101 lines
2.8 KiB
C
101 lines
2.8 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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* 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 <string.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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wchar_t *
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fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp)
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{
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wchar_t *wsp;
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size_t nconv;
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const char *src;
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unsigned char *nl;
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FLOCKFILE(fp);
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ORIENT(fp, 1);
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if (n <= 0) {
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errno = EINVAL;
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goto error;
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}
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if (fp->_r <= 0 && __srefill(fp))
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/* EOF */
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goto error;
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wsp = ws;
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do {
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src = fp->_p;
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nl = memchr(fp->_p, '\n', fp->_r);
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nconv = __mbsnrtowcs(wsp, &src,
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nl != NULL ? (nl - fp->_p + 1) : fp->_r,
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n - 1, &fp->_extra->mbstate);
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if (nconv == (size_t)-1)
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/* Conversion error */
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goto error;
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if (src == NULL) {
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/*
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* We hit a null byte. Increment the character count,
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* since mbsnrtowcs()'s return value doesn't include
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* the terminating null, then resume conversion
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* after the null.
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*/
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nconv++;
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src = memchr(fp->_p, '\0', fp->_r);
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src++;
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}
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fp->_r -= (unsigned char *)src - fp->_p;
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fp->_p = (unsigned char *)src;
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n -= nconv;
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wsp += nconv;
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} while (wsp[-1] != L'\n' && n > 1 && (fp->_r > 0 ||
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__srefill(fp) == 0));
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if (wsp == ws)
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/* EOF */
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goto error;
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if (!__mbsinit(&fp->_extra->mbstate))
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/* Incomplete character */
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goto error;
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*wsp++ = L'\0';
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FUNLOCKFILE(fp);
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return (ws);
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error:
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FUNLOCKFILE(fp);
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return (NULL);
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}
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