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/*

 * tclWinMtherr.c --

 *

 *      This function provides a default implementation of the

 *      _matherr function for Borland C++.

 *

 * Copyright (c) 1995 Sun Microsystems, Inc.

 *

 * See the file "license.terms" for information on usage and redistribution

 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.

 *

 * RCS: @(#) $Id: tclWinMtherr.c,v 1.1.1.1 2002-01-16 10:25:38 markom Exp $

 */

#include "tclInt.h"

#include "tclPort.h"

#include <math.h>

/*

 * The following variable is secretly shared with Tcl so we can

 * tell if expression evaluation is in progress.  If not, matherr

 * just emulates the default behavior, which includes printing

 * a message.

 */

extern int tcl_MathInProgress;

/*

 *----------------------------------------------------------------------

 *

 * _matherr --

 *

 *      This procedure is invoked by Borland C++ when certain

 *      errors occur in mathematical functions.  This procedure

 *      replaces the default implementation which generates pop-up

 *      warnings.

 *

 * Results:

 *      Returns 1 to indicate that we've handled the error

 *      locally.

 *

 * Side effects:

 *      Sets errno based on what's in xPtr.

 *

 *----------------------------------------------------------------------

 */

int

_matherr(xPtr)

    struct exception *xPtr;     /* Describes error that occurred. */

{

    if (!tcl_MathInProgress) {

        return 0;

    }

    if ((xPtr->type == DOMAIN) || (xPtr->type == SING)) {

        errno = EDOM;

    } else {

        errno = ERANGE;

    }

    return 1;

}