version 1.16, 1994/08/31 16:37:48
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version 1.32, 1995/03/13 09:17:31
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Line 1
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Line 1
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\ KERNAL.FS ANS figFORTH kernal 17dec92py |
\ KERNAL.FS GNU FORTH kernal 17dec92py |
\ $ID: |
\ $ID: |
\ Idea and implementation: Bernd Paysan (py) |
\ Idea and implementation: Bernd Paysan (py) |
\ Copyright 1992 by the ANSI figForth Development Group |
\ Copyright 1992 by the ANSI figForth Development Group |
Line 66 DOES> ( n -- ) + c@ ;
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Line 66 DOES> ( n -- ) + c@ ;
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bl c, |
bl c, |
LOOP ; |
LOOP ; |
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\ !! this is machine-dependent, but works on all but the strangest machines |
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' faligned Alias maxaligned |
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' falign Alias maxalign |
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\ the code field is aligned if its body is maxaligned |
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\ !! machine-dependent and won't work if "0 >body" <> "0 >body maxaligned" |
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' maxaligned Alias cfaligned |
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' maxalign Alias cfalign |
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: chars ; immediate |
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: A! ( addr1 addr2 -- ) dup relon ! ; |
: A! ( addr1 addr2 -- ) dup relon ! ; |
: A, ( addr -- ) here cell allot A! ; |
: A, ( addr -- ) here cell allot A! ; |
Line 78 DOES> ( n -- ) + c@ ;
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Line 87 DOES> ( n -- ) + c@ ;
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\ name> found 17dec92py |
\ name> found 17dec92py |
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: (name>) ( nfa -- cfa ) count $1F and + aligned ; |
: (name>) ( nfa -- cfa ) |
: name> ( nfa -- cfa ) cell+ |
count $1F and + cfaligned ; |
dup (name>) swap c@ $80 and 0= IF @ THEN ; |
: name> ( nfa -- cfa ) |
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cell+ |
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dup (name>) swap c@ $80 and 0= IF @ THEN ; |
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: found ( nfa -- cfa n ) cell+ |
: found ( nfa -- cfa n ) cell+ |
dup c@ >r (name>) r@ $80 and 0= IF @ THEN |
dup c@ >r (name>) r@ $80 and 0= IF @ THEN |
Line 110 Defer source
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Line 121 Defer source
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\ (word) 22feb93py |
\ (word) 22feb93py |
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: scan ( addr1 n1 char -- addr2 n2 ) >r |
: scan ( addr1 n1 char -- addr2 n2 ) |
BEGIN dup WHILE over c@ r@ <> WHILE 1 /string |
\ skip all characters not equal to char |
REPEAT THEN rdrop ; |
>r |
: skip ( addr1 n1 char -- addr2 n2 ) >r |
BEGIN |
BEGIN dup WHILE over c@ r@ = WHILE 1 /string |
dup |
REPEAT THEN rdrop ; |
WHILE |
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over c@ r@ <> |
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WHILE |
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1 /string |
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REPEAT THEN |
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rdrop ; |
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: skip ( addr1 n1 char -- addr2 n2 ) |
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\ skip all characters equal to char |
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>r |
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BEGIN |
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dup |
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WHILE |
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over c@ r@ = |
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WHILE |
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1 /string |
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REPEAT THEN |
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rdrop ; |
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: (word) ( addr1 n1 char -- addr2 n2 ) |
: (word) ( addr1 n1 char -- addr2 n2 ) |
dup >r skip 2dup r> scan nip - ; |
dup >r skip 2dup r> scan nip - ; |
Line 138 Defer source
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Line 165 Defer source
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\ name 13feb93py |
\ name 13feb93py |
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: capitalize ( addr -- addr ) |
: capitalize ( addr len -- addr len ) |
dup count chars bounds |
2dup chars chars bounds |
?DO I c@ toupper I c! 1 chars +LOOP ; |
?DO I c@ toupper I c! 1 chars +LOOP ; |
: (name) ( -- addr ) bl word ; |
: (name) ( -- c-addr count ) |
: sname ( -- c-addr count ) |
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source 2dup >r >r >in @ /string (parse-white) |
source 2dup >r >r >in @ /string (parse-white) |
2dup + r> - 1+ r> min >in ! ; |
2dup + r> - 1+ r> min >in ! ; |
\ name count ; |
\ name count ; |
Line 158 Defer source
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Line 184 Defer source
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: [char] ( 'char' -- n ) char postpone Literal ; immediate |
: [char] ( 'char' -- n ) char postpone Literal ; immediate |
' [char] Alias Ascii immediate |
' [char] Alias Ascii immediate |
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: (compile) ( -- ) r> dup cell+ >r @ A, ; |
: (compile) ( -- ) r> dup cell+ >r @ compile, ; |
: postpone ( "name" -- ) |
: postpone ( "name" -- ) |
name find dup 0= abort" Can't compile " |
name sfind dup 0= abort" Can't compile " |
0> IF A, ELSE postpone (compile) A, THEN ; |
0> IF compile, ELSE postpone (compile) A, THEN ; |
immediate restrict |
immediate restrict |
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\ Use (compile) for the old behavior of compile! |
