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/*
* Copyright (c) 1994-1998 The University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* Mach Operating System
* Copyright (c) 1993-1989 Carnegie Mellon University.
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#include <stdio.h>
#include <stdarg.h>
#include "doscan.h"
/* XXX kludge to work around absence of ungetc() */
typedef struct state
{
FILE *fh;
int ch;
} state;
static int
read_char(void *arg)
{
state *st = (state*)arg;
if (st->ch >= 0)
{
int c = st->ch;
st->ch = -1;
return c;
}
else
return fgetc(st->fh);
}
static void
unread(int c, void *arg)
{
state *st = (state*)arg;
st->ch = c;
}
#if 0
static int
read_char(void *arg)
{
return fgetc((FILE*)arg);
}
static void
unread(int c, void *arg)
{
ungetc(c, (FILE*)arg);
}
#endif
int vfscanf(FILE *fh, const char *fmt, va_list args)
{
return _doscan(fmt, args, read_char, unread, fh);
}
int
fscanf(FILE *fh, const char *fmt, ...)
{
int nmatch = 0;
va_list args;
state st;
st.fh = fh;
st.ch = -1;
va_start(args, fmt);
nmatch = vfscanf((FILE *)&st, fmt, args);
va_end(args);
return nmatch;
}
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