version 1.3, 1994/05/03 15:24:12
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version 1.56, 1996/05/06 12:39:02
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\ KERNAL.FS ANS figFORTH kernal 17dec92py |
\ KERNAL.FS GForth kernal 17dec92py |
\ $ID: |
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\ Copyright (C) 1995 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
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\ Gforth is free software; you can redistribute it and/or |
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\ modify it under the terms of the GNU General Public License |
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\ as published by the Free Software Foundation; either version 2 |
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\ of the License, or (at your option) any later version. |
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\ This program is distributed in the hope that it will be useful, |
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\ but WITHOUT ANY WARRANTY; without even the implied warranty of |
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\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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\ GNU General Public License for more details. |
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\ You should have received a copy of the GNU General Public License |
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\ along with this program; if not, write to the Free Software |
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\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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\ Idea and implementation: Bernd Paysan (py) |
\ Idea and implementation: Bernd Paysan (py) |
\ Copyright 1992 by the ANSI figForth Development Group |
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\ Log: ', '- usw. durch [char] ... ersetzt |
\ Log: ', '- usw. durch [char] ... ersetzt |
\ man sollte die unterschiedlichen zahlensysteme |
\ man sollte die unterschiedlichen zahlensysteme |
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HEX |
HEX |
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\ labels for some code addresses |
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: docon: ( -- addr ) \ gforth |
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\ the code address of a @code{CONSTANT} |
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['] bl >code-address ; |
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: docol: ( -- addr ) \ gforth |
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\ the code address of a colon definition |
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['] docon: >code-address ; |
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: dovar: ( -- addr ) \ gforth |
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\ the code address of a @code{CREATE}d word |
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['] udp >code-address ; |
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: douser: ( -- addr ) \ gforth |
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\ the code address of a @code{USER} variable |
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['] s0 >code-address ; |
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: dodefer: ( -- addr ) \ gforth |
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\ the code address of a @code{defer}ed word |
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['] source >code-address ; |
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: dofield: ( -- addr ) \ gforth |
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\ the code address of a @code{field} |
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['] reveal-method >code-address ; |
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\ Bit string manipulation 06oct92py |
\ Bit string manipulation 06oct92py |
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Create bits 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c, |
\ Create bits 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c, |
DOES> ( n -- ) + c@ ; |
\ DOES> ( n -- ) + c@ ; |
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: >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ; |
\ : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ; |
: +bit ( addr n -- ) >bit over c@ or swap c! ; |
\ : +bit ( addr n -- ) >bit over c@ or swap c! ; |
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: relinfo ( -- addr ) forthstart dup @ + ; |
\ : relinfo ( -- addr ) forthstart dup @ + !!bug!! ; |
: >rel ( addr -- n ) forthstart - ; |
\ : >rel ( addr -- n ) forthstart - ; |
: relon ( addr -- ) relinfo swap >rel cell / +bit ; |
\ : relon ( addr -- ) relinfo swap >rel cell / +bit ; |
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\ here allot , c, A, 17dec92py |
\ here allot , c, A, 17dec92py |
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: here ( -- here ) dp @ ; |
: dp ( -- addr ) \ gforth |
: allot ( n -- ) dp +! ; |
dpp @ ; |
: c, ( c -- ) here 1 chars allot c! ; |
: here ( -- here ) \ core |
: , ( x -- ) here cell allot ! ; |
dp @ ; |
: 2, ( w1 w2 -- ) \ general |
: allot ( n -- ) \ core |
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dp +! ; |
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: c, ( c -- ) \ core |
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here 1 chars allot c! ; |
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: , ( x -- ) \ core |
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here cell allot ! ; |
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: 2, ( w1 w2 -- ) \ gforth |
here 2 cells allot 2! ; |
here 2 cells allot 2! ; |
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: aligned ( addr -- addr' ) |
\ : aligned ( addr -- addr' ) \ core |
[ cell 1- ] Literal + [ -1 cells ] Literal and ; |
\ [ cell 1- ] Literal + [ -1 cells ] Literal and ; |
: align ( -- ) here dup aligned swap ?DO bl c, LOOP ; |
: align ( -- ) \ core |
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here dup aligned swap ?DO bl c, LOOP ; |
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\ : faligned ( addr -- f-addr ) \ float |
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\ [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ; |
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: falign ( -- ) \ float |
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here dup faligned swap |
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?DO |
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bl c, |
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LOOP ; |
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\ !! this is machine-dependent, but works on all but the strangest machines |
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' faligned Alias maxaligned ( addr1 -- addr2 ) \ gforth |
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' falign Alias maxalign ( -- ) \ gforth |
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\ !! machine-dependent and won't work if "0 >body" <> "0 >body maxaligned" |
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' maxaligned Alias cfaligned ( addr1 -- addr2 ) \ gforth |
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\ the code field is aligned if its body is maxaligned |
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' maxalign Alias cfalign ( -- ) \ gforth |
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: chars ( n1 -- n2 ) \ core |
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; immediate |
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\ : A! ( addr1 addr2 -- ) \ gforth |
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\ dup relon ! ; |
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\ : A, ( addr -- ) \ gforth |
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\ here cell allot A! ; |
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' ! alias A! ( addr1 addr2 -- ) \ gforth |
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' , alias A, ( addr -- ) \ gforth |
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: A! ( addr1 addr2 -- ) dup relon ! ; |
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: A, ( addr -- ) here cell allot A! ; |
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\ on off 23feb93py |
\ on off 23feb93py |
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: on ( addr -- ) true swap ! ; |
: on ( addr -- ) \ gforth |
: off ( addr -- ) false swap ! ; |
true swap ! ; |
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: off ( addr -- ) \ gforth |
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false swap ! ; |
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\ name> found 17dec92py |
\ name> found 17dec92py |
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: (name>) ( nfa -- cfa ) count $1F and + aligned ; |
: (name>) ( nfa+cell -- cfa ) |
: name> ( nfa -- cfa ) |
1 cells - name>string + cfaligned ; |
dup (name>) swap c@ $80 and 0= IF @ THEN ; |
: name> ( nfa -- cfa ) \ gforth |
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cell+ |
: found ( nfa -- cfa n ) cell+ |
dup (name>) swap c@ $80 and 0= IF @ THEN ; |
dup c@ >r (name>) r@ $80 and 0= IF @ THEN |
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\ -1 r@ $40 and IF 1- THEN |
: found ( nfa -- cfa n ) \ gforth |
-1 r> $20 and IF negate THEN ; |
cell+ |
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dup c@ >r (name>) r@ $80 and 0= IF @ THEN |
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-1 r@ $40 and IF 1- THEN |
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r> $20 and IF negate THEN ; |
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\ (find) 17dec92py |
\ (find) 17dec92py |
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\ : (find) ( addr count nfa1 -- nfa2 / false ) |
\ : (find) ( addr count nfa1 -- nfa2 / false ) |
\ BEGIN dup WHILE dup >r |
\ BEGIN dup WHILE dup >r |
\ cell+ count $1F and dup >r 2over r> = |
\ name>string dup >r 2over r> = |
\ IF -text 0= IF 2drop r> EXIT THEN |
\ IF -text 0= IF 2drop r> EXIT THEN |
\ ELSE 2drop drop THEN r> @ |
\ ELSE 2drop drop THEN r> @ |
\ REPEAT nip nip ; |
\ REPEAT nip nip ; |
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\ place bounds 13feb93py |
\ place bounds 13feb93py |
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: place ( addr len to -- ) over >r rot over 1+ r> move c! ; |
: place ( addr len to -- ) \ gforth |
: bounds ( beg count -- end beg ) over + swap ; |
over >r rot over 1+ r> move c! ; |
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: bounds ( beg count -- end beg ) \ gforth |
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over + swap ; |
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\ input stream primitives 23feb93py |
\ input stream primitives 23feb93py |
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: tib >tib @ ; |
: tib ( -- c-addr ) \ core-ext |
Defer source |
\ obsolescent |
: (source) ( -- addr count ) tib #tib @ ; |
>tib @ ; |
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Defer source ( -- addr count ) \ core |
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\ used by dodefer:, must be defer |
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: (source) ( -- addr count ) |
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tib #tib @ ; |
' (source) IS source |
' (source) IS 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 ) \ gforth |
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 ) \ gforth |
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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 113 Defer source
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Line 217 Defer source
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\ word parse 23feb93py |
\ word parse 23feb93py |
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: parse-word ( char -- addr len ) |
: parse-word ( char -- addr len ) \ gforth |
source 2dup >r >r >in @ /string |
source 2dup >r >r >in @ over min /string |
rot dup bl = IF drop (parse-white) ELSE (word) THEN |
rot dup bl = IF drop (parse-white) ELSE (word) THEN |
2dup + r> - 1+ r> min >in ! ; |
2dup + r> - 1+ r> min >in ! ; |
: word ( char -- addr ) |
: word ( char -- addr ) \ core |
parse-word here place bl here count + c! here ; |
parse-word here place bl here count + c! here ; |
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: parse ( char -- addr len ) |
: parse ( char -- addr len ) \ core-ext |
>r source >in @ /string over swap r> scan >r |
>r source >in @ over min /string over swap r> scan >r |
over - dup r> IF 1+ THEN >in +! ; |
over - dup r> IF 1+ THEN >in +! ; |
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\ name 13feb93py |
\ name 13feb93py |
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: capitalize ( addr -- addr ) |
: capitalize ( addr len -- addr len ) \ gforth |
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 ) |
