89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/* $NetBSD: fgetws.c,v 1.3 2012/03/15 18:22:30 christos Exp $ */
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/*-
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* Copyright (c) 2002 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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* Original version ID:
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* FreeBSD: src/lib/libc/stdio/fgetws.c,v 1.4 2002/09/20 13:25:40 tjr Exp
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*
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*/
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#include <sys/cdefs.h>
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#if defined(LIB_SCCS) && !defined(lint)
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__RCSID("$NetBSD: fgetws.c,v 1.3 2012/03/15 18:22:30 christos Exp $");
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#endif
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#include <assert.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 "reentrant.h"
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#include "local.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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wint_t wc;
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_DIAGASSERT(fp != NULL);
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_DIAGASSERT(ws != NULL);
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FLOCKFILE(fp);
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_SET_ORIENTATION(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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wsp = ws;
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while (n-- > 1) {
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wc = __fgetwc_unlock(fp);
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if (__sferror(fp) != 0)
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goto error;
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if (__sfeof(fp) != 0) {
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if (wsp == ws) {
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/* EOF/error, no characters read yet. */
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goto error;
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}
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break;
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}
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*wsp++ = (wchar_t)wc;
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if (wc == L'\n') {
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break;
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}
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}
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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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