kopia lustrzana https://github.com/espressif/esp-idf
52 wiersze
2.2 KiB
Python
52 wiersze
2.2 KiB
Python
# SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
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# SPDX-License-Identifier: Apache-2.0
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import os
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import sys
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from typing import Tuple
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from fatfsgen_utils.boot_sector import BootSector
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from fatfsgen_utils.cluster import Cluster
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from fatfsgen_utils.entry import Entry
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from fatfsgen_utils.fat import FAT
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from fatfsgen_utils.fatfs_state import BootSectorState
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from fatfsgen_utils.utils import PAD_CHAR, FATDefaults, read_filesystem
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def get_address_and_name(obj_: dict, state_: BootSectorState) -> Tuple[int, str]:
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cluster_id_ = obj_['DIR_FstClusLO']
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obj_ext_ = obj_['DIR_Name_ext'].rstrip(chr(PAD_CHAR))
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ext_ = f'.{obj_ext_}' if len(obj_ext_) > 0 else ''
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obj_name_ = obj_['DIR_Name'].rstrip(chr(PAD_CHAR)) + ext_
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data_address_ = Cluster.compute_cluster_data_address(state_, cluster_id_)
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return data_address_, obj_name_
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def traverse_folder_tree(directory_address: int, name: str, state_: BootSectorState) -> None:
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if name not in ('.', '..'):
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os.makedirs(name)
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for i in range(state_.sector_size // FATDefaults.ENTRY_SIZE):
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obj_address_ = directory_address + FATDefaults.ENTRY_SIZE * i
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obj_ = Entry.ENTRY_FORMAT_SHORT_NAME.parse(
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fs[obj_address_: obj_address_ + FATDefaults.ENTRY_SIZE])
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if obj_['DIR_Attr'] == Entry.ATTR_ARCHIVE:
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data_address_, obj_name_ = get_address_and_name(obj_, state_)
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content_ = fs[data_address_: data_address_ + state_.sector_size].rstrip(chr(0x00).encode())
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with open(os.path.join(name, obj_name_), 'wb') as new_file:
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new_file.write(content_)
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elif obj_['DIR_Attr'] == Entry.ATTR_DIRECTORY:
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data_address_, obj_name_ = get_address_and_name(obj_, state_)
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if obj_name_ in ('.', '..'):
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continue
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traverse_folder_tree(data_address_, os.path.join(name, obj_name_), state_=state_)
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if __name__ == '__main__':
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fs = read_filesystem(sys.argv[1])
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parser = BootSector()
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parser.parse_boot_sector(fs)
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fat = FAT(parser.boot_sector_state, init_=False)
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traverse_folder_tree(parser.boot_sector_state.root_directory_start,
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parser.boot_sector_state.volume_label.rstrip(chr(PAD_CHAR)),
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parser.boot_sector_state)
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