# Word creation functions
-F_IMMED = 128
-F_HIDDEN = 256
-F_LENMASK = 127
+F_LENMASK = 31
+F_IMMED = 32
+F_HIDDEN = 64
+NFA_MARK = 128
function createHeader(name::AbstractString, flags::Int64)
mem[mem[H]] = mem[LATEST]
mem[LATEST] = mem[H]
mem[H] += 1
- mem[mem[H]] = length(name) | flags; mem[H] += 1
+ mem[mem[H]] = length(name) | flags | NFA_MARK; mem[H] += 1
putString(name, mem[H]); mem[H] += length(name)
end
F_IMMED_CFA = defConst("F_IMMED", F_IMMED)
F_HIDDEN_CFA = defConst("F_HIDDEN", F_HIDDEN)
F_LENMASK_CFA = defConst("F_LENMASK", F_LENMASK)
+NFA_MARK_CFA = defConst("NFA_MARK", NFA_MARK)
# Basic forth primitives
return NEXT
end)
+function raw_mode!(mode::Bool)
+ if ccall(:jl_tty_set_mode, Int32, (Ptr{Void}, Int32), STDIN.handle, mode) != 0
+ throw("FATAL: Terminal unable to enter raw mode.")
+ end
+end
+
+KEY = defPrimWord("KEY", () -> begin
+ raw_mode!(true)
+ pushPS(Int(readbytes(STDIN, 1)[1]))
+ raw_mode!(false)
+ return NEXT
+end)
+
SPAN, SPAN_CFA = defNewVar("SPAN", 0)
EXPECT = defPrimWord("EXPECT", () -> begin
maxLen = popPS()
# Dictionary searches
+TOCFA = defPrimWord(">CFA", () -> begin
+
+ addr = popPS()
+ lenAndFlags = mem[addr+1]
+ len = lenAndFlags & F_LENMASK
+
+ pushPS(addr + 2 + len)
+
+ return NEXT
+end)
+
+TOBODY = defWord(">BODY", [INCR, EXIT])
+
FIND = defPrimWord("FIND", () -> begin
countedAddr = popPS()
word = lowercase(getString(wordAddr, wordLen))
latest = LATEST
+ lenAndFlags = 0
i = 0
while (latest = mem[latest]) > 0
end
end
- pushPS(latest)
-
- return NEXT
-end)
-
-TOCFA = defPrimWord(">CFA", () -> begin
-
- addr = popPS()
- lenAndFlags = mem[addr+1]
- len = lenAndFlags & F_LENMASK
-
- pushPS(addr + 2 + len)
+ if latest > 0
+ pushPS(latest)
+ callPrim(mem[TOCFA])
+ if (lenAndFlags & F_IMMED) == F_IMMED
+ pushPS(1)
+ else
+ pushPS(-1)
+ end
+ else
+ pushPS(countedAddr)
+ pushPS(0)
+ end
return NEXT
end)
-TOPFA = defWord(">PFA", [TOCFA, INCR, EXIT])
# Branching
DUP, FETCH, ZE, ZBRANCH, 3,
DROP, EXIT, # Exit if TIB is exhausted
- STATE_CFA, FETCH, ZBRANCH, 31,
+ STATE_CFA, FETCH, ZBRANCH, 24,
# Compiling
- DUP, FIND, QDUP, ZBRANCH, 19,
+ FIND, QDUP, ZBRANCH, 13,
# Found word.
- SWAP, DROP,
- DUP, TOCFA, SWAP, INCR, FETCH, LIT, F_IMMED, AND, ZBRANCH, 4,
+ LIT, -1, EQ, INVERT, ZBRANCH, 4,
+
# Immediate: Execute!
- EXECUTE, BRANCH, -33,
+ EXECUTE, BRANCH, -26,
# Not immediate: Compile!
- COMMA, BRANCH, -36,
+ COMMA, BRANCH, -29,
# No word found, parse number
- NUMBER, BTICK, LIT, COMMA, COMMA, BRANCH, -43,
+ NUMBER, BTICK, LIT, COMMA, COMMA, BRANCH, -36,
# Interpreting
- DUP, FIND, QDUP, ZBRANCH, 7,
+ FIND, QDUP, ZBRANCH, 5,
# Found word. Execute!
- SWAP, DROP, TOCFA, EXECUTE, BRANCH, -54,
+ DROP, EXECUTE, BRANCH, -44,
# No word found, parse number and leave on stack
- NUMBER, BRANCH, -57,
+ NUMBER, BRANCH, -47,
EXIT]
)
end, flags=F_IMMED)
HIDDEN = defPrimWord("HIDDEN", () -> begin
- addr = popPS() + 1
- mem[addr] = mem[addr] $ F_HIDDEN
+ lenAndFlagsAddr = mem[LATEST] + 1
+ mem[lenAndFlagsAddr] = mem[lenAndFlagsAddr] $ F_HIDDEN
return NEXT
end)
-HIDE = defWord("HIDE",
- [LIT, 32, WORD,
- FIND,
- HIDDEN,
- EXIT])
-
COLON = defWord(":",
[LIT, 32, WORD,
HEADER,
LIT, DOCOL, COMMA,
- LATEST_CFA, FETCH, HIDDEN,
+ HIDDEN,
RBRAC,
EXIT])
SEMICOLON = defWord(";",
[LIT, EXIT, COMMA,
- LATEST_CFA, FETCH, HIDDEN,
+ HIDDEN,
LBRAC,
EXIT], flags=F_IMMED)