\ Use (compile) for the old behavior of compile! |
Line 229 decimal
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Line 255 decimal
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Create spaces bl 80 times \ times from target compiler! 11may93jaw |
Create spaces bl 80 times \ times from target compiler! 11may93jaw |
DOES> ( u -- ) swap |
DOES> ( u -- ) swap |
0 max 0 ?DO I' I - &80 min 2dup type +LOOP drop ; |
0 max 0 ?DO I' I - &80 min 2dup type +LOOP drop ; |
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Create backspaces 08 80 times \ times from target compiler! 11may93jaw |
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DOES> ( u -- ) swap |
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0 max 0 ?DO I' I - &80 min 2dup type +LOOP drop ; |
hex |
hex |
: space 1 spaces ; |
: space 1 spaces ; |
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Line 326 Defer notfound ( c-addr count -- )
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Line 355 Defer notfound ( c-addr count -- )
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: interpret |
: interpret |
BEGIN |
BEGIN |
?stack sname dup |
?stack name dup |
WHILE |
WHILE |
parser |
parser |
REPEAT |
REPEAT |
2drop ; |
2drop ; |
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\ sinterpreter scompiler 30apr92py |
\ interpreter compiler 30apr92py |
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: sinterpreter ( c-addr u -- ) |
: interpreter ( c-addr u -- ) |
\ interpretation semantics for the name/number c-addr u |
\ interpretation semantics for the name/number c-addr u |
2dup sfind dup |
2dup sfind dup |
IF |
IF |
1 and |
1 and |
IF \ not restricted to compile state? |
IF \ not restricted to compile state? |
nip nip execute EXIT |
nip nip execute EXIT |
THEN |
THEN |
-&14 throw |
-&14 throw |
THEN |
THEN |
Line 352 Defer notfound ( c-addr count -- )
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Line 381 Defer notfound ( c-addr count -- )
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2r> notfound |
2r> notfound |
THEN ; |
THEN ; |
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' sinterpreter IS parser |
' interpreter IS parser |
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: scompiler ( c-addr u -- ) |
: compiler ( c-addr u -- ) |
\ compilation semantics for the name/number c-addr u |
\ compilation semantics for the name/number c-addr u |
2dup sfind dup |
2dup sfind dup |
IF |
IF |
Line 377 Defer notfound ( c-addr count -- )
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Line 406 Defer notfound ( c-addr count -- )
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drop notfound |
drop notfound |
THEN ; |
THEN ; |
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: [ ['] sinterpreter IS parser state off ; immediate |
: [ ['] interpreter IS parser state off ; immediate |
: ] ['] scompiler IS parser state on ; |
: ] ['] compiler IS parser state on ; |
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\ locals stuff needed for control structures |
\ locals stuff needed for control structures |
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: compile-lp+! ( n -- ) |
: compile-lp+! ( n -- ) |
dup negate locals-size +! |
dup negate locals-size +! |
0 over = if |
0 over = if |
else -4 over = if postpone -4lp+! |
else -1 cells over = if postpone lp- |
else 8 over = if postpone 8lp+! |
else 1 floats over = if postpone lp+ |
else 16 over = if postpone 16lp+! |
else 2 floats over = if postpone lp+2 |
else postpone lp+!# dup , |
else postpone lp+!# dup , |
then then then then drop ; |
then then then then drop ; |
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Line 402 AConstant locals-list \ acts like a vari
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Line 431 AConstant locals-list \ acts like a vari
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variable dead-code \ true if normal code at "here" would be dead |
variable dead-code \ true if normal code at "here" would be dead |
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variable backedge-locals |
: unreachable ( -- ) |
\ contains the locals list that BEGIN will assume to be live on |
\ declares the current point of execution as unreachable |
\ the back edge if the BEGIN is unreachable from above. Set by |
dead-code on ; |
\ ASSUME-LIVE, reset by UNREACHABLE. |
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: UNREACHABLE ( -- ) |
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\ declares the current point of execution as unreachable |
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dead-code on |
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0 backedge-locals ! ; immediate |
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: ASSUME-LIVE ( orig -- orig ) |
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\ used immediateliy before a BEGIN that is not reachable from |
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\ above. causes the BEGIN to assume that the same locals are live |
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\ as at the orig point |
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dup orig? |
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2 pick backedge-locals ! ; immediate |
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\ locals list operations |
\ locals list operations |
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: common-list ( list1 list2 -- list3 ) |
: common-list ( list1 list2 -- list3 ) |
Line 531 variable dead-code \ true if normal code
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Line 572 variable dead-code \ true if normal code
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\ Structural Conditionals 12dec92py |
\ Structural Conditionals 12dec92py |
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: AHEAD ( -- orig ) |
: AHEAD ( -- orig ) |
POSTPONE branch >mark unreachable ; immediate restrict |
POSTPONE branch >mark POSTPONE unreachable ; immediate restrict |
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: IF ( -- orig ) |