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source 2dup >r >r >in @ /string (parse-white) |
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2dup + r> - 1+ r> min >in ! ; |
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\ name count ; |
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: name-too-short? ( c-addr u -- c-addr u ) |
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dup 0= -&16 and throw ; |
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: name-too-long? ( c-addr u -- c-addr u ) |
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dup $1F u> -&19 and throw ; |
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\ Literal 17dec92py |
\ Literal 17dec92py |
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: Literal ( n -- ) state @ 0= ?EXIT postpone lit , ; |
: Literal ( compilation n -- ; run-time -- n ) \ core |
immediate |
state @ IF postpone lit , THEN ; immediate |
: ALiteral ( n -- ) state @ 0= ?EXIT postpone lit A, ; |
: ALiteral ( compilation addr -- ; run-time -- addr ) \ gforth |
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state @ IF postpone lit A, THEN ; |
immediate |
immediate |
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: char ( 'char' -- n ) bl word char+ c@ ; |
: char ( 'char' -- n ) \ core |
: [char] ( 'char' -- n ) char postpone Literal ; immediate |
bl word char+ c@ ; |
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: [char] ( compilation 'char' -- ; run-time -- n ) |
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char postpone Literal ; immediate |
' [char] Alias Ascii immediate |
' [char] Alias Ascii immediate |
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: (compile) ( -- ) r> dup cell+ >r @ A, ; |
: (compile) ( -- ) \ gforth |
: postpone ( "name" -- ) |
r> dup cell+ >r @ compile, ; |
name find dup 0= abort" Can't compile " |
: postpone ( "name" -- ) \ core |
0> IF A, ELSE postpone (compile) A, THEN ; |
name sfind dup 0= abort" Can't compile " |
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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! |
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\ digit? 17dec92py |
\ digit? 17dec92py |
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: digit? ( char -- digit true/ false ) |
: digit? ( char -- digit true/ false ) \ gforth |
base @ $100 = ?dup ?EXIT |
base @ $100 = |
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IF |
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true EXIT |
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THEN |
toupper [char] 0 - dup 9 u> IF |
toupper [char] 0 - dup 9 u> IF |
[ 'A '9 1 + - ] literal - |
[ 'A '9 1 + - ] literal - |
dup 9 u<= IF |
dup 9 u<= IF |
Line 167 Defer source
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Line 287 Defer source
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: accumulate ( +d0 addr digit - +d1 addr ) |
: accumulate ( +d0 addr digit - +d1 addr ) |
swap >r swap base @ um* drop rot base @ um* d+ r> ; |
swap >r swap base @ um* drop rot base @ um* d+ r> ; |
: >number ( d addr count -- d addr count ) |
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0 ?DO count digit? WHILE accumulate LOOP 0 |
: >number ( d addr count -- d addr count ) \ core |
ELSE 1- I' I - UNLOOP THEN ; |
0 |
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?DO |
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count digit? |
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WHILE |
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accumulate |
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LOOP |
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0 |
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ELSE |
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1- I' I - |
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UNLOOP |
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THEN ; |
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\ number? number 23feb93py |
\ number? number 23feb93py |
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Create bases 10 , 2 , A , 100 , |
Create bases 10 , 2 , A , 100 , |
\ 16 2 10 Zeichen |
\ 16 2 10 Zeichen |
\ !! this saving and restoring base is an abomination! - anton |
\ !! this saving and restoring base is an abomination! - anton |
: getbase ( addr u -- addr' u' ) over c@ [char] $ - dup 4 u< |
: getbase ( addr u -- addr' u' ) |
IF cells bases + @ base ! 1 /string ELSE drop THEN ; |
over c@ [char] $ - dup 4 u< |
: number? ( string -- string 0 / n -1 ) base @ >r |
IF |
dup count over c@ [char] - = dup >r IF 1 /string THEN |
cells bases + @ base ! 1 /string |
getbase dpl on 0 0 2swap |
ELSE |
BEGIN dup >r >number dup WHILE dup r> - WHILE |
drop |
dup dpl ! over c@ [char] . = WHILE |
THEN ; |
1 /string |
: s>number ( addr len -- d ) |
REPEAT THEN 2drop 2drop rdrop false r> base ! EXIT THEN |
base @ >r dpl on |
2drop rot drop rdrop r> IF dnegate THEN |
over c@ '- = dup >r |
dpl @ dup 0< IF nip THEN r> base ! ; |
IF |
: s>d ( n -- d ) dup 0< ; |
1 /string |
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THEN |
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getbase dpl on 0 0 2swap |
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BEGIN |
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dup >r >number dup |
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WHILE |
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dup r> - |
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WHILE |
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dup dpl ! over c@ [char] . = |
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WHILE |
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1 /string |
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REPEAT THEN |
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2drop rdrop dpl off |
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ELSE |
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2drop rdrop r> |
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IF |
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dnegate |
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THEN |
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THEN |
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r> base ! ; |
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: snumber? ( c-addr u -- 0 / n -1 / d 0> ) |
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s>number dpl @ 0= |
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IF |
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2drop false EXIT |
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THEN |
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dpl @ dup 0> 0= IF |
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nip |
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THEN ; |
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: number? ( string -- string 0 / n -1 / d 0> ) |
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dup >r count snumber? dup if |
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rdrop |
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else |
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r> swap |
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then ; |
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: s>d ( n -- d ) \ core s-to-d |
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dup 0< ; |
: number ( string -- d ) |
: number ( string -- d ) |
number? ?dup 0= abort" ?" 0< IF s>d THEN ; |
number? ?dup 0= abort" ?" 0< |
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IF |
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s>d |
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THEN ; |
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\ space spaces ud/mod 21mar93py |
\ space spaces ud/mod 21mar93py |
decimal |
decimal |
Create spaces bl 80 times \ times from target compiler! 11may93jaw |
Create spaces ( u -- ) \ core |
DOES> ( u -- ) swap |
bl 80 times \ times from target compiler! 11may93jaw |
0 max 0 ?DO I' I - &80 min 2dup type +LOOP drop ; |
DOES> ( u -- ) |
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swap |
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0 max 0 ?DO I' I - &80 min 2dup type +LOOP drop ; |
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Create backspaces |
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08 80 times \ times from target compiler! 11may93jaw |
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DOES> ( u -- ) |
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swap |
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0 max 0 ?DO I' I - &80 min 2dup type +LOOP drop ; |
hex |
hex |
: space 1 spaces ; |
: space ( -- ) \ core |
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1 spaces ; |
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: ud/mod ( ud1 u2 -- urem udquot ) >r 0 r@ um/mod r> swap >r |
: ud/mod ( ud1 u2 -- urem udquot ) \ gforth |
um/mod r> ; |
>r 0 r@ um/mod r> swap >r |
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um/mod r> ; |
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: pad ( -- addr ) |
: pad ( -- addr ) \ core-ext |
here [ $20 8 2* cells + 2 + cell+ ] Literal + aligned ; |
here [ $20 8 2* cells + 2 + cell+ ] Literal + aligned ; |
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\ hold <# #> sign # #s 25jan92py |
\ hold <# #> sign # #s 25jan92py |
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: hold ( char -- ) pad cell - -1 chars over +! @ c! ; |
: hold ( char -- ) \ core |
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pad cell - -1 chars over +! @ c! ; |
: <# pad cell - dup ! ; |
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: #> ( 64b -- addr +n ) 2drop pad cell - dup @ tuck - ; |
: <# ( -- ) \ core less-number-sign |
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pad cell - dup ! ; |
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: sign ( n -- ) 0< IF [char] - hold THEN ; |
: #> ( xd -- addr u ) \ core number-sign-greater |
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2drop pad cell - dup @ tuck - ; |
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: # ( +d1 -- +d2 ) base @ 2 max ud/mod rot 9 over < |
: sign ( n -- ) \ core |
IF [ char A char 9 - 1- ] Literal + THEN [char] 0 + hold ; |
0< IF [char] - hold THEN ; |
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: # ( ud1 -- ud2 ) \ core number-sign |
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base @ 2 max ud/mod rot 9 over < |
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IF |
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[ char A char 9 - 1- ] Literal + |
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THEN |
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[char] 0 + hold ; |
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: #s ( +d -- 0 0 ) BEGIN # 2dup d0= UNTIL ; |
: #s ( +d -- 0 0 ) \ core number-sign-s |
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BEGIN |
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# 2dup d0= |
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UNTIL ; |
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\ print numbers 07jun92py |
\ print numbers 07jun92py |
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: d.r >r tuck dabs <# #s rot sign #> |
: d.r ( d n -- ) \ double d-dot-r |
r> over - spaces type ; |
>r tuck dabs <# #s rot sign #> |
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r> over - spaces type ; |
: ud.r >r <# #s #> r> over - spaces type ; |
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: ud.r ( ud n -- ) \ gforth u-d-dot-r |
: .r >r s>d r> d.r ; |
>r <# #s #> r> over - spaces type ; |
: u.r 0 swap ud.r ; |
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: .r ( n1 n2 -- ) \ core-ext dot-r |
: d. 0 d.r space ; |
>r s>d r> d.r ; |
: ud. 0 ud.r space ; |
: u.r ( u n -- ) \ core-ext u-dot-r |
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0 swap ud.r ; |
: . s>d d. ; |
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: u. 0 ud. ; |
: d. ( d -- ) \ double d-dot |
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0 d.r space ; |
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: ud. ( ud -- ) \ gforth u-d-dot |
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0 ud.r space ; |
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: . ( n -- ) \ core dot |
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s>d d. ; |
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: u. ( u -- ) \ core u-dot |
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0 ud. ; |
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\ catch throw 23feb93py |
\ catch throw 23feb93py |
\ bounce 08jun93jaw |
\ bounce 08jun93jaw |
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\ !! what about the other stacks (FP, locals) anton |
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\ !! allow the user to add rollback actions anton |
