_RIGHTPAR, 4) == 0)	#endif
	#ifdef COMPILE_PCRE16
	if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_UTF16_RIGHTPAR, 6) == 0)
	{ skipatstart += 8; options \|= PCRE_UTF16; continue; }
	#endif
	#ifdef COMPILE_PCRE32
	if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_UTF32_RIGHTPAR, 6) == 0)
	{ skipatstart += 8; options \|= PCRE_UTF32; continue; }
	#endif

	else if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_UTF_RIGHTPAR, 4) == 0)
	{ skipatstart += 6; options \|= PCRE_UTF8; continue; }
	else if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_UCP_RIGHTPAR, 4) == 0)
{ skipatstart += 6; options \|= PCRE_UCP; continue; }	{ skipatstart += 6; options \|= PCRE_UCP; continue; }
else if (strncmp((char *)(ptr+skipatstart+2), STRING_NO_START_OPT_RIGHTPAR, 13) == 0)	else if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_NO_AUTO_POSSESS_RIGHTPAR, 16) == 0)
	{ skipatstart += 18; options \|= PCRE_NO_AUTO_POSSESS; continue; }
	else if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_NO_START_OPT_RIGHTPAR, 13) == 0)
{ skipatstart += 15; options \|= PCRE_NO_START_OPTIMIZE; continue; }	{ skipatstart += 15; options \|= PCRE_NO_START_OPTIMIZE; continue; }

if (strncmp((char *)(ptr+skipatstart+2), STRING_CR_RIGHTPAR, 3) == 0)	else if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_LIMIT_MATCH_EQ, 12) == 0)
	{
	pcre_uint32 c = 0;
	int p = skipatstart + 14;
	while (isdigit(ptr[p]))
	{
	if (c > PCRE_UINT32_MAX / 10 - 1) break; /* Integer overflow */
	c = c*10 + ptr[p++] - CHAR_0;
	}
	if (ptr[p++] != CHAR_RIGHT_PARENTHESIS) break;
	if (c < limit_match)
	{
	limit_match = c;
	cd->external_flags \|= PCRE_MLSET;
	}
	skipatstart = p;
	continue;
	}

	else if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_LIMIT_RECURSION_EQ, 16) == 0)
	{
	pcre_uint32 c = 0;
	int p = skipatstart + 18;
	while (isdigit(ptr[p]))
	{
	if (c > PCRE_UINT32_MAX / 10 - 1) break; /* Integer overflow check */
	c = c*10 + ptr[p++] - CHAR_0;
	}
	if (ptr[p++] != CHAR_RIGHT_PARENTHESIS) break;
	if (c < limit_recursion)
	{
	limit_recursion = c;
	cd->external_flags \|= PCRE_RLSET;
	}
	skipatstart = p;
	continue;
	}

	if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_CR_RIGHTPAR, 3) == 0)
{ skipatstart += 5; newnl = PCRE_NEWLINE_CR; }	{ skipatstart += 5; newnl = PCRE_NEWLINE_CR; }
else if (strncmp((char *)(ptr+skipatstart+2), STRING_LF_RIGHTPAR, 3) == 0)	else if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_LF_RIGHTPAR, 3) == 0)
{ skipatstart += 5; newnl = PCRE_NEWLINE_LF; }	{ skipatstart += 5; newnl = PCRE_NEWLINE_LF; }
else if (strncmp((char *)(ptr+skipatstart+2), STRING_CRLF_RIGHTPAR, 5) == 0)	else if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_CRLF_RIGHTPAR, 5) == 0)
{ skipatstart += 7; newnl = PCRE_NEWLINE_CR + PCRE_NEWLINE_LF; }	{ skipatstart += 7; newnl = PCRE_NEWLINE_CR + PCRE_NEWLINE_LF; }
else if (strncmp((char *)(ptr+skipatstart+2), STRING_ANY_RIGHTPAR, 4) == 0)	else if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_ANY_RIGHTPAR, 4) == 0)
{ skipatstart += 6; newnl = PCRE_NEWLINE_ANY; }	{ skipatstart += 6; newnl = PCRE_NEWLINE_ANY; }
else if (strncmp((char *)(ptr+skipatstart+2), STRING_ANYCRLF_RIGHTPAR, 8) == 0)	else if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_ANYCRLF_RIGHTPAR, 8) == 0)
{ skipatstart += 10; newnl = PCRE_NEWLINE_ANYCRLF; }	{ skipatstart += 10; newnl = PCRE_NEWLINE_ANYCRLF; }

