57 lines
868 B
C
57 lines
868 B
C
#include <stdlib.h>
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#include <stdio.h>
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#include <signal.h>
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#include <setjmp.h>
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#include "lib.h"
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#ifndef NSIG
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#define NSIG _NSIG
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#endif
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/* Trap handling */
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int _trpline; /* BASIC return label */
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jmp_buf trpbuf;
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void _trpset(int nr)
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{
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/*debug printf("trap set to %d\n",nr);*/
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_trpline = nr;
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}
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void _trpfatal(int i)
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{
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extern int _errsym, _erlsym;
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_errsym = i;
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_setline();
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if (_trpline == 0)
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printf("LINE %d: FATAL ERROR: trap %d\n", _erlsym, i);
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#ifdef DEBUG
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printf("trap occurred %d return %d\n", i, _trpline);
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#endif
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_trap();
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}
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void _ini_trp(void)
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{
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/* initialize trap routines */
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int i;
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for (i = 0; i < NSIG; i++)
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signal(i, _trpfatal);
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}
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void _settrap(int nr)
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{
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_trpline = nr;
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}
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void _trap(void)
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{
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int line;
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if (_trpline == 0)
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exit(-1);
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line = _trpline;
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_trpline = 0; /* should be reset by user */
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_ini_trp();
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longjmp(trpbuf, line);
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}
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