69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_LIBDEXFILE_DEX_DEX_FILE_REFERENCE_H_
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#define ART_LIBDEXFILE_DEX_DEX_FILE_REFERENCE_H_
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#include <cstddef>
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#include <cstdint>
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#include <utility>
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namespace art {
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class DexFile;
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class DexFileReference {
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public:
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DexFileReference(const DexFile* file, uint32_t idx) : dex_file(file), index(idx) {}
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const DexFile* dex_file;
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uint32_t index;
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struct Comparator {
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bool operator()(const DexFileReference& a, const DexFileReference& b) const {
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if (a.dex_file != b.dex_file) {
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return a.dex_file < b.dex_file;
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}
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return a.index < b.index;
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}
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};
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};
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// Default comparators, compares the indices, not the backing data.
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inline bool operator<(const DexFileReference& a, const DexFileReference& b) {
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return DexFileReference::Comparator()(a, b);
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}
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inline bool operator==(const DexFileReference& a, const DexFileReference& b) {
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return a.dex_file == b.dex_file && a.index == b.index;
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}
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inline bool operator!=(const DexFileReference& a, const DexFileReference& b) {
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return !(a == b);
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}
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} // namespace art
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namespace std {
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// Hash implementation used for std::set/std::map. Simply xor the hash of the dex-file and index
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template <>
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struct hash<art::DexFileReference> {
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size_t operator()(const art::DexFileReference& ref) const {
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return hash<decltype(ref.dex_file)>()(ref.dex_file) ^
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hash<decltype(ref.index)>()(ref.index);
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}
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};
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} // namespace std
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#endif // ART_LIBDEXFILE_DEX_DEX_FILE_REFERENCE_H_
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