newlib-cygwin/newlib/libc/stdlib/wcstoumax.c

158 lines
4.3 KiB
C

/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* Copyright (c) 2011 The FreeBSD Foundation
* All rights reserved.
* Portions of this software were developed by David Chisnall
* under sponsorship from the FreeBSD Foundation.
*
* 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/cdefs.h>
#if 0
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "from @(#)strtoul.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
__FBSDID("FreeBSD: src/lib/libc/stdlib/strtoumax.c,v 1.8 2002/09/06 11:23:59 tjr Exp ");
#endif
__FBSDID("$FreeBSD: head/lib/libc/locale/wcstoumax.c 314436 2017-02-28 23:42:47Z imp $");
#include <errno.h>
#include <inttypes.h>
#include <stdlib.h>
#include <wchar.h>
#include <wctype.h>
#include <stdint.h>
#include <reent.h>
#include "../locale/setlocale.h"
/*
* Convert a wide character string to a uintmax_t integer.
*/
/*
*Reentrant version of wcstoumax.
*/
static uintmax_t
_wcstoumax_l(struct _reent *rptr,const wchar_t * __restrict nptr,
wchar_t ** __restrict endptr, int base, locale_t loc)
{
const wchar_t *s = nptr;
uintmax_t acc;
wchar_t c;
uintmax_t cutoff;
int neg = 0, any, cutlim;
/*
* See strtoimax for comments as to the logic used.
*/
do {
c = *s++;
} while (iswspace_l(c, loc));
if (c == L'-') {
neg = 1;
c = *s++;
} else {
neg = 0;
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;
acc = any = 0;
if (base < 2 || base > 36)
goto noconv;
cutoff = UINTMAX_MAX / base;
cutlim = UINTMAX_MAX % base;
for ( ; ; c = *s++) {
#ifdef notyet
if (iswdigit_l(c, loc))
c = digittoint_l(c, loc);
else
#endif
if (c >= L'0' && c <= L'9')
c -= L'0';
else if (c >= L'A' && c <= L'Z')
c -= L'A' - 10;
else if (c >= L'a' && c <= L'z')
c -= 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 = UINTMAX_MAX;
rptr->_errno = ERANGE;
} else if (!any) {
noconv:
rptr->_errno = EINVAL;
} else if (neg)
acc = -acc;
if (endptr != NULL)
*endptr = (wchar_t *)(any ? s - 1 : nptr);
return (acc);
}
uintmax_t
_wcstoumax_r(struct _reent *rptr, const wchar_t *__restrict nptr,
wchar_t **__restrict endptr, int base)
{
return _wcstoumax_l(rptr, nptr, endptr, base, __get_current_locale());
}
#ifndef _REENT_ONLY
uintmax_t
wcstoumax_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
int base, locale_t loc)
{
return _wcstoumax_l(_REENT, nptr, endptr, base, loc);
}
uintmax_t
wcstoumax(const wchar_t* __restrict nptr, wchar_t** __restrict endptr, int base)
{
return _wcstoumax_l(_REENT, nptr, endptr, base, __get_current_locale());
}
#endif