gbox_to_gml2()

static lwvarlena_t* gbox_to_gml2 ( const GBOX *  bbox, const char *  srs, int  precision, const char *  prefix  )

static

Definition at line 109 of file lwout_gml.c.

{
        int size;
        POINT4D pt;
        POINTARRAY *pa;
        char *ptr, *output;
        size_t prefixlen = strlen(prefix);
 
        if ( ! bbox )
        {
                size = ( sizeof("<Box>/") + (prefixlen*2) ) * 2;
                if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
 
                lwvarlena_t *v = lwalloc(size + LWVARHDRSZ);
                ptr = output = v->data;
 
                ptr += sprintf(ptr, "<%sBox", prefix);
 
                if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
 
                ptr += sprintf(ptr, "/>");
 
                LWSIZE_SET(v->size, ptr - output + LWVARHDRSZ);
 
                return v;
        }
 
        pa = ptarray_construct_empty(FLAGS_GET_Z(bbox->flags), 0, 2);
 
        pt.x = bbox->xmin;
        pt.y = bbox->ymin;
        if (FLAGS_GET_Z(bbox->flags)) pt.z = bbox->zmin;
        ptarray_append_point(pa, &pt, LW_TRUE);
 
        pt.x = bbox->xmax;
        pt.y = bbox->ymax;
        if (FLAGS_GET_Z(bbox->flags)) pt.z = bbox->zmax;
        ptarray_append_point(pa, &pt, LW_TRUE);
 
        size = pointArray_GMLsize(pa, precision);
        size += ( sizeof("<Box><coordinates>/") + (prefixlen*2) ) * 2;
        if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
 
        lwvarlena_t *v = lwalloc(size + LWVARHDRSZ);
        ptr = output = v->data;
 
        if ( srs ) ptr += sprintf(ptr, "<%sBox srsName=\"%s\">", prefix, srs);
        else       ptr += sprintf(ptr, "<%sBox>", prefix);
 
        ptr += sprintf(ptr, "<%scoordinates>", prefix);
        ptr += pointArray_toGML2(pa, ptr, precision);
        ptr += sprintf(ptr, "</%scoordinates></%sBox>", prefix, prefix);
 
        ptarray_free(pa);
        LWSIZE_SET(v->size, ptr - output + LWVARHDRSZ);
 
        return v;
}

References lwvarlena_t::data, GBOX::flags, FLAGS_GET_Z, LW_TRUE, lwalloc(), LWSIZE_SET, LWVARHDRSZ, pointArray_GMLsize(), pointArray_toGML2(), precision, ptarray_append_point(), ptarray_construct_empty(), ptarray_free(), lwvarlena_t::size, POINT4D::x, GBOX::xmax, GBOX::xmin, POINT4D::y, GBOX::ymax, GBOX::ymin, POINT4D::z, GBOX::zmax, and GBOX::zmin.

Referenced by lwgeom_extent_to_gml2().

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