20141031/libnetbsd/strtoll.c

/*      $NetBSD: strtoll.c,v 1.4 2005/05/16 11:27:58 lukem Exp $        */
/*      from    NetBSD: strtoll.c,v 1.6 2003/10/27 00:12:42 lukem Exp   */

/*-
 * Copyright (c) 1992, 1993
 *      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 "tnftp.h"

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

        /* endptr may be NULL */

#ifdef __GNUC__
        /* This outrageous construct just to shut up a GCC warning. */
        (void) &acc; (void) &cutoff;
#endif

        /*
         * 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')) {
                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 = (int)(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)
                /* LINTED interface specification */
                *endptr = (char *)(any ? s - 1 : nptr);
        return (acc);
}
Revision:	6902
Committed:	Fri Oct 31 22:42:24 2014 UTC (9 years, 6 months ago) by laffer1
Content type:	text/plain
File size:	4480 byte(s)
Log Message:	add tnftp vendor with 20141031 release
#	Content
1	/* $NetBSD: strtoll.c,v 1.4 2005/05/16 11:27:58 lukem Exp $ */
2	/* from NetBSD: strtoll.c,v 1.6 2003/10/27 00:12:42 lukem Exp */
3
4	/*-
5	* Copyright (c) 1992, 1993
6	* The Regents of the University of California. All rights reserved.
7	*
8	* Redistribution and use in source and binary forms, with or without
9	* modification, are permitted provided that the following conditions
10	* are met:
11	* 1. Redistributions of source code must retain the above copyright
12	* notice, this list of conditions and the following disclaimer.
13	* 2. Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.
16	* 3. Neither the name of the University nor the names of its contributors
17	* may be used to endorse or promote products derived from this software
18	* without specific prior written permission.
19	*
20	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30	* SUCH DAMAGE.
31	*/
32
33	#include "tnftp.h"
34
35	/*
36	* Convert a string to a long long integer.
37	*
38	* Ignores `locale' stuff. Assumes that the upper and lower case
39	* alphabets and digits are each contiguous.
40	*/
41	long long int
42	strtoll(const char nptr, char *endptr, int base)
43	{
44	const char *s;
45	/* LONGLONG */
46	long long int acc, cutoff;
47	int c;
48	int neg, any, cutlim;
49
50	/* endptr may be NULL */
51
52	#ifdef __GNUC__
53	/* This outrageous construct just to shut up a GCC warning. */
54	(void) &acc; (void) &cutoff;
55	#endif
56
57	/*
58	* Skip white space and pick up leading +/- sign if any.
59	* If base is 0, allow 0x for hex and 0 for octal, else
60	* assume decimal; if base is already 16, allow 0x.
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) &&
75	c == '0' && (s == 'x' \|\| s == 'X')) {
76	c = s[1];
77	s += 2;
78	base = 16;
79	}
80	if (base == 0)
81	base = c == '0' ? 8 : 10;
82
83	/*
84	* Compute the cutoff value between legal numbers and illegal
85	* numbers. That is the largest legal value, divided by the
86	* base. An input number that is greater than this value, if
87	* followed by a legal input character, is too big. One that
88	* is equal to this value may be valid or not; the limit
89	* between valid and invalid numbers is then based on the last
90	* digit. For instance, if the range for long longs is
91	* [-9223372036854775808..9223372036854775807] and the input base
92	* is 10, cutoff will be set to 922337203685477580 and cutlim to
93	* either 7 (neg==0) or 8 (neg==1), meaning that if we have
94	* accumulated a value > 922337203685477580, or equal but the
95	* next digit is > 7 (or 8), the number is too big, and we will
96	* return a range error.
97	*
98	* Set any if any `digits' consumed; make it negative to indicate
99	* overflow.
100	*/
101	cutoff = neg ? LLONG_MIN : LLONG_MAX;
102	cutlim = (int)(cutoff % base);
103	cutoff /= base;
104	if (neg) {
105	if (cutlim > 0) {
106	cutlim -= base;
107	cutoff += 1;
108	}
109	cutlim = -cutlim;
110	}
111	for (acc = 0, any = 0;; c = (unsigned char) *s++) {
112	if (isdigit(c))
113	c -= '0';
114	else if (isalpha(c))
115	c -= isupper(c) ? 'A' - 10 : 'a' - 10;
116	else
117	break;
118	if (c >= base)
119	break;
120	if (any < 0)
121	continue;
122	if (neg) {
123	if (acc < cutoff \|\| (acc == cutoff && c > cutlim)) {
124	any = -1;
125	acc = LLONG_MIN;
126	errno = ERANGE;
127	} else {
128	any = 1;
129	acc *= base;
130	acc -= c;
131	}
132	} else {
133	if (acc > cutoff \|\| (acc == cutoff && c > cutlim)) {
134	any = -1;
135	acc = LLONG_MAX;
136	errno = ERANGE;
137	} else {
138	any = 1;
139	acc *= base;
140	acc += c;
141	}
142	}
143	}
144	if (endptr != 0)
145	/* LINTED interface specification */
146	endptr = (char )(any ? s - 1 : nptr);
147	return (acc);
148	}