allow construction of BigInt from sal_Int64 on 32 bit

Change-Id: Ib68920fc9bd693d2f2679b4fc27d9956dc42fc86

1 files changed, 113 insertions, 0 deletions

diff --git a/tools/qa/cppunit/test_bigint.cxx b/tools/qa/cppunit/test_bigint.cxx
new file mode 100644
index 000000000000..39ab2503f4ac
--- /dev/null
+++ b/tools/qa/cppunit/test_bigint.cxx
@@ -0,0 +1,113 @@
+/* -*- 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 .
+ */
+
+#include <limits>
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+
+#include <rtl/math.hxx>
+
+#include <tools/bigint.hxx>
+
+namespace tools
+{
+
+class BigIntTest : public CppUnit::TestFixture
+{
+public:
+#if SAL_TYPES_SIZEOFLONG < SAL_TYPES_SIZEOFLONGLONG
+    void testConstructionFromInt64();
+#endif
+
+    CPPUNIT_TEST_SUITE(BigIntTest);
+#if SAL_TYPES_SIZEOFLONG < SAL_TYPES_SIZEOFLONGLONG
+    CPPUNIT_TEST(testConstructionFromLongLong);
+#endif
+    CPPUNIT_TEST_SUITE_END();
+};
+
+#if SAL_TYPES_SIZEOFLONG < SAL_TYPES_SIZEOFLONGLONG
+void BigIntTest::testConstructionFromLongLong()
+{
+    // small positive number
+    {
+        BigInt bi(static_cast<sal_Int64>(42));
+        CPPUNIT_ASSERT(bi.IsSet());
+        CPPUNIT_ASSERT(!bi.IsZero());
+        CPPUNIT_ASSERT(!bi.IsNeg());
+        CPPUNIT_ASSERT(bi.IsLong());
+        CPPUNIT_ASSERT_EQUAL(42L, bi);
+    }
+
+    // small negative number
+    {
+        BigInt bi(static_cast<sal_Int64>(-42));
+        CPPUNIT_ASSERT(bi.IsSet());
+        CPPUNIT_ASSERT(!bi.IsZero());
+        CPPUNIT_ASSERT(bi.IsNeg());
+        CPPUNIT_ASSERT(bi.IsLong());
+        CPPUNIT_ASSERT_EQUAL(-42L, bi);
+    }
+
+    // positive number just fitting to long
+    {
+        BigInt bi(static_cast<sal_Int64>(std::numeric_limits<long>::max()));
+        CPPUNIT_ASSERT(bi.IsSet());
+        CPPUNIT_ASSERT(!bi.IsZero());
+        CPPUNIT_ASSERT(!bi.IsNeg());
+        CPPUNIT_ASSERT(bi.IsLong());
+        CPPUNIT_ASSERT_EQUAL(std::numeric_limits<long>::max(), bi);
+    }
+
+    // negative number just fitting to long
+    {
+        BigInt bi(static_cast<sal_Int64>(std::numeric_limits<long>::min()));
+        CPPUNIT_ASSERT(bi.IsSet());
+        CPPUNIT_ASSERT(!bi.IsZero());
+        CPPUNIT_ASSERT(bi.IsNeg());
+        CPPUNIT_ASSERT(bi.IsLong());
+        CPPUNIT_ASSERT_EQUAL(std::numeric_limits<long>::min(), bi);
+    }
+
+    // positive number not fitting to long
+    {
+        BigInt bi(static_cast<sal_Int64>(std::numeric_limits<long>::max() + 1));
+        CPPUNIT_ASSERT(bi.IsSet());
+        CPPUNIT_ASSERT(!bi.IsZero());
+        CPPUNIT_ASSERT(!bi.IsNeg());
+        CPPUNIT_ASSERT(!bi.IsLong());
+    }
+
+    // negative number not fitting to long
+    {
+        BigInt bi(static_cast<sal_Int64>(std::numeric_limits<long>::min() - 1));
+        BigInt bi(static_cast<sal_Int64>(42));
+        CPPUNIT_ASSERT(bi.IsSet());
+        CPPUNIT_ASSERT(!bi.IsZero());
+        CPPUNIT_ASSERT(bi.IsNeg());
+        CPPUNIT_ASSERT(!bi.IsLong());
+    }
+}
+#endif
+
+CPPUNIT_TEST_SUITE_REGISTRATION(BigIntTest);
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */