515 lines
16 KiB
C
515 lines
16 KiB
C
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/*++
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Copyright (c) 1998 Microsoft Corporation
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Module Name:
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cmmprops.h
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Abstract:
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This module contains the definition of the property search class
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Author:
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Keith Lau (keithlau@microsoft.com)
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Revision History:
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keithlau 03/02/98 created
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--*/
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#ifndef _PROPS_H_
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#define _PROPS_H_
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#include "blockmgr.h"
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#include "propid.h"
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#include "mailmsgprops.h"
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/*
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This file defines a generice class for property tables. The following is
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the terminology used in relation to property tables:
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Search key - A value used to uniquely identify a property
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Property - A tuple consisting of a { Property Identifier, Value } pair.
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Property Identifier - the search key for the property table. The property
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table class does not restrict the data type or length of the property
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identifier, but rather, the caller must specify the length of the
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property identifier and provide a compare function when an instance
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of the property table is created.
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Value - A tuple consisting of a { Offset, Length } pair. The offset points
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to the physical location of the value and its length is specified by
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the Length element.
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Property Table - A collection of properties keyed off the designated
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property identifier.
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A property table contains an instance info record (PROPERTY_TABLE_INSTANCE),
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which describes the parameters of the table, such as the length of each
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property item record (PROPERTY_ITEM), how many items fit in a fragment
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(PROPERTY_TABLE_FRAGMENT), and a link to the first fragment.
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Fragments are linked together and thus a property table can hold an
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arbitrarily larger number of properties, until the identifier space is
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exhausted. Fragments contain property item records, each item record
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contains an ordered tuple: { Offset, Length, Max Length, Property Identifier }
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In the definition of PROPERTY_ITEM, the Property Identifier element is not
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explicitly defined, but it is implied that whatever follows Max Length
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is the property identifier. This allows maximum flexibility for different
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search key types. Similarly, although PROPERTY_TABLE_FRAGMENT does not
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include an array of PROPERTY_ITEMs, it is implied that an array of item
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records follow after faNextFragment. The size of the property identifier field
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is specified during instance creation so the size of each property item
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is fixed and known at run time.
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Since the property identifiers can be of different sizes, the creator must
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provide a function that knows how to compare a search key against a
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property item.
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A memory manager must be specified when the property table is created.
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This provides a mechanism for memory to be allocated and released in
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a linear, flat address space.
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*/
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// Define the well-known property item structure. We will have a sorted
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// array of these items that make up the list of well-known properties.
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//
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// Arrays of this type MUST be sorted for correct search results.
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typedef struct _INTERNAL_PROPERTY_ITEM
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{
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PROP_ID idProp; // Prop ID
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DWORD dwIndex; // Reserved index of this prop ID
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} INTERNAL_PROPERTY_ITEM, *LPINTERNAL_PROPERTY_ITEM;
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// Define a generic structure to represent a property in the property
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// table
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// Each property table that uses this class as the accessor must have
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// an item structure that includes this structure as its first member
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typedef struct _PROPERTY_ITEM
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{
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FLAT_ADDRESS faOffset; // Offset in flat space to value
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DWORD dwSize; // Size of value data in bytes
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DWORD dwMaxSize; // Max size allocated for value
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} PROPERTY_ITEM, *LPPROPERTY_ITEM;
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// Define a generic structure to describe a fragment in the property table
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typedef struct _PROPERTY_TABLE_FRAGMENT
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{
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DWORD dwSignature; // Signature of fragment
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FLAT_ADDRESS faNextFragment; // Link to next fragment
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} PROPERTY_TABLE_FRAGMENT, *LPPROPERTY_TABLE_FRAGMENT;
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// Define a function type specifying the generic compare function passed
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// into the search routine
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//
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// Arguments:
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// LPVOID - pointer to search key value, the compare function must have
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// intimate knowledge of how to retrieve the property key from
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// the pointer and its size.
