mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-24 23:32:06 +00:00
141 lines
4.6 KiB
C
141 lines
4.6 KiB
C
/*
|
|
This code is based on strtoul.c which has the following copyright.
|
|
It is used to convert a wide string into a signed long long.
|
|
|
|
long long _wcstoll_r (struct _reent *rptr, const wchar_t *s,
|
|
wchar_t **ptr, int base);
|
|
*/
|
|
|
|
/*-
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. 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.
|
|
*/
|
|
|
|
#ifdef __GNUC__
|
|
|
|
#define _GNU_SOURCE
|
|
#include <_ansi.h>
|
|
#include <limits.h>
|
|
#include <wctype.h>
|
|
#include <errno.h>
|
|
#include <wchar.h>
|
|
#include <reent.h>
|
|
|
|
/*
|
|
* Convert a wide string to a long long integer.
|
|
*
|
|
* Ignores `locale' stuff. Assumes that the upper and lower case
|
|
* alphabets and digits are each contiguous.
|
|
*/
|
|
long long
|
|
_DEFUN (_wcstoll_r, (rptr, nptr, endptr, base),
|
|
struct _reent *rptr _AND
|
|
_CONST wchar_t *nptr _AND
|
|
wchar_t **endptr _AND
|
|
int base)
|
|
{
|
|
register const wchar_t *s = nptr;
|
|
register unsigned long long acc;
|
|
register int c;
|
|
register unsigned long long cutoff;
|
|
register int neg = 0, any, cutlim;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
do {
|
|
c = *s++;
|
|
} while (iswspace(c));
|
|
if (c == L'-') {
|
|
neg = 1;
|
|
c = *s++;
|
|
} else if (c == L'+')
|
|
c = *s++;
|
|
if ((base == 0 || base == 16) &&
|
|
c == L'0' && (*s == L'x' || *s == L'X')) {
|
|
c = s[1];
|
|
s += 2;
|
|
base = 16;
|
|
}
|
|
if (base == 0)
|
|
base = c == L'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 longs is
|
|
* [-2147483648..2147483647] and the input base is 10,
|
|
* cutoff will be set to 214748364 and cutlim to either
|
|
* 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated
|
|
* a value > 214748364, 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 ? -(unsigned long long)LONG_LONG_MIN : LONG_LONG_MAX;
|
|
cutlim = cutoff % (unsigned long long)base;
|
|
cutoff /= (unsigned long long)base;
|
|
for (acc = 0, any = 0;; c = *s++) {
|
|
if (iswdigit(c))
|
|
c -= L'0';
|
|
else if (iswalpha(c))
|
|
c -= iswupper(c) ? L'A' - 10 : L'a' - 10;
|
|
else
|
|
break;
|
|
if (c >= base)
|
|
break;
|
|
if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
|
|
any = -1;
|
|
else {
|
|
any = 1;
|
|
acc *= base;
|
|
acc += c;
|
|
}
|
|
}
|
|
if (any < 0) {
|
|
acc = neg ? LONG_LONG_MIN : LONG_LONG_MAX;
|
|
rptr->_errno = ERANGE;
|
|
} else if (neg)
|
|
acc = -acc;
|
|
if (endptr != 0)
|
|
*endptr = (wchar_t *) (any ? s - 1 : nptr);
|
|
return (acc);
|
|
}
|
|
|
|
#endif /* __GNUC__ */
|