tests/qemu-iotests/fat16.py

1 # A simple FAT16 driver that is used to test the `vvfat` driver in QEMU.
24     "!#$%&'()-@^_`{}~" + string.digits + string.ascii_uppercase
61     # pylint: disable=too-many-instance-attributes
78         ), "Both total sectors (16 and 32) fields are non-zero"
96             self.root_entries * DIRENTRY_SIZE + self.bytes_per_sector - 1
105     def first_sector_of_cluster(self, cluster: int) -> int:
110             self.data_sector_start() + (cluster - 2) * self.sectors_per_cluster
140     # pylint: disable=too-many-instance-attributes
161     def as_bytes(self) -> bytes:
206     def __call__(self, start_sector: int, num_sectors: int = 1) -> bytes: ...
208 # pylint: disable=broad-exception-raised
232     def read_sectors(self, start_sector: int, num_sectors: int) -> bytes:
236     def write_sectors(self, start_sector: int, data: bytes) -> None:
241     ) -> List[FatDirectoryEntry]:
271     def read_root_directory(self) -> List[FatDirectoryEntry]:
279     def read_fat_entry(self, cluster: int) -> int:
286     def write_fat_entry(self, cluster: int, value: int) -> None:
298     def flush_fats(self) -> None:
308     def next_cluster(self, cluster: int) -> Optional[int]:
327     def next_free_cluster(self) -> int:
337     def next_free_cluster_non_continuous(self) -> int:
355     def read_cluster(self, cluster: int) -> bytes:
364     def write_cluster(self, cluster: int, data: bytes) -> None:
376     ) -> List[FatDirectoryEntry]:
393     ) -> FatDirectoryEntry:
399         def find_free_entry(data: bytes) -> Optional[int]:
454     def update_direntry(self, entry: FatDirectoryEntry) -> None:
466     def find_direntry(self, path: str) -> Optional[FatDirectoryEntry]:
479             is_last = i == len(parts) - 1
500     def read_file(self, entry: Optional[FatDirectoryEntry]) -> Optional[bytes]:
521     ) -> None:
530         def clusters_from_size(size: int) -> int:
532                 size + self.boot_sector.cluster_bytes() - 1
553             for _ in range(current_clusters - 1):
554                 to_add -= 1
565             for _ in range(to_add - 1):
577             for _ in range(required_clusters - 1):
614     def write_file(self, entry: FatDirectoryEntry, data: bytes) -> None:
644     def create_file(self, path: str) -> Optional[FatDirectoryEntry]:
657         parts, filename = parts[:-1], parts[-1]