2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Copyright (c) 2011 The FreeBSD Foundation
7 * Portions of this software were developed by David Chisnall
8 * under sponsorship from the FreeBSD Foundation.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 /* #include <sys/cdefs.h> */
50 * Convert a string to a long long integer.
52 * Assumes that the upper and lower case
53 * alphabets and digits are each contiguous.
55 ROKEN_LIB_FUNCTION
long long ROKEN_LIB_CALL
56 strtoll(const char * __restrict nptr
, char ** __restrict endptr
, int base
)
59 unsigned long long acc
;
61 unsigned long long cutoff
;
65 * Skip white space and pick up leading +/- sign if any.
66 * If base is 0, allow 0x for hex and 0 for octal, else
67 * assume decimal; if base is already 16, allow 0x.
72 } while (isspace((unsigned char)c
));
81 if ((base
== 0 || base
== 16) &&
82 c
== '0' && (*s
== 'x' || *s
== 'X') &&
83 ((s
[1] >= '0' && s
[1] <= '9') ||
84 (s
[1] >= 'A' && s
[1] <= 'F') ||
85 (s
[1] >= 'a' && s
[1] <= 'f'))) {
91 base
= c
== '0' ? 8 : 10;
93 if (base
< 2 || base
> 36)
97 * Compute the cutoff value between legal numbers and illegal
98 * numbers. That is the largest legal value, divided by the
99 * base. An input number that is greater than this value, if
100 * followed by a legal input character, is too big. One that
101 * is equal to this value may be valid or not; the limit
102 * between valid and invalid numbers is then based on the last
103 * digit. For instance, if the range for quads is
104 * [-9223372036854775808..9223372036854775807] and the input base
105 * is 10, cutoff will be set to 922337203685477580 and cutlim to
106 * either 7 (neg==0) or 8 (neg==1), meaning that if we have
107 * accumulated a value > 922337203685477580, or equal but the
108 * next digit is > 7 (or 8), the number is too big, and we will
109 * return a range error.
111 * Set 'any' if any `digits' consumed; make it negative to indicate
114 cutoff
= neg
? (unsigned long long)-(LLONG_MIN
+ LLONG_MAX
) + LLONG_MAX
116 cutlim
= cutoff
% base
;
118 for ( ; ; c
= *s
++) {
119 if (c
>= '0' && c
<= '9')
121 else if (c
>= 'A' && c
<= 'Z')
123 else if (c
>= 'a' && c
<= 'z')
129 if (any
< 0 || acc
> cutoff
|| (acc
== cutoff
&& c
> cutlim
))
138 acc
= neg
? LLONG_MIN
: LLONG_MAX
;
146 *endptr
= (char *)(any
? s
- 1 : nptr
);