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Big Archive
Stephan Vedder edited this page Aug 18, 2017
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Big files are an archive format, that was used in many game titles created by EA Studios
The header has a fixed size of 16 bytes, following the table below:
| Offset | Bytes | Type | Name |
|---|---|---|---|
| 0 | 4 | CHAR[] | FOURCC |
| 4 | 4 | UINT | SIZE |
| 8 | 4 | UINT | NUM_ENTRIES |
| 12 | 4 | UINT | OFFSET_FIRST |
- FOURCC: Identifies the string as valid big archive. The string may either be "BIG4" or "BIGF", depending on the version.
- SIZE: The entire size of an big archive. Size of a single archive can not be greater than 2^32 bytes
- NUM_ENTRIES: Number of files that were packed into this archive
- OFFSET_FIRST: The offset inside the file to the first entry
After the header the follows a list with NUM_ENTRIES elements, each entry looks the following:
| Offset | Bytes | Type | Name |
|---|---|---|---|
| 0 | 4 | UINT | ENTRY_OFFSET |
| 4 | 4 | UINT | ENTRY_SIZE |
| 8 | N | CSTRING | ENTRY_NAME |
- ENTRY_OFFSET: specified the start of this entry inside the file (in bytes)
- ENTRY_SIZE: the size of the specified entry
- ENTRY_NAME: the name of this entry, read as a nullterminated string