Initial commit.

This commit is contained in:
2025-09-08 14:17:51 +02:00
commit 14dfb3e692
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/target
*.so

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[package]
name = "pyrtest"
version = "0.1.0"
edition = "2024"
[lib]
crate-type = ["dylib"]
name = 'pyrtest'
[dependencies]
[build-dependencies]
bindgen = "0.72.1"
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# Python lib from scratch
```
cargo build
cp target/debug/*.so .
python -c 'import libpyrtest; print(libpyrtest.shit("fuck"))'
```

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use std::env;
use std::path::PathBuf;
fn main() {
// Trying to find python3
let lib = pkg_config::probe_library("python3").expect("Python3 is not available for linking");
// The bindgen::Builder is the main entry point
// to bindgen, and lets you build up options for
// the resulting bindings.
let mut bindings_builder = bindgen::Builder::default()
// The input header we would like to generate
// bindings for.
.header("csrc/wrapper.h")
// Tell cargo to invalidate the built crate whenever any of the
// included header files changed.
.parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
.blocklist_var("FP_INT_UPWARD")
.blocklist_var("FP_NORMAL")
.blocklist_var("FP_SUBNORMAL")
.blocklist_var("FP_INFINITE")
.blocklist_var("FP_INT_TONEAREST")
.blocklist_var("FP_INT_TONEARESTFROMZERO")
.blocklist_var("FP_INT_TOWARDZERO")
.blocklist_var("FP_NAN")
.blocklist_var("FP_ZERO")
.blocklist_var("FP_INT_DOWNWARD");
// Finish the builder and generate the bindings.
for path in lib.include_paths {
let Some(lib_path) = path.as_path().to_str() else {
continue;
};
bindings_builder = bindings_builder.clang_arg(format!("-I{}", lib_path));
}
let bindings = bindings_builder
.generate()
// Unwrap the Result and panic on failure.
.expect("Unable to generate bindings");
// Write the bindings to the $OUT_DIR/bindings.rs file.
let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
bindings
.write_to_file(out_path.join("bindings.rs"))
.expect("Couldn't write bindings!");
}

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#include <Python.h>

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src/lib.rs Normal file
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#![allow(non_upper_case_globals)]
#![allow(non_camel_case_types)]
#![allow(non_snake_case)]
#![allow(dead_code)]
#![allow(unused_imports)]
#![allow(improper_ctypes)]
use std::ffi::CStr;
include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
pub const PyObject_HEAD_INIT: PyObject = PyObject {
__bindgen_anon_1: _object__bindgen_ty_1 { ob_refcnt: 1 },
ob_type: std::ptr::null_mut(),
};
pub const PyModuleDef_HEAD_INIT: PyModuleDef_Base = PyModuleDef_Base {
ob_base: PyObject_HEAD_INIT,
m_init: None,
m_index: 0,
m_copy: std::ptr::null_mut(),
};
pub fn safe_shit_func(data: &str) -> usize {
return data.len();
}
unsafe extern "C" fn py_shit_func(_mod_self: *mut PyObject, args: *mut PyObject) -> *mut PyObject {
let mut ptr = std::ptr::null();
let parsed = unsafe { PyArg_ParseTuple(args, c"s".as_ptr(), &mut ptr) };
if parsed == 0 {
return std::ptr::null::<PyObject>() as *mut _;
}
let Ok(read_arg) = unsafe { CStr::from_ptr(ptr) }.to_str() else {
unsafe { PyErr_SetString(PyExc_RuntimeError, c"Not an UTF-8 string".as_ptr()) };
return std::ptr::null::<PyObject>() as *mut _;
};
let ret = safe_shit_func(read_arg);
return unsafe { PyLong_FromSize_t(ret) };
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyInit_libpyrtest() -> *mut PyObject {
let slots = vec![
PyModuleDef_Slot {
slot: Py_mod_multiple_interpreters as i32,
value: 2 as *mut std::ffi::c_void,
},
PyModuleDef_Slot {
slot: 0,
value: std::ptr::null_mut(),
},
]
.into_boxed_slice();
let slots_ptr: *mut PyModuleDef_Slot = Box::into_raw(slots) as *mut _;
let methods: Box<[PyMethodDef]> = vec![
PyMethodDef {
ml_name: c"shit".as_ptr(),
ml_meth: Some(py_shit_func),
ml_flags: METH_VARARGS as i32,
ml_doc: c"Shit function for you all fools".as_ptr(),
},
PyMethodDef {
ml_name: std::ptr::null(),
ml_meth: None,
ml_flags: 0,
ml_doc: std::ptr::null(),
},
]
.into_boxed_slice();
let methods_ptr: *mut _ = Box::into_raw(methods) as *mut _;
let my_mod = PyModuleDef {
m_base: PyModuleDef_HEAD_INIT,
m_name: c"libpyrstest".as_ptr(),
m_doc: c"My cool rust module".as_ptr(),
m_size: 0,
m_methods: methods_ptr,
m_slots: slots_ptr,
m_traverse: None,
m_clear: None,
m_free: None,
};
let raw_mod = Box::into_raw(Box::new(my_mod));
return unsafe { PyModuleDef_Init(raw_mod) };
}