mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/* Compatibility functions for floating point formatting, reentrant,
|
|
long double versions.
|
|
Copyright (C) 1996, 1997, 1999 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"
|
|
#define FLOAT_NAME_EXT l
|
|
#define FLOAT_MIN_10_EXP LDBL_MIN_10_EXP
|
|
#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
|
|
#if LDBL_MIN_10_EXP == -37
|
|
# define FLOAT_MIN_10_NORM 1.0e-37L
|
|
#elif LDBL_MIN_10_EXP == -291
|
|
# define FLOAT_MIN_10_NORM 1.0e-291L
|
|
#elif LDBL_MIN_10_EXP == -307
|
|
# define FLOAT_MIN_10_NORM 1.0e-307L
|
|
#elif LDBL_MIN_10_EXP == -4931
|
|
# define FLOAT_MIN_10_NORM 1.0e-4931L
|
|
#else
|
|
/* libc can't depend on libm. */
|
|
# error "FLOAT_MIN_10_NORM must be precomputed"
|
|
# define FLOAT_MIN_10_NORM exp10l (LDBL_MIN_10_EXP)
|
|
#endif
|
|
|
|
#include "efgcvt_r.c"
|