LWGEOM_GEOS_makeValidCollection()

static GEOSGeometry* LWGEOM_GEOS_makeValidCollection ( const GEOSGeometry *  gin )

static

Definition at line 796 of file liblwgeom/lwgeom_geos_clean.c.

References lwalloc(), lwerror(), lwfree(), lwgeom_geos_errmsg, and LWGEOM_GEOS_makeValid().

Referenced by LWGEOM_GEOS_makeValid().

{
        int nvgeoms;
        GEOSGeometry **vgeoms;
        GEOSGeom gout;
        unsigned int i;

        nvgeoms = GEOSGetNumGeometries(gin);
        if ( nvgeoms == -1 ) {
                lwerror("GEOSGetNumGeometries: %s", lwgeom_geos_errmsg);
                return 0;
        }

        vgeoms = lwalloc( sizeof(GEOSGeometry*) * nvgeoms );
        if ( ! vgeoms ) {
                lwerror("LWGEOM_GEOS_makeValidCollection: out of memory");
                return 0;
        }

        for ( i=0; i<nvgeoms; ++i ) {
                vgeoms[i] = LWGEOM_GEOS_makeValid( GEOSGetGeometryN(gin, i) );
                if ( ! vgeoms[i] ) {
                        while (i--) GEOSGeom_destroy(vgeoms[i]);
                        lwfree(vgeoms);
                        /* we expect lwerror being called already by makeValid */
                        return NULL;
                }
        }

        /* Collect areas and lines (if any line) */
        gout = GEOSGeom_createCollection(GEOS_GEOMETRYCOLLECTION, vgeoms, nvgeoms);
        if ( ! gout )   /* an exception again */
        {
                /* cleanup and throw */
                for ( i=0; i<nvgeoms; ++i ) GEOSGeom_destroy(vgeoms[i]);
                lwfree(vgeoms);
                lwerror("GEOSGeom_createCollection() threw an error: %s",
                         lwgeom_geos_errmsg);
                return NULL;
        }
        lwfree(vgeoms);

        return gout;

}

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