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Merged
youknowone merged 4 commits into from
Mar 1, 2025
Merged

_ctypes addressof and Structure #5573

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2baeb3e
_ctypes.addressof
arihant2math Feb 28, 2025
66c40c6
ctypes.Structure implementation
arihant2math Feb 28, 2025
2c6e126
clippy fix
arihant2math Feb 28, 2025
19505b5
formatting
arihant2math Feb 28, 2025
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ctypes.Structure implementation 
Signed-off-by: Ashwin Naren <arihant2math@gmail.com>
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@arihant2math
arihant2math committed Feb 28, 2025
commit 66c40c6616e7157b0f6c972d24f3cd18e3a25ce4
54 changes: 53 additions & 1 deletion vm/src/stdlib/ctypes/structure.rs
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Original file line number Diff line number Diff line change
@@ -1,5 +1,57 @@
use std::collections::HashMap;
use crate::builtins::{PyList, PyStr, PyTuple, PyTypeRef};
use crate::function::FuncArgs;
use crate::{AsObject, Py, PyObjectRef, PyPayload, PyResult, VirtualMachine};
use rustpython_vm::types::Constructor;
use std::fmt::Debug;
use rustpython_common::lock::PyRwLock;
use crate::types::GetAttr;

#[pyclass(name = "Structure", module = "_ctypes")]
pub struct PyCStructure {}
#[derive(PyPayload, Debug)]
pub struct PyCStructure {
field_data: PyRwLock<HashMap<String, PyObjectRef>>,
data: PyRwLock<HashMap<String, PyObjectRef>>
}

impl Constructor for PyCStructure {
type Args = FuncArgs;

fn py_new(cls: PyTypeRef, _args: Self::Args, vm: &VirtualMachine) -> PyResult {
let fields_attr = cls.get_class_attr(vm.ctx.interned_str("_fields_").unwrap()).ok_or_else(|| {
vm.new_attribute_error("Structure must have a _fields_ attribute".to_string())
})?;
// downcast into list
let fields = fields_attr.downcast_ref::<PyList>().ok_or_else(|| {
vm.new_type_error("Structure _fields_ attribute must be a list".to_string())
})?;
let fields = fields.borrow_vec();
let mut field_data = HashMap::new();
for field in fields.iter() {
let field = field.downcast_ref::<PyTuple>().ok_or_else(|| {
vm.new_type_error("Field must be a tuple".to_string())
})?;
let name = field.get(0).unwrap().downcast_ref::<PyStr>().ok_or_else(|| {
vm.new_type_error("Field name must be a string".to_string())
})?;
let typ = field.get(1).unwrap().clone();
field_data.insert(name.as_str().to_string(), typ);
}
todo!("Implement PyCStructure::py_new")
}
}

impl GetAttr for PyCStructure {
fn getattro(zelf: &Py<Self>, name: &Py<PyStr>, vm: &VirtualMachine) -> PyResult {
let name = name.to_string();
let data = zelf.data.read();
match data.get(&name) {
Some(value) => Ok(value.clone()),
None => Err(vm.new_attribute_error(format!("No attribute named {}", name)))
}
}
}

#[pyclass(flags(BASETYPE, IMMUTABLETYPE))]
impl PyCStructure {}