1: /* Extended regular expression matching and search library.
2: Copyright (C) 2002, 2003 Free Software Foundation, Inc.
3: This file is part of the GNU C Library.
4: Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
5:
6: The GNU C Library is free software; you can redistribute it and/or
7: modify it under the terms of the GNU Lesser General Public
8: License as published by the Free Software Foundation; either
9: version 2.1 of the License, or (at your option) any later version.
10:
11: The GNU C Library is distributed in the hope that it will be useful,
12: but WITHOUT ANY WARRANTY; without even the implied warranty of
13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: Lesser General Public License for more details.
15:
16: You should have received a copy of the GNU Lesser General Public
17: License along with the GNU C Library; if not, write to the Free
18: Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
19: MA 02110-1301 USA. */
20:
21: #ifndef _REGEX_INTERNAL_H
22: #define _REGEX_INTERNAL_H 1
23:
24: #ifdef HAVE_CONFIG_H
25: #include "config.h"
26: #endif
27:
28: #include <assert.h>
29: #include <ctype.h>
30: #include <limits.h>
31: #include <stdio.h>
32: #include <stdlib.h>
33: #include <string.h>
34:
35: #if defined HAVE_LOCALE_H || defined _LIBC
36: # include <locale.h>
37: #endif
38: #if defined HAVE_WCHAR_H || defined _LIBC
39: # include <wchar.h>
40: #endif /* HAVE_WCHAR_H || _LIBC */
41: #if defined HAVE_WCTYPE_H || defined _LIBC
42: # include <wctype.h>
43: #endif /* HAVE_WCTYPE_H || _LIBC */
44:
45: /* In case that the system doesn't have isblank(). */
46: #if !defined _LIBC && !defined HAVE_ISBLANK && !defined isblank
47: # define isblank(ch) ((ch) == ' ' || (ch) == '\t')
48: #endif
49:
50: #ifdef _LIBC
51: # ifndef _RE_DEFINE_LOCALE_FUNCTIONS
52: # define _RE_DEFINE_LOCALE_FUNCTIONS 1
53: # include <locale/localeinfo.h>
54: # include <locale/elem-hash.h>
55: # include <locale/coll-lookup.h>
56: # endif
57: #endif
58:
59: /* This is for other GNU distributions with internationalized messages. */
60: #if HAVE_LIBINTL_H || defined _LIBC
61: # include <libintl.h>
62: # ifdef _LIBC
63: # undef gettext
64: # define gettext(msgid) \
65: INTUSE(__dcgettext) (INTUSE(_libc_intl_domainname), msgid, LC_MESSAGES)
66: # endif
67: #else
68: # define gettext(msgid) (msgid)
69: #endif
70:
71: #ifndef gettext_noop
72: /* This define is so xgettext can find the internationalizable
73: strings. */
74: # define gettext_noop(String) String
75: #endif
76:
77: #if (defined MB_CUR_MAX && HAVE_LOCALE_H && HAVE_WCTYPE_H && HAVE_WCHAR_H && HAVE_WCRTOMB && HAVE_MBRTOWC && HAVE_WCSCOLL) || _LIBC
78: # define RE_ENABLE_I18N
79: #endif
80:
81: #if __GNUC__ >= 3
82: # define BE(expr, val) __builtin_expect (expr, val)
83: #else
84: # define BE(expr, val) (expr)
85: # define inline
86: #endif
87:
88: /* Number of bits in a byte. */
89: #define BYTE_BITS 8
90: /* Number of single byte character. */
91: #define SBC_MAX 256
92:
93: #define COLL_ELEM_LEN_MAX 8
94:
95: /* The character which represents newline. */
96: #define NEWLINE_CHAR '\n'
97: #define WIDE_NEWLINE_CHAR L'\n'
98:
99: /* Rename to standard API for using out of glibc. */
100: #ifndef _LIBC
101: # define __wctype wctype
102: # define __iswctype iswctype
103: # define __btowc btowc
104: # define __mempcpy mempcpy
105: # define __wcrtomb wcrtomb
