// Copyright 2011 Google Inc. All Rights Reserved.

//

// 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 NINJA_MAP_H_

#define NINJA_MAP_H_

#include <algorithm>

#include <string.h>

#include "string_piece.h"

#include "util.h"

#include "third_party/emhash/hash_table8.hpp"

#include "third_party/rapidhash/rapidhash.h"

namespace std {

template<>

struct hash<StringPiece> {

  typedef StringPiece argument_type;

  typedef size_t result_type;

  size_t operator()(StringPiece key) const {

    return rapidhash(key.str_, key.len_);

  }

};

}

/// A template for hash_maps keyed by a StringPiece whose string is

/// owned externally (typically by the values).  Use like:

/// ExternalStringHash<Foo*>::Type foos; to make foos into a hash

/// mapping StringPiece => Foo*.

template<typename V>

struct ExternalStringHashMap {

  typedef emhash8::HashMap<StringPiece, V> Type;

};

#endif // NINJA_MAP_H_