version 1.2, 1996/09/23 08:52:49
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version 1.18, 1997/03/19 18:27:16
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\ Idea and implementation: Bernd Paysan (py) |
\ Idea and implementation: Bernd Paysan (py) |
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\ Log: ', '- usw. durch [char] ... ersetzt |
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\ man sollte die unterschiedlichen zahlensysteme |
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\ mit $ und & zumindest im interpreter weglassen |
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\ schon erledigt! |
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\ 11may93jaw |
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\ name> 0= nicht vorhanden 17may93jaw |
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\ nfa can be lfa or nfa! |
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\ find splited into find and (find) |
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\ (find) for later use 17may93jaw |
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\ search replaced by lookup because |
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\ it is a word of the string wordset |
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\ 20may93jaw |
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\ postpone added immediate 21may93jaw |
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\ to added immediate 07jun93jaw |
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\ cfa, header put "here lastcfa !" in |
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\ cfa, this is more logical |
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\ and noname: works wothout |
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\ extra "here lastcfa !" 08jun93jaw |
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\ (parse-white) thrown out |
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\ refill added outer trick |
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\ to show there is something |
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\ going on 09jun93jaw |
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\ leave ?leave somebody forgot UNLOOP!!! 09jun93jaw |
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\ leave ?leave unloop thrown out |
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\ unloop after loop is used 10jun93jaw |
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HEX |
HEX |
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\ labels for some code addresses |
\ labels for some code addresses |
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doer? :docon [IF] |
: docon: ( -- addr ) \ gforth |
: docon: ( -- addr ) \ gforth |
\ the code address of a @code{CONSTANT} |
\G the code address of a @code{CONSTANT} |
['] bl >code-address ; |
['] bl >code-address ; |
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[THEN] |
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: docol: ( -- addr ) \ gforth |
: docol: ( -- addr ) \ gforth |
\ the code address of a colon definition |
\G the code address of a colon definition |
['] docon: >code-address ; |
['] docol: >code-address ; |
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doer? :dovar [IF] |
: dovar: ( -- addr ) \ gforth |
: dovar: ( -- addr ) \ gforth |
\ the code address of a @code{CREATE}d word |
\G the code address of a @code{CREATE}d word |
['] udp >code-address ; |
['] udp >code-address ; |
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[THEN] |
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doer? :douser [IF] |
: douser: ( -- addr ) \ gforth |
: douser: ( -- addr ) \ gforth |
\ the code address of a @code{USER} variable |
\G the code address of a @code{USER} variable |
['] s0 >code-address ; |
['] s0 >code-address ; |
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[THEN] |
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doer? :dodefer [IF] |
: dodefer: ( -- addr ) \ gforth |
: dodefer: ( -- addr ) \ gforth |
\ the code address of a @code{defer}ed word |
\G the code address of a @code{defer}ed word |
['] source >code-address ; |
['] source >code-address ; |
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[THEN] |
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doer? :dofield [IF] |
: dofield: ( -- addr ) \ gforth |
: dofield: ( -- addr ) \ gforth |
\ the code address of a @code{field} |
\G the code address of a @code{field} |
['] reveal-method >code-address ; |
['] reveal-method >code-address ; |
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[THEN] |
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has-prims 0= [IF] |
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: dodoes: ( -- addr ) \ gforth |
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\G the code address of a @code{field} |
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['] spaces >code-address ; |
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[THEN] |
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NIL AConstant NIL \ gforth |
NIL AConstant NIL \ gforth |
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\ Aliases |
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' i Alias r@ ( -- w ; R: w -- w ) \ core r-fetch |
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\ copy w from the return stack to the data stack |
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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, |
Line 118 NIL AConstant NIL \ gforth
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Line 113 NIL AConstant NIL \ gforth
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LOOP ; |
LOOP ; |
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\ !! this is machine-dependent, but works on all but the strangest machines |
