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