: IF ( -- orig ) |
POSTPONE ?branch >mark ; immediate restrict |
POSTPONE ?branch >mark ; immediate restrict |
Line 545 variable dead-code \ true if normal code
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Line 586 variable dead-code \ true if normal code
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: THEN ( orig -- ) |
: THEN ( orig -- ) |
dup orig? |
dup orig? |
dead-code @ |
dead-orig = |
if |
if |
dead-orig = |
>resolve drop |
if |
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>resolve drop |
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else |
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>resolve set-locals-size-list dead-code off |
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then |
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else |
else |
dead-orig = |
dead-code @ |
if |
if |
>resolve drop |
>resolve set-locals-size-list dead-code off |
else \ both live |
else \ both live |
over list-size adjust-locals-size |
over list-size adjust-locals-size |
>resolve |
>resolve |
Line 578 variable dead-code \ true if normal code
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Line 614 variable dead-code \ true if normal code
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: BEGIN ( -- dest ) |
: BEGIN ( -- dest ) |
dead-code @ if |
dead-code @ if |
\ set up an assumption of the locals visible here |
\ set up an assumption of the locals visible here. if the |
\ currently we just take the top cs-item |
\ users want something to be visible, they have to declare |
\ it would be more intelligent to take the top orig |
\ that using ASSUME-LIVE |
\ but that can be arranged by the user |
backedge-locals @ set-locals-size-list |
dup defstart <> if |
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dup cs-item? |
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2 pick |
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else |
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0 |
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then |
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set-locals-size-list |
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then |
then |
cs-push-part dest |
cs-push-part dest |
dead-code off ; immediate restrict |
dead-code off ; immediate restrict |
Line 604 variable dead-code \ true if normal code
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Line 633 variable dead-code \ true if normal code
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POSTPONE branch |
POSTPONE branch |
<resolve |
<resolve |
check-begin |
check-begin |
unreachable ; immediate restrict |
POSTPONE unreachable ; immediate restrict |
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\ UNTIL (the current control flow may join an earlier one or continue): |
\ UNTIL (the current control flow may join an earlier one or continue): |
\ Similar to AGAIN. The new locals-list and locals-size are the current |
\ Similar to AGAIN. The new locals-list and locals-size are the current |
Line 675 Avariable leave-sp leave-stack 3 cells
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Line 704 Avariable leave-sp leave-stack 3 cells
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cell - dup @ swap |
cell - dup @ swap |
leave-sp ! ; |
leave-sp ! ; |
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: DONE ( orig -- ) drop >r drop |
: DONE ( orig -- ) |
\ !! the original done had ( addr -- ) |
\ !! the original done had ( addr -- ) |
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drop >r drop |
begin |
begin |
leave> |
leave> |
over r@ u>= |
over r@ u>= |
Line 736 Avariable leave-sp leave-stack 3 cells
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Line 766 Avariable leave-sp leave-stack 3 cells
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: EXIT ( -- ) |
: EXIT ( -- ) |
0 adjust-locals-size |
0 adjust-locals-size |
POSTPONE ;s |
POSTPONE ;s |
unreachable ; immediate restrict |
POSTPONE unreachable ; immediate restrict |
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: ?EXIT ( -- ) |
: ?EXIT ( -- ) |
POSTPONE if POSTPONE exit POSTPONE then ; immediate restrict |
POSTPONE if POSTPONE exit POSTPONE then ; immediate restrict |
Line 756 Avariable leave-sp leave-stack 3 cells
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Line 786 Avariable leave-sp leave-stack 3 cells
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: ." state @ IF postpone (.") ," align |
: ." state @ IF postpone (.") ," align |
ELSE [char] " parse type THEN ; immediate |
ELSE [char] " parse type THEN ; immediate |
: ( [char] ) parse 2drop ; immediate |
: ( [char] ) parse 2drop ; immediate |
: \ source >in ! drop ; immediate |
: \ ( -- ) \ core-ext backslash |
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blk @ |
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IF |
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>in @ c/l / 1+ c/l * >in ! |
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EXIT |
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THEN |
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source >in ! drop ; immediate |
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: G\ ( -- ) \ new backslash |
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POSTPONE \ ; immediate |
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\ error handling 22feb93py |
\ error handling 22feb93py |
\ 'abort thrown out! 11may93jaw |
\ 'abort thrown out! 11may93jaw |
Line 781 Avariable leave-sp leave-stack 3 cells
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Line 820 Avariable leave-sp leave-stack 3 cells
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\ with existing/independent defining words |
\ with existing/independent defining words |
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defer (header) |
defer (header) |
defer header ' (header) IS header |
defer header ' (header) IS header |
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: string, ( c-addr u -- ) |
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\ puts down string as cstring |