\ !! allow the user to add rollback actions anton |
\ !! use a separate exception stack? anton |
\ !! use a separate exception stack? anton |
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: catch ( x1 .. xn xt -- y1 .. ym 0 / z1 .. zn error ) |
: lp@ ( -- addr ) \ gforth l-p-fetch |
>r sp@ r> swap \ don't count xt! jaw |
laddr# [ 0 , ] ; |
>r handler @ >r rp@ handler ! execute |
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r> handler ! rdrop 0 ; |
: catch ( x1 .. xn xt -- y1 .. ym 0 / z1 .. zn error ) \ exception |
: throw ( y1 .. ym error/0 -- y1 .. ym / z1 .. zn ) |
>r sp@ r> swap >r \ don't count xt! jaw |
dup 0= IF drop EXIT THEN |
fp@ >r |
handler @ rp! r> handler ! r> swap >r sp! r> ; |
lp@ >r |
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handler @ >r |
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rp@ handler ! |
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execute |
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r> handler ! rdrop rdrop rdrop 0 ; |
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: throw ( y1 .. ym error/0 -- y1 .. ym / z1 .. zn error ) \ exception |
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?DUP IF |
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[ here 9 cells ! ] |
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handler @ rp! |
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r> handler ! |
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r> lp! |
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r> fp! |
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r> swap >r sp! r> |
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THEN ; |
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\ Bouncing is very fine, |
\ Bouncing is very fine, |
\ programming without wasting time... jaw |
\ programming without wasting time... jaw |
: bounce ( y1 .. ym error/0 -- y1 .. ym / z1 .. zn ) |
: bounce ( y1 .. ym error/0 -- y1 .. ym error / y1 .. ym ) \ gforth |
\ a throw without data stack restauration? anton !! stack diagram bad |
\ a throw without data or fp stack restauration |
dup 0= IF drop EXIT THEN |
?DUP IF |
handler @ rp! r> handler ! r> drop ; |
handler @ rp! |
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r> handler ! |
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r> lp! |
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rdrop |
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rdrop |
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THEN ; |
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\ ?stack 23feb93py |
\ ?stack 23feb93py |
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: ?stack ( ?? -- ?? ) sp@ s0 @ > IF -4 throw THEN ; |
: ?stack ( ?? -- ?? ) \ gforth |
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sp@ s0 @ > IF -4 throw THEN |
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fp@ f0 @ > IF -&45 throw THEN ; |
\ ?stack should be code -- it touches an empty stack! |
\ ?stack should be code -- it touches an empty stack! |
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\ interpret 10mar92py |
\ interpret 10mar92py |
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Defer parser |
Defer parser |
Defer name ' (name) IS name |
Defer name ( -- c-addr count ) \ gforth |
Defer notfound |
\ get the next word from the input buffer |
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' (name) IS name |
: no.extensions ( string -- ) IF &-13 bounce THEN ; |
Defer notfound ( c-addr count -- ) |
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: no.extensions ( addr u -- ) |
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2drop -&13 bounce ; |
' no.extensions IS notfound |
' no.extensions IS notfound |
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: interpret |
: compile-only ( ... -- ) |
BEGIN ?stack name dup c@ WHILE parser REPEAT drop ; |
-&14 throw ; |
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Defer interpret-special ( c-addr u xt -- ) \ !! use nfa instead of xt? |
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' compile-only IS interpret-special |
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: interpret ( ?? -- ?? ) \ gforth |
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\ interpret/compile the (rest of the) input buffer |
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BEGIN |
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?stack name dup |
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WHILE |
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parser |
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REPEAT |
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2drop ; |
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\ interpreter compiler 30apr92py |
\ interpreter compiler 30apr92py |
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: interpreter ( name -- ) find ?dup |
: interpreter ( c-addr u -- ) \ gforth |
IF 1 and IF execute EXIT THEN -&14 throw THEN |
\ interpretation semantics for the name/number c-addr u |
number? 0= IF notfound THEN ; |
2dup sfind dup |
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IF |
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1 and |
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IF \ not restricted to compile state? |
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nip nip execute EXIT |
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THEN |
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interpret-special exit |
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THEN |
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drop |
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2dup 2>r snumber? |
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IF |
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2rdrop |
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ELSE |
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2r> notfound |
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THEN ; |
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' interpreter IS parser |
' interpreter IS parser |
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: compiler ( name -- ) find ?dup |
: compiler ( c-addr u -- ) \ gforth |
IF 0> IF execute EXIT THEN compile, EXIT THEN number? dup |
\ compilation semantics for the name/number c-addr u |
IF 0> IF swap postpone Literal THEN postpone Literal |
2dup sfind dup |
ELSE drop notfound THEN ; |
IF |
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0> |
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IF |
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nip nip execute EXIT |
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THEN |
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compile, 2drop EXIT |
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THEN |
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drop |
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2dup snumber? dup |
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IF |
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0> |
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IF |
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swap postpone Literal |
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THEN |
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postpone Literal |
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2drop |
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ELSE |
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drop notfound |
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THEN ; |
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: [ ( -- ) \ core left-bracket |
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['] interpreter IS parser state off ; immediate |
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: ] ( -- ) \ core right-bracket |
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['] compiler IS parser state on ; |
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\ locals stuff needed for control structures |
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: compile-lp+! ( n -- ) \ gforth compile-l-p-plus-store |
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dup negate locals-size +! |
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0 over = if |
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else -1 cells over = if postpone lp- |
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else 1 floats over = if postpone lp+ |
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else 2 floats over = if postpone lp+2 |
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else postpone lp+!# dup , |
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then then then then drop ; |
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: adjust-locals-size ( n -- ) \ gforth |
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\ sets locals-size to n and generates an appropriate lp+! |
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locals-size @ swap - compile-lp+! ; |
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here 0 , \ just a dummy, the real value of locals-list is patched into it in glocals.fs |
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AConstant locals-list \ acts like a variable that contains |
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\ a linear list of locals names |
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variable dead-code \ true if normal code at "here" would be dead |
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variable backedge-locals |
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\ contains the locals list that BEGIN will assume to be live on |
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\ the back edge if the BEGIN is unreachable from above. Set by |
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\ ASSUME-LIVE, reset by UNREACHABLE. |
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: UNREACHABLE ( -- ) \ gforth |
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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 ) \ gforth |
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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 |
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: [ ['] interpreter IS parser state off ; immediate |
: common-list ( list1 list2 -- list3 ) \ gforth-internal |
: ] ['] compiler IS parser state on ; |
\ list1 and list2 are lists, where the heads are at higher addresses than |
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\ the tail. list3 is the largest sublist of both lists. |
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begin |
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2dup u<> |
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while |
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2dup u> |
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if |
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swap |
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then |
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@ |
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repeat |
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drop ; |
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: sub-list? ( list1 list2 -- f ) \ gforth-internal |
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\ true iff list1 is a sublist of list2 |
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begin |
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2dup u< |
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while |
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@ |
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repeat |
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= ; |
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: list-size ( list -- u ) \ gforth-internal |
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\ size of the locals frame represented by list |
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0 ( list n ) |
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begin |
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over 0<> |
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while |
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over |
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name> >body @ max |
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swap @ swap ( get next ) |
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repeat |
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faligned nip ; |
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: set-locals-size-list ( list -- ) |
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dup locals-list ! |
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list-size locals-size ! ; |
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: check-begin ( list -- ) |
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\ warn if list is not a sublist of locals-list |
