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/*
* Copyright (C) 2013 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.
*/
#include "buffered_output_stream.h"
#include <string.h>
namespace art {
BufferedOutputStream::BufferedOutputStream(OutputStream* out)
: OutputStream(out->GetLocation()), out_(out), used_(0) {}
bool BufferedOutputStream::WriteFully(const void* buffer, size_t byte_count) {
if (byte_count > kBufferSize) {
Flush();
return out_->WriteFully(buffer, byte_count);
}
if (used_ + byte_count > kBufferSize) {
bool success = Flush();
if (!success) {
return false;
}
}
const uint8_t* src = reinterpret_cast<const uint8_t*>(buffer);
memcpy(&buffer_[used_], src, byte_count);
used_ += byte_count;
return true;
}
bool BufferedOutputStream::Flush() {
bool success = true;
if (used_ > 0) {
success = out_->WriteFully(&buffer_[0], used_);
used_ = 0;
}
return success;
}
off_t BufferedOutputStream::Seek(off_t offset, Whence whence) {
if (!Flush()) {
return -1;
}
return out_->Seek(offset, whence);
}
} // namespace art
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