Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/lib/strcase.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /***************************************************************************
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2 * _ _ ____ _
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3 * Project ___| | | | _ \| |
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4 * / __| | | | |_) | |
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5 * | (__| |_| | _ <| |___
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6 * \___|\___/|_| \_\_____|
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7 *
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8 * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 *
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10 * This software is licensed as described in the file COPYING, which
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11 * you should have received as part of this distribution. The terms
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12 * are also available at https://curl.haxx.se/docs/copyright.html.
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13 *
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14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 * copies of the Software, and permit persons to whom the Software is
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16 * furnished to do so, under the terms of the COPYING file.
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17 *
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18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 * KIND, either express or implied.
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20 *
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21 ***************************************************************************/
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22
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23 #include "curl_setup.h"
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24
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25 #include <curl/curl.h>
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26
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27 #include "strcase.h"
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28
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29 /* Portable, consistent toupper (remember EBCDIC). Do not use toupper() because
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30 its behavior is altered by the current locale. */
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31 char Curl_raw_toupper(char in)
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32 {
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33 #if !defined(CURL_DOES_CONVERSIONS)
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34 if(in >= 'a' && in <= 'z')
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35 return (char)('A' + in - 'a');
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36 #else
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37 switch(in) {
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38 case 'a':
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39 return 'A';
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40 case 'b':
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41 return 'B';
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42 case 'c':
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43 return 'C';
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44 case 'd':
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45 return 'D';
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46 case 'e':
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47 return 'E';
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48 case 'f':
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49 return 'F';
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50 case 'g':
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51 return 'G';
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52 case 'h':
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53 return 'H';
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54 case 'i':
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55 return 'I';
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56 case 'j':
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57 return 'J';
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58 case 'k':
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59 return 'K';
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60 case 'l':
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61 return 'L';
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62 case 'm':
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63 return 'M';
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64 case 'n':
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65 return 'N';
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66 case 'o':
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67 return 'O';
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68 case 'p':
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69 return 'P';
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70 case 'q':
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71 return 'Q';
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72 case 'r':
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73 return 'R';
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74 case 's':
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75 return 'S';
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76 case 't':
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77 return 'T';
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78 case 'u':
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79 return 'U';
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80 case 'v':
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81 return 'V';
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82 case 'w':
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83 return 'W';
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84 case 'x':
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85 return 'X';
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86 case 'y':
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87 return 'Y';
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88 case 'z':
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89 return 'Z';
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90 }
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91 #endif
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92
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93 return in;
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94 }
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95
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96 /*
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97 * Curl_strcasecompare() is for doing "raw" case insensitive strings. This is
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98 * meant to be locale independent and only compare strings we know are safe
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99 * for this. See
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100 * https://daniel.haxx.se/blog/2008/10/15/strcasecmp-in-turkish/ for some
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101 * further explanation to why this function is necessary.
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102 *
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103 * The function is capable of comparing a-z case insensitively even for
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104 * non-ascii.
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105 *
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106 * @unittest: 1301
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107 */
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108
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109 int Curl_strcasecompare(const char *first, const char *second)
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110 {
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111 while(*first && *second) {
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112 if(Curl_raw_toupper(*first) != Curl_raw_toupper(*second))
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113 /* get out of the loop as soon as they don't match */
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114 break;
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115 first++;
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116 second++;
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117 }
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118 /* we do the comparison here (possibly again), just to make sure that if the
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119 loop above is skipped because one of the strings reached zero, we must not
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120 return this as a successful match */
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121 return (Curl_raw_toupper(*first) == Curl_raw_toupper(*second));
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122 }
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123
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124 int Curl_safe_strcasecompare(const char *first, const char *second)
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125 {
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126 if(first && second)
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127 /* both pointers point to something then compare them */
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128 return Curl_strcasecompare(first, second);
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129
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130 /* if both pointers are NULL then treat them as equal */
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131 return (NULL == first && NULL == second);
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132 }
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133
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134 /*
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135 * @unittest: 1301
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136 */
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137 int Curl_strncasecompare(const char *first, const char *second, size_t max)
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138 {
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139 while(*first && *second && max) {
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140 if(Curl_raw_toupper(*first) != Curl_raw_toupper(*second)) {
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141 break;
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142 }
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143 max--;
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144 first++;
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145 second++;
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146 }
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147 if(0 == max)
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148 return 1; /* they are equal this far */
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149
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150 return Curl_raw_toupper(*first) == Curl_raw_toupper(*second);
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151 }
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152
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153 /* Copy an upper case version of the string from src to dest. The
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154 * strings may overlap. No more than n characters of the string are copied
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155 * (including any NUL) and the destination string will NOT be
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156 * NUL-terminated if that limit is reached.
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157 */
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158 void Curl_strntoupper(char *dest, const char *src, size_t n)
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159 {
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160 if(n < 1)
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161 return;
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162
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163 do {
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164 *dest++ = Curl_raw_toupper(*src);
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165 } while(*src++ && --n);
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166 }
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167
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168 /* --- public functions --- */
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169
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170 int curl_strequal(const char *first, const char *second)
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171 {
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172 return Curl_strcasecompare(first, second);
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173 }
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174 int curl_strnequal(const char *first, const char *second, size_t max)
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175 {
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176 return Curl_strncasecompare(first, second, max);
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177 }