147     z_stream zstr;  in ParseHeader()  local
148     memset(&zstr, 0, sizeof(zstr));  in ParseHeader()
149     zstr.next_in = (Bytef *)const_cast<uint8_t *>(m_data.GetDataStart() +  in ParseHeader()
151     zstr.avail_in = m_data.BytesLeft(offset);  in ParseHeader()
152     zstr.next_out =  in ParseHeader()
154     zstr.avail_out = decompressed_size;  in ParseHeader()
156     int rc = inflateInit(&zstr);  in ParseHeader()
163     rc = inflate(&zstr, Z_FINISH);  in ParseHeader()
169     rc = inflateEnd(&zstr);  in ParseHeader()
175     if (zstr.total_out != decompressed_size) {  in ParseHeader()
179                zstr.total_out, decompressed_size);  in ParseHeader()