Test for module 'truncl'.

[gnulib.git] / tests / test-truncl.c

diff --git a/tests/test-truncl.c b/tests/test-truncl.c
new file mode 100644 (file)
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+/* Test of rounding towards zero.
+   Copyright (C) 2007 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <math.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "fpucw.h"
+#include "isnanl-nolibm.h"
+
+#define ASSERT(expr) \
+  do                                                                        \
+    {                                                                       \
+      if (!(expr))                                                          \
+        {                                                                   \
+          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+          abort ();                                                         \
+        }                                                                   \
+    }                                                                       \
+  while (0)
+
+int
+main ()
+{
+  DECL_LONG_DOUBLE_ROUNDING
+
+  BEGIN_LONG_DOUBLE_ROUNDING ();
+
+  /* Zero.  */
+  ASSERT (truncl (0.0L) == 0.0L);
+  ASSERT (truncl (-0.0L) == 0.0L);
+  /* Positive numbers.  */
+  ASSERT (truncl (0.3L) == 0.0L);
+  ASSERT (truncl (0.7L) == 0.0L);
+  ASSERT (truncl (1.0L) == 1.0L);
+  ASSERT (truncl (1.5L) == 1.0L);
+  ASSERT (truncl (1.999L) == 1.0L);
+  ASSERT (truncl (2.0L) == 2.0L);
+  ASSERT (truncl (65535.999L) == 65535.0L);
+  ASSERT (truncl (65536.0L) == 65536.0L);
+  ASSERT (truncl (2.341e31L) == 2.341e31L);
+  /* Negative numbers.  */
+  ASSERT (truncl (-0.3L) == 0.0L);
+  ASSERT (truncl (-0.7L) == 0.0L);
+  ASSERT (truncl (-1.0L) == -1.0L);
+  ASSERT (truncl (-1.5L) == -1.0L);
+  ASSERT (truncl (-1.999L) == -1.0L);
+  ASSERT (truncl (-2.0L) == -2.0L);
+  ASSERT (truncl (-65535.999L) == -65535.0L);
+  ASSERT (truncl (-65536.0L) == -65536.0L);
+  ASSERT (truncl (-2.341e31L) == -2.341e31L);
+  /* Infinite numbers.  */
+  ASSERT (truncl (1.0L / 0.0L) == 1.0L / 0.0L);
+  ASSERT (truncl (-1.0L / 0.0L) == -1.0L / 0.0L);
+  /* NaNs.  */
+  ASSERT (isnanl (truncl (0.0L / 0.0L)));
+
+  return 0;
+}