106: # define attribute_hidden
107: #endif /* not _LIBC */
108:
109: extern const char __re_error_msgid[] attribute_hidden;
110: extern const size_t __re_error_msgid_idx[] attribute_hidden;
111:
112: /* Number of bits in an unsinged int. */
113: #define UINT_BITS (sizeof (unsigned int) * BYTE_BITS)
114: /* Number of unsigned int in an bit_set. */
115: #define BITSET_UINTS ((SBC_MAX + UINT_BITS - 1) / UINT_BITS)
116: typedef unsigned int bitset[BITSET_UINTS];
117: typedef unsigned int *re_bitset_ptr_t;
118:
119: #define bitset_set(set,i) (set[i / UINT_BITS] |= 1 << i % UINT_BITS)
120: #define bitset_clear(set,i) (set[i / UINT_BITS] &= ~(1 << i % UINT_BITS))
121: #define bitset_contain(set,i) (set[i / UINT_BITS] & (1 << i % UINT_BITS))
122: #define bitset_empty(set) memset (set, 0, sizeof (unsigned int) * BITSET_UINTS)
123: #define bitset_set_all(set) \
124: memset (set, 255, sizeof (unsigned int) * BITSET_UINTS)
125: #define bitset_copy(dest,src) \
126: memcpy (dest, src, sizeof (unsigned int) * BITSET_UINTS)
127: static inline void bitset_not (bitset set);
128: static inline void bitset_merge (bitset dest, const bitset src);
129: static inline void bitset_not_merge (bitset dest, const bitset src);
130:
131: #define PREV_WORD_CONSTRAINT 0x0001
132: #define PREV_NOTWORD_CONSTRAINT 0x0002
133: #define NEXT_WORD_CONSTRAINT 0x0004
134: #define NEXT_NOTWORD_CONSTRAINT 0x0008
135: #define PREV_NEWLINE_CONSTRAINT 0x0010
136: #define NEXT_NEWLINE_CONSTRAINT 0x0020
137: #define PREV_BEGBUF_CONSTRAINT 0x0040
138: #define NEXT_ENDBUF_CONSTRAINT 0x0080
139: #define DUMMY_CONSTRAINT 0x0100
140:
141: typedef enum
142: {
143: INSIDE_WORD = PREV_WORD_CONSTRAINT | NEXT_WORD_CONSTRAINT,
144: WORD_FIRST = PREV_NOTWORD_CONSTRAINT | NEXT_WORD_CONSTRAINT,
145: WORD_LAST = PREV_WORD_CONSTRAINT | NEXT_NOTWORD_CONSTRAINT,
146: LINE_FIRST = PREV_NEWLINE_CONSTRAINT,
147: LINE_LAST = NEXT_NEWLINE_CONSTRAINT,
148: BUF_FIRST = PREV_BEGBUF_CONSTRAINT,
149: BUF_LAST = NEXT_ENDBUF_CONSTRAINT,
150: WORD_DELIM = DUMMY_CONSTRAINT
151: } re_context_type;
152:
153: typedef struct
154: {
155: int alloc;
156: int nelem;
157: int *elems;
158: } re_node_set;
159:
160: typedef enum
161: {
162: NON_TYPE = 0,
163:
164: /* Token type, these are used only by token. */
165: OP_OPEN_BRACKET,
166: OP_CLOSE_BRACKET,
167: OP_CHARSET_RANGE,
168: OP_OPEN_DUP_NUM,
169: OP_CLOSE_DUP_NUM,
170: OP_NON_MATCH_LIST,
171: OP_OPEN_COLL_ELEM,
172: OP_CLOSE_COLL_ELEM,
173: OP_OPEN_EQUIV_CLASS,
174: OP_CLOSE_EQUIV_CLASS,
175: OP_OPEN_CHAR_CLASS,
176: OP_CLOSE_CHAR_CLASS,
177: OP_WORD,
178: OP_NOTWORD,
179: BACK_SLASH,
180:
181: /* Tree type, these are used only by tree. */
182: CONCAT,
183: ALT,
184: SUBEXP,
185: SIMPLE_BRACKET,
186: #ifdef RE_ENABLE_I18N
187: COMPLEX_BRACKET,
188: #endif /* RE_ENABLE_I18N */
189:
190: /* Node type, These are used by token, node, tree. */
191: OP_OPEN_SUBEXP,
192: OP_CLOSE_SUBEXP,
193: OP_PERIOD,
194: CHARACTER,
195: END_OF_RE,
196: OP_ALT,
197: OP_DUP_ASTERISK,
198: OP_DUP_PLUS,
199: OP_DUP_QUESTION,
200: OP_BACK_REF,
201: ANCHOR,
202:
203: /* Dummy marker. */
204: END_OF_RE_TOKEN_T
205: } re_token_type_t;
206:
207: #ifdef RE_ENABLE_I18N
208: typedef struct
209: {
210: /* Multibyte characters. */
211: wchar_t *mbchars;
212:
213: /* Collating symbols. */
214: # ifdef _LIBC
215: int32_t *coll_syms;
216: # endif
