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GeezerVison is showing github.com — Add mapping c-api functions by bschoenmaeckers · Pull Request #8003 · RustPython/RustPython

Add mapping c-api functions #8003

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Merged
youknowone merged 1 commit into RustPython:main from bschoenmaeckers:c-api-mapping
Jun 2, 2026

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Merged

Add mapping c-api functions #8003

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Add mapping c-api functions
bschoenmaeckers Jun 1, 2026
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3 changes: 3 additions & 0 deletions 3 crates/capi/src/abstract_.rs
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Original file line number Diff line number Diff line change
@@ -1,10 +1,13 @@
use crate::{PyObject, pystate::with_vm};
use alloc::slice;
use core::ffi::c_int;
pub use mapping::*;
use rustpython_vm::builtins::{PyDict, PyStr, PyTuple};
use rustpython_vm::function::{FuncArgs, KwArgs, PosArgs};
use rustpython_vm::{AsObject, Py, PyObjectRef, PyResult, VirtualMachine};

mod mapping;

const PY_VECTORCALL_ARGUMENTS_OFFSET: usize = 1usize << (usize::BITS as usize - 1);

fn tuple_to_args(tuple: &Py<PyTuple>) -> PosArgs {
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66 changes: 66 additions & 0 deletions 66 crates/capi/src/abstract_/mapping.rs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,66 @@
use crate::{PyObject, pystate::with_vm};
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyMapping_Size(obj: *mut PyObject) -> isize {
with_vm(|vm| {
let obj = unsafe { &*obj };
obj.try_mapping(vm)?.length(vm)
})
}

#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyMapping_Keys(obj: *mut PyObject) -> *mut PyObject {
with_vm(|vm| {
let obj = unsafe { &*obj };
let keys = obj.try_mapping(vm)?.keys(vm)?;
let iter = keys.get_iter(vm)?;
Ok(vm.ctx.new_list(iter.try_to_value(vm)?))
})
}

#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyMapping_Values(obj: *mut PyObject) -> *mut PyObject {
with_vm(|vm| {
let obj = unsafe { &*obj };
let values = obj.try_mapping(vm)?.values(vm)?;
let iter = values.get_iter(vm)?;
Ok(vm.ctx.new_list(iter.try_to_value(vm)?))
})
}

#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyMapping_Items(obj: *mut PyObject) -> *mut PyObject {
with_vm(|vm| {
let obj = unsafe { &*obj };
let items = obj.try_mapping(vm)?.items(vm)?;
let iter = items.get_iter(vm)?;
Ok(vm.ctx.new_list(iter.try_to_value(vm)?))
})
}

#[cfg(false)]
mod tests {
use pyo3::prelude::*;
use pyo3::types::{PyDict, PyMapping, PyMappingMethods, PyTuple};

#[test]
fn size_keys_values_items() {
Python::attach(|py| {
let dict = PyDict::new(py);
dict.set_item("a", 1).unwrap();
dict.set_item("b", 2).unwrap();
let mapping = dict.cast_into::<PyMapping>().unwrap();

assert_eq!(mapping.len().unwrap(), 2);

let keys = mapping.keys().unwrap();
assert_eq!(keys.len(), 2);

let values = mapping.values().unwrap();
assert_eq!(values.len(), 2);

let items = mapping.items().unwrap();
assert_eq!(items.len(), 2);
assert!(items.iter().all(|item| item.cast_into::<PyTuple>().is_ok()));
})
}
}
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