move the full listener from interface/retro-unix to the basic image

FossilOrigin-Name: e6fd949a0911730c0db46faf3c20fdb7b265b38bc2b3b3456980d26a4bb1bdbc

RELEASE-NOTES

@@ -46,6 +46,9 @@
     the device handlers
   - support loading extensions at runtime via `library:load`
     (searches ./library/ and ~/.config/retroforth/library/)
+  - more use of assembly language
+  - move full listener from interface/retro-unix to the base
+    image
 
 - library
   - block-editor (from konilo)

image/retro.forth

@@ -1872,33 +1872,52 @@ provide much more than I can do here.
 
 ## Listener
 
+The basic image has a space allocated for input at the end of
+the kernel. A pointer to this is stored at address 7.
+
+~~~
+:TIB #7 fetch ;
+~~~
+
+~~~
+[ 'ERROR:_Word_Not_Found:_ s:put TIB s:put nl ]
+&err:notfound set-hook
+~~~
+
 If a VM implementation provides both the character output and a
 generic "keyboard" input, the basic listener here can be used.
 
 ~~~
+:c:get (-c) hook #1 io:scan-for io:invoke ;
+:bye (-) \ha...... ;
+FALSE 'Ignoring var-n
 {{
-  :eol? (c-f)
-    [ ASCII:CR eq? ] [ ASCII:LF eq? ] [ ASCII:SPACE eq? ] tri or or ;
-
-  :valid? (s-sf)
-    dup s:length n:-zero? ;
-
-  :bs? (c-cf)
-    dup [ #8 eq? ] [ #127 eq? ] bi or ;
-
-  :check-bs (c-c)
-    bs? [ buffer:size #2 gteq? [ buffer:get drop ] if buffer:get drop ] if ;
+  'EOT var
+  (-nn)  :version    @Version #100 /mod ;
+  (c-f)  :done?      dup !EOT
+                     [ ASCII:CR eq? ]
+                     [ ASCII:LF eq? ]
+                     [ ASCII:SPACE eq? ] tri or or ;
+  (c-f)  :eol?       @EOT [ ASCII:CR eq? ] [ ASCII:LF eq? ] bi or ;
+  (s-sf) :valid?     dup s:length n:strictly-positive? ;
+  (c-c)  :check-eof  dup [ #-1 eq? ] [ ASCII:EOT eq? ] bi or &bye if ;
+         :bs         buffer:size #2 gteq?
+                     [ buffer:get drop ] if buffer:get drop ;
+  (c-c)  :check-bs   dup [ ASCII:BS eq? ] [ ASCII:DEL eq? ] bi or &bs if ;
+  (c-c)  :check      check-eof check-bs ;
+  (-c)   :character  c:get dup buffer:add ;
+  (q-)   :buffer     [ TIB buffer:set call buffer:start ] buffer:preserve ;
+  (-s)   :read-token [ [ character check done? ] until ] buffer s:chop ;
+  (-sf)  :input      read-token valid? ;
+  (sf-)  :process    @Ignoring [ drop-pair eol? [ &Ignoring v:off ] if ] if;
+                     &interpret &drop choose ;
 ---reveal---
-  :c:get (-c) hook #1 io:scan-for io:invoke ;
-
   :s:get-word (-s) [ #7 fetch buffer:set
                      [ c:get dup buffer:add check-bs eol? ] until
                        buffer:start s:chop ] buffer:preserve ;
-
-  :bye (-) \ha...... ;
-
-  :listen (-)
-    repeat s:get-word valid? &interpret &drop choose again ;
+  :banner  version 'RETRO_12_(%n.%n)\n s:format s:put
+           FREE EOM FREE - EOM '%n_Max,_%n_Used,_%n_Free\n s:format s:put ;
+  :listen  banner repeat input process again ;
 }}
 
 &listen #1 store

interface/retro-unix.retro

@@ -3,13 +3,6 @@
 In this file I am implementing the interactive listener that
 RETRO will run when started with `-i`, `-i,c`, or `-i,fs`.
 
-The basic image has a space allocated for input at the end of
-the kernel. A pointer to this is stored at address 7.
-
-~~~
-:TIB #7 fetch ;
-~~~
-
 ~~~
 :image:save (s-) #1000 io:scan-for io:invoke ;
 ~~~
@@ -55,53 +48,17 @@ RRE's C part will access a couple parts of this, based on the
 startup flags passed.
 
 ~~~
-{{
-  'EOT var
-  FALSE 'Ignoring var-n
-  (-nn)  :version    @Version #100 /mod ;
-  (c-f)  :done?      dup !EOT
-                     [ ASCII:CR eq? ]
-                     [ ASCII:LF eq? ]
-                     [ ASCII:SPACE eq? ] tri or or ;
-  (c-f)  :eol?       @EOT [ ASCII:CR eq? ] [ ASCII:LF eq? ] bi or ;
-  (s-sf) :valid?     dup s:length n:strictly-positive? ;
-  (c-c)  :check-eof  dup [ #-1 eq? ] [ ASCII:EOT eq? ] bi or &bye if ;
-         :bs         buffer:size #2 gteq?
-                     [ buffer:get drop ] if buffer:get drop ;
-  (c-c)  :check-bs   dup [ ASCII:BS eq? ] [ ASCII:DEL eq? ] bi or &bs if ;
-  (c-c)  :check      check-eof check-bs ;
-  (-c)   :character  c:get dup buffer:add ;
-  (q-)   :buffer     [ TIB buffer:set call buffer:start ] buffer:preserve ;
-  (-s)   :read-token [ [ character check done? ] until ] buffer s:chop ;
-  (-sf)  :input      read-token valid? ;
-  (sf-)  :process    @Ignoring [ drop-pair eol? [ &Ignoring v:off ] if ] if;
-                     &interpret &drop choose ;
----reveal---
-  ://    script:ignore-to-eol &Ignoring v:on ; immediate
-  :banner  version 'RETRO_12_(%n.%n)\n s:format s:put
-           FREE EOM FREE - EOM '%n_Max,_%n_Used,_%n_Free\n s:format s:put ;
-  :listen  banner repeat input process again ;
-}}
-
-&listen #1 store
-~~~
-
-~~~
-[ 'ERROR:_Word_Not_Found:_ s:put TIB s:put nl ]
-&err:notfound set-hook
+://    script:ignore-to-eol &Ignoring v:on ; immediate
 ~~~
 
 ## d:source
 
 ~~~
 'interface/retro-unix.retro s:keep
-dup 'listen d:lookup d:source store
-dup 'banner d:lookup d:source store
 dup '// d:lookup d:source store
 dup 'clear d:lookup d:source store
 dup 's:get d:lookup d:source store
 dup 'parse-until d:lookup d:source store
 dup 'image:save d:lookup d:source store
-dup 'TIB d:lookup d:source store
 drop
 ~~~