[337] | 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 "strdup.h"
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| 28 | #include "curl_memory.h"
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| 29 |
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| 30 | /* The last #include file should be: */
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| 31 | #include "memdebug.h"
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| 32 |
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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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| 38 |
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| 39 | if(!str)
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| 40 | return (char *)NULL;
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| 41 |
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| 42 | len = strlen(str);
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| 43 |
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| 44 | if(len >= ((size_t)-1) / sizeof(char))
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| 45 | return (char *)NULL;
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| 46 |
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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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| 50 |
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| 51 | memcpy(newstr, str, (len + 1)*sizeof(char));
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| 52 |
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| 53 | return newstr;
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| 54 |
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| 55 | }
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| 56 | #endif
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| 57 |
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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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| 73 |
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| 74 | memcpy(buffer, src, length);
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| 75 |
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| 76 | return buffer;
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| 77 | }
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| 78 |
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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 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 | }
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