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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/stdlib/strtoimax.c	Lines:	0	48	0.0 %
Date:	2017-11-13	Branches:	0	48	0.0 %


/*	$OpenBSD: strtoimax.c,v 1.4 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 <ctype.h>
#include <errno.h>
#include <inttypes.h>

/*
 * Convert a string to an intmax_t
 *
 * Ignores `locale' stuff.  Assumes that the upper and lower case
 * alphabets and digits are each contiguous.
 */
intmax_t
strtoimax(const char *nptr, char **endptr, int base)
{
	const char *s;
	intmax_t 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 intmax_t 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 ? INTMAX_MIN : INTMAX_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 = INTMAX_MIN;
				errno = ERANGE;
			} else {
				any = 1;
				acc *= base;
				acc -= c;
			}
		} else {
			if (acc > cutoff || (acc == cutoff && c > cutlim)) {
				any = -1;
				acc = INTMAX_MAX;
				errno = ERANGE;
			} else {
				any = 1;
				acc *= base;
				acc += c;
			}
		}
	}
	if (endptr != 0)
		*endptr = (char *) (any ? s - 1 : nptr);
	return (acc);
}
DEF_STRONG(strtoimax);


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: strtoimax.c,v 1.4 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 <ctype.h>
32			#include <errno.h>
33			#include <inttypes.h>
34
35			/*
36			* Convert a string to an intmax_t
37			*
38			* Ignores `locale' stuff. Assumes that the upper and lower case
39			* alphabets and digits are each contiguous.
40			*/
41			intmax_t
42			strtoimax(const char nptr, char *endptr, int base)
43			{
44			const char *s;
45			intmax_t acc, cutoff;
46			int c;
47			int neg, any, cutlim;
48
49			/*
50			* Ensure that base is between 2 and 36 inclusive, or the special
51			* value of 0.
52			*/
53			if (base < 0 \|\| base == 1 \|\| base > 36) {
54			if (endptr != 0)
55			endptr = (char )nptr;
56			errno = EINVAL;
57			return 0;
58			}
59
60			/*
61			* Skip white space and pick up leading +/- sign if any.
62			* If base is 0, allow 0x for hex and 0 for octal, else
63			* assume decimal; if base is already 16, allow 0x.
64			*/
65			s = nptr;
66			do {
67			c = (unsigned char) *s++;
68			} while (isspace(c));
69			if (c == '-') {
70			neg = 1;
71			c = *s++;
72			} else {
73			neg = 0;
74			if (c == '+')
75			c = *s++;
76			}
77			if ((base == 0 \|\| base == 16) && c == '0' &&
78			(s == 'x' \|\| s == 'X') && isxdigit((unsigned char)s[1])) {
79			c = s[1];
80			s += 2;
81			base = 16;
82			}
83			if (base == 0)
84			base = c == '0' ? 8 : 10;
85
86			/*
87			* Compute the cutoff value between legal numbers and illegal
88			* numbers. That is the largest legal value, divided by the
89			* base. An input number that is greater than this value, if
90			* followed by a legal input character, is too big. One that
91			* is equal to this value may be valid or not; the limit
92			* between valid and invalid numbers is then based on the last
93			* digit. For instance, if the range for intmax_t is
94			* [-9223372036854775808..9223372036854775807] and the input base
95			* is 10, cutoff will be set to 922337203685477580 and cutlim to
96			* either 7 (neg==0) or 8 (neg==1), meaning that if we have
97			* accumulated a value > 922337203685477580, or equal but the
98			* next digit is > 7 (or 8), the number is too big, and we will
99			* return a range error.
100			*
101			* Set any if any `digits' consumed; make it negative to indicate
102			* overflow.
103			*/
104			cutoff = neg ? INTMAX_MIN : INTMAX_MAX;
105			cutlim = cutoff % base;
106			cutoff /= base;
107			if (neg) {
108			if (cutlim > 0) {
109			cutlim -= base;
110			cutoff += 1;
111			}
112			cutlim = -cutlim;
113			}
114			for (acc = 0, any = 0;; c = (unsigned char) *s++) {
115			if (isdigit(c))
116			c -= '0';
117			else if (isalpha(c))
118			c -= isupper(c) ? 'A' - 10 : 'a' - 10;
119			else
120			break;
121			if (c >= base)
122			break;
123			if (any < 0)
124			continue;
125			if (neg) {
126			if (acc < cutoff \|\| (acc == cutoff && c > cutlim)) {
127			any = -1;
128			acc = INTMAX_MIN;
129			errno = ERANGE;
130			} else {
131			any = 1;
132			acc *= base;
133			acc -= c;
134			}
135			} else {
136			if (acc > cutoff \|\| (acc == cutoff && c > cutlim)) {
137			any = -1;
138			acc = INTMAX_MAX;
139			errno = ERANGE;
140			} else {
141			any = 1;
142			acc *= base;
143			acc += c;
144			}
145			}
146			}
147			if (endptr != 0)
148			endptr = (char ) (any ? s - 1 : nptr);
149			return (acc);
150			}
151			DEF_STRONG(strtoimax);