mitab_mapfile.cpp

GIS系统支持库Geospatial Data Abstraction Library代码.GDAL is a translator library for raster geospatial dat

        {
            // Failed... an error has already been reported.
            delete poBlock;
            return -1;
        }

        poBlock->GotoByteInBlock(8);

        nStatus = m_poToolDefTable->ReadAllToolDefs(poBlock);
        delete poBlock;
    }

    return nStatus;
}


/**********************************************************************
 *                   TABMAPFile::CommitDrawingTools()
 *
 * Write the drawing tools for this file.
 *
 * This function applies only to write access mode.
 * 
 * Returns 0 on success, -1 on error.
 **********************************************************************/
int TABMAPFile::CommitDrawingTools()
{
    int nStatus = 0;

    if (m_eAccessMode != TABWrite || m_poHeader == NULL)
    {
        CPLError(CE_Failure, CPLE_AssertionFailed,
            "CommitDrawingTools() failed: file not opened for write access.");
        return -1;
    }

    if (m_poToolDefTable == NULL ||
        (m_poToolDefTable->GetNumPen() +
         m_poToolDefTable->GetNumBrushes() +
         m_poToolDefTable->GetNumFonts() +
         m_poToolDefTable->GetNumSymbols()) == 0)
    {
        return 0;       // Nothing to do!
    }

    /*-------------------------------------------------------------
     * Create a new TABMAPToolBlock and update header fields
     *------------------------------------------------------------*/
    TABMAPToolBlock *poBlock;
    
    poBlock = new TABMAPToolBlock(m_eAccessMode);
    poBlock->InitNewBlock(m_fp, 512, m_oBlockManager.AllocNewBlock());
    poBlock->SetMAPBlockManagerRef(&m_oBlockManager);

    m_poHeader->m_nFirstToolBlock = poBlock->GetStartAddress();

    m_poHeader->m_numPenDefs = m_poToolDefTable->GetNumPen();
    m_poHeader->m_numBrushDefs = m_poToolDefTable->GetNumBrushes();
    m_poHeader->m_numFontDefs = m_poToolDefTable->GetNumFonts();
    m_poHeader->m_numSymbolDefs = m_poToolDefTable->GetNumSymbols();

    /*-------------------------------------------------------------
     * Do the actual work and delete poBlock
     * (Note that poBlock will have already been committed to the file
     * by WriteAllToolDefs() )
     *------------------------------------------------------------*/
    nStatus = m_poToolDefTable->WriteAllToolDefs(poBlock);
    
    m_poHeader->m_numMapToolBlocks = poBlock->GetNumBlocksInChain();

    delete poBlock;

    return nStatus;
}


/**********************************************************************
 *                   TABMAPFile::ReadPenDef()
 *
 * Fill the TABPenDef structure with the definition of the specified pen
 * index... (1-based pen index)
 *
 * If nPenIndex==0 or is invalid, then the structure is cleared.
 *
 * Returns 0 on success, -1 on error (i.e. Pen not found).
 **********************************************************************/
int   TABMAPFile::ReadPenDef(int nPenIndex, TABPenDef *psDef)
{
    TABPenDef *psTmp;

    if (m_poToolDefTable == NULL && InitDrawingTools() != 0)
        return -1;

    if (psDef && m_poToolDefTable &&
        (psTmp = m_poToolDefTable->GetPenDefRef(nPenIndex)) != NULL)
    {
        *psDef = *psTmp;
    }
    else if (psDef)
    {
        /* Init to MapInfo default */
        static const TABPenDef csDefaultPen = MITAB_PEN_DEFAULT;
        *psDef = csDefaultPen;
        return -1;
    }
    return 0;
}

/**********************************************************************
 *                   TABMAPFile::WritePenDef()
 *
 * Write a Pen Tool to the map file and return the pen index that has
 * been attributed to this Pen tool definition, or -1 if something went
 * wrong
 *
 * Note that the returned index is a 1-based index.  A value of 0 
 * indicates "none" in MapInfo.

