sysdeps/ieee754/ldbl-64-128/strtold_l.c

   1 /* Copyright (C) 1999-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <math.h>
  19 #include <stdlib.h>
  20 #include <wchar.h>
  21 #include <xlocale.h>
  22
  23 /* The actual implementation for all floating point sizes is in strtod.c.
  24    These macros tell it to produce the `long double' version, `strtold'.  */
  25
  26 #define FLOAT           long double
  27 #define FLT             LDBL
  28 #ifdef USE_WIDE_CHAR
  29 extern long double ____new_wcstold_l (const wchar_t *, wchar_t **, __locale_t);
  30 # define STRTOF         __new_wcstold_l
  31 # define __STRTOF       ____new_wcstold_l
  32 # define ____STRTOF_INTERNAL ____wcstold_l_internal
  33 #else
  34 extern long double ____new_strtold_l (const char *, char **, __locale_t);
  35 # define STRTOF         __new_strtold_l
  36 # define __STRTOF       ____new_strtold_l
  37 # define ____STRTOF_INTERNAL ____strtold_l_internal
  38 #endif
  39 extern __typeof (__STRTOF) STRTOF;
  40 libc_hidden_proto (__STRTOF)
  41 libc_hidden_proto (STRTOF)
  42 #define MPN2FLOAT       __mpn_construct_long_double
  43 #define FLOAT_HUGE_VAL  HUGE_VALL
  44 #define SET_MANTISSA(flt, mant) \
  45   do { union ieee854_long_double u;                                           \
  46        u.d = (flt);                                                           \
  47        u.ieee_nan.mantissa0 = 0;                                              \
  48        u.ieee_nan.mantissa1 = 0;                                              \
  49        u.ieee_nan.mantissa2 = (mant) >> 32;                                   \
  50        u.ieee_nan.mantissa3 = (mant);                                         \
  51        if ((u.ieee.mantissa0 | u.ieee.mantissa1                               \
  52             | u.ieee.mantissa2 | u.ieee.mantissa3) != 0)                      \
  53          (flt) = u.d;                                                         \
  54   } while (0)
  55
  56 #include <strtod_l.c>
  57
  58 #ifdef __LONG_DOUBLE_MATH_OPTIONAL
  59 # include <math_ldbl_opt.h>
  60 # ifdef USE_WIDE_CHAR
  61 weak_alias (____new_wcstold_l, ___new_wcstold_l);
  62 long_double_symbol (libc, ___new_wcstold_l, wcstold_l);
  63 long_double_symbol (libc, ____new_wcstold_l, __wcstold_l);
  64 # else
  65 weak_alias (____new_strtold_l, ___new_strtold_l);
  66 long_double_symbol (libc, ___new_strtold_l, strtold_l);
  67 long_double_symbol (libc, ____new_strtold_l, __strtold_l);
  68 # endif
  69 #endif