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/* $OpenBSD: fgetws.c,v 1.8 2016/01/04 16:14:19 schwarze Exp $ */ |
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/* $NetBSD: fgetws.c,v 1.1 2003/03/07 07:11:37 tshiozak 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 <errno.h> |
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#include <stdio.h> |
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#include <wchar.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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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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if ((wc = __fgetwc_unlock(fp)) == WEOF && |
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ferror(fp) && errno == EILSEQ) |
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goto error; |
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if (wc == WEOF) { |
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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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DEF_STRONG(fgetws); |