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use crate::conversion::{IntoPyObject, ToPyObject};
use crate::err::PyErr;
use crate::ffi;
use crate::instance::{Py, PyObjectWithToken};
use crate::object::PyObject;
use crate::objectprotocol::ObjectProtocol;
use crate::python::{Python, ToPyPointer};
use crate::types::PyObjectRef;
use crate::FromPyObject;
use crate::PyResult;
use std::os::raw::c_double;
#[repr(transparent)]
pub struct PyFloat(PyObject);
pyobject_native_type!(PyFloat, ffi::PyFloat_Type, ffi::PyFloat_Check);
impl PyFloat {
pub fn new(_py: Python, val: c_double) -> Py<PyFloat> {
unsafe { Py::from_owned_ptr_or_panic(ffi::PyFloat_FromDouble(val)) }
}
pub fn value(&self) -> c_double {
unsafe { ffi::PyFloat_AsDouble(self.0.as_ptr()) }
}
}
impl ToPyObject for f64 {
fn to_object(&self, py: Python) -> PyObject {
PyFloat::new(py, *self).into()
}
}
impl IntoPyObject for f64 {
fn into_object(self, py: Python) -> PyObject {
PyFloat::new(py, self).into()
}
}
impl<'source> FromPyObject<'source> for f64 {
#![cfg_attr(feature = "cargo-clippy", allow(float_cmp))]
fn extract(obj: &'source PyObjectRef) -> PyResult<Self> {
let v = unsafe { ffi::PyFloat_AsDouble(obj.as_ptr()) };
if v == -1.0 && PyErr::occurred(obj.py()) {
Err(PyErr::fetch(obj.py()))
} else {
Ok(v)
}
}
}
impl ToPyObject for f32 {
fn to_object(&self, py: Python) -> PyObject {
PyFloat::new(py, f64::from(*self)).into()
}
}
impl IntoPyObject for f32 {
fn into_object(self, py: Python) -> PyObject {
PyFloat::new(py, f64::from(self)).into()
}
}
impl<'source> FromPyObject<'source> for f32 {
fn extract(obj: &'source PyObjectRef) -> PyResult<Self> {
Ok(obj.extract::<f64>()? as f32)
}
}
#[cfg(test)]
mod test {
use crate::conversion::ToPyObject;
use crate::python::Python;
macro_rules! num_to_py_object_and_back (
($func_name:ident, $t1:ty, $t2:ty) => (
#[test]
fn $func_name() {
let gil = Python::acquire_gil();
let py = gil.python();
let val = 123 as $t1;
let obj = val.to_object(py);
assert_eq!(obj.extract::<$t2>(py).unwrap(), val as $t2);
}
)
);
num_to_py_object_and_back!(to_from_f64, f64, f64);
num_to_py_object_and_back!(to_from_f32, f32, f32);
num_to_py_object_and_back!(int_to_float, i32, f64);
}