getString(addr::Int64, len::Int64) = AbstractString([Char(c) for c in mem[addr:(addr+len-1)]])
+function putString(str::AbstractString, addr::Int64)
+ mem[addr:(addr+length(str)-1)] = [Int64(c) for c in str]
+end
+
function putString(str::AbstractString, addr::Int64, maxLen::Int64)
len = min(length(str), maxLen)
mem[addr:(addr+len-1)] = [Int64(c) for c in str]
openFiles = Dict{Int64,IOStream}()
nextFileID = 1
-SOURCE_ID, SOURCE_ID_CFA = defNewVar("SOURCE-ID", 0)
## File access modes
end)
READ_LINE_CFA = defPrimWord("READ-LINE", () -> begin
+ fid = popPS()
+ maxSize = popPS()
+ addr = popPS()
+
+ fh = openFiles[fid]
+ line = readline(fh)
+
+ eofFlag = endswith(line, '\n') ? 0 : -1
+ line = chomp(line)
+
+ putString(line, addr, maxSize)
+
+ pushPS(length(line))
+ pushPS(eofFlag)
+ pushPS(0)
+
return NEXT
end)
TOIN, TOIN_CFA = defNewVar(">IN", 0)
+SOURCE_ID, SOURCE_ID_CFA = defNewVar("SOURCE-ID", 0)
+
+SOURCE_CFA = defPrimWord("SOURCE", () -> begin
+ if mem[SOURCE_ID] == 0
+ pushPS(TIB)
+ pushPS(NUMTIB)
+ else
+ pushPS(FIB)
+ pushPS(NUMFIB)
+ end
+ return NEXT
+end)
+
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.
QUERY_FILE_CFA = defWord("QUERY-FILE",
[FIB_CFA, LIT_CFA, 160, ROT_CFA, READ_LINE_CFA,
DROP_CFA, SWAP_CFA,
WORD_CFA = defPrimWord("WORD", () -> begin
delim = popPS()
- if mem[SOURCE_ID] == 0
- bufferAddr = TIB
- sizeAddr = NUMTIB
- else
- bufferAddr = FIB
- sizeAddr = NUMFIB
- end
+ callPrim(mem[SOURCE_CFA])
+ sizeAddr = popPS()
+ bufferAddr = popPS()
# Chew up initial occurrences of delim
while (mem[TOIN]<mem[sizeAddr] && mem[bufferAddr+mem[TOIN]] == delim)
[LIT_CFA, 32, WORD_CFA, # Read next space-delimited word
DUP_CFA, FETCH_CFA, ZE_CFA, ZBRANCH_CFA, 3,
- DROP_CFA, EXIT_CFA, # Exit if TIB is exhausted
+ DROP_CFA, EXIT_CFA, # Exit if input buffer is exhausted
STATE_CFA, FETCH_CFA, ZBRANCH_CFA, 24,
# Compiling
INTERPRET_CFA, PROMPT_CFA,
BRANCH_CFA,-4])
+INCLUDED_CFA = defWord("INCLUDED",
+ [SOURCE_ID_CFA, FETCH_CFA, TOR_CFA, # Store current source on return stack
+ FAM_RO_CFA, OPEN_FILE_CFA, DROP_CFA, # Open the file named by this word.
+ DUP_CFA, SOURCE_ID_CFA, STORE_CFA, # Mark this as the current source
+ DUP_CFA, QUERY_FILE_CFA, # Read line from file
+ INTERPRET_CFA,
+ INVERT_CFA, ZBRANCH_CFA, -5,
+ DROP_CFA, EXIT_CFA])
+
+INCLUDE_CFA = defWord("INCLUDE", [LIT_CFA, 32, WORD_CFA, INCLUDED_CFA]);
+
+
ABORT_CFA = defWord("ABORT",
[CLOSE_FILES_CFA, PSP0_CFA, PSPSTORE_CFA, QUIT_CFA])
return 0
end)
+EOF_CFA = defPrimWord("\x04", () -> begin
+ return 0
+end)
+
#### VM loop ####
initialized = false
function run(;initialize=true)
+ # Start with IP pointing to first instruction of outer interpreter
+ pushRS(QUIT_CFA+1)
+
+ # Load library files
global initialized, initFileName
if !initialized && initialize
if initFileName != nothing
end
end
- # Start with IP pointing to first instruction of outer interpreter
- reg.IP = QUIT_CFA + 1
# Primitive processing loop.
# Everyting else is simply a consequence of this loop!
- jmp = NEXT
+ jmp = mem[EXIT_CFA]
while jmp != 0
try
#println("Entering prim $(getPrimName(jmp))")