File archive: Difference between revisions
Created page with ".wad file format is exactly the same as [https://worms2d.info/Graphics_directory Worms .dir format], only extension is different. {| class="wikitable" !Offset !Size !Descripti..." |
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|Magic, <code>44 49 52 1A</code> ( | |Magic, <code>44 49 52 1A</code> (<code>DIR\x1A</code>) | ||
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* file data spans up to the "address of directory". These two | * file data spans up to the "address of directory". These two points are optional, but they provide a nice alignment: | ||
** There is <code>1A 00</code> at the end of each file | ** There is <code>1A 00</code> at the end of each file | ||
** There may be <code>00</code> padding after that, so the next file/section starts at offset | ** There may be <code>00</code> padding after that, so the next file/section starts at offset aligned to 4 bytes | ||
Following offsets are counted from "Directory address" | Following offsets are counted from "Directory address" | ||
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* each entry value + "address of directory" is a pointer to corresponding ''file descriptor'' | * each entry value + "address of directory" is a pointer to corresponding ''file descriptor'' | ||
* each position is calculated, hash function is available at | * each position is calculated, hash function is available at https://worms2d.info/Graphics_directory | ||
each '''file descriptor''' have following structure: | each '''file descriptor''' have following structure: | ||
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|} | |} | ||
==== File descriptors ==== | |||
* if two files have the same hash, then hash table points to first file, which have "next hash" to another file descriptor with the same hash. If there is no collision then it's 0. | |||
* filename is 4 bytes aligned, terminated by 0x00 (and padded with 0x00 to 4 bytes) | |||
Latest revision as of 21:24, 23 October 2022
.wad file format is exactly the same as Worms .dir format, only extension is different.
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | Magic, 44 49 52 1A (DIR\x1A)
|
| 0x4 | 0x4 | File size |
| 0x8 | 0x4 | Directory address |
| 0xC | ??? | Files data |
- file data spans up to the "address of directory". These two points are optional, but they provide a nice alignment:
- There is
1A 00at the end of each file - There may be
00padding after that, so the next file/section starts at offset aligned to 4 bytes
- There is
Following offsets are counted from "Directory address"
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | Magic, 0A 00 00 00
|
| 0x4 | 0x1000 | Hash table, 1024 4-byte entries |
| 0x1004 | ??? | File descriptors |
Hash table
- each entry value + "address of directory" is a pointer to corresponding file descriptor
- each position is calculated, hash function is available at https://worms2d.info/Graphics_directory
each file descriptor have following structure:
| Offset | Size | Description |
|---|---|---|
| 0x0 | 0x4 | Next hash, by default is set to 00 00 00 00
|
| 0x4 | 0x4 | File data offset in archive |
| 0x8 | 0x4 | File size |
| 0xC | 0x4 | Filename with path |
File descriptors
- if two files have the same hash, then hash table points to first file, which have "next hash" to another file descriptor with the same hash. If there is no collision then it's 0.
- filename is 4 bytes aligned, terminated by 0x00 (and padded with 0x00 to 4 bytes)