RustPython · youknowone · Dec 11, 2025 · Dec 11, 2025
diff --git a/Lib/test/test_fnmatch.py b/Lib/test/test_fnmatch.py
@@ -71,7 +71,6 @@ def test_fnmatchcase(self):
         check('usr/bin', 'usr\\bin', False, fnmatchcase)
         check('usr\\bin', 'usr\\bin', True, fnmatchcase)
 
-    @unittest.expectedFailureIfWindows('TODO: RUSTPYTHON')
     def test_bytes(self):
         self.check_match(b'test', b'te*')
         self.check_match(b'test\xff', b'te*\xff')

diff --git a/Lib/test/test_ntpath.py b/Lib/test/test_ntpath.py
@@ -130,8 +130,6 @@ def test_splitdrive(self):
         tester('ntpath.splitdrive("//?/UNC/server/share/dir")',
                ("//?/UNC/server/share", "/dir"))
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailureIfWindows("TODO: RUSTPYTHON")
     def test_splitdrive_invalid_paths(self):
         splitdrive = ntpath.splitdrive
         self.assertEqual(splitdrive('\\\\ser\x00ver\\sha\x00re\\di\x00r'),
@@ -238,8 +236,6 @@ def test_splitroot(self):
         tester('ntpath.splitroot(" :/foo")', (" :", "/", "foo"))
         tester('ntpath.splitroot("/:/foo")', ("", "/", ":/foo"))
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailureIfWindows("TODO: RUSTPYTHON")
     def test_splitroot_invalid_paths(self):
         splitroot = ntpath.splitroot
         self.assertEqual(splitroot('\\\\ser\x00ver\\sha\x00re\\di\x00r'),
@@ -268,8 +264,6 @@ def test_split(self):
         tester('ntpath.split("c:/")', ('c:/', ''))
         tester('ntpath.split("//conky/mountpoint/")', ('//conky/mountpoint/', ''))
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailureIfWindows("TODO: RUSTPYTHON")
     def test_split_invalid_paths(self):
         split = ntpath.split
         self.assertEqual(split('c:\\fo\x00o\\ba\x00r'),
@@ -392,8 +386,6 @@ def test_join(self):
         tester("ntpath.join('D:a', './c:b')", 'D:a\\.\\c:b')
         tester("ntpath.join('D:/a', './c:b')", 'D:\\a\\.\\c:b')
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailureIfWindows("TODO: RUSTPYTHON")
     def test_normcase(self):
         normcase = ntpath.normcase
         self.assertEqual(normcase(''), '')
@@ -409,8 +401,6 @@ def test_normcase(self):
             self.assertEqual(normcase('\u03a9\u2126'.encode()),
                              expected.encode())
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailureIfWindows("TODO: RUSTPYTHON")
     def test_normcase_invalid_paths(self):
         normcase = ntpath.normcase
         self.assertEqual(normcase('abc\x00def'), 'abc\x00def')
@@ -468,8 +458,6 @@ def test_normpath(self):
         tester("ntpath.normpath('\\\\')", '\\\\')
         tester("ntpath.normpath('//?/UNC/server/share/..')", '\\\\?\\UNC\\server\\share\\')
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailureIfWindows("TODO: RUSTPYTHON")
     def test_normpath_invalid_paths(self):
         normpath = ntpath.normpath
         self.assertEqual(normpath('fo\x00o'), 'fo\x00o')
@@ -1130,8 +1118,6 @@ def test_abspath(self):
             drive, _ = ntpath.splitdrive(cwd_dir)
             tester('ntpath.abspath("/abc/")', drive + "\\abc")
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailureIfWindows("TODO: RUSTPYTHON")
     def test_abspath_invalid_paths(self):
         abspath = ntpath.abspath
         if sys.platform == 'win32':
@@ -1438,8 +1424,6 @@ def test_isfile_anonymous_pipe(self):
             os.close(pr)
             os.close(pw)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailureIfWindows("TODO: RUSTPYTHON")
     @unittest.skipIf(sys.platform != 'win32', "windows only")
     def test_isfile_named_pipe(self):
         import _winapi

diff --git a/Lib/test/test_posixpath.py b/Lib/test/test_posixpath.py
@@ -189,8 +189,6 @@ def test_dirname(self):
         self.assertEqual(posixpath.dirname(b"////foo"), b"////")
         self.assertEqual(posixpath.dirname(b"//foo//bar"), b"//foo")
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailureIfWindows("TODO: RUSTPYTHON")
     def test_islink(self):
         self.assertIs(posixpath.islink(TESTFN + "1"), False)
         self.assertIs(posixpath.lexists(TESTFN + "2"), False)
@@ -236,8 +234,6 @@ def test_ismount_invalid_paths(self):
         self.assertIs(posixpath.ismount('/\x00'), False)
         self.assertIs(posixpath.ismount(b'/\x00'), False)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailureIfWindows("TODO: RUSTPYTHON")
     @os_helper.skip_unless_symlink
     def test_ismount_symlinks(self):
