lwcircstring_from_gserialized_buffer()

static LWCIRCSTRING* lwcircstring_from_gserialized_buffer ( uint8_t *  data_ptr, uint8_t  g_flags, size_t *  g_size  )

static

Definition at line 1401 of file g_serialized.c.

References LWCIRCSTRING::bbox, CIRCSTRINGTYPE, LWCIRCSTRING::flags, FLAGS_GET_M, FLAGS_GET_Z, FLAGS_NDIMS, gserialized_get_uint32_t(), lwalloc(), LWCIRCSTRING::points, ptarray_construct(), ptarray_construct_reference_data(), LWCIRCSTRING::srid, SRID_UNKNOWN, and LWCIRCSTRING::type.

Referenced by lwgeom_from_gserialized_buffer().

{
        uint8_t *start_ptr = data_ptr;
        LWCIRCSTRING *circstring;
        uint32_t npoints = 0;

        assert(data_ptr);

        circstring = (LWCIRCSTRING*)lwalloc(sizeof(LWCIRCSTRING));
        circstring->srid = SRID_UNKNOWN; /* Default */
        circstring->bbox = NULL;
        circstring->type = CIRCSTRINGTYPE;
        circstring->flags = g_flags;

        data_ptr += 4; /* Skip past the circstringtype. */
        npoints = gserialized_get_uint32_t(data_ptr); /* Zero => empty geometry */
        data_ptr += 4; /* Skip past the npoints. */

        if ( npoints > 0 )
                circstring->points = ptarray_construct_reference_data(FLAGS_GET_Z(g_flags), FLAGS_GET_M(g_flags), npoints, data_ptr);
        else
                circstring->points = ptarray_construct(FLAGS_GET_Z(g_flags), FLAGS_GET_M(g_flags), 0); /* Empty circularstring */

        data_ptr += FLAGS_NDIMS(g_flags) * npoints * sizeof(double);

        if ( g_size )
                *g_size = data_ptr - start_ptr;

        return circstring;
}

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