else if (strncmp((char *)(ptr+skipatstart+2), STRING_BSR_ANYCRLF_RIGHTPAR, 12) == 0)	else if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_BSR_ANYCRLF_RIGHTPAR, 12) == 0)
{ skipatstart += 14; newbsr = PCRE_BSR_ANYCRLF; }	{ skipatstart += 14; newbsr = PCRE_BSR_ANYCRLF; }
else if (strncmp((char *)(ptr+skipatstart+2), STRING_BSR_UNICODE_RIGHTPAR, 12) == 0)	else if (STRNCMP_UC_C8(ptr+skipatstart+2, STRING_BSR_UNICODE_RIGHTPAR, 12) == 0)
{ skipatstart += 14; newbsr = PCRE_BSR_UNICODE; }	{ skipatstart += 14; newbsr = PCRE_BSR_UNICODE; }

if (newnl != 0)	if (newnl != 0)
Line 7401 while (ptr[skipatstart] == CHAR_LEFT_PARENTHESIS &&	Line 8883 while (ptr[skipatstart] == CHAR_LEFT_PARENTHESIS &&
else break;	else break;
}	}

utf8 = (options & PCRE_UTF8) != 0;	/* PCRE_UTF(16\|32) have the same value as PCRE_UTF8. */
	utf = (options & PCRE_UTF8) != 0;
	if (utf && never_utf)
	{
	errorcode = ERR78;
	goto PCRE_EARLY_ERROR_RETURN2;
	}

/* Can't support UTF8 unless PCRE has been compiled to include the code. The	/* Can't support UTF unless PCRE has been compiled to include the code. The
return of an error code from _pcre_valid_utf8() is a new feature, introduced in	return of an error code from PRIV(valid_utf)() is a new feature, introduced in
release 8.13. It is passed back from pcre_[dfa_]exec(), but at the moment is	release 8.13. It is passed back from pcre_[dfa_]exec(), but at the moment is
not used here. */	not used here. */

#ifdef SUPPORT_UTF8	#ifdef SUPPORT_UTF
if (utf8 && (options & PCRE_NO_UTF8_CHECK) == 0 &&	if (utf && (options & PCRE_NO_UTF8_CHECK) == 0 &&
(errorcode = _pcre_valid_utf8((USPTR)pattern, -1, erroroffset)) != 0)	(errorcode = PRIV(valid_utf)((PCRE_PUCHAR)pattern, -1, erroroffset)) != 0)
{	{
	#if defined COMPILE_PCRE8
errorcode = ERR44;	errorcode = ERR44;
	#elif defined COMPILE_PCRE16
	errorcode = ERR74;
	#elif defined COMPILE_PCRE32
	errorcode = ERR77;
	#endif
goto PCRE_EARLY_ERROR_RETURN2;	goto PCRE_EARLY_ERROR_RETURN2;
}	}
#else	#else
if (utf8)	if (utf)
{	{
errorcode = ERR32;	errorcode = ERR32;
goto PCRE_EARLY_ERROR_RETURN;	goto PCRE_EARLY_ERROR_RETURN;
Line 7492 cd->backref_map = 0;	Line 8986 cd->backref_map = 0;
/* Reflect pattern for debugging output */	/* Reflect pattern for debugging output */

DPRINTF(("------------------------------------------------------------------\n"));	DPRINTF(("------------------------------------------------------------------\n"));
DPRINTF(("%s\n", pattern));	#ifdef PCRE_DEBUG
	print_puchar(stdout, (PCRE_PUCHAR)pattern);
	#endif
	DPRINTF(("\n"));

