Make it possible to compile with mypyc for approximately 50% speedup.

utils/binary.py

@@ -1,4 +1,5 @@
 from typing import List, Optional, Tuple, cast
+from typing_extensions import Final
 
 
 class BinaryException(Exception):
@@ -7,7 +8,7 @@ class BinaryException(Exception):
 
 class Binary:
 
-    CHUNK_SIZE = 1024
+    CHUNK_SIZE: Final[int] = 1024
 
     @staticmethod
     def _hex(val: int) -> str:

utils/firebeat.py

@@ -1,12 +1,14 @@
 import struct
+from typing_extensions import Final
+
 from lzss import LZSSDecompressor, LZSSFakeCompressor
 
 
 class FirebeatExe:
 
-    PPP_LOAD_OFFSET: int = 0x80000000
-    PPP_IMAGE_HEADER: bytes = b"\x21\x3a\x45\x58\x45\x3a\x30\x30"
-    PPP_IMAGE_FOOTER: bytes = b"\x21\x3a\x45\x58\x45\x3a\x30\x30"
+    PPP_LOAD_OFFSET: Final[int] = 0x80000000
+    PPP_IMAGE_HEADER: Final[bytes] = b"\x21\x3a\x45\x58\x45\x3a\x30\x30"
+    PPP_IMAGE_FOOTER: Final[bytes] = b"\x21\x3a\x45\x58\x45\x3a\x30\x30"
 
     @staticmethod
     def __simple_exe_to_raw(data: bytes) -> bytes:

utils/lzss.py

@@ -1,11 +1,12 @@
 from typing import Generator, List, Optional
+from typing_extensions import Final
 
 
 class LZSSDecompressor:
-    WINDOW_LENGTH = 0x1000
+    WINDOW_LENGTH: Final[int] = 0x1000
 
-    FLAG_COPY = 1
-    FLAG_BACKREF = 0
+    FLAG_COPY: Final[int] = 1
+    FLAG_BACKREF: Final[int] = 0
 
     def __init__(self, data: bytes) -> None:
         self.__decompressed: Optional[bytes] = None
@@ -94,7 +95,7 @@ class LZSSDecompressor:
 
 
 class LZSSFakeCompressor:
-    WINDOW_LENGTH = 0x1000
+    WINDOW_LENGTH: Final[int] = 0x1000
 
     def __init__(self, data: bytes) -> None:
         self.__compressed: Optional[bytes] = None