1 files changed, 178 insertions, 0 deletions
diff --git a/private/utils/ufat/inc/cluster.hxx b/private/utils/ufat/inc/cluster.hxx
new file mode 100644
index 000000000..3c9a82288
--- /dev/null
+++ b/private/utils/ufat/inc/cluster.hxx
@@ -0,0 +1,178 @@
+/*++
+
+Copyright (c) 1990 Microsoft Corporation
+
+Module Name:
+
+    cluster.hxx
+
+Abstract:
+
+    This class models a chain of clusters in a FAT file system.  It gives
+    the ability to refer to a scattered chain of clusters as one contiguous
+    region of memory.  This memory will be acquired from a MEM object at
+    initialization.
+
+Author:
+
+    Norbert P. Kusters (norbertk) 27-Nov-90
+
+--*/
+
+#if !defined(CLUSTER_CHAIN_DEFN)
+
+#define CLUSTER_CHAIN_DEFN
+
+
+#include "secrun.hxx"
+#include "hmem.hxx"
+
+#if defined ( _AUTOCHECK_ )
+#define UFAT_EXPORT
+#elif defined ( _UFAT_MEMBER_ )
+#define UFAT_EXPORT    __declspec(dllexport)
+#else
+#define UFAT_EXPORT    __declspec(dllimport)
+#endif
+
+//
+//    Forward references
+//
+
+DECLARE_CLASS( CLUSTER_CHAIN );
+DECLARE_CLASS( FAT );
+DECLARE_CLASS( FAT_SA );
+DECLARE_CLASS( LOG_IO_DP_DRIVE );
+DECLARE_CLASS( MEM );
+
+class CLUSTER_CHAIN : public OBJECT {
+
+    public:
+
+        UFAT_EXPORT
+        DECLARE_CONSTRUCTOR( CLUSTER_CHAIN );
+
+        VIRTUAL
+        UFAT_EXPORT
+        ~CLUSTER_CHAIN(
+            );
+
+        NONVIRTUAL
+        UFAT_EXPORT
+        BOOLEAN
+        Initialize(
+            IN OUT  PMEM                Mem,
+            IN OUT  PLOG_IO_DP_DRIVE    Drive,
+            IN      PFAT_SA             FatSuperArea,
+            IN      PCFAT               Fat,
+            IN      USHORT              ClusterNumber,
+            IN      USHORT              LengthOfChain DEFAULT 0
+            );
+
+        VIRTUAL
+        UFAT_EXPORT
+        BOOLEAN
+        Read(
+            );
+
+        VIRTUAL
+        UFAT_EXPORT
+        BOOLEAN
+        Write(
+            );
+
+        NONVIRTUAL
+        PVOID
+        GetBuf(
+            );
+
+        NONVIRTUAL
+        USHORT
+        QueryLength(
+            ) CONST;
+
+    private:
+
+        NONVIRTUAL
+        VOID
+        Construct (
+            );
+
+        NONVIRTUAL
+        VOID
+        Destroy(
+            );
+
+        PSECRUN*    _secruns;
+        USHORT      _num_secruns;
+        USHORT      _length_of_chain;
+
+        //
+        // Stuff needed for compressed volumes.
+        //
+
+        BOOLEAN     _is_compressed;
+        PSECRUN     _secrun;
+        PUCHAR      _buf;
+        HMEM        _hmem;
+        PFAT_SA     _fat_sa;
+        PCFAT       _fat;
+        PLOG_IO_DP_DRIVE
+                    _drive;
+        USHORT      _starting_cluster;
+};
+
+
+INLINE
+PVOID
+CLUSTER_CHAIN::GetBuf(
+    )
+/*++
+
+Routine Description:
+
+    This routine returns a pointer to the beginning of the memory map for
+    the cluster chain.
+
+Arguments:
+
+    None.
+
+Return Value:
+
+    A pointer to the beginning of the memory map for the cluster chain.
+
+--*/
+{
+    if (_is_compressed) {
+        return _buf;
+    }
+    return (_secruns && _secruns[0]) ? _secruns[0]->GetBuf() : NULL;
+}
+
+
+INLINE
+USHORT
+CLUSTER_CHAIN::QueryLength(
+    ) CONST
+/*++
+
+Routine Description:
+
+    Computes the number of clusters in the cluster chain.
+
+Arguments:
+
+    None.
+
+Return Value:
+
+    The number of clusters in the cluster chain.
+
+--*/
+{
+    return _length_of_chain;
+}
+
+
+#endif // CLUSTER_CHAIN_DEFN