/* Pretend to compile the pattern while actually just accumulating the length	/* Pretend to compile the pattern while actually just accumulating the length
of memory required. This behaviour is triggered by passing a non-NULL final	of memory required. This behaviour is triggered by passing a non-NULL final
Line 7505 cd->bracount = cd->final_bracount = 0;	Line 9002 cd->bracount = cd->final_bracount = 0;
cd->names_found = 0;	cd->names_found = 0;
cd->name_entry_size = 0;	cd->name_entry_size = 0;
cd->name_table = NULL;	cd->name_table = NULL;
	cd->dupnames = FALSE;
	cd->namedrefcount = 0;
cd->start_code = cworkspace;	cd->start_code = cworkspace;
cd->hwm = cworkspace;	cd->hwm = cworkspace;
cd->start_workspace = cworkspace;	cd->start_workspace = cworkspace;
cd->workspace_size = COMPILE_WORK_SIZE;	cd->workspace_size = COMPILE_WORK_SIZE;
cd->start_pattern = (const uschar *)pattern;	cd->named_groups = named_groups;
cd->end_pattern = (const uschar *)(pattern + strlen(pattern));	cd->named_group_list_size = NAMED_GROUP_LIST_SIZE;
	cd->start_pattern = (const pcre_uchar *)pattern;
	cd->end_pattern = (const pcre_uchar )(pattern + STRLEN_UC((const pcre_uchar )pattern));
cd->req_varyopt = 0;	cd->req_varyopt = 0;
	cd->parens_depth = 0;
	cd->assert_depth = 0;
	cd->max_lookbehind = 0;
cd->external_options = options;	cd->external_options = options;
cd->external_flags = 0;
cd->open_caps = NULL;	cd->open_caps = NULL;

/* Now do the pre-compile. On error, errorcode will be set non-zero, so we	/* Now do the pre-compile. On error, errorcode will be set non-zero, so we
Line 7525 outside can help speed up starting point checks. */	Line 9028 outside can help speed up starting point checks. */
ptr += skipatstart;	ptr += skipatstart;
code = cworkspace;	code = cworkspace;
*code = OP_BRA;	*code = OP_BRA;

(void)compile_regex(cd->external_options, &code, &ptr, &errorcode, FALSE,	(void)compile_regex(cd->external_options, &code, &ptr, &errorcode, FALSE,
FALSE, 0, 0, &firstbyte, &reqbyte, NULL, cd, &length);	FALSE, 0, 0, &firstchar, &firstcharflags, &reqchar, &reqcharflags, NULL,
	cd, &length);
if (errorcode != 0) goto PCRE_EARLY_ERROR_RETURN;	if (errorcode != 0) goto PCRE_EARLY_ERROR_RETURN;

DPRINTF(("end pre-compile: length=%d workspace=%d\n", length,	DPRINTF(("end pre-compile: length=%d workspace=%d\n", length,
cd->hwm - cworkspace));	(int)(cd->hwm - cworkspace)));

if (length > MAX_PATTERN_SIZE)	if (length > MAX_PATTERN_SIZE)
{	{
Line 7538 if (length > MAX_PATTERN_SIZE)	Line 9043 if (length > MAX_PATTERN_SIZE)
goto PCRE_EARLY_ERROR_RETURN;	goto PCRE_EARLY_ERROR_RETURN;
}	}

/* Compute the size of data block needed and get it, either from malloc or	/* If there are groups with duplicate names and there are also references by
externally provided function. Integer overflow should no longer be possible	name, we must allow for the possibility of named references to duplicated
because nowadays we limit the maximum value of cd->names_found and	groups. These require an extra data item each. */
cd->name_entry_size. */

size = length + sizeof(real_pcre) + cd->names_found * cd->name_entry_size;	if (cd->dupnames && cd->namedrefcount > 0)
re = (real_pcre *)(pcre_malloc)(size);	length += cd->namedrefcount * IMM2_SIZE * sizeof(pcre_uchar);

	/* Compute the size of the data block for storing the compiled pattern. Integer
	overflow should no longer be possible because nowadays we limit the maximum
	value of cd->names_found and cd->name_entry_size. */

	size = sizeof(REAL_PCRE) +
	(length + cd->names_found * cd->name_entry_size) * sizeof(pcre_uchar);

