--- gforth/Attic/kernel.fs 1997/02/06 21:23:01 1.13 +++ gforth/Attic/kernel.fs 1997/04/10 21:32:08 1.24 @@ -24,35 +24,52 @@ HEX \ labels for some code addresses +doer? :docon [IF] : docon: ( -- addr ) \ gforth \G the code address of a @code{CONSTANT} ['] bl >code-address ; +[THEN] : docol: ( -- addr ) \ gforth \G the code address of a colon definition - ['] docon: >code-address ; + ['] docol: >code-address ; +doer? :dovar [IF] : dovar: ( -- addr ) \ gforth \G the code address of a @code{CREATE}d word ['] udp >code-address ; +[THEN] +doer? :douser [IF] : douser: ( -- addr ) \ gforth \G the code address of a @code{USER} variable ['] s0 >code-address ; +[THEN] +doer? :dodefer [IF] : dodefer: ( -- addr ) \ gforth \G the code address of a @code{defer}ed word ['] source >code-address ; +[THEN] +doer? :dofield [IF] : dofield: ( -- addr ) \ gforth \G the code address of a @code{field} ['] reveal-method >code-address ; +[THEN] + +has-prims 0= [IF] +: dodoes: ( -- addr ) \ gforth + \G the code address of a @code{field} + ['] spaces >code-address ; +[THEN] NIL AConstant NIL \ gforth \ Aliases -' i Alias r@ +' i Alias r@ ( -- w ; R: w -- w ) \ core r-fetch +\G copy w from the return stack to the data stack \ Bit string manipulation 06oct92py @@ -96,8 +113,14 @@ NIL AConstant NIL \ gforth LOOP ; \ !! this is machine-dependent, but works on all but the strangest machines -' faligned Alias maxaligned ( addr1 -- addr2 ) \ gforth -' falign Alias maxalign ( -- ) \ gforth + +: maxaligned ( addr -- f-addr ) \ float + [ /maxalign 1 - ] Literal + [ 0 /maxalign - ] Literal and ; +: maxalign ( -- ) \ float + here dup maxaligned swap + ?DO + bl c, + LOOP ; \ !! machine-dependent and won't work if "0 >body" <> "0 >body maxaligned" ' maxaligned Alias cfaligned ( addr1 -- addr2 ) \ gforth @@ -242,7 +265,7 @@ Defer source ( -- addr count ) \ core : (compile) ( -- ) \ gforth r> dup cell+ >r @ compile, ; -: postpone, ( w xt -- ) +: postpone, ( w xt -- ) \ gforth postpone-comma \g Compiles the compilation semantics represented by @var{w xt}. dup ['] execute = if @@ -407,7 +430,7 @@ hex : #s ( +d -- 0 0 ) \ core number-sign-s BEGIN - # 2dup d0= + # 2dup or 0= UNTIL ; \ print numbers 07jun92py @@ -440,12 +463,13 @@ hex \ !! allow the user to add rollback actions anton \ !! use a separate exception stack? anton +has-locals [IF] : lp@ ( -- addr ) \ gforth l-p-fetch laddr# [ 0 , ] ; +[THEN] Defer 'catch Defer 'throw -Defer 'bounce ' noop IS 'catch ' noop IS 'throw @@ -453,8 +477,12 @@ Defer 'bounce : catch ( x1 .. xn xt -- y1 .. ym 0 / z1 .. zn error ) \ exception 'catch sp@ >r +[ has-floats [IF] ] fp@ >r +[ [THEN] ] +[ has-locals [IF] ] lp@ >r +[ [THEN] ] handler @ >r rp@ handler ! execute @@ -462,14 +490,22 @@ Defer 'bounce : throw ( y1 .. ym error/0 -- y1 .. ym / z1 .. zn error ) \ exception ?DUP IF - [ here 9 cells ! ] \ entry point for signal