Mercurial > hgrepos > Python2 > PyMuPDF

comparison mupdf-source/thirdparty/curl/lib/strdup.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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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22
23 #include "curl_setup.h"
24
25 #include <curl/curl.h>
26
27 #include "strdup.h"
28 #include "curl_memory.h"
29
30 /* The last #include file should be: */
31 #include "memdebug.h"
32
33 #ifndef HAVE_STRDUP
34 char *curlx_strdup(const char *str)
35 {
36 size_t len;
37 char *newstr;
38
39 if(!str)
40 return (char *)NULL;
41
42 len = strlen(str);
43
44 if(len >= ((size_t)-1) / sizeof(char))
45 return (char *)NULL;
46
47 newstr = malloc((len + 1)*sizeof(char));
48 if(!newstr)
49 return (char *)NULL;
50
51 memcpy(newstr, str, (len + 1)*sizeof(char));
52
53 return newstr;
54
55 }
56 #endif
57
58 /***************************************************************************
59 *
60 * Curl_memdup(source, length)
61 *
62 * Copies the 'source' data to a newly allocated buffer (that is
63 * returned). Copies 'length' bytes.
64 *
65 * Returns the new pointer or NULL on failure.
66 *
67 ***************************************************************************/
68 void *Curl_memdup(const void *src, size_t length)
69 {
70 void *buffer = malloc(length);
71 if(!buffer)
72 return NULL; /* fail */
73
74 memcpy(buffer, src, length);
75
76 return buffer;
77 }
78
79 /***************************************************************************
80 *
81 * Curl_saferealloc(ptr, size)
82 *
83 * Does a normal realloc(), but will free the data pointer if the realloc
84 * fails. If 'size' is non-zero, it will free the data and return a failure.
85 *
86 * This convenience function is provided and used to help us avoid a common
87 * mistake pattern when we could pass in a zero, catch the NULL return and end
88 * up free'ing the memory twice.
89 *
90 * Returns the new pointer or NULL on failure.
91 *
92 ***************************************************************************/
93 void *Curl_saferealloc(void *ptr, size_t size)
94 {
95 void *datap = realloc(ptr, size);
96 if(size && !datap)
97 /* only free 'ptr' if size was non-zero */
98 free(ptr);
99 return datap;
100 }