/[pcre]/code/trunk/pcre_string_utils.c
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Contents of /code/trunk/pcre_string_utils.c

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Revision 1335 - (show annotations)
Tue May 28 09:13:59 2013 UTC (6 years, 3 months ago) by ph10
File MIME type: text/plain
File size: 5389 byte(s)
Final source file tidies for 8.33 release.
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) 1997-2013 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 comparing and finding the length
42 of strings for different data item sizes. */
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 a 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 #ifdef COMPILE_PCRE32
85
86 int
87 PRIV(strcmp_uc_uc_utf)(const pcre_uchar *str1, const pcre_uchar *str2)
88 {
89 pcre_uchar c1;
90 pcre_uchar c2;
91
92 while (*str1 != '\0' || *str2 != '\0')
93 {
94 c1 = RAWUCHARINC(str1);
95 c2 = RAWUCHARINC(str2);
96 if (c1 != c2)
97 return ((c1 > c2) << 1) - 1;
98 }
99 /* Both length and characters must be equal. */
100 return 0;
101 }
102
103 #endif /* COMPILE_PCRE32 */
104
105 int
106 PRIV(strcmp_uc_c8)(const pcre_uchar *str1, const char *str2)
107 {
108 const pcre_uint8 *ustr2 = (pcre_uint8 *)str2;
109 pcre_uchar c1;
110 pcre_uchar c2;
111
112 while (*str1 != '\0' || *ustr2 != '\0')
113 {
114 c1 = *str1++;
115 c2 = (pcre_uchar)*ustr2++;
116 if (c1 != c2)
117 return ((c1 > c2) << 1) - 1;
118 }
119 /* Both length and characters must be equal. */
120 return 0;
121 }
122
123 #ifdef COMPILE_PCRE32
124
125 int
126 PRIV(strcmp_uc_c8_utf)(const pcre_uchar *str1, const char *str2)
127 {
128 const pcre_uint8 *ustr2 = (pcre_uint8 *)str2;
129 pcre_uchar c1;
130 pcre_uchar c2;
131
132 while (*str1 != '\0' || *ustr2 != '\0')
133 {
134 c1 = RAWUCHARINC(str1);
135 c2 = (pcre_uchar)*ustr2++;
136 if (c1 != c2)
137 return ((c1 > c2) << 1) - 1;
138 }
139 /* Both length and characters must be equal. */
140 return 0;
141 }
142
143 #endif /* COMPILE_PCRE32 */
144
145 /* The following two functions compares two, fixed length
146 strings. Basically an strncmp for non 8 bit characters.
147
148 Arguments:
149 str1 first string
150 str2 second string
151 num size of the string
152
153 Returns: 0 if both string are equal (like strcmp), 1 otherwise
154 */
155
156 int
157 PRIV(strncmp_uc_uc)(const pcre_uchar *str1, const pcre_uchar *str2, unsigned int num)
158 {
159 pcre_uchar c1;
160 pcre_uchar c2;
161
162 while (num-- > 0)
163 {
164 c1 = *str1++;
165 c2 = *str2++;
166 if (c1 != c2)
167 return ((c1 > c2) << 1) - 1;
168 }
169 /* Both length and characters must be equal. */
170 return 0;
171 }
172
173 int
174 PRIV(strncmp_uc_c8)(const pcre_uchar *str1, const char *str2, unsigned int num)
175 {
176 const pcre_uint8 *ustr2 = (pcre_uint8 *)str2;
177 pcre_uchar c1;
178 pcre_uchar c2;
179
180 while (num-- > 0)
181 {
182 c1 = *str1++;
183 c2 = (pcre_uchar)*ustr2++;
184 if (c1 != c2)
185 return ((c1 > c2) << 1) - 1;
186 }
187 /* Both length and characters must be equal. */
188 return 0;
189 }
190
191 /* The following function returns with the length of
192 a zero terminated string. Basically an strlen for non 8 bit characters.
193
194 Arguments:
195 str string
196
197 Returns: length of the string
198 */
199
200 unsigned int
201 PRIV(strlen_uc)(const pcre_uchar *str)
202 {
203 unsigned int len = 0;
204 while (*str++ != 0)
205 len++;
206 return len;
207 }
208
209 #endif /* !COMPILE_PCRE8 */
210
211 /* End of pcre_string_utils.c */

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