add new standards subfile

[gnulib.git] / lib / frexp.c

diff --git a/lib/frexp.c b/lib/frexp.c
index 701f00e..7e1f5d1 100644 (file)
--- a/lib/frexp.c
+++ b/lib/frexp.c
@@ -1,62 +1,59 @@
 /* Split a double into fraction and mantissa.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007-2008 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
    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.  */
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 /* Written by Paolo Bonzini <bonzini@gnu.org>, 2003, and
    Bruno Haible <bruno@clisp.org>, 2007.  */
 
 #include <config.h>
 
-#if !(defined USE_LONG_DOUBLE && !HAVE_LONG_DOUBLE)
-
 /* Specification.  */
-# include <math.h>
+#include <math.h>
 
-# include <float.h>
-# ifdef USE_LONG_DOUBLE
-#  include "isnanl-nolibm.h"
-#  include "fpucw.h"
-# else
-#  include "isnan.h"
-# endif
+#include <float.h>
+#ifdef USE_LONG_DOUBLE
+# include "isnanl-nolibm.h"
+# include "fpucw.h"
+#else
+# include "isnand-nolibm.h"
+#endif
 
 /* This file assumes FLT_RADIX = 2.  If FLT_RADIX is a power of 2 greater
    than 2, or not even a power of 2, some rounding errors can occur, so that
    then the returned mantissa is only guaranteed to be <= 1.0, not < 1.0.  */
 
-# ifdef USE_LONG_DOUBLE
-#  define FUNC frexpl
-#  define DOUBLE long double
-#  define ISNAN isnanl
-#  define DECL_ROUNDING DECL_LONG_DOUBLE_ROUNDING
-#  define BEGIN_ROUNDING() BEGIN_LONG_DOUBLE_ROUNDING ()
-#  define END_ROUNDING() END_LONG_DOUBLE_ROUNDING ()
-#  define L_(literal) literal##L
-# else
-#  define FUNC frexp
-#  define DOUBLE double
-#  define ISNAN isnan
-#  define DECL_ROUNDING
-#  define BEGIN_ROUNDING()
-#  define END_ROUNDING()
-#  define L_(literal) literal
-# endif
+#ifdef USE_LONG_DOUBLE
+# define FUNC frexpl
+# define DOUBLE long double
+# define ISNAN isnanl
+# define DECL_ROUNDING DECL_LONG_DOUBLE_ROUNDING
+# define BEGIN_ROUNDING() BEGIN_LONG_DOUBLE_ROUNDING ()
+# define END_ROUNDING() END_LONG_DOUBLE_ROUNDING ()
+# define L_(literal) literal##L
+#else
+# define FUNC frexp
+# define DOUBLE double
+# define ISNAN isnand
+# define DECL_ROUNDING
+# define BEGIN_ROUNDING()
+# define END_ROUNDING()
+# define L_(literal) literal
+#endif
 
 DOUBLE
-FUNC (DOUBLE x, int *exp)
+FUNC (DOUBLE x, int *expptr)
 {
   int sign;
   int exponent;
@@ -65,7 +62,7 @@ FUNC (DOUBLE x, int *exp)
   /* Test for NaN, infinity, and zero.  */
   if (ISNAN (x) || x + x == x)
     {
-      *exp = 0;
+      *expptr = 0;
       return x;
     }
 
@@ -164,14 +161,6 @@ FUNC (DOUBLE x, int *exp)
 
   END_ROUNDING ();
 
-  *exp = exponent;
+  *expptr = exponent;
   return x;
 }
-
-#else
-
-/* This declaration is solely to ensure that after preprocessing
-   this file is never empty.  */
-typedef int dummy;
-
-#endif