Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/lib/strdup.c @ 40:aa33339d6b8a upstream

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ADD: MuPDF v1.26.10: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.5.
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 11:31:38 +0200
parents b50eed0cc0ef
children
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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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23 #include "curl_setup.h"
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25 #include <curl/curl.h>
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27 #include "strdup.h"
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28 #include "curl_memory.h"
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30 /* The last #include file should be: */
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31 #include "memdebug.h"
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33 #ifndef HAVE_STRDUP
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34 char *curlx_strdup(const char *str)
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35 {
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36 size_t len;
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37 char *newstr;
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39 if(!str)
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40 return (char *)NULL;
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42 len = strlen(str);
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44 if(len >= ((size_t)-1) / sizeof(char))
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45 return (char *)NULL;
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47 newstr = malloc((len + 1)*sizeof(char));
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48 if(!newstr)
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49 return (char *)NULL;
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51 memcpy(newstr, str, (len + 1)*sizeof(char));
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53 return newstr;
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55 }
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56 #endif
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58 /***************************************************************************
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59 *
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60 * Curl_memdup(source, length)
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61 *
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62 * Copies the 'source' data to a newly allocated buffer (that is
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63 * returned). Copies 'length' bytes.
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64 *
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65 * Returns the new pointer or NULL on failure.
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66 *
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67 ***************************************************************************/
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68 void *Curl_memdup(const void *src, size_t length)
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69 {
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70 void *buffer = malloc(length);
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71 if(!buffer)
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72 return NULL; /* fail */
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74 memcpy(buffer, src, length);
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76 return buffer;
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77 }
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79 /***************************************************************************
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80 *
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81 * Curl_saferealloc(ptr, size)
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82 *
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83 * Does a normal realloc(), but will free the data pointer if the realloc
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84 * fails. If 'size' is non-zero, it will free the data and return a failure.
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85 *
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86 * This convenience function is provided and used to help us avoid a common
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87 * mistake pattern when we could pass in a zero, catch the NULL return and end
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88 * up free'ing the memory twice.
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89 *
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90 * Returns the new pointer or NULL on failure.
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91 *
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92 ***************************************************************************/
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93 void *Curl_saferealloc(void *ptr, size_t size)
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94 {
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95 void *datap = realloc(ptr, size);
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96 if(size && !datap)
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97 /* only free 'ptr' if size was non-zero */
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98 free(ptr);
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99 return datap;
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100 }