mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-14 22:56:12 -04:00
127 lines
3.3 KiB
C++
127 lines
3.3 KiB
C++
// Copyright 2025 Google LLC
|
|
//
|
|
// 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
|
|
//
|
|
// https://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 "internal/platform/stream_writer.h"
|
|
|
|
#include <cstdint>
|
|
#include <string>
|
|
|
|
#include "internal/platform/exception.h"
|
|
|
|
namespace nearby {
|
|
|
|
std::string StreamWriter::GetData() {
|
|
if (bits_used_ != 0) {
|
|
return buffer_ + std::string(1, bits_buffer_);
|
|
}
|
|
return buffer_;
|
|
}
|
|
|
|
Exception StreamWriter::WriteBits(uint8_t value, int bits) {
|
|
if (bits >= 8 || bits <= 0 || 8 - bits < bits_used_) {
|
|
return Exception{Exception::kInvalidProtocolBuffer};
|
|
}
|
|
|
|
bits_buffer_ |= (value & ((1 << bits) - 1)) << (8 - bits - bits_used_);
|
|
bits_used_ += bits;
|
|
|
|
if (bits_used_ == 8) {
|
|
buffer_.push_back(bits_buffer_);
|
|
bits_used_ = 0;
|
|
bits_buffer_ = 0;
|
|
}
|
|
|
|
return Exception{Exception::kSuccess};
|
|
}
|
|
|
|
Exception StreamWriter::WriteUint8(uint8_t value) {
|
|
if (bits_used_ != 0) {
|
|
return Exception{Exception::kInvalidProtocolBuffer};
|
|
}
|
|
|
|
buffer_.push_back(value);
|
|
return Exception{Exception::kSuccess};
|
|
}
|
|
|
|
Exception StreamWriter::WriteInt8(int8_t value) {
|
|
return WriteUint8(static_cast<uint8_t>(value));
|
|
}
|
|
|
|
Exception StreamWriter::WriteUint16(uint16_t value) {
|
|
if (bits_used_ != 0) {
|
|
return Exception{Exception::kInvalidProtocolBuffer};
|
|
}
|
|
|
|
char bytes[2];
|
|
bytes[0] = (value >> 8) & 0xff;
|
|
bytes[1] = value & 0xff;
|
|
buffer_.append(bytes, 2);
|
|
return Exception{Exception::kSuccess};
|
|
}
|
|
|
|
Exception StreamWriter::WriteInt16(int16_t value) {
|
|
return WriteUint16(static_cast<uint16_t>(value));
|
|
}
|
|
|
|
Exception StreamWriter::WriteUint32(uint32_t value) {
|
|
if (bits_used_ != 0) {
|
|
return Exception{Exception::kInvalidProtocolBuffer};
|
|
}
|
|
|
|
char bytes[4];
|
|
bytes[0] = (value >> 24) & 0xff;
|
|
bytes[1] = (value >> 16) & 0xff;
|
|
bytes[2] = (value >> 8) & 0xff;
|
|
bytes[3] = value & 0xff;
|
|
buffer_.append(bytes, 4);
|
|
return Exception{Exception::kSuccess};
|
|
}
|
|
|
|
Exception StreamWriter::WriteInt32(int32_t value) {
|
|
return WriteUint32(static_cast<uint32_t>(value));
|
|
}
|
|
|
|
Exception StreamWriter::WriteUint64(uint64_t value) {
|
|
if (bits_used_ != 0) {
|
|
return Exception{Exception::kInvalidProtocolBuffer};
|
|
}
|
|
|
|
char bytes[8];
|
|
bytes[0] = (value >> 56) & 0xff;
|
|
bytes[1] = (value >> 48) & 0xff;
|
|
bytes[2] = (value >> 40) & 0xff;
|
|
bytes[3] = (value >> 32) & 0xff;
|
|
bytes[4] = (value >> 24) & 0xff;
|
|
bytes[5] = (value >> 16) & 0xff;
|
|
bytes[6] = (value >> 8) & 0xff;
|
|
bytes[7] = value & 0xff;
|
|
buffer_.append(bytes, 8);
|
|
return Exception{Exception::kSuccess};
|
|
}
|
|
|
|
Exception StreamWriter::WriteInt64(int64_t value) {
|
|
return WriteUint64(static_cast<uint64_t>(value));
|
|
}
|
|
|
|
Exception StreamWriter::WriteBytes(const std::string& data) {
|
|
if (bits_used_ != 0) {
|
|
return Exception{Exception::kInvalidProtocolBuffer};
|
|
}
|
|
|
|
buffer_.append(data);
|
|
return Exception{Exception::kSuccess};
|
|
}
|
|
|
|
} // namespace nearby
|