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