gbxparser.py 文件源码

def __parse_header(self):
        self.header_length, = struct.unpack('<I', await self.buffer.read(4))
        self.header_chunk_count, = struct.unpack('<I', await self.buffer.read(4))

        self.header_chunks = dict()
        self.header = dict()

        # Save header data from binary.
        for nr in range(self.header_chunk_count):
            chunk_id, = struct.unpack('<I', await self.buffer.read(4))
            chunk_size, = struct.unpack('<I', await self.buffer.read(4))
            self.header_chunks[chunk_id] = chunk_size & ~0x80000000

        # Parse all header chunks.
        for chunk_id, chunk_size in self.header_chunks.items():
            self.strings.reset()
            self.header.update(await self.__parse_chunk(chunk_id, chunk_size))

        return self.header