add licensing to source files

1 files changed, 16 insertions, 0 deletions

diff --git a/main.c b/main.c
index 9b237e4..2e903ae 100644
--- a/main.c
+++ b/main.c
@@ -1,3 +1,19 @@
+// foci - minimal forth implementation
+// Copyright (C) 2025  Clyne Sullivan <clyne@bitgloo.com>
+//
+// 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/>.
+
 #include "foci.h"
 
 #include <ctype.h>