Function tdigest_copy

pg_documentdb/src/aggregation/bson_tdigest.c:1047–1073

static tdigest_aggstate_t *
tdigest_copy(tdigest_aggstate_t *state)
{
	tdigest_aggstate_t *copy;

	copy = tdigest_aggstate_allocate(state->npercentiles, state->nvalues,
									 state->compression);

	memcpy(copy, state, offsetof(tdigest_aggstate_t, percentiles));

	if (state->nvalues > 0)
	{
		memcpy(copy->values, state->values,
			   sizeof(double) * state->nvalues);
	}

	if (state->npercentiles > 0)
	{
		memcpy(copy->percentiles, state->percentiles,
			   sizeof(double) * state->npercentiles);
	}

	memcpy(copy->centroids, state->centroids,
		   state->ncentroids * sizeof(centroid_t));

	return copy;
}


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