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70 lines
1.9 KiB
70 lines
1.9 KiB
4 months ago
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/*
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* Copyright (C) 2013 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_LIBELFFILE_STREAM_VECTOR_OUTPUT_STREAM_H_
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#define ART_LIBELFFILE_STREAM_VECTOR_OUTPUT_STREAM_H_
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#include "output_stream.h"
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#include <string.h>
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#include <string>
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#include <vector>
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namespace art {
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class VectorOutputStream final : public OutputStream {
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public:
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VectorOutputStream(const std::string& location, std::vector<uint8_t>* vector);
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~VectorOutputStream() override {}
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bool WriteFully(const void* buffer, size_t byte_count) override {
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if (static_cast<size_t>(offset_) == vector_->size()) {
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const uint8_t* start = reinterpret_cast<const uint8_t*>(buffer);
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vector_->insert(vector_->end(), &start[0], &start[byte_count]);
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offset_ += byte_count;
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} else {
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off_t new_offset = offset_ + byte_count;
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EnsureCapacity(new_offset);
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memcpy(&(*vector_)[offset_], buffer, byte_count);
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offset_ = new_offset;
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}
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return true;
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}
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off_t Seek(off_t offset, Whence whence) override;
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bool Flush() override {
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return true;
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}
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private:
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void EnsureCapacity(off_t new_offset) {
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if (new_offset > static_cast<off_t>(vector_->size())) {
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vector_->resize(new_offset);
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}
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}
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off_t offset_;
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std::vector<uint8_t>* const vector_;
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DISALLOW_COPY_AND_ASSIGN(VectorOutputStream);
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};
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} // namespace art
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#endif // ART_LIBELFFILE_STREAM_VECTOR_OUTPUT_STREAM_H_
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