Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/stdlib/strtoul.c	Lines:	27	39	69.2 %
Date:	2017-11-07	Branches:	21	38	55.3 %


/*	$OpenBSD: strtoul.c,v 1.11 2017/07/06 16:23:11 millert Exp $ */
/*
 * Copyright (c) 1990 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. 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 <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(const char *nptr, char **endptr, int base)
{
	const char *s;
	unsigned long acc, cutoff;
	int c;
	int neg, any, cutlim;

	/*
	 * See strtol for comments as to the logic used.
	 */
	if (base < 0 || base == 1 || base > 36) {
		if (endptr != 0)
			*endptr = (char *)nptr;
		errno = EINVAL;
		return 0;
	}

	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') && isxdigit((unsigned char)s[1])) {
		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);
}
DEF_STRONG(strtoul);


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: strtoul.c,v 1.11 2017/07/06 16:23:11 millert Exp $ */
2			/*
3			* Copyright (c) 1990 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 <ctype.h>
32			#include <errno.h>
33			#include <limits.h>
34			#include <stdlib.h>
35
36			/*
37			* Convert a string to an unsigned long integer.
38			*
39			* Ignores `locale' stuff. Assumes that the upper and lower case
40			* alphabets and digits are each contiguous.
41			*/
42			unsigned long
43			strtoul(const char nptr, char *endptr, int base)
44			{
45			const char *s;
46			unsigned long acc, cutoff;
47			int c;
48			int neg, any, cutlim;
49
50			/*
51			* See strtol for comments as to the logic used.
52			*/
53	✗✓	26994	if (base < 0 \|\| base == 1 \|\| base > 36) {
54			if (endptr != 0)
55			endptr = (char )nptr;
56			errno = EINVAL;
57			return 0;
58			}
59
60			s = nptr;
61		13497	do {
62		13497	c = (unsigned char) *s++;
63	✗✓	13497	} while (isspace(c));
64	✗✓	13497	if (c == '-') {
65			neg = 1;
66			c = *s++;
67			} else {
68			neg = 0;
69	✗✓	13497	if (c == '+')
70			c = *s++;
71			}
72	✓✓✗✗	13497	if ((base == 0 \|\| base == 16) && c == '0' &&
73	✓✗✗✓	12	(s == 'x' \|\| s == 'X') && isxdigit((unsigned char)s[1])) {
74			c = s[1];
75			s += 2;
76			base = 16;
77			}
78	✓✓	13497	if (base == 0)
79		830	base = c == '0' ? 8 : 10;
80
81		13497	cutoff = ULONG_MAX / (unsigned long)base;
82		13497	cutlim = ULONG_MAX % (unsigned long)base;
83		38433	for (acc = 0, any = 0;; c = (unsigned char) *s++) {
84	✓✓	38433	if (isdigit(c))
85		24936	c -= '0';
86	✓✓	13497	else if (isalpha(c))
87		208	c -= isupper(c) ? 'A' - 10 : 'a' - 10;
88			else
89			break;
90	✓✓	25144	if (c >= base)
91			break;
92	✓✗	24936	if (any < 0)
93			continue;
94	✓✗✗✓ ✗✗	49872	if (acc > cutoff \|\| (acc == cutoff && c > cutlim)) {
95			any = -1;
96			acc = ULONG_MAX;
97			errno = ERANGE;
98			} else {
99			any = 1;
100		24936	acc *= (unsigned long)base;
101		24936	acc += c;
102			}
103			}
104	✗✓	13497	if (neg && any > 0)
105			acc = -acc;
106	✓✗	13497	if (endptr != 0)
107		13497	endptr = (char ) (any ? s - 1 : nptr);
108		13497	return (acc);
109		13497	}
110			DEF_STRONG(strtoul);