Function concat

methods/svec/src/pg_gp/SparseData.c:1671–1708

* @param left The SparseData that comes first in the resulting concatenation * @param right The SparseData that comes second in the resulting concatenation * @return The concatenation of two input SparseData. */

 * @return The concatenation of two input SparseData.
 */
SparseData concat(SparseData left, SparseData right) {
	if (left == NULL && right == NULL) {
		return NULL;
	} else if (left == NULL && right != NULL) {
		return makeSparseDataCopy(right);
	} else if (left != NULL && right == NULL) {
		return makeSparseDataCopy(left);
	}
	SparseData sdata = makeEmptySparseData();
	char *vals,*index;
	int l_val_len = left->vals->len;
	int r_val_len = right->vals->len;
	int l_ind_len = left->index->len;
	int r_ind_len = right->index->len;
	int val_len = l_val_len + r_val_len;
	int ind_len = l_ind_len + r_ind_len;

	vals = (char *)palloc(sizeof(char)*val_len + 1);
	index = (char *)palloc(sizeof(char)*ind_len + 1);

	memcpy(vals, left->vals->data,l_val_len);
	memcpy(vals+l_val_len,right->vals->data,r_val_len);
	vals[val_len] = '\0';

	memcpy(index, left->index->data,l_ind_len);
	memcpy(index+l_ind_len,right->index->data,r_ind_len);
	index[ind_len] = '\0';

	sdata->vals  = makeStringInfoFromData(vals,val_len);
	sdata->index = makeStringInfoFromData(index,ind_len);

	sdata->type_of_data = left->type_of_data;
	sdata->unique_value_count = left->unique_value_count +
		                    right->unique_value_count;
	sdata->total_value_count  = left->total_value_count +
		                    right->total_value_count;
	return sdata;
}

/**
 * @param rep The SparseData to be replicated