Powered by ViewCVS 1.0-dev
renamed 00-readme files to README added scripts elisp-comp and missing removed kernel/interp.fs (should have been removed in mega-patch) added make rule for doc/gforth.txt renamed PARSE-WORD into SWORD (PARSE-WORD is used with the meaning of NAME in OpenBoot and dpans6 A.6.2.2008)
\ definitions needed for interpreter / compiler only
\ here allot , c, A, 17dec92py
: allot ( n -- ) \ core
dup unused u> -8 and throw
dp +! ;
: c, ( c -- ) \ core
here 1 chars allot c! ;
: , ( x -- ) \ core
here cell allot ! ;
: 2, ( w1 w2 -- ) \ gforth
here 2 cells allot 2! ;
\ : aligned ( addr -- addr' ) \ core
\ [ cell 1- ] Literal + [ -1 cells ] Literal and ;
: align ( -- ) \ core
here dup aligned swap ?DO bl c, LOOP ;
\ : faligned ( addr -- f-addr ) \ float
\ [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
: falign ( -- ) \ float
here dup faligned swap
?DO
bl c,
LOOP ;
: maxalign ( -- ) \ float
here dup maxaligned swap
?DO
bl c,
LOOP ;
\ the code field is aligned if its body is maxaligned
' maxalign Alias cfalign ( -- ) \ gforth
' , alias A, ( addr -- ) \ gforth
' NOOP ALIAS const
\ name> found 17dec92py
$80 constant alias-mask \ set when the word is not an alias!
$40 constant immediate-mask
$20 constant restrict-mask
: ((name>)) ( nfa -- cfa )
name>string + cfaligned ;
: (name>x) ( nfa -- cfa b )
\ cfa is an intermediate cfa and b is the flags byte of nfa
dup ((name>))
swap cell+ c@ dup alias-mask and 0=
IF
swap @ swap
THEN ;
\ input stream primitives 23feb93py
: tib ( -- c-addr ) \ core-ext
\ obsolescent
>tib @ ;
Defer source ( -- addr count ) \ core
\ used by dodefer:, must be defer
: (source) ( -- addr count )
tib #tib @ ;
' (source) IS source
: (word) ( addr1 n1 char -- addr2 n2 )
dup >r skip 2dup r> scan nip - ;
\ (word) should fold white spaces
\ this is what (parse-white) does
\ word parse 23feb93py
: parse-word ( char -- addr len ) \ gforth
source 2dup >r >r >in @ over min /string
rot dup bl = IF drop (parse-white) ELSE (word) THEN
2dup + r> - 1+ r> min >in ! ;
: word ( char -- addr ) \ core
parse-word here place bl here count + c! here ;
: parse ( char -- addr len ) \ core-ext
>r source >in @ over min /string over swap r> scan >r
over - dup r> IF 1+ THEN >in +! ;
\ name 13feb93py
: capitalize ( addr len -- addr len ) \ gforth
2dup chars chars bounds
?DO I c@ toupper I c! 1 chars +LOOP ;
[IFUNDEF] (name) \ name might be a primitive
: (name) ( -- c-addr count )
source 2dup >r >r >in @ /string (parse-white)
2dup + r> - 1+ r> min >in ! ;
\ name count ;
[THEN]
: name-too-short? ( c-addr u -- c-addr u )
dup 0= -&16 and throw ;
: name-too-long? ( c-addr u -- c-addr u )
dup $1F u> -&19 and throw ;
\ Literal 17dec92py
: Literal ( compilation n -- ; run-time -- n ) \ core
postpone lit , ; immediate restrict
: ALiteral ( compilation addr -- ; run-time -- addr ) \ gforth
postpone lit A, ; immediate restrict
: char ( 'char' -- n ) \ core
bl word char+ c@ ;
: [char] ( compilation 'char' -- ; run-time -- n )
char postpone Literal ; immediate restrict
\ threading 17mar93py
: cfa, ( code-address -- ) \ gforth cfa-comma
here
dup lastcfa !