	/* Get the memory. */

	re = (REAL_PCRE *)(PUBL(malloc))(size);
if (re == NULL)	if (re == NULL)
{	{
errorcode = ERR21;	errorcode = ERR21;
Line 7562 re->magic_number = MAGIC_NUMBER;	Line 9076 re->magic_number = MAGIC_NUMBER;
re->size = (int)size;	re->size = (int)size;
re->options = cd->external_options;	re->options = cd->external_options;
re->flags = cd->external_flags;	re->flags = cd->external_flags;
re->dummy1 = 0;	re->limit_match = limit_match;
re->first_byte = 0;	re->limit_recursion = limit_recursion;
re->req_byte = 0;	re->first_char = 0;
re->name_table_offset = sizeof(real_pcre);	re->req_char = 0;
	re->name_table_offset = sizeof(REAL_PCRE) / sizeof(pcre_uchar);
re->name_entry_size = cd->name_entry_size;	re->name_entry_size = cd->name_entry_size;
re->name_count = cd->names_found;	re->name_count = cd->names_found;
re->ref_count = 0;	re->ref_count = 0;
re->tables = (tables == _pcre_default_tables)? NULL : tables;	re->tables = (tables == PRIV(default_tables))? NULL : tables;
re->nullpad = NULL;	re->nullpad = NULL;
	#ifdef COMPILE_PCRE32
	re->dummy = 0;
	#else
	re->dummy1 = re->dummy2 = re->dummy3 = 0;
	#endif

/* The starting points of the name/number translation table and of the code are	/* The starting points of the name/number translation table and of the code are
passed around in the compile data block. The start/end pattern and initial	passed around in the compile data block. The start/end pattern and initial
Line 7580 field; this time it's used for remembering forward ref	Line 9100 field; this time it's used for remembering forward ref
*/	*/

cd->final_bracount = cd->bracount; /* Save for checking forward references */	cd->final_bracount = cd->bracount; /* Save for checking forward references */
	cd->parens_depth = 0;
cd->assert_depth = 0;	cd->assert_depth = 0;
cd->bracount = 0;	cd->bracount = 0;
cd->names_found = 0;	cd->max_lookbehind = 0;
cd->name_table = (uschar *)re + re->name_table_offset;	cd->name_table = (pcre_uchar *)re + re->name_table_offset;
codestart = cd->name_table + re->name_entry_size * re->name_count;	codestart = cd->name_table + re->name_entry_size * re->name_count;
cd->start_code = codestart;	cd->start_code = codestart;
cd->hwm = (uschar *)(cd->start_workspace);	cd->hwm = (pcre_uchar *)(cd->start_workspace);
cd->req_varyopt = 0;	cd->req_varyopt = 0;
cd->had_accept = FALSE;	cd->had_accept = FALSE;
	cd->had_pruneorskip = FALSE;
cd->check_lookbehind = FALSE;	cd->check_lookbehind = FALSE;
cd->open_caps = NULL;	cd->open_caps = NULL;

	/* If any named groups were found, create the name/number table from the list
	created in the first pass. */

	if (cd->names_found > 0)
	{
	int i = cd->names_found;
	named_group *ng = cd->named_groups;
	cd->names_found = 0;
	for (; i > 0; i--, ng++)
	add_name(cd, ng->name, ng->length, ng->number);
	if (cd->named_group_list_size > NAMED_GROUP_LIST_SIZE)
	(PUBL(free))((void *)cd->named_groups);
	}

/* Set up a starting, non-extracting bracket, then compile the expression. On	/* Set up a starting, non-extracting bracket, then compile the expression. On
error, errorcode will be set non-zero, so we don't need to look at the result	error, errorcode will be set non-zero, so we don't need to look at the result
of the function here. */	of the function here. */

ptr = (const uschar *)pattern + skipatstart;	ptr = (const pcre_uchar *)pattern + skipatstart;
code = (uschar *)codestart;	code = (pcre_uchar *)codestart;
*code = OP_BRA;	*code = OP_BRA;
(void)compile_regex(re->options, &code, &ptr, &errorcode, FALSE, FALSE, 0, 0,	(void)compile_regex(re->options, &code, &ptr, &errorcode, FALSE, FALSE, 0, 0,
&firstbyte, &reqbyte, NULL, cd, NULL);	&firstchar, &firstcharflags, &reqchar, &reqcharflags, NULL, cd, NULL);
re->top_bracket = cd->bracount;	re->top_bracket = cd->bracount;
re->top_backref = cd->top_backref;	re->top_backref = cd->top_backref;
re->flags = cd->external_flags;	re->max_lookbehind = cd->max_lookbehind;
	re->flags = cd->external_flags \| PCRE_MODE;

if (cd->had_accept) reqbyte = REQ_NONE; /* Must disable after (ACCEPT) /	if (cd->had_accept)
	{
	reqchar = 0; /* Must disable after (ACCEPT) /
	reqcharflags = REQ_NONE;
	}