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dup c, here swap chars dup allot move ; |
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: name, ( "name" -- ) |
: name, ( "name" -- ) |
name c@ |
name |
dup $1F u> -&19 and throw ( is name too long? ) |
dup $1F u> -&19 and throw ( is name too long? ) |
1+ chars allot align ; |
string, cfalign ; |
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: input-stream-header ( "name" -- ) |
: input-stream-header ( "name" -- ) |
\ !! this is f83-implementation-dependent |
\ !! this is f83-implementation-dependent |
align here last ! -1 A, |
align here last ! -1 A, |
Line 806 create nextname-buffer 32 chars allot
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Line 848 create nextname-buffer 32 chars allot
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\ !! f83-implementation-dependent |
\ !! f83-implementation-dependent |
nextname-buffer count |
nextname-buffer count |
align here last ! -1 A, |
align here last ! -1 A, |
dup c, here swap chars dup allot move align |
string, cfalign |
$80 flag! |
$80 flag! |
input-stream ; |
input-stream ; |
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Line 818 create nextname-buffer 32 chars allot
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Line 860 create nextname-buffer 32 chars allot
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['] nextname-header IS (header) ; |
['] nextname-header IS (header) ; |
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: noname-header ( -- ) |
: noname-header ( -- ) |
0 last ! |
0 last ! cfalign |
input-stream ; |
input-stream ; |
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: noname ( -- ) \ general |
: noname ( -- ) \ general |
Line 838 create nextname-buffer 32 chars allot
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Line 880 create nextname-buffer 32 chars allot
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Create ??? 0 , 3 c, char ? c, char ? c, char ? c, |
Create ??? 0 , 3 c, char ? c, char ? c, char ? c, |
: >name ( cfa -- nfa ) |
: >name ( cfa -- nfa ) |
$21 cell do |
$21 cell do |
dup i - count $9F and + aligned over $80 + = if |
dup i - count $9F and + cfaligned over $80 + = if |
i - cell - unloop exit |
i - cell - unloop exit |
then |
then |
cell +loop |
cell +loop |
Line 884 Create ??? 0 , 3 c, char ? c, char ? c,
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Line 926 Create ??? 0 , 3 c, char ? c, char ? c,
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: Constant (Constant) , ; |
: Constant (Constant) , ; |
: AConstant (Constant) A, ; |
: AConstant (Constant) A, ; |
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: 2CONSTANT |
: 2Constant |
create ( w1 w2 "name" -- ) |
Create ( w1 w2 "name" -- ) |
2, |
2, |
does> ( -- w1 w2 ) |
DOES> ( -- w1 w2 ) |
2@ ; |
2@ ; |
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\ IS Defer What's Defers TO 24feb93py |
\ IS Defer What's Defers TO 24feb93py |
Line 947 AVariable current
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Line 989 AVariable current
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\ object oriented search list 17mar93py |
\ object oriented search list 17mar93py |
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\ word list structure: |
\ word list structure: |
\ struct |
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\ 1 cells: field find-method \ xt: ( c_addr u wid -- name-id ) |
struct |
\ 1 cells: field reveal-method \ xt: ( -- ) |
1 cells: field find-method \ xt: ( c_addr u wid -- name-id ) |
\ 1 cells: field rehash-method \ xt: ( wid -- ) |
1 cells: field reveal-method \ xt: ( -- ) |
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1 cells: field rehash-method \ xt: ( wid -- ) |
\ \ !! what else |
\ \ !! what else |
\ end-struct wordlist-map-struct |
end-struct wordlist-map-struct |
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\ struct |
struct |
\ 1 cells: field wordlist-id \ not the same as wid; representation depends on implementation |
1 cells: field wordlist-id \ not the same as wid; representation depends on implementation |
\ 1 cells: field wordlist-map \ pointer to a wordlist-map-struct |
1 cells: field wordlist-map \ pointer to a wordlist-map-struct |
\ 1 cells: field wordlist-link \ link field to other wordlists |
1 cells: field wordlist-link \ link field to other wordlists |
\ 1 cells: field wordlist-extend \ points to wordlist extensions (eg hash) |
1 cells: field wordlist-extend \ points to wordlist extensions (eg hash) |
\ end-struct wordlist-struct |
end-struct wordlist-struct |
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: f83find ( addr len wordlist -- nfa / false ) @ (f83find) ; |
: f83find ( addr len wordlist -- nfa / false ) @ (f83find) ; |
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Line 967 AVariable current
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Line 1010 AVariable current
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Create f83search ' f83find A, ' (reveal) A, ' drop A, |
Create f83search ' f83find A, ' (reveal) A, ' drop A, |
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Create forth-wordlist NIL A, G f83search T A, NIL A, NIL A, |
Create forth-wordlist NIL A, G f83search T A, NIL A, NIL A, |
AVariable search G forth-wordlist search T ! |
AVariable lookup G forth-wordlist lookup T ! |
G forth-wordlist current T ! |
G forth-wordlist current T ! |
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: (search-wordlist) ( addr count wid -- nfa / false ) |
: (search-wordlist) ( addr count wid -- nfa / false ) |
dup ( @ swap ) cell+ @ @ execute ; |
dup wordlist-map @ find-method @ execute ; |
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: search-wordlist ( addr count wid -- 0 / xt +-1 ) |
: search-wordlist ( addr count wid -- 0 / xt +-1 ) |
(search-wordlist) dup IF found THEN ; |
(search-wordlist) dup IF found THEN ; |
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Variable warnings G -1 warnings T ! |
Variable warnings G -1 warnings T ! |
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Line 993 Variable warnings G -1 warnings T !
