Tidying up after refactor.

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

diff --git a/src/forth.jl b/src/forth.jl
index acd6c45..a1a4799 100644 (file)
--- a/src/forth.jl
+++ b/src/forth.jl
@@ -683,7 +683,7 @@ READ_LINE_CFA = defPrimWord("READ-LINE", () -> begin
     eofFlag = endswith(line, '\n') ? 0 : -1
     line = chomp(line)
 
-    println("Reading: $line");
+    #println("Reading: $line");
 
     putString(line, addr, maxSize)
 
@@ -968,41 +968,47 @@ NUMTIB, NUMTIB_CFA = defNewVar("#TIB", 0)
 FIB_CFA = defConst("FIB", FIB)
 NUMFIB, NUMFIB_CFA = defNewVar("#FIB", 0)
 
-TOIN, TOIN_CFA = defNewVar(">IN", 0)
-
-SOURCE_ID, SOURCE_ID_CFA = defNewVar("SOURCE-ID", 0)
+IB_CFA = defPrimWord("IB", () -> begin
+    pushPS(mem[SOURCE_ID_VAR] == 0 ? TIB : FIB)
+    return NEXT
+end)
 
-SOURCE_CFA = defPrimWord("SOURCE", () -> begin
-    if mem[SOURCE_ID] == 0
-        pushPS(TIB)
-        pushPS(NUMTIB)
-    else
-        pushPS(FIB)
-        pushPS(NUMFIB)
-    end
+NUMIB_CFA = defPrimWord("#IB", () -> begin
+    pushPS(mem[SOURCE_ID_VAR] == 0 ? NUMTIB : NUMFIB)
     return NEXT
 end)
 
+TOIN, TOIN_CFA = defNewVar(">IN", 0)
+
+SOURCE_ID_VAR, SOURCE_ID_VAR_CFA = defNewVar("SOURCE-ID-VAR", 0)
+
 QUERY_CFA = defWord("QUERY",
     [TIB_CFA, LIT_CFA, 160, EXPECT_CFA,
     SPAN_CFA, FETCH_CFA, NUMTIB_CFA, STORE_CFA,
     LIT_CFA, 0, TOIN_CFA, STORE_CFA,
     EXIT_CFA])
 
-# ( fid -- flag )
-# Flag is false when EOF is reached.
+EOF_FLAG, EOF_FLAG_CFA = defNewVar("EOF-FLAG", 0)
+
+# ( fid -- )
+# EOF-FLAG set to true if EOF is reached
 QUERY_FILE_CFA = defWord("QUERY-FILE",
     [FIB_CFA, LIT_CFA, 160, ROT_CFA, READ_LINE_CFA,
-    DROP_CFA, SWAP_CFA,
+    DROP_CFA, EOF_FLAG_CFA, STORE_CFA,
     NUMFIB_CFA, STORE_CFA,
+    LIT_CFA, 0, TOIN_CFA, STORE_CFA,
     EXIT_CFA])
 
 WORD_CFA = defPrimWord("WORD", () -> begin
     delim = popPS()
 
-    callPrim(mem[SOURCE_CFA])
-    sizeAddr = popPS()
-    bufferAddr = popPS()
+    if mem[SOURCE_ID_VAR] == 0
+        bufferAddr = TIB
+        sizeAddr = NUMTIB
+    else
+        bufferAddr = FIB
+        sizeAddr = NUMFIB
+    end
 
     # Chew up initial occurrences of delim
     while (mem[TOIN]<mem[sizeAddr] && mem[bufferAddr+mem[TOIN]] == delim)
@@ -1030,7 +1036,7 @@ WORD_CFA = defPrimWord("WORD", () -> begin
     mem[countAddr] = count
     pushPS(countAddr)
 
-    #println("Processing word: '$(getString(countAddr+1,mem[countAddr]))'")
+    #println("Processing word: '$(getString(countAddr+1,mem[countAddr]))' (state $(mem[STATE]))")
 
     return NEXT
 end)
@@ -1217,7 +1223,7 @@ end)
 
 QUIT_CFA = defWord("QUIT",
     [LIT_CFA, 0, STATE_CFA, STORE_CFA,      # Set mode to interpret
-    LIT_CFA, 0, SOURCE_ID_CFA, STORE_CFA,   # Set terminal as input stream
+    LIT_CFA, 0, SOURCE_ID_VAR_CFA, STORE_CFA,   # Set terminal as input stream
     LIT_CFA, 0, NUMTIB_CFA, STORE_CFA,      # Clear the input buffer
     RSP0_CFA, RSPSTORE_CFA,                 # Clear the return stack
     QUERY_CFA,                              # Read line of input
@@ -1225,18 +1231,27 @@ QUIT_CFA = defWord("QUIT",
     BRANCH_CFA,-4])                         # Loop
 
 INCLUDED_CFA = defWord("INCLUDED",
-    [LIT_CFA, 0, STATE_CFA, STORE_CFA,      # Set mode to interpret
-    SOURCE_ID_CFA, FETCH_CFA, TOR_CFA,      # Store current source on return stack
-    FAM_RO_CFA, OPEN_FILE_CFA, DROP_CFA,    # Open the file
-    DUP_CFA, SOURCE_ID_CFA, STORE_CFA,      # Mark this as the current source
-    DUP_CFA, QUERY_FILE_CFA,                # Read line from file
-    INTERPRET_CFA,                          # Interpret line
-    ZBRANCH_CFA, -4,                        # Loop if not EOF
-    CLOSE_FILE_CFA, DROP_CFA,               # Close file
-    FROMR_CFA, SOURCE_ID_CFA, STORE_CFA,    # Restore input source
+    [LIT_CFA, 0, STATE_CFA, STORE_CFA,          # Set mode to interpret
+    FAM_RO_CFA, OPEN_FILE_CFA, DROP_CFA,        # Open the file
+    SOURCE_ID_VAR_CFA, FETCH_CFA, SWAP_CFA,         # Store current source on stack
+    SOURCE_ID_VAR_CFA, STORE_CFA,                   # Mark this as the current source
+    SOURCE_ID_VAR_CFA, FETCH_CFA, QUERY_FILE_CFA,   # Read line from file
+    EOF_FLAG_CFA, FETCH_CFA,
+    NUMFIB_CFA, FETCH_CFA, ZE_CFA, AND_CFA,     # Test for EOF and empty line
+    INVERT_CFA, ZBRANCH_CFA, 4,                 # Break out if EOF
+    INTERPRET_CFA,                              # Interpret line
+    BRANCH_CFA, -14,                            # Loop
+    SOURCE_ID_VAR_CFA, FETCH_CFA,
+    CLOSE_FILE_CFA, DROP_CFA,                   # Close file
+    SOURCE_ID_VAR_CFA, STORE_CFA,               # Restore input source
+    LIT_CFA, 0, NUMIB_CFA, STORE_CFA,           # Zero #IB
+    LIT_CFA, 0, TOIN_CFA, STORE_CFA,            # Zero >IN
     EXIT_CFA])
 
-INCLUDE_CFA = defWord("INCLUDE", [LIT_CFA, 32, WORD_CFA, INCLUDED_CFA, EXIT_CFA]);
+INCLUDE_CFA = defWord("INCLUDE", [LIT_CFA, 32, WORD_CFA,
+    DUP_CFA, INCR_CFA,
+    SWAP_CFA, FETCH_CFA,
+    INCLUDED_CFA, EXIT_CFA]);
 
 
 ABORT_CFA = defWord("ABORT",