4 releases
| new 0.2.2 | May 19, 2024 |
|---|---|
| 0.2.1 | May 19, 2024 |
| 0.2.0 | May 18, 2024 |
| 0.1.2 | May 11, 2024 |
#223 in Command line utilities
508 downloads per month
19KB
416 lines
Iroga
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
Usage
# Simple usage
iroga pack <DIR>
# For help information
iroga --help
IRO format
| 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
IRO Header
| 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 |
File indexing section
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 |
Data section
Concatenation of bytes of each file
Dependencies
~2–11MB
~100K SLoC