+/*
+PSPP - a program for statistical analysis.
+Copyright (C) 2017 Free Software Foundation, Inc.
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
#ifndef ALGORITHM_H
#define ALGORITHM_H 1
bool is_heap (const void *array, size_t count, size_t size,
algo_compare_func *compare, const void *aux);
+/* Reverses the order of ARRAY, which contains COUNT elements of SIZE bytes
+ each. */
+void reverse_array (void *array, size_t count, size_t size);
#endif /* algorithm.h */