typedef struct tagLZI {
   BYTE *rgbyteRingBuf;  // ring buffer for expansion
   BYTE *rgbyteInBuf;    // input buffer for reads
   BYTE *pbyteInBufEnd;  // pointer past end of rgbyteInBuf[]
   BYTE *pbyteInBuf;     // pointer to next byte to read from
   BYTE *rgbyteOutBuf;   // output buffer for writes
   BYTE *pbyteOutBufEnd; // pointer past end of rgbyteOutBuf[]
   BYTE *pbyteOutBuf;    // pointer to last byte to write from
   // Flag indicating whether or not rgbyteInBuf[0], which holds the last byte
   // from the previous input buffer, should be read as the next input byte.
   // (Only used so that at least one unReadUChar() can be done at all input
   // buffer positions.)
   BOOL bLastUsed;
   // Actually, rgbyteInBuf[] has length (ucbInBufLen + 1) since rgbyteInBuf[0]
   // is used when bLastUsed is TRUE.
   INT cbMaxMatchLen;         // longest match length for current algorithm
   LONG cblInSize,       // size in bytes of input file
        cblOutSize;      // size in bytes of output file
   DWORD ucbInBufLen,    // length of input buffer
        ucbOutBufLen;    // length of output buffer
   DWORD uFlags;        // LZ decoding description byte
   INT iCurRingBufPos;     // ring buffer offset
   INT *leftChild;      // parents and left and right
   INT *rightChild;     // children that make up the
   INT *parent;         // binary search trees

   INT iCurMatch,          // index of longest match (set by LZInsertNode())
       cbCurMatch;         // length of longest match (set by LZInsertNode())

} LZINFO;

typedef LZINFO *PLZINFO;

typedef struct _dcx {
    INT dcxDiamondLastIoError;
    HFDI dcxFdiContext;
    ERF dcxFdiError;
} DIAMOND_CONTEXT;

typedef DIAMOND_CONTEXT *PDIAMOND_CONTEXT;


extern DWORD itlsDiamondContext;

#define ITLS_ERROR          (0xFFFFFFFF)

#define GotDmdTlsSlot()     (itlsDiamondContext != ITLS_ERROR)
#define GotDmdContext()     (TlsGetValue(itlsDiamondContext) != NULL)

#define FdiContext          (((GotDmdTlsSlot() && GotDmdContext()) ? ((PDIAMOND_CONTEXT)(TlsGetValue(itlsDiamondContext)))->dcxFdiContext : NULL))
#define SetFdiContext(v)    (((PDIAMOND_CONTEXT)(TlsGetValue(itlsDiamondContext)))->dcxFdiContext = (v))
#define FdiError            (((PDIAMOND_CONTEXT)(TlsGetValue(itlsDiamondContext)))->dcxFdiError)
#define DiamondLastIoError  (((PDIAMOND_CONTEXT)(TlsGetValue(itlsDiamondContext)))->dcxDiamondLastIoError)

BOOL
InitDiamond(
    VOID
    );

VOID
TermDiamond(
    VOID
    );

BOOL
IsDiamondFile(
    IN PSTR FileName
    );

INT
ExpandDiamondFile(
    IN  PSTR       SourceFileName,  // Because LZOpen ... returns ASCII!
    IN  PTSTR      TargetFileName,
    IN  BOOL       RenameTarget,
    OUT PLZINFO    pLZI
    );