mitab_priv.h

在linux环境下

    TABMAPObjHdr() {};
    virtual ~TABMAPObjHdr() {};

    static TABMAPObjHdr *NewObj(GByte nNewObjType, GInt32 nId=0);
    static TABMAPObjHdr *ReadNextObj(TABMAPObjectBlock *poObjBlock,
                                     TABMAPHeaderBlock *poHeader);

    GBool       IsCompressedType();
    int         WriteObjTypeAndId(TABMAPObjectBlock *);
    void        SetMBR(GInt32 nMinX, GInt32 nMinY, GInt32 nMaxX, GInt32 mMaxY);

    virtual int WriteObj(TABMAPObjectBlock *) {return -1;};

//  protected:
    virtual int ReadObj(TABMAPObjectBlock *) {return -1;};
};

class TABMAPObjHdrWithCoord: public TABMAPObjHdr
{
  public:
    GInt32      m_nCoordBlockPtr;
    GInt32      m_nCoordDataSize;

    /* Eventually this class may have methods to help maintaining refs to
     * coord. blocks when splitting object blocks.
     */
};


class TABMAPObjNone: public TABMAPObjHdr
{
  public:

    TABMAPObjNone() {};
    virtual ~TABMAPObjNone() {};

    virtual int WriteObj(TABMAPObjectBlock *) {return 0;};

//  protected:
    virtual int ReadObj(TABMAPObjectBlock *) {return 0;};
};


class TABMAPObjPoint: public TABMAPObjHdr
{
  public:
    GInt32      m_nX;
    GInt32      m_nY;
    GByte       m_nSymbolId;

    TABMAPObjPoint() {};
    virtual ~TABMAPObjPoint() {};

    virtual int WriteObj(TABMAPObjectBlock *);

//  protected:
    virtual int ReadObj(TABMAPObjectBlock *);
};

class TABMAPObjFontPoint: public TABMAPObjPoint
{
  public:
    GByte       m_nPointSize;
    GInt16      m_nFontStyle;
    GByte       m_nR;
    GByte       m_nG;
    GByte       m_nB;
    GInt16      m_nAngle;  /* In tenths of degree */
    GByte       m_nFontId;

    TABMAPObjFontPoint() {};
    virtual ~TABMAPObjFontPoint() {};

    virtual int WriteObj(TABMAPObjectBlock *);

//  protected:
    virtual int ReadObj(TABMAPObjectBlock *);
};

class TABMAPObjCustomPoint: public TABMAPObjPoint
{
  public:
    GByte m_nUnknown_;
    GByte m_nCustomStyle;
    GByte m_nFontId;

    TABMAPObjCustomPoint() {};
    virtual ~TABMAPObjCustomPoint() {};

    virtual int WriteObj(TABMAPObjectBlock *);

//  protected:
    virtual int ReadObj(TABMAPObjectBlock *);
};


class TABMAPObjLine: public TABMAPObjHdr
{
  public:
    GInt32      m_nX1;
    GInt32      m_nY1;
    GInt32      m_nX2;
    GInt32      m_nY2;
    GByte       m_nPenId;

    TABMAPObjLine() {};
    virtual ~TABMAPObjLine() {};

    virtual int WriteObj(TABMAPObjectBlock *);

//  protected:
    virtual int ReadObj(TABMAPObjectBlock *);
};

class TABMAPObjPLine: public TABMAPObjHdrWithCoord
{
  public:
    GInt16      m_numLineSections;  /* MULTIPLINE/REGION only. Not in PLINE */
    GInt32      m_nLabelX;      /* Centroid/label location */
    GInt32      m_nLabelY;
    GInt32      m_nComprOrgX;   /* Present only in compressed coord. case */
    GInt32      m_nComprOrgY;
    GByte       m_nPenId;
    GByte       m_nBrushId;
    GBool       m_bSmooth;      /* TRUE if (m_nCoordDataSize & 0x80000000) */

    TABMAPObjPLine() {};
    virtual ~TABMAPObjPLine() {};

    virtual int WriteObj(TABMAPObjectBlock *);

//  protected:
    virtual int ReadObj(TABMAPObjectBlock *);
};

class TABMAPObjRectEllipse: public TABMAPObjHdr
{
  public:
    GInt32      m_nCornerWidth;   /* For rounded rect only */
    GInt32      m_nCornerHeight;
    GByte       m_nPenId;
    GByte       m_nBrushId;

    TABMAPObjRectEllipse() {};
    virtual ~TABMAPObjRectEllipse() {};

    virtual int WriteObj(TABMAPObjectBlock *);

