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1 /*
2 * Copyright (c) 2009
3 * The President and Fellows of Harvard College.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #ifndef _ENDIAN_H_
31 #define _ENDIAN_H_
32
33 #include <kern/endian.h>
34
35 /*
36 * Byte swap functions for the kernel.
37 */
38
39 uint16_t bswap16(uint16_t);
40 uint32_t bswap32(uint32_t);
41 uint64_t bswap64(uint64_t);
42
43 uint16_t ntohs(uint16_t);
44 uint16_t htons(uint16_t);
45 uint32_t ntohl(uint32_t);
46 uint32_t htonl(uint32_t);
47 uint64_t ntohll(uint64_t);
48 uint64_t htonll(uint64_t);
49
50 /* Utility functions for handling 64-bit values; see bswap.c for description */
51 void join32to64(uint32_t x1, uint32_t x2, uint64_t *y2);
52 void split64to32(uint64_t x, uint32_t *y1, uint32_t *y2);
53
54
55 #endif /* _ENDIAN_H_ */