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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2019, Google Inc.
*
* options.h - cam - Options parsing
*/
#ifndef __CAM_OPTIONS_H__
#define __CAM_OPTIONS_H__
#include <ctype.h>
#include <list>
#include <map>
enum OptionArgument {
ArgumentNone,
ArgumentRequired,
ArgumentOptional,
};
enum OptionType {
OptionNone,
OptionInteger,
OptionString,
};
struct Option {
int opt;
OptionType type;
const char *name;
OptionArgument argument;
const char *argumentName;
const char *help;
bool hasShortOption() const { return isalnum(opt); }
bool hasLongOption() const { return name != nullptr; }
const char *typeName() const;
};
class OptionValue;
template <typename T>
class OptionsBase
{
public:
bool valid() const;
bool isSet(const T &opt) const;
const OptionValue &operator[](const T &opt) const;
private:
friend class OptionsParser;
bool parseValue(const T &opt, const Option &option, const char *value);
void clear();
std::map<T, OptionValue> values_;
};
class OptionValue
{
public:
OptionValue();
OptionValue(int value);
OptionValue(const char *value);
OptionValue(const std::string &value);
OptionType type() const { return type_; }
operator int() const;
operator std::string() const;
private:
OptionType type_;
int integer_;
std::string string_;
};
class OptionsParser
{
public:
class Options : public OptionsBase<int>
{
};
bool addOption(int opt, OptionType type, const char *help,
const char *name = nullptr,
OptionArgument argument = ArgumentNone,
const char *argumentName = nullptr);
Options parse(int argc, char *argv[]);
void usage();
private:
void parseValueError(const Option &option);
std::list<Option> options_;
std::map<unsigned int, Option *> optionsMap_;
};
#endif /* __CAM_OPTIONS_H__ */
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