gsc-tool/README.md

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# GSC Tool
A utility to compile & decompile IW engine game scripts.

## Supported Games
- **IW5** *(Call of Duty: Modern Warfare 3)* `PC` `PS3` `Xbox 360`
- **IW6** *(Call of Duty: Ghosts)* `PC` `PS3` `PS4` `Xbox 360` `Xbox One`
- **IW7** *(Call of Duty: Infinite Warfare)* `PC` `PS4` `Xbox One`
- **IW8** *(Call of Duty: Modern Warfare (2019) / Warzone)* `PC` `PS4` `PS5` `Xbox One` `Xbox Series X|S`
- **IW9** *(Call of Duty: Modern Warfare II (2022) / Warzone 2.0)* `PC` `PS4` `PS5` `Xbox One` `Xbox Series X|S`
- **S1** *(Call of Duty: Advanced Warfare)* `PC` `PS3` `PS4` `Xbox 360` `Xbox One`
- **S2** *(Call of Duty: WWII)* `PC` `PS4` `Xbox One`
- **S4** *(Call of Duty: Vanguard)* `PC` `PS4` `PS5` `Xbox One` `Xbox Series X|S`
- **H1** *(Call of Duty: Modern Warfare Remastered)* `PC` `PS4` `Xbox One`
- **H2** *(Call of Duty: Modern Warfare 2 Campaign Remastered)* `PC` `PS4` `PS5` `Xbox One` `Xbox Series X|S`
- **T6** *(Call of Duty: Black Ops II)* `PC`
- **T7** *(Call of Duty: Black Ops III)* ***\*WIP\****
- **T8** *(Call of Duty: Black Ops 4)* ***\*WIP\****
- **T9** *(Call of Duty: Black Ops Cold War)* ***\*WIP\****

## Usage
``./gsc-tool.exe <mode> <game> <path>``

**modes**: `asm`, `disasm`, `comp`, `decomp`
- *note:* zonetool files (*.cgsc*, *.cgsc.stack*) use: `zasm`, `zdisasm`, `zcomp`, `zdecomp` modes

**games**: `iw5`, `iw6`, `iw7`, `iw8`, `s1`, `s2`, `s4`, `h1`, `h2`, `t6`
- *note:* PS3 & Xbox 360 use `iw5c`, `iw6c`, `s1c` games

**paths**: `file`, `directory` (recursive process all files inside the directory)

Example: ``./gsc-tool.exe comp iw5 ./data/iw5/my_fancy_script.gsc``

| Mode     |Description                | Output      |
|:---------|:--------------------------|:------------|
|`asm`     |assemble a `file.gscasm`   |`file.gscbin`|
|`disasm`  |dissasemble a `file.gscbin`|`file.gscasm`|
|`comp`    |compile a `file.gsc`       |`file.gscbin`|
|`decomp`  |decompile a `file.gscbin`  |`file.gsc`   |

## File Format
If you need to extract scripts from fastfiles or game memory, use [Zonetool](https://github.com/ZoneTool/zonetool) or [Jekyll](https://github.com/EthanC/Jekyll).

- gsc-tool `.gscbin` format is a serialized ScriptFile struct: <br/>
***name***: null-terminated string <br/>
***compressedLen***: 4 byte uint <br/>
***len***: 4 byte uint <br/>
***bytecodeLen***: 4 byte uint <br/>
***buffer***: byte array[compressedLen] <br/>
***bytecode***: byte array[bytecodeLen] <br/>

note: for PS3 & Xbox 360 `.gscbin` files *(compressedLen, len, bytecodeLen)* are saved as little-endian!!

- zonetool (IW5) format made of bytecode file `.cgsc` and decompressed stack buffer `.cgsc.stack`.

- treyarch (T6) format is a single buffer with gscobj data `.gsc` or `.csc`.

## Contribute
If you like my work, feel free to contribute! Would allow me to spend more time adding new features & fixing bugs.

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## Credits
This project is based on [*RektInator's* gsc-asm](https://github.com/ZoneTool/gsc-asm). Special thanks to **RektInator**, **JTAG** & **Dasfonia**.

## Disclaimer
This software has been created purely for the purposes of academic research. Project maintainers are not responsible or liable for misuse of the software. Use responsibly.