60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
/* Copyright (C) 1993, 95, 96, 97, 98, 99 Free Software Foundation, Inc.
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This file is part of the GNU IO Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2, or (at
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your option) any later version.
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This library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this library; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA.
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As a special exception, if you link this library with files
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compiled with a GNU compiler to produce an executable, this does
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not cause the resulting executable to be covered by the GNU General
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Public License. This exception does not however invalidate any
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other reasons why the executable file might be covered by the GNU
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General Public License. */
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#include "libioP.h"
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#include <wchar.h>
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wchar_t *
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fgetws_unlocked (buf, n, fp)
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wchar_t *buf;
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int n;
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_IO_FILE *fp;
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{
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_IO_size_t count;
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wchar_t *result;
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int old_error;
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CHECK_FILE (fp, NULL);
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if (n <= 0)
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return NULL;
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/* This is very tricky since a file descriptor may be in the
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non-blocking mode. The error flag doesn't mean much in this
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case. We return an error only when there is a new error. */
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old_error = fp->_IO_file_flags & _IO_ERR_SEEN;
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fp->_IO_file_flags &= ~_IO_ERR_SEEN;
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count = _IO_getwline (fp, buf, n - 1, L'\n', 1);
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/* If we read in some bytes and errno is EAGAIN, that error will
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be reported for next read. */
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if (count == 0 || ((fp->_IO_file_flags & _IO_ERR_SEEN)
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&& errno != EAGAIN))
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result = NULL;
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else
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{
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buf[count] = '\0';
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result = buf;
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}
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fp->_IO_file_flags |= old_error;
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return result;
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}
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