\ SEE.FS highend SEE for ANSforth 16may93jaw \ May be cross-compiled \ I'm sorry. This is really not "forthy" enough. \ Ideas: Level should be a stack decimal \ Screen format words 16may93jaw VARIABLE C-Output 1 C-Output ! VARIABLE C-Formated 1 C-Formated ! VARIABLE C-Highlight 0 C-Highlight ! VARIABLE C-Clearline 0 C-Clearline ! VARIABLE XPos VARIABLE YPos VARIABLE Level : Format C-Formated @ C-Output @ and IF dup spaces XPos +! ELSE drop THEN ; : level+ 7 Level +! Level @ XPos @ - dup 0> IF Format ELSE drop THEN ; : level- -7 Level +! ; VARIABLE nlflag DEFER nlcount ' noop IS nlcount : nl nlflag on ; : (nl) nlcount XPos @ Level @ = ?Exit C-Formated @ IF C-Output @ IF C-Clearline @ IF 80 XPos @ - spaces ELSE cr THEN 1 YPos +! 0 XPos ! Level @ spaces THEN Level @ XPos ! THEN ; : warp? ( len -- len ) nlflag @ IF (nl) nlflag off THEN XPos @ over + 79 u> IF (nl) THEN ; : ctype ( adr len -- ) warp? dup XPos +! C-Output @ IF type ELSE 2drop THEN ; : cemit 1 warp? over bl = Level @ XPos @ = and IF 2drop ELSE XPos +! C-Output @ IF emit ELSE drop THEN THEN ; DEFER .string [IFDEF] Green VARIABLE Colors Colors on : (.string) ( c-addr u n -- ) over warp? drop Colors @ IF C-Highlight @ ?dup IF CT@ swap CT@ or ELSE CT@ THEN attr! ELSE drop THEN ctype ct @ attr! ; [ELSE] : (.string) ( c-addr u n -- ) drop ctype ; [THEN] ' (.string) IS .string : .struc Str# .string ; \ CODES 15may93jaw 21 CONSTANT RepeatCode 22 CONSTANT AgainCode 23 CONSTANT UntilCode \ 09 CONSTANT WhileCode 10 CONSTANT ElseCode 11 CONSTANT AheadCode 13 CONSTANT WhileCode2 14 CONSTANT Disable \ FORMAT WORDS 13jun93jaw VARIABLE C-Stop VARIABLE Branches VARIABLE BranchPointer VARIABLE SearchPointer CREATE BranchTable 500 allot here 3 cells - ACONSTANT MaxTable : FirstBranch BranchTable cell+ SearchPointer ! ; : (BranchAddr?) ( a-addr -- a-addr true | false ) SearchPointer @ BEGIN dup BranchPointer @ u< WHILE dup @ 2 pick <> WHILE 3 cells + REPEAT nip dup 3 cells + SearchPointer ! true ELSE 2drop false THEN ; : BranchAddr? FirstBranch (BranchAddr?) ; ' (BranchAddr?) ALIAS MoreBranchAddr? : CheckEnd ( a-addr -- true | false ) BranchTable cell+ BEGIN dup BranchPointer @ u< WHILE dup @ 2 pick u<= WHILE 3 cells + REPEAT 2drop false ELSE 2drop true THEN ; \ \ addrw addrt \ BEGIN ... WHILE ... AGAIN ... THEN \ ^ ! ! ^ \ ----------+--------+ ! \ ! ! \ +-------------------+ \ \ : CheckWhile ( a-addrw a-addrt -- true | false ) BranchTable BEGIN dup BranchPointer @ u< WHILE dup @ 3 pick u> over @ 3 pick u< and IF dup cell+ @ 3 pick u< IF 2drop drop true EXIT THEN THEN 3 cells + REPEAT 2drop drop false ; : ,Branch ( a-addr -- ) BranchPointer @ dup MaxTable u> ABORT" SEE: Table overflow" ! 