SARC Files are uncompressed archive files used in Wii U applications and games, including Mario Kart 8. They are similar to the U8 (ARC) files found in GameCube and Wii games.
File Format
The file begins with a 16 bytes long header, and is followed by a file system and a list of filenames that are included in the archive. All values are big endian.
| Offset |
Size |
Description
|
| 0x00 |
4 |
0x53415243 ("SARC") file identifier.
|
| 0x04 |
2 |
Unknown. Always 0x0014?
|
| 0x06 |
2 |
Byte order mark. Always 0xfeff?
|
| 0x08 |
4 |
Total archive file size.
|
| 0x0c |
4 |
Offset for beginning of data.
|
| 0x10 |
End of header
|
File Table
| Offset |
Type |
Description
|
| 0x00 |
4 |
0x53464154 ("SFAT") file identifier.
|
| 0x04 |
2 |
Unknown. Always 0x000c?
|
| 0x06 |
2 |
Amount of nodes.
|
| 0x08 |
4 |
Unknown. Always 0x00000065?
|
| 0x0c |
End of header
|
Node
| Offset |
Size |
Description
|
| 0x00 |
4 |
unknown
|
| 0x04 |
1 |
Unknown. Always 0x01?
|
| 0x05 |
3 |
Offset of string table entry, relative to the end of the file name table header, divided by 4.
|
| 0x08 |
4 |
Beginning of node file data relative to the starting offset specified in the SARC header.
|
| 0x0c |
4 |
End of node file data relative to the starting offset specified in the SARC header.
|
| 0x10 |
End of node
|
File Name Table
The header is immediately followed by 4-byte aligned null-terminated strings that represent the filenames of the packed files.
| Offset |
Type |
Description
|
| 0x00 |
4 |
0x53464e54 ("SFNT") file identifier.
|
| 0x04 |
4 |
Unknown. Always 0x00080000?
|
| 0x08 |
End of header
|
File Data
The data begins at the variable value specified in the SARC header. There is padding between the files for 256-byte (0x100) alignment.
Tools
The following tool can extract SARC files: