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AK: Add AK::OSError, a wrapper for errno codes

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This is a strongly typed carrier for "errno" error codes, intended for
use in return types, e.g Result<String, OSError>.
This commit is contained in:
Andreas Kling 2021-01-10 13:46:17 +01:00
parent a330f37f06
commit a8681da4bf
1 changed files with 58 additions and 0 deletions
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AK/OSError.h Normal file
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/*
* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/Format.h>
#include <string.h>
namespace AK {
class OSError {
public:
explicit OSError(int error)
: m_error(error)
{
}
int error() const { return m_error; }
const char* string() const { return strerror(m_error); }
private:
int m_error { 0 };
};
template<>
struct Formatter<OSError> : Formatter<StringView> {
void format(FormatBuilder& builder, const OSError& value)
{
Formatter<StringView>::format(builder, value.string());
}
};
}
using AK::OSError;