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Line 1036 Variable warnings G -1 warnings T !
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2drop 2drop ; |
2drop 2drop ; |
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: sfind ( c-addr u -- xt n / 0 ) |
: sfind ( c-addr u -- xt n / 0 ) |
search @ search-wordlist ; |
lookup @ search-wordlist ; |
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: find ( addr -- cfa +-1 / string false ) |
: find ( addr -- cfa +-1 / string false ) |
\ !! not ANS conformant: returns +-2 for restricted words |
\ !! not ANS conformant: returns +-2 for restricted words |
Line 1005 Variable warnings G -1 warnings T !
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Line 1048 Variable warnings G -1 warnings T !
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last? if |
last? if |
name>string current @ check-shadow |
name>string current @ check-shadow |
then |
then |
current @ cell+ @ cell+ @ execute ; |
current @ wordlist-map @ reveal-method @ execute ; |
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: rehash ( wid -- ) dup cell+ @ cell+ cell+ @ execute ; |
: rehash ( wid -- ) dup wordlist-map @ rehash-method @ execute ; |
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: ' ( "name" -- addr ) name find 0= if drop -&13 bounce then ; |
: ' ( "name" -- addr ) name sfind 0= if -&13 bounce then ; |
: ['] ( "name" -- addr ) ' postpone ALiteral ; immediate |
: ['] ( "name" -- addr ) ' postpone ALiteral ; immediate |
\ Input 13feb93py |
\ Input 13feb93py |
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Line 1018 Variable warnings G -1 warnings T !
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Line 1061 Variable warnings G -1 warnings T !
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09 constant #tab |
09 constant #tab |
7F constant #del |
7F constant #del |
0D constant #cr \ the newline key code |
0D constant #cr \ the newline key code |
0A constant #lf |
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0C constant #ff |
0C constant #ff |
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0A constant #lf |
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: bell #bell emit ; |
: bell #bell emit ; |
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: backspaces 0 ?DO #bs emit LOOP ; |
\ : backspaces 0 ?DO #bs emit LOOP ; |
: >string ( span addr pos1 -- span addr pos1 addr2 len ) |
: >string ( span addr pos1 -- span addr pos1 addr2 len ) |
over 3 pick 2 pick chars /string ; |
over 3 pick 2 pick chars /string ; |
: type-rest ( span addr pos1 -- span addr pos1 back ) |
: type-rest ( span addr pos1 -- span addr pos1 back ) |
Line 1040 Variable warnings G -1 warnings T !
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Line 1083 Variable warnings G -1 warnings T !
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: back dup IF 1- #bs emit ELSE #bell emit THEN 0 ; |
: back dup IF 1- #bs emit ELSE #bell emit THEN 0 ; |
: forw 2 pick over <> IF 2dup + c@ emit 1+ ELSE #bell emit THEN 0 ; |
: forw 2 pick over <> IF 2dup + c@ emit 1+ ELSE #bell emit THEN 0 ; |
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Create crtlkeys |
Create ctrlkeys |
] false false back false false false forw false |
] false false back false false false forw false |
?del false (ret) false false (ret) false false |
?del false (ret) false false (ret) false false |
false false false false false false false false |
false false false false false false false false |
false false false false false false false false [ |
false false false false false false false false [ |
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defer everychar |
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' noop IS everychar |
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: decode ( max span addr pos1 key -- max span addr pos2 flag ) |
: decode ( max span addr pos1 key -- max span addr pos2 flag ) |
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everychar |
dup #del = IF drop #bs THEN \ del is rubout |
dup #del = IF drop #bs THEN \ del is rubout |
dup bl < IF cells crtlkeys + @ execute EXIT THEN |
dup bl < IF cells ctrlkeys + @ execute EXIT THEN |
>r 2over = IF rdrop bell 0 EXIT THEN |
>r 2over = IF rdrop bell 0 EXIT THEN |
r> (ins) 0 ; |
r> (ins) 0 ; |
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Line 1064 Create crtlkeys
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Line 1111 Create crtlkeys
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\ Output 13feb93py |
\ Output 13feb93py |
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DEFER type \ defer type for a output buffer or fast |
Defer type \ defer type for a output buffer or fast |
\ screen write |
\ screen write |
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\ : (type) ( addr len -- ) |
\ : (type) ( addr len -- ) |
\ bounds ?DO I c@ emit LOOP ; |
\ bounds ?DO I c@ emit LOOP ; |
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' (TYPE) IS Type |
' (type) IS Type |
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DEFER Emit |
Defer emit |
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' (Emit) IS Emit |
' (Emit) IS Emit |
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Defer key |
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' (key) IS key |
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\ : form ( -- rows cols ) &24 &80 ; |
\ : form ( -- rows cols ) &24 &80 ; |
\ form should be implemented using TERMCAPS or CURSES |
\ form should be implemented using TERMCAPS or CURSES |
\ : rows form drop ; |
