Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | * _ _ ____ _ |
| 3 | * Project ___| | | | _ \| | |
| 4 | * / __| | | | |_) | | |
| 5 | * | (__| |_| | _ <| |___ |
| 6 | * \___|\___/|_| \_\_____| |
| 7 | * |
Alex Deymo | 486467e | 2017-12-19 19:04:07 +0100 | [diff] [blame] | 8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al. |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 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 |
Alex Deymo | 8f1a214 | 2016-06-28 14:49:26 -0700 | [diff] [blame] | 12 | * are also available at https://curl.haxx.se/docs/copyright.html. |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 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 | ***************************************************************************/ |
Alex Deymo | 8f1a214 | 2016-06-28 14:49:26 -0700 | [diff] [blame] | 22 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 23 | #include "curl_setup.h" |
Alex Deymo | 8f1a214 | 2016-06-28 14:49:26 -0700 | [diff] [blame] | 24 | |
| 25 | #include <curl/curl.h> |
| 26 | |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 27 | #include "strdup.h" |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 28 | #include "curl_memory.h" |
| 29 | |
| 30 | /* The last #include file should be: */ |
| 31 | #include "memdebug.h" |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 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 | |
Alex Deymo | 486467e | 2017-12-19 19:04:07 +0100 | [diff] [blame] | 47 | newstr = malloc((len + 1)*sizeof(char)); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 48 | if(!newstr) |
| 49 | return (char *)NULL; |
| 50 | |
Alex Deymo | 486467e | 2017-12-19 19:04:07 +0100 | [diff] [blame] | 51 | memcpy(newstr, str, (len + 1)*sizeof(char)); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 52 | |
| 53 | return newstr; |
| 54 | |
| 55 | } |
| 56 | #endif |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 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 | ***************************************************************************/ |
Elliott Hughes | cee0338 | 2017-06-23 12:17:18 -0700 | [diff] [blame] | 68 | void *Curl_memdup(const void *src, size_t length) |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 69 | { |
Elliott Hughes | cee0338 | 2017-06-23 12:17:18 -0700 | [diff] [blame] | 70 | void *buffer = malloc(length); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 71 | if(!buffer) |
| 72 | return NULL; /* fail */ |
| 73 | |
| 74 | memcpy(buffer, src, length); |
| 75 | |
| 76 | return buffer; |
| 77 | } |
Elliott Hughes | cee0338 | 2017-06-23 12:17:18 -0700 | [diff] [blame] | 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 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 | } |