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https://fuchsia.googlesource.com/third_party/pigweed.googlesource.com/pigweed/pigweed
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759ff77d81
Adds WriteLine() to pw_dumb_io, and updates all function names to use read/write. Change-Id: I0c3358fa264f9a5e7c8b49736e960015df0e67fc
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
// Copyright 2019 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy
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// 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, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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#include "pw_dumb_io/dumb_io.h"
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#include <cstdio>
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namespace pw::dumb_io {
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Status ReadByte(std::byte* dest) {
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if (dest == nullptr) {
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return Status::FAILED_PRECONDITION;
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}
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int value = std::getchar();
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if (value == EOF) {
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return Status::RESOURCE_EXHAUSTED;
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}
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*dest = static_cast<std::byte>(value);
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return Status::OK;
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}
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Status WriteByte(std::byte b) {
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if (std::putchar(static_cast<char>(b)) == EOF) {
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return Status::INTERNAL;
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}
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return Status::OK;
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}
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StatusWithSize WriteLine(const std::string_view& s) {
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size_t chars_written = 0;
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StatusWithSize size_result = WriteBytes(as_bytes(span(s)));
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if (!size_result.ok()) {
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return size_result;
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}
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chars_written += size_result.size();
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// Write trailing newline character.
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Status result = WriteByte(static_cast<std::byte>('\n'));
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if (result.ok()) {
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chars_written++;
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}
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return StatusWithSize(result, chars_written);
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}
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} // namespace pw::dumb_io
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