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locals-list @ sub-list? 0= if |
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\ !! print current position |
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." compiler was overly optimistic about locals at a BEGIN" cr |
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\ !! print assumption and reality |
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then ; |
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\ Control Flow Stack |
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\ orig, etc. have the following structure: |
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\ type ( defstart, live-orig, dead-orig, dest, do-dest, scopestart) ( TOS ) |
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\ address (of the branch or the instruction to be branched to) (second) |
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\ locals-list (valid at address) (third) |
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\ types |
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0 constant defstart |
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1 constant live-orig |
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2 constant dead-orig |
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3 constant dest \ the loopback branch is always assumed live |
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4 constant do-dest |
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5 constant scopestart |
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: def? ( n -- ) |
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defstart <> abort" unstructured " ; |
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: orig? ( n -- ) |
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dup live-orig <> swap dead-orig <> and abort" expected orig " ; |
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: dest? ( n -- ) |
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dest <> abort" expected dest " ; |
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: do-dest? ( n -- ) |
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do-dest <> abort" expected do-dest " ; |
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: scope? ( n -- ) |
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scopestart <> abort" expected scope " ; |
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: non-orig? ( n -- ) |
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dest scopestart 1+ within 0= abort" expected dest, do-dest or scope" ; |
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: cs-item? ( n -- ) |
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live-orig scopestart 1+ within 0= abort" expected control flow stack item" ; |
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3 constant cs-item-size |
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: CS-PICK ( ... u -- ... destu ) \ tools-ext |
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1+ cs-item-size * 1- >r |
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r@ pick r@ pick r@ pick |
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rdrop |
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dup non-orig? ; |
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: CS-ROLL ( destu/origu .. dest0/orig0 u -- .. dest0/orig0 destu/origu ) \ tools-ext |
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1+ cs-item-size * 1- >r |
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r@ roll r@ roll r@ roll |
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rdrop |
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dup cs-item? ; |
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: cs-push-part ( -- list addr ) |
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locals-list @ here ; |
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: cs-push-orig ( -- orig ) |
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cs-push-part dead-code @ |
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if |
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dead-orig |
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else |
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live-orig |
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then ; |
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\ Structural Conditionals 12dec92py |
\ Structural Conditionals 12dec92py |
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: ?struc ( flag -- ) abort" unstructured " ; |
: ?struc ( flag -- ) abort" unstructured " ; |
: sys? ( sys -- ) dup 0= ?struc ; |
: sys? ( sys -- ) dup 0= ?struc ; |
: >mark ( -- sys ) here 0 , ; |
: >mark ( -- orig ) |
: >resolve ( sys -- ) here over - swap ! ; |
cs-push-orig 0 , ; |
: <resolve ( sys -- ) here - , ; |
: >resolve ( addr -- ) here over - swap ! ; |
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: <resolve ( addr -- ) here - , ; |
: BUT sys? swap ; immediate restrict |
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: YET sys? dup ; immediate restrict |
: BUT |
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1 cs-roll ; immediate restrict |
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: YET |
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0 cs-pick ; immediate restrict |
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\ Structural Conditionals 12dec92py |
\ Structural Conditionals 12dec92py |
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: AHEAD postpone branch >mark ; immediate restrict |
: AHEAD ( compilation -- orig ; run-time -- ) \ tools-ext |
: IF postpone ?branch >mark ; immediate restrict |
POSTPONE branch >mark POSTPONE unreachable ; immediate restrict |
: ?DUP-IF \ general |
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\ This is the preferred alternative to the idiom "?DUP IF", since it can be |
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\ better handled by tools like stack checkers |
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postpone ?dup postpone IF ; immediate restrict |
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: ?DUP-NOT-IF \ general |
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postpone ?dup postpone 0= postpone if ; immediate restrict |
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: THEN sys? dup @ ?struc >resolve ; immediate restrict |
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' THEN alias ENDIF immediate restrict \ general |
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\ Same as "THEN". This is what you use if your program will be seen by |
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\ people who have not been brought up with Forth (or who have been |
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\ brought up with fig-Forth). |
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: ELSE sys? postpone AHEAD swap postpone THEN ; |
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immediate restrict |
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: BEGIN here ; immediate restrict |
: IF ( compilation -- orig ; run-time f -- ) \ core |
: WHILE sys? postpone IF swap ; immediate restrict |
POSTPONE ?branch >mark ; immediate restrict |
: AGAIN sys? postpone branch <resolve ; immediate restrict |
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: UNTIL sys? postpone ?branch <resolve ; immediate restrict |
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: REPEAT over 0= ?struc postpone AGAIN postpone THEN ; |
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immediate restrict |
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\ Structural Conditionals 12dec92py |
: ?DUP-IF ( compilation -- orig ; run-time n -- n| ) \ gforth question-dupe-if |
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\ This is the preferred alternative to the idiom "?DUP IF", since it can be |
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\ better handled by tools like stack checkers. Besides, it's faster. |
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POSTPONE ?dup-?branch >mark ; immediate restrict |
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Variable leavings |
: ?DUP-0=-IF ( compilation -- orig ; run-time n -- n| ) \ gforth question-dupe-zero-equals-if |
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POSTPONE ?dup-0=-?branch >mark ; immediate restrict |
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: (leave) here leavings @ , leavings ! ; |
: THEN ( compilation orig -- ; run-time -- ) \ core |
: LEAVE postpone branch (leave) ; immediate restrict |
dup orig? |
: ?LEAVE postpone 0= postpone ?branch (leave) ; |
dead-orig = |
immediate restrict |
if |
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>resolve drop |
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else |
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dead-code @ |
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if |
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>resolve set-locals-size-list dead-code off |
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else \ both live |
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over list-size adjust-locals-size |
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>resolve |
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locals-list @ common-list dup list-size adjust-locals-size |
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locals-list ! |
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then |
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then ; immediate restrict |
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: DONE ( addr -- ) leavings @ |
' THEN alias ENDIF ( compilation orig -- ; run-time -- ) \ gforth |
BEGIN 2dup u<= WHILE dup @ swap >resolve REPEAT |
immediate restrict |
leavings ! drop ; immediate restrict |
\ Same as "THEN". This is what you use if your program will be seen by |
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\ people who have not been brought up with Forth (or who have been |
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\ brought up with fig-Forth). |
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\ Structural Conditionals 12dec92py |
: ELSE ( compilation orig1 -- orig2 ; run-time f -- ) \ core |
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POSTPONE ahead |
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1 cs-roll |
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POSTPONE then ; immediate restrict |
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: BEGIN ( compilation -- dest ; run-time -- ) \ core |
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dead-code @ if |
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\ set up an assumption of the locals visible here. if the |
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\ users want something to be visible, they have to declare |
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\ that using ASSUME-LIVE |
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backedge-locals @ set-locals-size-list |
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then |
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cs-push-part dest |
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dead-code off ; immediate restrict |
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\ AGAIN (the current control flow joins another, earlier one): |
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\ If the dest-locals-list is not a subset of the current locals-list, |
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\ issue a warning (see below). The following code is generated: |
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\ lp+!# (current-local-size - dest-locals-size) |
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\ branch <begin> |
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: AGAIN ( compilation dest -- ; run-time -- ) \ core-ext |
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dest? |
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over list-size adjust-locals-size |
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POSTPONE branch |
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<resolve |
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check-begin |
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POSTPONE unreachable ; immediate restrict |
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\ UNTIL (the current control flow may join an earlier one or continue): |
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\ Similar to AGAIN. The new locals-list and locals-size are the current |
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\ ones. The following code is generated: |
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\ ?branch-lp+!# <begin> (current-local-size - dest-locals-size) |
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: until-like ( list addr xt1 xt2 -- ) |
