Annotation of embedaddon/php/ext/pcre/pcrelib/pcre_newline.c, revision 1.1.1.1
1.1 misho 1: /*************************************************
2: * Perl-Compatible Regular Expressions *
3: *************************************************/
4:
5: /* PCRE is a library of functions to support regular expressions whose syntax
6: and semantics are as close as possible to those of the Perl 5 language.
7:
8: Written by Philip Hazel
9: Copyright (c) 1997-2009 University of Cambridge
10:
11: -----------------------------------------------------------------------------
12: Redistribution and use in source and binary forms, with or without
13: modification, are permitted provided that the following conditions are met:
14:
15: * Redistributions of source code must retain the above copyright notice,
16: this list of conditions and the following disclaimer.
17:
18: * Redistributions in binary form must reproduce the above copyright
19: notice, this list of conditions and the following disclaimer in the
20: documentation and/or other materials provided with the distribution.
21:
22: * Neither the name of the University of Cambridge nor the names of its
23: contributors may be used to endorse or promote products derived from
24: this software without specific prior written permission.
25:
26: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
30: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36: POSSIBILITY OF SUCH DAMAGE.
37: -----------------------------------------------------------------------------
38: */
39:
40:
41: /* This module contains internal functions for testing newlines when more than
42: one kind of newline is to be recognized. When a newline is found, its length is
43: returned. In principle, we could implement several newline "types", each
44: referring to a different set of newline characters. At present, PCRE supports
45: only NLTYPE_FIXED, which gets handled without these functions, NLTYPE_ANYCRLF,
46: and NLTYPE_ANY. The full list of Unicode newline characters is taken from
47: http://unicode.org/unicode/reports/tr18/. */
48:
49:
50: #include "config.h"
51:
52: #include "pcre_internal.h"
53:
54:
55:
56: /*************************************************
57: * Check for newline at given position *
58: *************************************************/
59:
60: /* It is guaranteed that the initial value of ptr is less than the end of the
61: string that is being processed.
62:
63: Arguments:
64: ptr pointer to possible newline
65: type the newline type
66: endptr pointer to the end of the string
67: lenptr where to return the length
68: utf8 TRUE if in utf8 mode
69:
70: Returns: TRUE or FALSE
71: */
72:
73: BOOL
74: _pcre_is_newline(USPTR ptr, int type, USPTR endptr, int *lenptr, BOOL utf8)
75: {
76: int c;
77: if (utf8) { GETCHAR(c, ptr); } else c = *ptr;
78:
79: if (type == NLTYPE_ANYCRLF) switch(c)
80: {
81: case 0x000a: *lenptr = 1; return TRUE; /* LF */
82: case 0x000d: *lenptr = (ptr < endptr - 1 && ptr[1] == 0x0a)? 2 : 1;
83: return TRUE; /* CR */
84: default: return FALSE;
85: }
86:
87: /* NLTYPE_ANY */
88:
89: else switch(c)
90: {
91: case 0x000a: /* LF */
92: case 0x000b: /* VT */
93: case 0x000c: *lenptr = 1; return TRUE; /* FF */
94: case 0x000d: *lenptr = (ptr < endptr - 1 && ptr[1] == 0x0a)? 2 : 1;
95: return TRUE; /* CR */
96: case 0x0085: *lenptr = utf8? 2 : 1; return TRUE; /* NEL */
97: case 0x2028: /* LS */
98: case 0x2029: *lenptr = 3; return TRUE; /* PS */
99: default: return FALSE;
100: }
101: }
102:
103:
104:
105: /*************************************************
106: * Check for newline at previous position *
107: *************************************************/
108:
109: /* It is guaranteed that the initial value of ptr is greater than the start of
110: the string that is being processed.
111:
112: Arguments:
113: ptr pointer to possible newline
114: type the newline type
115: startptr pointer to the start of the string
116: lenptr where to return the length
117: utf8 TRUE if in utf8 mode
118:
119: Returns: TRUE or FALSE
120: */
121:
122: BOOL
123: _pcre_was_newline(USPTR ptr, int type, USPTR startptr, int *lenptr, BOOL utf8)
124: {
125: int c;
126: ptr--;
127: #ifdef SUPPORT_UTF8
128: if (utf8)
129: {
130: BACKCHAR(ptr);
131: GETCHAR(c, ptr);
132: }
133: else c = *ptr;
134: #else /* no UTF-8 support */
135: c = *ptr;
136: #endif /* SUPPORT_UTF8 */
137:
138: if (type == NLTYPE_ANYCRLF) switch(c)
139: {
140: case 0x000a: *lenptr = (ptr > startptr && ptr[-1] == 0x0d)? 2 : 1;
141: return TRUE; /* LF */
142: case 0x000d: *lenptr = 1; return TRUE; /* CR */
143: default: return FALSE;
144: }
145:
146: else switch(c)
147: {
148: case 0x000a: *lenptr = (ptr > startptr && ptr[-1] == 0x0d)? 2 : 1;
149: return TRUE; /* LF */
150: case 0x000b: /* VT */
151: case 0x000c: /* FF */
152: case 0x000d: *lenptr = 1; return TRUE; /* CR */
153: case 0x0085: *lenptr = utf8? 2 : 1; return TRUE; /* NEL */
154: case 0x2028: /* LS */
155: case 0x2029: *lenptr = 3; return TRUE; /* PS */
156: default: return FALSE;
157: }
158: }
159:
160: /* End of pcre_newline.c */
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