misc/qefgcvt_r.c

   1 /* Compatibility functions for floating point formatting, reentrant,
   2    long double versions.
   3    Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <float.h>
  22
  23 #define FLOAT_TYPE long double
  24 #define FUNC_PREFIX q
  25 #define FLOAT_FMT_FLAG "L"
  26 #define FLOAT_NAME_EXT l
  27 #if LDBL_MANT_DIG == 64
  28 # define NDIGIT_MAX 21
  29 #elif LDBL_MANT_DIG == 53
  30 # define NDIGIT_MAX 17
  31 #elif LDBL_MANT_DIG == 113
  32 # define NDIGIT_MAX 36
  33 #elif LDBL_MANT_DIG == 56
  34 # define NDIGIT_MAX 18
  35 #else
  36 /* See IEEE 854 5.6, table 2 for this formula.  Unfortunately we need a
  37    compile time constant here, so we cannot use it.  */
  38 # error "NDIGIT_MAX must be precomputed"
  39 # define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * LDBL_MANT_DIG + 1.0)))
  40 #endif
  41
  42 #include "efgcvt_r.c"