         # Symlinks are never mountpoints.

diff --git a/crates/vm/src/stdlib/nt.rs b/crates/vm/src/stdlib/nt.rs
@@ -570,6 +570,151 @@ pub(crate) mod module {
         Ok(path.mode.process_path(buffer.to_os_string(), vm))
     }
 
+    /// Implements CPython's _Py_skiproot logic for Windows paths
+    /// Returns (drive_size, root_size) where:
+    /// - drive_size: length of the drive/UNC portion
+    /// - root_size: length of the root separator (0 or 1)
+    fn skiproot(path: &[u16]) -> (usize, usize) {
+        let len = path.len();
+        if len == 0 {
+            return (0, 0);
+        }
+
+        const SEP: u16 = b'\\' as u16;
+        const ALTSEP: u16 = b'/' as u16;
+        const COLON: u16 = b':' as u16;
+
+        let is_sep = |c: u16| c == SEP || c == ALTSEP;
+        let get = |i: usize| path.get(i).copied().unwrap_or(0);
+
+        if is_sep(get(0)) {
+            if is_sep(get(1)) {
+                // UNC or device path: \\server\share or \\?\device
+                // Check for \\?\UNC\server\share
+                let idx = if len >= 8
+                    && get(2) == b'?' as u16
+                    && is_sep(get(3))
+                    && (get(4) == b'U' as u16 || get(4) == b'u' as u16)
+                    && (get(5) == b'N' as u16 || get(5) == b'n' as u16)
+                    && (get(6) == b'C' as u16 || get(6) == b'c' as u16)
+                    && is_sep(get(7))
+                {
+                    8
+                } else {
+                    2
+                };
+
+                // Find the end of server name
+                let mut i = idx;
+                while i < len && !is_sep(get(i)) {
+                    i += 1;
+                }
+
+                if i >= len {
+                    // No share part: \\server
+                    return (i, 0);
+                }
+
+                // Skip separator and find end of share name
+                i += 1;
+                while i < len && !is_sep(get(i)) {
+                    i += 1;
+                }
+
+                // drive = \\server\share, root = \ (if present)
+                if i >= len { (i, 0) } else { (i, 1) }
+            } else {
+                // Relative path with root: \Windows
+                (0, 1)
+            }
+        } else if len >= 2 && get(1) == COLON {
+            // Drive letter path
+            if len >= 3 && is_sep(get(2)) {
+                // Absolute: X:\Windows
+                (2, 1)
+            } else {
+                // Relative with drive: X:Windows
+                (2, 0)
+            }
+        } else {
+            // Relative path: Windows
+            (0, 0)
+        }
+    }
+
+    #[pyfunction]
+    fn _path_splitroot_ex(path: crate::PyObjectRef, vm: &VirtualMachine) -> PyResult<PyTupleRef> {
+        use crate::builtins::{PyBytes, PyStr};
+        use rustpython_common::wtf8::Wtf8Buf;
+
+        // Handle path-like objects via os.fspath, but without null check (nonstrict=True in CPython)
+        let path = if let Some(fspath) = vm.get_method(path.clone(), identifier!(vm, __fspath__)) {
+            fspath?.call((), vm)?
