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mapped_byte_buffer.cpp
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65 lines (53 loc) · 2.12 KB
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/* vim:set ts=2 sw=2 sts=2 et: */
/**
* \author Marcus Holland-Moritz (github@mhxnet.de)
* \copyright Copyright (c) Marcus Holland-Moritz
*
* This file is part of dwarfs.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the “Software”), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* SPDX-License-Identifier: MIT
*/
#include <dwarfs/file_view.h>
#include <dwarfs/mapped_byte_buffer.h>
namespace dwarfs {
namespace {
class mapped_byte_buffer_impl : public byte_buffer_interface {
public:
mapped_byte_buffer_impl(std::span<uint8_t const> data, file_view const& mm)
: data_{data}
, mm_{mm} {}
size_t size() const override { return data_.size(); }
size_t capacity() const override { return data_.size(); }
uint8_t const* data() const override { return data_.data(); }
std::span<uint8_t const> span() const override {
return {data_.data(), data_.size()};
}
private:
std::span<uint8_t const> data_;
file_view mm_;
};
} // namespace
shared_byte_buffer
mapped_byte_buffer::create(std::span<uint8_t const> data, file_view const& mm) {
return shared_byte_buffer{
std::make_shared<mapped_byte_buffer_impl>(data, mm)};
}
} // namespace dwarfs