GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/stdlib/strtoull.c Lines: 0 38 0.0 %
Date: 2017-11-13 Branches: 0 38 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: strtoull.c,v 1.9 2017/07/06 16:23:11 millert Exp $ */
2
/*
3
 * Copyright (c) 1992 The Regents of the University of California.
4
 * All rights reserved.
5
 *
6
 * Redistribution and use in source and binary forms, with or without
7
 * modification, are permitted provided that the following conditions
8
 * are met:
9
 * 1. Redistributions of source code must retain the above copyright
10
 *    notice, this list of conditions and the following disclaimer.
11
 * 2. Redistributions in binary form must reproduce the above copyright
12
 *    notice, this list of conditions and the following disclaimer in the
13
 *    documentation and/or other materials provided with the distribution.
14
 * 3. 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
#include <sys/types.h>
32
33
#include <ctype.h>
34
#include <errno.h>
35
#include <limits.h>
36
#include <stdlib.h>
37
38
/*
39
 * Convert a string to an unsigned long long.
40
 *
41
 * Ignores `locale' stuff.  Assumes that the upper and lower case
42
 * alphabets and digits are each contiguous.
43
 */
44
unsigned long long
45
strtoull(const char *nptr, char **endptr, int base)
46
{
47
	const char *s;
48
	unsigned long long acc, cutoff;
49
	int c;
50
	int neg, any, cutlim;
51
52
	/*
53
	 * See strtoll for comments as to the logic used.
54
	 */
55
	if (base < 0 || base == 1 || base > 36) {
56
		if (endptr != 0)
57
			*endptr = (char *)nptr;
58
		errno = EINVAL;
59
		return 0;
60
	}
61
62
	s = nptr;
63
	do {
64
		c = (unsigned char) *s++;
65
	} while (isspace(c));
66
	if (c == '-') {
67
		neg = 1;
68
		c = *s++;
69
	} else {
70
		neg = 0;
71
		if (c == '+')
72
			c = *s++;
73
	}
74
	if ((base == 0 || base == 16) && c == '0' &&
75
	    (*s == 'x' || *s == 'X') && isxdigit((unsigned char)s[1])) {
76
		c = s[1];
77
		s += 2;
78
		base = 16;
79
	}
80
	if (base == 0)
81
		base = c == '0' ? 8 : 10;
82
83
	cutoff = ULLONG_MAX / (unsigned long long)base;
84
	cutlim = ULLONG_MAX % (unsigned long long)base;
85
	for (acc = 0, any = 0;; c = (unsigned char) *s++) {
86
		if (isdigit(c))
87
			c -= '0';
88
		else if (isalpha(c))
89
			c -= isupper(c) ? 'A' - 10 : 'a' - 10;
90
		else
91
			break;
92
		if (c >= base)
93
			break;
94
		if (any < 0)
95
			continue;
96
		if (acc > cutoff || (acc == cutoff && c > cutlim)) {
97
			any = -1;
98
			acc = ULLONG_MAX;
99
			errno = ERANGE;
100
		} else {
101
			any = 1;
102
			acc *= (unsigned long long)base;
103
			acc += c;
104
		}
105
	}
106
	if (neg && any > 0)
107
		acc = -acc;
108
	if (endptr != 0)
109
		*endptr = (char *) (any ? s - 1 : nptr);
110
	return (acc);
111
}
112
DEF_STRONG(strtoull);
113
114
__weak_alias(strtouq, strtoull);