0 A, 0 , code-address! ;
: compile, ( xt -- ) \ core-ext compile-comma
A, ;
: !does ( addr -- ) \ gforth store-does
lastxt does-code! ;
: (does>) ( R: addr -- )
r> cfaligned /does-handler + !does ;
: dodoes, ( -- )
cfalign here /does-handler allot does-handler! ;
: (compile) ( -- ) \ gforth
r> dup cell+ >r @ compile, ;
: postpone, ( w xt -- )
\g Compiles the compilation semantics represented by @var{w xt}.
dup ['] execute =
if
drop compile,
else
dup ['] compile, =
if
drop POSTPONE (compile) compile,
else
swap POSTPONE aliteral compile,
then
then ;
: POSTPONE ( "name" -- ) \ core
\g Compiles the compilation semantics of @var{name}.
COMP' postpone, ; immediate restrict
: interpret/compile: ( interp-xt comp-xt "name" -- ) \ gforth
Create immediate swap A, A,
DOES>
abort" executed primary cfa of an interpret/compile: word" ;
\ state @ IF cell+ THEN perform ;
\ number? number 23feb93py
hex
const Create bases 10 , 2 , A , 100 ,
\ 16 2 10 character
\ !! this saving and restoring base is an abomination! - anton
: getbase ( addr u -- addr' u' )
over c@ [char] $ - dup 4 u<
IF
cells bases + @ base ! 1 /string
ELSE
drop
THEN ;
: s>number ( addr len -- d )
base @ >r dpl on
over c@ '- = dup >r
IF
1 /string
THEN
getbase dpl on 0 0 2swap
BEGIN
dup >r >number dup
WHILE
dup r> -
WHILE
dup dpl ! over c@ [char] . =
WHILE
1 /string
REPEAT THEN
2drop rdrop dpl off
ELSE
2drop rdrop r>
IF
dnegate
THEN
THEN
r> base ! ;
: snumber? ( c-addr u -- 0 / n -1 / d 0> )
s>number dpl @ 0=
IF
2drop false EXIT
THEN
dpl @ dup 0> 0= IF
nip
THEN ;
: number? ( string -- string 0 / n -1 / d 0> )
dup >r count snumber? dup if
rdrop
else
r> swap
then ;
: number ( string -- d )
number? ?dup 0= abort" ?" 0<
IF
s>d
THEN ;
\ interpret 10mar92py
Defer parser
Defer name ( -- c-addr count ) \ gforth
\ get the next word from the input buffer
' (name) IS name
Defer compiler-notfound ( c-addr count -- )
Defer interpreter-notfound ( c-addr count -- )
: no.extensions ( addr u -- )
2drop -&13 bounce ;
' no.extensions IS compiler-notfound
' no.extensions IS interpreter-notfound
: compile-only-error ( ... -- )
-&14 throw ;
: interpret ( ?? -- ?? ) \ gforth
\ interpret/compile the (rest of the) input buffer
BEGIN
?stack name dup
WHILE
parser
REPEAT
2drop ;
\ interpreter compiler 30apr92py
\ not the most efficient implementations of interpreter and compiler
: interpreter ( c-addr u -- )
2dup find-name dup
if
nip nip name>int execute
else
drop
2dup 2>r snumber?
IF
2rdrop
ELSE
2r> interpreter-notfound
THEN
then ;
: compiler ( c-addr u -- )
2dup find-name dup
if ( c-addr u nt )
nip nip name>comp execute
else
drop
2dup snumber? dup
IF
0>
IF
swap postpone Literal
THEN
postpone Literal
2drop
ELSE
drop compiler-notfound
THEN
then ;
' interpreter IS parser
: [ ( -- ) \ core left-bracket
['] interpreter IS parser state off ; immediate
: ] ( -- ) \ core right-bracket
['] compiler IS parser state on ;
\ Strings 22feb93py
: ," ( "string"<"> -- ) [char] " parse
here over char+ allot place align ;
: SLiteral ( Compilation c-addr1 u ; run-time -- c-addr2 u ) \ string
postpone (S") here over char+ allot place align ;
immediate restrict
: ( ( compilation 'ccc<close-paren>' -- ; run-time -- ) \ core,file paren
[char] ) parse 2drop ; immediate
: \ ( -- ) \ core-ext backslash
blk @
IF
>in @ c/l / 1+ c/l * >in !
