| 1 |
greg |
1.3 |
#ifndef lint
|
| 2 |
schorsch |
2.3 |
static const char RCSid[] = "$Id: setscan.c,v 2.2 2003/02/22 02:07:30 greg Exp $";
|
| 3 |
greg |
1.3 |
#endif
|
| 4 |
|
|
/*
|
| 5 |
|
|
* Convert angle ranges of the form a-b:s,c to discrete values
|
| 6 |
|
|
*/
|
| 7 |
greg |
1.1 |
|
| 8 |
|
|
#include <ctype.h>
|
| 9 |
|
|
|
| 10 |
greg |
1.3 |
#include "setscan.h"
|
| 11 |
|
|
|
| 12 |
schorsch |
2.3 |
int
|
| 13 |
|
|
setscan( /* set up scan according to arg */
|
| 14 |
|
|
register ANGLE *ang,
|
| 15 |
|
|
register char *arg
|
| 16 |
|
|
)
|
| 17 |
greg |
1.1 |
{
|
| 18 |
|
|
int state = ',';
|
| 19 |
|
|
int start, finish, step;
|
| 20 |
|
|
|
| 21 |
|
|
while (state) {
|
| 22 |
|
|
switch (state) {
|
| 23 |
|
|
case ',':
|
| 24 |
|
|
start = atoi(arg);
|
| 25 |
|
|
finish = start;
|
| 26 |
|
|
step = 1;
|
| 27 |
|
|
break;
|
| 28 |
|
|
case '-':
|
| 29 |
|
|
finish = atoi(arg);
|
| 30 |
|
|
if (finish < start)
|
| 31 |
|
|
return(-1);
|
| 32 |
|
|
break;
|
| 33 |
|
|
case ':':
|
| 34 |
|
|
step = atoi(arg);
|
| 35 |
|
|
break;
|
| 36 |
|
|
default:
|
| 37 |
|
|
return(-1);
|
| 38 |
|
|
}
|
| 39 |
greg |
1.2 |
if (!isdigit(*arg))
|
| 40 |
greg |
1.1 |
return(-1);
|
| 41 |
|
|
do
|
| 42 |
|
|
arg++;
|
| 43 |
|
|
while (isdigit(*arg));
|
| 44 |
|
|
state = *arg++;
|
| 45 |
|
|
if (!state || state == ',')
|
| 46 |
|
|
while (start <= finish) {
|
| 47 |
|
|
*ang++ = start;
|
| 48 |
|
|
start += step;
|
| 49 |
|
|
}
|
| 50 |
|
|
}
|
| 51 |
|
|
*ang = AEND;
|
| 52 |
|
|
return(0);
|
| 53 |
|
|
}
|
