mitab_miffile.cpp

用于读取TAB、MIF、SHP文件的类

//             {
//                 dXMin = atof(papszFields[++iBounds]);
//                 dYMin = atof(papszFields[++iBounds]);
//                 dXMax = atof(papszFields[++iBounds]);
//                 dYMax = atof(papszFields[++iBounds]);
//                 bBoundsSet = TRUE;
//             }
//             CSLDestroy( papszFields );
        }
        else if (EQUALN(pszLine,"TRANSFORM",9))
        {
//             papszToken = CSLTokenizeStringComplex(pszLine," ,\t",TRUE,FALSE); 
//             bColumns = FALSE; bCoordSys = FALSE;
//           
//             if (CSLCount(papszToken) == 5)
//             {
//                 dfXMultiplier   = atof(papszToken[1]);
//                 dfYMultiplier   = atof(papszToken[2]);
//                 dfXDisplacement = atof(papszToken[3]);
//                 dfYDisplacement = atof(papszToken[4]);
//                 
//                 if (dfXMultiplier == 0.0)
//                   dfXMultiplier = 1.0;
//                 if (dfYMultiplier == 0.0)
//                   dfYMultiplier = 1.0;
//             }
//             CSLDestroy(papszToken);
        }
        else if (EQUALN(pszLine,"COLUMNS",7))
        {
            papszToken = CSLTokenizeStringComplex(pszLine," ()\t",TRUE,FALSE); 
            bCoordSys = FALSE;
            bColumns = TRUE;
            if (CSLCount(papszToken) == 2)
            {
                nColumns = atoi(papszToken[1]);
                nAttribut = nColumns;

				if (m_paeFieldTypeMy == NULL){
					m_paeFieldTypeMy = new TABFieldType[nAttribut];
				}
            }
            else
            {
                bColumns = FALSE;
                nAttribut = 0;
            }
            CSLDestroy(papszToken);
        }
        else if (bColumns == TRUE && nColumns >0)
        {
            if (nColumns == 0)
            {
                // Permit to 0 columns
                bColumns = FALSE;
            }
            else if (AddFields(poFeaDfn, pszLine) == 0)
            {
                nColumns--;
                if (nColumns == 0)
                  bColumns = FALSE;
            }
            else
            {
                bColumns = FALSE;
            }
        }
        else if (bCoordSys == TRUE)
        {
//             pszTmp = pszCoordSys;
//             pszCoordSys = CPLStrdup(CPLSPrintf("%s %s",pszCoordSys,
//                                                  pszLine));
//             CPLFree(pszTmp);
            //printf("Reading CoordSys\n");
            // Reading CoordSys
        }

    }

	//paeFieldType = paeFieldTypeTemp;
    return 0;
}

/************************************************************************/
/*                             AddFields()                              */
/************************************************************************/

int  MIFFile::AddFields(const char *pszLine)
{
    char **papszToken;
    int nStatus = 0,numTok;

    CPLAssert(m_bHeaderWrote == FALSE);
    papszToken = CSLTokenizeStringComplex(pszLine," (,)\t",TRUE,FALSE); 
    numTok = CSLCount(papszToken);

    if (numTok >= 3 && EQUAL(papszToken[1], "char"))
    {
        /*-------------------------------------------------
         * CHAR type
         *------------------------------------------------*/
        nStatus = AddFieldNative(papszToken[0], TABFChar,
                                 atoi(papszToken[2]));
    }
    else if (numTok >= 2 && EQUAL(papszToken[1], "integer"))
    {
        /*-------------------------------------------------
         * INTEGER type
         *------------------------------------------------*/
        nStatus = AddFieldNative(papszToken[0], TABFInteger);
    }
    else if (numTok >= 2 && EQUAL(papszToken[1], "smallint"))
    {
        /*-------------------------------------------------
         * SMALLINT type
         *------------------------------------------------*/
        nStatus = AddFieldNative(papszToken[0], TABFSmallInt);
    }
    else if (numTok >= 4 && EQUAL(papszToken[1], "decimal"))
    {
        /*-------------------------------------------------
         * DECIMAL type
         *------------------------------------------------*/
        nStatus = AddFieldNative(papszToken[0], TABFDecimal,
                                 atoi(papszToken[2]), atoi(papszToken[3]));
    }
    else if (numTok >= 2 && EQUAL(papszToken[1], "float"))
    {
        /*-------------------------------------------------
         * FLOAT type
         *------------------------------------------------*/
        nStatus = AddFieldNative(papszToken[0], TABFFloat);
    }
    else if (numTok >= 2 && EQUAL(papszToken[1], "date"))
    {
        /*-------------------------------------------------
         * DATE type (returned as a string: "DD/MM/YYYY")
         *------------------------------------------------*/
        nStatus = AddFieldNative(papszToken[0], TABFDate);
    }
    else if (numTok >= 2 && EQUAL(papszToken[1], "logical"))
    {
        /*-------------------------------------------------
         * LOGICAL type (value "T" or "F")
         *------------------------------------------------*/
        nStatus = AddFieldNative(papszToken[0], TABFLogical);
    }
    else 
      nStatus = -1; // Unrecognized field type or line corrupt
    
