return NEXT
end)
+NUMCONTEXT, NUMCONTEXT_CFA = defNewVar("#CONTEXT", 1)
+
createHeader("FORTH", 0)
FORTH_CFA = mem[H]
dictWrite(defPrim(() -> begin
- mem[CONTEXT] = reg.W
+ mem[CONTEXT + mem[NUMCONTEXT] - 1] = reg.W
return NEXT
end, name="FORTH"))
dictWrite(0) # cell for latest
CONTEXT, CONTEXT_CFA = defNewVar("CONTEXT", zeros(Int64, 10))
mem[CONTEXT] = FORTH_CFA
-NUMCONTEXT, NUMCONTEXT_CFA = defNewVar("#CONTEXT", 1)
-
-FIND_CFA = defPrimWord("FIND", () -> begin
+FINDVOCAB_CFA = defPrimWord("FINDVOCAB", () -> begin
+ vocabCFA = popPS()
countedAddr = popPS()
+
wordAddr = countedAddr + 1
wordLen = mem[countedAddr]
word = lowercase(getString(wordAddr, wordLen))
- context = mem[CONTEXT:(CONTEXT+mem[NUMCONTEXT]-1)]
-
+ lfa = vocabCFA+1
lenAndFlags = 0
- lfa = 0
- for vocabCFA in reverse(context)
- lfa = vocabCFA+1
-
- while (lfa = mem[lfa]) > 0
-
- lenAndFlags = mem[lfa+1]
- len = lenAndFlags & F_LENMASK
- hidden = (lenAndFlags & F_HIDDEN) == F_HIDDEN
-
- if hidden || len != wordLen
- continue
- end
+ while (lfa = mem[lfa]) > 0
- thisWord = lowercase(getString(lfa+2, len))
+ lenAndFlags = mem[lfa+1]
+ len = lenAndFlags & F_LENMASK
+ hidden = (lenAndFlags & F_HIDDEN) == F_HIDDEN
- if thisWord == word
- break
- end
+ if hidden || len != wordLen
+ continue
end
- if lfa>0
+ thisWord = lowercase(getString(lfa+2, len))
+
+ if thisWord == word
break
end
end
return NEXT
end)
+FIND_CFA = defPrimWord("FIND", () -> begin
+
+ countedAddr = popPS()
+ context = mem[CONTEXT:(CONTEXT+mem[NUMCONTEXT]-1)]
+
+ for vocabCFA in reverse(context)
+ pushPS(countedAddr)
+ pushPS(vocabCFA)
+ callPrim(mem[FINDVOCAB_CFA])
+
+ callPrim(mem[DUP_CFA])
+ if popPS() != 0
+ return NEXT
+ else
+ popPS()
+ popPS()
+ end
+ end
+
+ pushPS(countedAddr)
+ pushPS(0)
+
+ return NEXT
+end)
+
# Branching