2 This file is part of GNUnet.
3 (C) 2001, 2002, 2003, 2004, 2006, 2012 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 2, or (at your
8 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 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file util/common_endian.c
23 * @brief endian conversion helpers
24 * @author Christian Grothoff
28 #include "gnunet_common.h"
30 #define LOG(kind,...) GNUNET_log_from (kind, "util",__VA_ARGS__)
33 GNUNET_ntohll (uint64_t n)
35 #if __BYTE_ORDER == __BIG_ENDIAN
37 #elif __BYTE_ORDER == __LITTLE_ENDIAN
38 return (((uint64_t) ntohl (n)) << 32) + ntohl (n >> 32);
40 #error byteorder undefined
45 GNUNET_htonll (uint64_t n)
47 #if __BYTE_ORDER == __BIG_ENDIAN
49 #elif __BYTE_ORDER == __LITTLE_ENDIAN
50 return (((uint64_t) htonl (n)) << 32) + htonl (n >> 32);
52 #error byteorder undefined
58 * Convert double to network-byte-order.
59 * @param d the value in network byte order
60 * @return the same value in host byte order
63 GNUNET_hton_double (double d)
66 uint64_t *in = (uint64_t *) &d;
67 uint64_t *out = (uint64_t *) &res;
69 out[0] = GNUNET_htonll(in[0]);
76 * Convert double to host-byte-order
77 * @param d the value in network byte order
78 * @return the same value in host byte order
81 GNUNET_ntoh_double (double d)
84 uint64_t *in = (uint64_t *) &d;
85 uint64_t *out = (uint64_t *) &res;
87 out[0] = GNUNET_ntohll(in[0]);
94 /* end of common_endian.c */