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/*
* JFFS2 -- Journalling Flash File System, Version 2.
*
* Copyright (C) 2001 Red Hat, Inc.
*
* Created by David Woodhouse <dwmw2@cambridge.redhat.com>
*
* The original JFFS, from which the design for JFFS2 was derived,
* was designed and implemented by Axis Communications AB.
*
* The contents of this file are subject to the Red Hat eCos Public
* License Version 1.1 (the "Licence"); you may not use this file
* except in compliance with the Licence. You may obtain a copy of
* the Licence at http://www.redhat.com/
*
* Software distributed under the Licence is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
* See the Licence for the specific language governing rights and
* limitations under the Licence.
*
* The Original Code is JFFS2 - Journalling Flash File System, version 2
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License version 2 (the "GPL"), in
* which case the provisions of the GPL are applicable instead of the
* above. If you wish to allow the use of your version of this file
* only under the terms of the GPL and not to allow others to use your
* version of this file under the RHEPL, indicate your decision by
* deleting the provisions above and replace them with the notice and
* other provisions required by the GPL. If you do not delete the
* provisions above, a recipient may use your version of this file
* under either the RHEPL or the GPL.
*
* $Id: pushpull.h,v 1.5 2001/09/23 10:04:15 rmk Exp $
*
*/
#ifndef __PUSHPULL_H__
#define __PUSHPULL_H__
struct pushpull {
unsigned char *buf;
unsigned int buflen;
unsigned int ofs;
unsigned int reserve;
};
void init_pushpull(struct pushpull *, char *, unsigned, unsigned, unsigned);
int pushbit(struct pushpull *pp, int bit, int use_reserved);
int pushedbits(struct pushpull *pp);
static inline int pullbit(struct pushpull *pp)
{
int bit;
bit = (pp->buf[pp->ofs >> 3] >> (7-(pp->ofs & 7))) & 1;
pp->ofs++;
return bit;
}
static inline int pulledbits(struct pushpull *pp)
{
return pp->ofs;
}
#endif /* __PUSHPULL_H__ */
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