//  protected:
    virtual int ReadObj(TABMAPObjectBlock *);
};

class TABMAPObjArc: public TABMAPObjHdr
{
  public:
    GInt32      m_nStartAngle;
    GInt32      m_nEndAngle;
    GInt32      m_nArcEllipseMinX;  /* MBR of the arc defining ellipse */
    GInt32      m_nArcEllipseMinY;  /* Only present in arcs            */
    GInt32      m_nArcEllipseMaxX;
    GInt32      m_nArcEllipseMaxY;
    GByte       m_nPenId;

    TABMAPObjArc() {};
    virtual ~TABMAPObjArc() {};

    virtual int WriteObj(TABMAPObjectBlock *);

//  protected:
    virtual int ReadObj(TABMAPObjectBlock *);
};


class TABMAPObjText: public TABMAPObjHdrWithCoord
{
  public:
    /* String and its len stored in the nCoordPtr and nCoordSize */

    GInt16      m_nTextAlignment;
    GInt32      m_nAngle;
    GInt16      m_nFontStyle;

    GByte       m_nFGColorR;
    GByte       m_nFGColorG;
    GByte       m_nFGColorB;
    GByte       m_nBGColorR;
    GByte       m_nBGColorG;
    GByte       m_nBGColorB;

    GInt32      m_nLineEndX;
    GInt32      m_nLineEndY;

    GInt32      m_nHeight;
    GByte       m_nFontId;

    GByte       m_nPenId;

    TABMAPObjText() {};
    virtual ~TABMAPObjText() {};

    virtual int WriteObj(TABMAPObjectBlock *);

//  protected:
    virtual int ReadObj(TABMAPObjectBlock *);
};


class TABMAPObjMultiPoint: public TABMAPObjHdrWithCoord
{
  public:
    GInt32      m_nNumPoints;
    GInt32      m_nComprOrgX;   /* Present only in compressed coord. case */
    GInt32      m_nComprOrgY;
    GByte       m_nSymbolId;
    GInt32      m_nLabelX;      /* Not sure if it's a label point, but */
    GInt32      m_nLabelY;      /* it's similar to what we find in PLINE */

    TABMAPObjMultiPoint() {};
    virtual ~TABMAPObjMultiPoint() {};

    virtual int WriteObj(TABMAPObjectBlock *);

//  protected:
    virtual int ReadObj(TABMAPObjectBlock *);
};



/*=====================================================================
          Classes to handle .MAP files low-level blocks
 =====================================================================*/

/*---------------------------------------------------------------------
 *                      class TABBinBlockManager
 *
 * This class is used to keep track of allocated blocks and is used
 * by various classes that need to allocate a new block in a .MAP file.
 *--------------------------------------------------------------------*/
class TABBinBlockManager
{
  protected:
    int         m_nBlockSize;
    GInt32      m_nLastAllocatedBlock;
  public:
    TABBinBlockManager(int nBlockSize=512) {m_nBlockSize=nBlockSize;
                                            m_nLastAllocatedBlock = -1; };
    ~TABBinBlockManager()  {};

    GInt32      AllocNewBlock()   {if (m_nLastAllocatedBlock==-1)
                                        m_nLastAllocatedBlock = 0;
                                   else
                                        m_nLastAllocatedBlock+=m_nBlockSize;
                                   return m_nLastAllocatedBlock; };
    void        Reset()  {m_nLastAllocatedBlock=-1; };
    void        SetLastPtr(int nBlockPtr) {m_nLastAllocatedBlock=nBlockPtr; };
};

/*---------------------------------------------------------------------
 *                      class TABRawBinBlock
 *
 * This is the base class used for all other data block types... it 
 * contains all the base functions to handle binary data.
 *--------------------------------------------------------------------*/

class TABRawBinBlock
{
  protected:
    FILE        *m_fp;          /* Associated file handle               */
    TABAccess   m_eAccess;      /* Read/Write access mode               */

    int         m_nBlockType;

    GByte       *m_pabyBuf;     /* Buffer to contain the block's data    */
    int         m_nBlockSize;   /* Size of current block (and buffer)    */
    int         m_nSizeUsed;    /* Number of bytes used in buffer        */
    GBool       m_bHardBlockSize;/* TRUE=Blocks MUST always be nSize bytes  */
                                 /* FALSE=last block may be less than nSize */
    int         m_nFileOffset;  /* Location of current block in the file */
    int         m_nCurPos;      /* Next byte to read from m_pabyBuf[]    */
    int         m_nFirstBlockPtr;/* Size of file header when different from */
                                 /* block size (used by GotoByteInFile())   */

    int         m_bModified;     /* Used only to detect changes        */

  public:
    TABRawBinBlock(TABAccess eAccessMode = TABRead,
                   GBool bHardBlockSize = TRUE);
    virtual ~TABRawBinBlock();

    virtual int ReadFromFile(FILE *fpSrc, int nOffset, int nSize = 512);
    virtual int CommitToFile();

    virtual int InitBlockFromData(GByte *pabyBuf, int nSize, 
                              GBool bMakeCopy = TRUE,
                              FILE *fpSrc = NULL, int nOffset = 0);
    virtual int InitNewBlock(FILE *fpSrc, int nBlockSize, int nFileOffset=0);

    int         GetBlockType();
    virtual int GetBlockClass() { return TAB_RAWBIN_BLOCK; };

