lwcircstring_from_gserialized1_buffer()

static LWCIRCSTRING * lwcircstring_from_gserialized1_buffer ( uint8_t *  data_ptr, lwflags_t  lwflags, size_t *  size  )

static

Definition at line 1314 of file gserialized1.c.

{
        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 = lwflags;
 
        data_ptr += 4; /* Skip past the circstringtype. */
        npoints = gserialized1_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(lwflags), FLAGS_GET_M(lwflags), npoints, data_ptr);
        else
                circstring->points = ptarray_construct(FLAGS_GET_Z(lwflags), FLAGS_GET_M(lwflags), 0); /* Empty circularstring */
 
        data_ptr += FLAGS_NDIMS(lwflags) * npoints * sizeof(double);
 
        if ( size )
                *size = data_ptr - start_ptr;
 
        return circstring;
}

References LWCIRCSTRING::bbox, CIRCSTRINGTYPE, LWCIRCSTRING::flags, FLAGS_GET_M, FLAGS_GET_Z, FLAGS_NDIMS, gserialized1_get_uint32_t(), lwalloc(), lwflags(), LWCIRCSTRING::points, ptarray_construct(), ptarray_construct_reference_data(), LWCIRCSTRING::srid, SRID_UNKNOWN, and LWCIRCSTRING::type.

Referenced by lwgeom_from_gserialized1_buffer().

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