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// LPPROPERTY_ITEM - pointer to item to compare against. The compare
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// function must have intimate knowledge of how to retrieve the
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// property key from the item pointer. The actual size of this
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// structure is in PROPERTY_TABLE_INSTANCE.dwItemSize.
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//
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// Return values:
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// SUCCESS(HRESULT) - The item matches the search key
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// !SUCCESS(HRESULT) - The item does not match the search key
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//
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typedef HRESULT (*LPPROPERTY_COMPARE_FUNCTION)(LPVOID, LPPROPERTY_ITEM);
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// Define a generic structure to describe the property table instance
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// Each property table that uses this class as the accessor must have
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// an instance structure that includes this structure as its first member
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typedef struct _PROPERTY_TABLE_INSTANCE
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{
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DWORD dwSignature; // Signature of instance
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FLAT_ADDRESS faFirstFragment;// Link to first fragment
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DWORD dwFragmentSize; // Size of each fragment
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DWORD dwItemBits; // # lower bits that represent the item
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DWORD dwItemSize; // Size of a specific PROPERTY_ITEM
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DWORD dwProperties; // # properties in this instance
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FLAT_ADDRESS faExtendedInfo; // Link to any specific extended into
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} PROPERTY_TABLE_INSTANCE, *LPPROPERTY_TABLE_INSTANCE;
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// Enumerate the different applications of the property table
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// This is used to track what kind of table we are looking at for debugging
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typedef enum _PROPERTY_TABLE_TYPES
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{
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PTT_INVALID_TYPE = 0, // Default value
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PTT_PROPERTY_TABLE, // Standard property table
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PTT_RECIPIENT_TABLE, // Recipient table
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PTT_PROP_ID_TABLE // Prop ID management table
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} PROPERTY_TABLE_TYPES;
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// Enumerate the different types of operations GetOrSetNextExistingItem
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// supports
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typedef enum _PROPERTY_ITEM_OPERATIONS
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{
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PIO_INVALID_TYPE = 0, // Default value
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PIO_READ_ITEM, // Normal read
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PIO_WRITE_ITEM, // Normal write
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PIO_ATOMIC_WRITE_ITEM // Protected write
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} PROPERTY_ITEM_OPERATIONS;
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#include "cmmtypes.h"
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// =================================================================
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// class for accessing items from the property table. This class
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// hides the details of fragmentation.
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//
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// This class is single-threaded
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//
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class CPropertyTableItem
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{
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public:
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CPropertyTableItem(
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CBlockManager *pBlockManager,
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LPPROPERTY_TABLE_INSTANCE pInstanceInfo
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);
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~CPropertyTableItem();
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HRESULT AddItem(
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LPPROPERTY_ITEM pItem,
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DWORD *pdwIndex,
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FLAT_ADDRESS *pfaOffsetToItem = NULL
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);
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HRESULT UpdateItem(
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DWORD dwIndex,
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LPPROPERTY_ITEM pItem,
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FLAT_ADDRESS *pfaOffsetToItem = NULL
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);
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HRESULT GetItemAtIndex(
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DWORD dwIndex,
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LPPROPERTY_ITEM pItem,
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LPFLAT_ADDRESS pfaOffset = NULL
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);
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HRESULT GetNextItem(
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LPPROPERTY_ITEM pItem
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);
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HRESULT GetOffsetToCurrentItem(
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FLAT_ADDRESS *pfaOffset
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)
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{ if (pfaOffset) *pfaOffset = m_faOffsetToCurrentItem; return(S_OK); }
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private:
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HRESULT GetOrSetNextExistingItem(
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// This looks at m_dwCurrentItem for index
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LPPROPERTY_ITEM pItem,
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DWORD dwOperation,
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LPFLAT_ADDRESS pfaOffset = NULL
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);
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HRESULT ReadFragmentFromFragmentNumber(
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DWORD dwFragmentNumber
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);
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HRESULT ReadFragment(
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FLAT_ADDRESS faOffset
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);
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public:
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HRESULT ReadItem(
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FLAT_ADDRESS faOffset,
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LPPROPERTY_ITEM pItem
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);
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private:
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HRESULT WriteItem(
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FLAT_ADDRESS faOffset,
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LPPROPERTY_ITEM pItem,
