src/util/setscan.c

#ifndef lint
static const char       RCSid[] = "$Id$";
#endif
/*
 * Convert angle ranges of the form a-b:s,c to discrete values
 */

#include <ctype.h>

#include "setscan.h"


setscan(ang, arg)                       /* set up scan according to arg */
register ANGLE  *ang;
register char  *arg;
{
        int  state = ',';
        int  start, finish, step;

        while (state) {
                switch (state) {
                case ',':
                        start = atoi(arg);
                        finish = start;
                        step = 1;
                        break;
                case '-':
                        finish = atoi(arg);
                        if (finish < start)
                                return(-1);
                        break;
                case ':':
                        step = atoi(arg);
                        break;
                default:
                        return(-1);
                }
                if (!isdigit(*arg))
                        return(-1);
                do
                        arg++;
                while (isdigit(*arg));
                state = *arg++;
                if (!state || state == ',')
                        while (start <= finish) {
                                *ang++ = start;
                                start += step;
                        }
        }
        *ang = AEND;
        return(0);
}
Revision:	2.2
Committed:	Sat Feb 22 02:07:30 2003 UTC (22 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad3R5
Changes since 2.1:	+1 -4 lines
Log Message:	Changes and check-in for 3.5 release Includes new source files and modifications not recorded for many years See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release
#	Content
1	#ifndef lint
2	static const char RCSid[] = "$Id$";
3	#endif
4	/*
5	* Convert angle ranges of the form a-b:s,c to discrete values
6	*/
7
8	#include <ctype.h>
9
10	#include "setscan.h"
11
12
13	setscan(ang, arg) /* set up scan according to arg */
14	register ANGLE *ang;
15	register char *arg;
16	{
17	int state = ',';
18	int start, finish, step;
19
20	while (state) {
21	switch (state) {
22	case ',':
23	start = atoi(arg);
24	finish = start;
25	step = 1;
26	break;
27	case '-':
28	finish = atoi(arg);
29	if (finish < start)
30	return(-1);
31	break;
32	case ':':
33	step = atoi(arg);
34	break;
35	default:
36	return(-1);
37	}
38	if (!isdigit(*arg))
39	return(-1);
40	do
41	arg++;
42	while (isdigit(*arg));
43	state = *arg++;
44	if (!state \|\| state == ',')
45	while (start <= finish) {
46	*ang++ = start;
47	start += step;
48	}
49	}
50	*ang = AEND;
51	return(0);
52	}