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/*
* Copyright (C) 2022 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.
*/
#pragma once
#include <cerrno>
#include <cstddef>
#include <cstdint>
#include <memory>
#include <string>
#include "common.h"
namespace screensharing {
// An output stream that uses the unsigned little endian base 128 (<a xref="https://en.wikipedia.org/wiki/LEB128">LEB128</a>)
// variable-length encoding for integer values.
// See Base128InputStream.
class Base128OutputStream {
public:
Base128OutputStream(int fd, size_t buffer_size);
~Base128OutputStream();
int Close();
void Flush();
void WriteByte(uint8_t byte);
void WriteBytes(const std::string& bytes);
void WriteUInt16(uint16_t value);
void WriteInt16(int16_t value) { WriteUInt16(value); }
void WriteUInt32(uint32_t value);
void WriteInt32(int32_t value) { WriteUInt32(value); }
void WriteUInt64(uint64_t value);
void WriteInt64(int64_t value) { WriteUInt64(value); }
void WriteBool(bool value);
private:
int fd_;
uint8_t* buffer_;
size_t buffer_capacity_;
size_t offset_;
size_t data_end_;
DISALLOW_COPY_AND_ASSIGN(Base128OutputStream);
};
} // namespace screensharing
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