From 009080dba7d22fe81f12fc547f3ea4e47a841b91 Mon Sep 17 00:00:00 2001
From: Bas Schoenmaeckers <7943856+bschoenmaeckers@users.noreply.github.com>
Date: Wed, 3 Jun 2026 15:52:17 +0200
Subject: [PATCH] Add basic module functions to c-api (#8032)

---
 crates/capi/src/lib.rs          |  1 +
 crates/capi/src/moduleobject.rs | 42 +++++++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 crates/capi/src/moduleobject.rs

diff --git a/crates/capi/src/lib.rs b/crates/capi/src/lib.rs
index c1ba7f559..fdb21cb65 100644
--- a/crates/capi/src/lib.rs
+++ b/crates/capi/src/lib.rs
@@ -20,6 +20,7 @@ pub mod import;
 pub mod listobject;
 pub mod longobject;
 pub mod methodobject;
+pub mod moduleobject;
 pub mod object;
 pub mod pycapsule;
 pub mod pyerrors;
diff --git a/crates/capi/src/moduleobject.rs b/crates/capi/src/moduleobject.rs
new file mode 100644
index 000000000..dd7534554
--- /dev/null
+++ b/crates/capi/src/moduleobject.rs
@@ -0,0 +1,42 @@
+use crate::PyObject;
+use crate::object::define_py_check;
+use crate::pystate::with_vm;
+use rustpython_vm::builtins::{PyModule, PyStr};
+
+define_py_check!(fn PyModule_Check, types.module_type);
+define_py_check!(exact fn PyModule_CheckExact, types.module_type);
+
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn PyModule_GetNameObject(module: *mut PyObject) -> *mut PyObject {
+    with_vm(|vm| {
+        let module = unsafe { &*module }.try_downcast_ref::<PyModule>(vm)?;
+        let dict = module.dict();
+        let name = dict
+            .get_item_opt(rustpython_vm::identifier!(vm, __name__), vm)?
+            .and_then(|obj| obj.downcast_ref::<PyStr>().map(ToOwned::to_owned));
+        name.ok_or_else(|| vm.new_system_error("nameless module"))
+    })
+}
+
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn PyModule_GetFilenameObject(module: *mut PyObject) -> *mut PyObject {
+    with_vm(|vm| {
+        let module = unsafe { &*module }.try_downcast_ref::<PyModule>(vm)?;
+        let dict = module.dict();
+        let filename = dict
+            .get_item_opt(rustpython_vm::identifier!(vm, __file__), vm)?
+            .and_then(|obj| obj.downcast_ref::<PyStr>().map(ToOwned::to_owned));
+        filename.ok_or_else(|| vm.new_system_error("module filename missing"))
+    })
+}
+
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn PyModule_NewObject(name: *mut PyObject) -> *mut PyObject {
+    with_vm(|vm| -> rustpython_vm::PyResult<_> {
+        let name = unsafe { &*name }.try_downcast_ref::<PyStr>(vm)?;
+        let name = name
+            .to_str()
+            .ok_or_else(|| vm.new_system_error("module name must be valid UTF-8"))?;
+        Ok(vm.new_module(name, vm.ctx.new_dict(), None))
+    })
+}