--- /dev/null
+/*
+ * Declarations for the "cdecl99" utility sources.
+ * Copyright © 2021 Nick Bowler
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef CDECL99_H_
+#define CDECL99_H_
+
+#include <gettext.h>
+#define _(x) gettext(x)
+
+void print_block(const char *s, int i, int w);
+int run_command(const char *line, int interactive);
+int run_command_simplify(const char *arg);
+int run_command_explain(const char *arg);
+int run_command_declare(const char *cmdarg);
+
+#endif