688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
/* Compatibility functions for floating point formatting, long double version.
|
|
Copyright (C) 1996-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <float.h>
|
|
|
|
#define FLOAT_TYPE long double
|
|
#define FUNC_PREFIX q
|
|
#define FLOAT_FMT_FLAG "L"
|
|
/* Actually we have to write (LDBL_DIG + log10 (LDBL_MAX_10_EXP)) but
|
|
we don't have log10 available in the preprocessor. Since we cannot
|
|
assume anything on the used `long double' format be generous. */
|
|
#define MAXDIG (NDIGIT_MAX + 12)
|
|
#define FCVT_MAXDIG (LDBL_MAX_10_EXP + MAXDIG)
|
|
#if LDBL_MANT_DIG == 64
|
|
# define NDIGIT_MAX 21
|
|
#elif LDBL_MANT_DIG == 53
|
|
# define NDIGIT_MAX 17
|
|
#elif LDBL_MANT_DIG == 113
|
|
# define NDIGIT_MAX 36
|
|
#elif LDBL_MANT_DIG == 106
|
|
# define NDIGIT_MAX 34
|
|
#elif LDBL_MANT_DIG == 56
|
|
# define NDIGIT_MAX 18
|
|
#else
|
|
/* See IEEE 854 5.6, table 2 for this formula. Unfortunately we need a
|
|
compile time constant here, so we cannot use it. */
|
|
# error "NDIGIT_MAX must be precomputed"
|
|
# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * LDBL_MANT_DIG + 1.0)))
|
|
#endif
|
|
|
|
#include "efgcvt.c"
|