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/*
* Copyright 2013 Garrett D'Amore <garrett@damore.org>
* Copyright 2010 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2002-2004 Tim J. Robbins.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 "lint.h"
#include "mse_int.h"
#include "file64.h"
#include "mtlib.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <wchar.h>
#include "mblocal.h"
#include "stdiom.h"
#include "localeimpl.h"
#include "lctype.h"
/*
* Non-MT-safe version.
*/
wint_t
_fgetwc_unlocked_l(FILE *fp, locale_t loc)
{
wchar_t wc;
size_t nconv;
int c;
mbstate_t *statep;
const struct lc_ctype *lct;
if ((c = GETC(fp)) == EOF)
return (WEOF);
lct = loc->ctype;
if (lct->lc_max_mblen == 1) {
/* Fast path for single-byte encodings. */
return ((wint_t)c);
}
statep = _getmbstate(fp);
if (statep == NULL) {
fp->_flag = _IOERR;
errno = EBADF;
return (WEOF);
}
do {
char x = (char)c;
nconv = lct->lc_mbrtowc(&wc, &x, 1, statep, B_FALSE);
if (nconv == (size_t)-1) {
break;
} else if (nconv == (size_t)-2) {
/* Incompletely decoded, consume another char */
continue;
} else if (nconv == 0) {
/*
* Assume that the only valid representation of
* the null wide character is a single null byte.
*/
return (L'\0');
} else {
return (wc);
}
} while ((c = GETC(fp)) != EOF);
/*
* If we got here it means we got truncated in a character, or
* the character did not decode properly. Note that in the case
* of a botched decoding, we don't UNGETC the bad bytes. Should
* we?
*/
fp->_flag |= _IOERR;
errno = EILSEQ;
return (WEOF);
}
wint_t
_fgetwc_unlocked(FILE *fp)
{
return (_fgetwc_unlocked_l(fp, uselocale(NULL)));
}
/*
* MT safe version
*/
#undef getwc
#pragma weak getwc = fgetwc
wint_t
fgetwc(FILE *fp)
{
wint_t r;
rmutex_t *l;
locale_t loc = uselocale(NULL);
FLOCKFILE(l, fp);
r = _fgetwc_unlocked_l(fp, loc);
FUNLOCKFILE(l);
return (r);
}
/*
* XPG5 version.
*/
#undef __getwc_xpg5
#pragma weak __getwc_xpg5 = __fgetwc_xpg5
wint_t
__fgetwc_xpg5(FILE *fp)
{
wint_t r;
rmutex_t *l;
locale_t loc = uselocale(NULL);
FLOCKFILE(l, fp);
if (GET_NO_MODE(fp))
_setorientation(fp, _WC_MODE);
r = _fgetwc_unlocked_l(fp, loc);
FUNLOCKFILE(l);
return (r);
}
#pragma weak getwc_l = fgetwc_l
wint_t
fgetwc_l(FILE *fp, locale_t loc)
{
wint_t r;
rmutex_t *l;
FLOCKFILE(l, fp);
if (GET_NO_MODE(fp))
_setorientation(fp, _WC_MODE);
r = _fgetwc_unlocked_l(fp, loc);
FUNLOCKFILE(l);
return (r);
}
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