1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1988 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30#if	defined(_KERNEL) && !defined(_BOOT)
31#include <sys/errno.h>
32#else	/* _KERNEL && !_BOOT */
33#if	!defined(_BOOT) && !defined(_KMDB)
34#include "lint.h"
35#endif	/* !_BOOT && !_KMDB */
36#include <errno.h>
37#include <ctype.h>
38#include <limits.h>
39#include <stdlib.h>
40#endif	/* _KERNEL && !_BOOT */
41#include "strtolctype.h"
42#include <sys/types.h>
43
44#if	defined(_KERNEL) && !defined(_BOOT)
45int
46ddi_strtoll(const char *str, char **nptr, int base, longlong_t *result)
47#else	/* _KERNEL && !_BOOT */
48longlong_t
49strtoll(const char *str, char **nptr, int base)
50#endif	/* _KERNEL && !_BOOT */
51{
52	longlong_t val;
53	int c;
54	int xx;
55	int neg = 0;
56	longlong_t multmin;
57	longlong_t limit;
58	const char **ptr = (const char **)nptr;
59	const unsigned char *ustr = (const unsigned char *)str;
60
61	if (ptr != (const char **)0)
62		*ptr = (char *)ustr; /* in case no number is formed */
63	if (base < 0 || base > MBASE || base == 1) {
64		/* base is invalid -- should be a fatal error */
65#if	defined(_KERNEL) && !defined(_BOOT)
66		return (EINVAL);
67#else	/* _KERNEL && !_BOOT */
68		errno = EINVAL;
69		return (0);
70#endif	/* _KERNEL && !_BOOT */
71	}
72	if (!isalnum(c = *ustr)) {
73		while (isspace(c))
74			c = *++ustr;
75		switch (c) {
76		case '-':
77			neg++;
78			/* FALLTHROUGH */
79		case '+':
80			c = *++ustr;
81		}
82	}
83	if (base == 0)
84		if (c != '0')
85			base = 10;
86		else if (ustr[1] == 'x' || ustr[1] == 'X')
87			base = 16;
88		else
89			base = 8;
90	/*
91	 * for any base > 10, the digits incrementally following
92	 *	9 are assumed to be "abc...z" or "ABC...Z"
93	 */
94	if (!lisalnum(c) || (xx = DIGIT(c)) >= base) {
95		/* no number formed */
96#if	defined(_KERNEL) && !defined(_BOOT)
97		return (EINVAL);
98#else	/* _KERNEL && !_BOOT */
99		return (0);
100#endif	/* _KERNEL && !_BOOT */
101	}
102	if (base == 16 && c == '0' && (ustr[1] == 'x' || ustr[1] == 'X') &&
103	    isxdigit(ustr[2]))
104		c = *(ustr += 2); /* skip over leading "0x" or "0X" */
105
106	/* this code assumes that abs(LLONG_MIN) >= abs(LLONG_MAX) */
107	if (neg)
108		limit = LLONG_MIN;
109	else
110		limit = -LLONG_MAX;
111	multmin = limit / (longlong_t)base;
112	val = -DIGIT(c);
113	for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; ) {
114		/* accumulate neg avoids surprises near LLONG_MAX */
115		if (val < multmin)
116			goto overflow;
117		val *= base;
118		if (val < limit + xx)
119			goto overflow;
120		val -= xx;
121		c = *++ustr;
122	}
123	if (ptr != (const char **)0)
124		*ptr = (char *)ustr;
125#if	defined(_KERNEL) && !defined(_BOOT)
126	*result = neg ? val : -val;
127	return (0);
128#else	/* _KERNEL && !_BOOT */
129	return (neg ? val : -val);
130#endif	/* _KERNEL && !_BOOT */
131
132overflow:
133	for (c = *++ustr; lisalnum(c) && (xx = DIGIT(c)) < base; (c = *++ustr))
134		;
135	if (ptr != (const char **)0)
136		*ptr = (char *)ustr;
137#if	defined(_KERNEL) && !defined(_BOOT)
138	return (ERANGE);
139#else	/* _KERNEL && !_BOOT */
140	errno = ERANGE;
141	return (neg ? LLONG_MIN : LLONG_MAX);
142#endif	/* _KERNEL && !_BOOT */
143}
144