17c478bd9Sstevel@tonic-gate #if defined(LIBC_SCCS) && !defined(lint)
27c478bd9Sstevel@tonic-gate static const char sccsid[] = "@(#)strtoul.c 8.1 (Berkeley) 6/4/93";
3*9525b14bSRao Shoaib static const char rcsid[] = "$Id: strtoul.c,v 1.4 2008/02/18 03:49:08 marka Exp $";
47c478bd9Sstevel@tonic-gate #endif /* LIBC_SCCS and not lint */
57c478bd9Sstevel@tonic-gate
67c478bd9Sstevel@tonic-gate /*
77c478bd9Sstevel@tonic-gate * Copyright (c) 1990, 1993
87c478bd9Sstevel@tonic-gate * The Regents of the University of California. All rights reserved.
97c478bd9Sstevel@tonic-gate *
107c478bd9Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
117c478bd9Sstevel@tonic-gate * modification, are permitted provided that the following conditions
127c478bd9Sstevel@tonic-gate * are met:
137c478bd9Sstevel@tonic-gate * 1. Redistributions of source code must retain the above copyright
147c478bd9Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
157c478bd9Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
167c478bd9Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
177c478bd9Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
187c478bd9Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software
197c478bd9Sstevel@tonic-gate * must display the following acknowledgement:
207c478bd9Sstevel@tonic-gate * This product includes software developed by the University of
217c478bd9Sstevel@tonic-gate * California, Berkeley and its contributors.
227c478bd9Sstevel@tonic-gate * 4. Neither the name of the University nor the names of its contributors
237c478bd9Sstevel@tonic-gate * may be used to endorse or promote products derived from this software
247c478bd9Sstevel@tonic-gate * without specific prior written permission.
257c478bd9Sstevel@tonic-gate *
267c478bd9Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
277c478bd9Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
287c478bd9Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
297c478bd9Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
307c478bd9Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
317c478bd9Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
327c478bd9Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
337c478bd9Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
347c478bd9Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
357c478bd9Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
367c478bd9Sstevel@tonic-gate * SUCH DAMAGE.
377c478bd9Sstevel@tonic-gate */
387c478bd9Sstevel@tonic-gate
397c478bd9Sstevel@tonic-gate #include "port_before.h"
407c478bd9Sstevel@tonic-gate
417c478bd9Sstevel@tonic-gate #include <sys/types.h>
427c478bd9Sstevel@tonic-gate #include <sys/param.h>
437c478bd9Sstevel@tonic-gate
447c478bd9Sstevel@tonic-gate #include <ctype.h>
457c478bd9Sstevel@tonic-gate #include <errno.h>
467c478bd9Sstevel@tonic-gate #include <limits.h>
477c478bd9Sstevel@tonic-gate #include <stdlib.h>
487c478bd9Sstevel@tonic-gate
497c478bd9Sstevel@tonic-gate #include "port_after.h"
507c478bd9Sstevel@tonic-gate
517c478bd9Sstevel@tonic-gate #ifndef NEED_STRTOUL
527c478bd9Sstevel@tonic-gate int __strtoul_unneeded__;
537c478bd9Sstevel@tonic-gate #else
547c478bd9Sstevel@tonic-gate
55*9525b14bSRao Shoaib /*%
567c478bd9Sstevel@tonic-gate * Convert a string to an unsigned long integer.
577c478bd9Sstevel@tonic-gate *
587c478bd9Sstevel@tonic-gate * Ignores `locale' stuff. Assumes that the upper and lower case
597c478bd9Sstevel@tonic-gate * alphabets and digits are each contiguous.
