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 |
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/* |
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* Convert angle ranges of the form a-b:s,c to discrete values |
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*/ |
7 |
greg |
1.1 |
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8 |
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#include <ctype.h> |
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10 |
greg |
1.3 |
#include "setscan.h" |
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schorsch |
2.3 |
int |
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setscan( /* set up scan according to arg */ |
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register ANGLE *ang, |
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register char *arg |
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) |
17 |
greg |
1.1 |
{ |
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int state = ','; |
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int start, finish, step; |
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21 |
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while (state) { |
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switch (state) { |
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case ',': |
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start = atoi(arg); |
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finish = start; |
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step = 1; |
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break; |
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case '-': |
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finish = atoi(arg); |
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if (finish < start) |
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return(-1); |
32 |
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break; |
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case ':': |
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step = atoi(arg); |
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break; |
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default: |
37 |
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return(-1); |
38 |
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} |
39 |
greg |
1.2 |
if (!isdigit(*arg)) |
40 |
greg |
1.1 |
return(-1); |
41 |
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do |
42 |
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arg++; |
43 |
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while (isdigit(*arg)); |
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state = *arg++; |
45 |
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if (!state || state == ',') |
46 |
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while (start <= finish) { |
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*ang++ = start; |
48 |
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start += step; |
49 |
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} |
50 |
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} |
51 |
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*ang = AEND; |
52 |
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return(0); |
53 |
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} |