1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
/*
This file is part of GNUnet.
Copyright (C) 2001, 2002, 2003, 2004, 2006, 2012 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/**
* @file util/common_endian.c
* @brief endian conversion helpers
* @author Christian Grothoff
* @author Gabor X Toth
*/
#include "platform.h"
#include "gnunet_crypto_lib.h"
#define LOG(kind,...) GNUNET_log_from (kind, "util-common-endian",__VA_ARGS__)
uint64_t
GNUNET_htonll (uint64_t n)
{
#if __BYTE_ORDER == __BIG_ENDIAN
return n;
#elif __BYTE_ORDER == __LITTLE_ENDIAN
return (((uint64_t) htonl (n)) << 32) + htonl (n >> 32);
#else
#error byteorder undefined
#endif
}
uint64_t
GNUNET_ntohll (uint64_t n)
{
#if __BYTE_ORDER == __BIG_ENDIAN
return n;
#elif __BYTE_ORDER == __LITTLE_ENDIAN
return (((uint64_t) ntohl (n)) << 32) + ntohl (n >> 32);
#else
#error byteorder undefined
#endif
}
/**
* Convert double to network-byte-order.
* @param d the value in network byte order
* @return the same value in host byte order
*/
double
GNUNET_hton_double (double d)
{
double res;
uint64_t *in = (uint64_t *) &d;
uint64_t *out = (uint64_t *) &res;
out[0] = GNUNET_htonll(in[0]);
return res;
}
/**
* Convert double to host-byte-order
* @param d the value in network byte order
* @return the same value in host byte order
*/
double
GNUNET_ntoh_double (double d)
{
double res;
uint64_t *in = (uint64_t *) &d;
uint64_t *out = (uint64_t *) &res;
out[0] = GNUNET_ntohll(in[0]);
return res;
}
/* end of common_endian.c */
|
