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) 1997-2014 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 internal functions for comparing and finding the length
42of 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
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
84#ifdef COMPILE_PCRE32
85
86int
87PRIV(strcmp_uc_uc_utf)(const pcre_uchar *str1, const pcre_uchar *str2)
88{
89pcre_uchar c1;
90pcre_uchar c2;
91
92while (*str1 != '\0' || *str2 != '\0')
93  {
94  c1 = UCHAR21INC(str1);
95  c2 = UCHAR21INC(str2);
96  if (c1 != c2)
97    return ((c1 > c2) << 1) - 1;
98  }
99/* Both length and characters must be equal. */
100return 0;
101}
102
103#endif /* COMPILE_PCRE32 */
104
105int
106PRIV(strcmp_uc_c8)(const pcre_uchar *str1, const char *str2)
107{
108const pcre_uint8 *ustr2 = (pcre_uint8 *)str2;
109pcre_uchar c1;
110pcre_uchar c2;
111
112while (*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. */
120return 0;
121}
122
123#ifdef COMPILE_PCRE32
124
125int
126PRIV(strcmp_uc_c8_utf)(const pcre_uchar *str1, const char *str2)
127{
128const pcre_uint8 *ustr2 = (pcre_uint8 *)str2;
129pcre_uchar c1;
130pcre_uchar c2;
131
132while (*str1 != '\0' || *ustr2 != '\0')
133  {
134  c1 = UCHAR21INC(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. */
140return 0;
141}
142
143#endif /* COMPILE_PCRE32 */
144
145/* The following two functions compares two, fixed length
146strings. Basically an strncmp for non 8 bit characters.
147
148Arguments:
149  str1        first string
150  str2        second string
151  num         size of the string
152
153Returns:      0 if both string are equal (like strcmp), 1 otherwise
154*/
155
156int
157PRIV(strncmp_uc_uc)(const pcre_uchar *str1, const pcre_uchar *str2, unsigned int num)
158{
159pcre_uchar c1;
160pcre_uchar c2;
161
162while (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. */
170return 0;
171}
172
173int
174PRIV(strncmp_uc_c8)(const pcre_uchar *str1, const char *str2, unsigned int num)
175{
176const pcre_uint8 *ustr2 = (pcre_uint8 *)str2;
177pcre_uchar c1;
178pcre_uchar c2;
179
180while (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. */
188return 0;
189}
190
191/* The following function returns with the length of
192a zero terminated string. Basically an strlen for non 8 bit characters.
193
194Arguments:
195  str         string
196
197Returns:      length of the string
198*/
199
200unsigned int
201PRIV(strlen_uc)(const pcre_uchar *str)
202{
203unsigned int len = 0;
204while (*str++ != 0)
205  len++;
206return len;
207}
208
209#endif /* !COMPILE_PCRE8 */
210
211/* End of pcre_string_utils.c */
212