Niklas Söderlund
3f906920e4
Add a flag to indicate if an option can be repeatable. If an option is repeatable it must be accessed thru the array interface, even if it's only specified once by the user. Also update the usage generator to indicate which options are repeatable. Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
145 lines
2.8 KiB
C++
145 lines
2.8 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2019, Google Inc.
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*
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* options.h - cam - Options parsing
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*/
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#ifndef __CAM_OPTIONS_H__
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#define __CAM_OPTIONS_H__
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#include <ctype.h>
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#include <list>
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#include <map>
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#include <vector>
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class KeyValueParser;
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class OptionValue;
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enum OptionArgument {
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ArgumentNone,
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ArgumentRequired,
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ArgumentOptional,
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};
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enum OptionType {
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OptionNone,
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OptionInteger,
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OptionString,
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OptionKeyValue,
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};
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struct Option {
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int opt;
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OptionType type;
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const char *name;
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OptionArgument argument;
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const char *argumentName;
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const char *help;
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KeyValueParser *keyValueParser;
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bool isArray;
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bool hasShortOption() const { return isalnum(opt); }
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bool hasLongOption() const { return name != nullptr; }
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const char *typeName() const;
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};
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template<typename T>
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class OptionsBase
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{
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public:
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bool valid() const;
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bool isSet(const T &opt) const;
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const OptionValue &operator[](const T &opt) const;
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private:
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friend class KeyValueParser;
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friend class OptionsParser;
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bool parseValue(const T &opt, const Option &option, const char *value);
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void clear();
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std::map<T, OptionValue> values_;
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};
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class KeyValueParser
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{
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public:
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class Options : public OptionsBase<std::string>
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{
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};
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bool addOption(const char *name, OptionType type, const char *help,
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OptionArgument argument = ArgumentNone);
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Options parse(const char *arguments);
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void usage(int indent);
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private:
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std::map<std::string, Option> optionsMap_;
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};
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class OptionValue
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{
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public:
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enum ValueType {
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ValueNone,
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ValueInteger,
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ValueString,
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ValueKeyValue,
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ValueArray,
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};
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OptionValue();
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OptionValue(int value);
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OptionValue(const char *value);
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OptionValue(const std::string &value);
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OptionValue(const KeyValueParser::Options &value);
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void addValue(const OptionValue &value);
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ValueType type() const { return type_; }
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operator int() const;
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operator std::string() const;
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operator KeyValueParser::Options() const;
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operator std::vector<OptionValue>() const;
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int toInteger() const;
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std::string toString() const;
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KeyValueParser::Options toKeyValues() const;
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std::vector<OptionValue> toArray() const;
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private:
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ValueType type_;
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int integer_;
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std::string string_;
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KeyValueParser::Options keyValues_;
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std::vector<OptionValue> array_;
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};
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class OptionsParser
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{
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public:
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class Options : public OptionsBase<int>
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{
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};
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bool addOption(int opt, OptionType type, const char *help,
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const char *name = nullptr,
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OptionArgument argument = ArgumentNone,
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const char *argumentName = nullptr, bool array = false);
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bool addOption(int opt, KeyValueParser *parser, const char *help,
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const char *name = nullptr, bool array = false);
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Options parse(int argc, char *argv[]);
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void usage();
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private:
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void parseValueError(const Option &option);
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std::list<Option> options_;
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std::map<unsigned int, Option *> optionsMap_;
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};
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#endif /* __CAM_OPTIONS_H__ */
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