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/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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 ART_LIBDEXFILE_DEX_DEX_FILE_REFERENCE_H_
#define ART_LIBDEXFILE_DEX_DEX_FILE_REFERENCE_H_
#include <cstddef>
#include <cstdint>
#include <utility>
namespace art {
class DexFile;
class DexFileReference {
public:
DexFileReference(const DexFile* file, uint32_t idx) : dex_file(file), index(idx) {}
const DexFile* dex_file;
uint32_t index;
struct Comparator {
bool operator()(const DexFileReference& a, const DexFileReference& b) const {
if (a.dex_file != b.dex_file) {
return a.dex_file < b.dex_file;
}
return a.index < b.index;
}
};
};
// Default comparators, compares the indices, not the backing data.
inline bool operator<(const DexFileReference& a, const DexFileReference& b) {
return DexFileReference::Comparator()(a, b);
}
inline bool operator==(const DexFileReference& a, const DexFileReference& b) {
return a.dex_file == b.dex_file && a.index == b.index;
}
inline bool operator!=(const DexFileReference& a, const DexFileReference& b) {
return !(a == b);
}
} // namespace art
namespace std {
// Hash implementation used for std::set/std::map. Simply xor the hash of the dex-file and index
template <>
struct hash<art::DexFileReference> {
size_t operator()(const art::DexFileReference& ref) const {
return hash<decltype(ref.dex_file)>()(ref.dex_file) ^
hash<decltype(ref.index)>()(ref.index);
}
};
} // namespace std
#endif // ART_LIBDEXFILE_DEX_DEX_FILE_REFERENCE_H_
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