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) 1997-2012 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 #include "config.h"
46
47 #include "pcre_internal.h"
48
49 #ifndef COMPILE_PCRE8
50
51 /*************************************************
52 * Compare string utilities *
53 *************************************************/
54
55 /* The following two functions compares two strings. Basically an strcmp
56 for non 8 bit characters.
57
58 Arguments:
59 str1 first string
60 str2 second string
61
62 Returns: 0 if both string are equal (like strcmp), 1 otherwise
63 */
64
65 int
PRIV(strcmp_uc_uc)66 PRIV(strcmp_uc_uc)(const pcre_uchar *str1, const pcre_uchar *str2)
67 {
68 pcre_uchar c1;
69 pcre_uchar c2;
70
71 while (*str1 != '\0' || *str2 != '\0')
72 {
73 c1 = *str1++;
74 c2 = *str2++;
75 if (c1 != c2)
76 return ((c1 > c2) << 1) - 1;
77 }
78 /* Both length and characters must be equal. */
79 return 0;
80 }
81
82 int
PRIV(strcmp_uc_c8)83 PRIV(strcmp_uc_c8)(const pcre_uchar *str1, const char *str2)
84 {
85 const pcre_uint8 *ustr2 = (pcre_uint8 *)str2;
86 pcre_uchar c1;
87 pcre_uchar c2;
88
89 while (*str1 != '\0' || *ustr2 != '\0')
90 {
91 c1 = *str1++;
92 c2 = (pcre_uchar)*ustr2++;
93 if (c1 != c2)
94 return ((c1 > c2) << 1) - 1;
95 }
96 /* Both length and characters must be equal. */
97 return 0;
98 }
99
100 /* The following two functions compares two, fixed length
101 strings. Basically an strncmp for non 8 bit characters.
102
103 Arguments:
104 str1 first string
105 str2 second string
106 num size of the string
107
108 Returns: 0 if both string are equal (like strcmp), 1 otherwise
109 */
110
111 int
PRIV(strncmp_uc_uc)112 PRIV(strncmp_uc_uc)(const pcre_uchar *str1, const pcre_uchar *str2, unsigned int num)
113 {
114 pcre_uchar c1;
115 pcre_uchar c2;
116
117 while (num-- > 0)
118 {
119 c1 = *str1++;
120 c2 = *str2++;
121 if (c1 != c2)
122 return ((c1 > c2) << 1) - 1;
123 }
124 /* Both length and characters must be equal. */
125 return 0;
126 }
127
128 int
PRIV(strncmp_uc_c8)129 PRIV(strncmp_uc_c8)(const pcre_uchar *str1, const char *str2, unsigned int num)
130 {
131 const pcre_uint8 *ustr2 = (pcre_uint8 *)str2;
132 pcre_uchar c1;
133 pcre_uchar c2;
134
135 while (num-- > 0)
136 {
137 c1 = *str1++;
138 c2 = (pcre_uchar)*ustr2++;
139 if (c1 != c2)
140 return ((c1 > c2) << 1) - 1;
141 }
142 /* Both length and characters must be equal. */
143 return 0;
144 }
145
146 /* The following function returns with the length of
147 a zero terminated string. Basically an strlen for non 8 bit characters.
148
149 Arguments:
150 str string
151
152 Returns: length of the string
153 */
154
155 unsigned int
PRIV(strlen_uc)156 PRIV(strlen_uc)(const pcre_uchar *str)
157 {
158 unsigned int len = 0;
159 while (*str++ != 0)
160 len++;
161 return len;
162 }
163
164 #endif /* COMPILE_PCRE8 */
165
166 /* End of pcre_string_utils.c */
167