1 files changed, 129 insertions, 0 deletions
diff --git a/tests/test-math-h.c b/tests/test-math-h.c
new file mode 100644
index 00000000..4a878bb3
--- /dev/null
+++ b/tests/test-math-h.c
@@ -0,0 +1,129 @@
+/* Test of <math.h> substitute.
+   Copyright (C) 2007-2025 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 3 of the License, 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, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+
+#include <config.h>
+
+#include <math.h>
+
+#ifndef INFINITY
+# error INFINITY should be defined, added in ISO C 99
+choke me
+#endif
+
+#ifndef NAN
+# error NAN should be defined, added in ISO C 99
+choke me
+#endif
+
+#ifndef HUGE_VALF
+# error HUGE_VALF should be defined
+choke me
+#endif
+
+#ifndef HUGE_VAL
+# error HUGE_VAL should be defined
+choke me
+#endif
+
+#ifndef HUGE_VALL
+# error HUGE_VALL should be defined
+choke me
+#endif
+
+#ifndef FP_ILOGB0
+# error FP_ILOGB0 should be defined
+choke me
+#endif
+
+#ifndef FP_ILOGBNAN
+# error FP_ILOGBNAN should be defined
+choke me
+#endif
+
+/* Check that INFINITY expands into a constant expression.  */
+float in = INFINITY;
+
+/* Check that NAN expands into a constant expression.  */
+float na = NAN;
+
+/* Check that HUGE_VALF expands into a constant expression.  */
+float hf = HUGE_VALF;
+
+/* Check that HUGE_VAL expands into a constant expression.  */
+double hd = HUGE_VAL;
+
+/* Check that HUGE_VALL expands into a constant expression.  */
+long double hl = HUGE_VALL;
+
+#include <limits.h>
+
+#include "macros.h"
+
+/* Compare two numbers with ==.
+   This is a separate function in order to disable compiler optimizations.  */
+static int
+numeric_equalf (float x, float y)
+{
+  return x == y;
+}
+static int
+numeric_equald (double x, double y)
+{
+  return x == y;
+}
+static int
+numeric_equall (long double x, long double y)
+{
+  return x == y;
+}
+
+int
+main (void)
+{
+  double d;
+  double zero = 0.0;
+
+  /* Check that INFINITY is a float.  */
+  ASSERT (sizeof (INFINITY) == sizeof (float));
+
+  /* Check that NAN is a float.  */
+  ASSERT (sizeof (NAN) == sizeof (float));
+
+  /* Check the value of NAN.  */
+  d = NAN;
+  ASSERT (!numeric_equald (d, d));
+
+  /* Check the value of HUGE_VALF.  */
+  ASSERT (numeric_equalf (HUGE_VALF, HUGE_VALF + HUGE_VALF));
+
+  /* Check the value of HUGE_VAL.  */
+  d = HUGE_VAL;
+  ASSERT (numeric_equald (d, 1.0 / zero));
+  ASSERT (numeric_equald (HUGE_VAL, HUGE_VAL + HUGE_VAL));
+
+  /* Check the value of HUGE_VALL.  */
+  ASSERT (numeric_equall (HUGE_VALL, HUGE_VALL + HUGE_VALL));
+
+  /* Check the value of FP_ILOGB0.  */
+  ASSERT (FP_ILOGB0 == INT_MIN || FP_ILOGB0 == - INT_MAX);
+
+  /* Check the value of FP_ILOGBNAN.  */
+  ASSERT (FP_ILOGBNAN == INT_MIN || FP_ILOGBNAN == INT_MAX);
+
+  return test_exit_status;
+}