| 1 |
/* Copyright (c) 1991 Regents of the University of California */ |
| 2 |
|
| 3 |
#ifndef lint |
| 4 |
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
#endif |
| 6 |
|
| 7 |
/* |
| 8 |
* Convert angle ranges of the form a-b:s,c to discrete values |
| 9 |
*/ |
| 10 |
|
| 11 |
#include <ctype.h> |
| 12 |
|
| 13 |
#include "setscan.h" |
| 14 |
|
| 15 |
|
| 16 |
setscan(ang, arg) /* set up scan according to arg */ |
| 17 |
register ANGLE *ang; |
| 18 |
register char *arg; |
| 19 |
{ |
| 20 |
int state = ','; |
| 21 |
int start, finish, step; |
| 22 |
|
| 23 |
while (state) { |
| 24 |
switch (state) { |
| 25 |
case ',': |
| 26 |
start = atoi(arg); |
| 27 |
finish = start; |
| 28 |
step = 1; |
| 29 |
break; |
| 30 |
case '-': |
| 31 |
finish = atoi(arg); |
| 32 |
if (finish < start) |
| 33 |
return(-1); |
| 34 |
break; |
| 35 |
case ':': |
| 36 |
step = atoi(arg); |
| 37 |
break; |
| 38 |
default: |
| 39 |
return(-1); |
| 40 |
} |
| 41 |
if (!isdigit(*arg)) |
| 42 |
return(-1); |
| 43 |
do |
| 44 |
arg++; |
| 45 |
while (isdigit(*arg)); |
| 46 |
state = *arg++; |
| 47 |
if (!state || state == ',') |
| 48 |
while (start <= finish) { |
| 49 |
*ang++ = start; |
| 50 |
start += step; |
| 51 |
} |
| 52 |
} |
| 53 |
*ang = AEND; |
| 54 |
return(0); |
| 55 |
} |
