C++ (Cpp) OGRGeometryCollection::importFromWktInternal Examples

Example #1

File: ogrgeometrycollection.cpp Project: ksshannon/gdal

OGRErr OGRGeometryCollection::importFromWktInternal( const char ** ppszInput,
                                                     int nRecLevel )

{
    // Arbitrary value, but certainly large enough for reasonable usages.
    if( nRecLevel == 32 )
    {
        CPLError( CE_Failure, CPLE_AppDefined,
                  "Too many recursion levels (%d) while parsing WKT geometry.",
                  nRecLevel );
        return OGRERR_CORRUPT_DATA;
    }

    int bHasZ = FALSE;
    int bHasM = FALSE;
    bool bIsEmpty = false;
    OGRErr eErr = importPreambleFromWkt(ppszInput, &bHasZ, &bHasM, &bIsEmpty);
    if( eErr != OGRERR_NONE )
        return eErr;
    if( bHasZ ) flags |= OGR_G_3D;
    if( bHasM ) flags |= OGR_G_MEASURED;
    if( bIsEmpty )
        return OGRERR_NONE;

    char szToken[OGR_WKT_TOKEN_MAX] = {};
    const char *pszInput = *ppszInput;

    // Skip first '('.
    pszInput = OGRWktReadToken( pszInput, szToken );

/* ==================================================================== */
/*      Read each subgeometry in turn.                                  */
/* ==================================================================== */
    do
    {
        OGRGeometry *poGeom = nullptr;

    /* -------------------------------------------------------------------- */
    /*      Get the first token, which should be the geometry type.         */
    /* -------------------------------------------------------------------- */
        OGRWktReadToken( pszInput, szToken );

    /* -------------------------------------------------------------------- */
    /*      Do the import.                                                  */
    /* -------------------------------------------------------------------- */
        if( STARTS_WITH_CI(szToken, "GEOMETRYCOLLECTION") )
        {
            OGRGeometryCollection* poGC = new OGRGeometryCollection();
            poGeom = poGC;
            eErr = poGC->importFromWktInternal( &pszInput,
                                               nRecLevel + 1 );
        }
        else
            eErr = OGRGeometryFactory::createFromWkt( &pszInput,
                                                       nullptr, &poGeom );

        if( eErr == OGRERR_NONE )
        {
            // If this has M, but not Z, it is an error if poGeom does
            // not have M.
            if( !Is3D() && IsMeasured() && !poGeom->IsMeasured() )
                eErr = OGRERR_CORRUPT_DATA;
            else
                eErr = addGeometryDirectly( poGeom );
        }
        if( eErr != OGRERR_NONE )
        {
            delete poGeom;
            return eErr;
        }

/* -------------------------------------------------------------------- */
/*      Read the delimiter following the ring.                          */
/* -------------------------------------------------------------------- */

        pszInput = OGRWktReadToken( pszInput, szToken );
    } while( szToken[0] == ',' );

/* -------------------------------------------------------------------- */
/*      freak if we don't get a closing bracket.                        */
/* -------------------------------------------------------------------- */
    if( szToken[0] != ')' )
        return OGRERR_CORRUPT_DATA;

    *ppszInput = pszInput;

    return OGRERR_NONE;
}