Don't preload rarely seen large images
[chromium-blink-merge.git] / base / hash.h
blobe46f6ac24842d3ddb2d8263ae2a2f8f3c8164834
1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef BASE_HASH_H_
6 #define BASE_HASH_H_
8 #include <limits>
9 #include <string>
11 #include "base/base_export.h"
12 #include "base/basictypes.h"
13 #include "base/logging.h"
15 namespace base {
17 // WARNING: This hash function should not be used for any cryptographic purpose.
18 BASE_EXPORT uint32 SuperFastHash(const char* data, int len);
20 // Computes a hash of a memory buffer |data| of a given |length|.
21 // WARNING: This hash function should not be used for any cryptographic purpose.
22 inline uint32 Hash(const char* data, size_t length) {
23 if (length > static_cast<size_t>(std::numeric_limits<int>::max())) {
24 NOTREACHED();
25 return 0;
27 return SuperFastHash(data, static_cast<int>(length));
30 // Computes a hash of a string |str|.
31 // WARNING: This hash function should not be used for any cryptographic purpose.
32 inline uint32 Hash(const std::string& str) {
33 return Hash(str.data(), str.size());
36 } // namespace base
38 #endif // BASE_HASH_H_