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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 */