/* $Id: mbh.h,v 1.1 2008/05/06 20:04:41 ryo Exp $ */ /* * Copyright (c) 2008 SHIMIZU Ryo * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _MBH_H_ #define _MBH_H_ #undef MBH_DEBUG struct mbh { struct mbuf *mbh_m; /* current pointed mbuf */ int mbh_offset; /* offset of pointer in mbuf */ }; static struct mbh *mbh_open(struct mbh *, struct mbuf *, unsigned int); static inline void mbh_close(struct mbh *); int mbh_forward(struct mbh *, int); int mbh_read_1(struct mbh *); int mbh_read_2(struct mbh *); uint32_t mbh_read_4(struct mbh *); int mbh_read(struct mbh *, void *, int); void *mbh_getbuf(struct mbh *, void *, int); static inline struct mbh * mbh_open(struct mbh *mbh, struct mbuf *m, unsigned int offset) { mbh->mbh_m = m_getptr(m, offset, &mbh->mbh_offset); if (mbh->mbh_m == NULL) return NULL; return mbh; } static inline void mbh_close(struct mbh *mbh __unused) { /* nothing to do */ return; } #ifdef MBH_DEBUG void mbh_dump(struct mbh *); #else #define mbh_dump(mbh) #endif #endif /* _MBH_H_ */