devel/c2ffi 21.1.0.20260104 OpenBSD

This is a tool for extracting definitions from C, C++, and Objective C headers for use with foreign function call interfaces.

There are generally two steps to using `c2ffi`:

• Generate output for a particular header or file, gathering macro definitions (with the `-M <file>.c` parameter)

• Generate output for macro definitions by running `c2ffi` again on the *generated* file (without `-M`)

Currently JSON is the default output. This is in a rather wordy hierarchical format, with each object having a "tag" field which describes it. All objects are contained in an array. This should make it fairly easy (or at least far easier than parsing C yourself) to transform into language-specific bindings.

The following language bindings exist for `c2ffi`:

• [cl-autowrap](https://github.com/rpav/cl-autowrap/): Create bindings in Common Lisp from a `.h` with `c2ffi` using a simple `(c-include "file.h")`

• [c2ffi-ruby](https://github.com/rpav/c2ffi-ruby): Uses the JSON from c2ffi to produce a nicely-formatted Ruby file for ruby-ffi.