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
|
/* OPT v3.9: options parsing tool */
/*
*
* Copyright (C) 1996,1997,1998,1999 James Theiler
*
* 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 2 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 (it is in the file COPYING); if not, write
* to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
*/
/****************************************
* Show up a weirdness in opt hooks.
* Written by Mark Muldoon 21 Oct 97
* The weirdness was in fact a bug in opt,
* which was fixed in going from v3.0 to v3.1
*/
# include <stdio.h>
# include <opt.h>
/****************************************
* Prototypes for hooks.
*/
int check_hook(void *a_ptr);
/****************************************
* Global variables.
*/
int a_global ;
/* _______________________________________ */
int
main( int argc, char *argv[] )
/****************************************
* Register a single command line
* option and give it a hook.
*/
{
optrega( &a_global, OPT_INT, 'a',
"set_a_global", "Set a global variable" ) ;
opthook( &a_global, check_hook ) ;
opt( &argc, &argv ) ;
return 0;
}
/* ____________________________________ */
int check_hook( void *a_ptr )
/****************************************
* Check whether the hook recieves the
* correct value.
*/
{
int a_local, verdict ;
a_local = *((int *) a_ptr) ;
if( a_local == a_global ) {
printf( "All is well.\n" ) ;
verdict = OPT_OK ;
}
else {
printf( "Confusion reigns: *a_ptr = %d, ", a_local ) ;
printf( "but a_global = %d.\n", a_global ) ;
verdict = OPT_ERROR ;
}
return( verdict ) ;
}
|
