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use std::os::raw::c_int;
use crate::err::{PyErr, PyResult};
use crate::python::Python;
pub(super) fn err_if_invalid_value<T: PartialEq + Copy>(
py: Python,
invalid_value: T,
actual_value: T,
) -> PyResult<T> {
if actual_value == invalid_value && PyErr::occurred(py) {
Err(PyErr::fetch(py))
} else {
Ok(actual_value)
}
}
#[macro_export]
macro_rules! int_fits_larger_int (
($rust_type:ty, $larger_type:ty) => (
impl ToPyObject for $rust_type {
#[inline]
fn to_object(&self, py: Python) -> PyObject {
(*self as $larger_type).into_object(py)
}
}
impl IntoPyObject for $rust_type {
fn into_object(self, py: Python) -> PyObject {
(self as $larger_type).into_object(py)
}
}
impl<'source> FromPyObject<'source> for $rust_type {
fn extract(obj: &'source PyObjectRef) -> PyResult<Self> {
let val = $crate::objectprotocol::ObjectProtocol::extract::<$larger_type>(obj)?;
match cast::<$larger_type, $rust_type>(val) {
Some(v) => Ok(v),
None => Err(exceptions::OverflowError.into())
}
}
}
)
);
#[macro_export]
macro_rules! int_convert_bignum (
($rust_type: ty, $byte_size: expr, $is_little_endian: expr, $is_signed: expr) => (
impl ToPyObject for $rust_type {
#[inline]
fn to_object(&self, py: Python) -> PyObject {
self.into_object(py)
}
}
impl IntoPyObject for $rust_type {
fn into_object(self, py: Python) -> PyObject {
unsafe {
let bytes = ::std::mem::transmute::<_, [c_uchar; $byte_size]>(self);
let obj = ffi::_PyLong_FromByteArray(
bytes.as_ptr() as *const c_uchar,
$byte_size,
$is_little_endian,
$is_signed,
);
PyObject::from_owned_ptr_or_panic(py, obj)
}
}
}
impl<'source> FromPyObject<'source> for $rust_type {
fn extract(ob: &'source PyObjectRef) -> PyResult<$rust_type> {
unsafe {
let num = ffi::PyNumber_Index(ob.as_ptr());
if num.is_null() {
return Err(PyErr::fetch(ob.py()));
}
let buffer: [c_uchar; $byte_size] = [0; $byte_size];
let ok = ffi::_PyLong_AsByteArray(
ob.as_ptr() as *mut ffi::PyLongObject,
buffer.as_ptr() as *const c_uchar,
$byte_size,
$is_little_endian,
$is_signed,
);
if ok == -1 {
Err(PyErr::fetch(ob.py()))
} else {
Ok(::std::mem::transmute::<_, $rust_type>(buffer))
}
}
}
}
)
);
#[cfg(target_endian = "little")]
pub(super) const IS_LITTLE_ENDIAN: c_int = 1;
#[cfg(not(target_endian = "little"))]
pub(super) const IS_LITTLE_ENDIAN: c_int = 0;
#[cfg(test)]
mod test {
use crate::conversion::ToPyObject;
use crate::python::Python;
#[test]
fn test_u32_max() {
let gil = Python::acquire_gil();
let py = gil.python();
let v = std::u32::MAX;
let obj = v.to_object(py);
assert_eq!(v, obj.extract::<u32>(py).unwrap());
assert_eq!(v as u64, obj.extract::<u64>(py).unwrap());
assert!(obj.extract::<i32>(py).is_err());
}
#[test]
fn test_i64_max() {
let gil = Python::acquire_gil();
let py = gil.python();
let v = std::i64::MAX;
let obj = v.to_object(py);
assert_eq!(v, obj.extract::<i64>(py).unwrap());
assert_eq!(v as u64, obj.extract::<u64>(py).unwrap());
assert!(obj.extract::<u32>(py).is_err());
}
#[test]
fn test_i64_min() {
let gil = Python::acquire_gil();
let py = gil.python();
let v = std::i64::MIN;
let obj = v.to_object(py);
assert_eq!(v, obj.extract::<i64>(py).unwrap());
assert!(obj.extract::<i32>(py).is_err());
assert!(obj.extract::<u64>(py).is_err());
}
#[test]
fn test_u64_max() {
let gil = Python::acquire_gil();
let py = gil.python();
let v = std::u64::MAX;
let obj = v.to_object(py);
assert_eq!(v, obj.extract::<u64>(py).unwrap());
assert!(obj.extract::<i64>(py).is_err());
}
#[test]
#[cfg(not(Py_LIMITED_API))]
fn test_i128_max() {
let gil = Python::acquire_gil();
let py = gil.python();
let v = std::i128::MAX;
let obj = v.to_object(py);
assert_eq!(v, obj.extract::<i128>(py).unwrap());
assert_eq!(v as u128, obj.extract::<u128>(py).unwrap());
assert!(obj.extract::<u64>(py).is_err());
}
#[test]
#[cfg(not(Py_LIMITED_API))]
fn test_i128_min() {
let gil = Python::acquire_gil();
let py = gil.python();
let v = std::i128::MIN;
let obj = v.to_object(py);
assert_eq!(v, obj.extract::<i128>(py).unwrap());
assert!(obj.extract::<i64>(py).is_err());
assert!(obj.extract::<u128>(py).is_err());
}
#[test]
#[cfg(not(Py_LIMITED_API))]
fn test_u128_max() {
let gil = Python::acquire_gil();
let py = gil.python();
let v = std::u128::MAX;
let obj = v.to_object(py);
assert_eq!(v, obj.extract::<u128>(py).unwrap());
assert!(obj.extract::<i128>(py).is_err());
}
#[test]
#[cfg(not(Py_LIMITED_API))]
fn test_u128_overflow() {
use crate::ffi;
use crate::object::PyObject;
use crate::types::exceptions;
use std::os::raw::c_uchar;
let gil = Python::acquire_gil();
let py = gil.python();
let overflow_bytes: [c_uchar; 20] = [255; 20];
unsafe {
let obj = ffi::_PyLong_FromByteArray(
overflow_bytes.as_ptr() as *const c_uchar,
20,
super::IS_LITTLE_ENDIAN,
0,
);
let obj = PyObject::from_owned_ptr_or_panic(py, obj);
let err = obj.extract::<u128>(py).unwrap_err();
assert!(err.is_instance::<exceptions::OverflowError>(py));
}
}
}