EXIT
THEN
source >in ! drop ; immediate
: \G ( -- ) \ gforth backslash
POSTPONE \ ; immediate
\ error handling 22feb93py
\ 'abort thrown out! 11may93jaw
: abort" ( compilation 'ccc"' -- ; run-time f -- ) \ core,exception-ext abort-quote
postpone (abort") ," ; immediate restrict
\ Header states 23feb93py
: cset ( bmask c-addr -- )
tuck c@ or swap c! ;
: creset ( bmask c-addr -- )
tuck c@ swap invert and swap c! ;
: ctoggle ( bmask c-addr -- )
tuck c@ xor swap c! ;
: lastflags ( -- c-addr )
\ the address of the flags byte in the last header
\ aborts if the last defined word was headerless
last @ dup 0= abort" last word was headerless" cell+ ;
: immediate ( -- ) \ core
immediate-mask lastflags cset ;
: restrict ( -- ) \ gforth
restrict-mask lastflags cset ;
' restrict alias compile-only ( -- ) \ gforth
\ Header 23feb93py
\ input-stream, nextname and noname are quite ugly (passing
\ information through global variables), but they are useful for dealing
\ with existing/independent defining words
defer (header)
defer header ( -- ) \ gforth
' (header) IS header
: string, ( c-addr u -- ) \ gforth
\G puts down string as cstring
dup c, here swap chars dup allot move ;
: header, ( c-addr u -- ) \ gforth
name-too-long?
align here last !
current @ 1 or A, \ link field; before revealing, it contains the
\ tagged reveal-into wordlist
string, cfalign
alias-mask lastflags cset ;
: input-stream-header ( "name" -- )
name name-too-short? header, ;
: input-stream ( -- ) \ general
\G switches back to getting the name from the input stream ;
['] input-stream-header IS (header) ;
' input-stream-header IS (header)
\ !! make that a 2variable
create nextname-buffer 32 chars allot
: nextname-header ( -- )
nextname-buffer count header,
input-stream ;
\ the next name is given in the string
: nextname ( c-addr u -- ) \ gforth
name-too-long?
nextname-buffer c! ( c-addr )
nextname-buffer count move
['] nextname-header IS (header) ;
: noname-header ( -- )
0 last ! cfalign
input-stream ;
: noname ( -- ) \ gforth
\ the next defined word remains anonymous. The xt of that word is given by lastxt
['] noname-header IS (header) ;
: lastxt ( -- xt ) \ gforth
\ xt is the execution token of the last word defined. The main purpose of this word is to get the xt of words defined using noname
lastcfa @ ;
: Alias ( cfa "name" -- ) \ gforth
Header reveal
alias-mask lastflags creset
dup A, lastcfa ! ;
: name>string ( nt -- addr count ) \ gforth name-to-string
\g @var{addr count} is the name of the word represented by @var{nt}.
cell+ count $1F and ;
: head>string
cell+ count $1F and ;
const Create ??? 0 , 3 c, char ? c, char ? c, char ? c,
\ ??? is used by dovar:, must be created/:dovar
: >head ( cfa -- nt ) \ gforth to-name
$21 cell do
dup i - count $9F and + cfaligned over alias-mask + = if
i - cell - unloop exit
then
cell +loop
drop ??? ( wouldn't 0 be better? ) ;
' >head ALIAS >name
: body> 0 >body - ;
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
: Variable ( "name" -- ) \ core
Create 0 , ;
: AVariable ( "name" -- ) \ gforth
Create 0 A, ;
: 2Variable ( "name" -- ) \ double
create 0 , 0 , ;
: uallot ( n -- ) udp @ swap udp +! ;
doer? :douser [IF]
: User ( "name" -- ) \ gforth
Header reveal douser: cfa, cell uallot , ;
: AUser ( "name" -- ) \ gforth
User ;
[ELSE]
: User Create cell 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
\G @var{name} execution: @var{-- w}
(Constant) , ;
: AConstant ( addr "name" -- ) \ gforth
(Constant) A, ;
: Value ( w "name" -- ) \ core-ext
(Constant) , ;
: 2Constant ( w1 w2 "name" -- ) \ double
Create ( w1 w2 "name" -- )
2,
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, ;
[ELSE]
: Defer ( "name" -- ) \ gforth
Create ['] noop A,
DOES> @ execute ;
[THEN]
: Defers ( "name" -- ) \ gforth
' >body @ compile, ; immediate
\ : ; 24feb93py
defer :-hook ( sys1 -- sys2 )
defer ;-hook ( sys2 -- sys1 )
: : ( "name" -- colon-sys ) \ core colon
Header docol: cfa, defstart ] :-hook ;
: ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon
;-hook ?struc postpone exit reveal postpone [ ; immediate restrict
: :noname ( -- xt colon-sys ) \ core-ext colon-no-name
0 last !
