c2logic

Compiles C code to Mindustry logic. Still in beta, so compiled output may not be fully optimized. Requirements are the pycparser package and the C preprocessor (cpp).

Installation

pip install git+https://github.com/SuperStormer/c2logic

Documentation

Run the command line tool using:

c2logic filename -O optimization_level

where filename is a string and optimization_level is an optional integer.

Optimization Level:

0. completely unoptimized.
1. the default
   • modify variables without using a temporary
2. more optimizations
   • remove uncalled functions
   • constant folding
3. turns on some potentially unsafe optimizations
   • augmented assignment and pre/postincrement/decrement don't modify __rax
   • returning from main becomes equivalent to end

Locals are rewritten as _<varname>_<func_name>. Globals are unchanged.

Special Variables:

• __rax: similar to x86 rax
• __rbx: stores left hand side of binary ops to avoid clobbering by the right side
• __retaddr__<func_name>: stores return address of func call

When writing your code, you must include c2logic/builtins.h, which is located in the python include directory (location depends on system, mine is at ~/.local/include/python3.8/). A quick way to find this is python3 -c "from c2logic.compiler import get_include_path; print(get_include_path())" (use python if you are using windows).

See include/builtins.h for API definitions and examples for API sample usage.

Supported Features

• all Mindustry instructions as of BE 20879 with single data returns (nothing that sets both outx and outy for example)
• all C control flow structures except switch
• functions
• local/global variables

Unsupported Features

• defining global variables outside of functions - define it in main
• recursive calls - use iteration
• structs - split it into multiple variables
• enums - use an int plus macros
• block scoped variables - just use locals
• typedefs - use macros
• pointers - don't use them
• switch - use if-else chains