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/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
22 * @file util/common_endian.c
23 * @brief endian conversion helpers
24 * @author Christian Grothoff
25 * @author Gabor X Toth
29 #include "gnunet_crypto_lib.h"
31 #define LOG(kind, ...) GNUNET_log_from (kind, "util-common-endian", __VA_ARGS__)
36 GNUNET_htonll (uint64_t n)
38 #if __BYTE_ORDER == __BIG_ENDIAN
40 #elif __BYTE_ORDER == __LITTLE_ENDIAN
41 return (((uint64_t) htonl (n)) << 32) + htonl (n >> 32);
43 #error byteorder undefined
53 GNUNET_ntohll (uint64_t n)
55 #if __BYTE_ORDER == __BIG_ENDIAN
57 #elif __BYTE_ORDER == __LITTLE_ENDIAN
58 return (((uint64_t) ntohl (n)) << 32) + ntohl (n >> 32);
60 #error byteorder undefined
69 * Convert double to network-byte-order.
70 * @param d the value in network byte order
71 * @return the same value in host byte order
74 GNUNET_hton_double (double d)
77 uint64_t *in = (uint64_t *) &d;
78 uint64_t *out = (uint64_t *) &res;
80 out[0] = GNUNET_htonll (in[0]);
87 * Convert double to host-byte-order
88 * @param d the value in network byte order
89 * @return the same value in host byte order
92 GNUNET_ntoh_double (double d)
95 uint64_t *in = (uint64_t *) &d;
96 uint64_t *out = (uint64_t *) &res;
98 out[0] = GNUNET_ntohll (in[0]);
104 /* end of common_endian.c */