217:
218: /* Equivalence classes. */
219: # ifdef _LIBC
220: int32_t *equiv_classes;
221: # endif
222:
223: /* Range expressions. */
224: # ifdef _LIBC
225: uint32_t *range_starts;
226: uint32_t *range_ends;
227: # else /* not _LIBC */
228: wchar_t *range_starts;
229: wchar_t *range_ends;
230: # endif /* not _LIBC */
231:
232: /* Character classes. */
233: wctype_t *char_classes;
234:
235: /* If this character set is the non-matching list. */
236: unsigned int non_match : 1;
237:
238: /* # of multibyte characters. */
239: int nmbchars;
240:
241: /* # of collating symbols. */
242: int ncoll_syms;
243:
244: /* # of equivalence classes. */
245: int nequiv_classes;
246:
247: /* # of range expressions. */
248: int nranges;
249:
250: /* # of character classes. */
251: int nchar_classes;
252: } re_charset_t;
253: #endif /* RE_ENABLE_I18N */
254:
255: typedef struct
256: {
257: union
258: {
259: unsigned char c; /* for CHARACTER */
260: re_bitset_ptr_t sbcset; /* for SIMPLE_BRACKET */
261: #ifdef RE_ENABLE_I18N
262: re_charset_t *mbcset; /* for COMPLEX_BRACKET */
263: #endif /* RE_ENABLE_I18N */
264: int idx; /* for BACK_REF */
265: re_context_type ctx_type; /* for ANCHOR */
266: } opr;
267: #if __GNUC__ >= 2
268: re_token_type_t type : 8;
269: #else
270: re_token_type_t type;
271: #endif
272: unsigned int constraint : 10; /* context constraint */
273: unsigned int duplicated : 1;
274: #ifdef RE_ENABLE_I18N
275: unsigned int mb_partial : 1;
276: #endif
277: } re_token_t;
278:
279: #define IS_EPSILON_NODE(type) \
280: ((type) == OP_ALT || (type) == OP_DUP_ASTERISK || (type) == OP_DUP_PLUS \
281: || (type) == OP_DUP_QUESTION || (type) == ANCHOR \
282: || (type) == OP_OPEN_SUBEXP || (type) == OP_CLOSE_SUBEXP)
283:
284: #define ACCEPT_MB_NODE(type) \
285: ((type) == COMPLEX_BRACKET || (type) == OP_PERIOD)
286:
287: struct re_string_t
288: {
289: /* Indicate the raw buffer which is the original string passed as an
290: argument of regexec(), re_search(), etc.. */
291: const unsigned char *raw_mbs;
292: /* Store the multibyte string. In case of "case insensitive mode" like
293: REG_ICASE, upper cases of the string are stored, otherwise MBS points
294: the same address that RAW_MBS points. */
295: unsigned char *mbs;
296: /* Store the case sensitive multibyte string. In case of
297: "case insensitive mode", the original string are stored,
298: otherwise MBS_CASE points the same address that MBS points. */
299: unsigned char *mbs_case;
300: #ifdef RE_ENABLE_I18N
301: /* Store the wide character string which is corresponding to MBS. */
302: wint_t *wcs;
303: mbstate_t cur_state;
304: #endif
305: /* Index in RAW_MBS. Each character mbs[i] corresponds to
306: raw_mbs[raw_mbs_idx + i]. */
307: int raw_mbs_idx;
308: /* The length of the valid characters in the buffers. */
309: int valid_len;
310: /* The length of the buffers MBS, MBS_CASE, and WCS. */
311: int bufs_len;
312: /* The index in MBS, which is updated by re_string_fetch_byte. */
313: int cur_idx;
314: /* This is length_of_RAW_MBS - RAW_MBS_IDX. */
315: int len;
316: /* End of the buffer may be shorter than its length in the cases such
317: as re_match_2, re_search_2. Then, we use STOP for end of the buffer
318: instead of LEN. */
319: int stop;
320:
321: /* The context of mbs[0]. We store the context independently, since
