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- /*
- This file is part of GNUnet.
- Copyright (C) 2001, 2002, 2003, 2004, 2006, 2012 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- or (at your option) any later version.
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Affero General Public License for more details.
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file util/common_endian.c
- * @brief endian conversion helpers
- * @author Christian Grothoff
- * @author Gabor X Toth
- */
- #include "platform.h"
- #include "gnunet_crypto_lib.h"
- #define LOG(kind, ...) GNUNET_log_from (kind, "util-common-endian", __VA_ARGS__)
- #ifndef htonbe64
- uint64_t
- GNUNET_htonll (uint64_t n)
- {
- #if __BYTE_ORDER == __BIG_ENDIAN
- return n;
- #elif __BYTE_ORDER == __LITTLE_ENDIAN
- return (((uint64_t) htonl (n)) << 32) + htonl (n >> 32);
- #else
- #error byteorder undefined
- #endif
- }
- #endif
- #ifndef be64toh
- uint64_t
- GNUNET_ntohll (uint64_t n)
- {
- #if __BYTE_ORDER == __BIG_ENDIAN
- return n;
- #elif __BYTE_ORDER == __LITTLE_ENDIAN
- return (((uint64_t) ntohl (n)) << 32) + ntohl (n >> 32);
- #else
- #error byteorder undefined
- #endif
- }
- #endif
- /**
- * Convert double to network-byte-order.
- * @param d the value in network byte order
- * @return the same value in host byte order
- */
- double
- GNUNET_hton_double (double d)
- {
- double res;
- uint64_t *in = (uint64_t *) &d;
- uint64_t *out = (uint64_t *) &res;
- out[0] = GNUNET_htonll (in[0]);
- return res;
- }
- /**
- * Convert double to host-byte-order
- * @param d the value in network byte order
- * @return the same value in host byte order
- */
- double
- GNUNET_ntoh_double (double d)
- {
- double res;
- uint64_t *in = (uint64_t *) &d;
- uint64_t *out = (uint64_t *) &res;
- out[0] = GNUNET_ntohll (in[0]);
- return res;
- }
- /* end of common_endian.c */
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