mirror of
https://github.com/LSPosed/DexBuilder.git
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51 lines
1.3 KiB
C++
51 lines
1.3 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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#pragma once
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#include "common.h"
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#include "dex_format.h"
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#include <vector>
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namespace ir {
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// A simple index tracking and allocator
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class IndexMap {
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public:
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dex::u4 AllocateIndex() {
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const auto size = indexes_map_.size();
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while (alloc_pos_ < size && indexes_map_[alloc_pos_]) {
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++alloc_pos_;
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}
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MarkUsedIndex(alloc_pos_);
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return alloc_pos_++;
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}
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void MarkUsedIndex(dex::u4 index) {
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if (index >= indexes_map_.size()) {
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indexes_map_.resize(index + 1);
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}
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SLICER_CHECK(!indexes_map_[index]);
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indexes_map_[index] = true;
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}
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private:
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std::vector<bool> indexes_map_;
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dex::u4 alloc_pos_ = 0;
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};
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} // namespace ir
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