Leaked source code of windows server 2003
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//+-------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1994 - 1994.
//
// File: propdata.hxx
//
// Contents: Static tables describing types of properties
//
// Classes: CTableVariant - PROPVARIANT wrapper; adds useful methods
//
// History: 28 Jan 1994 AlanW Created
//
//--------------------------------------------------------------------------
#pragma once
//
// PropType gives the type of standard properties
//
struct PROP_TYPE { PROPID propid; // a standard property ID
VARENUM vtPropType; // the guaranteed type of propid
};
extern const PROP_TYPE aPropType[];
extern const unsigned cPropType;
//+-------------------------------------------------------------------------
//
// Function: PropIdToType, inline public
//
// Synopsis: If the input propid is a system property, return its type.
//
// Arguments: [prop] - the property ID to be mapped
//
// Returns: VARENUM - the variant type of the property if it is in
// the mapping table; VT_NULL otherwise.
//
//--------------------------------------------------------------------------
inline VARENUM PropIdToType (PROPID prop){ for (unsigned iProp = 0; iProp < cPropType; iProp++) {
if (aPropType[iProp].propid == prop) return aPropType[iProp].vtPropType; } return VT_NULL;}
//+-------------------------------------------------------------------------
//
// Macro: ALIGN
//
// Synopsis: Align a pointer, ptr, to an address alignment, algn.
//
// Effects: The input parameter ptr is modified.
//
// Arguments: [ptr] - the pointer to be aligned
// [algn] - the unit of alignment
//
// Requires: algn must be a power of two.
// ptr must be an lvalue, typically a pointer to byte.
//
//--------------------------------------------------------------------------
#define ALIGN(ptr, algn) ((ptr) = (((ptr) + ((algn)-1)) & (~(algn-1))))
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