+        } else {
+            path
+        };
+
+        // Convert to wide string, validating UTF-8 for bytes input
+        let (wide, is_bytes): (Vec<u16>, bool) = if let Some(s) = path.downcast_ref::<PyStr>() {
+            // Use encode_wide which handles WTF-8 (including surrogates)
+            let wide: Vec<u16> = s.as_wtf8().encode_wide().collect();
+            (wide, false)
+        } else if let Some(b) = path.downcast_ref::<PyBytes>() {
+            // On Windows, bytes must be valid UTF-8 - this raises UnicodeDecodeError if not
+            let s = std::str::from_utf8(b.as_bytes()).map_err(|e| {
+                vm.new_exception_msg(
+                    vm.ctx.exceptions.unicode_decode_error.to_owned(),
+                    format!(
+                        "'utf-8' codec can't decode byte {:#x} in position {}: invalid start byte",
+                        b.as_bytes().get(e.valid_up_to()).copied().unwrap_or(0),
+                        e.valid_up_to()
+                    ),
+                )
+            })?;
+            let wide: Vec<u16> = s.encode_utf16().collect();
+            (wide, true)
+        } else {
+            return Err(vm.new_type_error(format!(
+                "expected str or bytes, not {}",
+                path.class().name()
+            )));
+        };
+
+        // Normalize slashes for parsing
+        let normalized: Vec<u16> = wide
+            .iter()
+            .map(|&c| if c == b'/' as u16 { b'\\' as u16 } else { c })
+            .collect();
+
+        let (drv_size, root_size) = skiproot(&normalized);
+
+        // Return as bytes if input was bytes, preserving the original content
+        if is_bytes {
+            // Convert UTF-16 back to UTF-8 for bytes output
+            let drv = String::from_utf16(&wide[..drv_size])
+                .map_err(|e| vm.new_unicode_decode_error(e.to_string()))?;
+            let root = String::from_utf16(&wide[drv_size..drv_size + root_size])
+                .map_err(|e| vm.new_unicode_decode_error(e.to_string()))?;
+            let tail = String::from_utf16(&wide[drv_size + root_size..])
+                .map_err(|e| vm.new_unicode_decode_error(e.to_string()))?;
+            Ok(vm.ctx.new_tuple(vec![
+                vm.ctx.new_bytes(drv.into_bytes()).into(),
+                vm.ctx.new_bytes(root.into_bytes()).into(),
+                vm.ctx.new_bytes(tail.into_bytes()).into(),
+            ]))
+        } else {
+            // For str output, use WTF-8 to handle surrogates
+            let drv = Wtf8Buf::from_wide(&wide[..drv_size]);
+            let root = Wtf8Buf::from_wide(&wide[drv_size..drv_size + root_size]);
+            let tail = Wtf8Buf::from_wide(&wide[drv_size + root_size..]);
+            Ok(vm.ctx.new_tuple(vec![
+                vm.ctx.new_str(drv).into(),
+                vm.ctx.new_str(root).into(),
+                vm.ctx.new_str(tail).into(),
+            ]))
+        }
+    }
+
     #[pyfunction]
     fn _path_splitroot(path: OsPath, vm: &VirtualMachine) -> PyResult<(String, String)> {
         let orig: Vec<_> = path.path.to_wide();

diff --git a/crates/vm/src/stdlib/winapi.rs b/crates/vm/src/stdlib/winapi.rs
@@ -540,4 +540,133 @@ mod _winapi {
             windows_sys::Win32::System::Threading::ReleaseMutex(handle as _)
         })
     }
+
+    // LOCALE_NAME_INVARIANT is an empty string in Windows API
+    #[pyattr]
+    const LOCALE_NAME_INVARIANT: &str = "";
+
+    /// LCMapStringEx - Map a string to another string using locale-specific rules
+    /// This is used by ntpath.normcase() for proper Windows case conversion
+    #[pyfunction]
+    fn LCMapStringEx(
+        locale: PyStrRef,
+        flags: u32,
