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1 | /* Convert string representation of a number into an uintmax_t value. |
2 | Copyright 1999, 2001 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 | |
41 | extern 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 | |
48 | extern unsigned long long strtoull __P((const char *, char **, int)); | |
49 | #endif | |
50 | ||
51 | uintmax_t | |
52 | strtoumax (ptr, endptr, base) | |
53 | const char *ptr; | |
54 | char **endptr; | |
55 | int base; | |
56 | { | |
57 | #if HAVE_UNSIGNED_LONG_LONG | |
58 | verify (size_is_that_of_unsigned_long_or_unsigned_long_long, | |
59 | (sizeof (uintmax_t) == sizeof (unsigned long) || | |
60 | sizeof (uintmax_t) == sizeof (unsigned long long))); | |
61 | ||
62 | if (sizeof (uintmax_t) != sizeof (unsigned long)) | |
63 | return (strtoull (ptr, endptr, base)); | |
64 | #else | |
65 | verify (size_is_that_of_unsigned_long, sizeof (uintmax_t) == sizeof (unsigned long)); | |
66 | #endif | |
67 | ||
68 | return (strtoul (ptr, endptr, base)); | |
69 | } | |
70 | ||
71 | #ifdef TESTING | |
72 | # include <stdio.h> | |
73 | int | |
74 | main () | |
75 | { | |
76 | char *p, *endptr; | |
77 | uintmax_t x; | |
78 | #if HAVE_UNSIGNED_LONG_LONG | |
79 | unsigned long long y; | |
80 | #endif | |
81 | unsigned long z; | |
82 | ||
83 | printf ("sizeof uintmax_t: %d\n", sizeof (uintmax_t)); | |
84 | ||
85 | #if HAVE_UNSIGNED_LONG_LONG | |
86 | printf ("sizeof unsigned long long: %d\n", sizeof (unsigned long long)); | |
87 | #endif | |
88 | printf ("sizeof unsigned long: %d\n", sizeof (unsigned long)); | |
89 | ||
90 | x = strtoumax("42", &endptr, 10); | |
91 | #if HAVE_LONG_LONG | |
92 | y = strtoull("42", &endptr, 10); | |
93 | #else | |
94 | y = 0; | |
95 | #endif | |
96 | z = strtoul("42", &endptr, 10); | |
97 | ||
98 | printf ("%llu %llu %lu\n", x, y, z); | |
99 | ||
100 | exit (0); | |
101 | } | |
102 | #endif |