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 [rescinded 22 July 1999]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
37 #ifdef HAVE_SYS_PARAM_H
38 #include <sys/param.h>
41 #ifdef NEED_DECLARATION_ERRNO
48 #include "safe-ctype.h"
51 #define ULONG_MAX ((unsigned long)(~0L)) /* 0xFFFFFFFF */
55 * Convert a string to an unsigned long integer.
57 * Ignores `locale' stuff. Assumes that the upper and lower case
58 * alphabets and digits are each contiguous.
61 strtoul(const char *nptr
, char **endptr
, register int base
)
63 register const char *s
= nptr
;
64 register unsigned long acc
;
66 register unsigned long cutoff
;
67 register int neg
= 0, any
, cutlim
;
70 * See strtol for comments as to the logic used.
80 if ((base
== 0 || base
== 16) &&
81 c
== '0' && (*s
== 'x' || *s
== 'X')) {
87 base
= c
== '0' ? 8 : 10;
88 cutoff
= (unsigned long)ULONG_MAX
/ (unsigned long)base
;
89 cutlim
= (unsigned long)ULONG_MAX
% (unsigned long)base
;
90 for (acc
= 0, any
= 0;; c
= *s
++) {
94 c
-= ISUPPER(c
) ? 'A' - 10 : 'a' - 10;
99 if (any
< 0 || acc
> cutoff
|| (acc
== cutoff
&& c
> cutlim
))
113 *endptr
= (char *) (any
? s
- 1 : nptr
);
This page took 0.031809 seconds and 4 git commands to generate.