version 1.50, 2003/01/19 23:35:29
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version 1.63, 2011/12/31 15:29:25
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\ A powerful locals implementation |
\ A powerful locals implementation |
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\ Copyright (C) 1995-2003 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2007,2011 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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\ Gforth is free software; you can redistribute it and/or |
\ Gforth is free software; you can redistribute it and/or |
\ modify it under the terms of the GNU General Public License |
\ modify it under the terms of the GNU General Public License |
\ as published by the Free Software Foundation; either version 2 |
\ as published by the Free Software Foundation, either version 3 |
\ of the License, or (at your option) any later version. |
\ 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, |
\ This program is distributed in the hope that it will be useful, |
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\ GNU General Public License for more details. |
\ GNU General Public License for more details. |
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\ You should have received a copy of the GNU General Public License |
\ You should have received a copy of the GNU General Public License |
\ along with this program; if not, write to the Free Software |
\ along with this program. If not, see http://www.gnu.org/licenses/. |
\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
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\ More documentation can be found in the manual and in |
\ More documentation can be found in the manual and in |
Line 89 require search.fs
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Line 88 require search.fs
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require float.fs |
require float.fs |
require extend.fs \ for case |
require extend.fs \ for case |
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: save-mem-dict ( addr1 u -- addr2 u ) |
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here swap dup allot ( addr1 addr2 u ) |
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2dup 2>r move 2r> ; |
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: compile-@local ( n -- ) \ gforth compile-fetch-local |
: compile-@local ( n -- ) \ gforth compile-fetch-local |
case |
case |
0 of postpone @local0 endof |
0 of postpone @local0 endof |
Line 133 vocabulary locals \ this contains the lo
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Line 136 vocabulary locals \ this contains the lo
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' locals >body wordlist-id ' locals-list >body ! |
' locals >body wordlist-id ' locals-list >body ! |
slowvoc ! |
slowvoc ! |
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create locals-buffer 1000 allot \ !! limited and unsafe |
variable locals-mem-list \ linked list of all locals name memory in |
\ here the names of the local variables are stored |
0 locals-mem-list ! \ the current (outer-level) definition |
\ we would have problems storing them at the normal dp |
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variable locals-dp \ so here's the special dp for locals. |
: free-list ( addr -- ) |
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\ free all members of a linked list (link field is first) |
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begin |
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dup while |
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dup @ swap free throw |
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repeat |
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drop ; |
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: prepend-list ( addr1 addr2 -- ) |
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\ addr1 is the address of a list element, addr2 is the address of |
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\ the cell containing the address of the first list element |
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2dup @ swap ! \ store link to next element |
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! ; \ store pointer to new first element |
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: alignlp-w ( n1 -- n2 ) |
: alignlp-w ( n1 -- n2 ) |
\ cell-align size and generate the corresponding code for aligning lp |
\ cell-align size and generate the corresponding code for aligning lp |
Line 222 variable locals-dp \ so here's the speci
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Line 236 variable locals-dp \ so here's the speci
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locals-size @ swap ! |
locals-size @ swap ! |
postpone lp@ postpone c! ; |
postpone lp@ postpone c! ; |
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7 cells 32 + constant locals-name-size \ 32-char name + fields + wiggle room |
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: create-local1 ( "name" -- a-addr ) |
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create |
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immediate restrict |
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here 0 , ( place for the offset ) ; |
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variable dict-execute-dp \ the special dp for DICT-EXECUTE |
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0 value dict-execute-ude \ USABLE-DICTIONARY-END during DICT-EXECUTE |
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: dict-execute1 ( ... addr1 addr2 xt -- ... ) |
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\ execute xt with HERE set to addr1 and USABLE-DICTIONARY-END set to addr2 |
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dict-execute-dp @ dp 2>r |
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dict-execute-ude ['] usable-dictionary-end defer@ 2>r |
