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)
[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])
+INTERPRET_CFA = defWord("INTERPRET",
+ [SOURCE_ID_CFA, FETCH_CFA, TOR_CFA, # Store current source on return stack
+
+ LIT_CFA, 32, WORD_CFA, # Read next word from current input source
+
+ 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,
+
+ BRANCH_CFA, -4])
+
+
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))")