gserialized1_is_empty()

int gserialized1_is_empty

(

const GSERIALIZED *

g

)

Check if a GSERIALIZED is empty without deserializing first.

Only checks if the number of elements of the parent geometry is zero, will not catch collections of empty, eg: GEOMETRYCOLLECTION(POINT EMPTY)

Definition at line 203 of file gserialized1.c.

{
        uint8_t *p = (uint8_t*)g;
        int isempty = 0;
        assert(g);
 
        p += 8; /* Skip varhdr and srid/flags */
        if(gserialized1_has_bbox(g))
                p += gserialized1_box_size(g); /* Skip the box */
 
        gserialized1_is_empty_recurse(p, &isempty);
        return isempty;
}

References gserialized1_box_size(), gserialized1_has_bbox(), and gserialized1_is_empty_recurse().

Referenced by gserialized_is_empty(), and test_gserialized1_is_empty().

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