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// 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 <string.h>
#ifdef _MSC_VER
#include <hash_map>
using stdext::hash_map;
#else
#include <ext/hash_map>
using __gnu_cxx::hash_map;
namespace __gnu_cxx {
template<>
struct hash<std::string> {
size_t operator()(const std::string& s) const {
return hash<const char*>()(s.c_str());
}
};
}
#endif
/// Equality binary predicate for const char*.
struct ExternalStringEq {
bool operator()(const char* a, const char* b) {
return strcmp(a, b) == 0;
}
};
/// Hash functor for const char*.
struct ExternalStringHash {
size_t operator()(const char* key) const {
#ifdef _MSC_VER
return stdext::hash<const char*>()(key);
#else
return __gnu_cxx::hash<const char*>()(key);
#endif
}
};
/// A template for hash_maps keyed by a const char* that is maintained within
/// the values. Use like:
/// ExternalStringHash<Foo*>::Type foos;
/// to make foos into a hash mapping const char* => Foo*.
template<typename V>
struct ExternalStringHashMap {
typedef hash_map<const char*, V, ExternalStringHash, ExternalStringEq> Type;
};
#endif // NINJA_MAP_H_
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