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Diffstat (limited to 'src/3rdparty/libwebp/src/utils/utils.c')
-rw-r--r-- | src/3rdparty/libwebp/src/utils/utils.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/3rdparty/libwebp/src/utils/utils.c b/src/3rdparty/libwebp/src/utils/utils.c new file mode 100644 index 0000000..5592538 --- /dev/null +++ b/src/3rdparty/libwebp/src/utils/utils.c @@ -0,0 +1,42 @@ +// 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); +} + +//------------------------------------------------------------------------------ + |