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50 lines
1.9 KiB
C
50 lines
1.9 KiB
C
/*
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. 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: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* @(#) $Header: extract.h,v 1.7 94/06/14 20:11:45 leres Exp $ (LBL)
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*/
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#ifdef TCPDUMP_ALIGN
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#if BYTEORDER == LITTLE_ENDIAN
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#define EXTRACT_SHORT(p)\
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((u_short)\
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((u_short)*((u_char *)p+1)<<8|\
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(u_short)*((u_char *)p+0)<<0))
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#define EXTRACT_LONG(p)\
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((u_int32)*((u_char *)p+3)<<24|\
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(u_int32)*((u_char *)p+2)<<16|\
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(u_int32)*((u_char *)p+1)<<8|\
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(u_int32)*((u_char *)p+0)<<0)
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#else
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#define EXTRACT_SHORT(p)\
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((u_short)\
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((u_short)*((u_char *)p+0)<<8|\
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(u_short)*((u_char *)p+1)<<0))
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#define EXTRACT_LONG(p)\
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((u_int32)*((u_char *)p+0)<<24|\
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(u_int32)*((u_char *)p+1)<<16|\
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(u_int32)*((u_char *)p+2)<<8|\
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(u_int32)*((u_char *)p+3)<<0)
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#endif
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#else
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#define EXTRACT_SHORT(p) ((u_short)ntohs(*(u_short *)p))
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#define EXTRACT_LONG(p) (ntohl(*(u_int32 *)p))
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#endif
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