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| 1 // Copyright 2012 Google Inc. All Rights Reserved. |
| 2 // |
| 3 // This code is licensed under the same terms as WebM: |
| 4 // Software License Agreement: http://www.webmproject.org/license/software/ |
| 5 // Additional IP Rights Grant: http://www.webmproject.org/license/additional/ |
| 6 // ----------------------------------------------------------------------------- |
| 7 // |
| 8 // Misc. common utility functions |
| 9 // |
| 10 // Author: Skal (pascal.massimino@gmail.com) |
| 11 |
| 12 #include <stdlib.h> |
| 13 #include "./utils.h" |
| 14 |
| 15 #if defined(__cplusplus) || defined(c_plusplus) |
| 16 extern "C" { |
| 17 #endif |
| 18 |
| 19 //------------------------------------------------------------------------------ |
| 20 // Checked memory allocation |
| 21 |
| 22 static int CheckSizeArguments(uint64_t nmemb, size_t size) { |
| 23 const uint64_t total_size = nmemb * size; |
| 24 if (nmemb == 0) return 1; |
| 25 if ((uint64_t)size > WEBP_MAX_ALLOCABLE_MEMORY / nmemb) return 0; |
| 26 if (total_size != (size_t)total_size) return 0; |
| 27 return 1; |
| 28 } |
| 29 |
| 30 void* WebPSafeMalloc(uint64_t nmemb, size_t size) { |
| 31 if (!CheckSizeArguments(nmemb, size)) return NULL; |
| 32 return malloc((size_t)(nmemb * size)); |
| 33 } |
| 34 |
| 35 void* WebPSafeCalloc(uint64_t nmemb, size_t size) { |
| 36 if (!CheckSizeArguments(nmemb, size)) return NULL; |
| 37 return calloc((size_t)nmemb, size); |
| 38 } |
| 39 |
| 40 //------------------------------------------------------------------------------ |
| 41 |
| 42 #if defined(__cplusplus) || defined(c_plusplus) |
| 43 } // extern "C" |
| 44 #endif |
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