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162 lines (143 loc) · 4.75 KB
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use crate::PyObject;
use crate::object::define_py_check;
use crate::pystate::with_vm;
use core::ffi::c_int;
use itertools::process_results;
use rustpython_vm::AsObject;
use rustpython_vm::PyPayload;
use rustpython_vm::TryFromObject;
use rustpython_vm::builtins::{PyFrozenSet, PySet};
use rustpython_vm::function::ArgIterable;
define_py_check!(fn PySet_Check, types.set_type);
define_py_check!(fn PyFrozenSet_Check, types.frozenset_type);
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PySet_New(iterable: *mut PyObject) -> *mut PyObject {
with_vm(|vm| {
if iterable.is_null() {
return Ok(PySet::default().into_ref(&vm.ctx));
}
let iterable = ArgIterable::try_from_object(vm, unsafe { &*iterable }.to_owned())?;
let set = PySet::default().into_ref(&vm.ctx);
for item in iterable.iter(vm)? {
set.add(item?, vm)?;
}
Ok(set)
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyFrozenSet_New(iterable: *mut PyObject) -> *mut PyObject {
with_vm(|vm| {
if iterable.is_null() {
return Ok(vm.ctx.empty_frozenset.to_owned());
}
let iterable = ArgIterable::try_from_object(vm, unsafe { &*iterable }.to_owned())?;
let set = process_results(iterable.iter(vm)?, |it| PyFrozenSet::from_iter(vm, it))??;
Ok(set.into_ref(&vm.ctx))
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PySet_Add(set: *mut PyObject, key: *mut PyObject) -> c_int {
with_vm(|vm| {
let set = unsafe { &*set }.try_downcast_ref::<PySet>(vm)?;
let key = unsafe { &*key }.to_owned();
set.add(key, vm)
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PySet_Clear(set: *mut PyObject) -> c_int {
with_vm(|vm| {
let set = unsafe { &*set }.try_downcast_ref::<PySet>(vm)?;
set.clear();
Ok(())
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PySet_Contains(anyset: *mut PyObject, key: *mut PyObject) -> c_int {
with_vm(|vm| {
let anyset = unsafe { &*anyset };
let key = unsafe { &*key };
if let Some(set) = anyset.downcast_ref::<PySet>() {
set.__contains__(key, vm)
} else if let Some(frozenset) = anyset.downcast_ref::<PyFrozenSet>() {
frozenset.__contains__(key, vm)
} else {
Err(vm.new_type_error(format!(
"expected set or frozenset, got '{}'",
anyset.class().name()
)))
}
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PySet_Discard(set: *mut PyObject, key: *mut PyObject) -> c_int {
with_vm(|vm| {
let set = unsafe { &*set }.try_downcast_ref::<PySet>(vm)?;
let key = unsafe { &*key };
let had_item = set.__contains__(key, vm)?;
if had_item {
set.discard(key.to_owned(), vm)?;
}
Ok(had_item)
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PySet_Pop(set: *mut PyObject) -> *mut PyObject {
with_vm(|vm| {
let set = unsafe { &*set }.try_downcast_ref::<PySet>(vm)?;
set.pop(vm)
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PySet_Size(anyset: *mut PyObject) -> isize {
with_vm(|vm| {
let anyset = unsafe { &*anyset };
if let Some(set) = anyset.downcast_ref::<PySet>() {
set.as_object().length(vm)
} else if let Some(frozenset) = anyset.downcast_ref::<PyFrozenSet>() {
frozenset.as_object().length(vm)
} else {
Err(vm.new_type_error(format!(
"expected set or frozenset, got '{}'",
anyset.class().name()
)))
}
})
}
#[cfg(false)]
mod tests {
use pyo3::prelude::*;
use pyo3::types::{PyFrozenSet, PyInt, PySet};
#[test]
fn new_and_size() {
Python::attach(|py| {
let set = PySet::empty(py).unwrap();
assert!(set.is_instance_of::<PySet>());
assert_eq!(set.len(), 0);
let frozen = PyFrozenSet::empty(py).unwrap();
assert!(frozen.is_instance_of::<PyFrozenSet>());
assert_eq!(frozen.len(), 0);
})
}
#[test]
fn add_contains_discard() {
Python::attach(|py| {
let set = PySet::empty(py).unwrap();
let item = PyInt::new(py, 42);
set.add(&item).unwrap();
assert!(set.contains(&item).unwrap());
set.discard(&item).unwrap();
assert!(!set.contains(&item).unwrap());
})
}
#[test]
fn pop_reduces_size() {
Python::attach(|py| {
let set = PySet::empty(py).unwrap();
set.add(7).unwrap();
assert_eq!(set.len(), 1);
let popped = set.pop().unwrap();
assert_eq!(popped.extract::<i32>().unwrap(), 7);
assert_eq!(set.len(), 0);
})
}
}