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Correct FORTH behaviour implemented.
[forth.jl.git]
/
src
/
forth.jl
diff --git
a/src/forth.jl
b/src/forth.jl
index
8cc7547
..
63e7d57
100644
(file)
--- a/
src/forth.jl
+++ b/
src/forth.jl
@@
-16,16
+16,16
@@
primNames = Array{ASCIIString,1}()
# Built-in variables
nextVarAddr = 1
# Built-in variables
nextVarAddr = 1
-H = nextVarAddr; nextVarAddr += 1 # Next free memory address
-FORTH = nextVarAddr; nextVarAddr += 1 # LFA of latest word in system dict
-CURRENT = nextVarAddr; nextVarAddr += 1 # Current compilation dict
+H = nextVarAddr; nextVarAddr += 1
# Next free memory address
+FORTH
_LATEST
= nextVarAddr; nextVarAddr += 1 # LFA of latest word in system dict
+CURRENT = nextVarAddr; nextVarAddr += 1
# Current compilation dict
RSP0 = nextVarAddr # bottom of RS
PSP0 = RSP0 + size_RS # bottom of PS
TIB = PSP0 + size_PS # address of terminal input buffer
mem[H] = TIB + size_TIB # location of bottom of dictionary
RSP0 = nextVarAddr # bottom of RS
PSP0 = RSP0 + size_RS # bottom of PS
TIB = PSP0 + size_PS # address of terminal input buffer
mem[H] = TIB + size_TIB # location of bottom of dictionary
-mem[FORTH
] = 0
# no previous definition
-mem[CURRENT] = FORTH
# Compile words to system dict initially
+mem[FORTH
_LATEST] = 0
# no previous definition
+mem[CURRENT] = FORTH
_LATEST
# Compile words to system dict initially
DICT = mem[H] # Save bottom of dictionary as constant
DICT = mem[H] # Save bottom of dictionary as constant
@@
-109,21
+109,27
@@
F_IMMED = 32
F_HIDDEN = 64
NFA_MARK = 128
F_HIDDEN = 64
NFA_MARK = 128
+function dictWrite(ints::Array{Int64,1})
+ mem[mem[H]:(mem[H]+length(ints)-1)] = ints
+ mem[H] += length(ints)
+end
+dictWrite(int::Int64) = dictWrite([int])
+dictWriteString(string::ASCIIString) = dictWrite([Int64(c) for c in string])
+
function createHeader(name::AbstractString, flags::Int64)
mem[mem[H]] = mem[mem[CURRENT]]
mem[mem[CURRENT]] = mem[H]
mem[H] += 1
function createHeader(name::AbstractString, flags::Int64)
mem[mem[H]] = mem[mem[CURRENT]]
mem[mem[CURRENT]] = mem[H]
mem[H] += 1
- mem[mem[H]] = length(name) | flags | NFA_MARK; mem[H] += 1
-
putString(name, mem[H]); mem[H] += length
(name)
+ dictWrite(length(name) | flags | NFA_MARK)
+
dictWriteString
(name)
end
function defPrimWord(name::AbstractString, f::Function; flags::Int64=0)
createHeader(name, flags)
codeWordAddr = mem[H]
end
function defPrimWord(name::AbstractString, f::Function; flags::Int64=0)
createHeader(name, flags)
codeWordAddr = mem[H]
- mem[codeWordAddr] = defPrim(f, name=name)
- mem[H] += 1
+ dictWrite(defPrim(f, name=name))
return codeWordAddr
end
return codeWordAddr
end
@@
-132,13
+138,9
@@
function defWord(name::AbstractString, wordAddrs::Array{Int64,1}; flags::Int64=0
createHeader(name, flags)
addr = mem[H]
createHeader(name, flags)
addr = mem[H]
- mem[mem[H]] = DOCOL
- mem[H] += 1
+ dictWrite(DOCOL)
- for wordAddr in wordAddrs
- mem[mem[H]] = wordAddr
- mem[H] += 1
- end
+ dictWrite(wordAddrs)
return addr
end
return addr
end
@@
-159,8
+161,8
@@
