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 Affero 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.
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 * @file util/common_endian.c
21 * @brief endian conversion helpers
22 * @author Christian Grothoff
23 * @author Gabor X Toth
27 #include "gnunet_crypto_lib.h"
29 #define LOG(kind,...) GNUNET_log_from (kind, "util-common-endian",__VA_ARGS__)
33 GNUNET_htonll (uint64_t n)
35 #if __BYTE_ORDER == __BIG_ENDIAN
37 #elif __BYTE_ORDER == __LITTLE_ENDIAN
38 return (((uint64_t) htonl (n)) << 32) + htonl (n >> 32);
40 #error byteorder undefined
46 GNUNET_ntohll (uint64_t n)
48 #if __BYTE_ORDER == __BIG_ENDIAN
50 #elif __BYTE_ORDER == __LITTLE_ENDIAN
51 return (((uint64_t) ntohl (n)) << 32) + ntohl (n >> 32);
53 #error byteorder undefined
59 * Convert double to network-byte-order.
60 * @param d the value in network byte order
61 * @return the same value in host byte order
64 GNUNET_hton_double (double d)
67 uint64_t *in = (uint64_t *) &d;
68 uint64_t *out = (uint64_t *) &res;
70 out[0] = GNUNET_htonll(in[0]);
77 * Convert double to host-byte-order
78 * @param d the value in network byte order
79 * @return the same value in host byte order
82 GNUNET_ntoh_double (double d)
85 uint64_t *in = (uint64_t *) &d;
86 uint64_t *out = (uint64_t *) &res;
88 out[0] = GNUNET_ntohll(in[0]);
94 /* end of common_endian.c */