\ : rows form drop ; |
Line 1084 DEFER Emit
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Line 1134 DEFER Emit
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\ Query 07apr93py |
\ Query 07apr93py |
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|
: refill ( -- flag ) |
: refill ( -- flag ) |
|
blk @ IF 1 blk +! true EXIT THEN |
tib /line |
tib /line |
loadfile @ ?dup |
loadfile @ ?dup |
IF \ dup file-position throw linestart 2! |
IF read-line throw |
read-line throw |
|
ELSE loadline @ 0< IF 2drop false EXIT THEN |
ELSE loadline @ 0< IF 2drop false EXIT THEN |
accept true |
accept true |
THEN |
THEN |
1 loadline +! |
1 loadline +! |
swap #tib ! 0 >in ! ; |
swap #tib ! 0 >in ! ; |
|
|
: Query ( -- ) 0 loadfile ! refill drop ; |
: Query ( -- ) loadfile off blk off refill drop ; |
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\ File specifiers 11jun93jaw |
\ File specifiers 11jun93jaw |
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Line 1123 create nl$ 1 c, A c, 0 c, \ gnu includes
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Line 1173 create nl$ 1 c, A c, 0 c, \ gnu includes
|
\ include-file 07apr93py |
\ include-file 07apr93py |
|
|
: push-file ( -- ) r> |
: push-file ( -- ) r> |
( linestart 2@ >r >r ) loadline @ >r loadfile @ >r |
loadline @ >r loadfile @ >r |
blk @ >r >tib @ >r #tib @ dup >r >tib +! >in @ >r >r ; |
blk @ >r >tib @ >r #tib @ dup >r >tib +! >in @ >r >r ; |
|
|
: pop-file ( -- ) r> |
: pop-file ( throw-code -- throw-code ) |
r> >in ! r> #tib ! r> >tib ! r> blk ! |
dup IF |
r> loadfile ! r> loadline ! ( r> r> linestart 2! ) >r ; |
source >in @ loadline @ loadfilename 2@ |
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error-stack dup @ dup 1+ |
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max-errors 1- min error-stack ! |
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6 * cells + cell+ |
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5 cells bounds swap DO |
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I ! |
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-1 cells +LOOP |
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THEN |
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r> |
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r> >in ! r> #tib ! r> >tib ! r> blk ! |
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r> loadfile ! r> loadline ! >r ; |
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|
|
: read-loop ( i*x -- j*x ) |
|
BEGIN refill WHILE interpret REPEAT ; |
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|
: include-file ( i*x fid -- j*x ) |
: include-file ( i*x fid -- j*x ) |
push-file loadfile ! |
push-file loadfile ! |
0 loadline ! blk off |
0 loadline ! blk off ['] read-loop catch |
BEGIN refill WHILE interpret REPEAT |
loadfile @ close-file swap 2dup or |
loadfile @ close-file throw |
pop-file drop throw throw ; |
pop-file ; |
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create pathfilenamebuf 256 chars allot \ !! make this grow on demand |
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: open-path-file ( c-addr1 u1 -- file-id c-addr2 u2 ) |
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\ opens a file for reading, searching in the path for it; c-addr2 |
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\ u2 is the full filename (valid until the next call); if the file |
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\ is not found (or in case of other errors for each try), -38 |
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\ (non-existant file) is thrown. Opening for other access modes |
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\ makes little sense, as the path will usually contain dirs that |
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\ are only readable for the user |
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\ !! check for "/", "./", "../" in original filename; check for "~/"? |
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pathdirs 2@ 0 |
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?DO ( c-addr1 u1 dirnamep ) |
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dup >r 2@ dup >r pathfilenamebuf swap cmove ( addr u ) |
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2dup pathfilenamebuf r@ chars + swap cmove ( addr u ) |
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pathfilenamebuf over r> + dup >r r/o open-file 0= |
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if ( addr u file-id ) |
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nip nip r> rdrop 0 leave |
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then |
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rdrop drop r> cell+ cell+ |
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LOOP |
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0<> -&38 and throw ( file-id u2 ) |
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pathfilenamebuf swap ; |
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create included-files 0 , 0 , ( pointer to and count of included files ) |
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: included? ( c-addr u -- f ) |
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\ true, iff filename c-addr u is in included-files |
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included-files 2@ 0 |
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?do ( c-addr u addr ) |
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dup >r 2@ 2over compare 0= |
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if |
