Archive Sector

An archive as it is stored: a chain of fixed size sectors scattered through the data file, still compressed.

TCacheIndex.ReadArchiveSector walks that chain and hands back the bytes; TArchiveSector.Decompress turns them into the archive’s contents.

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ArchiveSector.Create

function TArchiveSector.Create(position, size: Integer; big: Boolean): TArchiveSector; static;

An empty sector chain of size bytes starting at position in the data file.

big marks an archive whose id needs 4 bytes rather than 2, which makes its sector headers two bytes longer and leaves that much less room for data in each one.

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ArchiveSector.Decompress

function TArchiveSector.Decompress(): TByteArray;

The name of the function should be self explanatory, decompresses the compressed data in the current archive sector.