// Copyright 2012 Google Inc. All Rights Reserved. // // Use of this source code is governed by a BSD-style license // that can be found in the COPYING file in the root of the source // tree. An additional intellectual property rights grant can be found // in the file PATENTS. All contributing project authors may // be found in the AUTHORS file in the root of the source tree. // ----------------------------------------------------------------------------- // // Misc. common utility functions // // Author: Skal (pascal.massimino@gmail.com) #include <stdlib.h> #include "./utils.h" #if defined(__cplusplus) || defined(c_plusplus) extern "C" { #endif //------------------------------------------------------------------------------ // Checked memory allocation // Returns 0 in case of overflow of nmemb * size. static int CheckSizeArgumentsOverflow(uint64_t nmemb, size_t size) { const uint64_t total_size = nmemb * size; if (nmemb == 0) return 1; if ((uint64_t)size > WEBP_MAX_ALLOCABLE_MEMORY / nmemb) return 0; if (total_size != (size_t)total_size) return 0; return 1; } void* WebPSafeMalloc(uint64_t nmemb, size_t size) { if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL; assert(nmemb * size > 0); return malloc((size_t)(nmemb * size)); } void* WebPSafeCalloc(uint64_t nmemb, size_t size) { if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL; assert(nmemb * size > 0); return calloc((size_t)nmemb, size); } //------------------------------------------------------------------------------ #if defined(__cplusplus) || defined(c_plusplus) } // extern "C" #endif