322: the context of mbs[0] may be different from raw_mbs[0], which is
323: the beginning of the input string. */
324: unsigned int tip_context;
325: /* The translation passed as a part of an argument of re_compile_pattern. */
326: RE_TRANSLATE_TYPE trans;
327: /* 1 if REG_ICASE. */
328: unsigned int icase : 1;
329: };
330: typedef struct re_string_t re_string_t;
331: /* In case of REG_ICASE, we allocate the buffer dynamically for mbs. */
332: #define MBS_ALLOCATED(pstr) (pstr->icase)
333: /* In case that we need translation, we allocate the buffer dynamically
334: for mbs_case. Note that mbs == mbs_case if not REG_ICASE. */
335: #define MBS_CASE_ALLOCATED(pstr) (pstr->trans != NULL)
336:
337:
338: static reg_errcode_t re_string_allocate (re_string_t *pstr, const char *str,
339: int len, int init_len,
340: RE_TRANSLATE_TYPE trans, int icase);
341: static reg_errcode_t re_string_construct (re_string_t *pstr, const char *str,
342: int len, RE_TRANSLATE_TYPE trans,
343: int icase);
344: static reg_errcode_t re_string_reconstruct (re_string_t *pstr, int idx,
345: int eflags, int newline);
346: static reg_errcode_t re_string_realloc_buffers (re_string_t *pstr,
347: int new_buf_len);
348: #ifdef RE_ENABLE_I18N
349: static void build_wcs_buffer (re_string_t *pstr);
350: static void build_wcs_upper_buffer (re_string_t *pstr);
351: #endif /* RE_ENABLE_I18N */
352: static void build_upper_buffer (re_string_t *pstr);
353: static void re_string_translate_buffer (re_string_t *pstr);
354: static void re_string_destruct (re_string_t *pstr);
355: #ifdef RE_ENABLE_I18N
356: static int re_string_elem_size_at (const re_string_t *pstr, int idx);
357: static inline int re_string_char_size_at (const re_string_t *pstr, int idx);
358: static inline wint_t re_string_wchar_at (const re_string_t *pstr, int idx);
359: #endif /* RE_ENABLE_I18N */
360: static unsigned int re_string_context_at (const re_string_t *input, int idx,
361: int eflags, int newline_anchor);
362: #define re_string_peek_byte(pstr, offset) \
363: ((pstr)->mbs[(pstr)->cur_idx + offset])
364: #define re_string_peek_byte_case(pstr, offset) \
365: ((pstr)->mbs_case[(pstr)->cur_idx + offset])
366: #define re_string_fetch_byte(pstr) \
367: ((pstr)->mbs[(pstr)->cur_idx++])
368: #define re_string_fetch_byte_case(pstr) \
369: ((pstr)->mbs_case[(pstr)->cur_idx++])
370: #define re_string_first_byte(pstr, idx) \
371: ((idx) == (pstr)->len || (pstr)->wcs[idx] != WEOF)
372: #define re_string_is_single_byte_char(pstr, idx) \
373: ((pstr)->wcs[idx] != WEOF && ((pstr)->len == (idx) \
374: || (pstr)->wcs[(idx) + 1] != WEOF))
375: #define re_string_eoi(pstr) ((pstr)->stop <= (pstr)->cur_idx)
376: #define re_string_cur_idx(pstr) ((pstr)->cur_idx)
377: #define re_string_get_buffer(pstr) ((pstr)->mbs)
378: #define re_string_length(pstr) ((pstr)->len)
379: #define re_string_byte_at(pstr,idx) ((pstr)->mbs[idx])
380: #define re_string_skip_bytes(pstr,idx) ((pstr)->cur_idx += (idx))
381: #define re_string_set_index(pstr,idx) ((pstr)->cur_idx = (idx))
382:
383: #define re_malloc(t,n) ((t *) malloc ((n) * sizeof (t)))
384: #define re_realloc(p,t,n) ((t *) realloc (p, (n) * sizeof (t)))
385: #define re_free(p) free (p)
386:
387: struct bin_tree_t
388: {
389: struct bin_tree_t *parent;
390: struct bin_tree_t *left;
391: struct bin_tree_t *right;
392:
393: /* `node_idx' is the index in dfa->nodes, if `type' == 0.
