summaryrefslogtreecommitdiff
path: root/lib/strtoimax.c
blob: cda6b44d0d875a64e85079e78e21f7a04e6cce94 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
/* Convert string representation of a number into an intmax_t value.
   Copyright 1999, 2001 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* Written by Paul Eggert. */

#if HAVE_CONFIG_H
# include <config.h>
#endif

#if HAVE_INTTYPES_H
# include <inttypes.h>
#endif

#if HAVE_STDLIB_H
# include <stdlib.h>
#endif

#ifndef PARAMS
# if defined PROTOTYPES || defined __STDC__
#  define PARAMS(Args) Args
# else
#  define PARAMS(Args) ()
# endif
#endif

/* Verify a requirement at compile-time (unlike assert, which is runtime).  */
#define verify(name, assertion) struct name { char a[(assertion) ? 1 : -1]; }

#ifdef UNSIGNED
# ifndef HAVE_DECL_STRTOUL
"this configure-time declaration test was not run"
# endif
# if !HAVE_DECL_STRTOUL
unsigned long strtoul PARAMS ((char const *, char **, int));
# endif
# ifndef HAVE_DECL_STRTOULL
"this configure-time declaration test was not run"
# endif
# if !HAVE_DECL_STRTOULL && HAVE_UNSIGNED_LONG_LONG
unsigned long long strtoull PARAMS ((char const *, char **, int));
# endif

#else

# ifndef HAVE_DECL_STRTOL
"this configure-time declaration test was not run"
# endif
# if !HAVE_DECL_STRTOL
long strtol PARAMS ((char const *, char **, int));
# endif
# ifndef HAVE_DECL_STRTOLL
"this configure-time declaration test was not run"
# endif
# if !HAVE_DECL_STRTOLL && HAVE_UNSIGNED_LONG_LONG
long long strtoll PARAMS ((char const *, char **, int));
# endif
#endif

#ifdef UNSIGNED
# define INT uintmax_t
# define strtoimax strtoumax
# define strtol strtoul
# define strtoll strtoull
#else
# define INT intmax_t
#endif

INT
strtoimax (char const *ptr, char **endptr, int base)
{
#if HAVE_UNSIGNED_LONG_LONG
  verify (size_is_that_of_long_or_long_long,
	  (sizeof (INT) == sizeof strtol (ptr, endptr, base)
	   || sizeof (INT) == sizeof strtoll (ptr, endptr, base)));

  if (sizeof (INT) != sizeof strtol (ptr, endptr, base))
    return strtoll (ptr, endptr, base);
#else
  verify (size_is_that_of_long,
	  sizeof (INT) == sizeof strtol (ptr, endptr, base));
#endif

  return strtol (ptr, endptr, base);
}