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Annotation of embedaddon/iftop/extract.h, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (c) 1992, 1993, 1994, 1995, 1996
                      3:  *     The Regents of the University of California.  All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that: (1) source code distributions
                      7:  * retain the above copyright notice and this paragraph in its entirety, (2)
                      8:  * distributions including binary code include the above copyright notice and
                      9:  * this paragraph in its entirety in the documentation or other materials
                     10:  * provided with the distribution, and (3) all advertising materials mentioning
                     11:  * features or use of this software display the following acknowledgement:
                     12:  * ``This product includes software developed by the University of California,
                     13:  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
                     14:  * the University nor the names of its contributors may be used to endorse
                     15:  * or promote products derived from this software without specific prior
                     16:  * written permission.
                     17:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     18:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     19:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     20:  *
                     21:  * @(#) $Header: /home/pdw/vcvs/repos/iftop/extract.h,v 1.2 2003/06/06 22:42:34 pdw Exp $ (LBL)
                     22:  */
                     23: 
                     24: /* Network to host order macros */
                     25: 
                     26: #ifdef LBL_ALIGN
                     27: #define EXTRACT_16BITS(p) \
                     28:        ((u_int16_t)*((const u_int8_t *)(p) + 0) << 8 | \
                     29:        (u_int16_t)*((const u_int8_t *)(p) + 1))
                     30: #define EXTRACT_32BITS(p) \
                     31:        ((u_int32_t)*((const u_int8_t *)(p) + 0) << 24 | \
                     32:        (u_int32_t)*((const u_int8_t *)(p) + 1) << 16 | \
                     33:        (u_int32_t)*((const u_int8_t *)(p) + 2) << 8 | \
                     34:        (u_int32_t)*((const u_int8_t *)(p) + 3))
                     35: #else
                     36: #define EXTRACT_16BITS(p) \
                     37:        ((u_int16_t)ntohs(*(const u_int16_t *)(p)))
                     38: #define EXTRACT_32BITS(p) \
                     39:        ((u_int32_t)ntohl(*(const u_int32_t *)(p)))
                     40: #endif
                     41: 
                     42: #define EXTRACT_24BITS(p) \
                     43:        ((u_int32_t)*((const u_int8_t *)(p) + 0) << 16 | \
                     44:        (u_int32_t)*((const u_int8_t *)(p) + 1) << 8 | \
                     45:        (u_int32_t)*((const u_int8_t *)(p) + 2))
                     46: 
                     47: /* Little endian protocol host order macros */
                     48: 
                     49: #define EXTRACT_LE_8BITS(p) (*(p))
                     50: #define EXTRACT_LE_16BITS(p) \
                     51:        ((u_int16_t)*((const u_int8_t *)(p) + 1) << 8 | \
                     52:        (u_int16_t)*((const u_int8_t *)(p) + 0))
                     53: #define EXTRACT_LE_32BITS(p) \
                     54:        ((u_int32_t)*((const u_int8_t *)(p) + 3) << 24 | \
                     55:        (u_int32_t)*((const u_int8_t *)(p) + 2) << 16 | \
                     56:        (u_int32_t)*((const u_int8_t *)(p) + 1) << 8 | \
                     57:        (u_int32_t)*((const u_int8_t *)(p) + 0))