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[/] [or1k/] [tags/] [LINUX_2_4_26_OR32/] [linux/] [linux-2.4/] [fs/] [jffs2/] [pushpull.h] - Rev 1765
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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 1.1.1.1 2004-04-15 01:11:08 phoenix 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__ */