function defNewVar(name::AbstractString, initial::Array{Int64,1}; flags::Int64=0
codeWordAddr = mem[H]
varAddr = mem[H] + 1
codeWordAddr = mem[H]
varAddr = mem[H] + 1
- mem[mem[H]] = DOVAR; mem[H] += 1
-
mem[mem[H]:(mem[H]+length(initial)-1)] = initial; mem[H] += length
(initial)
+ dictWrite(DOVAR)
+
dictWrite
(initial)
return varAddr, codeWordAddr
end
return varAddr, codeWordAddr
end
@@
-173,8
+175,8
@@
function defConst(name::AbstractString, val::Int64; flags::Int64=0)
codeWordAddr = mem[H]
codeWordAddr = mem[H]
- mem[mem[H]] = DOCON; mem[H] += 1
- mem[mem[H]] = val; mem[H] += 1
+ dictWrite(DOCON)
+ dictWrite(val)
return codeWordAddr
end
return codeWordAddr
end
@@
-211,7
+213,6
@@
end)
# Dictionary entries for core built-in variables, constants
H_CFA = defExistingVar("H", H)
# Dictionary entries for core built-in variables, constants
H_CFA = defExistingVar("H", H)
-FORTH_CFA = defExistingVar("FORTH", FORTH)
CURRENT_CFA = defExistingVar("CURRENT", CURRENT)
PSP0_CFA = defConst("PSP0", PSP0)
CURRENT_CFA = defExistingVar("CURRENT", CURRENT)
PSP0_CFA = defConst("PSP0", PSP0)
@@
-696,7
+697,7
@@
end)
# Dictionary searches
# Dictionary searches
-
LFATOCFA_CFA = defPrimWord("LFA>CFA
", () -> begin
+
FROMLINK_CFA = defPrimWord("LINK>
", () -> begin
addr = popPS()
lenAndFlags = mem[addr+1]
addr = popPS()
lenAndFlags = mem[addr+1]
@@
-707,7
+708,13
@@
LFATOCFA_CFA = defPrimWord("LFA>CFA", () -> begin
return NEXT
end)
return NEXT
end)
-TOBODY_CFA = defWord(">BODY", [INCR_CFA, EXIT_CFA])
+createHeader("FORTH", 0)
+FORTH_CFA = mem[H]
+dictWrite(defPrim(() -> begin
+ mem[CONTEXT] = reg.W
+ return NEXT
+end, name="FORTH"))
+dictWrite(FORTH_LATEST)
CONTEXT, CONTEXT_CFA = defNewVar("CONTEXT", zeros(Int64, 100))
mem[CONTEXT] = FORTH_CFA
CONTEXT, CONTEXT_CFA = defNewVar("CONTEXT", zeros(Int64, 100))
mem[CONTEXT] = FORTH_CFA
@@
-726,8
+733,7
@@
FIND_CFA = defPrimWord("FIND", () -> begin
lfa = 0
for vocabCFA in reverse(context)
lfa = 0
for vocabCFA in reverse(context)
- callPrim(mem[vocabCFA])
- lfa = popPS()
+ lfa = mem[vocabCFA+1]
while (lfa = mem[lfa]) > 0
while (lfa = mem[lfa]) > 0
@@
-753,7
+759,7
@@
FIND_CFA = defPrimWord("FIND", () -> begin
if lfa > 0
pushPS(lfa)
if lfa > 0
pushPS(lfa)
- callPrim(mem[
LFATOCFA
_CFA])
+ callPrim(mem[
FROMLINK
_CFA])
if (lenAndFlags & F_IMMED) == F_IMMED
pushPS(1)
else
if (lenAndFlags & F_IMMED) == F_IMMED
pushPS(1)
else
@@
-888,7
+894,7
@@
end, name="DODOES")
DOES_HELPER_CFA = defPrimWord("(DOES>)", () -> begin
pushPS(mem[mem[CURRENT]])
DOES_HELPER_CFA = defPrimWord("(DOES>)", () -> begin
pushPS(mem[mem[CURRENT]])
- callPrim(mem[
LFATOCFA
_CFA])
+ callPrim(mem[
FROMLINK
_CFA])
cfa = popPS()
runtimeAddr = popPS()
cfa = popPS()
runtimeAddr = popPS()
@@
-899,7
+905,7
@@
DOES_HELPER_CFA = defPrimWord("(DOES>)", () -> begin
end)), name="doesPrim")
return NEXT
end)), name="doesPrim")
return NEXT
-end, flags=F_IMMED)
+end, flags=F_IMMED
| F_HIDDEN
)
DOES_CFA = defWord("DOES>",
[LIT_CFA, LIT_CFA, COMMA_CFA, HERE_CFA, LIT_CFA, 3, ADD_CFA, COMMA_CFA,
DOES_CFA = defWord("DOES>",
[LIT_CFA, LIT_CFA, COMMA_CFA, HERE_CFA, LIT_CFA, 3, ADD_CFA, COMMA_CFA,