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71 lines
1.8 KiB
71 lines
1.8 KiB
/*
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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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#include "buffered_output_stream.h"
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#include <string.h>
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namespace art {
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BufferedOutputStream::BufferedOutputStream(std::unique_ptr<OutputStream> out)
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: OutputStream(out->GetLocation()), // Before out is moved to out_.
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out_(std::move(out)),
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used_(0) {}
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BufferedOutputStream::~BufferedOutputStream() {
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FlushBuffer();
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}
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bool BufferedOutputStream::WriteFully(const void* buffer, size_t byte_count) {
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if (byte_count > kBufferSize) {
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if (!FlushBuffer()) {
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return false;
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}
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return out_->WriteFully(buffer, byte_count);
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}
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if (used_ + byte_count > kBufferSize) {
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if (!FlushBuffer()) {
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return false;
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}
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}
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const uint8_t* src = reinterpret_cast<const uint8_t*>(buffer);
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memcpy(&buffer_[used_], src, byte_count);
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used_ += byte_count;
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return true;
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}
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bool BufferedOutputStream::Flush() {
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return FlushBuffer() && out_->Flush();
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}
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bool BufferedOutputStream::FlushBuffer() {
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bool success = true;
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if (used_ > 0) {
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success = out_->WriteFully(&buffer_[0], used_);
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used_ = 0;
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}
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return success;
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}
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off_t BufferedOutputStream::Seek(off_t offset, Whence whence) {
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if (!FlushBuffer()) {
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return -1;
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}
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return out_->Seek(offset, whence);
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}
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} // namespace art
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