62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
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/*
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* tclWinMtherr.c --
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*
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* This function provides a default implementation of the
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* _matherr function for Borland C++.
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*
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* Copyright (c) 1995 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* SCCS: @(#) tclWinMtherr.c 1.2 96/02/15 11:54:05
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*/
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#include "tclInt.h"
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#include "tclPort.h"
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#include <math.h>
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/*
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* The following variable is secretly shared with Tcl so we can
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* tell if expression evaluation is in progress. If not, matherr
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* just emulates the default behavior, which includes printing
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* a message.
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*/
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extern int tcl_MathInProgress;
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/*
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*----------------------------------------------------------------------
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*
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* _matherr --
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*
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* This procedure is invoked by Borland C++ when certain
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* errors occur in mathematical functions. This procedure
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* replaces the default implementation which generates pop-up
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* warnings.
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*
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* Results:
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* Returns 1 to indicate that we've handled the error
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* locally.
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*
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* Side effects:
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* Sets errno based on what's in xPtr.
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*
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*----------------------------------------------------------------------
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*/
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int
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_matherr(xPtr)
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struct exception *xPtr; /* Describes error that occurred. */
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{
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if (!tcl_MathInProgress) {
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return 0;
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}
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if ((xPtr->type == DOMAIN) || (xPtr->type == SING)) {
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errno = EDOM;
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} else {
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errno = ERANGE;
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}
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return 1;
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}
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