handler + [ has-header [IF] here 9 cells ! [THEN] ] \ entry point for signal handler handler @ dup 0= IF +[ has-os [IF] ] 2 (bye) +[ [ELSE] ] + quit +[ [THEN] ] THEN rp! r> handler ! - r> lp! +[ has-locals [IF] ] + r> lp! +[ [THEN] ] +[ has-floats [IF] ] r> fp! +[ [THEN] ] r> swap >r sp! drop r> 'throw THEN ; @@ -481,8 +517,12 @@ Defer 'bounce ?DUP IF handler @ rp! r> handler ! +[ has-locals [IF] ] r> lp! +[ [THEN] ] +[ has-floats [IF] ] rdrop +[ [THEN] ] rdrop 'throw THEN ; @@ -491,7 +531,10 @@ Defer 'bounce : ?stack ( ?? -- ?? ) \ gforth sp@ s0 @ u> IF -4 throw THEN - fp@ f0 @ u> IF -&45 throw THEN ; +[ has-floats [IF] ] + fp@ f0 @ u> IF -&45 throw THEN +[ [THEN] ] +; \ ?stack should be code -- it touches an empty stack! \ interpret 10mar92py @@ -705,12 +748,17 @@ Create ??? 0 , 3 c, char ? c, char ? c, : !does ( addr -- ) \ gforth store-does lastxt does-code! ; : (does>) ( R: addr -- ) - r> /does-handler + !does ; + r> cfaligned /does-handler + !does ; : dodoes, ( -- ) - here /does-handler allot does-handler! ; + cfalign here /does-handler allot does-handler! ; +doer? :dovar [IF] : Create ( "name" -- ) \ core Header reveal dovar: cfa, ; +[ELSE] +: Create ( "name" -- ) \ core + Header reveal here lastcfa ! 0 A, 0 , DOES> ; +[THEN] \ Create Variable User Constant 17mar93py @@ -718,15 +766,26 @@ Create ??? 0 , 3 c, char ? c, char ? c, Create 0 , ; : AVariable ( "name" -- ) \ gforth Create 0 A, ; -: 2VARIABLE ( "name" -- ) \ double +: 2Variable ( "name" -- ) \ double create 0 , 0 , ; - + +: uallot ( n -- ) udp @ swap udp +! ; + +doer? :douser [IF] : User ( "name" -- ) \ gforth - Variable ; + Header reveal douser: cfa, cell uallot , ; : AUser ( "name" -- ) \ gforth - AVariable ; - -: (Constant) Header reveal docon: cfa, ; + User ; +[ELSE] +: User Create uallot , DOES> @ up @ + ; +: AUser User ; +[THEN] + +doer? :docon [IF] + : (Constant) Header reveal docon: cfa, ; +[ELSE] + : (Constant) Create DOES> @ ; +[THEN] : Constant ( w "name" -- ) \ core \G Defines constant @var{name} \G @@ -734,6 +793,8 @@ Create ??? 0 , 3 c, char ? c, char ? c, (Constant) , ; : AConstant ( addr "name" -- ) \ gforth (Constant) A, ; +: Value ( w "name" -- ) \ core-ext + (Constant) , ; : 2Constant ( w1 w2 "name" -- ) \ double Create ( w1 w2 "name" -- ) @@ -741,16 +802,23 @@ Create ??? 0 , 3 c, char ? c, char ? c, DOES> ( -- w1 w2 ) 2@ ; +doer? :dofield [IF] + : (Field) Header reveal dofield: cfa, ; +[ELSE] + : (Field) Create DOES> @ + ; +[THEN] \ IS Defer What's Defers TO 24feb93py +doer? :dodefer [IF] : Defer ( "name" -- ) \ gforth \ !! shouldn't it be initialized with abort or something similar? Header Reveal dodefer: cfa, ['] noop A, ; -\ Create ( -- ) -\ ['] noop A, -\ DOES> ( ??? ) -\ perform ; +[ELSE] +: Defer ( "name" -- ) \ gforth + Create ['] noop A, +DOES> @ execute ; +[THEN] : Defers ( "name" -- ) \ gforth ' >body @ compile, ; immediate @@ -894,7 +962,7 @@ end-struct interpret/compile-struct then then ; -: find ( c-addr -- xt +-1 / c-addr 0 ) \ core +: find ( c-addr -- xt +-1 / c-addr 0 ) \ core,search dup count sfind dup if rot drop @@ -970,7 +1038,10 @@ G -1 warnings T ! 