System.Classes.TStream.Seek
Delphi
function Seek(Offset: Longint; Origin: Word): Longint; overload; virtual;
function Seek(const Offset: Int64; Origin: TSeekOrigin): Int64; overload; virtual;
function Seek(const Offset: Int64; Origin: Word): Int64; overload; inline;
C++
virtual int __fastcall Seek(int Offset, System::Word Origin)/* overload */;
virtual __int64 __fastcall Seek(const __int64 Offset, TSeekOrigin Origin)/* overload */;
__int64 __fastcall Seek(const __int64 Offset, System::Word Origin)/* overload */;
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| function | public | System.Classes.pas System.Classes.hpp |
System.Classes | TStream |
Description
Moves to a specified position in the streamed resource.
Call Seek to move the current position of the stream in its particular storage medium (such as memory or a disk file).
The Origin parameter indicates how to interpret the Offset parameter. Origin should be one of the following values:
| Value | Meaning |
|---|---|
|
soBeginning |
Offset is from the beginning of the resource. Seek moves to the position Offset. Offset must be >= 0. |
|
soCurrent |
Offset is from the current position in the resource. Seek moves to Position + Offset. |
|
soEnd |
Offset is from the end of the resource. Offset must be <= 0 to indicate a number of bytes before the end of the file. |
Seek returns the new value of the Position property.
Seek is called by the Position and Size properties.
Note: As implemented in TStream, the two versions (the 32-bit or 64-bit syntax) call each other. Descendent stream classes must override at least one of these versions, and the override must not call the inherited default implementation.