43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
|
// 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"
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
// 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);
|
||
|
|
}
|
||
|
|
|
||
|
|
//------------------------------------------------------------------------------
|
||
|
|
|