lib/strtoimax.c

   1 /* Convert string representation of a number into an intmax_t value.
   2
   3    Copyright (C) 1999, 2001-2004, 2006, 2009-2012 Free Software Foundation,
   4    Inc.
   5
   6    This program is free software: you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program 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 General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://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 #include "verify.h"
  29
  30 #ifdef UNSIGNED
  31 # ifndef HAVE_DECL_STRTOULL
  32 "this configure-time declaration test was not run"
  33 # endif
  34 # if !HAVE_DECL_STRTOULL && HAVE_UNSIGNED_LONG_LONG_INT
  35 unsigned long long int strtoull (char const *, char **, int);
  36 # endif
  37
  38 #else
  39
  40 # ifndef HAVE_DECL_STRTOLL
  41 "this configure-time declaration test was not run"
  42 # endif
  43 # if !HAVE_DECL_STRTOLL && HAVE_LONG_LONG_INT
  44 long long int strtoll (char const *, char **, int);
  45 # endif
  46 #endif
  47
  48 #ifdef UNSIGNED
  49 # define Have_long_long HAVE_UNSIGNED_LONG_LONG_INT
  50 # define Int uintmax_t
  51 # define Unsigned unsigned
  52 # define strtoimax strtoumax
  53 # define strtol strtoul
  54 # define strtoll strtoull
  55 #else
  56 # define Have_long_long HAVE_LONG_LONG_INT
  57 # define Int intmax_t
  58 # define Unsigned
  59 #endif
  60
  61 Int
  62 strtoimax (char const *ptr, char **endptr, int base)
  63 {
  64 #if Have_long_long
  65   verify (sizeof (Int) == sizeof (Unsigned long int)
  66           || sizeof (Int) == sizeof (Unsigned long long int));
  67
  68   if (sizeof (Int) != sizeof (Unsigned long int))
  69     return strtoll (ptr, endptr, base);
  70 #else
  71   verify (sizeof (Int) == sizeof (Unsigned long int));
  72 #endif
  73
  74   return strtol (ptr, endptr, base);
  75 }