summaryrefslogtreecommitdiff
path: root/src/cam/options.h
blob: 01a5d36a63fbdb385939ef81c3b600c6f15e9acd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
/* 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>
#include <vector>

class KeyValueParser;
class OptionValue;
struct Option;

enum OptionArgument {
	ArgumentNone,
	ArgumentRequired,
	ArgumentOptional,
};

enum OptionType {
	OptionNone,
	OptionInteger,
	OptionString,
	OptionKeyValue,
};

template<typename T>
class OptionsBase
{
public:
	OptionsBase() : valid_(false) {}

	bool empty() const;
	bool valid() const;
	bool isSet(const T &opt) const;
	const OptionValue &operator[](const T &opt) const;

	void invalidate();

private:
	friend class KeyValueParser;
	friend class OptionsParser;

	bool parseValue(const T &opt, const Option &option, const char *value);

	std::map<T, OptionValue> values_;
	bool valid_;
};

class KeyValueParser
{
public:
	class Options : public OptionsBase<std::string>
	{
	};

	KeyValueParser();
	virtual ~KeyValueParser();

	bool addOption(const char *name, OptionType type, const char *help,
		       OptionArgument argument = ArgumentNone);

	virtual Options parse(const char *arguments);

private:
	friend class OptionsParser;
	void usage(int indent);

	std::map<std::string, Option> optionsMap_;
};

class OptionsParser
{
public:
	class Options : public OptionsBase<int>
	{
	};

	OptionsParser();
	~OptionsParser();

	bool addOption(int opt, OptionType type, const char *help,
		       const char *name = nullptr,
		       OptionArgument argument = ArgumentNone,
		       const char *argumentName = nullptr, bool array = false);
	bool addOption(int opt, KeyValueParser *parser, const char *help,
		       const char *name = nullptr, bool array = false);

	Options parse(int argc, char *argv[]);
	void usage();

private:
	void usageOptions(const std::list<Option> &options, unsigned int indent);

	std::list<Option> options_;
	std::map<unsigned int, Option *> optionsMap_;
};

class OptionValue
{
public:
	enum ValueType {
		ValueNone,
		ValueInteger,
		ValueString,
		ValueKeyValue,
		ValueArray,
	};

	OptionValue();
	OptionValue(int value);
	OptionValue(const char *value);
	OptionValue(const std::string &value);
	OptionValue(const KeyValueParser::Options &value);

	void addValue(const OptionValue &value);

	ValueType type() const { return type_; }

	operator int() const;
	operator std::string() const;
	operator KeyValueParser::Options() const;
	operator std::vector<OptionValue>() const;

	int toInteger() const;
	std::string toString() const;
	KeyValueParser::Options toKeyValues() const;
	std::vector<OptionValue> toArray() const;

private:
	ValueType type_;
	int integer_;
	std::string string_;
	KeyValueParser::Options keyValues_;
	std::vector<OptionValue> array_;
};

#endif /* __CAM_OPTIONS_H__ */