\ !! this is machine-dependent, but works on all but the strangest machines |
' faligned Alias maxaligned ( addr1 -- addr2 ) \ gforth |
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' falign Alias maxalign ( -- ) \ gforth |
: maxaligned ( addr -- f-addr ) \ float |
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[ /maxalign 1 - ] Literal + [ 0 /maxalign - ] Literal and ; |
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: maxalign ( -- ) \ float |
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here dup maxaligned swap |
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?DO |
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bl c, |
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LOOP ; |
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\ !! machine-dependent and won't work if "0 >body" <> "0 >body maxaligned" |
\ !! machine-dependent and won't work if "0 >body" <> "0 >body maxaligned" |
' maxaligned Alias cfaligned ( addr1 -- addr2 ) \ gforth |
' maxaligned Alias cfaligned ( addr1 -- addr2 ) \ gforth |
Line 178 $20 constant restrict-mask
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Line 179 $20 constant restrict-mask
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: bounds ( beg count -- end beg ) \ gforth |
: bounds ( beg count -- end beg ) \ gforth |
over + swap ; |
over + swap ; |
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: save-mem ( addr1 u -- addr2 u ) \ gforth |
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\ copy a memory block into a newly allocated region in the heap |
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swap >r |
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dup allocate throw |
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swap 2dup r> -rot move ; |
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: extend-mem ( addr1 u1 u -- addr addr2 u2 ) |
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\ extend memory block allocated from the heap by u aus |
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\ the (possibly reallocated piece is addr2 u2, the extension is at addr |
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over >r + dup >r resize throw |
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r> over r> + -rot ; |
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\ input stream primitives 23feb93py |
\ input stream primitives 23feb93py |
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: tib ( -- c-addr ) \ core-ext |
: tib ( -- c-addr ) \ core-ext |
Line 276 Defer source ( -- addr count ) \ core
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Line 265 Defer source ( -- addr count ) \ core
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: (compile) ( -- ) \ gforth |
: (compile) ( -- ) \ gforth |
r> dup cell+ >r @ compile, ; |
r> dup cell+ >r @ compile, ; |
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\ not the most efficient implementation of POSTPONE, but simple |
: postpone, ( w xt -- ) \ gforth postpone-comma |
: POSTPONE ( -- ) \ core |
\g Compiles the compilation semantics represented by @var{w xt}. |
COMP' swap POSTPONE aliteral compile, ; immediate restrict |
dup ['] execute = |
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if |
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drop compile, |
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else |
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dup ['] compile, = |
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if |
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drop POSTPONE (compile) compile, |
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else |
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swap POSTPONE aliteral compile, |
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then |
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then ; |
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: POSTPONE ( "name" -- ) \ core |
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\g Compiles the compilation semantics of @var{name}. |
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COMP' postpone, ; immediate restrict |
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: interpret/compile: ( interp-xt comp-xt "name" -- ) \ gforth |
: interpret/compile: ( interp-xt comp-xt "name" -- ) \ gforth |
Create immediate swap A, A, |
Create immediate swap A, A, |
Line 325 DOES>
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Line 328 DOES>
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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 character |
\ !! this saving and restoring base is an abomination! - anton |
\ !! this saving and restoring base is an abomination! - anton |
: getbase ( addr u -- addr' u' ) |
: getbase ( addr u -- addr' u' ) |
over c@ [char] $ - dup 4 u< |
over c@ [char] $ - dup 4 u< |
Line 427 hex
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Line 430 hex
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: #s ( +d -- 0 0 ) \ core number-sign-s |
: #s ( +d -- 0 0 ) \ core number-sign-s |
BEGIN |
BEGIN |
# 2dup d0= |
# 2dup or 0= |
UNTIL ; |
UNTIL ; |
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\ print numbers 07jun92py |
\ print numbers 07jun92py |
Line 460 hex
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Line 463 hex
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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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has-locals [IF] |
: lp@ ( -- addr ) \ gforth l-p-fetch |
: lp@ ( -- addr ) \ gforth l-p-fetch |
laddr# [ 0 , ] ; |
laddr# [ 0 , ] ; |
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[THEN] |
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Defer 'catch |
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Defer 'throw |
