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Annotation of 43BSDReno/lib/libpc/EXCEPT.c, revision 1.1.1.1

1.1       root        1: /*-
                      2:  * Copyright (c) 1982 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that: (1) source distributions retain this entire copyright
                      7:  * notice and comment, and (2) distributions including binaries display
                      8:  * the following acknowledgement:  ``This product includes software
                      9:  * developed by the University of California, Berkeley and its contributors''
                     10:  * in the documentation or other materials provided with the distribution
                     11:  * and in all advertising materials mentioning features or use of this
                     12:  * software. Neither the name of the University nor the names of its
                     13:  * contributors may be used to endorse or promote products derived
                     14:  * from this software without specific prior written permission.
                     15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     18:  */
                     19: 
                     20: #ifndef lint
                     21: static char sccsid[] = "@(#)EXCEPT.c   1.5 (Berkeley) 4/9/90";
                     22: #endif /* not lint */
                     23: 
                     24: #include       <signal.h>
                     25: 
                     26: /*
                     27:  * catch runtime arithmetic errors
                     28:  */
                     29: EXCEPT(signum, type)
                     30:        int signum, type;
                     31: {
                     32:        signal(SIGFPE, EXCEPT);
                     33: #ifndef vax
                     34:        ERROR("Overflow, underflow, or division by zero in arithmetic operation\n");
                     35:        return;
                     36: #endif notvax
                     37: #ifdef vax
                     38:        /*
                     39:         * The values for this switch statement come from page 12-5 of
                     40:         * Volume 1 of the 1978 VAX 11/780 Architecture Handbook
                     41:         */
                     42:        switch (type) {
                     43:        case FPE_INTOVF_TRAP:
                     44:                ERROR("Integer overflow\n");
                     45:                return;
                     46:        case FPE_INTDIV_TRAP:
                     47:                ERROR("Integer division by zero\n");
                     48:                return;
                     49:        case FPE_FLTOVF_TRAP:
                     50:        case FPE_FLTOVF_FAULT:
                     51:                ERROR("Real overflow\n");
                     52:                return;
                     53:        case FPE_FLTDIV_TRAP:
                     54:        case FPE_FLTDIV_FAULT:
                     55:                ERROR("Real division by zero\n");
                     56:                return;
                     57:        case FPE_FLTUND_TRAP:
                     58:        case FPE_FLTUND_FAULT:
                     59:                ERROR("Real underflow\n");
                     60:                return;
                     61:        case FPE_DECOVF_TRAP:
                     62:        case FPE_SUBRNG_TRAP:
                     63:        default:
                     64:                ERROR("Undefined arithmetic exception type (%d)\n", type);
                     65:                return;
                     66:        }
                     67: #endif vax
                     68: }

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