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