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 (33 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
#	Content
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	#define AEND (-1)
11
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	if (!isdigit(*arg))
38	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	}