contrib/tcpdump/cpack.h

   1 /*-
   2  * Copyright (c) 2003, 2004 David Young.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  * 3. The name of David Young may not be used to endorse or promote
  13  *    products derived from this software without specific prior
  14  *    written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY DAVID YOUNG ``AS IS'' AND ANY
  17  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  18  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  19  * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL DAVID
  20  * YOUNG BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  21  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  22  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  27  * OF SUCH DAMAGE.
  28  */
  29
  30 #ifndef _CPACK_H
  31 #define _CPACK_H
  32
  33 struct cpack_state {
  34         u_int8_t                                        *c_buf;
  35         u_int8_t                                        *c_next;
  36         size_t                                           c_len;
  37 };
  38
  39 int cpack_init(struct cpack_state *, u_int8_t *, size_t);
  40
  41 int cpack_uint8(struct cpack_state *, u_int8_t *);
  42 int cpack_uint16(struct cpack_state *, u_int16_t *);
  43 int cpack_uint32(struct cpack_state *, u_int32_t *);
  44 int cpack_uint64(struct cpack_state *, u_int64_t *);
  45
  46 u_int8_t *cpack_next_boundary(u_int8_t *buf, u_int8_t *p, size_t alignment);
  47 u_int8_t *cpack_align_and_reserve(struct cpack_state *cs, size_t wordsize);
  48
  49 #define cpack_int8(__s, __p)    cpack_uint8((__s),  (u_int8_t*)(__p))
  50 #define cpack_int16(__s, __p)   cpack_uint16((__s), (u_int16_t*)(__p))
  51 #define cpack_int32(__s, __p)   cpack_uint32((__s), (u_int32_t*)(__p))
  52 #define cpack_int64(__s, __p)   cpack_uint64((__s), (u_int64_t*)(__p))
  53
  54 #endif /* _CPACK_H */