ptarray_merge()

POINTARRAY* ptarray_merge	(	POINTARRAY *	pa1,
		POINTARRAY *	pa2
	)

Merge two given POINTARRAY and returns a pointer on the new aggregate one.

Warning: this function free the two inputs POINTARRAY

Returns

POINTARRAY is newly allocated

Definition at line 616 of file ptarray.c.

{
        POINTARRAY *pa;
        size_t ptsize = ptarray_point_size(pa1);
 
        if (FLAGS_GET_ZM(pa1->flags) != FLAGS_GET_ZM(pa2->flags))
                lwerror("ptarray_cat: Mixed dimension");
 
        pa = ptarray_construct( FLAGS_GET_Z(pa1->flags),
                                FLAGS_GET_M(pa1->flags),
                                pa1->npoints + pa2->npoints);
 
        memcpy(         getPoint_internal(pa, 0),
                        getPoint_internal(pa1, 0),
                        ptsize*(pa1->npoints));
 
        memcpy(         getPoint_internal(pa, pa1->npoints),
                        getPoint_internal(pa2, 0),
                        ptsize*(pa2->npoints));
 
        ptarray_free(pa1);
        ptarray_free(pa2);
 
        return pa;
}

References POINTARRAY::flags, FLAGS_GET_M, FLAGS_GET_Z, FLAGS_GET_ZM, getPoint_internal(), lwerror(), POINTARRAY::npoints, ptarray_construct(), ptarray_free(), and ptarray_point_size().

Referenced by parse_gml_data().

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