FRAGNODE (Windows Embedded CE 6.0)

1/6/2010

This structure keeps track of a fragment. If the fragment is the first one in a file, the dwPrevCluster member refers to the cluster in which its directory entry is located and the dwDirEntryOffset member refers to the byte offset of the directory entry in the cluster. Otherwise, dwPrevCluster refers to the previous cluster in the chain and dwDirEntryOffset is set to FN_NOT_FIRST_FRAG. If the fragment is part of a directory, bit 31 of dwDirEntryOffset is set. If the fragment is the last one in the file, dwNextCluster is set to EOF_CLUSTER.

Syntax

typedef struct _FRAGNODE {
  DWORD dwStartCluster;
  DWORD dwLength;
  DWORD dwPrevCluster;
  DWORD dwNextCluster;
  DWORD dwDirEntryOffset;
  _FRAGNODE* pNext;
} FRAGNODE, *PFRAGNODE;

Members

• dwStartCluster
  Starting cluster of the chain.

• dwLength
  Number of clusters in the fragment.

• dwPrevCluster
  Previous cluster in the chain or cluster in which directory entry is located.

• dwNextCluster
  Next cluster in the chain.

• dwDirEntryOffset
  Byte offset of the directory entry into the cluster.

• pNext
  Next fragmented node in the list.

Requirements

See Also

Reference

FAT File System Structures
DefragVolume