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//+-------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1992 - 1993.
//
// File: Align.hxx
//
// Contents: Alignment routines (for MIPS)
//
// History: 14-Jun-93 KyleP Created
//
//--------------------------------------------------------------------------
#if !defined( __ALIGN_HXX__ )
#define __ALIGN_HXX__
//+-------------------------------------------------------------------------
//
// Function: AlignWCHAR, public
//
// Synopsis: Half-word aligns argument
//
// Arguments: [pb] -- Pointer to half-word align
// [cbAlign] -- # Bytes moved to satisfy alignment
//
// Returns: [pb] incremented forward as necessary for half-word alignment
//
// History: 14-Jun-93 KyleP Created
//
//--------------------------------------------------------------------------
inline unsigned short * AlignWCHAR( unsigned char * pb,
unsigned * pcbAlign = 0 );
inline unsigned short * AlignUSHORT( unsigned char * pb,
unsigned * pcbAlign = 0 );
inline unsigned short * AlignWCHAR( unsigned char * pb,
unsigned * pcbAlign )
{
return( AlignUSHORT( pb, pcbAlign ) );
}
inline unsigned short * AlignUSHORT( unsigned char * pb,
unsigned * pcbAlign )
{
if ( pcbAlign )
*pcbAlign = (sizeof(unsigned short) -
((int)pb & (sizeof(unsigned short) - 1))) %
sizeof(unsigned short);
return( (unsigned short *)( ((int)pb + sizeof(unsigned short) - 1) &
~(sizeof(unsigned short) - 1 ) ) );
}
//+-------------------------------------------------------------------------
//
// Function: AlignULONG, public
//
// Synopsis: Word aligns argument
//
// Arguments: [pb] -- Pointer to word align
// [cbAlign] -- # Bytes moved to satisfy alignment
//
// Returns: [pb] incremented forward as necessary for word alignment
//
// History: 14-Jun-93 KyleP Created
//
//--------------------------------------------------------------------------
inline unsigned long * AlignULONG( unsigned char * pb,
unsigned * pcbAlign = 0 );
inline unsigned long * AlignULONG( unsigned char * pb,
unsigned * pcbAlign )
{
if ( pcbAlign )
*pcbAlign = (sizeof(unsigned long) -
((int)pb & (sizeof(unsigned long) - 1))) %
sizeof(unsigned long);
return( (unsigned long *)( ((int)pb + sizeof(unsigned long) - 1) &
~(sizeof(unsigned long) - 1 ) ) );
}
inline long * AlignLong( unsigned char * pb,
unsigned * pcbAlign = 0 );
inline long * AlignLong( unsigned char * pb,
unsigned * pcbAlign )
{
if ( pcbAlign )
*pcbAlign = (sizeof(long) -
((int)pb & (sizeof(long) - 1))) %
sizeof(long);
return( (long *)( ((int)pb + sizeof(long) - 1) &
~(sizeof(long) - 1 ) ) );
}
inline LONGLONG * AlignLONGLONG( unsigned char * pb,
unsigned * pcbAlign = 0 );
inline LONGLONG * AlignLONGLONG( unsigned char * pb,
unsigned * pcbAlign )
{
if ( pcbAlign )
*pcbAlign = (sizeof(LONGLONG) -
((int)pb & (sizeof(LONGLONG) - 1))) %
sizeof(LONGLONG);
return( (LONGLONG *)( ((int)pb + sizeof(LONGLONG) - 1) &
~(sizeof(LONGLONG) - 1 ) ) );
}
inline float * AlignFloat( unsigned char * pb,
unsigned * pcbAlign = 0 );
inline float * AlignFloat( unsigned char * pb,
unsigned * pcbAlign )
{
if ( pcbAlign )
*pcbAlign = (sizeof(float) -
((int)pb & (sizeof(float) - 1))) %
sizeof(float);
return( (float *)( ((int)pb + sizeof(float) - 1) &
~(sizeof(float) - 1 ) ) );
}
inline double * AlignDouble( unsigned char * pb,
unsigned * pcbAlign = 0 );
inline double * AlignDouble( unsigned char * pb,
unsigned * pcbAlign )
{
if ( pcbAlign )
*pcbAlign = (sizeof(double) -
((int)pb & (sizeof(double) - 1))) %
sizeof(double);
return( (double *)( ((int)pb + sizeof(double) - 1) &
~(sizeof(double) - 1 ) ) );
}
//+-------------------------------------------------------------------------
//
// Function: AlignGUID, public
//
// Synopsis: 8-byte aligns argument
//
// Arguments: [pb] -- Pointer to word align
// [cbAlign] -- # Bytes moved to satisfy alignment
//
// Returns: [pb] incremented forward as necessary for word alignment
//
// History: 29-Sep-93 KyleP Created
//
// Notes: This is somewhat error-prone code. 16-byte GUIDs are
// only 8-byte aligned, so we use sizeof(double) and not
// sizeof(GUID).
