/* 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 #include #include class KeyValueParser; class OptionValue; enum OptionArgument { ArgumentNone, ArgumentRequired, ArgumentOptional, }; enum OptionType { OptionNone, OptionInteger, OptionString, OptionKeyValue, }; struct Option { int opt; OptionType type; const char *name; OptionArgument argument; const char *argumentName; const char *help; KeyValueParser *keyValueParser; bool hasShortOption() const { return isalnum(opt); } bool hasLongOption() const { return name != nullptr; } const char *typeName() const; }; template class OptionsBase { public: bool valid() const; bool isSet(const T &opt) const; const OptionValue &operator[](const T &opt) const; private: friend class KeyValueParser; friend class OptionsParser; bool parseValue(const T &opt, const Option &option, const char *value); void clear(); std::map values_; }; class KeyValueParser { public: class Options : public OptionsBase { }; bool addOption(const char *name, OptionType type, const char *help, OptionArgument argument = ArgumentNone); Options parse(const char *arguments); void usage(int indent); private: std::map optionsMap_; }; class OptionValue { public: OptionValue(); OptionValue(int value); OptionValue(const char *value); OptionValue(const std::string &value); OptionValue(const KeyValueParser::Options &value); OptionType type() const { return type_; } operator int() const; operator std::string() const; operator KeyValueParser::Options() const; int toInteger() const; std::string toString() const; KeyValueParser::Options toKeyValues() const; private: OptionType type_; int integer_; std::string string_; KeyValueParser::Options keyValues_; }; class OptionsParser { public: class Options : public OptionsBase { }; bool addOption(int opt, OptionType type, const char *help, const char *name = nullptr, OptionArgument argument = ArgumentNone, const char *argumentName = nullptr); bool addOption(int opt, KeyValueParser *parser, const char *help, const char *name = nullptr); Options parse(int argc, char *argv[]); void usage(); private: void parseValueError(const Option &option); std::list