Function sdata_from_svec

gpcontrib/gp_sparse_vector/sparse_vector.h:82–97

* This routine supplies a pointer to a SparseData derived from an SvecType. * The SvecType is a serialized structure with fixed memory allocations, so * care must be taken not to append to the embedded StringInfo structs * without re-serializing the SparseData into the SvecType. */

 * without re-serializing the SparseData into the SvecType.
 */
static inline SparseData sdata_from_svec(SvecType *svec)
{
	char *sdataptr   = SVEC_SDATAPTR(svec);
	SparseData sdata = (SparseData)sdataptr;
	sdata->vals  = (StringInfo)SDATA_DATA_SINFO(sdataptr);
	sdata->index = (StringInfo)SDATA_INDEX_SINFO(sdataptr);
	sdata->vals->data   = SVEC_VALS_PTR(svec);
	if (sdata->index->maxlen == 0)
	{
		sdata->index->data = NULL;
	} else
	{
		sdata->index->data  = SVEC_INDEX_PTR(svec);
	}
	return(sdata);
}

char *svec_out_internal(SvecType *svec);
SvecType *svec_from_sparsedata(SparseData sdata,bool trim);