/* Split a double into fraction and mantissa, for hexadecimal printf.
Copyright (C) 2007 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/>. */
#include <config.h>
-#if !(defined USE_LONG_DOUBLE && !HAVE_LONG_DOUBLE)
-
/* Specification. */
-# ifdef USE_LONG_DOUBLE
-# include "printf-frexpl.h"
-# else
-# include "printf-frexp.h"
-# endif
+#ifdef USE_LONG_DOUBLE
+# include "printf-frexpl.h"
+#else
+# include "printf-frexp.h"
+#endif
-# include <float.h>
-# include <math.h>
-# ifdef USE_LONG_DOUBLE
-# include "fpucw.h"
-# endif
+#include <float.h>
+#include <math.h>
+#ifdef USE_LONG_DOUBLE
+# include "fpucw.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 <= 2.0, not < 2.0. */
-# ifdef USE_LONG_DOUBLE
-# define FUNC printf_frexpl
-# define DOUBLE long double
-# define MIN_EXP LDBL_MIN_EXP
-# if HAVE_FREXPL_IN_LIBC && HAVE_LDEXPL_IN_LIBC
-# define USE_FREXP_LDEXP
-# define FREXP frexpl
-# define LDEXP ldexpl
-# endif
-# 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 printf_frexp
-# define DOUBLE double
-# define MIN_EXP DBL_MIN_EXP
-# if HAVE_FREXP_IN_LIBC && HAVE_LDEXP_IN_LIBC
-# define USE_FREXP_LDEXP
-# define FREXP frexp
-# define LDEXP ldexp
-# endif
-# define DECL_ROUNDING
-# define BEGIN_ROUNDING()
-# define END_ROUNDING()
-# define L_(literal) literal
+#ifdef USE_LONG_DOUBLE
+# define FUNC printf_frexpl
+# define DOUBLE long double
+# define MIN_EXP LDBL_MIN_EXP
+# if HAVE_FREXPL_IN_LIBC && HAVE_LDEXPL_IN_LIBC
+# define USE_FREXP_LDEXP
+# define FREXP frexpl
+# define LDEXP ldexpl
+# endif
+# 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 printf_frexp
+# define DOUBLE double
+# define MIN_EXP DBL_MIN_EXP
+# if HAVE_FREXP_IN_LIBC && HAVE_LDEXP_IN_LIBC
+# define USE_FREXP_LDEXP
+# define FREXP frexp
+# define LDEXP ldexp
# endif
+# 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 exponent;
DECL_ROUNDING
BEGIN_ROUNDING ();
-# ifdef USE_FREXP_LDEXP
+#ifdef USE_FREXP_LDEXP
/* frexp and ldexp are usually faster than the loop below. */
x = FREXP (x, &exponent);
x = LDEXP (x, exponent - (MIN_EXP - 1));
exponent = MIN_EXP - 1;
}
-# else
+#else
{
/* Since the exponent is an 'int', it fits in 64 bits. Therefore the
loops are executed no more than 64 times. */
/* Here either x < 1.0 and exponent = MIN_EXP - 1,
or 1.0 <= x < 2.0 and exponent >= MIN_EXP - 1. */
}
-# endif
+#endif
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