2 This file is part of GNUnet.
3 Copyright (C) 2001, 2002, 2003, 2004, 2006, 2012 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
17 * @file util/common_endian.c
18 * @brief endian conversion helpers
19 * @author Christian Grothoff
20 * @author Gabor X Toth
24 #include "gnunet_crypto_lib.h"
26 #define LOG(kind,...) GNUNET_log_from (kind, "util-common-endian",__VA_ARGS__)
30 GNUNET_htonll (uint64_t n)
32 #if __BYTE_ORDER == __BIG_ENDIAN
34 #elif __BYTE_ORDER == __LITTLE_ENDIAN
35 return (((uint64_t) htonl (n)) << 32) + htonl (n >> 32);
37 #error byteorder undefined
43 GNUNET_ntohll (uint64_t n)
45 #if __BYTE_ORDER == __BIG_ENDIAN
47 #elif __BYTE_ORDER == __LITTLE_ENDIAN
48 return (((uint64_t) ntohl (n)) << 32) + ntohl (n >> 32);
50 #error byteorder undefined
56 * Convert double to network-byte-order.
57 * @param d the value in network byte order
58 * @return the same value in host byte order
61 GNUNET_hton_double (double d)
64 uint64_t *in = (uint64_t *) &d;
65 uint64_t *out = (uint64_t *) &res;
67 out[0] = GNUNET_htonll(in[0]);
74 * Convert double to host-byte-order
75 * @param d the value in network byte order
76 * @return the same value in host byte order
79 GNUNET_ntoh_double (double d)
82 uint64_t *in = (uint64_t *) &d;
83 uint64_t *out = (uint64_t *) &res;
85 out[0] = GNUNET_ntohll(in[0]);
91 /* end of common_endian.c */