1/* Convert string representation of a number into an intmax_t value.
2
3   Copyright (C) 1999, 2001 Free Software Foundation, Inc.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 2, or (at your option)
8   any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program; if not, write to the Free Software Foundation,
17   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
18
19/* Written by Paul Eggert. */
20
21#if HAVE_CONFIG_H
22# include <config.h>
23#endif
24
25#if HAVE_INTTYPES_H
26# include <inttypes.h>
27#endif
28
29#if HAVE_STDLIB_H
30# include <stdlib.h>
31#endif
32
33#ifndef PARAMS
34# if defined PROTOTYPES || defined __STDC__
35#  define PARAMS(Args) Args
36# else
37#  define PARAMS(Args) ()
38# endif
39#endif
40
41/* Verify a requirement at compile-time (unlike assert, which is runtime).  */
42#define verify(name, assertion) struct name { char a[(assertion) ? 1 : -1]; }
43
44#ifdef UNSIGNED
45# ifndef HAVE_DECL_STRTOUL
46"this configure-time declaration test was not run"
47# endif
48# if !HAVE_DECL_STRTOUL
49unsigned long strtoul PARAMS ((char const *, char **, int));
50# endif
51# ifndef HAVE_DECL_STRTOULL
52"this configure-time declaration test was not run"
53# endif
54# if !HAVE_DECL_STRTOULL && HAVE_UNSIGNED_LONG_LONG
55unsigned long long strtoull PARAMS ((char const *, char **, int));
56# endif
57
58#else
59
60# ifndef HAVE_DECL_STRTOL
61"this configure-time declaration test was not run"
62# endif
63# if !HAVE_DECL_STRTOL
64long strtol PARAMS ((char const *, char **, int));
65# endif
66# ifndef HAVE_DECL_STRTOLL
67"this configure-time declaration test was not run"
68# endif
69# if !HAVE_DECL_STRTOLL && HAVE_UNSIGNED_LONG_LONG
70long long strtoll PARAMS ((char const *, char **, int));
71# endif
72#endif
73
74#ifdef UNSIGNED
75# undef HAVE_LONG_LONG
76# define HAVE_LONG_LONG HAVE_UNSIGNED_LONG_LONG
77# define INT uintmax_t
78# define strtoimax strtoumax
79# define strtol strtoul
80# define strtoll strtoull
81#else
82# define INT intmax_t
83#endif
84
85INT
86strtoimax (char const *ptr, char **endptr, int base)
87{
88#if HAVE_LONG_LONG
89  verify (size_is_that_of_long_or_long_long,
90	  (sizeof (INT) == sizeof (long)
91	   || sizeof (INT) == sizeof (long long)));
92
93  if (sizeof (INT) != sizeof (long))
94    return strtoll (ptr, endptr, base);
95#else
96  verify (size_is_that_of_long,
97	  sizeof (INT) == sizeof (long));
98#endif
99
100  return strtol (ptr, endptr, base);
101}
102