Annotation of embedaddon/pcre/pcre_string_utils.c, revision 1.1.1.1
1.1 misho 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: #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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