    CSLDestroy(papszToken);
    papszToken = NULL;

    if (nStatus != 0)
    {
        CPLError(CE_Failure, CPLE_FileIO,
                 "Failed to parse field definition in file %s", m_pszFname);
        return -1;
    }
    
    return 0;
}

/************************************************************************/
/*                          增加一个字段信息                            */
/************************************************************************/
int	MIFFile::AddFields(OGRFeatureDefn* poFeaDfn, const char *pszLine)
{
	char **papszToken;
    int nStatus = 0,numTok;

    papszToken = CSLTokenizeStringComplex(pszLine," (,)\t",TRUE,FALSE); 
    numTok = CSLCount(papszToken);

    if (numTok >= 3 && EQUAL(papszToken[1], "char"))
    {
        /*-------------------------------------------------
         * CHAR type
         *------------------------------------------------*/
        nStatus = AddFieldNativeEx(poFeaDfn, papszToken[0], TABFChar,
                                 atoi(papszToken[2]));
    }
    else if (numTok >= 2 && EQUAL(papszToken[1], "integer"))
    {
        /*-------------------------------------------------
         * INTEGER type
         *------------------------------------------------*/
        nStatus = AddFieldNativeEx(poFeaDfn, papszToken[0], TABFInteger);
    }
    else if (numTok >= 2 && EQUAL(papszToken[1], "smallint"))
    {
        /*-------------------------------------------------
         * SMALLINT type
         *------------------------------------------------*/
        nStatus = AddFieldNativeEx(poFeaDfn, papszToken[0], TABFSmallInt);
    }
    else if (numTok >= 4 && EQUAL(papszToken[1], "decimal"))
    {
        /*-------------------------------------------------
         * DECIMAL type
         *------------------------------------------------*/
        nStatus = AddFieldNativeEx(poFeaDfn, papszToken[0], TABFDecimal,
                                 atoi(papszToken[2]), atoi(papszToken[3]));
    }
    else if (numTok >= 2 && EQUAL(papszToken[1], "float"))
    {
        /*-------------------------------------------------
         * FLOAT type
         *------------------------------------------------*/
        nStatus = AddFieldNativeEx(poFeaDfn, papszToken[0], TABFFloat);
    }
    else if (numTok >= 2 && EQUAL(papszToken[1], "date"))
    {
        /*-------------------------------------------------
         * DATE type (returned as a string: "DD/MM/YYYY")
         *------------------------------------------------*/
        nStatus = AddFieldNativeEx(poFeaDfn, papszToken[0], TABFDate);
    }
    else if (numTok >= 2 && EQUAL(papszToken[1], "logical"))
    {
        /*-------------------------------------------------
         * LOGICAL type (value "T" or "F")
         *------------------------------------------------*/
        nStatus = AddFieldNativeEx(poFeaDfn, papszToken[0], TABFLogical);
    }
    else 
      nStatus = -1; // Unrecognized field type or line corrupt
    
    CSLDestroy(papszToken);
    papszToken = NULL;

    if (nStatus != 0)
    {
        return -1;
    }
    
    return 0;
}

/************************************************************************/
/*                          GetFeatureCount()                           */
/************************************************************************/

int MIFFile::GetFeatureCount (int bForce)
{
    
    if( m_poFilterGeom != NULL || m_poAttrQuery != NULL )
        return OGRLayer::GetFeatureCount( bForce );
    else
    {
        if (bForce == TRUE)
            PreParseFile();

        if (m_bPreParsed)
            return m_nFeatureCount;
        else
            return -1;
    }
}