+        src: PyStrRef,
+        vm: &VirtualMachine,
+    ) -> PyResult<PyStrRef> {
+        use rustpython_common::wtf8::Wtf8Buf;
+        use windows_sys::Win32::Globalization::{
+            LCMAP_BYTEREV, LCMAP_HASH, LCMAP_SORTHANDLE, LCMAP_SORTKEY,
+            LCMapStringEx as WinLCMapStringEx,
+        };
+
+        // Reject unsupported flags (same as CPython)
+        if flags & (LCMAP_SORTHANDLE | LCMAP_HASH | LCMAP_BYTEREV | LCMAP_SORTKEY) != 0 {
+            return Err(vm.new_value_error("unsupported flags"));
+        }
+
+        // Use encode_wide() which properly handles WTF-8 (including surrogates)
+        let locale_wide: Vec<u16> = locale
+            .as_wtf8()
+            .encode_wide()
+            .chain(std::iter::once(0))
+            .collect();
+        let src_wide: Vec<u16> = src.as_wtf8().encode_wide().collect();
+
+        if src_wide.len() > i32::MAX as usize {
+            return Err(vm.new_overflow_error("input string is too long".to_string()));
+        }
+
+        // First call to get required buffer size
+        let dest_size = unsafe {
+            WinLCMapStringEx(
+                locale_wide.as_ptr(),
+                flags,
+                src_wide.as_ptr(),
+                src_wide.len() as i32,
+                null_mut(),
+                0,
+                null(),
+                null(),
+                0,
+            )
+        };
+
+        if dest_size <= 0 {
+            return Err(vm.new_last_os_error());
+        }
+
+        // Second call to perform the mapping
+        let mut dest = vec![0u16; dest_size as usize];
+        let nmapped = unsafe {
+            WinLCMapStringEx(
+                locale_wide.as_ptr(),
+                flags,
+                src_wide.as_ptr(),
+                src_wide.len() as i32,
+                dest.as_mut_ptr(),
+                dest_size,
+                null(),
+                null(),
+                0,
+            )
+        };
+
+        if nmapped <= 0 {
+            return Err(vm.new_last_os_error());
+        }
+
+        dest.truncate(nmapped as usize);
+
+        // Convert UTF-16 back to WTF-8 (handles surrogates properly)
+        let result = Wtf8Buf::from_wide(&dest);
+        Ok(vm.ctx.new_str(result))
+    }
+
+    #[derive(FromArgs)]
+    struct CreateNamedPipeArgs {
+        #[pyarg(positional)]
+        name: PyStrRef,
+        #[pyarg(positional)]
+        open_mode: u32,
+        #[pyarg(positional)]
+        pipe_mode: u32,
+        #[pyarg(positional)]
+        max_instances: u32,
+        #[pyarg(positional)]
+        out_buffer_size: u32,
+        #[pyarg(positional)]
+        in_buffer_size: u32,
+        #[pyarg(positional)]
+        default_timeout: u32,
+        #[pyarg(positional)]
+        _security_attributes: PyObjectRef, // Ignored, can be None
+    }
+
+    /// CreateNamedPipe - Create a named pipe
+    #[pyfunction]
+    fn CreateNamedPipe(args: CreateNamedPipeArgs, vm: &VirtualMachine) -> PyResult<WinHandle> {
+        use windows_sys::Win32::System::Pipes::CreateNamedPipeW;
+
+        let name_wide = args.name.as_str().to_wide_with_nul();
+
+        let handle = unsafe {
+            CreateNamedPipeW(
+                name_wide.as_ptr(),
+                args.open_mode,
+                args.pipe_mode,
+                args.max_instances,
+                args.out_buffer_size,
+                args.in_buffer_size,
+                args.default_timeout,
+                null(), // security_attributes - NULL for now
+            )
+        };
+
+        if handle == INVALID_HANDLE_VALUE {
+            return Err(vm.new_last_os_error());
+        }
+
+        Ok(WinHandle(handle))
+    }
 }