ack/lang/basic/lib/return.c

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C
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1994-06-24 11:31:16 +00:00
/* $Id$ */
1984-11-29 14:22:02 +00:00
#define MAXNESTING 1000
int _gotable[MAXNESTING];
int topstk=0;
_gosub(x)
int x;
{
/* administer gosub */
#ifdef DEBUG
printf("store %d in %d\n",x,topstk);
#endif
if( topstk== MAXNESTING) error(26);
_gotable[topstk]= x;
topstk++;
}
_retstmt()
{
/* make sure that a return label index is on top
of the stack */
#ifdef DEBUG
printf("return to %d %d\n",_gotable[topstk-1],topstk-1);
#endif
if( topstk==0 || topstk==MAXNESTING)
error(1);
return( _gotable[--topstk]);
}