X-Git-Url: https://thelambdalab.xyz/gitweb/index.cgi?a=blobdiff_plain;f=src%2Fforth.jl;h=877c2d2c7bed41cb1d3c81f9ace117be74f174a7;hb=b5c0bc63b635d113a5fafacbf5c0c7634a9a3012;hp=c2019d45a025bae66aaf3879d042b312d1bf7fb4;hpb=231a3650050eba3a478b814b149963eb3e0625e7;p=forth.jl.git diff --git a/src/forth.jl b/src/forth.jl index c2019d4..877c2d2 100644 --- a/src/forth.jl +++ b/src/forth.jl @@ -683,7 +683,7 @@ READ_LINE_CFA = defPrimWord("READ-LINE", () -> begin eofFlag = endswith(line, '\n') ? 0 : -1 line = chomp(line) - println("Reading: $line"); + #println("Reading: $line"); putString(line, addr, maxSize) @@ -969,27 +969,18 @@ FIB_CFA = defConst("FIB", FIB) NUMFIB, NUMFIB_CFA = defNewVar("#FIB", 0) IB_CFA = defPrimWord("IB", () -> begin - pushPS(mem[SOURCE_ID] == 0 ? TIB : FIB) + pushPS(mem[SOURCE_ID_VAR] == 0 ? TIB : FIB) + return NEXT end) NUMIB_CFA = defPrimWord("#IB", () -> begin - pushPS(mem[SOURCE_ID] == 0 ? NUMTIB : NUMFIB) + pushPS(mem[SOURCE_ID_VAR] == 0 ? NUMTIB : NUMFIB) + return NEXT end) TOIN, TOIN_CFA = defNewVar(">IN", 0) -SOURCE_ID, SOURCE_ID_CFA = defNewVar("SOURCE-ID", 0) - -SOURCE_CFA = defPrimWord("SOURCE", () -> begin - if mem[SOURCE_ID] == 0 - pushPS(TIB) - pushPS(NUMTIB) - else - pushPS(FIB) - pushPS(NUMFIB) - end - return NEXT -end) +SOURCE_ID_VAR, SOURCE_ID_VAR_CFA = defNewVar("SOURCE-ID-VAR", 0) QUERY_CFA = defWord("QUERY", [TIB_CFA, LIT_CFA, 160, EXPECT_CFA, @@ -997,20 +988,27 @@ QUERY_CFA = defWord("QUERY", LIT_CFA, 0, TOIN_CFA, STORE_CFA, EXIT_CFA]) -# ( fid -- flag ) -# Flag is false when EOF is reached. +EOF_FLAG, EOF_FLAG_CFA = defNewVar("EOF-FLAG", 0) + +# ( fid -- ) +# EOF-FLAG set to true if EOF is reached QUERY_FILE_CFA = defWord("QUERY-FILE", [FIB_CFA, LIT_CFA, 160, ROT_CFA, READ_LINE_CFA, - DROP_CFA, SWAP_CFA, + DROP_CFA, EOF_FLAG_CFA, STORE_CFA, NUMFIB_CFA, STORE_CFA, + LIT_CFA, 0, TOIN_CFA, STORE_CFA, EXIT_CFA]) WORD_CFA = defPrimWord("WORD", () -> begin delim = popPS() - callPrim(mem[SOURCE_CFA]) - sizeAddr = popPS() - bufferAddr = popPS() + if mem[SOURCE_ID_VAR] == 0 + bufferAddr = TIB + sizeAddr = NUMTIB + else + bufferAddr = FIB + sizeAddr = NUMFIB + end # Chew up initial occurrences of delim while (mem[TOIN] begin mem[countAddr] = count pushPS(countAddr) - #println("Processing word: '$(getString(countAddr+1,mem[countAddr]))'") + #println("Processing word: '$(getString(countAddr+1,mem[countAddr]))' (state $(mem[STATE]))") return NEXT end) @@ -1136,42 +1134,18 @@ IMMEDIATE_CFA = defPrimWord("IMMEDIATE", () -> begin return NEXT end, flags=F_IMMED) -CODE_CFA = defPrimWord("CODE", () -> begin - pushPS(32) - callPrim(mem[WORD_CFA]) - callPrim(mem[HEADER_CFA]) - - exprString = "() -> begin\n" - while true - if mem[TOIN] >= mem[NUMTIB] - exprString = string(exprString, "\n") - if currentSource() == STDIN - println() - end - - pushPS(TIB) - pushPS(160) - callPrim(mem[EXPECT_CFA]) - mem[NUMTIB] = mem[SPAN] - mem[TOIN] = 0 - end - - pushPS(32) - callPrim(mem[WORD_CFA]) - cAddr = popPS() - thisWord = getString(cAddr+1, mem[cAddr]) - - if uppercase(thisWord) == "END-CODE" - break - end - - exprString = string(exprString, " ", thisWord) - end - exprString = string(exprString, "\nreturn NEXT\nend") - +# ( addr n -- primAddr ) +CREATE_PRIM_CFA = defPrimWord("CREATE-PRIM", () -> begin + len = popPS() + addr = popPS() + + exprString = string("() -> begin\n", + getString(addr, len), "\n", + "return NEXT\n", + "end") func = eval(parse(exprString)) - dictWrite(defPrim(func)) + pushPS(defPrim(func)) return NEXT end) @@ -1225,7 +1199,7 @@ end) QUIT_CFA = defWord("QUIT", [LIT_CFA, 0, STATE_CFA, STORE_CFA, # Set mode to interpret - LIT_CFA, 0, SOURCE_ID_CFA, STORE_CFA, # Set terminal as input stream + LIT_CFA, 0, SOURCE_ID_VAR_CFA, STORE_CFA, # Set terminal as input stream LIT_CFA, 0, NUMTIB_CFA, STORE_CFA, # Clear the input buffer RSP0_CFA, RSPSTORE_CFA, # Clear the return stack QUERY_CFA, # Read line of input @@ -1233,19 +1207,49 @@ QUIT_CFA = defWord("QUIT", BRANCH_CFA,-4]) # Loop INCLUDED_CFA = defWord("INCLUDED", - [LIT_CFA, 0, STATE_CFA, STORE_CFA, # Set mode to interpret - SOURCE_ID_CFA, FETCH_CFA, TOR_CFA, # Store current source on return stack - FAM_RO_CFA, OPEN_FILE_CFA, DROP_CFA, # Open the file - DUP_CFA, SOURCE_ID_CFA, STORE_CFA, # Mark this as the current source - DUP_CFA, QUERY_FILE_CFA, # Read line from file - INTERPRET_CFA, # Interpret line - ZBRANCH_CFA, -4, # Loop if not EOF - CLOSE_FILE_CFA, DROP_CFA, # Close file - FROMR_CFA, SOURCE_ID_CFA, STORE_CFA, # Restore input source + [LIT_CFA, 0, STATE_CFA, STORE_CFA, # Set mode to interpret + FAM_RO_CFA, OPEN_FILE_CFA, DROP_CFA, # Open the file + SOURCE_ID_VAR_CFA, FETCH_CFA, SWAP_CFA, # Store current source on stack + SOURCE_ID_VAR_CFA, STORE_CFA, # Mark this as the current source + SOURCE_ID_VAR_CFA, FETCH_CFA, QUERY_FILE_CFA, # Read line from file + EOF_FLAG_CFA, FETCH_CFA, + NUMFIB_CFA, FETCH_CFA, ZE_CFA, AND_CFA, # Test for EOF and empty line + INVERT_CFA, ZBRANCH_CFA, 4, # Break out if EOF + INTERPRET_CFA, # Interpret line + BRANCH_CFA, -14, # Loop + SOURCE_ID_VAR_CFA, FETCH_CFA, + CLOSE_FILE_CFA, DROP_CFA, # Close file + SOURCE_ID_VAR_CFA, STORE_CFA, # Restore input source + LIT_CFA, 0, NUMIB_CFA, STORE_CFA, # Zero #IB + LIT_CFA, 0, TOIN_CFA, STORE_CFA, # Zero >IN EXIT_CFA]) -INCLUDE_CFA = defWord("INCLUDE", [LIT_CFA, 32, WORD_CFA, INCLUDED_CFA, EXIT_CFA]); +INCLUDE_CFA = defWord("INCLUDE", [LIT_CFA, 32, WORD_CFA, + DUP_CFA, INCR_CFA, + SWAP_CFA, FETCH_CFA, + INCLUDED_CFA, EXIT_CFA]); +oldCWD = "" +SETLIBCWD_CFA = defPrimWord("SETLIBCWD", () -> begin + global oldCWD = pwd() + if !isfile("lib.4th") # Exception for debugging. + cd(Pkg.dir("forth","src")) + end + return NEXT +end) + +RESTORECWD_CFA = defPrimWord("RESTORECWD", () -> begin + cd(oldCWD) + return NEXT +end) + +INCLUDED_LIB_CFA = defWord("INCLUDED-LIB", + [SETLIBCWD_CFA, INCLUDED_CFA, RESTORECWD_CFA, EXIT_CFA]) + +INCLUDE_LIB_CFA = defWord("INCLUDE-LIB", [LIT_CFA, 32, WORD_CFA, + DUP_CFA, INCR_CFA, + SWAP_CFA, FETCH_CFA, + INCLUDED_LIB_CFA, EXIT_CFA]); ABORT_CFA = defWord("ABORT", [CLOSE_FILES_CFA, DROP_CFA, PSP0_CFA, PSPSTORE_CFA, QUIT_CFA]) @@ -1262,12 +1266,7 @@ end) #### VM loop #### initialized = false -initFileName = nothing -if isfile("lib.4th") - initFileName = "lib.4th" -elseif isfile(Pkg.dir("forth","src", "lib.4th")) - initFileName = Pkg.dir("forth","src","lib.4th") -end +initFileName = "lib.4th" function run(;initialize=true) @@ -1283,7 +1282,7 @@ function run(;initialize=true) putString(initFileName, mem[H]) pushPS(mem[H]) pushPS(length(initFileName)) - pushRS(INCLUDED_CFA+1) + pushRS(INCLUDED_LIB_CFA+1) initialized = true else