2 This file is part of GNUnet.
3 Copyright (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 3, 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
25 * @author Gabor X Toth
29 #include "gnunet_crypto_lib.h"
31 #define LOG(kind,...) GNUNET_log_from (kind, "util",__VA_ARGS__)
35 GNUNET_htonll (uint64_t n)
37 #if __BYTE_ORDER == __BIG_ENDIAN
39 #elif __BYTE_ORDER == __LITTLE_ENDIAN
40 return (((uint64_t) htonl (n)) << 32) + htonl (n >> 32);
42 #error byteorder undefined
48 GNUNET_ntohll (uint64_t n)
50 #if __BYTE_ORDER == __BIG_ENDIAN
52 #elif __BYTE_ORDER == __LITTLE_ENDIAN
53 return (((uint64_t) ntohl (n)) << 32) + ntohl (n >> 32);
55 #error byteorder undefined
61 * Convert double to network-byte-order.
62 * @param d the value in network byte order
63 * @return the same value in host byte order
66 GNUNET_hton_double (double d)
69 uint64_t *in = (uint64_t *) &d;
70 uint64_t *out = (uint64_t *) &res;
72 out[0] = GNUNET_htonll(in[0]);
79 * Convert double to host-byte-order
80 * @param d the value in network byte order
81 * @return the same value in host byte order
84 GNUNET_ntoh_double (double d)
87 uint64_t *in = (uint64_t *) &d;
88 uint64_t *out = (uint64_t *) &res;
90 out[0] = GNUNET_ntohll(in[0]);
97 GNUNET_htonll_signed (int64_t n)
99 return GNUNET_htonll (n - INT64_MIN);
104 GNUNET_ntohll_signed (uint64_t n)
106 return GNUNET_ntohll (n) + INT64_MIN;
111 GNUNET_htonl_signed (int32_t n)
113 return htonl (n - INT32_MIN);
118 GNUNET_ntohl_signed (uint32_t n)
120 return ntohl (n) + INT32_MIN;
125 GNUNET_htons_signed (int16_t n)
127 return htons (n - INT16_MIN);
132 GNUNET_ntohs_signed (uint16_t n)
134 return ntohs (n) + INT16_MIN;
139 /* end of common_endian.c */