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/*
* Copyright (C) 2017 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 "io/BigBufferStream.h"
namespace aapt {
namespace io {
//
// BigBufferInputStream
//
bool BigBufferInputStream::Next(const void** data, size_t* size) {
if (iter_ == buffer_->end()) {
return false;
}
if (offset_ == iter_->size) {
++iter_;
if (iter_ == buffer_->end()) {
return false;
}
offset_ = 0;
}
*data = iter_->buffer.get() + offset_;
*size = iter_->size - offset_;
bytes_read_ += iter_->size - offset_;
offset_ = iter_->size;
return true;
}
void BigBufferInputStream::BackUp(size_t count) {
if (count > offset_) {
bytes_read_ -= offset_;
offset_ = 0;
} else {
offset_ -= count;
bytes_read_ -= count;
}
}
bool BigBufferInputStream::CanRewind() const {
return true;
}
bool BigBufferInputStream::Rewind() {
iter_ = buffer_->begin();
offset_ = 0;
bytes_read_ = 0;
return true;
}
size_t BigBufferInputStream::ByteCount() const {
return bytes_read_;
}
bool BigBufferInputStream::HadError() const {
return false;
}
size_t BigBufferInputStream::TotalSize() const {
return buffer_->size();
}
//
// BigBufferOutputStream
//
bool BigBufferOutputStream::Next(void** data, size_t* size) {
*data = buffer_->NextBlock(size);
return true;
}
void BigBufferOutputStream::BackUp(size_t count) {
buffer_->BackUp(count);
}
size_t BigBufferOutputStream::ByteCount() const {
return buffer_->size();
}
bool BigBufferOutputStream::HadError() const {
return false;
}
} // namespace io
} // namespace aapt
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