NTFS General Information > NTFS Basics > exFAT Overview > Up-Case Table Directory Entry

Up-Case Table Directory Entry

Offset

Size

Description

Comments

0 (0x00)

1

EntryType

 0x82

1 (0x01)

3

Reserved1

  

4 (0x04)

4

TableChecksum

 Up-case Table checksum

8 (0x08)

12

Reserved2

  

20 (0x14)

4

FirstCluster

  

24 (0x18)

8

DataLength

  

The checksum is calculated against DataLength bytes of Up-case Table according to the following code:

UNIT32 UpCaseTableChecksum(constunsignedchardata[], intbytes)
{
UINT32 checksum   =   0;
for (inti = 0; i < bytes; i++)
checksum = (checksum<< 31) | (checksum>> 1) + data[i];
returnchecksum;
}

 

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