1 cells BranchPointer +! ; : Type! ( u -- ) BranchPointer @ 1 cells - ! ; : Branch! ( a-addr rel -- a-addr ) over + over ,Branch ,Branch 0 ,Branch ; \ DEFER CheckUntil VARIABLE NoOutput VARIABLE C-Pass 0 CONSTANT ScanMode 1 CONSTANT DisplayMode 2 CONSTANT DebugMode : Scan? ( -- flag ) C-Pass @ 0= ; : Display? ( -- flag ) C-Pass @ 1 = ; : Debug? ( -- flag ) C-Pass @ 2 = ; : back? ( n -- flag ) 0< ; : ahead? ( n -- flag ) 0> ; : c-(compile) Display? IF s" POSTPONE " Com# .string dup @ look 0= ABORT" SEE: No valid XT" cell+ count $1F and 0 .string bl cemit THEN cell+ ; : c-lit Display? IF dup @ dup abs 0 <# #S rot sign #> 0 .string bl cemit THEN cell+ ; : c-flit Display? IF dup f@ scratch represent 0= IF 2drop scratch 3 min 0 .string ELSE IF '- cemit THEN 1- scratch over c@ cemit '. cemit 1 /string 0 .string 'E cemit dup abs 0 <# #S rot sign #> 0 .string bl cemit THEN THEN float+ ; : c-s" count 2dup + aligned -rot Display? IF [char] S cemit [char] " cemit bl cemit 0 .string [char] " cemit bl cemit ELSE 2drop THEN ; : c-." count 2dup + aligned -rot Display? IF [char] . cemit [char] " cemit bl cemit 0 .string [char] " cemit bl cemit ELSE 2drop THEN ; : c-c" count 2dup + aligned -rot Display? IF [char] C cemit [char] " cemit bl cemit 0 .string [char] " cemit bl cemit ELSE 2drop THEN ; : Forward? ( a-addr true | false -- ) IF dup dup @ swap 1 cells - @ - Ahead? IF true ELSE drop false THEN \ only if forward jump ELSE false THEN ; : RepeatCheck IF BEGIN 2dup 1 cells - @ swap dup @ + u<= WHILE drop dup cell+ MoreBranchAddr? 0= UNTIL false ELSE true THEN ELSE false THEN ; : c-branch Scan? IF dup @ Branch! dup @ back? IF \ might be: AGAIN, REPEAT dup cell+ BranchAddr? Forward? RepeatCheck IF RepeatCode Type! cell+ Disable swap ! ELSE AgainCode Type! THEN ELSE dup cell+ BranchAddr? Forward? IF ElseCode Type! drop ELSE AheadCode Type! THEN THEN THEN Display? IF dup @ back? IF \ might be: AGAIN, REPEAT level- nl dup cell+ BranchAddr? Forward? RepeatCheck IF drop S" REPEAT " .struc nl ELSE S" AGAIN " .struc nl THEN ELSE dup cell+ BranchAddr? Forward? IF dup cell+ @ WhileCode2 = IF nl S" ELSE" .struc level+ ELSE level- nl S" ELSE" .struc level+ THEN cell+ Disable swap ! ELSE S" AHEAD" .struc level+ THEN THEN THEN Debug? IF dup @ + ELSE cell+ THEN ; : MyBranch ( a-addr -- a-addr a-addr2 ) dup @ over + BranchAddr? BEGIN WHILE 1 cells - @ over <> WHILE dup @ over + MoreBranchAddr? REPEAT SearchPointer @ 3 cells - ELSE true ABORT" SEE: Table failure" THEN ; : DebugBranch Debug? IF dup @ over + swap THEN ; \ return 2 different addresses : c-?branch Scan? IF dup @ Branch! dup @ Back? IF UntilCode Type! THEN THEN Display? IF dup @ Back? IF level- nl S" UNTIL " .struc nl ELSE dup dup @ over + CheckWhile IF MyBranch cell+ dup @ 0= IF WhileCode2 swap ! ELSE drop THEN level- nl S" WHILE" .struc level+ ELSE nl S" IF" .struc level+ THEN THEN THEN DebugBranch cell+ ; : c-do Display? IF nl S" DO" .struc level+ THEN ; : c-?do Display? IF nl S" ?DO" .struc level+ THEN DebugBranch cell+ ; : c-for Display? IF nl S" FOR" .struc level+ THEN ; : c-next Display? IF level- nl S" NEXT " .struc nl THEN DebugBranch cell+ cell+ ; : c-loop Display? IF level- nl S" LOOP " .struc nl THEN DebugBranch cell+ cell+ ; : c-+loop Display? IF level- nl S" +LOOP " .struc nl THEN DebugBranch cell+ cell+ ; : c-leave Display? IF S" LEAVE " .struc THEN Debug? IF dup @ + THEN cell+ ; : c-?leave Display? IF S" ?LEAVE " .struc THEN cell+ DebugBranch swap cell+ swap cell+ ; : c-exit dup 1 cells - CheckEnd IF Display? IF nlflag off S" ;" Com# .string THEN C-Stop on ELSE Display? IF S" EXIT " .struc THEN THEN