mirror of https://github.com/lianthony/NT4.0
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
1.2 KiB
63 lines
1.2 KiB
/*************************** Module Header ********************************
|
|
* Align4
|
|
* Converts a non-aligned, big endian (e.g. 80386) value and returns
|
|
* it as an integer, with the correct byte alignment.
|
|
*
|
|
* RETURNS:
|
|
* The converted value.
|
|
*
|
|
* HISTORY:
|
|
* 15:39 on Fri 31 Jan 1992 -by- Lindsay Harris [lindsayh]
|
|
* Moved from rasdd.
|
|
*
|
|
* 17:15 on Tue 05 Mar 1991 -by- Lindsay Harris [lindsayh]
|
|
* Version 1
|
|
*
|
|
*
|
|
* Copyright (C) 1992 Microsoft Corporation.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
typedef unsigned char BYTE;
|
|
typedef unsigned long DWORD;
|
|
|
|
long
|
|
Align4( pb )
|
|
BYTE *pb;
|
|
{
|
|
static int iType = 0;
|
|
|
|
union
|
|
{
|
|
DWORD dw;
|
|
BYTE b[2];
|
|
} UW; /* Word/byte ordering */
|
|
|
|
if( iType == 0 )
|
|
{
|
|
/* Need to determine byte/word relationships */
|
|
UW.b[ 0 ] = 0x01;
|
|
UW.b[ 1 ] = 0x02;
|
|
UW.b[ 2 ] = 0x03;
|
|
UW.b[ 3 ] = 0x04;
|
|
|
|
iType = UW.dw == 0x01020304 ? 1 : 2;
|
|
}
|
|
|
|
if( iType == 2 )
|
|
{
|
|
UW.b[ 0 ] = *pb++;
|
|
UW.b[ 1 ] = *pb++;
|
|
UW.b[ 2 ] = *pb++;
|
|
UW.b[ 3 ] = *pb;
|
|
}
|
|
else
|
|
{
|
|
UW.b[ 3 ] = *pb++;
|
|
UW.b[ 2 ] = *pb++;
|
|
UW.b[ 1 ] = *pb++;
|
|
UW.b[ 0 ] = *pb;
|
|
}
|
|
|
|
return UW.dw;
|
|
}
|