 * Returns a value >= 0 on success, -1 on error
 **********************************************************************/
int   TABMAPFile::WritePenDef(TABPenDef *psDef)
{
    if (psDef == NULL || 
        (m_poToolDefTable == NULL && InitDrawingTools() != 0) ||
        m_poToolDefTable==NULL )
    {
        return -1;
    }

    return m_poToolDefTable->AddPenDefRef(psDef);
}


/**********************************************************************
 *                   TABMAPFile::ReadBrushDef()
 *
 * Fill the TABBrushDef structure with the definition of the specified Brush
 * index... (1-based Brush index)
 *
 * If nBrushIndex==0 or is invalid, then the structure is cleared.
 *
 * Returns 0 on success, -1 on error (i.e. Brush not found).
 **********************************************************************/
int   TABMAPFile::ReadBrushDef(int nBrushIndex, TABBrushDef *psDef)
{
    TABBrushDef *psTmp;

    if (m_poToolDefTable == NULL && InitDrawingTools() != 0)
        return -1;

    if (psDef && m_poToolDefTable &&
        (psTmp = m_poToolDefTable->GetBrushDefRef(nBrushIndex)) != NULL)
    {
        *psDef = *psTmp;
    }
    else if (psDef)
    {
        /* Init to MapInfo default */
        static const TABBrushDef csDefaultBrush = MITAB_BRUSH_DEFAULT;
        *psDef = csDefaultBrush;
        return -1;
    }
    return 0;
}

/**********************************************************************
 *                   TABMAPFile::WriteBrushDef()
 *
 * Write a Brush Tool to the map file and return the Brush index that has
 * been attributed to this Brush tool definition, or -1 if something went
 * wrong
 *
 * Note that the returned index is a 1-based index.  A value of 0 
 * indicates "none" in MapInfo.

 * Returns a value >= 0 on success, -1 on error
 **********************************************************************/
int   TABMAPFile::WriteBrushDef(TABBrushDef *psDef)
{
    if (psDef == NULL || 
        (m_poToolDefTable == NULL && InitDrawingTools() != 0) ||
        m_poToolDefTable==NULL )
    {
        return -1;
    }

    return m_poToolDefTable->AddBrushDefRef(psDef);
}


/**********************************************************************
 *                   TABMAPFile::ReadFontDef()
 *
 * Fill the TABFontDef structure with the definition of the specified Font
 * index... (1-based Font index)
 *
 * If nFontIndex==0 or is invalid, then the structure is cleared.
 *
 * Returns 0 on success, -1 on error (i.e. Font not found).
 **********************************************************************/
int   TABMAPFile::ReadFontDef(int nFontIndex, TABFontDef *psDef)
{
    TABFontDef *psTmp;

    if (m_poToolDefTable == NULL && InitDrawingTools() != 0)
        return -1;

    if (psDef && m_poToolDefTable &&
        (psTmp = m_poToolDefTable->GetFontDefRef(nFontIndex)) != NULL)
    {
        *psDef = *psTmp;
    }
    else if (psDef)
    {
        /* Init to MapInfo default */
        static const TABFontDef csDefaultFont = MITAB_FONT_DEFAULT;
        *psDef = csDefaultFont;
        return -1;
    }
    return 0;
}

/**********************************************************************
 *                   TABMAPFile::WriteFontDef()
 *
 * Write a Font Tool to the map file and return the Font index that has
 * been attributed to this Font tool definition, or -1 if something went
 * wrong
 *
 * Note that the returned index is a 1-based index.  A value of 0 
 * indicates "none" in MapInfo.

 * Returns a value >= 0 on success, -1 on error
 **********************************************************************/
int   TABMAPFile::WriteFontDef(TABFontDef *psDef)
{
    if (psDef == NULL || 
        (m_poToolDefTable == NULL && InitDrawingTools() != 0) ||
        m_poToolDefTable==NULL )
    {
        return -1;
    }

    return m_poToolDefTable->AddFontDefRef(psDef);
}

/**********************************************************************
 *                   TABMAPFile::ReadSymbolDef()
 *
 * Fill the TABSymbolDef structure with the definition of the specified Symbol
 * index... (1-based Symbol index)
 *
 * If nSymbolIndex==0 or is invalid, then the structure is cleared.
 *
 * Returns 0 on success, -1 on error (i.e. Symbol not found).
 **********************************************************************/
int   TABMAPFile::ReadSymbolDef(int nSymbolIndex, TABSymbolDef *psDef)
{
    TABSymbolDef *psTmp;

    if (m_poToolDefTable == NULL && InitDrawingTools() != 0)
        return -1;

    if (psDef && m_poToolDefTable &&
        (psTmp = m_poToolDefTable->GetSymbolDefRef(nSymbolIndex)) != NULL)
    {
        *psDef = *psTmp;
    }
    else if (psDef)
    {
        /* Init to MapInfo default */
        static const TABSymbolDef csDefaultSymbol = MITAB_SYMBOL_DEFAULT;
        *psDef = csDefaultSymbol;
        return -1;
    }
    return 0;
}

