1.4 KiB
interpreter
This project aims to provide a very minimal scripting language for embedded systems. Many other languages already exist, such as Lua, Tcl, or BASIC; however, most implementations require certain system calls like read() and write(), as they expect a filesystem. This interpreter wants to be as system-independent and portable as possible: parsing script from strings one at a time, having minimal built-in functions (so the user can define their own IO calls and such), and only requiring a few standard library functions.
To use this program with your own device, you'll need some malloc/free implementation, and a freestanding standard library. Newlib works well for this; however, functions like atoi() and snprintf() will probably need to be rewritten (if you don't have an _sbrk defined).
Interpreter features:
- Variable/function definition - in C and in script
- if/else and while loops
- a solve function to parse strings at runtime
Inconvenient features:
- no local variables
- whitespace sometimes ignored
Some TODO items:
- fix all memory leaks
- add better error messages
- arrays?
- for loops
This project can be made for the host system (make) or an ARM system (make arm).
This project is still in heavy development, so don't expect much. To include it in your own project, just link in libinterp.a (for ARM) and use the header files.