Bump required version for touch.
[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
27 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
28 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 *
36 */
37
38 #include "mem_config.h"
39 #include "libmemcached/byteorder.h"
40
41 /* Byte swap a 64-bit number. */
42 #ifndef swap64
43 static inline uint64_t swap64(uint64_t in)
44 {
45 #ifndef WORDS_BIGENDIAN
46 /* Little endian, flip the bytes around until someone makes a faster/better
47 * way to do this. */
48 uint64_t rv= 0;
49 for (uint8_t x= 0; x < 8; ++x)
50 {
51 rv= (rv << 8) | (in & 0xff);
52 in >>= 8;
53 }
54 return rv;
55 #else
56 /* big-endian machines don't need byte swapping */
57 return in;
58 #endif // WORDS_BIGENDIAN
59 }
60 #endif
61
62
63 uint64_t memcached_ntohll(uint64_t value)
64 {
65 #ifdef HAVE_HTONLL
66 return ntohll(value);
67 #else
68 return swap64(value);
69 #endif
70 }
71
72 uint64_t memcached_htonll(uint64_t value)
73 {
74 #ifdef HAVE_HTONLL
75 return htonll(value);
76 #else
77 return swap64(value);
78 #endif
79 }