607c478bd9Sstevel@tonic-gate */
617c478bd9Sstevel@tonic-gate u_long
strtoul(const char * nptr,char ** endptr,int base)627c478bd9Sstevel@tonic-gate strtoul(const char *nptr, char **endptr, int base) {
637c478bd9Sstevel@tonic-gate const char *s = nptr;
647c478bd9Sstevel@tonic-gate u_long acc, cutoff;
657c478bd9Sstevel@tonic-gate int neg, c, any, cutlim;
667c478bd9Sstevel@tonic-gate
677c478bd9Sstevel@tonic-gate neg = 0;
687c478bd9Sstevel@tonic-gate
697c478bd9Sstevel@tonic-gate /*
707c478bd9Sstevel@tonic-gate * See strtol for comments as to the logic used.
717c478bd9Sstevel@tonic-gate */
727c478bd9Sstevel@tonic-gate do {
73*9525b14bSRao Shoaib c = *(const unsigned char *)s++;
747c478bd9Sstevel@tonic-gate } while (isspace(c));
757c478bd9Sstevel@tonic-gate if (c == '-') {
767c478bd9Sstevel@tonic-gate neg = 1;
777c478bd9Sstevel@tonic-gate c = *s++;
787c478bd9Sstevel@tonic-gate } else if (c == '+')
797c478bd9Sstevel@tonic-gate c = *s++;
807c478bd9Sstevel@tonic-gate if ((base == 0 || base == 16) &&
817c478bd9Sstevel@tonic-gate c == '0' && (*s == 'x' || *s == 'X')) {
827c478bd9Sstevel@tonic-gate c = s[1];
837c478bd9Sstevel@tonic-gate s += 2;
847c478bd9Sstevel@tonic-gate base = 16;
857c478bd9Sstevel@tonic-gate }
867c478bd9Sstevel@tonic-gate if (base == 0)
877c478bd9Sstevel@tonic-gate base = c == '0' ? 8 : 10;
887c478bd9Sstevel@tonic-gate cutoff = (u_long)ULONG_MAX / (u_long)base;
897c478bd9Sstevel@tonic-gate cutlim = (u_long)ULONG_MAX % (u_long)base;
90*9525b14bSRao Shoaib for (acc = 0, any = 0;; c = *(const unsigned char*)s++) {
917c478bd9Sstevel@tonic-gate if (isdigit(c))
927c478bd9Sstevel@tonic-gate c -= '0';
937c478bd9Sstevel@tonic-gate else if (isalpha(c))
947c478bd9Sstevel@tonic-gate c -= isupper(c) ? 'A' - 10 : 'a' - 10;
957c478bd9Sstevel@tonic-gate else
967c478bd9Sstevel@tonic-gate break;
977c478bd9Sstevel@tonic-gate if (c >= base)
987c478bd9Sstevel@tonic-gate break;
99*9525b14bSRao Shoaib if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
1007c478bd9Sstevel@tonic-gate any = -1;
1017c478bd9Sstevel@tonic-gate else {
1027c478bd9Sstevel@tonic-gate any = 1;
1037c478bd9Sstevel@tonic-gate acc *= base;
1047c478bd9Sstevel@tonic-gate acc += c;
1057c478bd9Sstevel@tonic-gate }
1067c478bd9Sstevel@tonic-gate }
1077c478bd9Sstevel@tonic-gate if (any < 0) {
1087c478bd9Sstevel@tonic-gate acc = ULONG_MAX;
1097c478bd9Sstevel@tonic-gate errno = ERANGE;
1107c478bd9Sstevel@tonic-gate } else if (neg)
1117c478bd9Sstevel@tonic-gate acc = -acc;
1127c478bd9Sstevel@tonic-gate if (endptr != 0)
113*9525b14bSRao Shoaib DE_CONST((any ? s - 1 : nptr), *endptr);
1147c478bd9Sstevel@tonic-gate return (acc);
1157c478bd9Sstevel@tonic-gate }
1167c478bd9Sstevel@tonic-gate
1177c478bd9Sstevel@tonic-gate #endif /*NEED_STRTOUL*/
118*9525b14bSRao Shoaib
119*9525b14bSRao Shoaib /*! \file */
120