1 #if defined(LIBC_SCCS) && !defined(lint)
2 static const char sccsid[] = "@(#)strtoul.c 8.1 (Berkeley) 6/4/93";
3 static const char rcsid[] = "$Id: strtoul.c,v 1.1.2.1 2003/06/27 03:51:35 marka Exp $";
4 #endif /* LIBC_SCCS and not lint */
7 * Copyright (c) 1990, 1993
8 * The Regents of the University of California. All rights reserved.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 #include "port_before.h"
41 #include <sys/types.h>
42 #include <sys/param.h>
49 #include "port_after.h"
52 int __strtoul_unneeded__;
56 * Convert a string to an unsigned long integer.
58 * Ignores `locale' stuff. Assumes that the upper and lower case
59 * alphabets and digits are each contiguous.
62 strtoul(const char *nptr, char **endptr, int base) {
65 int neg, c, any, cutlim;
70 * See strtol for comments as to the logic used.
73 c = *(unsigned char *)s++;
80 if ((base == 0 || base == 16) &&
81 c == '0' && (*s == 'x' || *s == 'X')) {
87 base = c == '0' ? 8 : 10;
88 cutoff = (u_long)ULONG_MAX / (u_long)base;
89 cutlim = (u_long)ULONG_MAX % (u_long)base;
90 for (acc = 0, any = 0;; c = *(unsigned char*)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);
117 #endif /*NEED_STRTOUL*/