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Copy pathabstract_.rs
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217 lines (191 loc) · 6.08 KB
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use crate::{PyObject, pystate::with_vm};
use alloc::slice;
use core::ffi::c_int;
pub use iter::*;
pub use mapping::*;
pub use number::*;
use rustpython_vm::builtins::{PyDict, PyStr, PyTuple};
use rustpython_vm::function::{FuncArgs, KwArgs, PosArgs};
use rustpython_vm::{AsObject, Py, PyObjectRef, PyResult, VirtualMachine};
pub use sequence::*;
mod iter;
mod mapping;
mod number;
mod sequence;
const PY_VECTORCALL_ARGUMENTS_OFFSET: usize = 1usize << (usize::BITS as usize - 1);
fn tuple_to_args(tuple: &Py<PyTuple>) -> PosArgs {
tuple.iter().cloned().collect::<Vec<_>>().into()
}
fn dict_to_kwargs(vm: &VirtualMachine, dict: &Py<PyDict>) -> PyResult<KwArgs> {
dict.items_vec()
.into_iter()
.map(|(key, value)| {
let key = key
.downcast_ref::<PyStr>()
.map(|s| s.to_string())
.ok_or_else(|| vm.new_type_error("keywords must be strings"))?;
Ok((key, value))
})
.collect::<PyResult<_>>()
.map(KwArgs::new)
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyObject_Call(
callable: *mut PyObject,
args: *mut PyObject,
kwargs: *mut PyObject,
) -> *mut PyObject {
with_vm(|vm| {
let callable = unsafe { &*callable };
let args = tuple_to_args(unsafe { &*args }.try_downcast_ref::<PyTuple>(vm)?);
let kwargs: Option<KwArgs> = unsafe { kwargs.as_ref() }
.map(|kwargs| dict_to_kwargs(vm, kwargs.try_downcast_ref::<PyDict>(vm)?))
.transpose()?;
callable.call_with_args(FuncArgs::new(args, kwargs.unwrap_or_default()), vm)
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyObject_CallNoArgs(callable: *mut PyObject) -> *mut PyObject {
with_vm(|vm| unsafe { &*callable }.call((), vm))
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyObject_Vectorcall(
callable: *mut PyObject,
args: *const *mut PyObject,
nargsf: usize,
kwnames: *mut PyObject,
) -> *mut PyObject {
with_vm(|vm| {
let num_positional_args = nargsf & !PY_VECTORCALL_ARGUMENTS_OFFSET;
let kwnames: Option<&[PyObjectRef]> = unsafe {
kwnames
.as_ref()
.map(|tuple| Ok(&***tuple.try_downcast_ref::<PyTuple>(vm)?))
.transpose()?
};
let args_len = num_positional_args + kwnames.map_or(0, <[PyObjectRef]>::len);
let args = if args_len == 0 {
Vec::new()
} else {
unsafe { slice::from_raw_parts(args, args_len) }
.iter()
.map(|arg| unsafe { &**arg }.to_owned())
.collect::<Vec<_>>()
};
let callable = unsafe { &*callable };
callable.vectorcall(args, num_positional_args, kwnames, vm)
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyObject_VectorcallMethod(
name: *mut PyObject,
args: *const *mut PyObject,
nargsf: usize,
kwnames: *mut PyObject,
) -> *mut PyObject {
with_vm(|vm| {
let args_len = nargsf & !PY_VECTORCALL_ARGUMENTS_OFFSET;
if args_len == 0 {
return Err(vm.new_system_error("PyObject_VectorcallMethod called with no receiver"));
}
let (receiver, args) = unsafe { slice::from_raw_parts(args, args_len) }
.split_first()
.expect("args_len > 0 should guarantee a receiver");
let method_name = unsafe { (&*name).try_downcast_ref::<PyStr>(vm)? };
let callable = unsafe { (&**receiver).get_attr(method_name, vm)? };
Ok(unsafe {
PyObject_Vectorcall(
callable.as_object().as_raw().cast_mut(),
args.as_ptr(),
nargsf - 1,
kwnames,
)
})
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyObject_GetItem(obj: *mut PyObject, key: *mut PyObject) -> *mut PyObject {
with_vm(|vm| {
let obj = unsafe { &*obj };
let key = unsafe { &*key };
obj.get_item(key, vm)
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyObject_SetItem(
obj: *mut PyObject,
key: *mut PyObject,
value: *mut PyObject,
) -> c_int {
with_vm(|vm| {
let obj = unsafe { &*obj };
let key = unsafe { &*key };
let value = unsafe { &*value }.to_owned();
obj.set_item(key, value, vm)
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyObject_DelItem(obj: *mut PyObject, key: *mut PyObject) -> c_int {
with_vm(|vm| {
let obj = unsafe { &*obj };
let key = unsafe { &*key };
obj.del_item(key, vm)
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyObject_IsSubclass(derived: *mut PyObject, cls: *mut PyObject) -> c_int {
with_vm(|vm| {
let derived = unsafe { &*derived };
let cls = unsafe { &*cls };
derived.is_subclass(cls, vm)
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyObject_IsInstance(inst: *mut PyObject, cls: *mut PyObject) -> c_int {
with_vm(|vm| {
let inst = unsafe { &*inst };
let cls = unsafe { &*cls };
inst.is_instance(cls, vm)
})
}
#[unsafe(no_mangle)]
pub unsafe extern "C" fn PyObject_Size(obj: *mut PyObject) -> isize {
with_vm(|vm| {
let obj = unsafe { &*obj };
obj.length(vm)
})
}
#[cfg(test)]
mod tests {
use pyo3::prelude::*;
use pyo3::types::{PyDict, PyString};
#[test]
fn call_method1() {
Python::attach(|py| {
let string = PyString::new(py, "Hello, World!");
assert!(
string
.call_method1("endswith", ("!",))
.unwrap()
.is_truthy()
.unwrap()
);
})
}
#[test]
fn object_set_get_del_item() {
Python::attach(|py| {
let obj = PyDict::new(py).into_any();
obj.set_item("key", "value").unwrap();
assert_eq!(
obj.get_item("key")
.unwrap()
.cast_into::<PyString>()
.unwrap(),
"value"
);
obj.del_item("key").unwrap();
assert!(obj.get_item("key").is_err());
})
}
}