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/*
This file is part of GNUnet.
Copyright (C) 2001, 2002, 2003, 2004, 2006, 2012 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @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",__VA_ARGS__)
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
}
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
}
/**
* 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;
}
uint64_t
GNUNET_htonll_signed (int64_t n)
{
return GNUNET_htonll (n - INT64_MIN);
}
int64_t
GNUNET_ntohll_signed (uint64_t n)
{
return GNUNET_ntohll (n) + INT64_MIN;
}
uint32_t
GNUNET_htonl_signed (int32_t n)
{
return htonl (n - INT32_MIN);
}
int32_t
GNUNET_ntohl_signed (uint32_t n)
{
return ntohl (n) + INT32_MIN;
}
uint16_t
GNUNET_htons_signed (int16_t n)
{
return htons (n - INT16_MIN);
}
int16_t
GNUNET_ntohs_signed (uint16_t n)
{
return ntohs (n) + INT16_MIN;
}
/* end of common_endian.c */
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