Initial revision

1 files changed, 61 insertions, 0 deletions

diff --git a/win/tclWinMtherr.c b/win/tclWinMtherr.c
new file mode 100644
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--- /dev/null
+++ b/win/tclWinMtherr.c
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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;
+}