libwebp-0.5.2-rc2

third_party/libwebp/utils/utils.h

 // 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
 //
 // Authors: Skal (pascal.massimino@gmail.com)
 //          Urvang (urvang@google.com)
 
 #ifndef WEBP_UTILS_UTILS_H_
 #define WEBP_UTILS_UTILS_H_
 
 #ifdef HAVE_CONFIG_H
 #include "../webp/config.h"
 #endif
 
 #include <assert.h>
+#include <limits.h>
 
 #include "../dsp/dsp.h"
 #include "../webp/types.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 //------------------------------------------------------------------------------
 // Memory allocation
 
 // This is the maximum memory amount that libwebp will ever try to allocate.
-#define WEBP_MAX_ALLOCABLE_MEMORY (1ULL << 40)
+#ifndef WEBP_MAX_ALLOCABLE_MEMORY
+#if SIZE_MAX > (1ULL << 34)
+#define WEBP_MAX_ALLOCABLE_MEMORY (1ULL << 34)
+#else
+// For 32-bit targets keep this below INT_MAX to avoid valgrind warnings.
+#define WEBP_MAX_ALLOCABLE_MEMORY ((1ULL << 31) - (1 << 16))
+#endif
+#endif  // WEBP_MAX_ALLOCABLE_MEMORY
 
 // size-checking safe malloc/calloc: verify that the requested size is not too
 // large, or return NULL. You don't need to call these for constructs like
 // malloc(sizeof(foo)), but only if there's picture-dependent size involved
 // somewhere (like: malloc(num_pixels * sizeof(*something))). That's why this
 // safe malloc() borrows the signature from calloc(), pointing at the dangerous
 // underlying multiply involved.
 WEBP_EXTERN(void*) WebPSafeMalloc(uint64_t nmemb, size_t size);
 // Note that WebPSafeCalloc() expects the second argument type to be 'size_t'
 // in order to favor the "calloc(num_foo, sizeof(foo))" pattern.
@@ skipping 127 matching lines @@
 WEBP_EXTERN(int) WebPGetColorPalette(const struct WebPPicture* const pic,
                                      uint32_t* const palette);
 
 //------------------------------------------------------------------------------
 
 #ifdef __cplusplus
 }    // extern "C"
 #endif
 
 #endif  /* WEBP_UTILS_UTILS_H_ */