//
//--------------------------------------------------------------------------
inline unsigned char * AlignGUID( unsigned char * pb,
unsigned * pcbAlign = 0 );
inline unsigned char * AlignGUID( unsigned char * pb,
unsigned * pcbAlign )
{
if ( pcbAlign )
*pcbAlign = (sizeof(double) -
((int)pb & (sizeof(double) - 1))) %
sizeof(double);
return( (unsigned char *)( ((int)pb + sizeof(double) - 1) &
~(sizeof(double) - 1 ) ) );
}
//+-------------------------------------------------------------------------
//
// Function: StoreWCHAR, public
//
// Synopsis: Stores half word in byte-aligned memory
//
// Arguments: [pb] -- Buffer
// [hw] -- Half-word
//
// Returns: Number of bytes to increment [pb].
//
// History: 14-Jun-93 KyleP Created
//
//--------------------------------------------------------------------------
inline int StoreUSHORT( unsigned char * pb, unsigned short hw )
{
*((UNALIGNED unsigned short *)pb) = hw;
return( sizeof( unsigned short ) );
}
inline int StoreWCHAR( unsigned char * pb, unsigned short hw )
{
return( StoreUSHORT( pb, hw ) );
}
//+-------------------------------------------------------------------------
//
// Function: StoreULONG, public
//
// Synopsis: Stores word in byte-aligned memory
//
// Arguments: [pb] -- Buffer
// [w] -- Word
//
// Returns: Number of bytes to increment [pb].
//
// History: 14-Jun-93 KyleP Created
//
//--------------------------------------------------------------------------
inline int StoreULONG( unsigned char * pb, unsigned long w )
{
*((UNALIGNED unsigned long *)pb) = w;
return( sizeof( unsigned long ) );
}
inline int StoreUINT( unsigned char * pb, unsigned int w )
{
*((UNALIGNED unsigned int *)pb) = w;
return( sizeof( int ) );
}
//+-------------------------------------------------------------------------
//
// Function: LoadWCHAR, public
//
// Synopsis: Loads half word from byte-aligned memory
//
// Arguments: [pb] -- Buffer
// [hw] -- Half-word
//
// Returns: Number of bytes to increment [pb].
//
// History: 14-Jun-93 KyleP Created
//
//--------------------------------------------------------------------------
inline int LoadUSHORT( unsigned char const * const pb, unsigned short & hw )
{
hw = *((UNALIGNED unsigned short const *)pb);
return( sizeof( unsigned short ) );
}
inline int LoadWCHAR( unsigned char const * const pb, unsigned short & hw )
{
return( LoadUSHORT( pb, hw ) );
}
//+-------------------------------------------------------------------------
//
// Function: LoadULONG, public
//
// Synopsis: Loads word from byte-aligned memory
//
// Arguments: [pb] -- Buffer
// [w] -- Word
//
// Returns: Number of bytes to increment [pb].
//
// History: 14-Jun-93 KyleP Created
//
//--------------------------------------------------------------------------
inline int LoadULONG( unsigned char const * const pb, unsigned long & w )
{
w = *((UNALIGNED unsigned long const *)pb);
return( sizeof( unsigned long ) );
}
inline int LoadUINT( unsigned char const * const pb, unsigned int & w )
{
w = *((UNALIGNED unsigned int const *)pb);
return( sizeof( int ) );
}
#endif // __ALIGN_HXX__
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