TBufStream¶

Buffered file stream.

Declaration¶

Source position: objects.pp line 386

type

  TBufStream = object(TDosStream)
    LastMode: Byte;
    BufSize: LongInt;
    BufPtr: LongInt;
    BufEnd: LongInt;
    Buffer: PByteArray = ^TByteArray;
    constructor Init;
    destructor Done;
    procedure Close;
    procedure Flush;
    procedure Truncate;
    procedure Seek;
    procedure Open;
    procedure Read;
    procedure Write;
  end;

Inheritance¶

Description¶

Bufstream implements a buffered file stream. That is, all data written to the stream is written to memory first. Only when the buffer is full, or on explicit request, the data is written to disk.

Also, when reading from the stream, first the buffer is checked if there is any unread data in it. If so, this is read first. If not the buffer is filled again, and then the data is read from the buffer.

The size of the buffer is fixed and is set when constructing the file.

This is useful if you need heavy throughput for your stream, because it speeds up operations.

Methods¶

Member	Visibility	Description
Close	default	Flush data and Close the file.
Done	default	Close the file and cleans up the instance.
Flush	default	FLush data from buffer, and write it to stream.
Init	default	Initialize an instance of TBufStream and open the file.
Open	default	Open the file if it is closed.
Read	default	Read data from the file to a buffer in memory.
Seek	default	Set current position in file.
Truncate	default	Flush buffer, and truncate the file at current position.
Write	default	Write data to the file from a buffer in memory.

See all Methods

Fieldss¶

Member	Visibility	Description
BufEnd	default	End of data in buffer.
Buffer	default	Actual buffer.
BufPtr	default	Pointer to current position in buffer.
BufSize	default	Size of buffer.
LastMode	default	Last file open mode.

See all Fieldss