strtod: aid debugging

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

diff --git a/tests/test-frexp.c b/tests/test-frexp.c
index 7d2a275..d5ab7e5 100644 (file)
--- a/tests/test-frexp.c
+++ b/tests/test-frexp.c
@@ -1,10 +1,10 @@
 /* Test of splitting a double into fraction and mantissa.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007-2010 Free Software Foundation, Inc.
 
-   This program is free software; you can redistribute it and/or modify
+   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.
+   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
@@ -12,8 +12,7 @@
    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.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
 
@@ -21,24 +20,23 @@
 
 #include <math.h>
 
+#include "signature.h"
+SIGNATURE_CHECK (frexp, double, (double, int *));
+
 #include <float.h>
-#include <stdlib.h>
 
-#include "isnan.h"
+#include "isnand-nolibm.h"
+#include "nan.h"
+#include "macros.h"
 
-#define ASSERT(expr) if (!(expr)) abort ();
+/* Avoid some warnings from "gcc -Wshadow".
+   This file doesn't use the exp() function.  */
+#undef exp
+#define exp exponent
 
-/* The Compaq (ex-DEC) C 6.4 compiler chokes on the expression 0.0 / 0.0.  */
-#ifdef __DECC
-static double
-NaN ()
-{
-  static double zero = 0.0;
-  return zero / zero;
-}
-#else
-# define NaN() (0.0 / 0.0)
-#endif
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
+   So we use -zero instead.  */
+double zero = 0.0;
 
 static double
 my_ldexp (double x, int d)
@@ -64,9 +62,9 @@ main ()
   { /* NaN.  */
     int exp = -9999;
     double mantissa;
-    x = NaN ();
+    x = NaNd ();
     mantissa = frexp (x, &exp);
-    ASSERT (isnan (mantissa));
+    ASSERT (isnand (mantissa));
   }
 
   { /* Positive infinity.  */
@@ -98,7 +96,7 @@ main ()
   { /* Negative zero.  */
     int exp = -9999;
     double mantissa;
-    x = -0.0;
+    x = -zero;
     mantissa = frexp (x, &exp);
     ASSERT (exp == 0);
     ASSERT (mantissa == x);