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e2e7c4d574
In a bunch of cases, this actually ends up simplifying the code as
to_number will handle something such as:
```
Optional<I> opt;
if constexpr (IsSigned<I>)
opt = view.to_int<I>();
else
opt = view.to_uint<I>();
```
For us.
The main goal here however is to have a single generic number conversion
API between all of the String classes.
78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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* Copyright (c) 2023, Sam Atkins <atkinssj@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibCore/ArgsParser.h>
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#include <LibMain/Main.h>
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#include <string.h>
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Array<StringView, EMAXERRNO + 1> s_errno_names = {
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#define __ENUMERATE_ERRNO_CODE(c, s) #c##sv,
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ENUMERATE_ERRNO_CODES(__ENUMERATE_ERRNO_CODE)
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#undef __ENUMERATE_ERRNO_CODE
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};
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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bool list = false;
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bool search = false;
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StringView keyword;
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Core::ArgsParser args_parser;
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args_parser.add_positional_argument(keyword, "Error number or name to look up", "keyword", Core::ArgsParser::Required::No);
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args_parser.add_option(list, "List all errno values", "list", 'l');
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args_parser.add_option(search, "Search for error descriptions containing keyword", "search", 's');
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args_parser.parse(arguments);
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auto max_name_length = 0;
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for (int i = 0; i < sys_nerr; i++) {
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max_name_length = max(max_name_length, s_errno_names[i].length());
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}
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auto output_errno_description = [max_name_length](int errno_code, auto error_string) {
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outln("{:{}} {:>2} {}", s_errno_names[errno_code], max_name_length, errno_code, error_string);
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};
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if (list) {
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for (int i = 0; i < sys_nerr; i++)
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output_errno_description(i, strerror(i));
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return 0;
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}
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if (keyword.is_empty())
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return 0;
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if (search) {
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for (int i = 0; i < sys_nerr; i++) {
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auto error_string = strerror(i);
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StringView error { error_string, strlen(error_string) };
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if (error.contains(keyword, CaseSensitivity::CaseInsensitive))
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output_errno_description(i, error);
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}
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return 0;
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}
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if (auto maybe_error_code = keyword.to_number<int>(); maybe_error_code.has_value()) {
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auto error_code = maybe_error_code.value();
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auto error = strerror(error_code);
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if (error == "Unknown error"sv) {
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warnln("ERROR: Unknown errno: {}", keyword);
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return 1;
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}
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output_errno_description(error_code, error);
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return 0;
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}
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for (int i = 0; i < sys_nerr; i++) {
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if (keyword.equals_ignoring_ascii_case(s_errno_names[i])) {
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output_errno_description(i, strerror(i));
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return 0;
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}
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}
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warnln("ERROR: Not understood: {}", keyword);
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return 1;
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}
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