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/** <pre>
* The SDK is used to create and format CIGI compliant messages.
* Copyright (c) 2001-2005 The Boeing Company
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*
* This library 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 Lesser Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* FILENAME: CigiSwapping.cpp
* LANGUAGE: C++
* CLASS: UNCLASSIFIED
* PROJECT: Common Image Generator Interface (CIGI) SDK
*
* PROGRAM DESCRIPTION:
* ...
*
* MODIFICATION NOTES:
* DATE NAME SCR NUMBER
* DESCRIPTION OF CHANGE........................
*
* 09/17/2003 Greg Basler CIGI_CR_DR_1
* Initial Release.
*
* 01/21/2005 Greg Basler Version 1.5
* Defined _EXPORT_CCL_ for exporting the class in a Windows DLL.
*
* 01/21/2005 Greg Basler Version 1.5
* Removed the inline defnitions for the PackedPointer union and included the
* CigiTypes.h header.
*
* 01/21/2005 Greg Basler Version 1.5
* Added modifiers to export the CigiSwap2, CigiSwap4, and CigiSwap8 functions
* when built as a Windows DLL.
*
* 01/21/2005 Greg Basler Version 1.5
* Changed native C++ types to use CCL-defined types instead where appropriate.
*
* 06/23/2006 Greg Basler Version 1.7.1
* Changed native char and unsigned char types to CIGI types Cigi_int8 and
* Cigi_uint8.
*
* 11/20/2007 Greg Basler Version 2.0.0
* Changed CigiCopy8 to make sure that it works for big endian and non-intel
* machines.
*
* </pre>
* Author: The Boeing Company
*
*/
#define _EXPORT_CCL_
#include "CigiTypes.h"
union _SWAP_UNION
{
Cigi_uint32 i;
Cigi_uint8 b[4];
};
typedef union _SWAP_UNION SWAP_UNION;
// ====================================================================
// CigiSwap2
// ====================================================================
CIGI_SPEC void CigiSwap2( void *dest, const void *src)
{
static Cigi_uint16 d, s;
s = *( ( Cigi_uint16 *)src);
d = s << 8;
d |= s >> 8;
*( ( Cigi_uint16 *)dest) = d;
}
// ====================================================================
// CigiSwap4
// ====================================================================
CIGI_SPEC void CigiSwap4( void *dest, const void *src)
{
static SWAP_UNION d, s;
s.i = *( ( Cigi_uint32 *)src);
d.b[0] = s.b[3];
d.b[1] = s.b[2];
d.b[2] = s.b[1];
d.b[3] = s.b[0];
*( ( Cigi_uint32 *)dest) = d.i;
}
// ====================================================================
// CigiSwap8
// ====================================================================
CIGI_SPEC void CigiSwap8( void *dest, const void *src)
{
static SWAP_UNION d1, s1;
static SWAP_UNION d2, s2;
/* Do each word separately. Each pair of variables should be enclosed within
* braces to minimize the number of variables declared as "register."
*/
s1.i = *( ( Cigi_uint32 *)src);
s2.i = *( ( Cigi_uint32 *)src + 1);
d1.b[0] = s1.b[3];
d1.b[1] = s1.b[2];
d1.b[2] = s1.b[1];
d1.b[3] = s1.b[0];
d2.b[0] = s2.b[3];
d2.b[1] = s2.b[2];
d2.b[2] = s2.b[1];
d2.b[3] = s2.b[0];
*( ( Cigi_uint32 *)dest) = d2.i;
*( ( Cigi_uint32 *)dest + 1) = d1.i;
}
// ====================================================================
// CigiSwap8
// ====================================================================
CIGI_SPEC void CigiCopy8( void *dest, const void *src)
{
Cigi_uint32 *tDest = (Cigi_uint32 *)dest;
Cigi_uint32 *tSrc = (Cigi_uint32 *)src;
*tDest++ = *tSrc++;
*tDest = *tSrc;
}
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