Page Speed Optimization Libraries
1.3.25.1
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00001 /* 00002 * Copyright 2010 Google Inc. 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http:///www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00020 00021 #ifndef NET_INSTAWEB_UTIL_PUBLIC_HASHER_H_ 00022 #define NET_INSTAWEB_UTIL_PUBLIC_HASHER_H_ 00023 00024 #include "net/instaweb/util/public/basictypes.h" 00025 #include "net/instaweb/util/public/string.h" 00026 #include "net/instaweb/util/public/string_util.h" 00027 00028 namespace net_instaweb { 00029 00030 class Hasher { 00031 public: 00034 explicit Hasher(int max_chars); 00035 virtual ~Hasher(); 00036 00042 GoogleString Hash(const StringPiece& content) const; 00043 00049 int HashSizeInChars() const; 00050 00052 uint64 HashToUint64(const StringPiece& content) const; 00053 00057 virtual GoogleString RawHash(const StringPiece& content) const = 0; 00058 00060 virtual int RawHashSizeInBytes() const = 0; 00061 00062 private: 00063 int max_chars_; 00064 00065 DISALLOW_COPY_AND_ASSIGN(Hasher); 00066 }; 00067 00068 } 00069 00070 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_HASHER_H_