2 * Copyright (c) 1990 Regents of the University of California.
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. [rescinded 22 July 1999]
14 * 4. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 #define ULONG_MAX ((unsigned long)(~0L)) /* 0xFFFFFFFF */
44 * Convert a string to an unsigned long integer.
46 * Ignores `locale' stuff. Assumes that the upper and lower case
47 * alphabets and digits are each contiguous.
50 strtoul(nptr
, endptr
, base
)
55 register const char *s
= nptr
;
56 register unsigned long acc
;
58 register unsigned long cutoff
;
59 register int neg
= 0, any
, cutlim
;
62 * See strtol for comments as to the logic used.
72 if ((base
== 0 || base
== 16) &&
73 c
== '0' && (*s
== 'x' || *s
== 'X')) {
79 base
= c
== '0' ? 8 : 10;
80 cutoff
= (unsigned long)ULONG_MAX
/ (unsigned long)base
;
81 cutlim
= (unsigned long)ULONG_MAX
% (unsigned long)base
;
82 for (acc
= 0, any
= 0;; c
= *s
++) {
86 c
-= isupper(c
) ? 'A' - 10 : 'a' - 10;
91 if (any
< 0 || acc
> cutoff
|| (acc
== cutoff
&& c
> cutlim
))
105 *endptr
= (char *) (any
? s
- 1 : nptr
);
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