gbox_to_gml3()

static char* gbox_to_gml3 ( const GBOX *  bbox, const char *  srs, int  precision, int  opts, const char *  prefix  )

static

Definition at line 130 of file lwout_gml.c.

References GBOX::flags, FLAGS_GET_Z, IS_DIMS, LW_TRUE, lwalloc(), pointArray_GMLsize(), pointArray_toGML3(), ptarray_append_point(), ptarray_construct_empty(), ptarray_free(), ptarray_remove_point(), POINT4D::x, GBOX::xmax, GBOX::xmin, POINT4D::y, GBOX::ymax, GBOX::ymin, POINT4D::z, GBOX::zmax, and GBOX::zmin.

Referenced by lwgeom_extent_to_gml3().

{
        int size;
        POINT4D pt;
        POINTARRAY *pa;
        char *ptr, *output;
        size_t prefixlen = strlen(prefix);
        int dimension = 2;

        if ( ! bbox )
        {
                size = ( sizeof("<Envelope>/") + (prefixlen*2) ) * 2;
                if ( srs ) size += strlen(srs) + sizeof(" srsName=..");

                ptr = output = lwalloc(size);

                ptr += sprintf(ptr, "<%sEnvelope", prefix);
                if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);

                ptr += sprintf(ptr, "/>");

                return output;
        }

        if (FLAGS_GET_Z(bbox->flags)) dimension = 3;

        pa = ptarray_construct_empty(FLAGS_GET_Z(bbox->flags), 0, 1);

        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);

        size = pointArray_GMLsize(pa, precision) * 2;
        size += ( sizeof("<Envelope><lowerCorner><upperCorner>//") + (prefixlen*3) ) * 2;
        if ( srs ) size += strlen(srs) + sizeof(" srsName=..");
        if ( IS_DIMS(opts) ) size += sizeof(" srsDimension=. .");

        ptr = output = lwalloc(size);

        ptr += sprintf(ptr, "<%sEnvelope", prefix);
        if ( srs ) ptr += sprintf(ptr, " srsName=\"%s\"", srs);
        if ( IS_DIMS(opts) ) ptr += sprintf(ptr, " srsDimension=\"%d\"", dimension);
        ptr += sprintf(ptr, ">");

        ptr += sprintf(ptr, "<%slowerCorner>", prefix);
        ptr += pointArray_toGML3(pa, ptr, precision, opts);
        ptr += sprintf(ptr, "</%slowerCorner>", prefix);

        ptarray_remove_point(pa, 0);
        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);

        ptr += sprintf(ptr, "<%supperCorner>", prefix);
        ptr += pointArray_toGML3(pa, ptr, precision, opts);
        ptr += sprintf(ptr, "</%supperCorner>", prefix);

        ptr += sprintf(ptr, "</%sEnvelope>", prefix);

        ptarray_free(pa);

        return output;
}

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