1 /*************************************************
2 * Perl-Compatible Regular Expressions *
3 *************************************************/
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.
8 Written by Philip Hazel
9 Copyright (c) 1997-2009 University of Cambridge
11 -----------------------------------------------------------------------------
12 Redistribution and use in source and binary forms, with or without
13 modification, are permitted provided that the following conditions are met:
15 * Redistributions of source code must retain the above copyright notice,
16 this list of conditions and the following disclaimer.
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.
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.
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 -----------------------------------------------------------------------------
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/. */
54 #include "pcre_internal.h"
58 /*************************************************
59 * Check for newline at given position *
60 *************************************************/
62 /* It is guaranteed that the initial value of ptr is less than the end of the
63 string that is being processed.
66 ptr pointer to possible newline
68 endptr pointer to the end of the string
69 lenptr where to return the length
70 utf8 TRUE if in utf8 mode
72 Returns: TRUE or FALSE
76 _pcre_is_newline(USPTR ptr, int type, USPTR endptr, int *lenptr, BOOL utf8)
79 if (utf8) { GETCHAR(c, ptr); } else c = *ptr;
81 if (type == NLTYPE_ANYCRLF) switch(c)
83 case 0x000a: *lenptr = 1; return TRUE; /* LF */
84 case 0x000d: *lenptr = (ptr < endptr - 1 && ptr[1] == 0x0a)? 2 : 1;
86 default: return FALSE;
95 case 0x000c: *lenptr = 1; return TRUE; /* FF */
96 case 0x000d: *lenptr = (ptr < endptr - 1 && ptr[1] == 0x0a)? 2 : 1;
98 case 0x0085: *lenptr = utf8? 2 : 1; return TRUE; /* NEL */
100 case 0x2029: *lenptr = 3; return TRUE; /* PS */
101 default: return FALSE;
107 /*************************************************
108 * Check for newline at previous position *
109 *************************************************/
111 /* It is guaranteed that the initial value of ptr is greater than the start of
112 the string that is being processed.
115 ptr pointer to possible newline
116 type the newline type
117 startptr pointer to the start of the string
118 lenptr where to return the length
119 utf8 TRUE if in utf8 mode
121 Returns: TRUE or FALSE
125 _pcre_was_newline(USPTR ptr, int type, USPTR startptr, int *lenptr, BOOL utf8)
136 #else /* no UTF-8 support */
138 #endif /* SUPPORT_UTF8 */
140 if (type == NLTYPE_ANYCRLF) switch(c)
142 case 0x000a: *lenptr = (ptr > startptr && ptr[-1] == 0x0d)? 2 : 1;
143 return TRUE; /* LF */
144 case 0x000d: *lenptr = 1; return TRUE; /* CR */
145 default: return FALSE;
150 case 0x000a: *lenptr = (ptr > startptr && ptr[-1] == 0x0d)? 2 : 1;
151 return TRUE; /* LF */
152 case 0x000b: /* VT */
153 case 0x000c: /* FF */
154 case 0x000d: *lenptr = 1; return TRUE; /* CR */
155 case 0x0085: *lenptr = utf8? 2 : 1; return TRUE; /* NEL */
156 case 0x2028: /* LS */
157 case 0x2029: *lenptr = 3; return TRUE; /* PS */
158 default: return FALSE;
162 /* End of pcre_newline.c */