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\ list and addr are a fragment of a cs-item |
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\ xt1 is the conditional branch without lp adjustment, xt2 is with |
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>r >r |
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locals-size @ 2 pick list-size - dup if ( list dest-addr adjustment ) |
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r> drop r> compile, |
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swap <resolve ( list adjustment ) , |
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else ( list dest-addr adjustment ) |
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drop |
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r> compile, <resolve |
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r> drop |
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then ( list ) |
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check-begin ; |
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: UNTIL ( compilation dest -- ; run-time f -- ) \ core |
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dest? ['] ?branch ['] ?branch-lp+!# until-like ; immediate restrict |
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: WHILE ( compilation dest -- orig dest ; run-time f -- ) \ core |
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POSTPONE if |
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1 cs-roll ; immediate restrict |
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: REPEAT ( compilation orig dest -- ; run-time -- ) \ core |
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POSTPONE again |
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POSTPONE then ; immediate restrict |
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\ counted loops |
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\ leave poses a little problem here |
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\ we have to store more than just the address of the branch, so the |
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\ traditional linked list approach is no longer viable. |
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\ This is solved by storing the information about the leavings in a |
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\ special stack. |
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\ !! remove the fixed size limit. 'Tis not hard. |
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20 constant leave-stack-size |
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create leave-stack 60 cells allot |
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Avariable leave-sp leave-stack 3 cells + leave-sp ! |
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: clear-leave-stack ( -- ) |
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leave-stack leave-sp ! ; |
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\ : leave-empty? ( -- f ) |
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\ leave-sp @ leave-stack = ; |
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: >leave ( orig -- ) |
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\ push on leave-stack |
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leave-sp @ |
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dup [ leave-stack 60 cells + ] Aliteral |
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>= abort" leave-stack full" |
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tuck ! cell+ |
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tuck ! cell+ |
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tuck ! cell+ |
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leave-sp ! ; |
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: leave> ( -- orig ) |
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\ pop from leave-stack |
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leave-sp @ |
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dup leave-stack <= IF |
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drop 0 0 0 EXIT THEN |
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cell - dup @ swap |
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cell - dup @ swap |
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cell - dup @ swap |
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leave-sp ! ; |
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: DONE ( compilation orig -- ; run-time -- ) \ gforth |
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\ !! the original done had ( addr -- ) |
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drop >r drop |
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begin |
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leave> |
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over r@ u>= |
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while |
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POSTPONE then |
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repeat |
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>leave rdrop ; immediate restrict |
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: LEAVE ( compilation -- ; run-time loop-sys -- ) \ core |
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POSTPONE ahead |
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>leave ; immediate restrict |
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: ?LEAVE ( compilation -- ; run-time f | f loop-sys -- ) \ gforth question-leave |
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POSTPONE 0= POSTPONE if |
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>leave ; immediate restrict |
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: DO ( compilation -- do-sys ; run-time w1 w2 -- loop-sys ) \ core |
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POSTPONE (do) |
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POSTPONE begin drop do-dest |
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( 0 0 0 >leave ) ; immediate restrict |
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: ?do-like ( -- do-sys ) |
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( 0 0 0 >leave ) |
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>mark >leave |
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POSTPONE begin drop do-dest ; |
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: ?DO ( compilation -- do-sys ; run-time w1 w2 -- | loop-sys ) \ core-ext question-do |
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POSTPONE (?do) ?do-like ; immediate restrict |
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: +DO ( compilation -- do-sys ; run-time n1 n2 -- | loop-sys ) \ gforth plus-do |
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POSTPONE (+do) ?do-like ; immediate restrict |
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: U+DO ( compilation -- do-sys ; run-time u1 u2 -- | loop-sys ) \ gforth u-plus-do |
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POSTPONE (u+do) ?do-like ; immediate restrict |
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: -DO ( compilation -- do-sys ; run-time n1 n2 -- | loop-sys ) \ gforth minus-do |
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POSTPONE (-do) ?do-like ; immediate restrict |
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: U-DO ( compilation -- do-sys ; run-time u1 u2 -- | loop-sys ) \ gforth u-minus-do |
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POSTPONE (u-do) ?do-like ; immediate restrict |
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: FOR ( compilation -- do-sys ; run-time u -- loop-sys ) \ gforth |
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POSTPONE (for) |
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POSTPONE begin drop do-dest |
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( 0 0 0 >leave ) ; immediate restrict |
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\ LOOP etc. are just like UNTIL |
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: loop-like ( do-sys xt1 xt2 -- ) |
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>r >r 0 cs-pick swap cell - swap 1 cs-roll r> r> rot do-dest? |
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until-like POSTPONE done POSTPONE unloop ; |
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: LOOP ( compilation do-sys -- ; run-time loop-sys1 -- | loop-sys2 ) \ core |
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['] (loop) ['] (loop)-lp+!# loop-like ; immediate restrict |
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: +LOOP ( compilation do-sys -- ; run-time loop-sys1 n -- | loop-sys2 ) \ core plus-loop |
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['] (+loop) ['] (+loop)-lp+!# loop-like ; immediate restrict |
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\ !! should the compiler warn about +DO..-LOOP? |
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: -LOOP ( compilation do-sys -- ; run-time loop-sys1 u -- | loop-sys2 ) \ gforth minus-loop |
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['] (-loop) ['] (-loop)-lp+!# loop-like ; immediate restrict |
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\ A symmetric version of "+LOOP". I.e., "-high -low ?DO -inc S+LOOP" |
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\ will iterate as often as "high low ?DO inc S+LOOP". For positive |
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\ increments it behaves like "+LOOP". Use S+LOOP instead of +LOOP for |
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\ negative increments. |
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: S+LOOP ( compilation do-sys -- ; run-time loop-sys1 n -- | loop-sys2 ) \ gforth s-plus-loop |
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['] (s+loop) ['] (s+loop)-lp+!# loop-like ; immediate restrict |
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: DO postpone (do) here ; immediate restrict |
: NEXT ( compilation do-sys -- ; run-time loop-sys1 -- | loop-sys2 ) \ gforth |
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['] (next) ['] (next)-lp+!# loop-like ; immediate restrict |
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: ?DO postpone (?do) (leave) here ; |
\ Structural Conditionals 12dec92py |
immediate restrict |
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: FOR postpone (for) here ; immediate restrict |
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: loop] dup <resolve 2 cells - postpone done postpone unloop ; |
: EXIT ( compilation -- ; run-time nest-sys -- ) \ core |
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0 adjust-locals-size |
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POSTPONE ;s |
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POSTPONE unreachable ; immediate restrict |
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: LOOP sys? postpone (loop) loop] ; immediate restrict |
: ?EXIT ( -- ) ( compilation -- ; run-time nest-sys f -- | nest-sys ) \ gforth |
: +LOOP sys? postpone (+loop) loop] ; immediate restrict |
POSTPONE if POSTPONE exit POSTPONE then ; immediate restrict |
: S+LOOP \ general |
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\ A symmetric version of "+LOOP". I.e., "-high -low ?DO -inc S+LOOP" will iterate as often as "high low ?DO inc S+LOOP". For positive increments it behaves like "+LOOP". Use S+LOOP instead of +LOOP for negative increments. |
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sys? postpone (s+loop) loop] ; immediate restrict |
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: NEXT sys? postpone (next) loop] ; immediate restrict |
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\ Strings 22feb93py |
\ Strings 22feb93py |
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Line 366 Variable leavings
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Line 948 Variable leavings
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r> r> dup count + aligned >r swap >r ; restrict |
r> r> dup count + aligned >r swap >r ; restrict |
: (.") "lit count type ; restrict |
: (.") "lit count type ; restrict |
: (S") "lit count ; restrict |
: (S") "lit count ; restrict |
: SLiteral postpone (S") here over char+ allot place align ; |
: SLiteral ( Compilation c-addr1 u ; run-time -- c-addr2 u ) \ string |
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postpone (S") here over char+ allot place align ; |
immediate restrict |
immediate restrict |
: S" [char] " parse state @ IF postpone SLiteral THEN ; |
create s"-buffer /line chars allot |
immediate |
: S" ( compilation 'ccc"' -- ; run-time -- c-addr u ) \ core,file s-quote |
: ." state @ IF postpone (.") ," align |
[char] " parse |
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state @ |
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IF |
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postpone SLiteral |
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ELSE |