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BOOL fAtomic
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);
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// Info of parent instance
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LPPROPERTY_TABLE_INSTANCE m_pInstanceInfo;
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// Current fragment being processed
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BOOL m_fLoaded;
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PROPERTY_TABLE_FRAGMENT m_Fragment;
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DWORD m_dwCurrentFragment;
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FLAT_ADDRESS m_faOffsetToFragment;
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DWORD m_dwCurrentItem;
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DWORD m_dwCurrentItemInFragment;
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FLAT_ADDRESS m_faOffsetToCurrentItem;
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// Memory manager pointer and context for fast access
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CBlockManager *m_pBlockManager;
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CBlockContext m_bcContext;
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};
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// =================================================================
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// class for accessing an instance of a property table
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//
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class CPropertyTable
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{
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public:
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CPropertyTable(
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PROPERTY_TABLE_TYPES pttTableType,
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DWORD dwValidSignature,
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CBlockManager *pBlockManager,
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LPPROPERTY_TABLE_INSTANCE pInstanceInfo,
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LPPROPERTY_COMPARE_FUNCTION pfnCompare,
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const LPINTERNAL_PROPERTY_ITEM pInternalProperties = NULL,
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DWORD dwInternalProperties = 0
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);
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~CPropertyTable();
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BOOL IsValid();
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BOOL IsInstanceInfoValid();
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//
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// Method to return the property count
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//
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// GetCount - Returns the current property count
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//
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// Arguments
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// pdwCount - Pointer to DWORD to return count
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//
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// Return values
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//
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// S_OK - Succeeded
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//
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HRESULT GetCount(
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DWORD *pdwCount
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);
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//
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// Method to create or update a property item and value given a search key
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//
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// PutProperty - Creates the specified property if the property does not
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// exist, or updates the value of the property otherwise.
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//
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// Arguments
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// pvPropKey - Pointer to the search key
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// pItem - Pointer to the property item to write
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// dwSize - Size of property value data
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// pbValue - Pointer to property value data. If this value is NULL,
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// then no data is written, only the item record is created
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// or updated. dwSize must also be zero.
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//
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// Return values
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//
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// S_OK - Succeeded, property already exists, but the
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// value is updated as specified.
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// S_FALSE - Succeeded, new property is created
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// STG_E_INVALIDPARAMETER - Error, one or more parameters are invalid, or
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// otherwise inconsistent.
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// STG_E_WRITEFAULT - Error, The write failed to complete.
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// TYPE_E_OUTOFBOUNDS - Debug Error, a write is issued to write past
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// the current allocated block.
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//
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HRESULT PutProperty(
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LPVOID pvPropKey,
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LPPROPERTY_ITEM pItem,
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DWORD dwSize,
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LPBYTE pbValue
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);
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//
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// Method to retrieve a property item given a search key
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//
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// GetPropertyItem - Attempts to find the property item specified by the
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// Search key. If found, the property item record will
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// be returned.
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//
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// Arguments
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// pvPropKey - Pointer to the search key
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// pItem - Pointer to the property item to return, sufficient space
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// must be allocated by the caller to hold the property item
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//
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// Return values
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//
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// S_OK - Succeeded
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// STG_E_UNKNOWN - Error, specified property not found.
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// STG_E_INVALIDPARAMETER - Error, one or more parameters are invalid, or
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// otherwise inconsistent.
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// STG_E_READFAULT - Error, The read failed to complete.
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// TYPE_E_OUTOFBOUNDS - Debug Error, a read is issued to write past
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// the current allocated block.
