79d9741906
NB: the behavior on out-of-range indices hasn't changed; it was merely wrongly documented before. See #1667
61 lines
1.8 KiB
Rust
61 lines
1.8 KiB
Rust
use crate::ffi::{Py_ssize_t, PY_SSIZE_T_MAX};
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use std::ffi::{CStr, CString};
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use std::marker::PhantomData;
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use std::rc::Rc;
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/// A marker type that makes the type !Send.
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/// Temporal hack until https://github.com/rust-lang/rust/issues/13231 is resolved.
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pub(crate) type Unsendable = PhantomData<Rc<()>>;
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pub struct PrivateMarker;
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macro_rules! private_decl {
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() => {
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/// This trait is private to implement; this method exists to make it
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/// impossible to implement outside the crate.
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fn __private__(&self) -> crate::internal_tricks::PrivateMarker;
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};
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}
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macro_rules! private_impl {
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() => {
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#[doc(hidden)]
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fn __private__(&self) -> crate::internal_tricks::PrivateMarker {
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crate::internal_tricks::PrivateMarker
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}
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};
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}
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macro_rules! pyo3_exception {
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($doc: expr, $name: ident, $base: ty) => {
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#[doc = $doc]
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#[repr(transparent)]
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#[allow(non_camel_case_types)]
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pub struct $name($crate::PyAny);
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$crate::impl_exception_boilerplate!($name);
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$crate::create_exception_type_object!(pyo3_runtime, $name, $base);
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};
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}
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#[derive(Debug)]
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pub(crate) struct NulByteInString(pub(crate) &'static str);
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pub(crate) fn extract_cstr_or_leak_cstring(
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src: &'static str,
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err_msg: &'static str,
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) -> Result<&'static CStr, NulByteInString> {
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CStr::from_bytes_with_nul(src.as_bytes())
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.or_else(|_| {
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CString::new(src.as_bytes()).map(|c_string| &*Box::leak(c_string.into_boxed_c_str()))
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})
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.map_err(|_| NulByteInString(err_msg))
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}
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/// Convert an usize index into a Py_ssize_t index, clamping overflow to
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/// PY_SSIZE_T_MAX.
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pub(crate) fn get_ssize_index(index: usize) -> Py_ssize_t {
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index.min(PY_SSIZE_T_MAX as usize) as Py_ssize_t
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}
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