cfalign here docol: cfa, 0 ] :-hook ;
\ Search list handling 23feb93py
: last? ( -- false / nfa nfa )
last @ ?dup ;
: (reveal) ( nt wid -- )
( wid>wordlist-id ) dup >r
@ over ( name>link ) !
r> ! ;
\ object oriented search list 17mar93py
\ word list structure:
struct
cell% field find-method \ xt: ( c_addr u wid -- nt )
cell% field reveal-method \ xt: ( nt wid -- ) \ used by dofield:, must be field
cell% field rehash-method \ xt: ( wid -- ) \ re-initializes a "search-data" (hashtables)
cell% field hash-method \ xt: ( wid -- ) \ initializes ""
\ \ !! what else
end-struct wordlist-map-struct
struct
cell% field wordlist-id \ not the same as wid; representation depends on implementation
cell% field wordlist-map \ pointer to a wordlist-map-struct
cell% field wordlist-link \ link field to other wordlists
cell% field wordlist-extend \ points to wordlist extensions (eg hashtables)
end-struct wordlist-struct
: f83find ( addr len wordlist -- nt / false )
( wid>wordlist-id ) @ (f83find) ;
: initvoc ( wid -- )
dup wordlist-map @ hash-method perform ;
\ Search list table: find reveal
Create f83search ( -- wordlist-map )
' f83find A, ' (reveal) A, ' drop A, ' drop A,
here NIL A, G f83search T A, NIL A, NIL A,
AValue forth-wordlist \ variable, will be redefined by search.fs
AVariable lookup forth-wordlist lookup !
\ !! last is user and lookup?! jaw
AVariable current ( -- addr ) \ gforth
AVariable voclink forth-wordlist wordlist-link voclink !
lookup AValue context
forth-wordlist current !
\ higher level parts of find
struct
>body
cell% field interpret/compile-int
cell% field interpret/compile-comp
end-struct interpret/compile-struct
: (cfa>int) ( cfa -- xt )
dup interpret/compile?
if
interpret/compile-int @
then ;
: (x>int) ( cfa b -- xt )
\ get interpretation semantics of name
restrict-mask and
if
drop ['] compile-only-error
else
(cfa>int)
then ;
: name>int ( nt -- xt ) \ gforth
\G @var{xt} represents the interpretation semantics of the word
\G @var{nt}. Produces @code{' compile-only-error} if
\G @var{nt} is compile-only.
(name>x) (x>int) ;
: name?int ( nt -- xt ) \ gforth
\G Like name>int, but throws an error if compile-only.
(name>x) restrict-mask and
if
compile-only-error \ does not return
then
(cfa>int) ;
: name>comp ( nt -- w xt ) \ gforth
\G @var{w xt} is the compilation token for the word @var{nt}.
(name>x) >r dup interpret/compile?
if
interpret/compile-comp @
then
r> immediate-mask and if
['] execute
else
['] compile,
then ;
: (search-wordlist) ( addr count wid -- nt / false )
dup wordlist-map @ find-method perform ;
: flag-sign ( f -- 1|-1 )
\ true becomes 1, false -1
0= 2* 1+ ;
: (name>intn) ( nfa -- xt +-1 )
(name>x) tuck (x>int) ( b xt )
swap immediate-mask and flag-sign ;
: search-wordlist ( addr count wid -- 0 / xt +-1 ) \ search
\ xt is the interpretation semantics
(search-wordlist) dup if
(name>intn)
then ;
: find-name ( c-addr u -- nt/0 ) \ gforth
\g Find the name @var{c-addr u} in the current search
\g order. Return its nt, if found, otherwise 0.
