Shuffle for readability
[awesomized/libmemcached] / libmemcached / byteorder.cc
1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
2 *
3 * Libmemcached library
4 *
5 * Copyright (C) 2011 Data Differential, http://datadifferential.com/
6 * Copyright (C) 2006-2009 Brian Aker All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
10 * met:
11 *
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * * Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following disclaimer
17 * in the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * * The names of its contributors may not be used to endorse or
21 * promote products derived from this software without specific prior
22 * written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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36 */
37
38 #include <libmemcached/common.h>
39
40 /* Byte swap a 64-bit number. */
41 #ifndef swap64
42 static inline uint64_t swap64(uint64_t in)
43 {
44 #ifndef WORDS_BIGENDIAN
45 /* Little endian, flip the bytes around until someone makes a faster/better
46 * way to do this. */
47 uint64_t rv= 0;
48 for (uint8_t x= 0; x < 8; x++)
49 {
50 rv= (rv << 8) | (in & 0xff);
51 in >>= 8;
52 }
53 return rv;
54 #else
55 /* big-endian machines don't need byte swapping */
56 return in;
57 #endif // WORDS_BIGENDIAN
58 }
59 #endif
60
61 #ifdef HAVE_HTONLL
62
63 uint64_t memcached_ntohll(uint64_t value)
64 {
65 return ntohll(value);
66 }
67
68 uint64_t memcached_htonll(uint64_t value)
69 {
70 return htonll(value);
71 }
72
73 #else // HAVE_HTONLL
74
75 uint64_t memcached_ntohll(uint64_t value)
76 {
77 return swap64(value);
78 }
79
80 uint64_t memcached_htonll(uint64_t value)
81 {
82 return swap64(value);
83 }
84
85 #endif // HAVE_HTONLL