Random access uncompressed unencrypted ZipExtFile

Author: 5ec1cff

Lib/zipfile/__init__.py

@@ -1162,13 +1162,16 @@ def seek(self, offset, whence=os.SEEK_SET):
             self._offset = buff_offset
             read_offset = 0
         # Fast seek uncompressed unencrypted file
-        elif self._compress_type == ZIP_STORED and self._decrypter is None and read_offset > 0:
+        elif self._compress_type == ZIP_STORED and self._decrypter is None:
             # disable CRC checking after first seeking - it would be invalid
             self._expected_crc = None
             # seek actual file taking already buffered data into account
             read_offset -= len(self._readbuffer) - self._offset
             self._fileobj.seek(read_offset, os.SEEK_CUR)
             self._left -= read_offset
+            self._compress_left -= read_offset
+            if self._eof and read_offset < 0:
+                self._eof = False
             read_offset = 0
             # flush read buffer
             self._readbuffer = b''