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After the correct cluster has been loaded into memory, the next step is to read and parse all of the entries in it. Each entry is 32 bytes long. For each 32 byte entry this is the flow of execution: |
After the correct cluster has been loaded into memory, the next step is to read and parse all of the entries in it. Each entry is 32 bytes long. For each 32 byte entry this is the flow of execution: |
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# If the first byte of the entry is equal to 0 then there are no more files/directories in this directory. |
# If the first byte of the entry is equal to 0 then there are no more files/directories in this directory. FirstByte==0, finish. FirstByte!=0, goto 2. |
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# If the first byte of the entry is equal to 0xE5 then the entry is unused. |
# If the first byte of the entry is equal to 0xE5 then the entry is unused. FirstByte==0xE5, goto 8, FirstByte!=0xE5, goto 3. |
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# Is this entry a long file name entry? If the 11'th byte of the entry equals 0x0F, then it is a long file name entry. Otherwise, it is not. |
# Is this entry a long file name entry? If the 11'th byte of the entry equals 0x0F, then it is a long file name entry. Otherwise, it is not. 11thByte==0x0F, goto 4. 11thByte!=0x0F, goto 5. |
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# Read the portion of the long filename into a temporary buffer. Goto |
# Read the portion of the long filename into a temporary buffer. Goto 8. |
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# Parse the data for this entry using the table from further up on this page. It would be a good idea to save the data for later. Possibly in a virtual file system structure. goto |
# Parse the data for this entry using the table from further up on this page. It would be a good idea to save the data for later. Possibly in a virtual file system structure. goto 6 |
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# Is there a long file name in the temporary buffer? Yes, goto |
# Is there a long file name in the temporary buffer? Yes, goto 7. No, goto 8 |
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# Apply the long file name to the entry that you just read and clear the temporary buffer. goto |
# Apply the long file name to the entry that you just read and clear the temporary buffer. goto 8 |
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# Increment pointers and/or counters and check the next entry. (goto number 1) |
# Increment pointers and/or counters and check the next entry. (goto number 1) |
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