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//
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HRESULT GetPropertyItem(
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LPVOID pvPropKey,
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LPPROPERTY_ITEM pItem
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);
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//
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// Method to retrieve a property item and its associated value
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//
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// GetPropertyItemAndValue - Attempts to find the property item specified
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// by the Search key. If found, the property item record, as
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// well as the value data will be returned.
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//
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// Arguments
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// pvPropKey - Pointer to the search key
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// pItem - Pointer to the property item to return, sufficient space
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// must be allocated by the caller to hold the property item
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// dwLength - Size of buffer allocated for value data
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// pdwLengthRead- Size of value data actually read, if the provided buffer is
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// insufficient, then the full length of the property data is
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// returned.
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// pbValue - Pointer to return property value data.
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//
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// Return values
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//
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// S_OK - Succeeded
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// STG_E_UNKNOWN - Error, specified property not found.
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// HRESULT_FROM_WIN32(ERROR_MORE_DATA) - Error, the buffer provided is not
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// large enough to hold all the value data.
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// *pdwLengthRead returns the full length. *pItem
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// would still return the item record in this case.
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// STG_E_INVALIDPARAMETER - Error, one or more parameters are invalid, or
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// otherwise inconsistent.
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// STG_E_READFAULT - Error, The read failed to complete.
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// TYPE_E_OUTOFBOUNDS - Debug Error, a read is issued to write past
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// the current allocated block.
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//
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HRESULT GetPropertyItemAndValue(
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LPVOID pvPropKey,
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LPPROPERTY_ITEM pItem,
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DWORD dwLength,
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DWORD *pdwLengthRead,
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LPBYTE pbValue
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);
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//
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// Method to retrieve a property item and its associated value, using an
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// internal index instead of a search key.
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//
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||
|
|
// GetPropertyItemAndValueUsingIndex - Attempts to find the property item
|
||
|
|
// specified by the Search key. If found, the property item
|
||
|
|
// record, as well as the value data will be returned.
|
||
|
|
//
|
||
|
|
// Arguments
|
||
|
|
// dwIndex - Index of item to retrieve, this is actually the dwIndex'th
|
||
|
|
// item in the property table. One can walk the entire table
|
||
|
|
// using this method.
|
||
|
|
// pItem - Pointer to the property item to return, sufficient space
|
||
|
|
// must be allocated by the caller to hold the property item
|
||
|
|
// dwLength - Size of buffer allocated for value data
|
||
|
|
// pdwLengthRead- Size of value data actually read, if the provided buffer is
|
||
|
|
// insufficient, then the full length of the property data is
|
||
|
|
// returned.
|
||
|
|
// pbValue - Pointer to return property value data.
|
||
|
|
//
|
||
|
|
// Return values
|
||
|
|
//
|
||
|
|
// S_OK - Succeeded
|
||
|
|
// STG_E_UNKNOWN - Error, specified property not found.
|
||
|
|
// HRESULT_FROM_WIN32(ERROR_MORE_DATA) - Error, the buffer provided is not
|
||
|
|
// large enough to hold all the value data.
|
||
|
|
// *pdwLengthRead returns the full length. *pItem
|
||
|
|
// would still return the item record in this case.
|
||
|
|
// STG_E_INVALIDPARAMETER - Error, one or more parameters are invalid, or
|
||
|
|
// otherwise inconsistent.
|
||
|
|
// STG_E_READFAULT - Error, The read failed to complete.
|
||
|
|
// TYPE_E_OUTOFBOUNDS - Debug Error, a read is issued to write past
|
||
|
|
// the current allocated block.
