ciface.fs: implement optional (exit) hook when returning control back to the interpreter

This allows us to optionally intercept and execute code before returning back
to the Forth interactive console.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

git-svn-id: svn://coreboot.org/openbios/trunk/openbios-devel@1383 f158a5a8-5612-0410-a976-696ce0be7e32

1 files changed, 8 insertions, 0 deletions

diff --git a/forth/system/ciface.fs b/forth/system/ciface.fs
index fd6c54e..85a6076 100644
--- a/forth/system/ciface.fs
+++ b/forth/system/ciface.fs
@@ -326,6 +326,14 @@ external
 
 : exit ( -- )
   ." EXIT"
+  
+  \ Execute (exit) hook if one exists
+  s" (exit)" $find if
+    execute
+  else
+    2drop
+  then
+  
   outer-interpreter
 ;