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2drop rdrop unloop |
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true EXIT |
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then |
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r> cell+ cell+ |
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loop |
|
2drop drop false ; |
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: included ( i*x addr u -- j*x ) |
: add-included-file ( c-addr u -- ) |
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\ add name c-addr u to included-files |
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included-files 2@ tuck 1+ 2* cells resize throw |
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swap 2dup 1+ included-files 2! |
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2* cells + 2! ; |
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|
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: save-string ( addr1 u -- addr2 u ) |
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swap >r |
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dup allocate throw |
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swap 2dup r> -rot move ; |
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|
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: included1 ( i*x file-id c-addr u -- j*x ) |
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\ include the file file-id with the name given by c-addr u |
loadfilename 2@ >r >r |
loadfilename 2@ >r >r |
dup allocate throw over loadfilename 2! |
save-string 2dup loadfilename 2! add-included-file ( file-id ) |
over loadfilename 2@ move |
['] include-file catch |
r/o open-file throw include-file |
r> r> loadfilename 2! throw ; |
\ don't free filenames; they don't take much space |
|
\ and are used for debugging |
: included ( i*x addr u -- j*x ) |
r> r> loadfilename 2! ; |
open-path-file included1 ; |
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|
|
: required ( i*x addr u -- j*x ) |
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\ include the file with the name given by addr u, if it is not |
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\ included already. Currently this works by comparing the name of |
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\ the file (with path) against the names of earlier included |
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\ files; however, it would probably be better to fstat the file, |
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\ and compare the device and inode. The advantages would be: no |
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\ problems with several paths to the same file (e.g., due to |
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\ links) and we would catch files included with include-file and |
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\ write a require-file. |
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open-path-file 2dup included? |
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if |
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2drop close-file throw |
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else |
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included1 |
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then ; |
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|
\ HEX DECIMAL 2may93jaw |
\ HEX DECIMAL 2may93jaw |
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|
Line 1154 create nl$ 1 c, A c, 0 c, \ gnu includes
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Line 1282 create nl$ 1 c, A c, 0 c, \ gnu includes
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\ DEPTH 9may93jaw |
\ DEPTH 9may93jaw |
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: depth ( -- +n ) sp@ s0 @ swap - cell / ; |
: depth ( -- +n ) sp@ s0 @ swap - cell / ; |
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: clearstack ( ... -- ) s0 @ sp! ; |
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\ INCLUDE 9may93jaw |
\ INCLUDE 9may93jaw |
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: include ( "file" -- ) |
: include ( "file" -- ) |
bl word count included ; |
name included ; |
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|
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: require ( "file" -- ) |
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name required ; |
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|
\ RECURSE 17may93jaw |
\ RECURSE 17may93jaw |
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|
Line 1180 create nl$ 1 c, A c, 0 c, \ gnu includes
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Line 1312 create nl$ 1 c, A c, 0 c, \ gnu includes
|
push-file dup #tib ! >tib @ swap move |
push-file dup #tib ! >tib @ swap move |
>in off blk off loadfile off -1 loadline ! |
>in off blk off loadfile off -1 loadline ! |
|
|
BEGIN interpret >in @ #tib @ u>= UNTIL |
\ BEGIN interpret >in @ #tib @ u>= UNTIL |
|
['] interpret catch |
pop-file ; |
pop-file throw ; |
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|
|
|
: abort -1 throw ; |
: abort -1 throw ; |
Line 1200 Defer .status
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Line 1332 Defer .status
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\ DOERROR (DOERROR) 13jun93jaw |
\ DOERROR (DOERROR) 13jun93jaw |
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|
|
8 Constant max-errors |
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Variable error-stack 0 error-stack ! |