394: Otherwise `type' indicate the type of this node. */
395: re_token_type_t type;
396: int node_idx;
397:
398: int first;
399: int next;
400: re_node_set eclosure;
401: };
402: typedef struct bin_tree_t bin_tree_t;
403:
404:
405: #define CONTEXT_WORD 1
406: #define CONTEXT_NEWLINE (CONTEXT_WORD << 1)
407: #define CONTEXT_BEGBUF (CONTEXT_NEWLINE << 1)
408: #define CONTEXT_ENDBUF (CONTEXT_BEGBUF << 1)
409:
410: #define IS_WORD_CONTEXT(c) ((c) & CONTEXT_WORD)
411: #define IS_NEWLINE_CONTEXT(c) ((c) & CONTEXT_NEWLINE)
412: #define IS_BEGBUF_CONTEXT(c) ((c) & CONTEXT_BEGBUF)
413: #define IS_ENDBUF_CONTEXT(c) ((c) & CONTEXT_ENDBUF)
414: #define IS_ORDINARY_CONTEXT(c) ((c) == 0)
415:
416: #define IS_WORD_CHAR(ch) (isalnum (ch) || (ch) == '_')
417: #define IS_NEWLINE(ch) ((ch) == NEWLINE_CHAR)
418: #define IS_WIDE_WORD_CHAR(ch) (iswalnum (ch) || (ch) == L'_')
419: #define IS_WIDE_NEWLINE(ch) ((ch) == WIDE_NEWLINE_CHAR)
420:
421: #define NOT_SATISFY_PREV_CONSTRAINT(constraint,context) \
422: ((((constraint) & PREV_WORD_CONSTRAINT) && !IS_WORD_CONTEXT (context)) \
423: || ((constraint & PREV_NOTWORD_CONSTRAINT) && IS_WORD_CONTEXT (context)) \
424: || ((constraint & PREV_NEWLINE_CONSTRAINT) && !IS_NEWLINE_CONTEXT (context))\
425: || ((constraint & PREV_BEGBUF_CONSTRAINT) && !IS_BEGBUF_CONTEXT (context)))
426:
427: #define NOT_SATISFY_NEXT_CONSTRAINT(constraint,context) \
428: ((((constraint) & NEXT_WORD_CONSTRAINT) && !IS_WORD_CONTEXT (context)) \
429: || (((constraint) & NEXT_NOTWORD_CONSTRAINT) && IS_WORD_CONTEXT (context)) \
430: || (((constraint) & NEXT_NEWLINE_CONSTRAINT) && !IS_NEWLINE_CONTEXT (context)) \
431: || (((constraint) & NEXT_ENDBUF_CONSTRAINT) && !IS_ENDBUF_CONTEXT (context)))
432:
433: struct re_dfastate_t
434: {
435: unsigned int hash;
436: re_node_set nodes;
437: re_node_set *entrance_nodes;
438: struct re_dfastate_t **trtable;
439: struct re_dfastate_t **trtable_search;
440: /* If this state is a special state.
441: A state is a special state if the state is the halt state, or
442: a anchor. */
443: unsigned int context : 2;
444: unsigned int halt : 1;
445: /* If this state can accept `multi byte'.
446: Note that we refer to multibyte characters, and multi character
447: collating elements as `multi byte'. */
448: unsigned int accept_mb : 1;
449: /* If this state has backreference node(s). */
450: unsigned int has_backref : 1;
451: unsigned int has_constraint : 1;
452: };
453: typedef struct re_dfastate_t re_dfastate_t;
454:
455: typedef struct
456: {
457: /* start <= node < end */
458: int start;
459: int end;
460: } re_subexp_t;
461:
462: struct re_state_table_entry
463: {
464: int num;
465: int alloc;
466: re_dfastate_t **array;
467: };
468:
469: /* Array type used in re_sub_match_last_t and re_sub_match_top_t. */
470:
471: typedef struct
472: {
473: int next_idx;
474: int alloc;
475: re_dfastate_t **array;
476: } state_array_t;
477:
478: /* Store information about the node NODE whose type is OP_CLOSE_SUBEXP. */
479:
480: typedef struct
481: {
482: int node;
483: int str_idx; /* The position NODE match at. */
484: state_array_t path;
485: } re_sub_match_last_t;
486:
487: /* Store information about the node NODE whose type is OP_OPEN_SUBEXP.
