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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/*
* Copyright (C) 2007-2023 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#ifndef BU_OPT_PARSER_H
#define BU_OPT_PARSER_H
#include "bu/string.h"
#include "bu/list.h"
#include "bu/hash.h"
#include "bu/signals.h"
#include "bu/array.h"
#include "bu/membuf.h"
#include "bu/formatter.h"
#include "bu/variant.h"
namespace Bu
{
typedef Bu::Array<Bu::String> StrArray;
typedef Bu::Array<Bu::String> StringArray;
/**
* POSIX/Gnu style command line parser. Handles long and short options in
* a variety of fun and useful ways, along with singal based callbacks and
* automatic variable setting. It's pretty easy to use, and very flexible.
*
* OptParser supports it's own builtin help mechanism which automatically
* enumerates the available options and their help in a well formatted and
* easy to read way, automatically formatting your help text per option and
* allows for addition "help banners" which can be placed wherever you
* would like.
*/
class OptParser
{
private:
class _ValueProxy
{
public:
_ValueProxy();
virtual ~_ValueProxy();
virtual void setValueFromStr( const Bu::String & )=0;
virtual void setValue( const Bu::Variant &vVar )=0;
virtual _ValueProxy *clone()=0;
};
template<typename ptype>
class ValueProxy : public _ValueProxy
{
public:
ValueProxy( ptype &v ) :
v( v )
{
}
virtual ~ValueProxy()
{
}
virtual void setValueFromStr( const Bu::String &sVal )
{
Bu::MemBuf mb( sVal );
Bu::Formatter f( mb );
f << Bu::Fmt().tokenize( false );
f >> v;
}
virtual void setValue( const Bu::Variant &vVar )
{
if( vVar.getType() == typeid(ptype) )
{
v = vVar.get<ptype>();
}
else if( vVar.getType() == typeid(Bu::String) )
{
setValueFromStr( vVar.get<Bu::String>() );
}
else
{
Bu::MemBuf mb;
Bu::Formatter f( mb );
// f << vVar;
setValueFromStr( mb.getString() );
}
}
virtual _ValueProxy *clone()
{
return new ValueProxy<ptype>( v );
}
private:
ptype &v;
};
public:
typedef Signal1<int, StrArray> OptionSignal;
class Option
{
public:
Option();
Option( const Option &rSrc );
virtual ~Option();
char cOpt;
Bu::String sOpt;
Bu::String sHelp;
OptionSignal sUsed;
_ValueProxy *pProxy;
Bu::Variant sOverride;
Bu::String sHelpDefault;
};
private:
typedef Bu::List<Option> OptionList;
typedef Bu::Hash<char, Option *> ShortOptionHash;
typedef Bu::Hash<Bu::String, Option *> LongOptionHash;
class Banner
{
public:
Bu::String sText;
bool bFormatted;
OptionList::const_iterator iAfter;
};
typedef Bu::List<Banner> BannerList;
public:
OptParser();
virtual ~OptParser();
void parse( int argc, char **argv );
void parse( const Bu::String &sLine );
void addOption( const Option &opt );
template<typename vtype>
void addOption( vtype &var, char cOpt, const Bu::String &sOpt,
const Bu::String &sHelp )
{
Option o;
o.cOpt = cOpt;
o.sOpt = sOpt;
o.pProxy = new ValueProxy<vtype>( var );
o.sHelp = sHelp;
addOption( o );
}
template<typename vtype>
void addOption( vtype &var, const Bu::String &sOpt,
const Bu::String &sHelp )
{
addOption( var, '\0', sOpt, sHelp );
}
template<typename vtype>
void addOption( vtype &var, char cOpt, const Bu::String &sHelp )
{
addOption( var, cOpt, "", sHelp );
}
void addOption( OptionSignal sUsed, char cOpt, const Bu::String &sOpt,
const Bu::String &sHelp )
{
Option o;
o.cOpt = cOpt;
o.sOpt = sOpt;
o.sUsed = sUsed;
o.sHelp = sHelp;
addOption( o );
}
void addOption( OptionSignal sUsed, const Bu::String &sOpt,
const Bu::String &sHelp )
{
addOption( sUsed, '\0', sOpt, sHelp );
}
void addOption( OptionSignal sUsed, char cOpt,
const Bu::String &sHelp )
{
addOption( sUsed, cOpt, "", sHelp );
}
void setOverride( char cOpt, const Bu::Variant &sOverride );
void setOverride( const Bu::String &sOpt,
const Bu::Variant &sOverride );
void setHelpDefault( const Bu::String &sOpt, const Bu::String &sTxt );
void addHelpOption( char c='h', const Bu::String &s="help",
const Bu::String &sHelp="This help." );
void addHelpBanner( const Bu::String &sText, bool bFormatted=true );
int optHelp( StrArray aParams );
/**
* This function is called when an unrecognized option is found, the
* default behaviour is to print an error to stdout and exit( 1 ), if
* you want to do something different, just override this function.
* This is also called by default when something is found that hasn't
* been handled by an option, and isn't an option (starts with - or --).
* To change this behaviour call
*/
virtual void optionError( const Bu::String &sOption );
void setNonOption( OptionSignal sSignal );
private:
Bu::String format( const Bu::String &sIn, int iWidth, int iIndent );
OptionList lOption;
ShortOptionHash hsOption;
LongOptionHash hlOption;
BannerList lBanner;
OptionSignal sNonOption;
};
};
#endif
|
