stdlib/strtold.c

   1 /* Read decimal floating point numbers.
   2    This file is part of the GNU C Library.
   3    Copyright (C) 1995-2023 Free Software Foundation, Inc.
   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, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 /* The actual implementation for all floating point sizes is in strtod.c.
  20    These macros tell it to produce the `float' version, `strtof'.  */
  21
  22 #include <bits/floatn.h>
  23 #include <bits/long-double.h>
  24
  25 #if __HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128
  26 # define strtof128 __hide_strtof128
  27 # define wcstof128 __hide_wcstof128
  28 #endif
  29 #if __HAVE_FLOAT64X_LONG_DOUBLE
  30 # define strtof64x __hide_strtof64x
  31 # define wcstof64x __hide_wcstof64x
  32 #endif
  33
  34 #ifdef __LONG_DOUBLE_MATH_OPTIONAL
  35 # include <wchar.h>
  36 # define NEW(x) NEW1(x)
  37 # define NEW1(x) __new_##x
  38 long double ____new_strtold_internal (const char *, char **, int);
  39 long double __new_strtold (const char *, char **);
  40 long double ____new_wcstold_internal (const wchar_t *, wchar_t **, int);
  41 long double __new_wcstold (const wchar_t *, wchar_t **);
  42 libc_hidden_proto (____new_strtold_internal)
  43 libc_hidden_proto (____new_wcstold_internal)
  44 libc_hidden_proto (__new_strtold)
  45 libc_hidden_proto (__new_wcstold)
  46 #else
  47 # define NEW(x) x
  48 #endif
  49
  50 #define FLOAT           long double
  51 #define FLT             LDBL
  52 #ifdef USE_WIDE_CHAR
  53 # define STRTOF         NEW (wcstold)
  54 # define STRTOF_L       __wcstold_l
  55 #else
  56 # define STRTOF         NEW (strtold)
  57 # define STRTOF_L       __strtold_l
  58 #endif
  59
  60 #include "strtod.c"
  61
  62 #ifdef __LONG_DOUBLE_MATH_OPTIONAL
  63 # include <math_ldbl_opt.h>
  64 # ifdef USE_WIDE_CHAR
  65 long_double_symbol (libc, __new_wcstold, wcstold);
  66 long_double_symbol (libc, ____new_wcstold_internal, __wcstold_internal);
  67 libc_hidden_ver (____new_wcstold_internal, __wcstold_internal)
  68 # else
  69 long_double_symbol (libc, __new_strtold, strtold);
  70 long_double_symbol (libc, ____new_strtold_internal, __strtold_internal);
  71 libc_hidden_ver (____new_strtold_internal, __strtold_internal)
  72 # endif
  73 #endif
  74
  75 #if __HAVE_FLOAT128 && !__HAVE_DISTINCT_FLOAT128
  76 # undef strtof128
  77 # undef wcstof128
  78 # ifdef USE_WIDE_CHAR
  79 weak_alias (NEW (wcstold), wcstof128)
  80 # else
  81 weak_alias (NEW (strtold), strtof128)
  82 # endif
  83 #endif
  84
  85 #if __HAVE_FLOAT64X_LONG_DOUBLE
  86 # undef strtof64x
  87 # undef wcstof64x
  88 # ifdef USE_WIDE_CHAR
  89 weak_alias (NEW (wcstold), wcstof64x)
  90 # else
  91 weak_alias (NEW (strtold), strtof64x)
  92 # endif
  93 #endif