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/*
* Copyright (c) 2020, Sergey Bugaev <bugaevc@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Function.h>
#include <AK/String.h>
#include <AK/Vector.h>
#include <stdio.h>
namespace Core {
class ArgsParser {
public:
ArgsParser();
enum class Required {
Yes,
No
};
enum class FailureBehavior {
PrintUsageAndExit,
PrintUsage,
Exit,
Ignore,
};
struct Option {
bool requires_argument { true };
const char* help_string { nullptr };
const char* long_name { nullptr };
char short_name { 0 };
const char* value_name { nullptr };
Function<bool(const char*)> accept_value;
String name_for_display() const
{
if (long_name)
return String::formatted("--{}", long_name);
return String::formatted("-{:c}", short_name);
}
};
struct Arg {
const char* help_string { nullptr };
const char* name { nullptr };
int min_values { 0 };
int max_values { 1 };
Function<bool(const char*)> accept_value;
};
bool parse(int argc, char* const* argv, FailureBehavior failure_behavior = FailureBehavior::PrintUsageAndExit);
// *Without* trailing newline!
void set_general_help(const char* help_string) { m_general_help = help_string; };
void set_stop_on_first_non_option(bool stop_on_first_non_option) { m_stop_on_first_non_option = stop_on_first_non_option; }
void print_usage(FILE*, const char* argv0);
void print_version(FILE*);
void add_option(Option&&);
void add_option(bool& value, const char* help_string, const char* long_name, char short_name);
void add_option(const char*& value, const char* help_string, const char* long_name, char short_name, const char* value_name);
void add_option(String& value, const char* help_string, const char* long_name, char short_name, const char* value_name);
void add_option(StringView& value, char const* help_string, char const* long_name, char short_name, char const* value_name);
void add_option(int& value, const char* help_string, const char* long_name, char short_name, const char* value_name);
void add_option(unsigned& value, const char* help_string, const char* long_name, char short_name, const char* value_name);
void add_option(double& value, const char* help_string, const char* long_name, char short_name, const char* value_name);
void add_positional_argument(Arg&&);
void add_positional_argument(const char*& value, const char* help_string, const char* name, Required required = Required::Yes);
void add_positional_argument(String& value, const char* help_string, const char* name, Required required = Required::Yes);
void add_positional_argument(StringView& value, char const* help_string, char const* name, Required required = Required::Yes);
void add_positional_argument(int& value, const char* help_string, const char* name, Required required = Required::Yes);
void add_positional_argument(unsigned& value, const char* help_string, const char* name, Required required = Required::Yes);
void add_positional_argument(double& value, const char* help_string, const char* name, Required required = Required::Yes);
void add_positional_argument(Vector<const char*>& value, const char* help_string, const char* name, Required required = Required::Yes);
void add_positional_argument(Vector<String>& value, const char* help_string, const char* name, Required required = Required::Yes);
private:
Vector<Option> m_options;
Vector<Arg> m_positional_args;
bool m_show_help { false };
bool m_show_version { false };
const char* m_general_help { nullptr };
bool m_stop_on_first_non_option { false };
};
}
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