src/util/setscan.c

/* Copyright (c) 1991 Regents of the University of California */

/* SCCSid "$SunId$ LBL" */

/* Copyright (c) 1991 Regents of the University of California */

#include <ctype.h>

#define  ANGLE          short
#define  AEND           (-1)

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:	1.2
Committed:	Wed Mar 13 16:23:49 1991 UTC (34 years, 8 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+2 -2 lines
Log Message:	got rid of negative angles
#	User	Rev	Content
1	greg	1.1	/* Copyright (c) 1991 Regents of the University of California */
2
3			/* SCCSid "$SunId$ LBL" */
4
5			/* Copyright (c) 1991 Regents of the University of California */
6
7			#include <ctype.h>
8
9			#define ANGLE short
10	greg	1.2	#define AEND (-1)
11	greg	1.1
12			setscan(ang, arg) /* set up scan according to arg */
13			register ANGLE *ang;
14			register char *arg;
15			{
16			int state = ',';
17			int start, finish, step;
18
19			while (state) {
20			switch (state) {
21			case ',':
22			start = atoi(arg);
23			finish = start;
24			step = 1;
25			break;
26			case '-':
27			finish = atoi(arg);
28			if (finish < start)
29			return(-1);
30			break;
31			case ':':
32			step = atoi(arg);
33			break;
34			default:
35			return(-1);
36			}
37	greg	1.2	if (!isdigit(*arg))
38	greg	1.1	return(-1);
39			do
40			arg++;
41			while (isdigit(*arg));
42			state = *arg++;
43			if (!state \|\| state == ',')
44			while (start <= finish) {
45			*ang++ = start;
46			start += step;
47			}
48			}
49			*ang = AEND;
50			return(0);
51			}