VFS: understanding the Index file layout

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Revision as of 13:31, 5 February 2007 by Blakar Ogre (talk | contribs)
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On this page you can find a short description of the index file layout including some basic nice to knows.

The index-file contains 34-byte long records which contain the following fields (listed in order):
Location (4 Bytes): The location within the cache file counted in bytes from start of file.
Length (4 Bytes): The reserved amount of space in the cache file for this item, counted in bytes (multiples of 1024 as 1024 is the block size)
Accesstime (4 Bytes): Timestamp of last access, is updated when file is read from cache and is set on intial addition in the cache. Counted in seconds since 1/1/1970 (commonly known as unix time or POSIX time)
UUID (16 Bytes): The unique ID of the asset
Filetype (2 Bytes): The asset type, mostly 0 (textures)
Size (4 Bytes): The size, counted in bytes, of the data currently stored for this asset. This can be significantly lower than the Length

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