lwgeom_from_gml()

static LWGEOM * lwgeom_from_gml ( const char *  wkt, int  xml_size  )

static

Read GML.

Definition at line 1857 of file lwgeom_in_gml.c.

{
        xmlDocPtr xmldoc;
        xmlNodePtr xmlroot=NULL;
        LWGEOM *lwgeom = NULL;
        bool hasz=true;
        int root_srid=SRID_UNKNOWN;
 
        /* Begin to Parse XML doc */
        xmlInitParser();
 
        xmldoc = xmlReadMemory(xml, xml_size, NULL, NULL, XML_PARSE_SAX1);
        if (!xmldoc)
        {
                xmlCleanupParser();
                gml_lwpgerror("invalid GML representation", 1);
                return NULL;
        }
 
        xmlroot = xmlDocGetRootElement(xmldoc);
        if (!xmlroot)
        {
                xmlFreeDoc(xmldoc);
                xmlCleanupParser();
                gml_lwpgerror("invalid GML representation", 1);
                return NULL;
        }
 
        lwgeom = parse_gml(xmlroot, &hasz, &root_srid);
 
        xmlFreeDoc(xmldoc);
        xmlCleanupParser();
        /* shouldn't we be releasing xmldoc too here ? */
 
        if ( root_srid != SRID_UNKNOWN )
                lwgeom->srid = root_srid;
 
        /* GML geometries could be either 2 or 3D and can be nested mixed.
         * Missing Z dimension is even tolerated inside some GML coords
         *
         * So we deal with 3D in all structures allocation, and flag hasz
         * to false if we met once a missing Z dimension
         * In this case, we force recursive 2D.
         */
        if (!hasz)
        {
                LWGEOM *tmp = lwgeom_force_2d(lwgeom);
                lwgeom_free(lwgeom);
                lwgeom = tmp;
        }
 
        return lwgeom;
}

References gml_lwpgerror(), lwgeom_force_2d(), lwgeom_free(), parse_gml(), LWGEOM::srid, and SRID_UNKNOWN.

Referenced by geom_from_gml().

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