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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.
- *
- * SCCS: @(#) tclWinMtherr.c 1.2 96/02/15 11:54:05
- */
-
- #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;
- }
-