55 lines
754 B
C
55 lines
754 B
C
#include <signal.h>
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#include <setjmp.h>
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/* $Header$ */
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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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_trpset(nr)
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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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_trpfatal(i)
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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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_ini_trp()
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{
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/* initialize trap routines */
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int i, _trpfatal();
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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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_settrap(nr)
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int nr;
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{
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_trpline=nr;
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}
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_trap()
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{
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int line;
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if( _trpline==0) 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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