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/line min >r s"-buffer r@ cmove |
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s"-buffer r> |
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THEN ; immediate |
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: ." ( compilation 'ccc"' -- ; run-time -- ) \ core dot-quote |
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state @ IF postpone (.") ," align |
ELSE [char] " parse type THEN ; immediate |
ELSE [char] " parse type THEN ; immediate |
: ( [char] ) parse 2drop ; immediate |
: ( ( compilation 'ccc<close-paren>' -- ; run-time -- ) \ core,file paren |
: \ source >in ! drop ; immediate |
BEGIN |
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>in @ [char] ) parse nip >in @ rot - = |
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WHILE |
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loadfile @ IF |
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refill 0= abort" missing ')' in paren comment" |
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THEN |
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REPEAT ; immediate |
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: \ ( -- ) \ 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 ( -- ) \ gforth 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 |
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: (abort") "lit >r IF r> "error ! -2 throw THEN |
: (abort") |
rdrop ; |
"lit >r |
: abort" postpone (abort") ," ; immediate restrict |
IF |
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r> "error ! -2 throw |
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THEN |
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rdrop ; |
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: abort" ( compilation 'ccc"' -- ; run-time f -- ) \ core,exception-ext abort-quote |
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postpone (abort") ," ; immediate restrict |
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\ Header states 23feb93py |
\ Header states 23feb93py |
|
|
: flag! ( 8b -- ) last @ cell+ tuck c@ xor swap c! ; |
: flag! ( 8b -- ) |
|
last @ dup 0= abort" last word was headerless" |
|
cell+ tuck c@ xor swap c! ; |
: immediate $20 flag! ; |
: immediate $20 flag! ; |
\ : restrict $40 flag! ; |
: restrict $40 flag! ; |
' noop alias restrict |
\ ' noop alias restrict |
|
|
\ Header 23feb93py |
\ Header 23feb93py |
|
|
Line 395 Variable leavings
|
Line 1011 Variable leavings
|
\ information through global variables), but they are useful for dealing |
\ information through global variables), but they are useful for dealing |
\ with existing/independent defining words |
\ with existing/independent defining words |
|
|
defer header |
defer (header) |
|
defer header ( -- ) \ gforth |
: name, ( "name" -- ) |
' (header) IS header |
name c@ 1+ chars allot align ; |
|
|
: string, ( c-addr u -- ) \ gforth |
|
\ puts down string as cstring |
|
dup c, here swap chars dup allot move ; |
|
|
|
: name, ( "name" -- ) \ gforth |
|
name name-too-short? name-too-long? |
|
string, cfalign ; |
: 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 406 defer header
|
Line 1029 defer header
|
|
|
: input-stream ( -- ) \ general |
: input-stream ( -- ) \ general |
\ switches back to getting the name from the input stream ; |
\ switches back to getting the name from the input stream ; |
['] input-stream-header IS header ; |
['] input-stream-header IS (header) ; |
|
|
' input-stream-header IS header |
' input-stream-header IS (header) |
|
|
\ !! make that a 2variable |
\ !! make that a 2variable |
create nextname-string 2 cells allot \ should we use a buffer that keeps the name? |
create nextname-buffer 32 chars allot |
|
|
: nextname-header ( -- ) |
: nextname-header ( -- ) |
\ !! f83-implementation-dependent |
\ !! f83-implementation-dependent |
nextname-string 2@ |
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 ; |
|
|
\ the next name is given in the string |
\ the next name is given in the string |
: nextname ( c-addr u -- ) \ general |
: nextname ( c-addr u -- ) \ gforth |
nextname-string 2! |
name-too-long? |
['] nextname-header IS header ; |
nextname-buffer c! ( c-addr ) |
|
nextname-buffer count move |
|
['] nextname-header IS (header) ; |
|
|
: noname-header ( -- ) |
: noname-header ( -- ) |
0 last ! |
0 last ! cfalign |
input-stream ; |
input-stream ; |
|
|
: noname ( -- ) \ general |
: noname ( -- ) \ gforth |
\ the next defined word remains anonymous. The xt of that word is given by lastxt |
\ the next defined word remains anonymous. The xt of that word is given by lastxt |
['] noname-header IS header ; |
['] noname-header IS (header) ; |
|
|
: lastxt ( -- xt ) \ general |
: 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 |
\ 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 @ ; |
lastcfa @ ; |
|
|
: Alias ( cfa "name" -- ) |
: Alias ( cfa "name" -- ) \ gforth |
Header reveal , $80 flag! ; |
Header reveal , $80 flag! ; |
|
|
: name>string ( nfa -- addr count ) |
: name>string ( nfa -- addr count ) \ gforth name-to-string |
cell+ count $1F and ; |
cell+ count $1F and ; |
|
|
Create ??? ," ???" |
Create ??? 0 , 3 c, char ? c, char ? c, char ? c, |
: >name ( cfa -- nfa ) |
: >name ( cfa -- nfa ) \ gforth to-name |
$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 |
drop ??? ( wouldn't 0 be better? ) ; |
drop ??? ( wouldn't 0 be better? ) ; |
|
|
\ indirect threading 17mar93py |
\ threading 17mar93py |
|
|
: cfa, ( code-address -- ) |
: cfa, ( code-address -- ) \ gforth cfa-comma |
here lastcfa ! |
here |
here 0 A, 0 , code-address! ; |
dup lastcfa ! |
: compile, ( xt -- ) A, ; |
0 A, 0 , code-address! ; |
: !does ( addr -- ) lastcfa @ does-code! ; |
: compile, ( xt -- ) \ core-ext compile-comma |
: (;code) ( R: addr -- ) r> /does-handler + !does ; |
A, ; |
|
: !does ( addr -- ) \ gforth store-does |
|
lastxt does-code! ; |
|
: (does>) ( R: addr -- ) |
|
r> /does-handler + !does ; |
: dodoes, ( -- ) |
: dodoes, ( -- ) |
here /does-handler allot does-handler! ; |
here /does-handler allot does-handler! ; |
|
|
\ direct threading is implementation dependent |
: Create ( -- ) \ core |
|
Header reveal dovar: cfa, ; |
: Create Header reveal [ :dovar ] ALiteral cfa, ; |
|
|
|
\ DOES> 17mar93py |
\ DOES> 17mar93py |
|
|
: DOES> state @ IF postpone (;code) dodoes, |
: DOES> ( compilation colon-sys1 -- colon-sys2 ; run-time nest-sys -- ) \ core does |
ELSE dodoes, here !does 0 ] THEN ; immediate |
state @ |
|
IF |
|
;-hook postpone (does>) ?struc dodoes, |
|
ELSE |
|
align dodoes, here !does ] |
|
THEN |
|
defstart :-hook ; immediate |
|
|
\ Create Variable User Constant 17mar93py |
\ Create Variable User Constant 17mar93py |
|
|
: Variable Create 0 , ; |
: Variable ( -- ) \ core |
: AVariable Create 0 A, ; |
Create 0 , ; |
|
: AVariable ( -- ) \ gforth |
|
Create 0 A, ; |
: 2VARIABLE ( "name" -- ) \ double |
: 2VARIABLE ( "name" -- ) \ double |
create 0 , 0 , ; |
create 0 , 0 , ; |
|
|
: User Variable ; |
: User |
: AUser AVariable ; |
Variable ; |
|
: AUser |
: (Constant) Header reveal [ :docon ] ALiteral cfa, ; |
AVariable ; |
: Constant (Constant) , ; |
|
: AConstant (Constant) A, ; |
: (Constant) Header reveal docon: cfa, ; |
: 2Constant ( w1 w2 "name" -- ) \ double |
: Constant ( w -- ) \ core |
Create 2, DOES> 2@ ; |
(Constant) , ; |
|
: AConstant ( addr -- ) \ gforth |
|
(Constant) A, ; |
|
|
|
: 2Constant ( d -- ) \ double |
|
Create ( w1 w2 "name" -- ) |
|
2, |
|
DOES> ( -- w1 w2 ) |
|
2@ ; |
|
|
\ IS Defer What's Defers TO 24feb93py |
\ IS Defer What's Defers TO 24feb93py |
|
|
: Defer Create ['] noop A, DOES> @ execute ; |
: Defer ( -- ) \ gforth |
|
\ !! shouldn't it be initialized with abort or something similar? |
|
Header Reveal dodefer: cfa, |
|
['] noop A, ; |
|
\ Create ( -- ) |
|
\ ['] noop A, |
|
\ DOES> ( ??? ) |
|
\ perform ; |
|
|
: IS ( addr "name" -- ) |
: IS ( addr "name" -- ) \ gforth |
' >body |
' >body |
state @ |
state @ |
IF postpone ALiteral postpone ! |
IF postpone ALiteral postpone ! |
ELSE ! |
ELSE ! |
THEN ; immediate |
THEN ; immediate |
' IS Alias TO immediate |
' IS Alias TO ( addr "name" -- ) \ core-ext |
|
immediate |
|
|
: What's ( "name" -- addr ) ' >body |
: What's ( "name" -- addr ) \ gforth |
state @ IF postpone ALiteral postpone @ ELSE @ THEN ; |
' >body |
immediate |
state @ |
: Defers ( "name" -- ) ' >body @ compile, ; |
IF |
immediate restrict |
postpone ALiteral postpone @ |
|
ELSE |
|
@ |
|
THEN ; immediate |
|
: Defers ( "name" -- ) \ gforth |
|
' >body @ compile, ; immediate |
|
|
\ : ; 24feb93py |
\ : ; 24feb93py |
|
|
: EXIT ( -- ) postpone ;s ; immediate |
defer :-hook ( sys1 -- sys2 ) |
|
defer ;-hook ( sys2 -- sys1 ) |
|
|
: : ( -- colon-sys ) Header [ :docol ] ALiteral cfa, 0 ] ; |
: : ( -- colon-sys ) \ core colon |
: ; ( colon-sys -- ) ?struc postpone exit reveal postpone [ ; |
Header docol: cfa, defstart ] :-hook ; |
immediate restrict |
: ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon |
: :noname ( -- xt colon-sys ) here [ ' : @ ] ALiteral cfa, 0 ] ; |
;-hook ?struc postpone exit reveal postpone [ ; immediate restrict |
|
|
|
: :noname ( -- xt colon-sys ) \ core-ext colon-no-name |
|
0 last ! |
|
here docol: cfa, 0 ] :-hook ; |
|
|
\ Search list handling 23feb93py |
\ Search list handling 23feb93py |
|
|
AVariable current |
AVariable current ( -- addr ) \ gforth |
|
|
: last? ( -- false / nfa nfa ) last @ ?dup ; |
: last? ( -- false / nfa nfa ) |
: (reveal) ( -- ) last? |
last @ ?dup ; |
IF dup @ 0< |
: (reveal) ( -- ) |
IF current @ @ over ! current @ ! |
last? |
ELSE drop THEN THEN ; |
IF |
|
dup @ 0< |
|
IF |
|
current @ @ over ! current @ ! |
|
ELSE |
|
drop |
|
THEN |
|
THEN ; |
|
|
\ object oriented search list 17mar93py |
\ object oriented search list 17mar93py |
|
|
|
\ word list structure: |
|
|
|
struct |
|
1 cells: field find-method \ xt: ( c_addr u wid -- name-id ) |
|
1 cells: field reveal-method \ xt: ( -- ) \ used by dofield:, must be field |
|
1 cells: field rehash-method \ xt: ( wid -- ) |
|
\ \ !! what else |
|
end-struct wordlist-map-struct |
|
|
|
struct |
|
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-link \ link field to other wordlists |
|
1 cells: field wordlist-extend \ points to wordlist extensions (eg hash) |
|
end-struct wordlist-struct |
|
|
|
: f83find ( addr len wordlist -- nfa / false ) @ (f83find) ; |
|
|
\ Search list table: find reveal |
\ Search list table: find reveal |
|
Create f83search ' f83find A, ' (reveal) A, ' drop A, |
|
|
Create f83search ' (f83find) A, ' (reveal) A, |
|
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 ! |
|
|
: (search-wordlist) ( addr count wid -- nfa / false ) |
: (search-wordlist) ( addr count wid -- nfa / false ) |
dup @ swap cell+ @ @ execute ; |
dup wordlist-map @ find-method perform ; |
|
|
: search-wordlist ( addr count wid -- 0 / xt +-1 ) |
: search-wordlist ( addr count wid -- 0 / xt +-1 ) \ search |
(search-wordlist) dup IF found THEN ; |
(search-wordlist) dup IF found THEN ; |
|
|
Variable warnings G -1 warnings T ! |
Variable warnings ( -- addr ) \ gforth |
|
G -1 warnings T ! |
|
|
: check-shadow ( addr count wid -- ) |
: check-shadow ( addr count wid -- ) |
\ prints a warning if the string is already present in the wordlist |
\ prints a warning if the string is already present in the wordlist |
Line 557 Variable warnings G -1 warnings T !
|
Line 1245 Variable warnings G -1 warnings T !
|
then |
then |
2drop 2drop ; |
2drop 2drop ; |
|
|
: find ( addr -- cfa +-1 / string false ) dup |
: sfind ( c-addr u -- xt n / 0 ) \ gforth |
count search @ search-wordlist dup IF rot drop THEN ; |
lookup @ search-wordlist ; |
|
|
|
: find ( addr -- cfa +-1 / string false ) \ core,search |
|
\ !! not ANS conformant: returns +-2 for restricted words |
|
dup count sfind dup if |
|
rot drop |
|
then ; |
|
|
: reveal ( -- ) |
: reveal ( -- ) \ gforth |
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 perform ; |
|
|
: ' ( "name" -- addr ) name find 0= no.extensions ; |
: rehash ( wid -- ) |
: ['] ( "name" -- addr ) ' postpone ALiteral ; immediate |
dup wordlist-map @ rehash-method perform ; |
|
|
|
: ' ( "name" -- addr ) \ core tick |
|
name sfind 0= if -&13 bounce then ; |
|
: ['] ( compilation "name" -- ; run-time --addr ) \ core bracket-tick |
|
' postpone ALiteral ; immediate |
\ Input 13feb93py |
\ Input 13feb93py |
|
|
07 constant #bell |
07 constant #bell ( -- c ) \ gforth |
08 constant #bs |
08 constant #bs ( -- c ) \ gforth |
7F constant #del |
09 constant #tab ( -- c ) \ gforth |
0D constant #cr \ the newline key code |
7F constant #del ( -- c ) \ gforth |
0A constant #lf |
0D constant #cr ( -- c ) \ gforth |
|
\ the newline key code |
|
0C constant #ff ( -- c ) \ gforth |
|
0A constant #lf ( -- c ) \ gforth |
|
|
: bell #bell emit ; |
: bell #bell emit ; |
|
: cr ( -- ) \ core |
|
\ emit a newline |
|
#lf ( sic! ) emit ; |
|
|
: 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 594 Variable warnings G -1 warnings T !
|
Line 1299 Variable warnings G -1 warnings T !
