javascript_library_identification.h

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/*
 * Copyright 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http:///www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef NET_INSTAWEB_REWRITER_PUBLIC_JAVASCRIPT_LIBRARY_IDENTIFICATION_H_
#define NET_INSTAWEB_REWRITER_PUBLIC_JAVASCRIPT_LIBRARY_IDENTIFICATION_H_

#include <map>

#include "pagespeed/kernel/base/basictypes.h"
#include "pagespeed/kernel/base/string.h"
#include "pagespeed/kernel/base/string_util.h"

namespace net_instaweb {

class JavascriptLibraryIdentification {
 public:
  typedef uint64 SizeInBytes;

  static const int kNumHashChars = (126 + 5) / 6; 

  JavascriptLibraryIdentification() { }
  ~JavascriptLibraryIdentification();

  bool empty() const { return libraries_.empty(); }

  bool RegisterLibrary(
      SizeInBytes bytes, StringPiece md5_hash, StringPiece canonical_url);
  StringPiece Find(StringPiece minified_code) const;
  void Merge(const JavascriptLibraryIdentification& src);
  void AppendSignature(GoogleString* signature) const;

 private:
  class LibraryInfo;
  typedef GoogleString MD5Signature;
  typedef std::map<MD5Signature, GoogleString> MD5ToUrlMap;
  typedef std::map<SizeInBytes, MD5ToUrlMap> LibraryMap;

  LibraryMap libraries_;

};

}  

#endif