def find_file(filename:str, file_path_list:list, FCB = {}, disk_data = [], FAT = [], now_path = ''):
search_path = 'C:'
temp_path = ''
position = -1
target_FCB = {}
ret = ''
# 设置8字节全为0的列表
empty_list = bytes([0]*8)
filename_list = filename.split('.')
if now_path == '':
now_path = search_path
else:
temp_path = now_path
if FCB != {}:
target_FCB = FCB
if disk_data == []:
disk_data = disk_open(search_path)
# 获取FAT
FAT = []
for i in range(128):
FAT.append(disk_data[i])
file_FCB_bytes_list = FO.get_path_allFCB_bytes(now_path, disk_data, target_FCB, FAT)
# 将文件名转换成字节型
if len(filename_list) == 1:
filename_bytes = FO.filename_to_bytes(filename_list, 0)
else:
filename_bytes = FO.filename_to_bytes(filename_list)
for i in range(len(file_FCB_bytes_list)):
# 如果找到此文件
if file_FCB_bytes_list[i][0:5] == filename_bytes:
position = i
ret = temp_path + '/' + filename
file_path_list.append(ret)
for i in range(len(file_FCB_bytes_list)):
# 如果找到一个文件目录
if file_FCB_bytes_list[i] != empty_list and bytes_to_FCB(file_FCB_bytes_list[i])['File_class'] == 0:
position = i
# 获取目标文件的字节型FCB并转换格式
target_FCB_bytes = file_FCB_bytes_list[position]
target_FCB = bytes_to_FCB(target_FCB_bytes)
temp_path = temp_path + '/' + str(target_FCB['File_name']).split()[0]
ret = find_file(filename, file_path_list, target_FCB, disk_data, FAT, temp_path)
if ret != False:
break
return ret
def search_file_FCB(path:str, start_block:int = -1) -> list:
search_path = 'C:'
temp_path = ''
position = -1
target_FCB = {}
dir_list = []
# 设置8字节全为0的列表
empty_list = bytes([0]*8)
new_path = path.split('/')[0:-1][-1]
print(new_path)
if start_block != -1:
target_FCB = {
'File_name' : '', # 3B
'File_type' : '', # 2B
'Disk_startblock' : start_block, # 1B 0~255
'File_size' : 0, # 1B 0~255 最大存储相当4个磁盘块大小的文件
'File_class' : 0
}
disk_data = disk_open(search_path)
# 获取FAT
FAT = []
for i in range(128):
FAT.append(disk_data[i])
file_FCB_bytes_list = FO.get_path_allFCB_bytes(new_path, disk_data, target_FCB, FAT)
for i in range(len(file_FCB_bytes_list)):
position = i
# 获取目标文件的字节型FCB并转换格式
target_FCB_bytes = file_FCB_bytes_list[position]
target_FCB = bytes_to_FCB(target_FCB_bytes)
dir_list.append(target_FCB)
return dir_list
def read_disk(filepath_list:list, filename_list:list, disk_data, FAT:list):
position = -1
next_pointer = 1 # 文件路径中指向文件目录的指针
folder_name_list = filepath_list
temp_data_list = []
temp_FCB = {}
# 获取根目录下所有字节型FCB
data_list = FO.get_path_allFCB_bytes(folder_name_list[next_pointer - 1], disk_data)
# 如果在根目录
if next_pointer == len(folder_name_list):
# 获取此目录下所有字节型FCB
temp_data_list = data_list
else:
# 将文件名转换成字节型
filename_bytes = FO.filename_to_bytes(folder_name_list[next_pointer], 0)
for i in range(8):
# 如果找到此文件
if data_list[i][0:5] == filename_bytes:
position = i
break
# 获取目标文件的字节型FCB并转换格式
FCB_bytes = data_list[position]
target_FCB = bytes_to_FCB(FCB_bytes)
temp_FCB = target_FCB
# 获取目标文件FCB中起始盘块号
start_position = get_FCB_block_num(target_FCB)
#获取当前起始盘块号
now_start_block_num = start_position
# 文件目录指针指向文件路径中下一个文件目录
next_pointer = next_pointer + 1
while(next_pointer < len(folder_name_list)):
data_list = []
# 获取此目录下所有字节型FCB
data_list = FO.get_path_allFCB_bytes(folder_name_list[next_pointer], disk_data, temp_FCB, FAT)
temp_data_list = data_list
# 将文件目录名转成字节
filename_bytes = FO.filename_to_bytes(folder_name_list[next_pointer], 0)
for i in range(len(data_list)):
# 如果找到此文件
if data_list[i][0:5] == filename_bytes:
position = i
break
# 获取目标文件的字节型FCB并转换格式
FCB_bytes = data_list[position]
target_FCB = bytes_to_FCB(FCB_bytes)
temp_FCB = target_FCB
# 获取目标文件FCB中起始盘块号
start_position = get_FCB_block_num(target_FCB)
#获取当前起始盘块号
now_start_block_num = start_position
# 文件目录指针指向文件路径中下一个文件目录
next_pointer = next_pointer + 1
# 获取此目录下所有字节型FCB
data_list = FO.get_path_allFCB_bytes(folder_name_list[next_pointer-1], disk_data, temp_FCB, FAT)
temp_data_list = data_list
#==============================
data_list = temp_data_list
'''
data_list = []
# 获取此目录下所有字节型FCB
data_list = FO.get_path_allFCB_bytes(filepath_list, disk_data)
'''
# 将文件名转换成字节型
filename_bytes = FO.filename_to_bytes(filename_list)
for i in range(len(data_list)):
# 如果找到此文件
if data_list[i][0:5] == filename_bytes:
position = i
break
# 获取目标文件的FCB
FCB_bytes = data_list[position]
#print(position)
target_FCB = bytes_to_FCB(FCB_bytes)
#print(target_FCB)
# 获取目标文件FCB中起始盘块号
start_position = get_FCB_block_num(target_FCB)
# 获取文件长度
target_size = target_FCB['File_size']
# 获取文件存储所在的所有块
FAT_list = []
FAT_list.append(start_position)
for i in range(start_position, 128):
if FAT[i] == 129:
break
else:
FAT_list.append(FAT[i])
connect = read_file_connect(start_position, target_size, FAT, disk_data)
return connect
