mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-14 22:56:12 -04:00
83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
// Copyright 2023 Google LLC
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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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// https://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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#include <sys/socket.h>
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#include <unistd.h>
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#include <array>
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#include <cerrno>
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#include <cstdint>
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#include "internal/platform/byte_array.h"
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#include "internal/platform/exception.h"
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#include "internal/platform/implementation/linux/stream.h"
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#include "internal/platform/logging.h"
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namespace nearby {
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namespace linux {
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ExceptionOr<ByteArray> InputStream::Read(std::int64_t size) {
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if (!fd_.isValid()) return {Exception::kIo};
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std::string buffer;
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buffer.resize(size);
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ssize_t ret = recv(fd_.get(), buffer.data(), buffer.size(), MSG_WAITALL);
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if (ret == 0) {
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return ExceptionOr(ByteArray());
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}
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if (ret < 0) {
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LOG(ERROR) << __func__
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<< ": error reading from fd: " << std::strerror(errno);
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return {Exception::kIo};
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}
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buffer.resize(ret);
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return ExceptionOr(ByteArray(std::move(buffer)));
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}
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Exception InputStream::Close() {
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if (!fd_.isValid()) return Exception{Exception::kIo};
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fd_.reset();
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return {};
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}
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Exception OutputStream::Write(const ByteArray &data) {
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if (!fd_.isValid()) return Exception{Exception::kIo};
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size_t written = 0;
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while (written < data.size()) {
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ssize_t ret = write(fd_.get(), data.data(), data.size());
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if (ret < 0) {
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LOG(ERROR) << __func__
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<< ": error writing to fd: " << std::strerror(errno);
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return Exception{Exception::kIo};
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}
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written += ret;
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}
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return Exception{Exception::kSuccess};
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}
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Exception OutputStream::Flush() { return Exception{Exception::kSuccess}; }
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Exception OutputStream::Close() {
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if (!fd_.isValid()) return Exception{Exception::kIo};
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auto ret = close(fd_.get()) < 0 ? Exception{Exception::kIo}
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: Exception{Exception::kSuccess};
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fd_.reset();
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return ret;
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}
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} // namespace linux
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} // namespace nearby
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