/* If not reached end of pattern on success, there's an excess bracket. */	/* If not reached end of pattern on success, there's an excess bracket. */

if (errorcode == 0 && *ptr != 0) errorcode = ERR22;	if (errorcode == 0 && *ptr != CHAR_NULL) errorcode = ERR22;

/* Fill in the terminating state and check for disastrous overflow, but	/* Fill in the terminating state and check for disastrous overflow, but
if debugging, leave the test till after things are printed out. */	if debugging, leave the test till after things are printed out. */
Line 7620 if debugging, leave the test till after things are pri	Line 9161 if debugging, leave the test till after things are pri
if (code - codestart > length) errorcode = ERR23;	if (code - codestart > length) errorcode = ERR23;
#endif	#endif

	#ifdef SUPPORT_VALGRIND
	/* If the estimated length exceeds the really used length, mark the extra
	allocated memory as unaddressable, so that any out-of-bound reads can be
	detected. */
	VALGRIND_MAKE_MEM_NOACCESS(code, (length - (code - codestart)) * sizeof(pcre_uchar));
	#endif

/* Fill in any forward references that are required. There may be repeated	/* Fill in any forward references that are required. There may be repeated
references; optimize for them, as searching a large regex takes time. */	references; optimize for them, as searching a large regex takes time. */

if (cd->hwm > cd->start_workspace)	if (cd->hwm > cd->start_workspace)
{	{
int prev_recno = -1;	int prev_recno = -1;
const uschar *groupptr = NULL;	const pcre_uchar *groupptr = NULL;
while (errorcode == 0 && cd->hwm > cd->start_workspace)	while (errorcode == 0 && cd->hwm > cd->start_workspace)
{	{
int offset, recno;	int offset, recno;
Line 7635 if (cd->hwm > cd->start_workspace)	Line 9183 if (cd->hwm > cd->start_workspace)
recno = GET(codestart, offset);	recno = GET(codestart, offset);
if (recno != prev_recno)	if (recno != prev_recno)
{	{
groupptr = _pcre_find_bracket(codestart, utf8, recno);	groupptr = PRIV(find_bracket)(codestart, utf, recno);
prev_recno = recno;	prev_recno = recno;
}	}
if (groupptr == NULL) errorcode = ERR53;	if (groupptr == NULL) errorcode = ERR53;
else PUT(((uschar *)codestart), offset, (int)(groupptr - codestart));	else PUT(((pcre_uchar *)codestart), offset, (int)(groupptr - codestart));
}	}
}	}

/* If the workspace had to be expanded, free the new memory. */	/* If the workspace had to be expanded, free the new memory. Set the pointer to
	NULL to indicate that forward references have been filled in. */

if (cd->workspace_size > COMPILE_WORK_SIZE)	if (cd->workspace_size > COMPILE_WORK_SIZE)
(pcre_free)((void *)cd->start_workspace);	(PUBL(free))((void *)cd->start_workspace);
	cd->start_workspace = NULL;

/* Give an error if there's back reference to a non-existent capturing	/* Give an error if there's back reference to a non-existent capturing
subpattern. */	subpattern. */

if (errorcode == 0 && re->top_backref > re->top_bracket) errorcode = ERR15;	if (errorcode == 0 && re->top_backref > re->top_bracket) errorcode = ERR15;

	/* Unless disabled, check whether single character iterators can be
	auto-possessified. The function overwrites the appropriate opcode values. */

	if ((options & PCRE_NO_AUTO_POSSESS) == 0)
	auto_possessify((pcre_uchar *)codestart, utf, cd);

