Handle fast symlinks

Author: Eeems

ext4/block.py

@@ -1,4 +1,3 @@
-# pyright: reportImportCycles=false
 import errno
 import io
 import os

ext4/blockdescriptor.py

@@ -1,4 +1,3 @@
-# pyright: reportImportCycles=false
 from ctypes import (
     c_uint16,
     c_uint32,

ext4/directory.py

@@ -1,4 +1,3 @@
-# pyright: reportImportCycles=false
 from ctypes import (
     addressof,
     c_char,

ext4/enum.py

@@ -1,4 +1,3 @@
-# pyright: reportImportCycles=false
 from ctypes import (
     c_uint8,
     c_uint16,

ext4/extent.py

@@ -1,4 +1,3 @@
-# pyright: reportImportCycles=false
 from collections.abc import Iterator
 from ctypes import (
     c_uint16,

ext4/htree.py

@@ -1,4 +1,3 @@
-# pyright: reportImportCycles=false
 import warnings
 from collections.abc import Generator
 from ctypes import (

ext4/inode.py

@@ -1,4 +1,3 @@
-# pyright: reportImportCycles=false
 from __future__ import annotations
 
 import errno
@@ -482,8 +481,17 @@ def open(
 
 
 class SymbolicLink(Inode):
+    @property
+    def is_fast_symlink(self) -> bool:
+        i_blocks_lo = assert_cast(self.i_blocks_lo, int)  # pyright: ignore[reportAny]
+        return i_blocks_lo == 0 and not self.is_inline
+
     def readlink(self) -> bytes:
-        return self._open().read()
+        if not self.is_fast_symlink:
+            return self._open().read()
+
+        _ = self.volume.seek(self.offset + Inode.i_block.offset)
+        return self.volume.read(self.i_size)
 
 
 class Directory(Inode):

ext4/struct.py

@@ -1,4 +1,3 @@
-# pyright: reportImportCycles=false
 import ctypes
 import errno
 import warnings

ext4/superblock.py

@@ -1,4 +1,3 @@
-# pyright: reportImportCycles=false
 from ctypes import (
     c_ubyte,
     c_uint8,

pyproject.toml

@@ -91,3 +91,4 @@ ignore = [
 [tool.pyright]
 exclude = [".venv", "build"]
 reportMissingTypeStubs = false
+reportImportCycles = false