488: And information about the node, whose type is OP_CLOSE_SUBEXP,
489: corresponding to NODE is stored in LASTS. */
490:
491: typedef struct
492: {
493: int str_idx;
494: int node;
495: int next_last_offset;
496: state_array_t *path;
497: int alasts; /* Allocation size of LASTS. */
498: int nlasts; /* The number of LASTS. */
499: re_sub_match_last_t **lasts;
500: } re_sub_match_top_t;
501:
502: struct re_backref_cache_entry
503: {
504: int node;
505: int str_idx;
506: int subexp_from;
507: int subexp_to;
508: int flag;
509: };
510:
511: typedef struct
512: {
513: /* EFLAGS of the argument of regexec. */
514: int eflags;
515: /* Where the matching ends. */
516: int match_last;
517: int last_node;
518: /* The string object corresponding to the input string. */
519: re_string_t *input;
520: /* The state log used by the matcher. */
521: re_dfastate_t **state_log;
522: int state_log_top;
523: /* Back reference cache. */
524: int nbkref_ents;
525: int abkref_ents;
526: struct re_backref_cache_entry *bkref_ents;
527: int max_mb_elem_len;
528: int nsub_tops;
529: int asub_tops;
530: re_sub_match_top_t **sub_tops;
531: } re_match_context_t;
532:
533: typedef struct
534: {
535: int cur_bkref;
536: int cls_subexp_idx;
537:
538: re_dfastate_t **sifted_states;
539: re_dfastate_t **limited_states;
540:
541: re_node_set limits;
542:
543: int last_node;
544: int last_str_idx;
545: int check_subexp;
546: } re_sift_context_t;
547:
548: struct re_fail_stack_ent_t
549: {
550: int idx;
551: int node;
552: regmatch_t *regs;
553: re_node_set eps_via_nodes;
554: };
555:
556: struct re_fail_stack_t
557: {
558: int num;
559: int alloc;
560: struct re_fail_stack_ent_t *stack;
561: };
562:
563: struct re_dfa_t
564: {
565: re_bitset_ptr_t word_char;
566:
567: /* number of subexpressions `re_nsub' is in regex_t. */
568: int subexps_alloc;
569: re_subexp_t *subexps;
570:
571: re_token_t *nodes;
572: int nodes_alloc;
573: int nodes_len;
574: bin_tree_t *str_tree;
575: int *nexts;
576: int *org_indices;
577: re_node_set *edests;
578: re_node_set *eclosures;
579: re_node_set *inveclosures;
580: struct re_state_table_entry *state_table;
581: unsigned int state_hash_mask;
582: re_dfastate_t *init_state;
583: re_dfastate_t *init_state_word;
584: re_dfastate_t *init_state_nl;
585: re_dfastate_t *init_state_begbuf;
586: int states_alloc;
587: int init_node;
588: int nbackref; /* The number of backreference in this dfa. */
589: /* Bitmap expressing which backreference is used. */
590: unsigned int used_bkref_map;
591: #ifdef DEBUG
592: char* re_str;
593: #endif
594: unsigned int has_plural_match : 1;
595: /* If this dfa has "multibyte node", which is a backreference or
596: a node which can accept multibyte character or multi character
597: collating element. */
598: unsigned int has_mb_node : 1;
599: };
600: typedef struct re_dfa_t re_dfa_t;
601:
602: static reg_errcode_t re_node_set_alloc (re_node_set *set, int size);
603: static reg_errcode_t re_node_set_init_1 (re_node_set *set, int elem);
604: static reg_errcode_t re_node_set_init_2 (re_node_set *set, int elem1,
605: int elem2);
606: #define re_node_set_init_empty(set) memset (set, '\0', sizeof (re_node_set))
607: static reg_errcode_t re_node_set_init_copy (re_node_set *dest,
608: const re_node_set *src);
609: static reg_errcode_t re_node_set_add_intersect (re_node_set *dest,
610: const re_node_set *src1,
611: const re_node_set *src2);
612: static reg_errcode_t re_node_set_init_union (re_node_set *dest,
613: const re_node_set *src1,
614: const re_node_set *src2);
