mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-26 00:57:39 +03:00
f9a2a6369d
1999-07-29 Andreas Schwab <schwab@suse.de> * misc/efgcvt.c (NDIGIT_MAX): Provide precomputed constants for all floating point formats supported by gcc. Error out for unhandled precisions. * misc/efgcvt_r.c (NDIGIT_MAX): Likewise. * misc/qefgcvt.c (NDIGIT_MAX): Likewise. * misc/qefgcvt_r.c (NDIGIT_MAX): Likewise.
43 lines
1.5 KiB
C
43 lines
1.5 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <float.h>
|
|
|
|
#define FLOAT_TYPE long double
|
|
#define FUNC_PREFIX q
|
|
#define FLOAT_FMT_FLAG "L"
|
|
#define FLOAT_NAME_EXT l
|
|
#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 == 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_r.c"
|