/[pcre]/code/branches/pcre16/pcre_string_utils.c
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Contents of /code/branches/pcre16/pcre_string_utils.c

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Revision 764 - (show annotations) (download)
Wed Nov 23 17:23:20 2011 UTC (2 years, 11 months ago) by zherczeg
File MIME type: text/plain
File size: 4623 byte(s)
PRIV macro added, several new files added
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) 1997-2010 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 an internal function that is used to match an extended
42 class. It is used by both pcre_exec() and pcre_def_exec(). */
43
44
45 #ifdef HAVE_CONFIG_H
46 #include "config.h"
47 #endif
48
49 #include "pcre_internal.h"
50
51 #ifndef COMPILE_PCRE8
52
53 /*************************************************
54 * Compare string utilities *
55 *************************************************/
56
57 /* The following two functions compares two strings. Basically an strcmp
58 for non 8 bit characters.
59
60 Arguments:
61 str1 first string
62 str2 second string
63
64 Returns: 0 if both string are equal (like strcmp), 1 otherwise
65 */
66
67 int
68 PRIV(strcmp_uc_uc)(const pcre_uchar *str1, const pcre_uchar *str2)
69 {
70 pcre_uchar c1;
71 pcre_uchar c2;
72
73 while (*str1 != '\0' || *str2 != '\0')
74 {
75 c1 = *str1++;
76 c2 = *str2++;
77 if (c1 != c2)
78 return ((c1 > c2) << 1) - 1;
79 }
80 /* Both length and characters must be equal. */
81 return 0;
82 }
83
84 int
85 PRIV(strcmp_uc_c8)(const pcre_uchar *str1, const char *str2)
86 {
87 const pcre_uint8 *ustr2 = (pcre_uint8 *)str2;
88 pcre_uchar c1;
89 pcre_uchar c2;
90
91 while (*str1 != '\0' || *ustr2 != '\0')
92 {
93 c1 = *str1++;
94 c2 = (pcre_uchar)*ustr2++;
95 if (c1 != c2)
96 return ((c1 > c2) << 1) - 1;
97 }
98 /* Both length and characters must be equal. */
99 return 0;
100 }
101
102 /* The following two functions compares two, fixed length
103 strings. Basically an strncmp for non 8 bit characters.
104
105 Arguments:
106 str1 first string
107 str2 second string
108 num size of the string
109
110 Returns: 0 if both string are equal (like strcmp), 1 otherwise
111 */
112
113 int
114 PRIV(strncmp_uc_uc)(const pcre_uchar *str1, const pcre_uchar *str2, unsigned int num)
115 {
116 pcre_uchar c1;
117 pcre_uchar c2;
118
119 while (num-- > 0)
120 {
121 c1 = *str1++;
122 c2 = *str2++;
123 if (c1 != c2)
124 return ((c1 > c2) << 1) - 1;
125 }
126 /* Both length and characters must be equal. */
127 return 0;
128 }
129
130 int
131 PRIV(strncmp_uc_c8)(const pcre_uchar *str1, const char *str2, unsigned int num)
132 {
133 const pcre_uint8 *ustr2 = (pcre_uint8 *)str2;
134 pcre_uchar c1;
135 pcre_uchar c2;
136
137 while (num-- > 0)
138 {
139 c1 = *str1++;
140 c2 = (pcre_uchar)*ustr2++;
141 if (c1 != c2)
142 return ((c1 > c2) << 1) - 1;
143 }
144 /* Both length and characters must be equal. */
145 return 0;
146 }
147
148 /* The following function returns with the length of
149 a zero terminated string. Basically an strlen for non 8 bit characters.
150
151 Arguments:
152 str string
153
154 Returns: length of the string
155 */
156
157 unsigned int
158 PRIV(strlen_uc)(const pcre_uchar *str)
159 {
160 unsigned int len = 0;
161 while (*str++ != 0)
162 len++;
163 return len;
164 }
165
166 #endif /* COMPILE_PCRE8 */
167
168 /* End of pcre_string_utils.c */

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