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' noop IS 'catch |
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' noop IS 'throw |
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: catch ( x1 .. xn xt -- y1 .. ym 0 / z1 .. zn error ) \ exception |
: catch ( x1 .. xn xt -- y1 .. ym 0 / z1 .. zn error ) \ exception |
>r sp@ r> swap >r \ don't count xt! jaw |
'catch |
fp@ >r |
sp@ >r |
lp@ >r |
[ has-floats [IF] ] |
handler @ >r |
fp@ >r |
rp@ handler ! |
[ [THEN] ] |
execute |
[ has-locals [IF] ] |
r> handler ! rdrop rdrop rdrop 0 ; |
lp@ >r |
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[ [THEN] ] |
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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 |
: throw ( y1 .. ym error/0 -- y1 .. ym / z1 .. zn error ) \ exception |
?DUP IF |
?DUP IF |
[ here 9 cells ! ] |
[ has-header [IF] here 9 cells ! [THEN] ] \ entry point for signal handler |
handler @ rp! |
handler @ dup 0= IF |
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[ has-os [IF] ] |
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2 (bye) |
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[ [ELSE] ] |
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quit |
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[ [THEN] ] |
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THEN |
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rp! |
r> handler ! |
r> handler ! |
r> lp! |
[ has-locals [IF] ] |
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r> lp! |
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[ [THEN] ] |
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[ has-floats [IF] ] |
r> fp! |
r> fp! |
r> swap >r sp! r> |
[ [THEN] ] |
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r> swap >r sp! drop r> |
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'throw |
THEN ; |
THEN ; |
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\ Bouncing is very fine, |
\ Bouncing is very fine, |
Line 487 hex
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Line 515 hex
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: bounce ( y1 .. ym error/0 -- y1 .. ym error / y1 .. ym ) \ gforth |
: bounce ( y1 .. ym error/0 -- y1 .. ym error / y1 .. ym ) \ gforth |
\ a throw without data or fp stack restauration |
\ a throw without data or fp stack restauration |
?DUP IF |
?DUP IF |
handler @ rp! |
handler @ rp! |
r> handler ! |
r> handler ! |
r> lp! |
[ has-locals [IF] ] |
rdrop |
r> lp! |
rdrop |
[ [THEN] ] |
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[ has-floats [IF] ] |
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rdrop |
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[ [THEN] ] |
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rdrop |
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'throw |
THEN ; |
THEN ; |
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\ ?stack 23feb93py |
\ ?stack 23feb93py |
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: ?stack ( ?? -- ?? ) \ gforth |
: ?stack ( ?? -- ?? ) \ gforth |
sp@ s0 @ > IF -4 throw THEN |
sp@ s0 @ u> IF -4 throw THEN |
fp@ f0 @ > IF -&45 throw THEN ; |
[ has-floats [IF] ] |
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fp@ f0 @ u> IF -&45 throw THEN |
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[ [THEN] ] |
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; |
\ ?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 |
Line 546 Defer interpreter-notfound ( c-addr coun
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Line 582 Defer interpreter-notfound ( c-addr coun
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: compiler ( c-addr u -- ) |
: compiler ( c-addr u -- ) |
2dup find-name dup |
2dup find-name dup |
if ( c-addr u nfa ) |
if ( c-addr u nt ) |
nip nip name>comp execute |
nip nip name>comp execute |
else |
else |
drop |
drop |
Line 570 Defer interpreter-notfound ( c-addr coun
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Line 606 Defer interpreter-notfound ( c-addr coun
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: ] ( -- ) \ core right-bracket |
: ] ( -- ) \ core right-bracket |
['] compiler IS parser state on ; |
['] 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 immediatly 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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: common-list ( list1 list2 -- list3 ) \ gforth-internal |
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\ 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 |
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: ?struc ( flag -- ) abort" unstructured " ; |
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: sys? ( sys -- ) dup 0= ?struc ; |
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: >mark ( -- orig ) |
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cs-push-orig 0 , ; |
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: >resolve ( addr -- ) here over - swap ! ; |
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: <resolve ( addr -- ) here - , ; |
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: 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 |
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: AHEAD ( compilation -- orig ; run-time -- ) \ tools-ext |
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POSTPONE branch >mark POSTPONE unreachable ; immediate restrict |
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: IF ( compilation -- orig ; run-time f -- ) \ core |
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POSTPONE ?branch >mark ; immediate restrict |
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: ?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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: ?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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: then-like ( orig -- addr ) |