|
: (ret) type-rest drop true space ; |
: (ret) type-rest drop true space ; |
: 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 ; |
|
: eof 2 pick 0= IF bye ELSE (ret) THEN ; |
|
|
Create crtlkeys |
Create ctrlkeys |
] false false back false false false forw false |
] false false back false eof 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 [ |
|
|
|
defer everychar |
|
' noop IS everychar |
|
|
: decode ( max span addr pos1 key -- max span addr pos2 flag ) |
: decode ( max span addr pos1 key -- max span addr pos2 flag ) |
|
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 + perform EXIT THEN |
>r 2over = IF rdrop bell 0 EXIT THEN |
>r 2over = IF rdrop bell 0 EXIT THEN |
r> (ins) 0 ; |
r> (ins) 0 ; |
|
|
\ decode should better use a table for control key actions |
\ decode should better use a table for control key actions |
\ to define keyboard bindings later |
\ to define keyboard bindings later |
|
|
: accept ( addr len -- len ) |
: accept ( addr len -- len ) \ core |
dup 0< IF abs over dup 1 chars - c@ tuck type |
dup 0< IF abs over dup 1 chars - c@ tuck type |
\ this allows to edit given strings |
\ this allows to edit given strings |
ELSE 0 THEN rot over |
ELSE 0 THEN rot over |
Line 619 Create crtlkeys
|
Line 1329 Create crtlkeys
|
|
|
\ Output 13feb93py |
\ Output 13feb93py |
|
|
DEFER type \ defer type for a output buffer or fast |
: (type) ( c-addr u -- ) \ gforth |
\ screen write |
outfile-id write-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? |
|
; |
|
|
: (type) ( addr len -- ) |
Defer type ( c-addr u -- ) \ core |
bounds ?DO I c@ emit LOOP ; |
\ defer type for a output buffer or fast |
|
\ screen write |
|
|
' (TYPE) IS Type |
' (type) IS Type |
|
|
\ DEFER Emit |
: (emit) ( c -- ) \ gforth |
|
outfile-id emit-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? |
|
; |
|
|
\ ' (Emit) IS Emit |
Defer emit ( c -- ) \ core |
|
' (Emit) IS Emit |
|
|
\ : form ( -- rows cols ) &24 &80 ; |
Defer key ( -- c ) \ core |
\ form should be implemented using TERMCAPS or CURSES |
' (key) IS key |
\ : rows form drop ; |
|
\ : cols form nip ; |
|
|
|
\ Query 07apr93py |
\ Query 07apr93py |
|
|
: refill ( -- flag ) |
: refill ( -- flag ) \ core-ext,block-ext,file-ext |
|
blk @ IF 1 blk +! true 0 >in ! 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 sourceline# 0< IF 2drop false EXIT THEN |
ELSE linestart @ IF 2drop false EXIT THEN |
|
accept true |
accept true |
THEN |
THEN |
1 loadline +! |
1 loadline +! |
swap #tib ! >in off ; |
swap #tib ! 0 >in ! ; |
|
|
: Query ( -- ) loadfile off refill drop ; |
: Query ( -- ) \ core-ext |
|
\ obsolescent |
|
loadfile off blk off refill drop ; |
|
|
\ File specifiers 11jun93jaw |
\ File specifiers 11jun93jaw |
|
|
Line 657 DEFER type \ defer type for a outpu
|
Line 1372 DEFER type \ defer type for a outpu
|
\ 1 c, here char r c, 0 c, 0 c, 0 c, char b c, 0 c, |
\ 1 c, here char r c, 0 c, 0 c, 0 c, char b c, 0 c, |
\ 2 c, here char r c, char + c, 0 c, |
\ 2 c, here char r c, char + c, 0 c, |
\ 2 c, here char w c, char + c, 0 c, align |
\ 2 c, here char w c, char + c, 0 c, align |
4 Constant w/o |
4 Constant w/o ( -- fam ) \ file w-o |
2 Constant r/w |
2 Constant r/w ( -- fam ) \ file r-w |
0 Constant r/o |
0 Constant r/o ( -- fam ) \ file r-o |
|
|
\ BIN WRITE-LINE 11jun93jaw |
\ BIN WRITE-LINE 11jun93jaw |
|
|
\ : bin dup 1 chars - c@ |
\ : bin dup 1 chars - c@ |
\ r/o 4 chars + over - dup >r swap move r> ; |
\ r/o 4 chars + over - dup >r swap move r> ; |
|
|
: bin 1+ ; |
: bin ( fam1 -- fam2 ) \ file |
|
1 or ; |
|
|
create nl$ 1 c, A c, 0 c, \ gnu includes usually a cr in dos |
create nl$ 1 c, A c, 0 c, \ gnu includes usually a cr in dos |
\ or not unix environments if |
\ or not unix environments if |
\ bin is not selected |
\ bin is not selected |
|
|
: write-line dup >r write-file ?dup IF r> drop EXIT THEN |
: write-line ( c-addr u fileid -- ior ) \ file |
nl$ count r> write-file ; |
dup >r write-file |
|
?dup IF |
|
r> drop EXIT |
|
THEN |
|
nl$ count r> write-file ; |
|
|
\ include-file 07apr93py |
\ include-file 07apr93py |
|
|
: include-file ( i*x fid -- j*x ) |
: push-file ( -- ) r> |
linestart @ >r loadline @ >r loadfile @ >r |
sourceline# >r loadfile @ >r |
blk @ >r >tib @ >r #tib @ dup >r >in @ >r |
blk @ >r tibstack @ >r >tib @ >r #tib @ >r |
|
>tib @ tibstack @ = IF r@ tibstack +! THEN |
>tib +! loadfile ! |
tibstack @ >tib ! >in @ >r >r ; |
0 loadline ! blk off |
|
BEGIN refill WHILE interpret REPEAT |
: pop-file ( throw-code -- throw-code ) |
loadfile @ close-file throw |
dup IF |
|
source >in @ sourceline# sourcefilename |
r> >in ! r> #tib ! r> >tib ! r> blk ! |
error-stack dup @ dup 1+ |
r> loadfile ! r> loadline ! r> linestart ! ; |
max-errors 1- min error-stack ! |
|
6 * cells + cell+ |
|
5 cells bounds swap DO |
|
I ! |
|
-1 cells +LOOP |
|
THEN |
|
r> |
|
r> >in ! r> #tib ! r> >tib ! r> tibstack ! r> blk ! |
|
r> loadfile ! r> loadline ! >r ; |
|
|
|
: read-loop ( i*x -- j*x ) |
|
BEGIN refill WHILE interpret REPEAT ; |
|
|
|
: include-file ( i*x fid -- j*x ) \ file |
|
push-file loadfile ! |
|
0 loadline ! blk off ['] read-loop catch |
|
loadfile @ close-file swap 2dup or |
|
pop-file drop throw throw ; |
|
|
|
create pathfilenamebuf 256 chars allot \ !! make this grow on demand |
|
|
|
\ : check-file-prefix ( addr len -- addr' len' flag ) |
|
\ dup 0= IF true EXIT THEN |
|
\ over c@ '/ = IF true EXIT THEN |
|
\ over 2 S" ./" compare 0= IF true EXIT THEN |
|
\ over 3 S" ../" compare 0= IF true EXIT THEN |
|
\ over 2 S" ~/" compare 0= |
|
\ IF 1 /string |
|
\ S" HOME" getenv tuck pathfilenamebuf swap move |
|
\ 2dup + >r pathfilenamebuf + swap move |
|
\ pathfilenamebuf r> true |
|
\ ELSE false |
|
\ THEN ; |
|
|
|
: open-path-file ( c-addr1 u1 -- file-id c-addr2 u2 ) \ gforth |
|
\ opens a file for reading, searching in the path for it (unless |
|
\ the filename contains a slash); c-addr2 u2 is the full filename |
|
\ (valid until the next call); if the file is not found (or in |
|
\ case of other errors for each try), -38 (non-existant file) is |
|
\ thrown. Opening for other access modes makes little sense, as |
|
\ the path will usually contain dirs that are only readable for |
|
\ the user |
|
\ !! use file-status to determine access mode? |
|
2dup [char] / scan nip ( 0<> ) |
|
if \ the filename contains a slash |
|
2dup r/o open-file throw ( c-addr1 u1 file-id ) |
|
-rot >r pathfilenamebuf r@ cmove ( file-id R: u1 ) |
|
pathfilenamebuf r> EXIT |
|
then |
|
pathdirs 2@ 0 |
|
\ check-file-prefix 0= |
|
\ IF pathdirs 2@ 0 |
|
?DO ( c-addr1 u1 dirnamep ) |
|
dup >r 2@ dup >r pathfilenamebuf swap cmove ( addr u ) |
|
2dup pathfilenamebuf r@ chars + swap cmove ( addr u ) |
|
pathfilenamebuf over r> + dup >r r/o open-file 0= |
|
IF ( addr u file-id ) |
|
nip nip r> rdrop 0 LEAVE |
|
THEN |
|
rdrop drop r> cell+ cell+ |
|
LOOP |
|
\ ELSE 2dup open-file throw -rot THEN |
|
0<> -&38 and throw ( file-id u2 ) |
|
pathfilenamebuf swap ; |
|
|
|
create included-files 0 , 0 , ( pointer to and count of included files ) |
|
here ," the terminal" dup c@ swap 1 + swap , A, here 2 cells - |
|
create image-included-files 1 , A, ( pointer to and count of included files ) |
|
\ included-files points to ALLOCATEd space, while image-included-files |
|
\ points to ALLOTed objects, so it survives a save-system |
|
|
|
: loadfilename ( -- a-addr ) |
|
\ a-addr 2@ produces the current file name ( c-addr u ) |
|
included-files 2@ drop loadfilename# @ 2* cells + ; |
|
|
|
: sourcefilename ( -- c-addr u ) \ gforth |
|
\ the name of the source file which is currently the input |
|
\ source. The result is valid only while the file is being |
|
\ loaded. If the current input source is no (stream) file, the |
|
\ result is undefined. |
|
loadfilename 2@ ; |
|
|
|
: sourceline# ( -- u ) \ gforth sourceline-number |
|
\ the line number of the line that is currently being interpreted |
|
\ from a (stream) file. The first line has the number 1. If the |
|
\ current input source is no (stream) file, the result is |
|
\ undefined. |
|
loadline @ ; |
|
|
|
: init-included-files ( -- ) |
|
image-included-files 2@ 2* cells save-string drop ( addr ) |
|
image-included-files 2@ nip included-files 2! ; |
|
|
|
: included? ( c-addr u -- f ) \ gforth |
|
\ true, iff filename c-addr u is in included-files |
|
included-files 2@ 0 |