Debug? IF drop THEN ; : c-;code \ end of create part Display? IF S" DOES> " Com# .string THEN Cell+ cell+ ; : c-abort" count 2dup + aligned -rot Display? IF S" ABORT" .struc [char] " cemit bl cemit 0 .string [char] " cemit bl cemit ELSE 2drop THEN ; CREATE C-Table ' lit A, ' c-lit A, ' flit A, ' c-flit A, ' (s") A, ' c-s" A, ' (.") A, ' c-." A, ' "lit A, ' c-c" A, ' ?branch A, ' c-?branch A, ' branch A, ' c-branch A, ' leave A, ' c-leave A, ' ?leave A, ' c-?leave A, ' (do) A, ' c-do A, ' (?do) A, ' c-?do A, ' (for) A, ' c-for A, ' (loop) A, ' c-loop A, ' (+loop) A, ' c-+loop A, ' (next) A, ' c-next A, ' ;s A, ' c-exit A, ' (;code) A, ' c-;code A, ' (abort") A, ' c-abort" A, ' (compile) A, ' c-(compile) A, 0 , \ DOTABLE 15may93jaw : DoTable ( cfa -- flag ) C-Table BEGIN dup @ dup WHILE 2 pick <> WHILE 2 cells + REPEAT nip cell+ @ EXECUTE true ELSE 2drop drop false THEN ; : BranchTo? ( a-addr -- a-addr ) Display? IF dup BranchAddr? IF BEGIN cell+ @ dup 20 u> IF drop nl S" BEGIN " .struc level+ ELSE dup Disable <> IF WhileCode2 = IF nl S" THEN " .struc nl ELSE level- nl S" THEN " .struc nl THEN ELSE drop THEN THEN dup MoreBranchAddr? 0= UNTIL THEN THEN ; : analyse ( a-addr1 -- a-addr2 ) Branches @ IF BranchTo? THEN dup cell+ swap @ dup >r DoTable r> swap IF drop EXIT THEN Display? IF look 0= IF drop dup 1 cells - @ . \ ABORT" SEE: Bua!" ELSE dup cell+ count 31 and rot wordinfo .string THEN bl cemit ELSE drop THEN ; : c-init 0 YPos ! 0 XPos ! 0 Level ! nlflag off BranchTable BranchPointer ! c-stop off Branches on ; : makepass ( a-addr -- ) c-stop off BEGIN analyse c-stop @ UNTIL drop ; DEFER dosee : dopri .name ." is primitive" cr ; : dovar ." Variable " .name cr ; : douse ." User " .name cr ; : docon dup cell+ (name>) >body @ . ." Constant " .name cr ; : doval dup cell+ (name>) >body @ . ." Value " .name cr ; : dodef ." Defer " dup >r .name cr here @ look 0= ABORT" SEE: No valid xt in defered word" here @ look drop dosee cr ." ' " .name r> ." IS " .name cr ; : dodoe ." Create " dup .name cr S" DOES> " Com# .string XPos @ Level ! name> >does-code dup C-Pass @ DebugMode = IF ScanMode c-pass ! EXIT THEN ScanMode c-pass ! dup makepass DisplayMode c-pass ! makepass ; : doali here @ .name ." Alias " .name cr here @ dosee ; : docol S" : " Com# .string dup cell+ count $1F and 2 pick wordinfo .string bl cemit bl cemit ( XPos @ ) 2 Level ! name> >body C-Pass @ DebugMode = IF ScanMode c-pass ! EXIT THEN ScanMode c-pass ! dup makepass DisplayMode c-pass ! makepass ; create wordtypes Pri# , ' dopri A, Var# , ' dovar A, Con# , ' docon A, Val# , ' doval A, Def# , ' dodef A, Doe# , ' dodoe A, Ali# , ' doali A, Col# , ' docol A, Use# , ' douse A, 0 , : (dosee) ( lfa -- ) dup dup cell+ c@ >r wordinfo wordtypes BEGIN dup @ dup WHILE 2 pick = IF cell+ @ nip EXECUTE r> dup 32 and IF ." immediate" THEN 64 and IF ." restrict" THEN EXIT THEN 2 cells + REPEAT 2drop rdrop .name ." Don't know how to handle" cr ; ' (dosee) IS dosee : xtc ( xt -- ) \ do see at xt Look 0= ABORT" SEE: No valid XT" cr c-init dosee ; : see name sfind 0= IF ." Word unknown" cr exit THEN xtc ; : lfc cr c-init cell+ dosee ; : nfc cr c-init dosee ;