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101 lines
2.3 KiB
101 lines
2.3 KiB
/*
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* Copyright (C) 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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*/
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#include "io/StringStream.h"
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using ::android::StringPiece;
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namespace aapt {
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namespace io {
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StringInputStream::StringInputStream(const StringPiece& str) : str_(str), offset_(0u) {
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}
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bool StringInputStream::Next(const void** data, size_t* size) {
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if (offset_ == str_.size()) {
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return false;
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}
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*data = str_.data() + offset_;
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*size = str_.size() - offset_;
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offset_ = str_.size();
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return true;
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}
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void StringInputStream::BackUp(size_t count) {
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if (count > offset_) {
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offset_ = 0u;
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} else {
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offset_ -= count;
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}
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}
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size_t StringInputStream::ByteCount() const {
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return offset_;
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}
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size_t StringInputStream::TotalSize() const {
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return str_.size();
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}
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StringOutputStream::StringOutputStream(std::string* str, size_t buffer_capacity)
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: str_(str),
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buffer_capacity_(buffer_capacity),
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buffer_offset_(0u),
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buffer_(new char[buffer_capacity]) {
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}
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StringOutputStream::~StringOutputStream() {
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Flush();
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}
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bool StringOutputStream::Next(void** data, size_t* size) {
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if (buffer_offset_ == buffer_capacity_) {
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FlushImpl();
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}
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*data = buffer_.get() + buffer_offset_;
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*size = buffer_capacity_ - buffer_offset_;
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buffer_offset_ = buffer_capacity_;
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return true;
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}
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void StringOutputStream::BackUp(size_t count) {
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if (count > buffer_offset_) {
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buffer_offset_ = 0u;
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} else {
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buffer_offset_ -= count;
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}
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}
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size_t StringOutputStream::ByteCount() const {
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return str_->size() + buffer_offset_;
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}
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void StringOutputStream::Flush() {
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if (buffer_offset_ != 0u) {
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FlushImpl();
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}
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}
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void StringOutputStream::FlushImpl() {
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str_->append(buffer_.get(), buffer_offset_);
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buffer_offset_ = 0u;
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}
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} // namespace io
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} // namespace aapt
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