Add a menu example making use of loader.4th(8) facilities.

Merge candidate, as it is just an example...

1 files changed, 110 insertions, 0 deletions

diff --git a/share/examples/bootforth/menuconf.4th b/share/examples/bootforth/menuconf.4th
new file mode 100644
index 0000000..ae053ec
--- /dev/null
+++ b/share/examples/bootforth/menuconf.4th
@@ -0,0 +1,110 @@
+\ Simple greeting screen, presenting basic options.
+\ XXX This is far too trivial - I don't have time now to think
+\ XXX about something more fancy... :-/
+\ $Id$
+
+: title
+	f_single
+	60 11 10 4 box
+	29 4 at-xy 15 fg 7 bg
+	." Welcome to BootFORTH!"
+	me
+;
+
+: menu
+	2 fg
+	20 7 at-xy 
+	." 1.  Start FreeBSD /boot/stable.conf."
+        20 8 at-xy
+        ." 2.  Start FreeBSD /boot/current.conf."
+	20 9 at-xy
+	." 3.  Start FreeBSD /boot/loader.rc."
+	20 10 at-xy
+	." 4.  Reboot."
+	me
+;
+
+: tkey	( d -- flag | char )
+	seconds +
+	begin 1 while
+	    dup seconds u< if
+		drop
+		-1
+		exit
+	    then
+	    key? if
+		drop
+		key
+		exit
+	    then
+	repeat
+;
+
+: prompt
+	14 fg
+	20 12 at-xy
+	." Enter your option (1,2,3,4): "
+	10 tkey
+	dup 32 = if
+	    drop key
+	then
+	dup 0< if
+	    drop 51
+	then
+	dup emit
+	me
+;
+
+: help_text
+        10 18 at-xy ." * Choose 1 or 2 to run special configuration file."
+	10 19 at-xy ." * Choose 3 to proceed with standard bootstrapping."
+	12 20 at-xy ." See '?' for available commands, and 'words' for"
+	12 21 at-xy ." complete list of Forth words."
+	10 22 at-xy ." * Choose 4 in order to warm boot your machine."
+;
+
+: (reboot) 0 reboot ;
+
+: main_menu
+	begin 1 while
+		clear
+		f_double
+		79 23 1 1 box
+		title
+		menu
+		help_text
+		prompt
+		cr cr cr
+		dup 49 = if
+			drop
+			1 25 at-xy cr
+			." Loading /boot/stable.conf. Please wait..." cr
+			s" /boot/stable.conf" read-conf
+			boot-conf
+		then
+		dup 50 = if
+			drop
+			1 25 at-xy cr
+			." Loading /boot/current.conf. Please wait..." cr
+			s" /boot/current.conf" read-conf
+			boot-conf
+		then
+		dup 51 = if
+			drop
+			1 25 at-xy cr
+			." Proceeding with standard boot. Please wait..." cr
+			boot-conf
+		then
+		dup 52 = if
+			drop
+			1 25 at-xy cr
+			['] (reboot) catch abort" Error rebooting"
+		then
+		20 12 at-xy
+		." Key " emit ."  is not a valid option!"
+		20 13 at-xy
+		." Press any key to continue..."
+		key drop
+	repeat
+;
+