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swap -rot dead-orig = |
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if |
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drop |
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else |
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dead-code @ |
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if |
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set-locals-size-list dead-code off |
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else \ both live |
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dup list-size adjust-locals-size |
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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 ; |
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: THEN ( compilation orig -- ; run-time -- ) \ core |
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dup orig? then-like >resolve ; immediate restrict |
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' THEN alias ENDIF ( compilation orig -- ; run-time -- ) \ gforth |
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immediate restrict |
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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 ( 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-like ( dest -- addr ) |
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over list-size adjust-locals-size |
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swap check-begin POSTPONE unreachable ; |
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: AGAIN ( compilation dest -- ; run-time -- ) \ core-ext |
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dest? again-like POSTPONE branch <resolve ; 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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|
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: >leave ( orig -- ) |
|
\ push on leave-stack |
|
leave-sp @ |
|
dup [ leave-stack 60 cells + ] Aliteral |
|
>= abort" leave-stack full" |
|
tuck ! cell+ |
|
tuck ! cell+ |
|
tuck ! cell+ |
|
leave-sp ! ; |
|
|
|
: leave> ( -- orig ) |
|
\ pop from leave-stack |
|
leave-sp @ |
|
dup leave-stack <= IF |
|
drop 0 0 0 EXIT THEN |
|
cell - dup @ swap |
|
cell - dup @ swap |
|
cell - dup @ swap |
|
leave-sp ! ; |
|
|
|
: DONE ( compilation orig -- ; run-time -- ) \ gforth |
|
\ !! the original done had ( addr -- ) |
|
drop >r drop |
|
begin |
|
leave> |
|
over r@ u>= |
|
while |
|
POSTPONE then |
|
repeat |
|
>leave rdrop ; immediate restrict |
|
|
|
: LEAVE ( compilation -- ; run-time loop-sys -- ) \ core |
|
POSTPONE ahead |
|
>leave ; immediate restrict |
|
|
|
: ?LEAVE ( compilation -- ; run-time f | f loop-sys -- ) \ gforth question-leave |
|
POSTPONE 0= POSTPONE if |
|
>leave ; immediate restrict |
|
|
|
: DO ( compilation -- do-sys ; run-time w1 w2 -- loop-sys ) \ core |
|
POSTPONE (do) |
|
POSTPONE begin drop do-dest |
|
( 0 0 0 >leave ) ; immediate restrict |
|
|
|
: ?do-like ( -- do-sys ) |
|
( 0 0 0 >leave ) |
|
>mark >leave |
|
POSTPONE begin drop do-dest ; |
|
|
|
: ?DO ( compilation -- do-sys ; run-time w1 w2 -- | loop-sys ) \ core-ext question-do |
|
POSTPONE (?do) ?do-like ; immediate restrict |
|
|
|
: +DO ( compilation -- do-sys ; run-time n1 n2 -- | loop-sys ) \ gforth plus-do |
|
POSTPONE (+do) ?do-like ; immediate restrict |
|
|
|
: U+DO ( compilation -- do-sys ; run-time u1 u2 -- | loop-sys ) \ gforth u-plus-do |
|
POSTPONE (u+do) ?do-like ; immediate restrict |
|
|
|
: -DO ( compilation -- do-sys ; run-time n1 n2 -- | loop-sys ) \ gforth minus-do |
|
POSTPONE (-do) ?do-like ; immediate restrict |
|
|
|
: U-DO ( compilation -- do-sys ; run-time u1 u2 -- | loop-sys ) \ gforth u-minus-do |
|
POSTPONE (u-do) ?do-like ; immediate restrict |
|
|
|
: FOR ( compilation -- do-sys ; run-time u -- loop-sys ) \ gforth |
|
POSTPONE (for) |
|
POSTPONE begin drop do-dest |
|
( 0 0 0 >leave ) ; immediate restrict |
|
|
|
\ LOOP etc. are just like UNTIL |
|
|
|
: loop-like ( do-sys xt1 xt2 -- ) |
|
>r >r 0 cs-pick swap cell - swap 1 cs-roll r> r> rot do-dest? |
|
until-like POSTPONE done POSTPONE unloop ; |
|
|
|
: LOOP ( compilation do-sys -- ; run-time loop-sys1 -- | loop-sys2 ) \ core |
|
['] (loop) ['] (loop)-lp+!# loop-like ; immediate restrict |
|
|
|
: +LOOP ( compilation do-sys -- ; run-time loop-sys1 n -- | loop-sys2 ) \ core plus-loop |
|
['] (+loop) ['] (+loop)-lp+!# loop-like ; immediate restrict |
|
|
|
\ !! should the compiler warn about +DO..-LOOP? |
|
: -LOOP ( compilation do-sys -- ; run-time loop-sys1 u -- | loop-sys2 ) \ gforth minus-loop |
|
['] (-loop) ['] (-loop)-lp+!# loop-like ; immediate restrict |
|
|
|
\ 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. |
|
: S+LOOP ( compilation do-sys -- ; run-time loop-sys1 n -- | loop-sys2 ) \ gforth s-plus-loop |
|
['] (s+loop) ['] (s+loop)-lp+!# loop-like ; immediate restrict |
|
|
|
: NEXT ( compilation do-sys -- ; run-time loop-sys1 -- | loop-sys2 ) \ gforth |
|
['] (next) ['] (next)-lp+!# loop-like ; immediate restrict |
|
|
|
\ Structural Conditionals 12dec92py |
|
|
|
: EXIT ( compilation -- ; run-time nest-sys -- ) \ core |
|
0 adjust-locals-size |
|
POSTPONE ;s |
|
POSTPONE unreachable ; immediate restrict |
|
|
|
: ?EXIT ( -- ) ( compilation -- ; run-time nest-sys f -- | nest-sys ) \ gforth |
|
POSTPONE if POSTPONE exit POSTPONE then ; immediate restrict |
|
|
|
\ Strings 22feb93py |
\ Strings 22feb93py |
|
|
: ," ( "string"<"> -- ) [char] " parse |
: ," ( "string"<"> -- ) [char] " parse |
Line 967 Avariable leave-sp leave-stack 3 cells
|
Line 618 Avariable leave-sp leave-stack 3 cells
|
postpone (S") here over char+ allot place align ; |
postpone (S") here over char+ allot place align ; |
immediate restrict |
immediate restrict |
