1/* Convert string representation of a number into an intmax_t value.
2   Copyright (C) 1999, 2001, 2002, 2003 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#elif HAVE_STDINT_H
27# include <stdint.h>
28#endif
29
30#include <stdlib.h>
31
32/* Verify a requirement at compile-time (unlike assert, which is runtime).  */
33#define verify(name, assertion) struct name { char a[(assertion) ? 1 : -1]; }
34
35#ifdef UNSIGNED
36# ifndef HAVE_DECL_STRTOULL
37"this configure-time declaration test was not run"
38# endif
39# if !HAVE_DECL_STRTOULL && HAVE_UNSIGNED_LONG_LONG
40unsigned long long strtoull (char const *, char **, int);
41# endif
42
43#else
44
45# ifndef HAVE_DECL_STRTOLL
46"this configure-time declaration test was not run"
47# endif
48# if !HAVE_DECL_STRTOLL && HAVE_UNSIGNED_LONG_LONG
49long long strtoll (char const *, char **, int);
50# endif
51#endif
52
53#ifdef UNSIGNED
54# undef HAVE_LONG_LONG
55# define HAVE_LONG_LONG HAVE_UNSIGNED_LONG_LONG
56# define INT uintmax_t
57# define strtoimax strtoumax
58# define strtol strtoul
59# define strtoll strtoull
60#else
61# define INT intmax_t
62#endif
63
64INT
65strtoimax (char const *ptr, char **endptr, int base)
66{
67#if HAVE_LONG_LONG
68  verify (size_is_that_of_long_or_long_long,
69	  (sizeof (INT) == sizeof (long)
70	   || sizeof (INT) == sizeof (long long)));
71
72  if (sizeof (INT) != sizeof (long))
73    return strtoll (ptr, endptr, base);
74#else
75  verify (size_is_that_of_long,
76	  sizeof (INT) == sizeof (long));
77#endif
78
79  return strtol (ptr, endptr, base);
80}
81