Implemented \ comments as a word, implemented [CHAR]

[forth.jl.git] / src / forth.jl

diff --git a/src/forth.jl b/src/forth.jl
index a52b675..b1d782c 100644 (file)
--- a/src/forth.jl
+++ b/src/forth.jl
@@ -1,12 +1,12 @@
 module forth
 
 # VM mem size
-size_mem = 640*1024
+size_mem = 1000000 # 1 mega-int
 
 # Buffer sizes
-size_RS = 1024   # Return stack size
-size_PS = 1024   # Parameter stack size
-size_TIB = 1096  # Terminal input buffer size
+size_RS = 1000   # Return stack size
+size_PS = 1000   # Parameter stack size
+size_TIB = 1000  # Terminal input buffer size
 
 # The mem array constitutes the memory of the VM. It has the following geography:
 #
@@ -231,13 +231,12 @@ defConst("DOCON", DOCON)
 defConst("DOVAR", DOVAR)
 
 defConst("DICT", DICT)
+defConst("MEMSIZE", size_mem)
 
 F_IMMED = defConst("F_IMMED", 128)
 F_HIDDEN = defConst("F_HIDDEN", 256)
 F_LENMASK = defConst("F_LENMASK", 127)
 
-
-
 # Basic forth primitives
 
 DROP = defPrimWord("DROP", () -> begin
@@ -627,24 +626,10 @@ WORD = defPrimWord("WORD", () -> begin
     eof_char = Char(EOF)
     c = eof_char
 
-    skip_to_end = false
     while true
-
         callPrim(mem[KEY])
         c = Char(popPS())
 
-        if c == '\\'
-            skip_to_end = true
-            continue
-        end
-
-        if skip_to_end
-            if c == '\n' || c == eof_char
-                skip_to_end = false
-            end
-            continue
-        end
-
         if c == ' ' || c == '\t'
             continue
         end
@@ -769,6 +754,8 @@ end)
 
 # Compilation
 
+STATE, STATE_CFA = defNewVar("STATE", 0)
+
 HEADER = defPrimWord("HEADER", () -> begin
 
     wordLen = popPS()
@@ -787,8 +774,6 @@ COMMA = defPrimWord(",", () -> begin
     return NEXT
 end)
 
-STATE, STATE_CFA = defNewVar("STATE", 0)
-
 LBRAC = defPrimWord("[", () -> begin
     mem[STATE] = 0
     return NEXT
@@ -837,6 +822,28 @@ TICK = defWord("'",
 BTICK = defWord("[']",
     [FROMR, DUP, INCR, TOR, FETCH, EXIT])
 
+# CREATE and DOES>
+
+CREATE = defWord("CREATE",
+    [WORD,
+    HEADER,
+    LIT, DOVAR, COMMA, EXIT]);
+
+DODOES = defPrim(() -> begin
+    pushRS(reg.IP)
+    reg.IP = reg.W + 1
+    return NEXT
+end, name="DOCOL")
+
+defConst("DODOES", DODOES)
+
+FROMDOES_PAREN = defWord("(DOES>)",
+    [DODOES, LATEST, FETCH, TOCFA, STORE, EXIT])
+
+FROMDOES = defWord("DOES>",
+    [BTICK, FROMDOES_PAREN, COMMA, BTICK, EXIT, COMMA,
+    BTICK, LIT, COMMA, LATEST, FETCH, TODFA, COMMA], flags=F_IMMED)
+    
 
 # Strings