    GInt32      GetStartAddress() {return m_nFileOffset;};
#ifdef DEBUG
    virtual void Dump(FILE *fpOut = NULL);
#endif

    int         GotoByteRel(int nOffset);
    int         GotoByteInBlock(int nOffset);
    int         GotoByteInFile(int nOffset);
    void        SetFirstBlockPtr(int nOffset);

    int         GetNumUnusedBytes();
    int         GetFirstUnusedByteOffset();
    int         GetCurAddress();

    virtual int ReadBytes(int numBytes, GByte *pabyDstBuf);
    GByte       ReadByte();
    GInt16      ReadInt16();
    GInt32      ReadInt32();
    float       ReadFloat();
    double      ReadDouble();

    virtual int WriteBytes(int nBytesToWrite, GByte *pBuf);
    int         WriteByte(GByte byValue);
    int         WriteInt16(GInt16 n16Value);
    int         WriteInt32(GInt32 n32Value);
    int         WriteFloat(float fValue);
    int         WriteDouble(double dValue);
    int         WriteZeros(int nBytesToWrite);
    int         WritePaddedString(int nFieldSize, const char *pszString);

    void        SetModifiedFlag(GBool bModified) {m_bModified=bModified;};

    // This semi-private method gives a direct access to the internal 
    // buffer... to be used with extreme care!!!!!!!!!
    GByte *     GetCurDataPtr() { return (m_pabyBuf + m_nCurPos); } ;
};


/*---------------------------------------------------------------------
 *                      class TABMAPHeaderBlock
 *
 * Class to handle Read/Write operation on .MAP Header Blocks 
 *--------------------------------------------------------------------*/

class TABMAPHeaderBlock: public TABRawBinBlock
{
  protected:
    TABProjInfo m_sProj;

  public:
    TABMAPHeaderBlock(TABAccess eAccessMode = TABRead);
    ~TABMAPHeaderBlock();

    virtual int CommitToFile();

    virtual int InitBlockFromData(GByte *pabyBuf, int nSize, 
                              GBool bMakeCopy = TRUE,
                              FILE *fpSrc = NULL, int nOffset = 0);
    virtual int InitNewBlock(FILE *fpSrc, int nBlockSize, int nFileOffset=0);

    virtual int GetBlockClass() { return TABMAP_HEADER_BLOCK; };

    int         Int2Coordsys(GInt32 nX, GInt32 nY, double &dX, double &dY);
    int         Coordsys2Int(double dX, double dY, GInt32 &nX, GInt32 &nY, 
                             GBool bIgnoreOverflow=FALSE);
    int         ComprInt2Coordsys(GInt32 nCenterX, GInt32 nCenterY, 
                                  int nDeltaX, int nDeltaY, 
                                  double &dX, double &dY);
    int         Int2CoordsysDist(GInt32 nX, GInt32 nY, double &dX, double &dY);
    int         Coordsys2IntDist(double dX, double dY, GInt32 &nX, GInt32 &nY);
    int         SetCoordsysBounds(double dXMin, double dYMin, 
                                  double dXMax, double dYMax);

    int         GetMapObjectSize(int nObjType);
    GBool       MapObjectUsesCoordBlock(int nObjType);

    int         GetProjInfo(TABProjInfo *psProjInfo);
    int         SetProjInfo(TABProjInfo *psProjInfo);

#ifdef DEBUG
    virtual void Dump(FILE *fpOut = NULL);
#endif

    // Instead of having over 30 get/set methods, we'll make all data 
    // members public and we will initialize them in the overloaded
    // LoadFromFile().  For this reason, this class should be used with care.

    GInt16      m_nMAPVersionNumber;
    GInt16      m_nBlockSize;
    
    double      m_dCoordsys2DistUnits;
    GInt32      m_nXMin;
    GInt32      m_nYMin;
    GInt32      m_nXMax;
    GInt32      m_nYMax;
    GBool       m_bIntBoundsOverflow;  // Set to TRUE if coordinates 
                                       // outside of bounds were written

    GInt32      m_nFirstIndexBlock;
    GInt32      m_nFirstGarbageBlock;
    GInt32      m_nFirstToolBlock;
    GInt32      m_numPointObjects;
    GInt32      m_numLineObjects;
    GInt32      m_numRegionObjects;
    GInt32      m_numTextObjects;
    GInt32      m_nMaxCoordBufSize;

    GByte       m_nDistUnitsCode;       // See Appendix F