/* If there were any lookbehind assertions that contained OP_RECURSE	/* If there were any lookbehind assertions that contained OP_RECURSE
(recursions or subroutine calls), a flag is set for them to be checked here,	(recursions or subroutine calls), a flag is set for them to be checked here,
because they may contain forward references. Actual recursions can't be fixed	because they may contain forward references. Actual recursions cannot be fixed
length, but subroutine calls can. It is done like this so that those without	length, but subroutine calls can. It is done like this so that those without
OP_RECURSE that are not fixed length get a diagnosic with a useful offset. The	OP_RECURSE that are not fixed length get a diagnosic with a useful offset. The
exceptional ones forgo this. We scan the pattern to check that they are fixed	exceptional ones forgo this. We scan the pattern to check that they are fixed
Line 7663 length, and set their lengths. */	Line 9219 length, and set their lengths. */

if (cd->check_lookbehind)	if (cd->check_lookbehind)
{	{
uschar cc = (uschar )codestart;	pcre_uchar cc = (pcre_uchar )codestart;

/* Loop, searching for OP_REVERSE items, and process those that do not have	/* Loop, searching for OP_REVERSE items, and process those that do not have
their length set. (Actually, it will also re-process any that have a length	their length set. (Actually, it will also re-process any that have a length
of zero, but that is a pathological case, and it does no harm.) When we find	of zero, but that is a pathological case, and it does no harm.) When we find
one, we temporarily terminate the branch it is in while we scan it. */	one, we temporarily terminate the branch it is in while we scan it. */

for (cc = (uschar *)_pcre_find_bracket(codestart, utf8, -1);	for (cc = (pcre_uchar *)PRIV(find_bracket)(codestart, utf, -1);
cc != NULL;	cc != NULL;
cc = (uschar *)_pcre_find_bracket(cc, utf8, -1))	cc = (pcre_uchar *)PRIV(find_bracket)(cc, utf, -1))
{	{
if (GET(cc, 1) == 0)	if (GET(cc, 1) == 0)
{	{
int fixed_length;	int fixed_length;
uschar *be = cc - 1 - LINK_SIZE + GET(cc, -LINK_SIZE);	pcre_uchar *be = cc - 1 - LINK_SIZE + GET(cc, -LINK_SIZE);
int end_op = *be;	int end_op = *be;
*be = OP_END;	*be = OP_END;
fixed_length = find_fixedlength(cc, (re->options & PCRE_UTF8) != 0, TRUE,	fixed_length = find_fixedlength(cc, (re->options & PCRE_UTF8) != 0, TRUE,
Line 7690 if (cd->check_lookbehind)	Line 9246 if (cd->check_lookbehind)
(fixed_length == -4)? ERR70 : ERR25;	(fixed_length == -4)? ERR70 : ERR25;
break;	break;
}	}
	if (fixed_length > cd->max_lookbehind) cd->max_lookbehind = fixed_length;
PUT(cc, 1, fixed_length);	PUT(cc, 1, fixed_length);
}	}
cc += 1 + LINK_SIZE;	cc += 1 + LINK_SIZE;
Line 7700 if (cd->check_lookbehind)	Line 9257 if (cd->check_lookbehind)

if (errorcode != 0)	if (errorcode != 0)
{	{
(pcre_free)(re);	(PUBL(free))(re);
PCRE_EARLY_ERROR_RETURN:	PCRE_EARLY_ERROR_RETURN:
erroroffset = (int)(ptr - (const uschar )pattern);	erroroffset = (int)(ptr - (const pcre_uchar )pattern);
PCRE_EARLY_ERROR_RETURN2:	PCRE_EARLY_ERROR_RETURN2:
*errorptr = find_error_text(errorcode);	*errorptr = find_error_text(errorcode);
if (errorcodeptr != NULL) *errorcodeptr = errorcode;	if (errorcodeptr != NULL) *errorcodeptr = errorcode;
Line 7710 if (errorcode != 0)	Line 9267 if (errorcode != 0)
}	}

/* If the anchored option was not passed, set the flag if we can determine that	/* If the anchored option was not passed, set the flag if we can determine that
the pattern is anchored by virtue of ^ characters or \A or anything else (such	the pattern is anchored by virtue of ^ characters or \A or anything else, such
as starting with .* when DOTALL is set).	as starting with non-atomic .* when DOTALL is set and there are no occurrences
	of PRUNE or SKIP.