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max-errors 6 * cells allot |
|
\ format of one cell: |
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\ source ( addr u ) |
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\ >in |
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\ line-number |
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\ Loadfilename ( addr u ) |
|
|
: dec. ( n -- ) |
: dec. ( n -- ) |
\ print value in decimal representation |
\ print value in decimal representation |
base @ decimal swap . base ! ; |
base @ decimal swap . base ! ; |
|
|
: typewhite ( addr u -- ) |
: typewhite ( addr u -- ) |
\ like type, but white space is printed instead of the characters |
\ like type, but white space is printed instead of the characters |
0 ?do |
bounds ?do |
dup i + c@ 9 = if \ check for tab |
i c@ 9 = if \ check for tab |
9 |
9 |
else |
else |
bl |
bl |
then |
then |
emit |
emit |
loop |
loop |
drop ; |
; |
|
|
DEFER DOERROR |
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 -- ) |
: (DoError) ( throw-code -- ) |
LoadFile @ |
loadline @ IF |
IF |
source >in @ loadline @ 0 0 .error-frame |
cr loadfilename 2@ type ." :" Loadline @ dec. |
THEN |
THEN |
error-stack @ 0 ?DO |
cr source type cr |
-1 error-stack +! |
source drop >in @ -trailing ( throw-code line-start index2 ) |
error-stack dup @ 6 * cells + cell+ |
here c@ 1F min dup >r - 0 max ( throw-code line-start index1 ) |
6 cells bounds DO |
typewhite |
I @ |
r> 1 max 0 ?do \ we want at least one "^", even if the length is 0 |
cell +LOOP |
." ^" |
.error-frame |
loop |
LOOP |
dup -2 = |
dup -2 = |
IF |
IF |
"error @ ?dup |
"error @ ?dup |
IF |
IF |
cr count type |
cr count type |
THEN |
THEN |
drop |
drop |
ELSE |
ELSE |
.error |
.error |
THEN |
THEN |
normal-dp dpp ! ; |
normal-dp dpp ! ; |
|
|
' (DoError) IS DoError |
' (DoError) IS DoError |
|
|
Line 1259 DEFER DOERROR
|
Line 1420 DEFER DOERROR
|
\ : words listwords @ |
\ : words listwords @ |
\ BEGIN @ dup WHILE dup .name REPEAT drop ; |
\ BEGIN @ dup WHILE dup .name REPEAT drop ; |
|
|
: >len ( cstring -- addr n ) 100 0 scan 0 swap 100 - /string ; |
: cstring>sstring ( cstring -- addr n ) -1 0 scan 0 swap 1+ /string ; |
: arg ( n -- addr count ) cells argv @ + @ >len ; |
: arg ( n -- addr count ) cells argv @ + @ cstring>sstring ; |
: #! postpone \ ; immediate |
: #! postpone \ ; immediate |
|
|
Variable env |
Create pathstring 2 cells allot \ string |
|
Create pathdirs 2 cells allot \ dir string array, pointer and count |
Variable argv |
Variable argv |
Variable argc |
Variable argc |
|
|
0 Value script? ( -- flag ) |
0 Value script? ( -- flag ) |
|
|
: ">tib ( addr len -- ) dup #tib ! >in off tib swap move ; |
: process-path ( addr1 u1 -- addr2 u2 ) |
|
\ addr1 u1 is a path string, addr2 u2 is an array of dir strings |
|
here >r |
|
BEGIN |
|
over >r [char] : scan |
|
over r> tuck - ( rest-str this-str ) |
|
dup |
|
IF |
|
2dup 1- chars + c@ [char] / <> |
|
IF |
|
2dup chars + [char] / swap c! |
|
1+ |
|
THEN |
|
2, |
|
ELSE |
|
2drop |
|
THEN |
|
dup |
|
WHILE |
|
1 /string |
|
REPEAT |
|
2drop |
|
here r> tuck - 2 cells / ; |
|
|
|
: do-option ( addr1 len1 addr2 len2 -- n ) |
|
2swap |
|
2dup s" -e" compare 0= >r |
|
2dup s" --evaluate" compare 0= r> or |
|
IF 2drop dup >r ['] evaluate catch |
|
?dup IF dup >r DoError r> negate (bye) THEN |
|
r> >tib +! 2 EXIT THEN |
|
." Unknown option: " type cr 2drop 1 ; |
|
|
|
: process-args ( -- ) >tib @ >r |
|
argc @ 1 |
|
?DO |
|
I arg over c@ [char] - <> |
|
IF |
|
true to script? included false to script? 1 |
|
ELSE |
|
I 1+ arg do-option |
|
THEN |
|
+LOOP |
|
r> >tib ! ; |
|
|
: do-option ( addr1 len1 addr2 len2 -- n ) 2swap |
Defer 'cold ' noop IS 'cold |
2dup s" -e" compare 0= >r |
|
2dup s" -evaluate" compare 0= r> or |
|
IF 2drop ">tib interpret 2 EXIT THEN |
|
." Unknown option: " type cr 2drop 1 ; |
|
|
|
: process-args ( -- ) argc @ 1 |
|
?DO I arg over c@ [char] - <> |
|
IF true to script? included false to script? 1 |
|
ELSE I 1+ arg do-option |
|
THEN |
|
+LOOP ; |
|
|
|
: cold ( -- ) |
: cold ( -- ) |
|
pathstring 2@ process-path pathdirs 2! |
|
0 0 included-files 2! |
|
'cold |
argc @ 1 > |
argc @ 1 > |
IF |
IF |
['] process-args catch ?dup |
['] process-args catch ?dup |
Line 1296 Variable argc
|
Line 1493 Variable argc
|
." GNU Forth 0.0alpha, Copyright (C) 1994 Free Software Foundation, Inc." cr |
." GNU Forth 0.0alpha, Copyright (C) 1994 Free Software Foundation, Inc." cr |
." GNU Forth comes with ABSOLUTELY NO WARRANTY; for details type `license'" cr |
." GNU Forth comes with ABSOLUTELY NO WARRANTY; for details type `license'" cr |
." Type `bye' to exit" |
." Type `bye' to exit" |
quit ; |
loadline off quit ; |
|
|
: license ( -- ) cr |
: license ( -- ) cr |
." This program is free software; you can redistribute it and/or modify" cr |
." This program is free software; you can redistribute it and/or modify" cr |
Line 1313 Variable argc
|
Line 1510 Variable argc
|
." along with this program; if not, write to the Free Software" cr |
." along with this program; if not, write to the Free Software" cr |
." Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA." cr ; |
." Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA." cr ; |
|
|
: boot ( **env **argv argc -- ) |
: boot ( path **argv argc -- ) |
argc ! argv ! env ! main-task up! |
argc ! argv ! cstring>sstring pathstring 2! main-task up! |
sp@ dup s0 ! $10 + >tib ! rp@ r0 ! fp@ f0 ! cold ; |
sp@ dup s0 ! $10 + >tib ! #tib off >in off |
|
rp@ r0 ! fp@ f0 ! cold ; |
|
|
: bye script? 0= IF cr THEN 0 (bye) ; |
: bye script? 0= IF cr THEN 0 (bye) ; |
|
|