|
?do ( c-addr u addr ) |
|
dup >r 2@ 2over compare 0= |
|
if |
|
2drop rdrop unloop |
|
true EXIT |
|
then |
|
r> cell+ cell+ |
|
loop |
|
2drop drop false ; |
|
|
|
: add-included-file ( c-addr u -- ) \ gforth |
|
\ add name c-addr u to included-files |
|
included-files 2@ tuck 1+ 2* cells resize throw |
|
swap 2dup 1+ included-files 2! |
|
2* cells + 2! ; |
|
|
|
: save-string ( addr1 u -- addr2 u ) \ gforth |
|
\ !! not a string, but a memblock word |
|
swap >r |
|
dup allocate throw |
|
swap 2dup r> -rot move ; |
|
|
|
: included1 ( i*x file-id c-addr u -- j*x ) \ gforth |
|
\ include the file file-id with the name given by c-addr u |
|
loadfilename# @ >r |
|
save-string add-included-file ( file-id ) |
|
included-files 2@ nip 1- loadfilename# ! |
|
['] include-file catch |
|
r> loadfilename# ! |
|
throw ; |
|
|
|
: included ( i*x addr u -- j*x ) \ file |
|
open-path-file included1 ; |
|
|
: included ( i*x addr u -- j*x ) |
: required ( i*x addr u -- j*x ) \ gforth |
r/o open-file throw include-file ; |
\ include the file with the name given by addr u, if it is not |
|
\ included already. Currently this works by comparing the name of |
|
\ the file (with path) against the names of earlier included |
|
\ files; however, it would probably be better to fstat the file, |
|
\ and compare the device and inode. The advantages would be: no |
|
\ problems with several paths to the same file (e.g., due to |
|
\ links) and we would catch files included with include-file and |
|
\ write a require-file. |
|
open-path-file 2dup included? |
|
if |
|
2drop close-file throw |
|
else |
|
included1 |
|
then ; |
|
|
\ HEX DECIMAL 2may93jaw |
\ HEX DECIMAL 2may93jaw |
|
|
: decimal a base ! ; |
: decimal ( -- ) \ core |
: hex 10 base ! ; |
a base ! ; |
|
: hex ( -- ) \ core-ext |
|
10 base ! ; |
|
|
\ DEPTH 9may93jaw |
\ DEPTH 9may93jaw |
|
|
: depth ( -- +n ) sp@ s0 @ swap - cell / ; |
: depth ( -- +n ) \ core |
|
sp@ s0 @ swap - cell / ; |
|
: clearstack ( ... -- ) |
|
s0 @ sp! ; |
|
|
\ INCLUDE 9may93jaw |
\ INCLUDE 9may93jaw |
|
|
: include |
: include ( "file" -- ) \ gforth |
bl word count included ; |
name included ; |
|
|
|
: require ( "file" -- ) \ gforth |
|
name required ; |
|
|
\ RECURSE 17may93jaw |
\ RECURSE 17may93jaw |
|
|
: recurse last @ cell+ name> a, ; immediate restrict |
: recurse ( compilation -- ; run-time ?? -- ?? ) \ core |
\ !! does not work with anonymous words; use lastxt compile, |
lastxt compile, ; immediate restrict |
|
: recursive ( -- ) \ gforth |
|
reveal last off ; immediate |
|
|
\ */MOD */ 17may93jaw |
\ */MOD */ 17may93jaw |
|
|
: */mod >r m* r> sm/rem ; |
\ !! I think */mod should have the same rounding behaviour as / - anton |
|
: */mod ( n1 n2 n3 -- n4 n5 ) \ core star-slash-mod |
|
>r m* r> sm/rem ; |
|
|
: */ */mod nip ; |
: */ ( n1 n2 n3 -- n4 ) \ core star-slash |
|
*/mod nip ; |
|
|
\ EVALUATE 17may93jaw |
\ EVALUATE 17may93jaw |
|
|
: evaluate ( c-addr len -- ) |
: evaluate ( c-addr len -- ) \ core,block |
linestart @ >r loadline @ >r loadfile @ >r |
push-file #tib ! >tib ! |
blk @ >r >tib @ >r #tib @ dup >r >in @ >r |
>in off blk off loadfile off -1 loadline ! |
|
['] interpret catch |
>tib +! dup #tib ! >tib @ swap move |
pop-file throw ; |
>in off blk off loadfile off -1 linestart ! |
|
|
|
BEGIN interpret >in @ #tib @ u>= UNTIL |
: abort ( ?? -- ?? ) \ core,exception-ext |
|
-1 throw ; |
r> >in ! r> #tib ! r> >tib ! r> blk ! |
|
r> loadfile ! r> loadline ! r> linestart ! ; |
|
|
|
|
|
: abort -1 throw ; |
|
|
|
\+ environment? true ENV" CORE" |
\+ environment? true ENV" CORE" |
\ core wordset is now complete! |
\ core wordset is now complete! |
Line 747 Defer .status
|
Line 1615 Defer .status
|
|
|
\ DOERROR (DOERROR) 13jun93jaw |
\ 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 ! ; |
|
|
|
: typewhite ( addr u -- ) \ gforth |
|
\ like type, but white space is printed instead of the characters |
|
bounds ?do |
|
i c@ 9 = if \ check for tab |
|
9 |
|
else |
|
bl |
|
then |
|
emit |
|
loop ; |
|
|
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 @ IF ." Error in line: " Loadline @ . cr THEN |
sourceline# IF |
cr source type cr |
source >in @ sourceline# 0 0 .error-frame |
source drop >in @ -trailing |
THEN |
here c@ 1F min dup >r - 1- 0 max nip |
error-stack @ 0 ?DO |
dup spaces IF ." ^" THEN r> 0 ?DO ." -" LOOP ." ^" |
-1 error-stack +! |
dup -2 = |
error-stack dup @ 6 * cells + cell+ |
IF "error @ ?dup IF cr count type THEN drop |
6 cells bounds DO |
ELSE .error THEN ; |
I @ |
|
cell +LOOP |
|
.error-frame |
|
LOOP |
|
dup -2 = |
|
IF |
|
"error @ ?dup |
|
IF |
|
cr count type |
|
THEN |
|
drop |
|
ELSE |
|
.error |
|
THEN |
|
normal-dp dpp ! ; |
|
|
' (DoError) IS DoError |
' (DoError) IS DoError |
|
|
: quit r0 @ rp! handler off >tib @ >r |
: quit ( ?? -- ?? ) \ core |
BEGIN postpone [ ['] 'quit catch dup WHILE |
r0 @ rp! handler off >tib @ >r |
DoError r@ >tib ! |
BEGIN |
REPEAT drop r> >tib ! ; |
postpone [ |
|
['] 'quit CATCH dup |
|
WHILE |
|
DoError r@ >tib ! r@ tibstack ! |
|
REPEAT |
|
drop r> >tib ! ; |
|
|
\ Cold 13feb93py |
\ Cold 13feb93py |
|
|
\ : .name ( name -- ) cell+ count $1F and type space ; |
\ : .name ( name -- ) name>string type space ; |
\ : 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 ) \ gforth cstring-to-sstring |
: arg ( n -- addr count ) cells argv @ + @ >len ; |
-1 0 scan 0 swap 1+ /string ; |
|
: arg ( n -- addr count ) \ gforth |
|
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 |
|
|
: get-args ( -- ) #tib off |
0 Value script? ( -- flag ) |
argc @ 1 ?DO I arg 2dup source + swap move |
|
#tib +! drop bl source + c! 1 #tib +! LOOP |
: process-path ( addr1 u1 -- addr2 u2 ) |
>in off #tib @ 0<> #tib +! ; |
\ addr1 u1 is a path string, addr2 u2 is an array of dir strings |
|
align here >r |
: script? ( -- flag ) 0 arg 1 arg dup 3 pick - /string compare 0= ; |
BEGIN |
|
over >r [char] : scan |
: cold ( -- ) argc @ 1 > |
over r> tuck - ( rest-str this-str ) |
IF script? |
dup |
IF 1 arg ['] included ELSE get-args ['] interpret THEN |
IF |
catch ?dup IF dup >r DoError cr r> (bye) THEN THEN |
2dup 1- chars + c@ [char] / <> |
." ANS FORTH-93 (c) 1993 by the ANS FORTH-93 Team" cr quit ; |
IF |
|
2dup chars + [char] / swap c! |
: boot ( **env **argv argc -- ) |
1+ |
argc ! argv ! env ! |
THEN |
sp@ dup s0 ! $10 + >tib ! rp@ r0 ! fp@ f0 ! cold ; |
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 |
|
required 1 |
|
ELSE |
|
I 1+ argc @ = IF s" " ELSE I 1+ arg THEN |
|
do-option |
|
THEN |
|
+LOOP |
|
r> >tib ! ; |
|
|
|
Defer 'cold ' noop IS 'cold |
|
|
|
: cold ( -- ) \ gforth |
|
stdout TO outfile-id |
|
pathstring 2@ process-path pathdirs 2! |
|
init-included-files |
|
'cold |
|
argc @ 1 > |
|
IF |
|
true to script? |
|
['] process-args catch ?dup |
|
IF |
|
dup >r DoError cr r> negate (bye) |
|
THEN |
|
cr |
|
THEN |
|
false to script? |
|
." 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" |
|
loadline off quit ; |
|
|
|
: license ( -- ) \ gforth |
|
cr |
|
." This program is free software; you can redistribute it and/or modify" cr |
|
." it under the terms of the GNU General Public License as published by" cr |
|
." the Free Software Foundation; either version 2 of the License, or" cr |
|
." (at your option) any later version." cr cr |
|
|
|
." This program is distributed in the hope that it will be useful," cr |
|
." but WITHOUT ANY WARRANTY; without even the implied warranty of" cr |
|
." MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the" cr |
|
." GNU General Public License for more details." cr cr |
|
|
|
." You should have received a copy of the GNU General Public License" cr |
|
." along with this program; if not, write to the Free Software" cr |
|
." Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA." cr ; |
|
|
|
: boot ( path **argv argc -- ) |
|
argc ! argv ! cstring>sstring pathstring 2! main-task up! |
|
sp@ dup s0 ! $10 + dup >tib ! tibstack ! #tib off >in off |
|
rp@ r0 ! fp@ f0 ! ['] cold catch DoError bye ; |
|
|
: bye cr 0 (bye) ; |
: bye ( -- ) \ tools-ext |
|
script? 0= IF cr THEN 0 (bye) ; |
|
|
\ **argv may be scanned by the C starter to get some important |
\ **argv may be scanned by the C starter to get some important |
\ information, as -display and -geometry for an X client FORTH |
\ information, as -display and -geometry for an X client FORTH |