stdlib/strtold.c

   1 /* Read decimal floating point numbers.
   2    This file is part of the GNU C Library.
   3    Copyright (C) 1995-2021 Free Software Foundation, Inc.
   4    Contributed by Ulrich Drepper <drepper@gnu.org>, 1995.
   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, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 /* The actual implementation for all floating point sizes is in strtod.c.
  21    These macros tell it to produce the `float' version, `strtof'.  */
  22
  23 #include <bits/floatn.h>
  24 #include <bits/long-double.h>
  25
  26 #if __HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128
  27 # define strtof128 __hide_strtof128
  28 # define wcstof128 __hide_wcstof128
  29 #endif
  30 #if __HAVE_FLOAT64X_LONG_DOUBLE
  31 # define strtof64x __hide_strtof64x
  32 # define wcstof64x __hide_wcstof64x
  33 #endif
  34
  35 #ifdef __LONG_DOUBLE_MATH_OPTIONAL
  36 # include <wchar.h>
  37 # define NEW(x) NEW1(x)
  38 # define NEW1(x) __new_##x
  39 long double ____new_strtold_internal (const char *, char **, int);
  40 long double __new_strtold (const char *, char **);
  41 long double ____new_wcstold_internal (const wchar_t *, wchar_t **, int);
  42 long double __new_wcstold (const wchar_t *, wchar_t **);
  43 libc_hidden_proto (____new_strtold_internal)
  44 libc_hidden_proto (____new_wcstold_internal)
  45 libc_hidden_proto (__new_strtold)
  46 libc_hidden_proto (__new_wcstold)
  47 #else
  48 # define NEW(x) x
  49 #endif
  50
  51 #define FLOAT           long double
  52 #define FLT             LDBL
  53 #ifdef USE_WIDE_CHAR
  54 # define STRTOF         NEW (wcstold)
  55 # define STRTOF_L       __wcstold_l
  56 #else
  57 # define STRTOF         NEW (strtold)
  58 # define STRTOF_L       __strtold_l
  59 #endif
  60
  61 #include "strtod.c"
  62
  63 #ifdef __LONG_DOUBLE_MATH_OPTIONAL
  64 # include <math_ldbl_opt.h>
  65 # ifdef USE_WIDE_CHAR
  66 long_double_symbol (libc, __new_wcstold, wcstold);
  67 long_double_symbol (libc, ____new_wcstold_internal, __wcstold_internal);
  68 libc_hidden_ver (____new_wcstold_internal, __wcstold_internal)
  69 # else
  70 long_double_symbol (libc, __new_strtold, strtold);
  71 long_double_symbol (libc, ____new_strtold_internal, __strtold_internal);
  72 libc_hidden_ver (____new_strtold_internal, __strtold_internal)
  73 # endif
  74 #endif
  75
  76 #if __HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128
  77 # undef strtof128
  78 # undef wcstof128
  79 # ifdef USE_WIDE_CHAR
  80 weak_alias (NEW (wcstold), wcstof128)
  81 # else
  82 weak_alias (NEW (strtold), strtof128)
  83 # endif
  84 #endif
  85
  86 #if __HAVE_FLOAT64X_LONG_DOUBLE
  87 # undef strtof64x
  88 # undef wcstof64x
  89 # ifdef USE_WIDE_CHAR
  90 weak_alias (NEW (wcstold), wcstof64x)
  91 # else
  92 weak_alias (NEW (strtold), strtof64x)
  93 # endif
  94 #endif