Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/lib/slist.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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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 - 2016, 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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23 #include "curl_setup.h"
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25 #include <curl/curl.h>
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27 #include "slist.h"
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29 /* The last #include files should be: */
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30 #include "curl_memory.h"
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31 #include "memdebug.h"
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33 /* returns last node in linked list */
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34 static struct curl_slist *slist_get_last(struct curl_slist *list)
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35 {
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36 struct curl_slist *item;
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38 /* if caller passed us a NULL, return now */
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39 if(!list)
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40 return NULL;
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42 /* loop through to find the last item */
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43 item = list;
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44 while(item->next) {
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45 item = item->next;
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46 }
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47 return item;
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48 }
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50 /*
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51 * Curl_slist_append_nodup() appends a string to the linked list. Rather than
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52 * copying the string in dynamic storage, it takes its ownership. The string
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53 * should have been malloc()ated. Curl_slist_append_nodup always returns
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54 * the address of the first record, so that you can use this function as an
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55 * initialization function as well as an append function.
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56 * If an error occurs, NULL is returned and the string argument is NOT
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57 * released.
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58 */
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59 struct curl_slist *Curl_slist_append_nodup(struct curl_slist *list, char *data)
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60 {
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61 struct curl_slist *last;
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62 struct curl_slist *new_item;
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63
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64 DEBUGASSERT(data);
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65
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66 new_item = malloc(sizeof(struct curl_slist));
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67 if(!new_item)
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68 return NULL;
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70 new_item->next = NULL;
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71 new_item->data = data;
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72
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73 /* if this is the first item, then new_item *is* the list */
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74 if(!list)
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75 return new_item;
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77 last = slist_get_last(list);
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78 last->next = new_item;
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79 return list;
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80 }
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81
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82 /*
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83 * curl_slist_append() appends a string to the linked list. It always returns
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84 * the address of the first record, so that you can use this function as an
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85 * initialization function as well as an append function. If you find this
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86 * bothersome, then simply create a separate _init function and call it
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87 * appropriately from within the program.
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88 */
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89 struct curl_slist *curl_slist_append(struct curl_slist *list,
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90 const char *data)
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91 {
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92 char *dupdata = strdup(data);
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93
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94 if(!dupdata)
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95 return NULL;
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96
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97 list = Curl_slist_append_nodup(list, dupdata);
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98 if(!list)
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99 free(dupdata);
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100
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101 return list;
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102 }
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103
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104 /*
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105 * Curl_slist_duplicate() duplicates a linked list. It always returns the
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106 * address of the first record of the cloned list or NULL in case of an
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107 * error (or if the input list was NULL).
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108 */
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109 struct curl_slist *Curl_slist_duplicate(struct curl_slist *inlist)
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110 {
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111 struct curl_slist *outlist = NULL;
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112 struct curl_slist *tmp;
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113
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114 while(inlist) {
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115 tmp = curl_slist_append(outlist, inlist->data);
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116
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117 if(!tmp) {
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118 curl_slist_free_all(outlist);
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119 return NULL;
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120 }
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121
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122 outlist = tmp;
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123 inlist = inlist->next;
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124 }
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125 return outlist;
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126 }
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127
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128 /* be nice and clean up resources */
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129 void curl_slist_free_all(struct curl_slist *list)
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130 {
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131 struct curl_slist *next;
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132 struct curl_slist *item;
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133
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134 if(!list)
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135 return;
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136
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137 item = list;
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138 do {
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139 next = item->next;
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140 Curl_safefree(item->data);
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141 free(item);
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142 item = next;
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143 } while(next);
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144 }