4ae83079a7
1) Don't forget to set __SERR on __slbexpand() error. 2) Check for __fgetwc() errors using errno. Don't check for __SERR as PR suggested, it user-visible flag which can stick from previous functions and stdio code don't check it for this purpose. PR: 212033 MFC after: 3 days
94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/*-
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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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* All rights reserved.
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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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__FBSDID("$FreeBSD$");
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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 <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 "xlocale_private.h"
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wchar_t *fgetwln_l(FILE * __restrict, size_t *, locale_t);
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wchar_t *
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fgetwln_l(FILE * __restrict fp, size_t *lenp, locale_t locale)
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{
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wint_t wc;
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size_t len;
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int saverrno;
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FIX_LOCALE(locale);
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FLOCKFILE(fp);
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ORIENT(fp, 1);
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len = 0;
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saverrno = errno;
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errno = 0;
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while ((wc = __fgetwc(fp, locale)) != WEOF) {
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#define GROW 512
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if (len * sizeof(wchar_t) >= fp->_lb._size &&
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__slbexpand(fp, (len + GROW) * sizeof(wchar_t)))
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goto error;
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*((wchar_t *)fp->_lb._base + len++) = wc;
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if (wc == L'\n')
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break;
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errno = 0;
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}
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if (wc == WEOF && errno != 0)
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goto error;
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if (errno == 0)
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errno = saverrno;
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if (len == 0)
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goto eof;
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FUNLOCKFILE(fp);
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*lenp = len;
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return ((wchar_t *)fp->_lb._base);
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error:
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fp->_flags |= __SERR;
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eof:
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FUNLOCKFILE(fp);
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*lenp = 0;
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return (NULL);
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}
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wchar_t *
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fgetwln(FILE * __restrict fp, size_t *lenp)
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{
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return fgetwln_l(fp, lenp, __get_locale());
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}
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