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If USING_AK_GLOBALLY is not defined, the name IsLvalueReference might not be available in the global namespace. Follow the pattern established in LibTest to fully qualify AK types in macros to avoid this problem.
77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
/*
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* Copyright (c) 2021, kleines Filmröllchen <filmroellchen@serenityos.org>.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/DeprecatedFlyString.h>
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#include <AK/Error.h>
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#include <errno.h>
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namespace Audio {
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struct LoaderError {
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enum class Category : u32 {
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// The error category is unknown.
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Unknown = 0,
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IO,
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// The read file doesn't follow the file format.
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Format,
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// Equivalent to an ASSERT(), except non-crashing.
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Internal,
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// The loader encountered something in the format that is not yet implemented.
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Unimplemented,
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};
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Category category { Category::Unknown };
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// Binary index: where in the file the error occurred.
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size_t index { 0 };
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DeprecatedFlyString description { DeprecatedString::empty() };
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constexpr LoaderError() = default;
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LoaderError(Category category, size_t index, DeprecatedFlyString description)
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: category(category)
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, index(index)
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, description(move(description))
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{
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}
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LoaderError(DeprecatedFlyString description)
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: description(move(description))
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{
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}
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LoaderError(Category category, DeprecatedFlyString description)
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: category(category)
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, description(move(description))
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{
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}
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LoaderError(LoaderError&) = default;
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LoaderError(LoaderError&&) = default;
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LoaderError(Error&& error)
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{
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if (error.is_errno()) {
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auto code = error.code();
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description = DeprecatedString::formatted("{} ({})", strerror(code), code);
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if (code == EBADF || code == EBUSY || code == EEXIST || code == EIO || code == EISDIR || code == ENOENT || code == ENOMEM || code == EPIPE)
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category = Category::IO;
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} else {
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description = error.string_literal();
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}
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}
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};
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}
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// Convenience TRY-like macro to convert an Error to a LoaderError
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#define LOADER_TRY(expression) \
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({ \
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auto _temporary_result = (expression); \
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if (_temporary_result.is_error()) \
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return LoaderError(_temporary_result.release_error()); \
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static_assert(!::AK::Detail::IsLvalueReference<decltype(_temporary_result.release_value())>, \
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"Do not return a reference from a fallible expression"); \
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_temporary_result.release_value(); \
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})
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