110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2002-2004 Tim J. Robbins.
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* All rights reserved.
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*
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* Copyright (c) 2011 The FreeBSD Foundation
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*
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* Portions of this software were developed by David Chisnall
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include "namespace.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <wchar.h>
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#include "un-namespace.h"
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#include "libc_private.h"
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#include "local.h"
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#include "mblocal.h"
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#include "xlocale_private.h"
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/*
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* MT-safe version.
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*/
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wint_t
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fgetwc_l(FILE *fp, locale_t locale)
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{
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wint_t r;
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FIX_LOCALE(locale);
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FLOCKFILE_CANCELSAFE(fp);
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ORIENT(fp, 1);
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r = __fgetwc(fp, locale);
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FUNLOCKFILE_CANCELSAFE();
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return (r);
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}
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wint_t
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fgetwc(FILE *fp)
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{
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return fgetwc_l(fp, __get_locale());
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}
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/*
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* Internal (non-MPSAFE) version of fgetwc(). This version takes an
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* mbstate_t argument specifying the initial conversion state. For
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* wide streams, this should always be fp->_mbstate. On return, *nread
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* is set to the number of bytes read.
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*/
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wint_t
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__fgetwc_mbs(FILE *fp, mbstate_t *mbs, int *nread, locale_t locale)
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{
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wchar_t wc;
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size_t nconv;
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struct xlocale_ctype *l = XLOCALE_CTYPE(locale);
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*nread = 0;
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if (fp->_r <= 0 && __srefill(fp))
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return (WEOF);
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do {
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nconv = l->__mbrtowc(&wc, fp->_p, fp->_r, mbs);
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if (nconv == (size_t)-1) {
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fp->_flags |= __SERR;
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return (WEOF);
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} else if (nconv == (size_t)-2)
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continue;
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else if (nconv == 0) {
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fp->_p++;
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fp->_r--;
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(*nread)++;
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return (L'\0');
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} else {
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fp->_p += nconv;
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fp->_r -= nconv;
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*nread += nconv;
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return (wc);
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}
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} while (__srefill(fp) == 0);
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if (__sfeof(fp)) {
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fp->_flags |= __SERR;
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errno = EILSEQ;
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}
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return (WEOF);
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}
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