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120 lines
4.2 KiB
120 lines
4.2 KiB
#if !defined(TORCH_STABLE_ONLY) && !defined(TORCH_TARGET_VERSION)
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// Copyright (c) 2021 The Pybind Development Team.
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// All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#pragma once
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#include <pybind11/cast.h>
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#include <pybind11/detail/common.h>
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#include <pybind11/detail/descr.h>
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#include <pybind11/pybind11.h>
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#include <pybind11/pytypes.h>
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#include <string>
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#if defined(PYBIND11_HAS_FILESYSTEM)
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# include <filesystem>
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#elif defined(PYBIND11_HAS_EXPERIMENTAL_FILESYSTEM)
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# include <experimental/filesystem>
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#else
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# error "Neither #include <filesystem> nor #include <experimental/filesystem is available."
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#endif
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PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
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PYBIND11_NAMESPACE_BEGIN(detail)
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#ifdef PYPY_VERSION
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# define PYBIND11_REINTERPRET_CAST_VOID_PTR_IF_NOT_PYPY(...) (__VA_ARGS__)
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#else
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# define PYBIND11_REINTERPRET_CAST_VOID_PTR_IF_NOT_PYPY(...) \
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(reinterpret_cast<void *>(__VA_ARGS__))
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#endif
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#if defined(PYBIND11_HAS_FILESYSTEM) || defined(PYBIND11_HAS_EXPERIMENTAL_FILESYSTEM)
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template <typename T>
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struct path_caster {
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private:
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static PyObject *unicode_from_fs_native(const std::string &w) {
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# if !defined(PYPY_VERSION)
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return PyUnicode_DecodeFSDefaultAndSize(w.c_str(), ssize_t(w.size()));
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# else
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// PyPy mistakenly declares the first parameter as non-const.
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return PyUnicode_DecodeFSDefaultAndSize(const_cast<char *>(w.c_str()), ssize_t(w.size()));
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# endif
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}
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static PyObject *unicode_from_fs_native(const std::wstring &w) {
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return PyUnicode_FromWideChar(w.c_str(), ssize_t(w.size()));
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}
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public:
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static handle cast(const T &path, return_value_policy, handle) {
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if (auto py_str = unicode_from_fs_native(path.native())) {
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return module_::import("pathlib")
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.attr("Path")(reinterpret_steal<object>(py_str))
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.release();
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}
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return nullptr;
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}
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bool load(handle handle, bool) {
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// PyUnicode_FSConverter and PyUnicode_FSDecoder normally take care of
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// calling PyOS_FSPath themselves, but that's broken on PyPy (PyPy
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// issue #3168) so we do it ourselves instead.
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PyObject *buf = PyOS_FSPath(handle.ptr());
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if (!buf) {
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PyErr_Clear();
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return false;
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}
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PyObject *native = nullptr;
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if constexpr (std::is_same_v<typename T::value_type, char>) {
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if (PyUnicode_FSConverter(buf, PYBIND11_REINTERPRET_CAST_VOID_PTR_IF_NOT_PYPY(&native))
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!= 0) {
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if (auto *c_str = PyBytes_AsString(native)) {
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// AsString returns a pointer to the internal buffer, which
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// must not be free'd.
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value = c_str;
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}
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}
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} else if constexpr (std::is_same_v<typename T::value_type, wchar_t>) {
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if (PyUnicode_FSDecoder(buf, PYBIND11_REINTERPRET_CAST_VOID_PTR_IF_NOT_PYPY(&native))
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!= 0) {
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if (auto *c_str = PyUnicode_AsWideCharString(native, nullptr)) {
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// AsWideCharString returns a new string that must be free'd.
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value = c_str; // Copies the string.
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PyMem_Free(c_str);
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}
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}
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}
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Py_XDECREF(native);
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Py_DECREF(buf);
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if (PyErr_Occurred()) {
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PyErr_Clear();
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return false;
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}
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return true;
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}
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PYBIND11_TYPE_CASTER(T, io_name("os.PathLike | str | bytes", "pathlib.Path"));
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};
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#endif // PYBIND11_HAS_FILESYSTEM || defined(PYBIND11_HAS_EXPERIMENTAL_FILESYSTEM)
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#if defined(PYBIND11_HAS_FILESYSTEM)
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template <>
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struct type_caster<std::filesystem::path> : public path_caster<std::filesystem::path> {};
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#elif defined(PYBIND11_HAS_EXPERIMENTAL_FILESYSTEM)
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template <>
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struct type_caster<std::experimental::filesystem::path>
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: public path_caster<std::experimental::filesystem::path> {};
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#endif
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PYBIND11_NAMESPACE_END(detail)
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PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)
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#else
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#error "This file should not be included when either TORCH_STABLE_ONLY or TORCH_TARGET_VERSION is defined."
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#endif // !defined(TORCH_STABLE_ONLY) && !defined(TORCH_TARGET_VERSION)
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