Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/stdlib/strtoll.c	Lines:	28	49	57.1 %
Date:	2017-11-07	Branches:	19	48	39.6 %


/*	$OpenBSD: strtoll.c,v 1.10 2017/07/06 16:23:11 millert Exp $ */
/*
 * Copyright (c) 1992 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 <sys/types.h>

#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdlib.h>

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

	/*
	 * Ensure that base is between 2 and 36 inclusive, or the special
	 * value of 0.
	 */
	if (base < 0 || base == 1 || base > 36) {
		if (endptr != 0)
			*endptr = (char *)nptr;
		errno = EINVAL;
		return 0;
	}

	/*
	 * Skip white space and pick up leading +/- sign if any.
	 * If base is 0, allow 0x for hex and 0 for octal, else
	 * assume decimal; if base is already 16, allow 0x.
	 */
	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;

	/*
	 * Compute the cutoff value between legal numbers and illegal
	 * numbers.  That is the largest legal value, divided by the
	 * base.  An input number that is greater than this value, if
	 * followed by a legal input character, is too big.  One that
	 * is equal to this value may be valid or not; the limit
	 * between valid and invalid numbers is then based on the last
	 * digit.  For instance, if the range for long longs is
	 * [-9223372036854775808..9223372036854775807] and the input base
	 * is 10, cutoff will be set to 922337203685477580 and cutlim to
	 * either 7 (neg==0) or 8 (neg==1), meaning that if we have
	 * accumulated a value > 922337203685477580, or equal but the
	 * next digit is > 7 (or 8), the number is too big, and we will
	 * return a range error.
	 *
	 * Set any if any `digits' consumed; make it negative to indicate
	 * overflow.
	 */
	cutoff = neg ? LLONG_MIN : LLONG_MAX;
	cutlim = cutoff % base;
	cutoff /= base;
	if (neg) {
		if (cutlim > 0) {
			cutlim -= base;
			cutoff += 1;
		}
		cutlim = -cutlim;
	}
	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 (neg) {
			if (acc < cutoff || (acc == cutoff && c > cutlim)) {
				any = -1;
				acc = LLONG_MIN;
				errno = ERANGE;
			} else {
				any = 1;
				acc *= base;
				acc -= c;
			}
		} else {
			if (acc > cutoff || (acc == cutoff && c > cutlim)) {
				any = -1;
				acc = LLONG_MAX;
				errno = ERANGE;
			} else {
				any = 1;
				acc *= base;
				acc += c;
			}
		}
	}
	if (endptr != 0)
		*endptr = (char *) (any ? s - 1 : nptr);
	return (acc);
}
DEF_STRONG(strtoll);

__weak_alias(strtoq, strtoll);


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: strtoll.c,v 1.10 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 a long long.
40			*
41			* Ignores `locale' stuff. Assumes that the upper and lower case
42			* alphabets and digits are each contiguous.
43			*/
44			long long
45			strtoll(const char nptr, char *endptr, int base)
46			{
47			const char *s;
48			long long acc, cutoff;
49			int c;
50			int neg, any, cutlim;
51
52			/*
53			* Ensure that base is between 2 and 36 inclusive, or the special
54			* value of 0.
55			*/
56	✗✓	3424	if (base < 0 \|\| base == 1 \|\| base > 36) {
57			if (endptr != 0)
58			endptr = (char )nptr;
59			errno = EINVAL;
60			return 0;
61			}
62
63			/*
64			* Skip white space and pick up leading +/- sign if any.
65			* If base is 0, allow 0x for hex and 0 for octal, else
66			* assume decimal; if base is already 16, allow 0x.
67			*/
68			s = nptr;
69		1712	do {
70		1712	c = (unsigned char) *s++;
71	✗✓	1712	} while (isspace(c));
72	✗✓	1712	if (c == '-') {
73			neg = 1;
74			c = *s++;
75			} else {
76			neg = 0;
77	✗✓	1712	if (c == '+')
78			c = *s++;
79			}
80	✗✓✗✗	1712	if ((base == 0 \|\| base == 16) && c == '0' &&
81			(s == 'x' \|\| s == 'X') && isxdigit((unsigned char)s[1])) {
82			c = s[1];
83			s += 2;
84			base = 16;
85			}
86	✓✓	1712	if (base == 0)
87		412	base = c == '0' ? 8 : 10;
88
89			/*
90			* Compute the cutoff value between legal numbers and illegal
91			* numbers. That is the largest legal value, divided by the
92			* base. An input number that is greater than this value, if
93			* followed by a legal input character, is too big. One that
94			* is equal to this value may be valid or not; the limit
95			* between valid and invalid numbers is then based on the last
96			* digit. For instance, if the range for long longs is
97			* [-9223372036854775808..9223372036854775807] and the input base
98			* is 10, cutoff will be set to 922337203685477580 and cutlim to
99			* either 7 (neg==0) or 8 (neg==1), meaning that if we have
100			* accumulated a value > 922337203685477580, or equal but the
101			* next digit is > 7 (or 8), the number is too big, and we will
102			* return a range error.
103			*
104			* Set any if any `digits' consumed; make it negative to indicate
105			* overflow.
106			*/
107		1712	cutoff = neg ? LLONG_MIN : LLONG_MAX;
108		1712	cutlim = cutoff % base;
109		1712	cutoff /= base;
110	✗✓	1712	if (neg) {
111			if (cutlim > 0) {
112			cutlim -= base;
113			cutoff += 1;
114			}
115			cutlim = -cutlim;
116			}
117		5271	for (acc = 0, any = 0;; c = (unsigned char) *s++) {
118	✓✓	5271	if (isdigit(c))
119		3559	c -= '0';
120	✓✓	1712	else if (isalpha(c))
121		2	c -= isupper(c) ? 'A' - 10 : 'a' - 10;
122			else
123			break;
124	✓✓	3561	if (c >= base)
125			break;
126	✓✗	3559	if (any < 0)
127			continue;
128	✗✓	3559	if (neg) {
129			if (acc < cutoff \|\| (acc == cutoff && c > cutlim)) {
130			any = -1;
131			acc = LLONG_MIN;
132			errno = ERANGE;
133			} else {
134			any = 1;
135			acc *= base;
136			acc -= c;
137			}
138			} else {
139	✓✗✗✓ ✗✗	7118	if (acc > cutoff \|\| (acc == cutoff && c > cutlim)) {
140			any = -1;
141			acc = LLONG_MAX;
142			errno = ERANGE;
143			} else {
144			any = 1;
145		3559	acc *= base;
146		3559	acc += c;
147			}
148			}
149			}
150	✓✗	1712	if (endptr != 0)
151		1712	endptr = (char ) (any ? s - 1 : nptr);
152		1712	return (acc);
153		1712	}
154			DEF_STRONG(strtoll);
155
156			__weak_alias(strtoq, strtoll);