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edits
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A ZIM file starts with a header. This starts always at offset 0. | A ZIM file starts with a header. This starts always at offset 0. | ||
Length in byte, all types are littlendian | Length in byte, all types are littlendian. | ||
{|{{Prettytable}} | {|{{Prettytable}} | ||
! Field Name !! Type !! Offset !! Length !! Description | ! Field Name !! Type !!Offset!!Length!! Description | ||
|- | |- | ||
| magicNumber || integer || | | magicNumber || integer || 0 || 4 || Magic number to recognise the file format, must be 72173914 | ||
|- | |- | ||
| version || integer || | | version || integer || 4 || 4 || ZIM=5, bytes 1-2: major, bytes 3-4: minor version of the ZIM file format | ||
|- | |- | ||
| uuid || integer || | | uuid || integer || 8 || 16 || unique id of this zim file | ||
|- | |- | ||
| articleCount || integer || 24 || | | articleCount || integer || 24 || 4 || total number of articles | ||
|- | |- | ||
| clusterCount || integer || 28 || | | clusterCount || integer || 28 || 4 || total number of clusters | ||
|- | |- | ||
| urlPtrPos || integer || 32 || | | urlPtrPos || integer || 32 || 8 || position of the directory pointerlist orderes by URL | ||
|- | |- | ||
| titlePtrPos || integer || 40 || | | titlePtrPos || integer || 40 || 8 || position of the directory pointerlist ordered by Title | ||
|- | |- | ||
| clusterPtrPos || integer || 48 || | | clusterPtrPos || integer || 48 || 8 || position of the cluster pointer list | ||
|- | |- | ||
| mimeListPos || integer || 56 || | | mimeListPos || integer || 56 || 8 || position of the MIME type list (also header size) | ||
|- | |- | ||
| mainPage || integer || 64 || | | mainPage || integer || 64 || 4 || main page or 0xffffffff if no main page | ||
|- | |- | ||
| layoutPage || integer || 68 || | | layoutPage || integer || 68 || 4 || layout page or 0xffffffffff if no layout page | ||
|} | |} | ||