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)
16extern "C" {
17#endif
18
19//------------------------------------------------------------------------------
20// Checked memory allocation
21
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
30void* WebPSafeMalloc(uint64_t nmemb, size_t size) {
31  if (!CheckSizeArguments(nmemb, size)) return NULL;
32  return malloc((size_t)(nmemb * size));
33}
34
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