lookup @ (search-wordlist) ;
: sfind ( c-addr u -- 0 / xt +-1 ) \ gforth-obsolete
find-name dup
if ( nt )
state @
if
name>comp ['] execute = flag-sign
else
(name>intn)
then
then ;
: find ( c-addr -- xt +-1 / c-addr 0 ) \ core,search
dup count sfind dup
if
rot drop
then ;
: (') ( "name" -- nt ) \ gforth
name find-name dup 0=
IF
drop -&13 bounce
THEN ;
: [(')] ( compilation "name" -- ; run-time -- nt ) \ gforth bracket-paren-tick
(') postpone ALiteral ; immediate restrict
: ' ( "name" -- xt ) \ core tick
\g @var{xt} represents @var{name}'s interpretation
\g semantics. Performs @code{-14 throw} if the word has no
\g interpretation semantics.
(') name?int ;
: ['] ( compilation. "name" -- ; run-time. -- xt ) \ core bracket-tick
\g @var{xt} represents @var{name}'s interpretation
\g semantics. Performs @code{-14 throw} if the word has no
\g interpretation semantics.
' postpone ALiteral ; immediate restrict
: COMP' ( "name" -- w xt ) \ gforth c-tick
\g @var{w xt} represents @var{name}'s compilation semantics.
(') name>comp ;
: [COMP'] ( compilation "name" -- ; run-time -- w xt ) \ gforth bracket-comp-tick
\g @var{w xt} represents @var{name}'s compilation semantics.
COMP' swap POSTPONE Aliteral POSTPONE ALiteral ; immediate restrict
\ reveal words
Variable warnings ( -- addr ) \ gforth
G -1 warnings T !
: check-shadow ( addr count wid -- )
\G prints a warning if the string is already present in the wordlist
>r 2dup 2dup r> (search-wordlist) warnings @ and ?dup if
." redefined " name>string 2dup type
compare 0<> if
." with " type
else
2drop
then
space space EXIT
then
2drop 2drop ;
: reveal ( -- ) \ gforth
last?
if \ the last word has a header
dup ( name>link ) @ 1 and
if \ it is still hidden
dup ( name>link ) @ 1 xor ( nt wid )
2dup >r name>string r> check-shadow ( nt wid )
dup wordlist-map @ reveal-method perform
else
drop
then
then ;
: rehash ( wid -- )
dup wordlist-map @ rehash-method perform ;
\ Query 07apr93py
has? file 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? file [IF] ]
loadfile @ ?dup
IF read-line throw
ELSE
[ [THEN] ]
sourceline# 0< IF 2drop false EXIT THEN
accept true
[ has? file [IF] ]
THEN
[ [THEN] ]
1 loadline +!
swap #tib ! 0 >in ! ;
: query ( -- ) \ core-ext
\G obsolescent
blk off loadfile off
tib /line accept #tib ! 0 >in ! ;
\ 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
dup allocate throw
swap 2dup r> -rot move ;
: extend-mem ( addr1 u1 u -- addr addr2 u2 )
\ extend memory block allocated from the heap by u aus
\ the (possibly reallocated piece is addr2 u2, the extension is at addr
over >r + dup >r resize throw
r> over r> + -rot ;
[THEN]
\ RECURSE 17may93jaw
: recurse ( compilation -- ; run-time ?? -- ?? ) \ core
\g calls the current definition.
lastxt compile, ; immediate restrict
' reveal alias recursive ( compilation -- ; run-time -- ) \ gforth
\g makes the current definition visible, enabling it to call itself
\g recursively.
immediate restrict
\ EVALUATE 17may93jaw
has? file 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 !
['] interpret catch
pop-file throw ;
: abort ( ?? -- ?? ) \ core,exception-ext
-1 throw ;
\+ environment? true ENV" CORE"
\ core wordset is now complete!
