TIDEADeCryptStream.Seek function

Member of TIDEADeCryptStreampublicIn unit Idea

Set position on the stream.

Declaration

pascal

function Seek(const Offset: Int64; Origin: TSeekOrigin): Int64
 ; override

Arguments

`Offset`	Offset to apply to the position in the stream.
`Origin`	Origin from where `Offset` should be counted.

Function result

New position in the stream.

Description

Seek will only work on a forward seek. It emulates a forward seek by reading and discarding bytes from the input stream. The TIDEADecryptStream stream tries to provide seek capabilities for the following limited number of cases:

Origin=soFromBeginning: If Offset is larger than the current position, then the remaining bytes are skipped by reading them from the stream and discarding them.
Origin=soFromCurrent: If Offset is zero, the current position is returned. If it is positive, then Offset bytes are skipped by reading them from the stream and discarding them.

Errors

An EIDEAError exception is raised if the stream does not allow the requested seek operation.