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https://github.com/RGBCube/serenity
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d7126fbbc2
We need this for utilities like `env`, that do not gain anything by parsing the options passed to the command they are supposed to execute.
88 lines
3.4 KiB
C++
88 lines
3.4 KiB
C++
/*
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* Copyright (c) 2020, Sergey Bugaev <bugaevc@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/Function.h>
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <stdio.h>
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namespace Core {
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class ArgsParser {
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public:
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ArgsParser();
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enum class Required {
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Yes,
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No
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};
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enum class FailureBehavior {
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PrintUsageAndExit,
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PrintUsage,
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Exit,
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Ignore,
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};
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struct Option {
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bool requires_argument { true };
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const char* help_string { nullptr };
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const char* long_name { nullptr };
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char short_name { 0 };
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const char* value_name { nullptr };
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Function<bool(const char*)> accept_value;
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String name_for_display() const
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{
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if (long_name)
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return String::formatted("--{}", long_name);
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return String::formatted("-{:c}", short_name);
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}
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};
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struct Arg {
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const char* help_string { nullptr };
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const char* name { nullptr };
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int min_values { 0 };
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int max_values { 1 };
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Function<bool(const char*)> accept_value;
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};
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bool parse(int argc, char* const* argv, FailureBehavior failure_behavior = FailureBehavior::PrintUsageAndExit);
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// *Without* trailing newline!
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void set_general_help(const char* help_string) { m_general_help = help_string; };
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void set_stop_on_first_non_option(bool stop_on_first_non_option) { m_stop_on_first_non_option = stop_on_first_non_option; }
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void print_usage(FILE*, const char* argv0);
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void add_option(Option&&);
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void add_option(bool& value, const char* help_string, const char* long_name, char short_name);
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void add_option(const char*& value, const char* help_string, const char* long_name, char short_name, const char* value_name);
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void add_option(String& value, const char* help_string, const char* long_name, char short_name, const char* value_name);
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void add_option(StringView& value, char const* help_string, char const* long_name, char short_name, char const* value_name);
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void add_option(int& value, const char* help_string, const char* long_name, char short_name, const char* value_name);
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void add_option(double& value, const char* help_string, const char* long_name, char short_name, const char* value_name);
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void add_positional_argument(Arg&&);
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void add_positional_argument(const char*& value, const char* help_string, const char* name, Required required = Required::Yes);
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void add_positional_argument(String& value, const char* help_string, const char* name, Required required = Required::Yes);
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void add_positional_argument(StringView& value, char const* help_string, char const* name, Required required = Required::Yes);
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void add_positional_argument(int& value, const char* help_string, const char* name, Required required = Required::Yes);
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void add_positional_argument(double& value, const char* help_string, const char* name, Required required = Required::Yes);
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void add_positional_argument(Vector<const char*>& value, const char* help_string, const char* name, Required required = Required::Yes);
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void add_positional_argument(Vector<String>& value, const char* help_string, const char* name, Required required = Required::Yes);
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private:
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Vector<Option> m_options;
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Vector<Arg> m_positional_args;
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bool m_show_help { false };
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const char* m_general_help { nullptr };
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bool m_stop_on_first_non_option { false };
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};
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}
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