gserialized_spgist_compress_2d()

PGDLLEXPORT Datum gserialized_spgist_compress_2d

(

PG_FUNCTION_ARGS

)

Definition at line 663 of file gserialized_spgist_2d.c.

{
        Datum gsdatum = PG_GETARG_DATUM(0);
        BOX2DF *bbox_out = palloc(sizeof(BOX2DF));
        int result = LW_SUCCESS;
 
        POSTGIS_DEBUG(4, "[SPGIST] 'compress' function called");
 
        /* Extract the index key from the argument. */
        result = gserialized_datum_get_box2df_p(gsdatum, bbox_out);
 
        /* Is the bounding box valid (non-empty, non-infinite)? If not, return input uncompressed. */
        if (result == LW_FAILURE)
        {
                box2df_set_empty(bbox_out);
 
                POSTGIS_DEBUG(4, "[SPGIST] empty geometry!");
                PG_RETURN_POINTER(bbox_out);
        }
 
        /* Check all the dimensions for finite values */
        if ((!isfinite(bbox_out->xmax) || !isfinite(bbox_out->xmin)) ||
            (!isfinite(bbox_out->ymax) || !isfinite(bbox_out->ymin)))
        {
                box2df_set_finite(bbox_out);
 
                POSTGIS_DEBUG(4, "[SPGIST] infinite geometry!");
                PG_RETURN_POINTER(bbox_out);
        }
 
        /* Ensure bounding box has minimums below maximums. */
        box2df_validate(bbox_out);
 
        /* Return BOX2DF. */
        POSTGIS_DEBUG(4, "[SPGIST] 'compress' function complete");
        PG_RETURN_POINTER(bbox_out);
}

References box2df_set_empty(), box2df_set_finite(), box2df_validate(), gserialized_datum_get_box2df_p(), LW_FAILURE, and LW_SUCCESS.

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