1/* strtoumax - convert string representation of a number into an uintmax_t value. */
2
3/* Copyright 1999-2005 Free Software Foundation, Inc.
4
5   This file is part of GNU Bash, the Bourne Again SHell.
6
7   Bash is free software: you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation, either version 3 of the License, or
10   (at your option) any later version.
11
12   Bash is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with Bash.  If not, see <http://www.gnu.org/licenses/>.
19*/
20/* Written by Paul Eggert.  Modified by Chet Ramey for Bash. */
21
22#if HAVE_CONFIG_H
23#  include <config.h>
24#endif
25
26#if HAVE_INTTYPES_H
27#  include <inttypes.h>
28#endif
29
30#if HAVE_STDLIB_H
31#  include <stdlib.h>
32#endif
33
34#include <stdc.h>
35
36/* Verify a requirement at compile-time (unlike assert, which is runtime).  */
37#define verify(name, assertion) struct name { char a[(assertion) ? 1 : -1]; }
38
39#ifndef HAVE_DECL_STRTOUL
40"this configure-time declaration test was not run"
41#endif
42#if !HAVE_DECL_STRTOUL
43extern unsigned long strtoul __P((const char *, char **, int));
44#endif
45
46#ifndef HAVE_DECL_STRTOULL
47"this configure-time declaration test was not run"
48#endif
49#if !HAVE_DECL_STRTOULL && HAVE_UNSIGNED_LONG_LONG
50extern unsigned long long strtoull __P((const char *, char **, int));
51#endif
52
53#ifdef strtoumax
54#undef strtoumax
55#endif
56
57uintmax_t
58strtoumax (ptr, endptr, base)
59     const char *ptr;
60     char **endptr;
61     int base;
62{
63#if HAVE_UNSIGNED_LONG_LONG
64  verify (size_is_that_of_unsigned_long_or_unsigned_long_long,
65	  (sizeof (uintmax_t) == sizeof (unsigned long) ||
66	   sizeof (uintmax_t) == sizeof (unsigned long long)));
67
68  if (sizeof (uintmax_t) != sizeof (unsigned long))
69    return (strtoull (ptr, endptr, base));
70#else
71  verify (size_is_that_of_unsigned_long, sizeof (uintmax_t) == sizeof (unsigned long));
72#endif
73
74  return (strtoul (ptr, endptr, base));
75}
76
77#ifdef TESTING
78# include <stdio.h>
79int
80main ()
81{
82  char *p, *endptr;
83  uintmax_t x;
84#if HAVE_UNSIGNED_LONG_LONG
85  unsigned long long y;
86#endif
87  unsigned long z;
88
89  printf ("sizeof uintmax_t: %d\n", sizeof (uintmax_t));
90
91#if HAVE_UNSIGNED_LONG_LONG
92  printf ("sizeof unsigned long long: %d\n", sizeof (unsigned long long));
93#endif
94  printf ("sizeof unsigned long: %d\n", sizeof (unsigned long));
95
96  x = strtoumax("42", &endptr, 10);
97#if HAVE_LONG_LONG
98  y = strtoull("42", &endptr, 10);
99#else
100  y = 0;
101#endif
102  z = strtoul("42", &endptr, 10);
103
104  printf ("%llu %llu %lu\n", x, y, z);
105
106  exit (0);
107}
108#endif
109