: ( ( compilation 'ccc<close-paren>' -- ; run-time -- ) \ core,file paren |
: ( ( compilation 'ccc<close-paren>' -- ; run-time -- ) \ core,file paren |
BEGIN |
[char] ) parse 2drop ; immediate |
>in @ [char] ) parse nip >in @ rot - = |
|
WHILE |
|
loadfile @ IF |
|
refill 0= abort" missing ')' in paren comment" |
|
THEN |
|
REPEAT ; immediate |
|
: \ ( -- ) \ core-ext backslash |
: \ ( -- ) \ core-ext backslash |
blk @ |
blk @ |
IF |
IF |
Line 1028 defer header ( -- ) \ gforth
|
Line 674 defer header ( -- ) \ gforth
|
' (header) IS header |
' (header) IS header |
|
|
: string, ( c-addr u -- ) \ gforth |
: string, ( c-addr u -- ) \ gforth |
\ puts down string as cstring |
\G puts down string as cstring |
dup c, here swap chars dup allot move ; |
dup c, here swap chars dup allot move ; |
|
|
: header, ( c-addr u -- ) \ gforth |
: header, ( c-addr u -- ) \ gforth |
Line 1042 defer header ( -- ) \ gforth
|
Line 688 defer header ( -- ) \ gforth
|
: input-stream-header ( "name" -- ) |
: input-stream-header ( "name" -- ) |
name name-too-short? header, ; |
name name-too-short? header, ; |
: input-stream ( -- ) \ general |
: input-stream ( -- ) \ general |
\ switches back to getting the name from the input stream ; |
\G 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) |
Line 1078 create nextname-buffer 32 chars allot
|
Line 724 create nextname-buffer 32 chars allot
|
alias-mask lastflags creset |
alias-mask lastflags creset |
dup A, lastcfa ! ; |
dup A, lastcfa ! ; |
|
|
: name>string ( nfa -- addr count ) \ gforth name-to-string |
: name>string ( nt -- addr count ) \ gforth name-to-string |
cell+ count $1F and ; |
\g @var{addr count} is the name of the word represented by @var{nt}. |
|
cell+ count $1F and ; |
|
|
Create ??? 0 , 3 c, char ? c, char ? c, char ? c, |
Create ??? 0 , 3 c, char ? c, char ? c, char ? c, |
: >name ( cfa -- nfa ) \ gforth to-name |
: >name ( cfa -- nt ) \ gforth to-name |
$21 cell do |
$21 cell do |
dup i - count $9F and + cfaligned over alias-mask + = if |
dup i - count $9F and + cfaligned over alias-mask + = if |
i - cell - unloop exit |
i - cell - unloop exit |
Line 1101 Create ??? 0 , 3 c, char ? c, char ? c,
|
Line 748 Create ??? 0 , 3 c, char ? c, char ? c,
|
: !does ( addr -- ) \ gforth store-does |
: !does ( addr -- ) \ gforth store-does |
lastxt does-code! ; |
lastxt does-code! ; |
: (does>) ( R: addr -- ) |
: (does>) ( R: addr -- ) |
r> /does-handler + !does ; |
r> cfaligned /does-handler + !does ; |
: dodoes, ( -- ) |
: dodoes, ( -- ) |
here /does-handler allot does-handler! ; |
cfalign here /does-handler allot does-handler! ; |
|
|
|
doer? :dovar [IF] |
: Create ( "name" -- ) \ core |
: Create ( "name" -- ) \ core |
Header reveal dovar: cfa, ; |
Header reveal dovar: cfa, ; |
|
[ELSE] |
|
: Create ( "name" -- ) \ core |
|
Header reveal here lastcfa ! 0 A, 0 , DOES> ; |
|
[THEN] |
|
|
\ Create Variable User Constant 17mar93py |
\ Create Variable User Constant 17mar93py |
|
|
Line 1114 Create ??? 0 , 3 c, char ? c, char ? c,
|
Line 766 Create ??? 0 , 3 c, char ? c, char ? c,
|
Create 0 , ; |
Create 0 , ; |
: AVariable ( "name" -- ) \ gforth |
: AVariable ( "name" -- ) \ gforth |
Create 0 A, ; |
Create 0 A, ; |
: 2VARIABLE ( "name" -- ) \ double |
: 2Variable ( "name" -- ) \ double |
create 0 , 0 , ; |
create 0 , 0 , ; |
|
|
|
: uallot ( n -- ) udp @ swap udp +! ; |
|
|
|
doer? :douser [IF] |
: User ( "name" -- ) \ gforth |
: User ( "name" -- ) \ gforth |
Variable ; |
Header reveal douser: cfa, cell uallot , ; |
: AUser ( "name" -- ) \ gforth |
: AUser ( "name" -- ) \ gforth |
AVariable ; |
User ; |
|
[ELSE] |
: (Constant) Header reveal docon: cfa, ; |
: User Create uallot , DOES> @ up @ + ; |
|
: AUser User ; |
|
[THEN] |
|
|
|
doer? :docon [IF] |
|
: (Constant) Header reveal docon: cfa, ; |
|
[ELSE] |
|
: (Constant) Create DOES> @ ; |
|
[THEN] |
: Constant ( w "name" -- ) \ core |
: Constant ( w "name" -- ) \ core |
\ \G Defines constant @var{name} |
\G Defines constant @var{name} |
\ \G |
\G |
\ \G @var{name} execution: @var{-- w} |
\G @var{name} execution: @var{-- w} |
(Constant) , ; |
(Constant) , ; |
: AConstant ( addr "name" -- ) \ gforth |
: AConstant ( addr "name" -- ) \ gforth |
(Constant) A, ; |
(Constant) A, ; |
|
: Value ( w "name" -- ) \ core-ext |
|
(Constant) , ; |
|
|
: 2Constant ( w1 w2 "name" -- ) \ double |
: 2Constant ( w1 w2 "name" -- ) \ double |
Create ( w1 w2 "name" -- ) |
Create ( w1 w2 "name" -- ) |
Line 1137 Create ??? 0 , 3 c, char ? c, char ? c,
|
Line 802 Create ??? 0 , 3 c, char ? c, char ? c,
|
DOES> ( -- w1 w2 ) |
DOES> ( -- w1 w2 ) |
2@ ; |
2@ ; |
|
|
|
doer? :dofield [IF] |
|
: (Field) Header reveal dofield: cfa, ; |
|
[ELSE] |
|
: (Field) Create DOES> @ + ; |
|
[THEN] |
\ IS Defer What's Defers TO 24feb93py |
\ IS Defer What's Defers TO 24feb93py |
|
|
|
doer? :dodefer [IF] |
: Defer ( "name" -- ) \ gforth |
: Defer ( "name" -- ) \ gforth |
\ !! shouldn't it be initialized with abort or something similar? |
\ !! shouldn't it be initialized with abort or something similar? |
Header Reveal dodefer: cfa, |
Header Reveal dodefer: cfa, |
['] noop A, ; |
['] noop A, ; |
\ Create ( -- ) |
[ELSE] |
\ ['] noop A, |
: Defer ( "name" -- ) \ gforth |
\ DOES> ( ??? ) |
Create ['] noop A, |
\ perform ; |
DOES> @ execute ; |
|
[THEN] |
|
|
: Defers ( "name" -- ) \ gforth |
: Defers ( "name" -- ) \ gforth |
' >body @ compile, ; immediate |
' >body @ compile, ; immediate |
Line 1171 AVariable current ( -- addr ) \ gforth
|
Line 843 AVariable current ( -- addr ) \ gforth
|
|
|
: last? ( -- false / nfa nfa ) |
: last? ( -- false / nfa nfa ) |
last @ ?dup ; |
last @ ?dup ; |
: (reveal) ( nfa wid -- ) |
: (reveal) ( nt wid -- ) |
( wid>wordlist-id ) dup >r |
( wid>wordlist-id ) dup >r |
@ over ( name>link ) ! |
@ over ( name>link ) ! |
r> ! ; |
r> ! ; |
Line 1181 AVariable current ( -- addr ) \ gforth
|
