lib/strtoimax.c

   1 /* Convert string representation of a number into an intmax_t value.
   2
   3    Copyright (C) 1999, 2001-2004, 2006, 2009-2024 Free Software Foundation,
   4    Inc.
   5
   6    This file is free software: you can redistribute it and/or modify
   7    it under the terms of the GNU Lesser General Public License as
   8    published by the Free Software Foundation, either version 3 of the
   9    License, or (at your option) any later version.
  10
  11    This file 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
  14    GNU Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public License
  17    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  18
  19 /* Written by Paul Eggert. */
  20
  21 #include <config.h>
  22
  23 /* Verify interface.  */
  24 #include <inttypes.h>
  25
  26 #include <stdlib.h>
  27
  28 #ifdef UNSIGNED
  29 # ifndef HAVE_DECL_STRTOULL
  30 "this configure-time declaration test was not run"
  31 # endif
  32 # if !HAVE_DECL_STRTOULL
  33 unsigned long long int strtoull (char const *, char **, int);
  34 # endif
  35
  36 #else
  37
  38 # ifndef HAVE_DECL_STRTOLL
  39 "this configure-time declaration test was not run"
  40 # endif
  41 # if !HAVE_DECL_STRTOLL
  42 long long int strtoll (char const *, char **, int);
  43 # endif
  44 #endif
  45
  46 #ifdef UNSIGNED
  47 # define Int uintmax_t
  48 # define Strtoimax strtoumax
  49 # define Strtol strtoul
  50 # define Strtoll strtoull
  51 # define Unsigned unsigned
  52 #else
  53 # define Int intmax_t
  54 # define Strtoimax strtoimax
  55 # define Strtol strtol
  56 # define Strtoll strtoll
  57 # define Unsigned
  58 #endif
  59
  60 Int
  61 Strtoimax (char const *ptr, char **endptr, int base)
  62 {
  63   static_assert (sizeof (Int) == sizeof (Unsigned long int)
  64                  || sizeof (Int) == sizeof (Unsigned long long int));
  65
  66   if (sizeof (Int) != sizeof (Unsigned long int))
  67     return Strtoll (ptr, endptr, base);
  68
  69   return Strtol (ptr, endptr, base);
  70 }