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