Line 853 AVariable current ( -- addr ) \ gforth
|
\ word list structure: |
\ word list structure: |
|
|
struct |
struct |
1 cells: field find-method \ xt: ( c_addr u wid -- name-id ) |
1 cells: field find-method \ xt: ( c_addr u wid -- nt ) |
1 cells: field reveal-method \ xt: ( nfa wid -- ) \ used by dofield:, must be field |
1 cells: field reveal-method \ xt: ( nt wid -- ) \ used by dofield:, must be field |
1 cells: field rehash-method \ xt: ( wid -- ) |
1 cells: field rehash-method \ xt: ( wid -- ) |
\ \ !! what else |
\ \ !! what else |
end-struct wordlist-map-struct |
end-struct wordlist-map-struct |
Line 1194 struct
|
Line 866 struct
|
1 cells: field wordlist-extend \ points to wordlist extensions (eg hash) |
1 cells: field wordlist-extend \ points to wordlist extensions (eg hash) |
end-struct wordlist-struct |
end-struct wordlist-struct |
|
|
: f83find ( addr len wordlist -- nfa / false ) |
: f83find ( addr len wordlist -- nt / false ) |
( wid>wordlist-id ) @ (f83find) ; |
( wid>wordlist-id ) @ (f83find) ; |
|
|
\ Search list table: find reveal |
\ Search list table: find reveal |
Line 1231 end-struct interpret/compile-struct
|
Line 903 end-struct interpret/compile-struct
|
(cfa>int) |
(cfa>int) |
then ; |
then ; |
|
|
: name>int ( nfa -- xt ) \ gforth |
: name>int ( nt -- xt ) \ gforth |
|
\G @var{xt} represents the interpretation semantics of the word |
|
\G @var{nt}. Produces @code{' compile-only-error} if |
|
\G @var{nt} is compile-only. |
(name>x) (x>int) ; |
(name>x) (x>int) ; |
|
|
: name?int ( nfa -- xt ) \ gforth |
: name?int ( nt -- xt ) \ gforth |
\ like name>int, but throws an error if compile-only |
\G Like name>int, but throws an error if compile-only. |
(name>x) restrict-mask and |
(name>x) restrict-mask and |
if |
if |
compile-only-error \ does not return |
compile-only-error \ does not return |
then |
then |
(cfa>int) ; |
(cfa>int) ; |
|
|
: name>comp ( nfa -- w xt ) \ gforth |
: name>comp ( nt -- w xt ) \ gforth |
\ get compilation semantics of name |
\G @var{w xt} is the compilation token for the word @var{nt}. |
(name>x) >r dup interpret/compile? |
(name>x) >r dup interpret/compile? |
if |
if |
interpret/compile-comp @ |
interpret/compile-comp @ |
Line 1254 end-struct interpret/compile-struct
|
Line 929 end-struct interpret/compile-struct
|
['] compile, |
['] compile, |
then ; |
then ; |
|
|
: (search-wordlist) ( addr count wid -- nfa / false ) |
: (search-wordlist) ( addr count wid -- nt / false ) |
dup wordlist-map @ find-method perform ; |
dup wordlist-map @ find-method perform ; |
|
|
: flag-sign ( f -- 1|-1 ) |
: flag-sign ( f -- 1|-1 ) |
Line 1271 end-struct interpret/compile-struct
|
Line 946 end-struct interpret/compile-struct
|
(name>intn) |
(name>intn) |
then ; |
then ; |
|
|
: find-name ( c-addr u -- nfa/0 ) |
: find-name ( c-addr u -- nt/0 ) \ gforth |
|
\g Find the name @var{c-addr u} in the current search |
|
\g order. Return its nt, if found, otherwise 0. |
lookup @ (search-wordlist) ; |
lookup @ (search-wordlist) ; |
|
|
: sfind ( c-addr u -- 0 / xt +-1 ) \ gforth-obsolete |
: sfind ( c-addr u -- 0 / xt +-1 ) \ gforth-obsolete |
find-name dup |
find-name dup |
if ( nfa ) |
if ( nt ) |
state @ |
state @ |
if |
if |
name>comp ['] execute = flag-sign |
name>comp ['] execute = flag-sign |
Line 1285 end-struct interpret/compile-struct
|
Line 962 end-struct interpret/compile-struct
|
then |
then |
then ; |
then ; |
|
|
: find ( c-addr -- xt +-1 / c-addr 0 ) \ core |
: find ( c-addr -- xt +-1 / c-addr 0 ) \ core,search |
dup count sfind dup |
dup count sfind dup |
if |
if |
rot drop |
rot drop |
then ; |
then ; |
|
|
: (') ( "name" -- nfa ) \ gforth |
: (') ( "name" -- nt ) \ gforth |
name find-name dup 0= |
name find-name dup 0= |
IF |
IF |
drop -&13 bounce |
drop -&13 bounce |
THEN ; |
THEN ; |
|
|
: [(')] ( compilation "name" -- ; run-time -- nfa ) \ gforth bracket-paren-tick |
: [(')] ( compilation "name" -- ; run-time -- nt ) \ gforth bracket-paren-tick |
(') postpone ALiteral ; immediate restrict |
(') postpone ALiteral ; immediate restrict |
|
|
: ' ( "name" -- xt ) \ core tick |
: ' ( "name" -- xt ) \ core tick |
|
\g @var{xt} represents @var{name}'s interpretation |
|
\g semantics. Performs @code{-14 throw} if the word has no |
|
\g interpretation semantics. |
(') name?int ; |
(') name?int ; |
: ['] ( compilation "name" -- ; run-time -- xt ) \ core bracket-tick |
: ['] ( compilation. "name" -- ; run-time. -- xt ) \ core bracket-tick |
|
\g @var{xt} represents @var{name}'s interpretation |
|
\g semantics. Performs @code{-14 throw} if the word has no |
|
\g interpretation semantics. |
' postpone ALiteral ; immediate restrict |
' postpone ALiteral ; immediate restrict |
|
|
: COMP' ( "name" -- w xt ) \ gforth c-tick |
: COMP' ( "name" -- w xt ) \ gforth c-tick |
|
\g @var{w xt} represents @var{name}'s compilation semantics. |
(') name>comp ; |
(') name>comp ; |
: [COMP'] ( compilation "name" -- ; run-time -- w xt ) \ gforth bracket-comp-tick |
: [COMP'] ( compilation "name" -- ; run-time -- w xt ) \ gforth bracket-comp-tick |
|
\g @var{w xt} represents @var{name}'s compilation semantics. |
COMP' swap POSTPONE Aliteral POSTPONE ALiteral ; immediate restrict |
COMP' swap POSTPONE Aliteral POSTPONE ALiteral ; immediate restrict |
|
|
\ reveal words |
\ reveal words |
Line 1316 Variable warnings ( -- addr ) \ gforth
|
Line 1001 Variable warnings ( -- addr ) \ gforth
|
G -1 warnings T ! |
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 |
\G prints a warning if the string is already present in the wordlist |
>r 2dup 2dup r> (search-wordlist) warnings @ and ?dup if |
>r 2dup 2dup r> (search-wordlist) warnings @ and ?dup if |
." redefined " name>string 2dup type |
." redefined " name>string 2dup type |
compare 0<> if |
compare 0<> if |
Line 1333 G -1 warnings T !
|
Line 1018 G -1 warnings T !
|
if \ the last word has a header |
