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 Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the 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    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    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 #define FLOAT_MIN_10_EXP LDBL_MIN_10_EXP
  28 #if LDBL_MANT_DIG == 64
  29 # define NDIGIT_MAX 21
  30 #elif LDBL_MANT_DIG == 53
  31 # define NDIGIT_MAX 17
  32 #elif LDBL_MANT_DIG == 113
  33 # define NDIGIT_MAX 36
  34 #elif LDBL_MANT_DIG == 106
  35 # define NDIGIT_MAX 34
  36 #elif LDBL_MANT_DIG == 56
  37 # define NDIGIT_MAX 18
  38 #else
  39 /* See IEEE 854 5.6, table 2 for this formula.  Unfortunately we need a
  40    compile time constant here, so we cannot use it.  */
  41 # error "NDIGIT_MAX must be precomputed"
  42 # define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * LDBL_MANT_DIG + 1.0)))
  43 #endif
  44 #if LDBL_MIN_10_EXP == -37
  45 # define FLOAT_MIN_10_NORM      1.0e-37L
  46 #elif LDBL_MIN_10_EXP == -291
  47 # define FLOAT_MIN_10_NORM      1.0e-291L
  48 #elif LDBL_MIN_10_EXP == -307
  49 # define FLOAT_MIN_10_NORM      1.0e-307L
  50 #elif LDBL_MIN_10_EXP == -4931
  51 # define FLOAT_MIN_10_NORM      1.0e-4931L
  52 #else
  53 /* libc can't depend on libm.  */
  54 # error "FLOAT_MIN_10_NORM must be precomputed"
  55 # define FLOAT_MIN_10_NORM      exp10l (LDBL_MIN_10_EXP)
  56 #endif
  57
  58 #include "efgcvt_r.c"