X-Git-Url: https://thelambdalab.xyz/gitweb/index.cgi?a=blobdiff_plain;f=src%2Flib_7_vocab.4th;fp=src%2Flib_8_vocab.4th;h=5f13b47e2355280fa3a1d0d1f679e54f30c12c6e;hb=90a9b8ad41a542c3ca7d150d4d1168cb8ec97b81;hp=e0ba306dfcfa4c2a50cbd7e7d8c82ad8350166d1;hpb=56f581c25775f4244cd60d5943a5beb46a9ccafb;p=forth.jl.git

diff --git a/src/lib_8_vocab.4th b/src/lib_7_vocab.4th
similarity index 59%
rename from src/lib_8_vocab.4th
rename to src/lib_7_vocab.4th
index e0ba306..5f13b47 100644
--- a/src/lib_8_vocab.4th
+++ b/src/lib_7_vocab.4th
@@ -13,11 +13,41 @@
         DUP @ LATEST !      ( set LATEST to point to the previous word )
 ;
 
-: HIDE
+\ Mark word as hidden
+: HIDE ( -- )
         BL WORD FIND DROP >NAME
         DUP @ F_HIDDEN OR SWAP !
 ;
 
+: ?HIDDEN
+        1+              ( skip over the link pointer )
+        @               ( get the flags/length byte )
+        F_HIDDEN AND    ( mask the F_HIDDEN flag and return it (as a truth value) )
+;
+
+\ Display name of word
+: .NAME ( cfa -- )
+        DUP @           ( get the flags/length byte )
+        F_LENMASK AND   ( mask out the flags - just want the length )
+
+        BEGIN
+                DUP 0>          ( length > 0? )
+        WHILE
+                SWAP 1+         ( addr len -- len addr+1 )
+                DUP @           ( len addr -- len addr char | get the next character)
+                DUP 32 >= OVER 127 <= AND IF
+                        EMIT    ( len addr char -- len addr | and print it)
+                ELSE
+                        BASE @ SWAP HEX
+                        ." \x" 0 .R
+                        BASE !
+                THEN
+                SWAP 1-         ( len addr -- addr len-1    | subtract one from length )
+        REPEAT
+        2DROP           ( len addr -- )
+;
+
+
 \ Create new vocabulary
 : VOCABULARY
         create 0 ,
@@ -40,7 +70,11 @@ vocabulary ROOT
 ;
 
 : PREVIOUS
-        1 #context -!
+        #context @ 1 > if
+                1 #context -!
+        else
+                CR ." Cannot empty search order stack!"
+        then
 ;
 
 : ALSO