PARTCL - A TINY COMMAND LANGUAGE

From the post:

Inspired by these projects, I decided to build my own Tcl interpreter over the weekend. My goals were:

• Extreme minimalism. It should fit on an MCU with 16K of NAND.
• It should be easy to extend by writing your own commands in C.
• All parts should be isolated and should be easy to replace/customize.
• Default implementation should prefer size over performance.
• Lexer should tell when the end of the command is met so that we could read user input byte by byte and execute command only when it’s fully read.
• All parts of the interpreter should be covered with tests.