Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/lib/curl_memory.h @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
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1 #ifndef HEADER_CURL_MEMORY_H
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2 #define HEADER_CURL_MEMORY_H
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3 /***************************************************************************
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4 * _ _ ____ _
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5 * Project ___| | | | _ \| |
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6 * / __| | | | |_) | |
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7 * | (__| |_| | _ <| |___
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8 * \___|\___/|_| \_\_____|
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9 *
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10 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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11 *
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12 * This software is licensed as described in the file COPYING, which
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13 * you should have received as part of this distribution. The terms
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14 * are also available at https://curl.haxx.se/docs/copyright.html.
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15 *
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16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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17 * copies of the Software, and permit persons to whom the Software is
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18 * furnished to do so, under the terms of the COPYING file.
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19 *
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20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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21 * KIND, either express or implied.
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22 *
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23 ***************************************************************************/
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24
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25 /*
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26 * Nasty internal details ahead...
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27 *
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28 * File curl_memory.h must be included by _all_ *.c source files
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29 * that use memory related functions strdup, malloc, calloc, realloc
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30 * or free, and given source file is used to build libcurl library.
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31 * It should be included immediately before memdebug.h as the last files
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32 * included to avoid undesired interaction with other memory function
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33 * headers in dependent libraries.
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34 *
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35 * There is nearly no exception to above rule. All libcurl source
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36 * files in 'lib' subdirectory as well as those living deep inside
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37 * 'packages' subdirectories and linked together in order to build
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38 * libcurl library shall follow it.
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39 *
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40 * File lib/strdup.c is an exception, given that it provides a strdup
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41 * clone implementation while using malloc. Extra care needed inside
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42 * this one.
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43 *
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44 * The need for curl_memory.h inclusion is due to libcurl's feature
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45 * of allowing library user to provide memory replacement functions,
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46 * memory callbacks, at runtime with curl_global_init_mem()
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47 *
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48 * Any *.c source file used to build libcurl library that does not
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49 * include curl_memory.h and uses any memory function of the five
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50 * mentioned above will compile without any indication, but it will
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51 * trigger weird memory related issues at runtime.
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52 *
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53 * OTOH some source files from 'lib' subdirectory may additionally be
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54 * used directly as source code when using some curlx_ functions by
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55 * third party programs that don't even use libcurl at all. When using
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56 * these source files in this way it is necessary these are compiled
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57 * with CURLX_NO_MEMORY_CALLBACKS defined, in order to ensure that no
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58 * attempt of calling libcurl's memory callbacks is done from code
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59 * which can not use this machinery.
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60 *
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61 * Notice that libcurl's 'memory tracking' system works chaining into
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62 * the memory callback machinery. This implies that when compiling
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63 * 'lib' source files with CURLX_NO_MEMORY_CALLBACKS defined this file
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64 * disengages usage of libcurl's 'memory tracking' system, defining
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65 * MEMDEBUG_NODEFINES and overriding CURLDEBUG purpose.
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66 *
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67 * CURLX_NO_MEMORY_CALLBACKS takes precedence over CURLDEBUG. This is
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68 * done in order to allow building a 'memory tracking' enabled libcurl
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69 * and at the same time allow building programs which do not use it.
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70 *
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71 * Programs and libraries in 'tests' subdirectories have specific
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72 * purposes and needs, and as such each one will use whatever fits
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73 * best, depending additionally whether it links with libcurl or not.
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74 *
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75 * Caveat emptor. Proper curlx_* separation is a work in progress
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76 * the same as CURLX_NO_MEMORY_CALLBACKS usage, some adjustments may
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77 * still be required. IOW don't use them yet, there are sharp edges.
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78 */
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79
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80 #ifdef HEADER_CURL_MEMDEBUG_H
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81 #error "Header memdebug.h shall not be included before curl_memory.h"
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82 #endif
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83
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84 #ifndef CURLX_NO_MEMORY_CALLBACKS
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85
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86 #ifndef CURL_DID_MEMORY_FUNC_TYPEDEFS /* only if not already done */
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87 /*
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88 * The following memory function replacement typedef's are COPIED from
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89 * curl/curl.h and MUST match the originals. We copy them to avoid having to
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90 * include curl/curl.h here. We avoid that include since it includes stdio.h
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91 * and other headers that may get messed up with defines done here.
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92 */
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93 typedef void *(*curl_malloc_callback)(size_t size);
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94 typedef void (*curl_free_callback)(void *ptr);
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95 typedef void *(*curl_realloc_callback)(void *ptr, size_t size);
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96 typedef char *(*curl_strdup_callback)(const char *str);
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97 typedef void *(*curl_calloc_callback)(size_t nmemb, size_t size);
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98 #define CURL_DID_MEMORY_FUNC_TYPEDEFS
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99 #endif
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100
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101 extern curl_malloc_callback Curl_cmalloc;
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102 extern curl_free_callback Curl_cfree;
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103 extern curl_realloc_callback Curl_crealloc;
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104 extern curl_strdup_callback Curl_cstrdup;
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105 extern curl_calloc_callback Curl_ccalloc;
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106 #if defined(WIN32) && defined(UNICODE)
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107 extern curl_wcsdup_callback Curl_cwcsdup;
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108 #endif
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109
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110 #ifndef CURLDEBUG
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111
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112 /*
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113 * libcurl's 'memory tracking' system defines strdup, malloc, calloc,
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114 * realloc and free, along with others, in memdebug.h in a different
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115 * way although still using memory callbacks forward declared above.
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116 * When using the 'memory tracking' system (CURLDEBUG defined) we do
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117 * not define here the five memory functions given that definitions
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118 * from memdebug.h are the ones that shall be used.
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119 */
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120
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121 #undef strdup
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122 #define strdup(ptr) Curl_cstrdup(ptr)
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123 #undef malloc
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124 #define malloc(size) Curl_cmalloc(size)
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125 #undef calloc
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126 #define calloc(nbelem,size) Curl_ccalloc(nbelem, size)
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127 #undef realloc
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128 #define realloc(ptr,size) Curl_crealloc(ptr, size)
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129 #undef free
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130 #define free(ptr) Curl_cfree(ptr)
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131
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132 #ifdef WIN32
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133 # ifdef UNICODE
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134 # undef wcsdup
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135 # define wcsdup(ptr) Curl_cwcsdup(ptr)
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136 # undef _wcsdup
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137 # define _wcsdup(ptr) Curl_cwcsdup(ptr)
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138 # undef _tcsdup
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139 # define _tcsdup(ptr) Curl_cwcsdup(ptr)
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140 # else
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141 # undef _tcsdup
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142 # define _tcsdup(ptr) Curl_cstrdup(ptr)
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143 # endif
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144 #endif
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145
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146 #endif /* CURLDEBUG */
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147
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148 #else /* CURLX_NO_MEMORY_CALLBACKS */
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149
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150 #ifndef MEMDEBUG_NODEFINES
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151 #define MEMDEBUG_NODEFINES
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152 #endif
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153
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154 #endif /* CURLX_NO_MEMORY_CALLBACKS */
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155
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156 #endif /* HEADER_CURL_MEMORY_H */