0C constant #ff ( -- c ) \ gforth 0A constant #lf ( -- c ) \ gforth -: bell #bell emit ; +: bell ( -- ) \ gforth + \g makes a beep and flushes the output buffer + #bell emit + outfile-id flush-file drop ; : cr ( -- ) \ core \ emit a newline #lf ( sic! ) emit ; @@ -983,7 +1054,7 @@ G -1 warnings T ! dup IF #bs emit bl emit #bs emit 1- rot 1- -rot THEN false ; -: (ret) true space ; +: (ret) true bl emit ; Create ctrlkeys ] false false false false false false false false @@ -1006,25 +1077,26 @@ defer everychar : accept ( addr len -- len ) \ core dup 0< IF abs over dup 1 chars - c@ tuck type \ this allows to edit given strings - ELSE 0 THEN rot over + ELSE 0 THEN rot over BEGIN key decode UNTIL 2drop nip ; \ Output 13feb93py +has-os [IF] +0 Value outfile-id ( -- file-id ) \ gforth + : (type) ( c-addr u -- ) \ gforth outfile-id write-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? ; -Defer type ( c-addr u -- ) \ core -\ defer type for a output buffer or fast -\ screen write - -' (type) IS Type - : (emit) ( c -- ) \ gforth outfile-id emit-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? ; +[THEN] + +Defer type ( c-addr u -- ) \ core +' (type) IS Type Defer emit ( c -- ) \ core ' (Emit) IS Emit @@ -1034,14 +1106,23 @@ Defer key ( -- c ) \ core \ Query 07apr93py +has-files 0= [IF] +: sourceline# ( -- n ) loadline @ ; +[THEN] + : refill ( -- flag ) \ core-ext,block-ext,file-ext blk @ IF 1 blk +! true 0 >in ! EXIT THEN tib /line +[ has-files [IF] ] loadfile @ ?dup IF read-line throw - ELSE sourceline# 0< IF 2drop false EXIT THEN - accept true + ELSE +[ [THEN] ] + sourceline# 0< IF 2drop false EXIT THEN + accept true +[ has-files [IF] ] THEN +[ [THEN] ] 1 loadline +! swap #tib ! 0 >in ! ; @@ -1052,6 +1133,7 @@ Defer key ( -- c ) \ core \ save-mem extend-mem +has-os [IF] : save-mem ( addr1 u -- addr2 u ) \ gforth \g copy a memory block into a newly allocated region in the heap swap >r @@ -1063,6 +1145,7 @@ Defer key ( -- c ) \ core \ the (possibly reallocated piece is addr2 u2, the extension is at addr over >r + dup >r resize throw r> over r> + -rot ; +[THEN] \ HEX DECIMAL 2may93jaw @@ -1096,6 +1179,17 @@ Defer key ( -- c ) \ core \ EVALUATE 17may93jaw +has-files 0= [IF] +: push-file ( -- ) r> + sourceline# >r tibstack @ >r >tib @ >r #tib @ >r + >tib @ tibstack @ = IF r@ tibstack +! THEN + tibstack @ >tib ! >in @ >r >r ; + +: pop-file ( throw-code -- throw-code ) + r> + r> >in ! r> #tib ! r> >tib ! r> tibstack ! r> loadline ! >r ; +[THEN] + : evaluate ( c-addr len -- ) \ core,block push-file #tib ! >tib ! >in off blk off loadfile off -1 loadline ! @@ -1115,7 +1209,7 @@ Defer .status : prompt state @ IF ." compiled" EXIT THEN ." ok" ; : (Query) ( -- ) loadfile off blk off refill drop ; -: (quit) BEGIN .status cr (query) interpret prompt AGAIN ; +: (quit) BEGIN .status cr (query) interpret prompt AGAIN ; ' (quit) IS 'quit \ DOERROR (DOERROR) 13jun93jaw @@ -1171,6 +1265,10 @@ DEFER DOERROR ; : (DoError) ( throw-code -- ) + [ has-os [IF] ] + outfile-id dup flush-file drop >r + stderr to outfile-id + [ [THEN] ] sourceline# IF source >in @ sourceline# 0 0 .error-frame THEN @@ -1192,7 +1290,9 @@ DEFER DOERROR ELSE .error THEN - normal-dp dpp ! ; + normal-dp dpp ! + [ has-os [IF] ] r> to outfile-id [ [THEN] ] +; ' (DoError) IS DoError @@ -1211,24 +1311,32 @@ DEFER DOERROR \ : .name ( name -- ) name>string type space ; \ : words listwords @ \ BEGIN @ dup WHILE dup .name REPEAT drop ; -Defer 'cold ' noop IS 'cold +Defer 'cold ( -- ) \ gforth tick-cold +\ hook (deferred word) for things to do right before interpreting the +\ command-line arguments +' noop IS 'cold : cold ( -- ) \ gforth - stdout TO outfile-id +[ has-files [IF] ] pathstring 2@ process-path pathdirs 2! init-included-files +[ [THEN] ] 'cold - argc @ 1 > +[ has-files [IF] ] + ['] process-args catch ?dup IF - ['] process-args catch ?dup - IF - dup >r DoError cr r> negate (bye) - THEN + dup >r DoError cr r> negate (bye) + THEN + argc @ 1 > + IF \ there may be some unfinished line, so let's finish it cr THEN +[ [THEN] ] ." GForth " version-string type ." , Copyright (C) 1994-1996 Free Software Foundation, Inc." cr - ." GForth comes with ABSOLUTELY NO WARRANTY; for details type `license'" cr - ." Type `bye' to exit" + ." GForth comes with ABSOLUTELY NO WARRANTY; for details type `license'" +[ has-os [IF] ] + cr ." Type `bye' to exit" +[ [THEN] ] loadline off quit ; : license ( -- ) \ gforth @@ -1248,16 +1356,43 @@ Defer 'cold ' noop IS 'cold ." Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA." cr ; : boot ( path **argv argc -- ) - argc ! argv ! pathstring 2! main-task up! - sp@ s0 ! - lp@ forthstart 7 cells + @ - dup >tib ! tibstack ! #tib off >in off - rp@ r0 ! - fp@ f0 ! - ['] cold catch DoError - bye ; + main-task up! +[ has-os [IF] ] + stdout TO outfile-id +[ [THEN] ] +[ has-files [IF] ] + argc ! argv ! pathstring 2! +[ [THEN] ] + sp@ s0 ! +[ has-locals [IF] ] + lp@ forthstart 7 cells + @ - +[ [ELSE] ] + [ has-os [IF] ] + sp@ $1040 + + [ [ELSE] ] + sp@ $40 + + [ [THEN] ] +[ [THEN] ] + dup >tib ! tibstack ! #tib off >in off + rp@ r0 ! +[ has-floats [IF] ] + fp@ f0 ! +[ [THEN] ] + ['] cold catch DoError +[ has-os [IF] ] + bye +[ [THEN] ] +; +has-os [IF] : bye ( -- ) \ tools-ext - script? 0= IF cr THEN 0 (bye) ; +[ has-files [IF] ] + script? 0= IF cr THEN +[ [ELSE] ] + cr +[ [THEN] ] + 0 (bye) ; +[THEN] \ **argv may be scanned by the C starter to get some important \ information, as -display and -geometry for an X client FORTH