/*- * Copyright (c) 1992, 1993 *	The 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. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 4. 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 <limits.h>#include <errno.h>#include <ctype.h>#include <stdlib.h> /* * Convert a string to an unsigned long long integer. * * Assumes that the upper and lower case * alphabets and digits are each contiguous. */unsigned long longstrtoull(const char * __restrict nptr, char ** __restrict endptr, int base){	const char *s;	unsigned long long acc;	char c;	unsigned long long cutoff;	int neg, any, cutlim; 	/*	 * See strtoq for comments as to the logic used.	 */	s = nptr;	do {		c = *s++;	} while (isspace((unsigned char)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') &&	    ((s[1] >= '0' && s[1] <= '9') ||	    (s[1] >= 'A' && s[1] <= 'F') ||	    (s[1] >= 'a' && s[1] <= 'f'))) {		c = s[1];		s += 2;		base = 16;	}	if (base == 0)		base = c == '0' ? 8 : 10;	acc = any = 0;	if (base < 2 || base > 36)		goto noconv; 	cutoff = ULLONG_MAX / base;	cutlim = ULLONG_MAX % base;	for ( ; ; c = *s++) {		if (c >= '0' && c <= '9')			c -= '0';		else if (c >= 'A' && c <= 'Z')			c -= 'A' - 10;		else if (c >= 'a' && c <= 'z')			c -= 'a' - 10;		else			break;		if (c >= base)			break;		if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))			any = -1;		else {			any = 1;			acc *= base;			acc += c;		}	}	if (any < 0) {		acc = ULLONG_MAX;		errno = ERANGE;	} else if (!any) {noconv:		errno = EINVAL;	} else if (neg)		acc = -acc;	if (endptr != NULL)		*endptr = (char *)(any ? s - 1 : nptr);	return (acc);}