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Merged
youknowone merged 5 commits into from
Nov 29, 2025
Merged

ctypes struct/union/array #6309

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4b52c56
PyCStructure
youknowone Nov 28, 2025
0a39899
impl union
youknowone Nov 29, 2025
2585c5e
array
youknowone Nov 29, 2025
efebed6
temp remove
youknowone Nov 29, 2025
711ea51
apply review
youknowone Nov 29, 2025
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temp remove
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@youknowone
youknowone committed Nov 29, 2025
commit efebed6810722d15dec0edef5189607a80436acd
1 change: 1 addition & 0 deletions crates/vm/src/stdlib/ctypes.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -65,6 +65,7 @@ pub(crate) mod _ctypes {
#[derive(Debug, PyPayload)]
pub struct CArgObject {
pub obj: PyObjectRef,
#[allow(dead_code)]
pub offset: isize,
}

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54 changes: 2 additions & 52 deletions crates/vm/src/stdlib/ctypes/structure.rs
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Expand Up @@ -174,6 +174,7 @@ impl AsNumber for PyCStructType {
}

/// Structure field info stored in instance
#[allow(dead_code)]
#[derive(Debug, Clone)]
pub struct FieldInfo {
pub name: String,
Expand All @@ -194,6 +195,7 @@ pub struct PyCStructure {
/// Raw memory buffer for the structure
pub(super) buffer: PyRwLock<Vec<u8>>,
/// Field information (name -> FieldInfo)
#[allow(dead_code)]
pub(super) fields: PyRwLock<HashMap<String, FieldInfo>>,
/// Total size of the structure
pub(super) size: AtomicCell<usize>,
Expand Down Expand Up @@ -300,58 +302,6 @@ impl Constructor for PyCStructure {
// Note: GetAttr and SetAttr are not implemented here.
// Field access is handled by CField descriptors registered on the class.

impl PyCStructure {
/// Convert bytes to a Python value
fn bytes_to_value(bytes: &[u8], _type_ref: &PyTypeRef, vm: &VirtualMachine) -> PyResult {
match bytes.len() {
1 => Ok(vm.ctx.new_int(bytes[0] as i8).into()),
2 => {
let val = i16::from_ne_bytes([bytes[0], bytes[1]]);
Ok(vm.ctx.new_int(val).into())
}
4 => {
let val = i32::from_ne_bytes([bytes[0], bytes[1], bytes[2], bytes[3]]);
Ok(vm.ctx.new_int(val).into())
}
8 => {
let val = i64::from_ne_bytes([
bytes[0], bytes[1], bytes[2], bytes[3], bytes[4], bytes[5], bytes[6], bytes[7],
]);
Ok(vm.ctx.new_int(val).into())
}
_ => Ok(vm.ctx.new_int(0).into()),
}
}

/// Convert a Python value to bytes
fn value_to_bytes(value: &PyObjectRef, size: usize, vm: &VirtualMachine) -> PyResult<Vec<u8>> {
if let Ok(int_val) = value.try_int(vm) {
let i = int_val.as_bigint();
match size {
1 => {
let val = i.to_i8().unwrap_or(0);
Ok(val.to_ne_bytes().to_vec())
}
2 => {
let val = i.to_i16().unwrap_or(0);
Ok(val.to_ne_bytes().to_vec())
}
4 => {
let val = i.to_i32().unwrap_or(0);
Ok(val.to_ne_bytes().to_vec())
}
8 => {
let val = i.to_i64().unwrap_or(0);
Ok(val.to_ne_bytes().to_vec())
}
_ => Ok(vec![0u8; size]),
}
} else {
Ok(vec![0u8; size])
}
}
}

#[pyclass(flags(BASETYPE, IMMUTABLETYPE), with(Constructor))]
impl PyCStructure {
#[pygetset]
Expand Down