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Open Source Computer Vision Library
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47 lines
1.5 KiB
47 lines
1.5 KiB
// Copyright 2012 Google Inc. All Rights Reserved. |
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// |
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// This code is licensed under the same terms as WebM: |
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// Software License Agreement: http://www.webmproject.org/license/software/ |
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// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ |
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// ----------------------------------------------------------------------------- |
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// |
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// Misc. common utility functions |
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// |
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// Author: Skal (pascal.massimino@gmail.com) |
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#include <stdlib.h> |
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#include "./utils.h" |
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#if defined(__cplusplus) || defined(c_plusplus) |
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extern "C" { |
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#endif |
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//------------------------------------------------------------------------------ |
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// Checked memory allocation |
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// Returns 0 in case of overflow of nmemb * size. |
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static int CheckSizeArgumentsOverflow(uint64_t nmemb, size_t size) { |
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const uint64_t total_size = nmemb * size; |
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if (nmemb == 0) return 1; |
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if ((uint64_t)size > WEBP_MAX_ALLOCABLE_MEMORY / nmemb) return 0; |
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if (total_size != (size_t)total_size) return 0; |
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return 1; |
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} |
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void* WebPSafeMalloc(uint64_t nmemb, size_t size) { |
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if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL; |
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assert(nmemb * size > 0); |
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return malloc((size_t)(nmemb * size)); |
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} |
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void* WebPSafeCalloc(uint64_t nmemb, size_t size) { |
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if (!CheckSizeArgumentsOverflow(nmemb, size)) return NULL; |
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assert(nmemb * size > 0); |
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return calloc((size_t)nmemb, size); |
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} |
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//------------------------------------------------------------------------------ |
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#if defined(__cplusplus) || defined(c_plusplus) |
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} // extern "C" |
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#endif
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