1/*************************************************
2*      Perl-Compatible Regular Expressions       *
3*************************************************/
4
5/* PCRE is a library of functions to support regular expressions whose syntax
6and 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-----------------------------------------------------------------------------
12Redistribution and use in source and binary forms, with or without
13modification, 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
26THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
30LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36POSSIBILITY OF SUCH DAMAGE.
37-----------------------------------------------------------------------------
38*/
39
40
41/* This module contains an internal function that is used to match an extended
42class. 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
58for non 8 bit characters.
59
60Arguments:
61  str1        first string
62  str2        second string
63
64Returns:      0 if both string are equal (like strcmp), 1 otherwise
65*/
66
67int
68PRIV(strcmp_uc_uc)(const pcre_uchar *str1, const pcre_uchar *str2)
69{
70pcre_uchar c1;
71pcre_uchar c2;
72
73while (*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. */
81return 0;
82}
83
84int
85PRIV(strcmp_uc_c8)(const pcre_uchar *str1, const char *str2)
86{
87const pcre_uint8 *ustr2 = (pcre_uint8 *)str2;
88pcre_uchar c1;
89pcre_uchar c2;
90
91while (*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. */
99return 0;
100}
101
102/* The following two functions compares two, fixed length
103strings. Basically an strncmp for non 8 bit characters.
104
105Arguments:
106  str1        first string
107  str2        second string
108  num         size of the string
109
110Returns:      0 if both string are equal (like strcmp), 1 otherwise
111*/
112
113int
114PRIV(strncmp_uc_uc)(const pcre_uchar *str1, const pcre_uchar *str2, unsigned int num)
115{
116pcre_uchar c1;
117pcre_uchar c2;
118
119while (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. */
127return 0;
128}
129
130int
131PRIV(strncmp_uc_c8)(const pcre_uchar *str1, const char *str2, unsigned int num)
132{
133const pcre_uint8 *ustr2 = (pcre_uint8 *)str2;
134pcre_uchar c1;
135pcre_uchar c2;
136
137while (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. */
145return 0;
146}
147
148/* The following function returns with the length of
149a zero terminated string. Basically an strlen for non 8 bit characters.
150
151Arguments:
152  str         string
153
154Returns:      length of the string
155*/
156
157unsigned int
158PRIV(strlen_uc)(const pcre_uchar *str)
159{
160unsigned int len = 0;
161while (*str++ != 0)
162  len++;
163return len;
164}
165
166#endif /* COMPILE_PCRE8 */
167
168/* End of pcre_string_utils.c */
169