/**********************************************************************
 *                   TABMAPFile::WriteSymbolDef()
 *
 * Write a Symbol Tool to the map file and return the Symbol index that has
 * been attributed to this Symbol tool definition, or -1 if something went
 * wrong
 *
 * Note that the returned index is a 1-based index.  A value of 0 
 * indicates "none" in MapInfo.

 * Returns a value >= 0 on success, -1 on error
 **********************************************************************/
int   TABMAPFile::WriteSymbolDef(TABSymbolDef *psDef)
{
    if (psDef == NULL || 
        (m_poToolDefTable == NULL && InitDrawingTools() != 0) ||
        m_poToolDefTable==NULL )
    {
        return -1;
    }

    return m_poToolDefTable->AddSymbolDefRef(psDef);
}

#define ORDER_MIN_MAX(type,min,max)                                    \
    {   if( (max) < (min) )                                            \
          { type temp = (max); (max) = (min); (min) = temp; } }

/**********************************************************************
 *                   TABMAPFile::SetCoordFilter()
 *
 * Set the MBR of the area of interest... only objects that at least 
 * overlap with that area will be returned.
 *
 * @param sMin minimum x/y the file's projection coord.
 * @param sMax maximum x/y the file's projection coord.
 **********************************************************************/
void TABMAPFile::SetCoordFilter(TABVertex sMin, TABVertex sMax)
{
    m_sMinFilter = sMin;
    m_sMaxFilter = sMax;

    Coordsys2Int(sMin.x, sMin.y, m_XMinFilter, m_YMinFilter, TRUE);
    Coordsys2Int(sMax.x, sMax.y, m_XMaxFilter, m_YMaxFilter, TRUE);

    ORDER_MIN_MAX(int,m_XMinFilter,m_XMaxFilter);
    ORDER_MIN_MAX(int,m_YMinFilter,m_YMaxFilter);
    ORDER_MIN_MAX(double,m_sMinFilter.x,m_sMaxFilter.x);
    ORDER_MIN_MAX(double,m_sMinFilter.y,m_sMaxFilter.y);
}

/**********************************************************************
 *                   TABMAPFile::ResetCoordFilter()
 *
 * Reset the MBR of the area of interest to be the extents as defined
 * in the header. 
 **********************************************************************/

void TABMAPFile::ResetCoordFilter()

{
    m_XMinFilter = m_poHeader->m_nXMin;
    m_YMinFilter = m_poHeader->m_nYMin;
    m_XMaxFilter = m_poHeader->m_nXMax;
    m_YMaxFilter = m_poHeader->m_nYMax;
    Int2Coordsys(m_XMinFilter, m_YMinFilter,
                 m_sMinFilter.x, m_sMinFilter.y);
    Int2Coordsys(m_XMaxFilter, m_YMaxFilter, 
                 m_sMaxFilter.x, m_sMaxFilter.y);

    ORDER_MIN_MAX(int,m_XMinFilter,m_XMaxFilter);
    ORDER_MIN_MAX(int,m_YMinFilter,m_YMaxFilter);
    ORDER_MIN_MAX(double,m_sMinFilter.x,m_sMaxFilter.x);
    ORDER_MIN_MAX(double,m_sMinFilter.y,m_sMaxFilter.y);
}

/**********************************************************************
 *                   TABMAPFile::GetCoordFilter()
 *
 * Get the MBR of the area of interest, as previously set by
 * SetCoordFilter().
 *
 * @param sMin vertex into which the minimum x/y values put in coordsys space.
 * @param sMax vertex into which the maximum x/y values put in coordsys space.
 **********************************************************************/
void TABMAPFile::GetCoordFilter(TABVertex &sMin, TABVerte