tabmapobjline.cpp

linux下一款GIS程序源码

// tabmapobjline.cpp: implementation of the TABMAPObjLine class.
//
//////////////////////////////////////////////////////////////////////

#include "tabmapobjline.h"

#include "ugk_errhandle.h"

/**********************************************************************
 *                   TABMAPObjLine::ReadObj()
 *
 * Read Object information starting after the object id which should 
 * have been read by TABMAPObjHdr::ReadNextObj() already.
 * This function should be called only by TABMAPObjHdr::ReadNextObj().
 *
 * Returns 0 on success, -1 on error.
 **********************************************************************/
int TABMAPObjLine::ReadObj(TABMAPObjectBlock *poObjBlock)
{
    poObjBlock->ReadIntCoord(IsCompressedType(), m_nX1, m_nY1);
    poObjBlock->ReadIntCoord(IsCompressedType(), m_nX2, m_nY2);

    m_nPenId = poObjBlock->ReadByte();      // Pen index

    SetMBR(m_nX1, m_nY1, m_nX2, m_nY2);

    if (UGKGetLastErrorNo() != 0)
        return -1;

    return 0;
}

/**********************************************************************
 *                   TABMAPObjLine::WriteObj()
 *
 * Write Object information with the type+object id
 *
 * Returns 0 on success, -1 on error.
 **********************************************************************/
int TABMAPObjLine::WriteObj(TABMAPObjectBlock *poObjBlock)
{
    // Write object type and id
    TABMAPObjHdr::WriteObjTypeAndId(poObjBlock);

    poObjBlock->WriteIntCoord(m_nX1, m_nY1, IsCompressedType());
    poObjBlock->WriteIntCoord(m_nX2, m_nY2, IsCompressedType());

    poObjBlock->WriteByte(m_nPenId);      // Pen index

    if (UGKGetLastErrorNo() != 0)
        return -1;

    return 0;
}