17f3654a64
- add fputwc, fgetwc, fwide and related functions. - add hooks needed to maintain the orientation of file stream.
68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/* $NetBSD: fwide.c,v 1.1 2001/12/07 11:47:42 yamt Exp $ */
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/*-
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* Copyright (c)2001 Citrus Project,
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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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* $Citrus$
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*/
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#include <assert.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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#include "reentrant.h"
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int
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fwide(FILE *fp, int mode)
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{
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struct wchar_io_data *wcio;
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_DIAGASSERT(fp != NULL);
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/*
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* this implementation use only -1, 0, 1
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* for mode value.
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* (we don't need to do this, but
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* this can make things simpler.)
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*/
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if (mode > 0)
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mode = 1;
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else if (mode < 0)
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mode = -1;
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FLOCKFILE(fp);
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wcio = WCIO_GET(fp);
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if (!wcio)
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return 0; /* XXX */
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if (wcio->wcio_mode == 0 && mode != 0)
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wcio->wcio_mode = mode;
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else
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mode = wcio->wcio_mode;
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FUNLOCKFILE(fp);
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return mode;
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}
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