Add FLAC to trunk/deps/third_party/....

flac/src/libFLAC/alloc.c

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <limits.h>
+#if !defined _MSC_VER
+#include <stdint.h>
+#endif
+#include <stdlib.h>
+#include "share/alloc.h"
+
+void *safe_malloc_(size_t size) {
+  return malloc(size ? size : 1);
+}
+
+void *safe_calloc_(size_t num_items, size_t size) {
+  if (num_items && size)
+    return calloc(num_items, size);
+  return malloc(1);
+}
+
+void *safe_malloc_add_2op_(size_t size1, size_t size2) {
+  size_t size = size1 + size2;
+  if (size < size1)
+    return NULL;
+
+  return safe_malloc_(size);
+}
+
+void *safe_malloc_mul_2op_(size_t size1, size_t size2) {
+  if (!size1 || !size2)
+    return malloc(1);
+
+  if (size1 > SIZE_MAX / size2)
+    return NULL;
+
+  return malloc(size1 * size2);
+}
+
+void *safe_malloc_muladd2_(size_t size1, size_t size2, size_t size3) {
+  size_t size = size2 + size3;
+  if (size < size3)
+    return 0;
+
+  if (!size1 || !size)
+    return malloc(1);
+
+  return safe_malloc_mul_2op_(size1, size2);
+}
+
+void *safe_realloc_mul_2op_(void *ptr, size_t size1, size_t size2) {
+  if (!size1 || !size2)
+    return realloc(ptr, 0);
+
+  if (size1 > SIZE_MAX / size2)
+    return 0;
+
+  return realloc(ptr, size1 * size2);
+}