if \ the last word has a header |
dup ( name>link ) @ 1 and |
dup ( name>link ) @ 1 and |
if \ it is still hidden |
if \ it is still hidden |
dup ( name>link ) @ 1 xor ( nfa wid ) |
dup ( name>link ) @ 1 xor ( nt wid ) |
2dup >r name>string r> check-shadow ( nfa wid ) |
2dup >r name>string r> check-shadow ( nt wid ) |
dup wordlist-map @ reveal-method perform |
dup wordlist-map @ reveal-method perform |
then |
then |
then ; |
then ; |
Line 1366 G -1 warnings T !
|
Line 1051 G -1 warnings T !
|
dup IF |
dup IF |
#bs emit bl emit #bs emit 1- rot 1- -rot |
#bs emit bl emit #bs emit 1- rot 1- -rot |
THEN false ; |
THEN false ; |
: (ret) true space ; |
: (ret) true bl emit ; |
|
|
Create ctrlkeys |
Create ctrlkeys |
] false false false false false false false false |
] false false false false false false false false |
Line 1389 defer everychar
|
Line 1074 defer everychar
|
: accept ( addr len -- len ) \ core |
: 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 |
BEGIN key decode UNTIL |
BEGIN key decode UNTIL |
2drop nip ; |
2drop nip ; |
|
|
\ Output 13feb93py |
\ Output 13feb93py |
|
|
|
has-os [IF] |
|
0 Value outfile-id ( -- file-id ) \ gforth |
|
|
: (type) ( c-addr u -- ) \ gforth |
: (type) ( c-addr u -- ) \ gforth |
outfile-id write-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? |
outfile-id write-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? |
; |
; |
|
|
Defer type ( c-addr u -- ) \ core |
|
\ defer type for a output buffer or fast |
|
\ screen write |
|
|
|
' (type) IS Type |
|
|
|
: (emit) ( c -- ) \ gforth |
: (emit) ( c -- ) \ gforth |
outfile-id emit-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? |
outfile-id emit-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ? |
; |
; |
|
[THEN] |
|
|
|
Defer type ( c-addr u -- ) \ core |
|
' (type) IS Type |
|
|
Defer emit ( c -- ) \ core |
Defer emit ( c -- ) \ core |
' (Emit) IS Emit |
' (Emit) IS Emit |
Line 1417 Defer key ( -- c ) \ core
|
Line 1103 Defer key ( -- c ) \ core
|
|
|
\ Query 07apr93py |
\ Query 07apr93py |
|
|
|
has-files 0= [IF] |
|
: sourceline# ( -- n ) loadline @ ; |
|
[THEN] |
|
|
: refill ( -- flag ) \ core-ext,block-ext,file-ext |
: refill ( -- flag ) \ core-ext,block-ext,file-ext |
blk @ IF 1 blk +! true 0 >in ! EXIT THEN |
blk @ IF 1 blk +! true 0 >in ! EXIT THEN |
tib /line |
tib /line |
|
[ has-files [IF] ] |
loadfile @ ?dup |
loadfile @ ?dup |
IF read-line throw |
IF read-line throw |
ELSE sourceline# 0< IF 2drop false EXIT THEN |
ELSE |
accept true |
[ [THEN] ] |
|
sourceline# 0< IF 2drop false EXIT THEN |
|
accept true |
|
[ has-files [IF] ] |
THEN |
THEN |
|
[ [THEN] ] |
1 loadline +! |
1 loadline +! |
swap #tib ! 0 >in ! ; |
swap #tib ! 0 >in ! ; |
|
|
: Query ( -- ) \ core-ext |
: query ( -- ) \ core-ext |
\ obsolescent |
\G obsolescent |
loadfile off blk off refill drop ; |
blk off loadfile off |
|
tib /line accept #tib ! 0 >in ! ; |
|
|
\ File specifiers 11jun93jaw |
\ save-mem extend-mem |
|
|
|
has-os [IF] |
|
: save-mem ( addr1 u -- addr2 u ) \ gforth |
|
\g copy a memory block into a newly allocated region in the heap |
|
swap >r |
|
dup allocate throw |
|
swap 2dup r> -rot move ; |
|
|
\ 1 c, here char r c, 0 c, 0 c, 0 c, char b c, 0 c, |
: extend-mem ( addr1 u1 u -- addr addr2 u2 ) |
\ 2 c, here char r c, char + c, 0 c, |
\ extend memory block allocated from the heap by u aus |
\ 2 c, here char w c, char + c, 0 c, align |
\ the (possibly reallocated piece is addr2 u2, the extension is at addr |
4 Constant w/o ( -- fam ) \ file w-o |
over >r + dup >r resize throw |
2 Constant r/w ( -- fam ) \ file r-w |
r> over r> + -rot ; |
0 Constant r/o ( -- fam ) \ file r-o |
[THEN] |
|
|
\ BIN WRITE-LINE 11jun93jaw |
|
|
|
\ : bin dup 1 chars - c@ |
|
\ r/o 4 chars + over - dup >r swap move r> ; |
|
|
|
: bin ( fam1 -- fam2 ) \ file |
|
1 or ; |
|
|
|
create nl$ 1 c, A c, 0 c, \ gnu includes usually a cr in dos |
|
\ or not unix environments if |
|
\ bin is not selected |
|
|
|
: write-line ( c-addr u fileid -- ior ) \ file |
|
dup >r write-file |
|
?dup IF |
|
r> drop EXIT |
|
THEN |
|
nl$ count r> write-file ; |
|
|
|
\ include-file 07apr93py |
|
|
|
: push-file ( -- ) r> |
|
sourceline# >r loadfile @ >r |
|
blk @ >r tibstack @ >r >tib @ >r #tib @ >r |
|
>tib @ tibstack @ = IF r@ tibstack +! THEN |
|
tibstack @ >tib ! >in @ >r >r ; |
|
|
|
: pop-file ( throw-code -- throw-code ) |
|
dup IF |
|
source >in @ sourceline# sourcefilename |
|
error-stack dup @ dup 1+ |
|
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 ; |
|
|
|
: absolut-path? ( addr u -- flag ) \ gforth |
|
\ a path is absolute, if it starts with a / or a ~ (~ expansion), |
|
\ or if it is in the form ./* or ../*, extended regexp: [/~]|./|../ |
|
\ Pathes simply containing a / are not absolute! |
|
over c@ '/ = >r |
|
over c@ '~ = >r |
|
2dup 2 min S" ./" compare 0= >r |
|
3 min S" ../" compare 0= |
|
r> r> r> or or or ; |
|
\ [char] / scan nip 0<> ; |
|
|
|
: 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 absolut-path? |
|
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-mem 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@ 2* cells 2 cells extend-mem |
|
2/ cell / included-files 2! |
|
2! ; |
|
\ included-files 2@ tuck 1+ 2* cells resize throw |
|
\ swap 2dup 1+ included-files 2! |
|
\ 2* cells + 2! ; |
|
|
|
: 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-mem 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 ; |
|
|
|
: required ( i*x addr u -- j*x ) \ gforth |
|
\ 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 |
|
|
Line 1641 create image-included-files 1 , A, ( po
|
Line 1158 create image-included-files 1 , A, ( po
|
: clearstack ( ... -- ) |
: clearstack ( ... -- ) |
s0 @ sp! ; |
s0 @ sp! ; |
|
|
\ INCLUDE 9may93jaw |
|
|
|
: include ( "file" -- ) \ gforth |
|
name included ; |
|
|
|
: require ( "file" -- ) \ gforth |
