glib/pcre/pcre_string_utils.c

   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 */