615: static reg_errcode_t re_node_set_merge (re_node_set *dest,
616: const re_node_set *src);
617: static int re_node_set_insert (re_node_set *set, int elem);
618: static int re_node_set_compare (const re_node_set *set1,
619: const re_node_set *set2);
620: static int re_node_set_contains (const re_node_set *set, int elem);
621: static void re_node_set_remove_at (re_node_set *set, int idx);
622: #define re_node_set_remove(set,id) \
623: (re_node_set_remove_at (set, re_node_set_contains (set, id) - 1))
624: #define re_node_set_empty(p) ((p)->nelem = 0)
625: #define re_node_set_free(set) re_free ((set)->elems)
626: static int re_dfa_add_node (re_dfa_t *dfa, re_token_t token, int mode);
627: static re_dfastate_t *re_acquire_state (reg_errcode_t *err, re_dfa_t *dfa,
628: const re_node_set *nodes);
629: static re_dfastate_t *re_acquire_state_context (reg_errcode_t *err,
630: re_dfa_t *dfa,
631: const re_node_set *nodes,
632: unsigned int context);
633: static void free_state (re_dfastate_t *state);
634:
635:
636: typedef enum
637: {
638: SB_CHAR,
639: MB_CHAR,
640: EQUIV_CLASS,
641: COLL_SYM,
642: CHAR_CLASS
643: } bracket_elem_type;
644:
645: typedef struct
646: {
647: bracket_elem_type type;
648: union
649: {
650: unsigned char ch;
651: unsigned char *name;
652: wchar_t wch;
653: } opr;
654: } bracket_elem_t;
655:
656:
657: /* Inline functions for bitset operation. */
658: static inline void
659: bitset_not (set)
660: bitset set;
661: {
662: int bitset_i;
663: for (bitset_i = 0; bitset_i < BITSET_UINTS; ++bitset_i)
664: set[bitset_i] = ~set[bitset_i];
665: }
666:
667: static inline void
668: bitset_merge (dest, src)
669: bitset dest;
670: const bitset src;
671: {
672: int bitset_i;
673: for (bitset_i = 0; bitset_i < BITSET_UINTS; ++bitset_i)
674: dest[bitset_i] |= src[bitset_i];
675: }
676:
677: static inline void
678: bitset_not_merge (dest, src)
679: bitset dest;
680: const bitset src;
681: {
682: int i;
683: for (i = 0; i < BITSET_UINTS; ++i)
684: dest[i] |= ~src[i];
685: }
686:
687: #ifdef RE_ENABLE_I18N
688: /* Inline functions for re_string. */
689: static inline int
690: re_string_char_size_at (pstr, idx)
691: const re_string_t *pstr;
692: int idx;
693: {
694: int byte_idx;
695: if (MB_CUR_MAX == 1)
696: return 1;
697: for (byte_idx = 1; idx + byte_idx < pstr->len; ++byte_idx)
698: if (pstr->wcs[idx + byte_idx] != WEOF)
699: break;
700: return byte_idx;
701: }
702:
703: static inline wint_t
704: re_string_wchar_at (pstr, idx)
705: const re_string_t *pstr;
706: int idx;
707: {
708: if (MB_CUR_MAX == 1)
709: return (wint_t) pstr->mbs[idx];
710: return (wint_t) pstr->wcs[idx];
711: }
712:
713: static int
714: re_string_elem_size_at (pstr, idx)
715: const re_string_t *pstr;
716: int idx;
717: {
718: #ifdef _LIBC
719: const unsigned char *p, *extra;
720: const int32_t *table, *indirect;
721: int32_t tmp;
722: # include <locale/weight.h>
723: uint_fast32_t nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
724:
725: if (nrules != 0)
726: {
727: table = (const int32_t *) _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB);
728: extra = (const unsigned char *)
729: _NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAMB);
730: indirect = (const int32_t *) _NL_CURRENT (LC_COLLATE,
731: _NL_COLLATE_INDIRECTMB);
732: p = pstr->mbs + idx;
733: tmp = findidx (&p);
734: return p - pstr->mbs - idx;
735: }
736: else
737: #endif /* _LIBC */
738: return 1;
739: }
740: #endif /* RE_ENABLE_I18N */
741:
742: #endif /* _REGEX_INTERNAL_H */
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