|
name required ; |
|
|
|
\ RECURSE 17may93jaw |
\ RECURSE 17may93jaw |
|
|
: recurse ( compilation -- ; run-time ?? -- ?? ) \ core |
: recurse ( compilation -- ; run-time ?? -- ?? ) \ core |
Line 1667 create image-included-files 1 , A, ( po
|
Line 1176 create image-included-files 1 , A, ( po
|
|
|
\ EVALUATE 17may93jaw |
\ EVALUATE 17may93jaw |
|
|
|
has-files 0= [IF] |
|
: push-file ( -- ) r> |
|
sourceline# >r tibstack @ >r >tib @ >r #tib @ >r |
|
>tib @ tibstack @ = IF r@ tibstack +! THEN |
|
tibstack @ >tib ! >in @ >r >r ; |
|
|
|
: pop-file ( throw-code -- throw-code ) |
|
r> |
|
r> >in ! r> #tib ! r> >tib ! r> tibstack ! r> loadline ! >r ; |
|
[THEN] |
|
|
: evaluate ( c-addr len -- ) \ core,block |
: evaluate ( c-addr len -- ) \ core,block |
push-file #tib ! >tib ! |
push-file #tib ! >tib ! |
>in off blk off loadfile off -1 loadline ! |
>in off blk off loadfile off -1 loadline ! |
Line 1684 create image-included-files 1 , A, ( po
|
Line 1204 create image-included-files 1 , A, ( po
|
Defer 'quit |
Defer 'quit |
Defer .status |
Defer .status |
: prompt state @ IF ." compiled" EXIT THEN ." ok" ; |
: prompt state @ IF ." compiled" EXIT THEN ." ok" ; |
: (quit) BEGIN .status cr query interpret prompt AGAIN ; |
: (Query) ( -- ) |
|
loadfile off blk off refill drop ; |
|
: (quit) BEGIN .status cr (query) interpret prompt AGAIN ; |
' (quit) IS 'quit |
' (quit) IS 'quit |
|
|
\ DOERROR (DOERROR) 13jun93jaw |
\ DOERROR (DOERROR) 13jun93jaw |
Line 1709 max-errors 6 * cells allot
|
Line 1231 max-errors 6 * cells allot
|
: typewhite ( addr u -- ) \ gforth |
: typewhite ( addr u -- ) \ gforth |
\ like type, but white space is printed instead of the characters |
\ like type, but white space is printed instead of the characters |
bounds ?do |
bounds ?do |
i c@ 9 = if \ check for tab |
i c@ #tab = if \ check for tab |
9 |
#tab |
else |
else |
bl |
bl |
then |
then |
Line 1780 DEFER DOERROR
|
Line 1302 DEFER DOERROR
|
\ : .name ( name -- ) name>string 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 ; |
|
Defer 'cold ( -- ) \ gforth tick-cold |
: cstring>sstring ( cstring -- addr n ) \ gforth cstring-to-sstring |
\ hook (deferred word) for things to do right before interpreting the |
-1 0 scan 0 swap 1+ /string ; |
\ command-line arguments |
: arg ( n -- addr count ) \ gforth |
' noop IS 'cold |
cells argv @ + @ cstring>sstring ; |
|
: #! postpone \ ; immediate |
|
|
|
Create pathstring 2 cells allot \ string |
|
Create pathdirs 2 cells allot \ dir string array, pointer and count |
|
Variable argv |
|
Variable argc |
|
|
|
0 Value script? ( -- flag ) |
|
|
|
: process-path ( addr1 u1 -- addr2 u2 ) |
|
\ addr1 u1 is a path string, addr2 u2 is an array of dir strings |
|
align here >r |
|
BEGIN |
|
over >r [char] : scan |
|
over r> tuck - ( rest-str this-str ) |
|
dup |
|
IF |
|
2dup 1- chars + c@ [char] / <> |
|
IF |
|
2dup chars + [char] / swap c! |
|
1+ |
|
THEN |
|
2, |
|
ELSE |
|
2drop |
|
THEN |
|
dup |
|
WHILE |
|
1 /string |
|
REPEAT |
|
2drop |
|
here r> tuck - 2 cells / ; |
|
|
|
: do-option ( addr1 len1 addr2 len2 -- n ) |
|
2swap |
|
2dup s" -e" compare 0= >r |
|
2dup s" --evaluate" compare 0= r> or |
|
IF 2drop dup >r ['] evaluate catch |
|
?dup IF dup >r DoError r> negate (bye) THEN |
|
r> >tib +! 2 EXIT THEN |
|
." Unknown option: " type cr 2drop 1 ; |
|
|
|
: process-args ( -- ) |
|
>tib @ >r |
|
argc @ 1 |
|
?DO |
|
I arg over c@ [char] - <> |
|
IF |
|
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 |
: cold ( -- ) \ gforth |
stdout TO outfile-id |
[ has-files [IF] ] |
pathstring 2@ process-path pathdirs 2! |
pathstring 2@ process-path pathdirs 2! |
init-included-files |
init-included-files |
|
[ [THEN] ] |
'cold |
'cold |
|
[ has-files [IF] ] |
argc @ 1 > |
argc @ 1 > |
IF |
IF |
true to script? |
|
['] process-args catch ?dup |
['] process-args catch ?dup |
IF |
IF |
dup >r DoError cr r> negate (bye) |
dup >r DoError cr r> negate (bye) |
THEN |
THEN |
cr |
cr |
THEN |
THEN |
false to script? |
[ [THEN] ] |
." GForth " version-string type ." , Copyright (C) 1994-1996 Free Software Foundation, Inc." cr |
." GForth " version-string type ." , Copyright (C) 1994-1996 Free Software Foundation, Inc." cr |
." GForth comes with ABSOLUTELY NO WARRANTY; for details type `license'" cr |
." GForth comes with ABSOLUTELY NO WARRANTY; for details type `license'" |
." Type `bye' to exit" |
[ has-os [IF] ] |
|
cr ." Type `bye' to exit" |
|
[ [THEN] ] |
loadline off quit ; |
loadline off quit ; |
|
|
: license ( -- ) \ gforth |
: license ( -- ) \ gforth |
Line 1880 Defer 'cold ' noop IS 'cold
|
Line 1347 Defer 'cold ' noop IS 'cold
|
." Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA." cr ; |
." Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA." cr ; |
|
|
: boot ( path **argv argc -- ) |
: boot ( path **argv argc -- ) |
argc ! argv ! cstring>sstring pathstring 2! main-task up! |
main-task up! |
sp@ dup s0 ! $10 + dup >tib ! tibstack ! #tib off >in off |
[ has-os [IF] ] |
rp@ r0 ! fp@ f0 ! ['] cold catch DoError bye ; |
stdout TO outfile-id |
|
[ [THEN] ] |
|
[ has-files [IF] ] |
|
argc ! argv ! pathstring 2! |
|
[ [THEN] ] |
|
sp@ s0 ! |
|
[ has-locals [IF] ] |
|
lp@ forthstart 7 cells + @ - |
|
[ [ELSE] ] |
|
[ has-os [IF] ] |
|
sp@ $1040 + |
|
[ [ELSE] ] |
|
sp@ $40 + |
|
[ [THEN] ] |
|
[ [THEN] ] |
|
dup >tib ! tibstack ! #tib off >in off |
|
rp@ r0 ! |
|
[ has-floats [IF] ] |
|
fp@ f0 ! |
|
[ [THEN] ] |
|
['] cold catch DoError |
|
[ has-os [IF] ] |
|
bye |
|
[ [THEN] ] |
|
; |
|
|
|
has-os [IF] |
: bye ( -- ) \ tools-ext |
: bye ( -- ) \ tools-ext |
script? 0= IF cr THEN 0 (bye) ; |
[ has-files [IF] ] |
|
script? 0= IF cr THEN |
|
[ [ELSE] ] |
|
cr |
|
[ [THEN] ] |
|
0 (bye) ; |
|
[THEN] |
|
|
\ **argv may be scanned by the C starter to get some important |
\ **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 |