c500
This is a single-pass C→WebAssembly compiler in 500 lines of (nicely formatted, non-comment, non-docstring) Python:
$ sloccount compiler.py | grep python:
python: 500 (100.00%)It currently supports:
- Arithmetic
- Pointers
int,char, and string constants (no floating point)if,while,do while,for- Functions
- Typedefs
- (Single dimensional) arrays
- Some other stuff
Notably, it does not support preprocessor directives or structs.
Running code
You can use the ./run-test script to compile and run C code. Simply run ./run-test <c file> after running mkdir scratch.
You'll need bat, wabt, and wasmer installed.
Running tests
You will need to clone the c-testsuite into the repo: https://github.com/c-testsuite/c-testsuite
You'll also need all the tools listed in the Running Code section above.
Then you can ./run-all. It currently passes 34/220 test cases.