--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/test_utils.cpp Tue Dec 20 14:12:36 2022 +0100
@@ -0,0 +1,155 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "cx/utils.h"
+
+#include <gtest/gtest.h>
+
+TEST(Utils, ForN) {
+ unsigned j;
+ j = 0;
+ cx_for_n(i, 50) {
+ EXPECT_EQ(i, j);
+ j++;
+ }
+}
+
+TEST(Utils, szmul) {
+ size_t r;
+ int e;
+ e = cx_szmul(5, 7, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(35, r);
+
+ size_t s = SIZE_MAX & ~3;
+
+ e = cx_szmul(s / 4, 2, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(s / 2, r);
+ e = cx_szmul(2, s / 4, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(s / 2, r);
+
+ e = cx_szmul(s / 4, 4, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(s, r);
+
+ e = cx_szmul(4, s / 4, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(s, r);
+
+ e = cx_szmul(s / 4, 5, &r);
+ EXPECT_NE(0, e);
+
+ e = cx_szmul(5, s / 4, &r);
+ EXPECT_NE(0, e);
+
+ e = cx_szmul(SIZE_MAX - 4, 0, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(0, r);
+
+ e = cx_szmul(0, SIZE_MAX - 1, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(0, r);
+
+ e = cx_szmul(SIZE_MAX, 0, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(0, r);
+
+ e = cx_szmul(0, SIZE_MAX, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(0, r);
+
+ e = cx_szmul(0, 0, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(0, r);
+}
+
+#ifdef CX_SZMUL_BUILTIN
+
+// also test the custom implementation
+struct Utils_szmul_impl : ::testing::Test {
+#undef CX_SZMUL_BUILTIN
+
+#include "../src/utils.c"
+
+#define CX_SZMUL_BUILTIN
+};
+
+TEST_F(Utils_szmul_impl, Test) {
+ size_t r;
+ int e;
+ e = cx_szmul_impl(5, 7, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(35, r);
+
+ size_t s = SIZE_MAX & ~3;
+
+ e = cx_szmul_impl(s / 4, 2, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(s / 2, r);
+ e = cx_szmul_impl(2, s / 4, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(s / 2, r);
+
+ e = cx_szmul_impl(s / 4, 4, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(s, r);
+
+ e = cx_szmul_impl(4, s / 4, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(s, r);
+
+ e = cx_szmul_impl(s / 4, 5, &r);
+ EXPECT_NE(0, e);
+
+ e = cx_szmul_impl(5, s / 4, &r);
+ EXPECT_NE(0, e);
+
+ e = cx_szmul_impl(SIZE_MAX - 4, 0, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(0, r);
+
+ e = cx_szmul_impl(0, SIZE_MAX - 1, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(0, r);
+
+ e = cx_szmul_impl(SIZE_MAX, 0, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(0, r);
+
+ e = cx_szmul_impl(0, SIZE_MAX, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(0, r);
+
+ e = cx_szmul_impl(0, 0, &r);
+ EXPECT_EQ(0, e);
+ EXPECT_EQ(0, r);
+}
+
+#endif // CX_SZMUL_BUILTIN