# chexed

A simple terminal-based hex editor. It is written in C and uses the ncurses library.

## Prerequisites

You need a Linux system and the ncurses library.

Install it on Debian/Ubuntu with this command:
```bash
sudo apt install libncurses-dev
```

## Compilation

Use `gcc` to compile the source code. Run this command:

```bash
gcc chexed.c -o chexed -lncurses
```

## Usage

Run the program with a file path:

```bash
./chexed your_file.bin
```

### Controls

* **Arrow Keys**: navigate through the file.
* **Page Up / Page Down**: scroll quickly.
* **0-9, A-F**: input hex values.
* **+ / -**: increment or decrement the byte value by 1.
* **Ctrl+S**: save changes to the file.
* **Ctrl+Q**: quit the program.

## Known Limitations

The program loads the entire file into RAM. Do not open files larger than your available memory.

The file size is fixed: you cannot insert or delete bytes.

Editing works in a specific way: typing a new digit shifts the current value 4 bits to the left.

## License

MIT