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 CheckSizeArguments(uint64_t nmemb,size_t size)22static 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 WebPSafeMalloc(uint64_t nmemb,size_t size)30void* WebPSafeMalloc(uint64_t nmemb, size_t size) { 31 if (!CheckSizeArguments(nmemb, size)) return NULL; 32 return malloc((size_t)(nmemb * size)); 33 } 34 WebPSafeCalloc(uint64_t nmemb,size_t size)35void* 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 45