Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 70 insertions, 0 deletions

diff --git a/sc/inc/math.hxx b/sc/inc/math.hxx
new file mode 100644
index 000000000..492e5d914
--- /dev/null
+++ b/sc/inc/math.hxx
@@ -0,0 +1,70 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <formula/errorcodes.hxx>
+
+namespace sc {
+
+/** Return fNumerator/fDenominator if fDenominator!=0 else #DIV/0! error coded
+    into double.
+ */
+inline double div( const double& fNumerator, const double& fDenominator )
+{
+    return (fDenominator != 0.0) ? (fNumerator / fDenominator) :
+        CreateDoubleError( FormulaError::DivisionByZero);
+}
+
+/** Return fNumerator/fDenominator if fDenominator!=0 else +-Infinity if
+    fNumerator!=0 or NaN if fNumerator==0.
+
+    This allows to build/run with -fsanitize=float-divide-by-zero and have a
+    defined behavior for the otherwise undefined division by zero case ("If the
+    second operand of / or % is zero the behavior is undefined."
+    ([expr.mul]/4)).
+
+    The Calc interpreter gracefully handles Infinity or NaN double values
+    encountered as interim or final results, using this function we can ensure
+    defined behavior where desired.
+
+    Use where the double coded error creating div() is not wanted.
+ */
+inline double divide( const double& fNumerator, const double& fDenominator )
+{
+    if (fDenominator == 0.0)
+    {
+        if (std::isfinite( fNumerator) && fNumerator != 0.0)
+            return std::signbit(fNumerator) ? -std::numeric_limits<double>::infinity()
+                                            :  std::numeric_limits<double>::infinity();
+        return std::numeric_limits<double>::quiet_NaN();
+    }
+    return fNumerator / fDenominator;
+}
+
+/** Return pow(fVal1,fVal2) with error handling.
+
+    If an error was detected, a coded double error of
+    FormulaError::IllegalFPOperation is returned.
+ */
+double power( const double& fVal1, const double& fVal2 );
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */