[gssapi-openssh.git] / openssh / openbsd-compat / strtoul.c

/* OPENBSD ORIGINAL: lib/libc/stdlib/strtoul.c */

/*
 * Copyright (c) 1990 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "includes.h"
#ifndef HAVE_STRTOUL

#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$OpenBSD: strtoul.c,v 1.5 2003/06/02 20:18:38 millert Exp $";
#endif /* LIBC_SCCS and not lint */

#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdlib.h>

/*
 * Convert a string to an unsigned long integer.
 *
 * Ignores `locale' stuff.  Assumes that the upper and lower case
 * alphabets and digits are each contiguous.
 */
unsigned long
strtoul(nptr, endptr, base)
	const char *nptr;
	char **endptr;
	register int base;
{
	register const char *s;
	register unsigned long acc, cutoff;
	register int c;
	register int neg, any, cutlim;

	/*
	 * See strtol for comments as to the logic used.
	 */
	s = nptr;
	do {
		c = (unsigned char) *s++;
	} while (isspace(c));
	if (c == '-') {
		neg = 1;
		c = *s++;
	} else {
		neg = 0;
		if (c == '+')
			c = *s++;
	}
	if ((base == 0 || base == 16) &&
	    c == '0' && (*s == 'x' || *s == 'X')) {
		c = s[1];
		s += 2;
		base = 16;
	}
	if (base == 0)
		base = c == '0' ? 8 : 10;

	cutoff = ULONG_MAX / (unsigned long)base;
	cutlim = ULONG_MAX % (unsigned long)base;
	for (acc = 0, any = 0;; c = (unsigned char) *s++) {
		if (isdigit(c))
			c -= '0';
		else if (isalpha(c))
			c -= isupper(c) ? 'A' - 10 : 'a' - 10;
		else
			break;
		if (c >= base)
			break;
		if (any < 0)
			continue;
		if (acc > cutoff || acc == cutoff && c > cutlim) {
			any = -1;
			acc = ULONG_MAX;
			errno = ERANGE;
		} else {
			any = 1;
			acc *= (unsigned long)base;
			acc += c;
		}
	}
	if (neg && any > 0)
		acc = -acc;
	if (endptr != 0)
		*endptr = (char *) (any ? s - 1 : nptr);
	return (acc);
}
#endif /* !HAVE_STRTOUL */
Commit	Line	Data
a6465d81	1	/* OPENBSD ORIGINAL: lib/libc/stdlib/strtoul.c */
	2
	3	/*
	4	* Copyright (c) 1990 Regents of the University of California.
	5	* All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	* 1. Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* 2. Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* 3. Neither the name of the University nor the names of its contributors
	16	* may be used to endorse or promote products derived from this software
	17	* without specific prior written permission.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	20	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	21	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	22	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	23	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	24	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	25	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	26	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	27	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	28	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	29	* SUCH DAMAGE.
	30	*/
	31
	32	#include "includes.h"
	33	#ifndef HAVE_STRTOUL
	34
	35	#if defined(LIBC_SCCS) && !defined(lint)
	36	static char *rcsid = "$OpenBSD: strtoul.c,v 1.5 2003/06/02 20:18:38 millert Exp $";
	37	#endif /* LIBC_SCCS and not lint */
	38
	39	#include <ctype.h>
	40	#include <errno.h>
	41	#include <limits.h>
	42	#include <stdlib.h>
	43
	44	/*
	45	* Convert a string to an unsigned long integer.
	46	*
	47	* Ignores `locale' stuff. Assumes that the upper and lower case
	48	* alphabets and digits are each contiguous.
	49	*/
	50	unsigned long
	51	strtoul(nptr, endptr, base)
	52	const char *nptr;
	53	char **endptr;
	54	register int base;
	55	{
	56	register const char *s;
	57	register unsigned long acc, cutoff;
	58	register int c;
	59	register int neg, any, cutlim;
	60
	61	/*
	62	* See strtol for comments as to the logic used.
	63	*/
	64	s = nptr;
65	do {
66	c = (unsigned char) *s++;
67	} while (isspace(c));
68	if (c == '-') {
69	neg = 1;
70	c = *s++;
71	} else {
72	neg = 0;
73	if (c == '+')
74	c = *s++;
75	}
76	if ((base == 0 \|\| base == 16) &&
77	c == '0' && (s == 'x' \|\| s == 'X')) {
78	c = s[1];
79	s += 2;
80	base = 16;
81	}
82	if (base == 0)
83	base = c == '0' ? 8 : 10;
84
85	cutoff = ULONG_MAX / (unsigned long)base;
86	cutlim = ULONG_MAX % (unsigned long)base;
87	for (acc = 0, any = 0;; c = (unsigned char) *s++) {
88	if (isdigit(c))
89	c -= '0';
90	else if (isalpha(c))
91	c -= isupper(c) ? 'A' - 10 : 'a' - 10;
92	else
93	break;
94	if (c >= base)
95	break;
96	if (any < 0)
97	continue;
98	if (acc > cutoff \|\| acc == cutoff && c > cutlim) {
99	any = -1;
100	acc = ULONG_MAX;
101	errno = ERANGE;
102	} else {
103	any = 1;
104	acc *= (unsigned long)base;
105	acc += c;
106	}
107	}
108	if (neg && any > 0)
109	acc = -acc;
110	if (endptr != 0)
111	endptr = (char ) (any ? s - 1 : nptr);
112	return (acc);
113	}
114	#endif /* !HAVE_STRTOUL */