stdlib/strtol.c

   1 /* Convert string representation of a number into an integer value.
   2    Copyright (C) 1991-2020 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 <stdlib.h>
  20 #include <wchar.h>
  21 #include <locale/localeinfo.h>
  22
  23 #ifndef UNSIGNED
  24 # define UNSIGNED 0
  25 # define INT LONG int
  26 #else
  27 # define INT unsigned LONG int
  28 #endif
  29
  30 #if UNSIGNED
  31 # ifdef USE_WIDE_CHAR
  32 #  ifdef QUAD
  33 #   define strtol wcstoull
  34 #   define __strtol_l __wcstoull_l
  35 #  else
  36 #   define strtol wcstoul
  37 #   define __strtol_l __wcstoul_l
  38 #  endif
  39 # else
  40 #  ifdef QUAD
  41 #   define strtol strtoull
  42 #   define __strtol_l __strtoull_l
  43 #  else
  44 #   define strtol strtoul
  45 #   define __strtol_l __strtoul_l
  46 #  endif
  47 # endif
  48 #else
  49 # ifdef USE_WIDE_CHAR
  50 #  ifdef QUAD
  51 #   define strtol wcstoll
  52 #   define __strtol_l __wcstoll_l
  53 #  else
  54 #   define strtol wcstol
  55 #   define __strtol_l __wcstol_l
  56 #  endif
  57 # else
  58 #  ifdef QUAD
  59 #   define strtol strtoll
  60 #   define __strtol_l __strtoll_l
  61 #  endif
  62 # endif
  63 #endif
  64
  65
  66 /* If QUAD is defined, we are defining `strtoll' or `strtoull',
  67    operating on `long long int's.  */
  68 #ifdef QUAD
  69 # define LONG long long
  70 #else
  71 # define LONG long
  72 #endif
  73
  74
  75 #ifdef USE_WIDE_CHAR
  76 # define STRING_TYPE wchar_t
  77 #else
  78 # define STRING_TYPE char
  79 #endif
  80
  81
  82 #define INTERNAL(X) INTERNAL1(X)
  83 #define INTERNAL1(X) __##X##_internal
  84
  85 #define SYM__(X) SYM__1 (X)
  86 #define SYM__1(X) __ ## X
  87 #define __strtol SYM__ (strtol)
  88
  89
  90 extern INT INTERNAL (__strtol_l) (const STRING_TYPE *, STRING_TYPE **, int,
  91                                   int, locale_t);
  92
  93
  94 INT
  95 INTERNAL (strtol) (const STRING_TYPE *nptr, STRING_TYPE **endptr,
  96                    int base, int group)
  97 {
  98   return INTERNAL (__strtol_l) (nptr, endptr, base, group, _NL_CURRENT_LOCALE);
  99 }
 100 libc_hidden_def (INTERNAL (strtol))
 101
 102
 103 INT
 104 __strtol (const STRING_TYPE *nptr, STRING_TYPE **endptr, int base)
 105 {
 106   return INTERNAL (__strtol_l) (nptr, endptr, base, 0, _NL_CURRENT_LOCALE);
 107 }
 108 weak_alias (__strtol, strtol)
 109 libc_hidden_weak (strtol)