wcsmbs/wcstold.c

   1 /* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <math.h>
  21 #include <wchar.h>
  22
  23 #ifndef __NO_LONG_DOUBLE_MATH
  24 /* The actual implementation for all floating point sizes is in strtod.c.
  25    These macros tell it to produce the `long double' version, `wcstold'.  */
  26
  27 # define FLOAT          long double
  28 # define FLT            LDBL
  29 # ifdef USE_IN_EXTENDED_LOCALE_MODEL
  30 #  define STRTOF        __wcstold_l
  31 # else
  32 #  define STRTOF        wcstold
  33 # endif
  34 # define MPN2FLOAT      __mpn_construct_long_double
  35 # define FLOAT_HUGE_VAL HUGE_VALL
  36 # define USE_WIDE_CHAR  1
  37 # define SET_MANTISSA(flt, mant) \
  38   do { union ieee854_long_double u;                                           \
  39        u.d = (flt);                                                           \
  40        if ((mant & 0x7fffffffffffffffULL) == 0)                               \
  41          mant = 0x4000000000000000ULL;                                        \
  42        u.ieee.mantissa0 = (((mant) >> 32) & 0x7fffffff) | 0x80000000;         \
  43        u.ieee.mantissa1 = (mant) & 0xffffffff;                                \
  44        (flt) = u.d;                                                           \
  45   } while (0)
  46
  47 # include <stdlib/strtod.c>
  48 #else
  49 /* There is no `long double' type, use the `double' implementations.  */
  50 long double
  51 __wcstold_internal (const wchar_t *nptr, wchar_t **endptr, int group)
  52 {
  53   return __wcstod_internal (nptr, endptr, group);
  54 }
  55 libc_hidden_def (__wcstold_internal)
  56
  57 long double
  58 wcstold (const wchar_t *nptr, wchar_t **endptr)
  59 {
  60   return __wcstod_internal (nptr, endptr, 0);
  61 }
  62 #endif