[deliverable/binutils-gdb.git] / libiberty / strtoull.c

/*
 * Copyright (c) 2014 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. [rescinded 22 July 1999]
 * 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#include <errno.h>
#ifdef NEED_DECLARATION_ERRNO
extern int errno;
#endif
#if 0
#include <stdlib.h>
#endif
#include "ansidecl.h"
#include "safe-ctype.h"

#ifdef HAVE_LONG_LONG

__extension__
typedef unsigned long long ullong_type;

#ifndef ULLONG_MAX
#define ULLONG_MAX (~(ullong_type)0) /* 0xFFFFFFFFFFFFFFFF */
#endif

/*
 * Convert a string to an unsigned long long integer.
 *
 * Ignores `locale' stuff.  Assumes that the upper and lower case
 * alphabets and digits are each contiguous.
 */
ullong_type
strtoull(const char *nptr, char **endptr, register int base)
{
	register const char *s = nptr;
	register ullong_type acc;
	register int c;
	register ullong_type cutoff;
	register int neg = 0, any, cutlim;

	/*
	 * See strtol for comments as to the logic used.
	 */
	do {
		c = *s++;
	} while (ISSPACE(c));
	if (c == '-') {
		neg = 1;
		c = *s++;
	} else 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 = (ullong_type)ULLONG_MAX / (ullong_type)base;
	cutlim = (ullong_type)ULLONG_MAX % (ullong_type)base;
	for (acc = 0, any = 0;; c = *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 || 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 (neg)
		acc = -acc;
	if (endptr != 0)
		*endptr = (char *) (any ? s - 1 : nptr);
	return (acc);
}

#endif /* ifdef HAVE_LONG_LONG */
Commit	Line	Data
abdef8eb JBG	1	/*
	2	* Copyright (c) 2014 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	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.
	17	*
	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
	28	* SUCH DAMAGE.
	29	*/
	30
	31	#ifdef HAVE_CONFIG_H
	32	#include "config.h"
	33	#endif
	34	#ifdef HAVE_LIMITS_H
	35	#include <limits.h>
	36	#endif
	37	#ifdef HAVE_SYS_PARAM_H
	38	#include <sys/param.h>
	39	#endif
	40	#include <errno.h>
	41	#ifdef NEED_DECLARATION_ERRNO
	42	extern int errno;
	43	#endif
	44	#if 0
	45	#include <stdlib.h>
	46	#endif
	47	#include "ansidecl.h"
	48	#include "safe-ctype.h"
	49
	50	#ifdef HAVE_LONG_LONG
	51
	52	__extension__
	53	typedef unsigned long long ullong_type;
	54
	55	#ifndef ULLONG_MAX
	56	#define ULLONG_MAX (~(ullong_type)0) /* 0xFFFFFFFFFFFFFFFF */
	57	#endif
	58
	59	/*
	60	* Convert a string to an unsigned long long integer.
	61	*
	62	* Ignores `locale' stuff. Assumes that the upper and lower case
	63	* alphabets and digits are each contiguous.
	64	*/
65	ullong_type
66	strtoull(const char nptr, char *endptr, register int base)
67	{
68	register const char *s = nptr;
69	register ullong_type acc;
70	register int c;
71	register ullong_type cutoff;
72	register int neg = 0, any, cutlim;
73
74	/*
75	* See strtol for comments as to the logic used.
76	*/
77	do {
78	c = *s++;
79	} while (ISSPACE(c));
80	if (c == '-') {
81	neg = 1;
82	c = *s++;
83	} else if (c == '+')
84	c = *s++;
85	if ((base == 0 \|\| base == 16) &&
86	c == '0' && (s == 'x' \|\| s == 'X')) {
87	c = s[1];
88	s += 2;
89	base = 16;
90	}
91	if (base == 0)
92	base = c == '0' ? 8 : 10;
93	cutoff = (ullong_type)ULLONG_MAX / (ullong_type)base;
94	cutlim = (ullong_type)ULLONG_MAX % (ullong_type)base;
95	for (acc = 0, any = 0;; c = *s++) {
96	if (ISDIGIT(c))
97	c -= '0';
98	else if (ISALPHA(c))
99	c -= ISUPPER(c) ? 'A' - 10 : 'a' - 10;
100	else
101	break;
102	if (c >= base)
103	break;
104	if (any < 0 \|\| acc > cutoff \|\| (acc == cutoff && c > cutlim))
105	any = -1;
106	else {
107	any = 1;
108	acc *= base;
109	acc += c;
110	}
111	}
112	if (any < 0) {
113	acc = ULLONG_MAX;
114	errno = ERANGE;
115	} else if (neg)
116	acc = -acc;
117	if (endptr != 0)
118	endptr = (char ) (any ? s - 1 : nptr);
119	return (acc);
120	}
121
122	#endif /* ifdef HAVE_LONG_LONG */