/************************************************************************/
/*                            ResetReading()                            */
/************************************************************************/

void MIFFile::ResetReading()

{   
    const char *pszLine;

    m_poMIFFile->Rewind();

    while ((pszLine = m_poMIFFile->GetLine()) != NULL)
      if (EQUALN(pszLine,"DATA",4))
        break;

    while ((pszLine = m_poMIFFile->GetLine()) != NULL)
    {
        if (m_poMIFFile->IsValidFeature(pszLine))
          break;
    }

    m_poMIDFile->Rewind();
    m_poMIDFile->GetLine();
    
    // We're positioned on first feature.  Feature Ids start at 1.
    if (m_poCurFeature)
    {
        delete m_poCurFeature;
        m_poCurFeature = NULL;
    }

    m_nCurFeatureId = 0;
    m_nPreloadedId = 1;
}

/************************************************************************/
/*                            PreParseFile()                            */
/************************************************************************/

void MIFFile::PreParseFile()
{
    char **papszToken = NULL;
    const char *pszLine;
    
    GBool bPLine = FALSE;
    GBool bText = FALSE;

    if (m_bPreParsed == TRUE)
      return;

    m_poMIFFile->Rewind();

    while ((pszLine = m_poMIFFile->GetLine()) != NULL)
      if (EQUALN(pszLine,"DATA",4))
        break;

    m_nPoints = m_nLines = m_nRegions = m_nTexts = 0;

    while ((pszLine = m_poMIFFile->GetLine()) != NULL)
    {
        if (m_poMIFFile->IsValidFeature(pszLine))
        {
            bPLine = FALSE;
            bText = FALSE;
            m_nFeatureCount++;
        }

        CSLDestroy(papszToken);
        papszToken = CSLTokenizeString(pszLine);

        if (EQUALN(pszLine,"POINT",5))
        {
            m_nPoints++;
            if (CSLCount(papszToken) == 3)
            {
                UpdateExtents(m_poMIFFile->GetXTrans(atof(papszToken[1])),
                             m_poMIFFile->GetYTrans(atof(papszToken[2])));
            }
              
        }
        else if (EQUALN(pszLine,"LINE",4) ||
                 EQUALN(pszLine,"RECT",4) ||
                 EQUALN(pszLine,"ROUNDRECT",9) ||
                 EQUALN(pszLine,"ARC",3) ||
                 EQUALN(pszLine,"ELLIPSE",7))
        {
            if (CSLCount(papszToken) == 5)
            {
                m_nLines++;
                UpdateExtents(m_poMIFFile->GetXTrans(atof(papszToken[1])), 
                             m_poMIFFile->GetYTrans(atof(papszToken[2])));
                UpdateExtents(m_poMIFFile->GetXTrans(atof(papszToken[3])), 
                             m_poMIFFile->GetYTrans(atof(papszToken[4])));
            }
        }
        else if (EQUALN(pszLine,"REGION",6) )
        {
            m_nRegions++;
            bPLine = TRUE;
        }
        else if( EQUALN(pszLine,"PLINE",5))
        {
            m_nLines++;
            bPLine = TRUE;
        }
        else if (EQUALN(pszLine,"TEXT",4)) 
        {
            m_nTexts++;
            bText = TRUE;
        }
        else if (bPLine == TRUE)
        {
            if (CSLCount(papszToken) == 2 &&
                strchr("-.0123456789", papszToken[0][0]) != NULL)
            {
                UpdateExtents( m_poMIFFile->GetXTrans(atof(papszToken[0])),
                              m_poMIFFile->GetYTrans(atof(papszToken[1])));
            }
        }
        else if (bText == TRUE)
        {
           if (CSLCount(papszToken) == 4 &&
                strchr("-.0123456789", papszToken[0][0]) != NULL)
            {
                UpdateExtents(m_poMIFFile->GetXTrans(atof(papszToken[0])),
                             m_poMIFFile->GetYTrans(atof(papszToken[1])));
                UpdateExtents(m_poMIFFile->GetXTrans(atof(papszToken[2])),
                             m_poMIFFile->GetYTrans(atof(papszToken[3])));
            } 
        }
        
      }

    CSLDestroy(papszToken);
    
    m_poMIFFile->Rewind();

    while ((pszLine = m_poMIFFile->GetLine()) != NULL)