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
|
/*************************************************************************
** CmdLineParserBase.h **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2009 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, but **
** WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#ifndef CMDLINEPARSERBASE_H
#define CMDLINEPARSERBASE_H
#include <string>
#include <vector>
class InputReader;
class CmdLineParserBase
{
protected:
struct Option;
struct OptionHandler {
virtual void operator () (CmdLineParserBase *obj, InputReader &ir, const Option &opt, bool longopt) const=0;
};
template <typename T>
class OptionHandlerImpl : public OptionHandler {
protected:
typedef void (T::*LocalHandler)(InputReader &ir, const Option &opt, bool longopt);
public:
OptionHandlerImpl (LocalHandler handler) : _handler(handler) {}
void operator () (CmdLineParserBase *obj, InputReader &ir, const Option &opt, bool longopt) const {
if (T *tobj = dynamic_cast<T*>(obj))
(tobj->*_handler)(ir, opt, longopt);
}
private:
LocalHandler _handler;
};
struct Option {
~Option () {delete handler;}
char shortname;
const char *longname;
char argmode; // mode of option argument: '\0'=none, 'o'=optional, 'r'=required
const OptionHandler *handler;
};
public:
virtual void parse (int argc, char **argv, bool printErrors=true);
virtual void help () const {}
virtual int numOptions () const {return 0;}
virtual int numFiles () const {return _files.size();}
virtual const char* file (size_t n) {return (n >= 0 && n < _files.size()) ? _files[n].c_str() : 0;}
virtual void status () const;
virtual bool error () const {return _error;}
protected:
CmdLineParserBase () : _error(false) {}
CmdLineParserBase (const CmdLineParserBase &cmd) {}
virtual void init ();
virtual void error (const Option &opt, bool longopt, const char *msg) const;
bool checkArgPrefix (InputReader &ir, const Option &opt, bool longopt) const;
bool checkNoArg (InputReader &ir, const Option &opt, bool longopt) const;
bool getIntArg (InputReader &ir, const Option &opt, bool longopt, int &arg) const;
bool getUIntArg (InputReader &ir, const Option &opt, bool longopt, unsigned &arg) const;
bool getDoubleArg (InputReader &ir, const Option &opt, bool longopt, double &arg) const;
bool getStringArg (InputReader &ir, const Option &opt, bool longopt, std::string &arg) const;
const Option* option (char shortname) const;
const Option* option (const std::string &longname) const;
virtual const Option* options () const {return 0;}
private:
bool _printErrors; ///< if true, print error messages
mutable bool _error; ///< error occured while parsing options
std::vector<std::string> _files; ///< filename parameters
};
#endif
|
