2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include "port_before.h"
36 #include <sys/types.h>
37 #include <sys/param.h>
44 #include "port_after.h"
47 int __strtoul_unneeded__
;
51 * Convert a string to an unsigned long integer.
53 * Ignores `locale' stuff. Assumes that the upper and lower case
54 * alphabets and digits are each contiguous.
57 strtoul(const char *nptr
, char **endptr
, int base
) {
60 int neg
, c
, any
, cutlim
;
65 * See strtol for comments as to the logic used.
68 c
= *(const unsigned char *)s
++;
75 if ((base
== 0 || base
== 16) &&
76 c
== '0' && (*s
== 'x' || *s
== 'X')) {
82 base
= c
== '0' ? 8 : 10;
83 cutoff
= (u_long
)ULONG_MAX
/ (u_long
)base
;
84 cutlim
= (u_long
)ULONG_MAX
% (u_long
)base
;
85 for (acc
= 0, any
= 0;; c
= *(const unsigned char*)s
++) {
89 c
-= isupper(c
) ? 'A' - 10 : 'a' - 10;
94 if (any
< 0 || acc
> cutoff
|| (acc
== cutoff
&& c
> cutlim
))
108 DE_CONST((any
? s
- 1 : nptr
), *endptr
);
112 #endif /*NEED_STRTOUL*/