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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
This program 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 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
/*****************************************************************************
*
* $/Plasma20/Sources/Plasma/NucleusLib/pnUtils/Private/pnUtEndian.h
*
***/
#ifdef PLASMA20_SOURCES_PLASMA_NUCLEUSLIB_PNUTILS_PRIVATE_PNUTENDIAN_H
#error "Header $/Plasma20/Sources/Plasma/NucleusLib/pnUtils/Private/pnUtEndian.h included more than once"
#endif
#define PLASMA20_SOURCES_PLASMA_NUCLEUSLIB_PNUTILS_PRIVATE_PNUTENDIAN_H
// NOTE: Because we predominantly run on little-endian CPUs, we don't
// convert to "network order" when sending integers across the network
// (tcp uses big-endian regardless of underlying hardware) and instead
// use little-endian as the "native" language of our network messages.
/*****************************************************************************
*
* Types and constants
*
***/
#ifdef _M_IX86
# define LITTLE_ENDIAN 1
#else
# define BIG_ENDIAN 1
// That was a pretty weak check for endian-ness, if it
// failed then we probably need to strengthen it a bit.
# error "Are you sure this is a big-endian CPU?"
#endif
/*****************************************************************************
*
* Little endian functions
*
***/
#ifdef LITTLE_ENDIAN
//============================================================================
inline word Endian (word value) { return value; }
inline dword Endian (dword value) { return value; }
inline qword Endian (qword value) { return value; }
//===========================================================================
inline void EndianConvert (
word * array,
unsigned count
) {
return;
}
//===========================================================================
inline void EndianConvert (
dword * array,
unsigned count
) {
return;
}
//===========================================================================
inline void EndianConvert (
qword * array,
unsigned count
) {
return;
}
//===========================================================================
inline void EndianConvert (
byte * data,
unsigned elemCount,
unsigned elemBytes
) {
return;
}
//===========================================================================
inline void EndianCopy (
word * dst,
const word src[],
unsigned count
) {
MemCopy(dst, src, count * sizeof(word));
}
//===========================================================================
inline void EndianCopy (
dword * dst,
const dword src[],
unsigned count
) {
MemCopy(dst, src, count * sizeof(dword));
}
//===========================================================================
inline void EndianCopy (
qword * dst,
const qword src[],
unsigned count
) {
MemCopy(dst, src, count * sizeof(qword));
}
//===========================================================================
inline void EndianCopy (
void * dst,
const byte src[],
unsigned elemCount,
unsigned elemBytes
) {
MemCopy(dst, src, elemCount * elemBytes);
}
#endif // LITTLE_ENDIAN
/*****************************************************************************
*
* Big endian functions
*
***/
#ifdef BIG_ENDIAN
//===========================================================================
inline word Endian (word value) {
return (value >> 8) | (value << 8);
}
//===========================================================================
inline dword Endian (dword value) {
return ((value) << 24) |
((value & 0x0000ff00) << 8) |
((value & 0x00ff0000) >> 8) |
((value) >> 24);
}
//===========================================================================
inline qword Endian (qword value) {
return ((value) << 56) |
((value & 0x000000000000ff00) << 40) |
((value & 0x0000000000ff0000) << 24) |
((value & 0x00000000ff000000) << 8) |
((value & 0x000000ff00000000) >> 8) |
((value & 0x0000ff0000000000) >> 24) |
((value & 0x00ff000000000000) >> 40) |
((value) >> 56);
}
void EndianConvert (word * array, unsigned count);
void EndianConvert (dword * array, unsigned count);
void EndianConvert (qword * array, unsigned count);
void EndianConvert (byte * data, unsigned elemCount, unsigned elemBytes);
void EndianCopy (word * dst, const word src[], unsigned count);
void EndianCopy (dword * dst, const dword src[], unsigned count);
void EndianCopy (qword * dst, const dword src[], unsigned count);
void EndianCopy (void * dst, const byte src[], unsigned elemCount, unsigned elemBytes);
#endif