Dogcows Code - chaz/tar/blob - lib/strtoimax.c

   1 /* Convert string representation of a number into an uintmax_t value.
   2    Copyright 2001 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 /* Written by Paul Eggert. */
  19
  20 #if HAVE_CONFIG_H
  21 # include <config.h>
  22 #endif
  23
  24 #if HAVE_INTTYPES_H
  25 # include <inttypes.h>
  26 #endif
  27
  28 #if HAVE_STDLIB_H
  29 # include <stdlib.h>
  30 #endif
  31
  32 #ifndef PARAMS
  33 # if defined PROTOTYPES || defined __STDC__
  34 #  define PARAMS(Args) Args
  35 # else
  36 #  define PARAMS(Args) ()
  37 # endif
  38 #endif
  39
  40 #ifdef STRTOUXMAX_UNSIGNED
  41 # ifndef HAVE_DECL_STRTOUL
  42 "this configure-time declaration test was not run"
  43 # endif
  44 # if !HAVE_DECL_STRTOUL
  45 unsigned long strtoul PARAMS ((char const *, char **, int));
  46 # endif
  47 # ifndef HAVE_DECL_STRTOULL
  48 "this configure-time declaration test was not run"
  49 # endif
  50 # if !HAVE_DECL_STRTOULL && HAVE_UNSIGNED_LONG_LONG
  51 unsigned long long strtoull PARAMS ((char const *, char **, int));
  52 # endif
  53
  54 #else
  55
  56 # ifndef HAVE_DECL_STRTOL
  57 "this configure-time declaration test was not run"
  58 # endif
  59 # if !HAVE_DECL_STRTOL
  60 long strtol PARAMS ((char const *, char **, int));
  61 # endif
  62 # ifndef HAVE_DECL_STRTOLL
  63 "this configure-time declaration test was not run"
  64 # endif
  65 # if !HAVE_DECL_STRTOLL && HAVE_UNSIGNED_LONG_LONG
  66 long long strtoll PARAMS ((char const *, char **, int));
  67 # endif
  68 #endif
  69
  70 #ifndef STRTOUXMAX_UNSIGNED
  71 # define strtoumax strtoimax
  72 # define uintmax_t intmax_t
  73 # define strtoull strtoll
  74 # define strtoul strtol
  75 #endif
  76
  77 uintmax_t
  78 strtoumax (char const *ptr, char **endptr, int base)
  79 {
  80 #define USE_IF_EQUIVALENT(function) \
  81     if (sizeof (uintmax_t) == sizeof function (ptr, endptr, base)) \
  82       return function (ptr, endptr, base);
  83
  84 #if HAVE_UNSIGNED_LONG_LONG
  85     USE_IF_EQUIVALENT (strtoull)
  86 #endif
  87
  88   USE_IF_EQUIVALENT (strtoul)
  89
  90   abort ();
  91 }
  92
  93 #ifdef TESTING
  94 # include <stdio.h>
  95 int
  96 main ()
  97 {
  98   char *p, *endptr;
  99   printf ("sizeof xintmax_t: %d\n", sizeof (uintmax_t));
 100   printf ("sizeof strtoxll(): %d\n", sizeof strtoull(p, &endptr, 10));
 101   printf ("sizeof strtoxl(): %d\n", sizeof strtoul(p, &endptr, 10));
 102   exit (0);
 103 }
 104 #endif