stdlib/strtol.c

   1 /* Convert string representation of a number into an integer value.
   2    Copyright (C) 1991-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 #include <features.h>
  20 #undef __GLIBC_USE_C2X_STRTOL
  21 #define __GLIBC_USE_C2X_STRTOL 0
  22 #include <stdlib.h>
  23 #include <wchar.h>
  24 #include <locale/localeinfo.h>
  25
  26 #ifndef UNSIGNED
  27 # define UNSIGNED 0
  28 # define INT LONG int
  29 #else
  30 # define INT unsigned LONG int
  31 #endif
  32
  33 #if UNSIGNED
  34 # ifdef USE_WIDE_CHAR
  35 #  ifdef QUAD
  36 #   define strtol wcstoull
  37 #   define __strtol_l __wcstoull_l
  38 #   define __isoc23_strtol __isoc23_wcstoull
  39 #  else
  40 #   define strtol wcstoul
  41 #   define __strtol_l __wcstoul_l
  42 #   define __isoc23_strtol __isoc23_wcstoul
  43 #  endif
  44 # else
  45 #  ifdef QUAD
  46 #   define strtol strtoull
  47 #   define __strtol_l __strtoull_l
  48 #   define __isoc23_strtol __isoc23_strtoull
  49 #  else
  50 #   define strtol strtoul
  51 #   define __strtol_l __strtoul_l
  52 #   define __isoc23_strtol __isoc23_strtoul
  53 #  endif
  54 # endif
  55 #else
  56 # ifdef USE_WIDE_CHAR
  57 #  ifdef QUAD
  58 #   define strtol wcstoll
  59 #   define __strtol_l __wcstoll_l
  60 #   define __isoc23_strtol __isoc23_wcstoll
  61 #  else
  62 #   define strtol wcstol
  63 #   define __strtol_l __wcstol_l
  64 #   define __isoc23_strtol __isoc23_wcstol
  65 #  endif
  66 # else
  67 #  ifdef QUAD
  68 #   define strtol strtoll
  69 #   define __strtol_l __strtoll_l
  70 #   define __isoc23_strtol __isoc23_strtoll
  71 #  endif
  72 # endif
  73 #endif
  74
  75
  76 /* If QUAD is defined, we are defining `strtoll' or `strtoull',
  77    operating on `long long int's.  */
  78 #ifdef QUAD
  79 # define LONG long long
  80 #else
  81 # define LONG long
  82 #endif
  83
  84
  85 #ifdef USE_WIDE_CHAR
  86 # define STRING_TYPE wchar_t
  87 #else
  88 # define STRING_TYPE char
  89 #endif
  90
  91
  92 #define INTERNAL(X) INTERNAL1(X)
  93 #define INTERNAL1(X) __##X##_internal
  94
  95 #define SYM__(X) SYM__1 (X)
  96 #define SYM__1(X) __ ## X
  97 #define __strtol SYM__ (strtol)
  98
  99
 100 extern INT INTERNAL (__strtol_l) (const STRING_TYPE *, STRING_TYPE **, int,
 101                                   int, bool, locale_t);
 102
 103
 104 INT
 105 INTERNAL (strtol) (const STRING_TYPE *nptr, STRING_TYPE **endptr,
 106                    int base, int group)
 107 {
 108   return INTERNAL (__strtol_l) (nptr, endptr, base, group, false,
 109                                 _NL_CURRENT_LOCALE);
 110 }
 111 libc_hidden_def (INTERNAL (strtol))
 112
 113
 114 INT
 115 __strtol (const STRING_TYPE *nptr, STRING_TYPE **endptr, int base)
 116 {
 117   return INTERNAL (__strtol_l) (nptr, endptr, base, 0, false,
 118                                 _NL_CURRENT_LOCALE);
 119 }
 120 weak_alias (__strtol, strtol)
 121 libc_hidden_weak (strtol)
 122
 123 INT
 124 __isoc23_strtol (const STRING_TYPE *nptr, STRING_TYPE **endptr, int base)
 125 {
 126   return INTERNAL (__strtol_l) (nptr, endptr, base, 0, true,
 127                                 _NL_CURRENT_LOCALE);
 128 }
 129 libc_hidden_def (__isoc23_strtol)