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) 1997-2014 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 internal functions for comparing and finding the length 42 of 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 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 #ifdef COMPILE_PCRE32 85 86 int 87 PRIV(strcmp_uc_uc_utf)(const pcre_uchar *str1, const pcre_uchar *str2) 88 { 89 pcre_uchar c1; 90 pcre_uchar c2; 91 92 while (*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. */ 100 return 0; 101 } 102 103 #endif /* COMPILE_PCRE32 */ 104 105 int 106 PRIV(strcmp_uc_c8)(const pcre_uchar *str1, const char *str2) 107 { 108 const pcre_uint8 *ustr2 = (pcre_uint8 *)str2; 109 pcre_uchar c1; 110 pcre_uchar c2; 111 112 while (*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. */ 120 return 0; 121 } 122 123 #ifdef COMPILE_PCRE32 124 125 int 126 PRIV(strcmp_uc_c8_utf)(const pcre_uchar *str1, const char *str2) 127 { 128 const pcre_uint8 *ustr2 = (pcre_uint8 *)str2; 129 pcre_uchar c1; 130 pcre_uchar c2; 131 132 while (*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. */ 140 return 0; 141 } 142 143 #endif /* COMPILE_PCRE32 */ 144 145 /* The following two functions compares two, fixed length 146 strings. Basically an strncmp for non 8 bit characters. 147 148 Arguments: 149 str1 first string 150 str2 second string 151 num size of the string 152 153 Returns: 0 if both string are equal (like strcmp), 1 otherwise 154 */ 155 156 int 157 PRIV(strncmp_uc_uc)(const pcre_uchar *str1, const pcre_uchar *str2, unsigned int num) 158 { 159 pcre_uchar c1; 160 pcre_uchar c2; 161 162 while (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. */ 170 return 0; 171 } 172 173 int 174 PRIV(strncmp_uc_c8)(const pcre_uchar *str1, const char *str2, unsigned int num) 175 { 176 const pcre_uint8 *ustr2 = (pcre_uint8 *)str2; 177 pcre_uchar c1; 178 pcre_uchar c2; 179 180 while (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. */ 188 return 0; 189 } 190 191 /* The following function returns with the length of 192 a zero terminated string. Basically an strlen for non 8 bit characters. 193 194 Arguments: 195 str string 196 197 Returns: length of the string 198 */ 199 200 unsigned int 201 PRIV(strlen_uc)(const pcre_uchar *str) 202 { 203 unsigned int len = 0; 204 while (*str++ != 0) 205 len++; 206 return len; 207 } 208 209 #endif /* !COMPILE_PCRE8 */ 210 211 /* End of pcre_string_utils.c */ 212
