1/* Convert string representation of a number into an uintmax_t value.
2   Copyright 1999-2005 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.  Modified by Chet Ramey for Bash. */
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#include <stdc.h>
33
34/* Verify a requirement at compile-time (unlike assert, which is runtime).  */
35#define verify(name, assertion) struct name { char a[(assertion) ? 1 : -1]; }
36
37#ifndef HAVE_DECL_STRTOUL
38"this configure-time declaration test was not run"
39#endif
40#if !HAVE_DECL_STRTOUL
41extern unsigned long strtoul __P((const char *, char **, int));
42#endif
43
44#ifndef HAVE_DECL_STRTOULL
45"this configure-time declaration test was not run"
46#endif
47#if !HAVE_DECL_STRTOULL && HAVE_UNSIGNED_LONG_LONG
48extern unsigned long long strtoull __P((const char *, char **, int));
49#endif
50
51#ifdef strtoumax
52#undef strtoumax
53#endif
54
55uintmax_t
56strtoumax (ptr, endptr, base)
57     const char *ptr;
58     char **endptr;
59     int base;
60{
61#if HAVE_UNSIGNED_LONG_LONG
62  verify (size_is_that_of_unsigned_long_or_unsigned_long_long,
63	  (sizeof (uintmax_t) == sizeof (unsigned long) ||
64	   sizeof (uintmax_t) == sizeof (unsigned long long)));
65
66  if (sizeof (uintmax_t) != sizeof (unsigned long))
67    return (strtoull (ptr, endptr, base));
68#else
69  verify (size_is_that_of_unsigned_long, sizeof (uintmax_t) == sizeof (unsigned long));
70#endif
71
72  return (strtoul (ptr, endptr, base));
73}
74
75#ifdef TESTING
76# include <stdio.h>
77int
78main ()
79{
80  char *p, *endptr;
81  uintmax_t x;
82#if HAVE_UNSIGNED_LONG_LONG
83  unsigned long long y;
84#endif
85  unsigned long z;
86
87  printf ("sizeof uintmax_t: %d\n", sizeof (uintmax_t));
88
89#if HAVE_UNSIGNED_LONG_LONG
90  printf ("sizeof unsigned long long: %d\n", sizeof (unsigned long long));
91#endif
92  printf ("sizeof unsigned long: %d\n", sizeof (unsigned long));
93
94  x = strtoumax("42", &endptr, 10);
95#if HAVE_LONG_LONG
96  y = strtoull("42", &endptr, 10);
97#else
98  y = 0;
99#endif
100  z = strtoul("42", &endptr, 10);
101
102  printf ("%llu %llu %lu\n", x, y, z);
103
104  exit (0);
105}
106#endif
107