Difference between revisions of "ARC"

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== Overview ==
 
== Overview ==
  
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ARC files are archives. Containers of files compressed with LZ-10 (more compression methods might be available).
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ARC files are compressed files.  
  
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This is very similiar to NARC (the DS archives).
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Found in [[BCMA|manual files] compressed with LZ-10
  
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== ARC header ==
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(more compression methods might be available).
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{| class="wikitable" border="1"
 
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!  Offset !!  Size !! Type !!  Description
 
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|-
 
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|  0x000 || 4 || char[4] || Magic Number 'darc'
 
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|-
 
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|  0x004 || 2 || uint16 || Endianess (=0xFFFE: Little)
 
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|-
 
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|  0x006 || 2 || uint16 || Header's length
 
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|-
 
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|  0x008 || 4 || uint32 || Unknown (= 0x01000000 ?)
 
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|-
 
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|  0x00C || 4 || uint32 || File's length
 
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|-
 
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|  0x010 || 4 || uint32 || [[ARC#File_table|File table]] offset (from the beginning of the file)
 
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|-
 
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|  0x014 || 4 || uint32 || [[ARC#File_table|File table]] length
 
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|-
 
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|  0x018 || 4 || uint32 || [[ARC#Files_data|Files data]] offset
 
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|}
 
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=== File table ===
 
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The file table starts at 0x01C.
 
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Each file struct consists of 3 uint32:
 
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{| class="wikitable" border="1"
 
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!  Offset !!  Size !! Type !!  Description
 
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|-
 
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|  0x00C || 4 || uint32 || Compressed file name offset (from the end of the table, padded to 0x10)
 
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if (offset & 0x01000000) then this is a folder (i.e. first two nodes 'null' & '.')
 
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|-
 
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|  0x004 || 4 || uint32 || Compressed file offset
 
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|-
 
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|  0x008 || 4 || uint32 || Compressed file length
 
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|}
 
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  * First two nodes in the file table are ‘null’ and ‘.’ both have compressed file length of 7.
 
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=== Files data ===
 
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  * Each file is compressed using LZ-10. (Starts with 0x10 and followed by uint24 of the uncompressed file size).
 
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  * Each file's end is padded to 0x10 besides the last one which ends with EOF.
 

Revision as of 21:12, 29 November 2012

This page documents the format of ARC.

Overview

ARC files are compressed files.

Found in [[BCMA|manual files] compressed with LZ-10

(more compression methods might be available).

Retrieved from "https://www.3dbrew.org/w/index.php?title=ARC&oldid=4380"