TDosStream

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

DOS file stream

Declaration

Source position: objects.pp line 345

Type
  TDosStream = object (TStream)
    Handle : THandle;
    FName : AsciiZ;
    constructor Init(FileName: FNameStr; Mode: Word);
    destructor Done;  Virtual;
    procedure Close;  Virtual;
    procedure Truncate;  Virtual;
    procedure Seek(Pos: LongInt);  Virtual;
    procedure Open(OpenMode: Word);  Virtual;
    procedure Read(var Buf; Count: LongInt);  Virtual;
    procedure Write(var Buf; Count: LongInt);  Virtual;
  private
    FileInfo : File;
  end
  ;

Description

TDosStream is a stream that stores it's contents in a file. it overrides a couple of methods of TStream for this.

In addition to the fields inherited from TStream (see TStream ), there are some extra fields, that describe the file. (mainly the name and the OS file handle)

No buffering in memory is done when using TDosStream. All data are written directly to the file. For a stream that buffers in memory, see TBufStream .

Members

Member	Type	Visibility	Description
Close	Method	default	Close the file.
Done	Method	default	Closes the file and cleans up the instance.
FileInfo	Field	private
FName	Field	default	File name
Handle	Field	default	OS file handle for stream
Init	Method	default	Instantiate a new instance of TDosStream.
Open	Method	default	Open the file stream
Read	Method	default	Read data from the stream to a buffer.
Seek	Method	default	Set file position.
Truncate	Method	default	Truncate the file on the current position.
Write	Method	default	Write data from a buffer to the stream.

Inheritance

Class	Description
TDosStream	DOS file stream