Otherwise, if we know what the first byte has to be, save it, because that	Otherwise, if we know what the first byte has to be, save it, because that
speeds up unanchored matches no end. If not, see if we can set the	speeds up unanchored matches no end. If not, see if we can set the
PCRE_STARTLINE flag. This is helpful for multiline matches when all branches	PCRE_STARTLINE flag. This is helpful for multiline matches when all branches
start with ^. and also when all branches start with .* for non-DOTALL matches.	start with ^. and also when all branches start with non-atomic .* for
*/	non-DOTALL matches when PRUNE and SKIP are not present. /

if ((re->options & PCRE_ANCHORED) == 0)	if ((re->options & PCRE_ANCHORED) == 0)
{	{
if (is_anchored(codestart, 0, cd->backref_map))	if (is_anchored(codestart, 0, cd, 0)) re->options \|= PCRE_ANCHORED;
re->options \|= PCRE_ANCHORED;
else	else
{	{
if (firstbyte < 0)	if (firstcharflags < 0)
firstbyte = find_firstassertedchar(codestart, FALSE);	firstchar = find_firstassertedchar(codestart, &firstcharflags, FALSE);
if (firstbyte >= 0) /* Remove caseless flag for non-caseable chars */	if (firstcharflags >= 0) /* Remove caseless flag for non-caseable chars */
{	{
int ch = firstbyte & 255;	#if defined COMPILE_PCRE8
re->first_byte = ((firstbyte & REQ_CASELESS) != 0 &&	re->first_char = firstchar & 0xff;
cd->fcc[ch] == ch)? ch : firstbyte;	#elif defined COMPILE_PCRE16
	re->first_char = firstchar & 0xffff;
	#elif defined COMPILE_PCRE32
	re->first_char = firstchar;
	#endif
	if ((firstcharflags & REQ_CASELESS) != 0)
	{
	#if defined SUPPORT_UCP && !(defined COMPILE_PCRE8)
	/* We ignore non-ASCII first chars in 8 bit mode. */
	if (utf)
	{
	if (re->first_char < 128)
	{
	if (cd->fcc[re->first_char] != re->first_char)
	re->flags \|= PCRE_FCH_CASELESS;
	}
	else if (UCD_OTHERCASE(re->first_char) != re->first_char)
	re->flags \|= PCRE_FCH_CASELESS;
	}
	else
	#endif
	if (MAX_255(re->first_char)
	&& cd->fcc[re->first_char] != re->first_char)
	re->flags \|= PCRE_FCH_CASELESS;
	}

re->flags \|= PCRE_FIRSTSET;	re->flags \|= PCRE_FIRSTSET;
}	}
else if (is_startline(codestart, 0, cd->backref_map))
re->flags \|= PCRE_STARTLINE;	else if (is_startline(codestart, 0, cd, 0)) re->flags \|= PCRE_STARTLINE;
}	}
}	}

Line 7743 if ((re->options & PCRE_ANCHORED) == 0)	Line 9325 if ((re->options & PCRE_ANCHORED) == 0)
variable length item in the regex. Remove the caseless flag for non-caseable	variable length item in the regex. Remove the caseless flag for non-caseable
bytes. */	bytes. */

if (reqbyte >= 0 &&	if (reqcharflags >= 0 &&
((re->options & PCRE_ANCHORED) == 0 \|\| (reqbyte & REQ_VARY) != 0))	((re->options & PCRE_ANCHORED) == 0 \|\| (reqcharflags & REQ_VARY) != 0))
{	{
int ch = reqbyte & 255;	#if defined COMPILE_PCRE8
re->req_byte = ((reqbyte & REQ_CASELESS) != 0 &&	re->req_char = reqchar & 0xff;
cd->fcc[ch] == ch)? (reqbyte & ~REQ_CASELESS) : reqbyte;	#elif defined COMPILE_PCRE16
	re->req_char = reqchar & 0xffff;
	#elif defined COMPILE_PCRE32
	re->req_char = reqchar;
	#endif
	if ((reqcharflags & REQ_CASELESS) != 0)
	{
	#if defined SUPPORT_UCP && !(defined COMPILE_PCRE8)
	/* We ignore non-ASCII first chars in 8 bit mode. */
	if (utf)
	{
	if (re->req_char < 128)
	{
	if (cd->fcc[re->req_char] != re->req_char)
	re->flags \|= PCRE_RCH_CASELESS;
	}
	else if (UCD_OTHERCASE(re->req_char) != re->req_char)
	re->flags \|= PCRE_RCH_CASELESS;
	}
	else
	#endif
	if (MAX_255(re->req_char) && cd->fcc[re->req_char] != re->req_char)
	re->flags \|= PCRE_RCH_CASELESS;
	}