|
||
|
|
//
|
||
|
|
HRESULT GetPropertyItemAndValueUsingIndex(
|
||
|
|
DWORD dwIndex,
|
||
|
|
LPPROPERTY_ITEM pItem,
|
||
|
|
DWORD dwLength,
|
||
|
|
DWORD *pdwLengthRead,
|
||
|
|
LPBYTE pbValue
|
||
|
|
);
|
||
|
|
|
||
|
|
private:
|
||
|
|
|
||
|
|
// Method to search the property table and return the associated
|
||
|
|
// property item, if found
|
||
|
|
HRESULT SearchForProperty(
|
||
|
|
LPVOID pvPropKey,
|
||
|
|
LPPROPERTY_ITEM pItem,
|
||
|
|
DWORD *pdwIndexToItem,
|
||
|
|
FLAT_ADDRESS *pfaOffsetToItem
|
||
|
|
);
|
||
|
|
|
||
|
|
//
|
||
|
|
// map a propid into an array index into m_rgWellKnownProps. returns
|
||
|
|
// -1 if the prop isn't well known
|
||
|
|
//
|
||
|
|
int MapCachedProp(DWORD iPropId) {
|
||
|
|
if (m_cCachedProps &&
|
||
|
|
iPropId >= m_iCachedPropsBase &&
|
||
|
|
iPropId < m_iCachedPropsBase + m_cCachedProps)
|
||
|
|
{
|
||
|
|
int i = iPropId - m_iCachedPropsBase;
|
||
|
|
_ASSERT(i < (int) m_cCachedProps);
|
||
|
|
return i;
|
||
|
|
} else {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Initialize the property cache
|
||
|
|
//
|
||
|
|
void InitializePropCache();
|
||
|
|
|
||
|
|
//
|
||
|
|
// set an item in the property cache. to invalidate an item pass in
|
||
|
|
// INVALID_FLAT_ADDRESS for fa.
|
||
|
|
//
|
||
|
|
void UpdatePropCache(LPPROPERTY_ITEM pItem,
|
||
|
|
FLAT_ADDRESS fa,
|
||
|
|
DWORD dwIndex);
|
||
|
|
|
||
|
|
DWORD m_dwSignature;
|
||
|
|
DWORD m_dwTableType;
|
||
|
|
DWORD m_dwValidInstanceSignature;
|
||
|
|
|
||
|
|
// Keep a local instance structure, and track the offset to the
|
||
|
|
// copy in flat space
|
||
|
|
PROPERTY_TABLE_INSTANCE *m_pInstanceInfo;
|
||
|
|
|
||
|
|
// List of well-known properties, we will use the count to determine
|
||
|
|
// whether there are any well-known properties
|
||
|
|
//
|
||
|
|
// Note that well-known
|
||
|
|
LPINTERNAL_PROPERTY_ITEM m_pInternalProperties;
|
||
|
|
DWORD m_dwInternalProperties;
|
||
|
|
|
||
|
|
// Function pointer to do property comparisons
|
||
|
|
LPPROPERTY_COMPARE_FUNCTION m_pfnCompare;
|
||
|
|
|
||
|
|
// Memory manager to use
|
||
|
|
CBlockManager *m_pBlockManager;
|
||
|
|
|
||
|
|
// this structure is used for each item in the cache.
|
||
|
|
typedef struct {
|
||
|
|
// the flat address for this item, or INVALID_FLAT_ADDRESS if its not in the cache
|
||
|
|
FLAT_ADDRESS fa;
|
||
|
|
// its index
|
||
|
|
DWORD dwIndex;
|
||
|
|
} PROPCACHEITEM;
|
||
|
|
|
||
|
|
// array of cached property offsets for the predefined properties.
|
||
|
|
// if its GLOBAL_PTABLE_INSTANCE_SIGNATURE_VALID
|
||
|
|
// then this has the prop ids from IMMPID_MP_BEFORE+1 to IMMPID_MP_AFTER
|
||
|
|
// otherwise this will be NULL
|
||
|
|
//
|
||
|
|
// There is no reason to cache recipient property offsets at this
|
||
|
|
// time since the recipient property table is instantiated, used
|
||
|
|
// once, then thrown away. we'd spend more time making the cache
|
||
|
|
// then the linear search in SearchForProperty costs
|
||
|
|
PROPCACHEITEM *m_rgCachedProps;
|
||
|
|
DWORD m_iCachedPropsBase;
|
||
|
|
DWORD m_cCachedProps;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|