TStreamAdapter

[Properties (by Name)][Methods (by Name)][Events (by Name)]

Implements IStream for TStream descendants

Declaration

Source position: classesh.inc line 1315

Type
  TStreamAdapter = class (TInterfacedObject, IStream)
  private
    FStream : TStream;
    FOwnership : TStreamOwnership;
    m_bReverted : Boolean;
  public
    constructor Create(Stream: TStream; Ownership: TStreamOwnership);
    destructor Destroy;  Override;
    function Read(pv: Pointer; cb: DWORD; pcbRead: PDWord) : HRESULT
                 ;  Virtual;
    function Write(pv: Pointer; cb: DWORD; pcbWritten: PDWord) : HRESULT
                  ;  Virtual;
    function Seek(dlibMove: Largeint; dwOrigin: DWORD; 
                 out libNewPosition: LargeUint) : HRESULT;  Virtual;
    function SetSize(libNewSize: LargeUint) : HRESULT;  Virtual;
    function CopyTo(stm: IStream; cb: LargeUint; out cbRead: LargeUint; 
                   out cbWritten: LargeUint) : HRESULT;  Virtual;
    function Commit(grfCommitFlags: DWORD) : HRESULT;  Virtual;
    function Revert : HRESULT;  Virtual;
    function LockRegion(libOffset: LargeUint; cb: LargeUint; 
                       dwLockType: DWORD) : HRESULT;  Virtual;
    function UnlockRegion(libOffset: LargeUint; cb: LargeUint; 
                         dwLockType: DWORD) : HRESULT;  Virtual;
    function Stat(out statstg: TStatStg; grfStatFlag: DWORD) : HRESULT
                 ;  Virtual;
    function Clone(out stm: IStream) : HRESULT;  Virtual;
    Stream : TStream;
    StreamOwnership : TStreamOwnership;
  end
  ;

Members

Member	Type	Visibility	Description
Clone	Method	public	Clone the stream
Commit	Method	public	Commit data to the stream
CopyTo	Method	public	Copy data to destination stream
Create	Method	public	Create a new instance of TStreamAdapter
Destroy	Method	public	Free the TStreamAdapter instance
FOwnership	Field	private
FStream	Field	private
LockRegion	Method	public	Lock a region of the stream
m_bReverted	Field	private
Read	Method	public	Read from the stream.
Revert	Method	public	Revert operations on the stream
Seek	Method	public	Set the stream position
SetSize	Method	public	Set the stream size
Stat	Method	public	Return statistical data about the stream
Stream	Property	public	Stream on which adaptor works
StreamOwnership	Property	public	Determines what happens with the stream when the adaptor is freed
UnlockRegion	Method	public	Unlock a region of the stream
Write	Method	public	Write to the stream

Inheritance

Class	Description
TStreamAdapter(IStream)	Implements IStream for TStream descendants

See also

Name	Description
TStream	Base class for streams.
TStream	Base class for streams.
TStreamOwnership	Determines the ownership of a TStreamAdapter
TStreamOwnership	Determines the ownership of a TStreamAdapter

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