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118 lines
3.6 KiB
118 lines
3.6 KiB
// Copyright 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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#pragma once
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#include "android/base/containers/SmallVector.h"
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#include "android/base/files/MemStream.h"
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#include "android/base/files/Stream.h"
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#include "android/base/TypeTraits.h"
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#include <string>
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#include <vector>
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namespace android {
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namespace base {
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//
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// Save/load operations for different types.
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//
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void saveStream(Stream* stream, const MemStream& memStream);
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void loadStream(Stream* stream, MemStream* memStream);
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void saveBufferRaw(Stream* stream, char* buffer, uint32_t len);
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bool loadBufferRaw(Stream* stream, char* buffer);
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template <class T, class = enable_if<std::is_standard_layout<T>>>
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void saveBuffer(Stream* stream, const std::vector<T>& buffer) {
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stream->putBe32(buffer.size());
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stream->write(buffer.data(), sizeof(T) * buffer.size());
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}
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template <class T, class = enable_if<std::is_standard_layout<T>>>
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bool loadBuffer(Stream* stream, std::vector<T>* buffer) {
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auto len = stream->getBe32();
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buffer->resize(len);
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auto ret = static_cast<std::size_t>(stream->read(buffer->data(), len * sizeof(T)));
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return ret == len * sizeof(T);
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}
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template <class T, class = enable_if<std::is_standard_layout<T>>>
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void saveBuffer(Stream* stream, const SmallVector<T>& buffer) {
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stream->putBe32(buffer.size());
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stream->write(buffer.data(), sizeof(T) * buffer.size());
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}
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template <class T, class = enable_if<std::is_standard_layout<T>>>
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bool loadBuffer(Stream* stream, SmallVector<T>* buffer) {
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auto len = stream->getBe32();
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buffer->clear();
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buffer->resize_noinit(len);
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int ret = (int)stream->read(buffer->data(), len * sizeof(T));
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return ret == len * sizeof(T);
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}
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template <class T, class SaveFunc>
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void saveBuffer(Stream* stream, const std::vector<T>& buffer, SaveFunc&& saver) {
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stream->putBe32(buffer.size());
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for (const auto& val : buffer) {
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saver(stream, val);
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}
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}
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template <class T>
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void saveBuffer(Stream* stream, const T* buffer, size_t numElts) {
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stream->putBe32(numElts);
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stream->write(buffer, sizeof(T) * numElts);
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}
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template <class T>
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void loadBufferPtr(Stream* stream, T* out) {
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auto len = stream->getBe32();
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stream->read(out, len * sizeof(T));
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}
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template <class T, class LoadFunc>
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void loadBuffer(Stream* stream, std::vector<T>* buffer, LoadFunc&& loader) {
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auto len = stream->getBe32();
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buffer->clear();
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buffer->reserve(len);
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for (uint32_t i = 0; i < len; i++) {
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buffer->emplace_back(loader(stream));
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}
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}
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template <class Collection, class SaveFunc>
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void saveCollection(Stream* stream, const Collection& c, SaveFunc&& saver) {
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stream->putBe32(c.size());
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for (const auto& val : c) {
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saver(stream, val);
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}
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}
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template <class Collection, class LoadFunc>
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void loadCollection(Stream* stream, Collection* c, LoadFunc&& loader) {
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const int size = stream->getBe32();
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for (int i = 0; i < size; ++i) {
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c->emplace(loader(stream));
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}
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}
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void saveStringArray(Stream* stream, const char* const* strings, uint32_t count);
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std::vector<std::string> loadStringArray(Stream* stream);
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} // namespace base
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} // namespace android
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