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66 lines
1.7 KiB
66 lines
1.7 KiB
// Copyright 2015 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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#include "android/base/files/MemStream.h"
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#include "android/base/files/StreamSerializing.h"
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#include <algorithm>
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#include <utility>
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namespace android {
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namespace base {
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MemStream::MemStream(int reserveSize) {
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mData.reserve(reserveSize);
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}
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MemStream::MemStream(Buffer&& data) : mData(std::move(data)) {}
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ssize_t MemStream::read(void* buffer, size_t size) {
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const auto sizeToRead = std::min<int>(size, readSize());
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memcpy(buffer, mData.data() + mReadPos, sizeToRead);
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mReadPos += sizeToRead;
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return sizeToRead;
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}
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ssize_t MemStream::write(const void* buffer, size_t size) {
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mData.insert(mData.end(), (const char*)buffer, (const char*)buffer + size);
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return size;
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}
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int MemStream::writtenSize() const {
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return (int)mData.size();
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}
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int MemStream::readPos() const {
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return mReadPos;
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}
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int MemStream::readSize() const {
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return mData.size() - mReadPos;
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}
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void MemStream::save(Stream* stream) const {
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saveBuffer(stream, mData);
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}
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void MemStream::load(Stream* stream) {
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loadBuffer(stream, &mData);
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mReadPos = 0;
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}
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} // namespace base
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} // namespace android
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