\ Quit 13feb93py
Defer 'quit
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) IS 'quit
\ DOERROR (DOERROR) 13jun93jaw
8 Constant max-errors
Variable error-stack 0 error-stack !
max-errors 6 * cells allot
\ format of one cell:
\ source ( addr u )
\ >in
\ line-number
\ Loadfilename ( addr u )
: dec. ( n -- ) \ gforth
\ print value in decimal representation
base @ decimal swap . base ! ;
: hex. ( u -- ) \ gforth
\ print value as unsigned hex number
'$ emit base @ swap hex u. base ! ;
: typewhite ( addr u -- ) \ gforth
\ like type, but white space is printed instead of the characters
bounds ?do
i c@ #tab = if \ check for tab
#tab
else
bl
then
emit
loop ;
DEFER DOERROR
: .error-frame ( addr1 u1 n1 n2 addr2 u2 -- )
cr error-stack @
IF
." in file included from "
type ." :" dec. drop 2drop
ELSE
type ." :" dec.
cr dup 2over type cr drop
nip -trailing 1- ( line-start index2 )
0 >r BEGIN
2dup + c@ bl > WHILE
r> 1+ >r 1- dup 0< UNTIL THEN 1+
( line-start index1 )
typewhite
r> 1 max 0 ?do \ we want at least one "^", even if the length is 0
[char] ^ emit
loop
THEN
;
: (DoError) ( throw-code -- )
[ has? os [IF] ]
outfile-id dup flush-file drop >r
stderr to outfile-id
[ [THEN] ]
sourceline# 0> IF
source >in @ sourceline# 0 0 .error-frame
THEN
error-stack @ 0 ?DO
-1 error-stack +!
error-stack dup @ 6 * cells + cell+
6 cells bounds DO
I @
cell +LOOP
.error-frame
LOOP
dup -2 =
IF
"error @ ?dup
IF
cr count type
THEN
drop
ELSE
.error
THEN
normal-dp dpp !
[ has? os [IF] ] r> to outfile-id [ [THEN] ]
;
' (DoError) IS DoError
: quit ( ?? -- ?? ) \ core
rp0 @ rp! handler off >tib @ >r
BEGIN
postpone [
['] 'quit CATCH dup
WHILE
DoError r@ >tib ! r@ tibstack !
REPEAT
drop r> >tib ! ;
\ Cold 13feb93py
\ : .name ( name -- ) name>string type space ;
\ : words listwords @
\ BEGIN @ dup WHILE dup .name REPEAT drop ;
: (bootmessage)
." GForth " version-string type
." , Copyright (C) 1994-1997 Free Software Foundation, Inc." cr
." GForth comes with ABSOLUTELY NO WARRANTY; for details type `license'"
[ has? os [IF] ]
cr ." Type `bye' to exit"
[ [THEN] ] ;
defer bootmessage
defer process-args
' (bootmessage) IS bootmessage
Defer 'cold
\ hook (deferred word) for things to do right before interpreting the
\ command-line arguments
' noop IS 'cold
include chains.fs
Variable init8
: cold ( -- ) \ gforth
[ has? file [IF] ]
pathstring 2@ fpath only-path
init-included-files
[ [THEN] ]
'cold
init8 chainperform
[ has? file [IF] ]
['] process-args catch ?dup
IF
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] ]
bootmessage
loadline off quit ;
: boot ( path **argv argc -- )
main-task up!
[ has? os [IF] ]
stdout TO outfile-id
[ [THEN] ]
[ has? file [IF] ]
argc ! argv ! pathstring 2!
[ [THEN] ]
sp@ sp0 !
[ has? glocals [IF] ]
lp@ forthstart 7 cells + @ -
[ [ELSE] ]
[ has? os [IF] ]
sp@ $1040 +
[ [ELSE] ]
sp@ $40 +
[ [THEN] ]
[ [THEN] ]
dup >tib ! tibstack ! #tib off >in off
rp@ rp0 !
[ has? floating [IF] ]
fp@ fp0 !
[ [THEN] ]
['] cold catch DoError cr
[ has? os [IF] ]
bye
[ [THEN] ]
;
has? os [IF]
: bye ( -- ) \ tools-ext
[ has? file [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
\ or space and stackspace overrides
\ 0 arg contains, however, the name of the program.
|
CVS Admin Powered by ViewCVS 1.0-dev |
ViewCVS and CVS Help |