15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright 2012 Google Inc. All Rights Reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 3eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// Use of this source code is governed by a BSD-style license 4eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// that can be found in the COPYING file in the root of the source 5eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// tree. An additional intellectual property rights grant can be found 6eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// in the file PATENTS. All contributing project authors may 7eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch// be found in the AUTHORS file in the root of the source tree. 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ----------------------------------------------------------------------------- 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Misc. common utility functions 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Author: Skal (pascal.massimino@gmail.com) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <stdlib.h> 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "./utils.h" 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(__cplusplus) || defined(c_plusplus) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)extern "C" { 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Checked memory allocation 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)// Returns 0 in case of overflow of nmemb * size. 252a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)static int CheckSizeArgumentsOverflow(uint64_t nmemb, size_t size) { 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const uint64_t total_size = nmemb * size; 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (nmemb == 0) return 1; 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((uint64_t)size > WEBP_MAX_ALLOCABLE_MEMORY / nmemb) return 0; 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (total_size != (size_t)total_size) return 0; 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return 1; 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void* WebPSafeMalloc(uint64_t nmemb, size_t size) { 342a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL; 352a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(nmemb * size > 0); 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return malloc((size_t)(nmemb * size)); 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void* WebPSafeCalloc(uint64_t nmemb, size_t size) { 402a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL; 412a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) assert(nmemb * size > 0); 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return calloc((size_t)nmemb, size); 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//------------------------------------------------------------------------------ 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(__cplusplus) || defined(c_plusplus) 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // extern "C" 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 50