re->flags \|= PCRE_REQCHSET;	re->flags \|= PCRE_REQCHSET;
}	}

Line 7763 printf("Options=%08x\n", re->options);	Line 9369 printf("Options=%08x\n", re->options);

if ((re->flags & PCRE_FIRSTSET) != 0)	if ((re->flags & PCRE_FIRSTSET) != 0)
{	{
int ch = re->first_byte & 255;	pcre_uchar ch = re->first_char;
const char *caseless = ((re->first_byte & REQ_CASELESS) == 0)?	const char *caseless =
"" : " (caseless)";	((re->flags & PCRE_FCH_CASELESS) == 0)? "" : " (caseless)";
if (isprint(ch)) printf("First char = %c%s\n", ch, caseless);	if (PRINTABLE(ch)) printf("First char = %c%s\n", ch, caseless);
else printf("First char = \\x%02x%s\n", ch, caseless);	else printf("First char = \\x%02x%s\n", ch, caseless);
}	}

if ((re->flags & PCRE_REQCHSET) != 0)	if ((re->flags & PCRE_REQCHSET) != 0)
{	{
int ch = re->req_byte & 255;	pcre_uchar ch = re->req_char;
const char *caseless = ((re->req_byte & REQ_CASELESS) == 0)?	const char *caseless =
"" : " (caseless)";	((re->flags & PCRE_RCH_CASELESS) == 0)? "" : " (caseless)";
if (isprint(ch)) printf("Req char = %c%s\n", ch, caseless);	if (PRINTABLE(ch)) printf("Req char = %c%s\n", ch, caseless);
else printf("Req char = \\x%02x%s\n", ch, caseless);	else printf("Req char = \\x%02x%s\n", ch, caseless);
}	}

pcre_printint(re, stdout, TRUE);	#if defined COMPILE_PCRE8
	pcre_printint((pcre *)re, stdout, TRUE);
	#elif defined COMPILE_PCRE16
	pcre16_printint((pcre *)re, stdout, TRUE);
	#elif defined COMPILE_PCRE32
	pcre32_printint((pcre *)re, stdout, TRUE);
	#endif

/* This check is done here in the debugging case so that the code that	/* This check is done here in the debugging case so that the code that
was compiled can be seen. */	was compiled can be seen. */

if (code - codestart > length)	if (code - codestart > length)
{	{
(pcre_free)(re);	(PUBL(free))(re);
*errorptr = find_error_text(ERR23);	*errorptr = find_error_text(ERR23);
erroroffset = ptr - (uschar )pattern;	erroroffset = ptr - (pcre_uchar )pattern;
if (errorcodeptr != NULL) *errorcodeptr = ERR23;	if (errorcodeptr != NULL) *errorcodeptr = ERR23;
return NULL;	return NULL;
}	}
#endif /* PCRE_DEBUG */	#endif /* PCRE_DEBUG */

	/* Check for a pattern than can match an empty string, so that this information
	can be provided to applications. */

	do
	{
	if (could_be_empty_branch(codestart, code, utf, cd, NULL))
	{
	re->flags \|= PCRE_MATCH_EMPTY;
	break;
	}
	codestart += GET(codestart, 1);
	}
	while (*codestart == OP_ALT);

	#if defined COMPILE_PCRE8
return (pcre *)re;	return (pcre *)re;
	#elif defined COMPILE_PCRE16
	return (pcre16 *)re;
	#elif defined COMPILE_PCRE32
	return (pcre32 *)re;
	#endif
}	}

/* End of pcre_compile.c */	/* End of pcre_compile.c */

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>

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changed lines
	Added in v.1.1.1.5