Command line application to pack a single directory into an IRO archive. The IRO archive is a format used in 7th heaven, a FF7 mod manager application
# Simple usage
iroga pack <DIR>
# For help information
iroga --help| Offset | Size | Description |
|---|---|---|
| 0x00 | 20 | IRO Header |
| 0x20 | (20 + L) * N | File indexing section |
| 0x20 + (20 + L) * N | B * N | Data section |
N is the number of files, L is the dynamic length of file paths, B is the dynamic byte length of the files
| Offset | Size | Description |
|---|---|---|
| 0x00 | 4 | IROS constant text in ASCII |
| 0x04 | 4 | Version (latest version: 0x10002) |
| 0x08 | 4 | Flags (0: full IRO, 1: patch) |
| 0x0C | 4 | Size of IRO header (always 16) |
| 0x10 | 4 | Number of files inside the archive |
Section repeated for each file inside the archive
| Offset | Size | Description |
|---|---|---|
| 0x00 | 2 | Length of this section (filepath_length + 20) |
| 0x02 | 2 | Length of the file path |
| 0x04 | L | File path in unicode UTF16 |
| 0x04 + L | 4 | File flags (0: Non-compressed, other unimplemented) |
| 0x04 + L + 0x04 | 8 | IRO archive offset pointing to the related file in data section |
| 0x04 + L + 0x0C | 4 | Length of the data |
Concatenation of bytes of each file