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swap to dict-execute-ude |
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['] dict-execute-ude is usable-dictionary-end |
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swap to dict-execute-dp |
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dict-execute-dp dpp ! |
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catch |
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2r> is usable-dictionary-end to dict-execute-ude |
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2r> dpp ! dict-execute-dp ! |
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throw ; |
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defer dict-execute ( ... addr1 addr2 xt -- ... ) |
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:noname ( ... addr1 addr2 xt -- ... ) |
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\ first have a dummy routine, for SOME-CLOCAL etc. below |
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nip nip execute ; |
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is dict-execute |
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: create-local ( " name" -- a-addr ) |
: create-local ( " name" -- a-addr ) |
\ defines the local "name"; the offset of the local shall be |
\ defines the local "name"; the offset of the local shall be |
\ stored in a-addr |
\ stored in a-addr |
create |
locals-name-size allocate throw |
immediate restrict |
dup locals-mem-list prepend-list |
here 0 , ( place for the offset ) ; |
locals-name-size cell /string over + ['] create-local1 dict-execute ; |
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variable locals-dp \ so here's the special dp for locals. |
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: lp-offset ( n1 -- n2 ) |
: lp-offset ( n1 -- n2 ) |
\ converts the offset from the frame start to an offset from lp and |
\ converts the offset from the frame start to an offset from lp and |
Line 310 immediate
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Line 357 immediate
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immediate |
immediate |
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forth definitions |
forth definitions |
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also locals-types |
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\ these "locals" are used for comparison in TO |
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c: some-clocal 2drop |
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d: some-dlocal 2drop |
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f: some-flocal 2drop |
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w: some-wlocal 2drop |
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' dict-execute1 is dict-execute \ now the real thing |
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\ the following gymnastics are for declaring locals without type specifier. |
\ the following gymnastics are for declaring locals without type specifier. |
\ we exploit a feature of our dictionary: every wordlist |
\ we exploit a feature of our dictionary: every wordlist |
\ has it's own methods for finding words etc. |
\ has it's own methods for finding words etc. |
\ So we create a vocabulary new-locals, that creates a 'w:' local named x |
\ So we create a vocabulary new-locals, that creates a 'w:' local named x |
\ when it is asked if it contains x. |
\ when it is asked if it contains x. |
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also locals-types |
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: new-locals-find ( caddr u w -- nfa ) |
: new-locals-find ( caddr u w -- nfa ) |
\ this is the find method of the new-locals vocabulary |
\ this is the find method of the new-locals vocabulary |
\ make a new local with name caddr u; w is ignored |
\ make a new local with name caddr u; w is ignored |
Line 346 new-locals-map mappedwordlist Constant n
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Line 400 new-locals-map mappedwordlist Constant n
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\ slowvoc ! |
\ slowvoc ! |
\ new-locals-map ' new-locals >body wordlist-map A! \ !! use special access words |
\ new-locals-map ' new-locals >body wordlist-map A! \ !! use special access words |
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variable old-dpp |
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\ and now, finally, the user interface words |
\ and now, finally, the user interface words |
: { ( -- lastxt wid 0 ) \ gforth open-brace |
: { ( -- latestxt wid 0 ) \ gforth open-brace |
dp old-dpp ! |
latestxt get-current |
locals-dp dpp ! |
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lastxt get-current |
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get-order new-locals-wl swap 1+ set-order |
get-order new-locals-wl swap 1+ set-order |
also locals definitions locals-types |
also locals definitions locals-types |
0 TO locals-wordlist |
0 TO locals-wordlist |
Line 360 variable old-dpp
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Line 410 variable old-dpp
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locals-types definitions |
locals-types definitions |
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: } ( lastxt wid 0 a-addr1 xt1 ... -- ) \ gforth close-brace |
: } ( latestxt wid 0 a-addr1 xt1 ... -- ) \ gforth close-brace |
\ ends locals definitions |
\ ends locals definitions |
] old-dpp @ dpp ! |
] |
begin |
begin |
dup |
dup |
while |
while |
Line 489 forth definitions
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Line 539 forth definitions
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: locals-:-hook ( sys -- sys addr xt n ) |
: locals-:-hook ( sys -- sys addr xt n ) |
\ addr is the nfa of the defined word, xt its xt |
\ addr is the nfa of the defined word, xt its xt |
DEFERS :-hook |
DEFERS :-hook |
last @ lastcfa @ |
latest latestxt |
clear-leave-stack |
clear-leave-stack |
0 locals-size ! |
0 locals-size ! |
locals-buffer locals-dp ! |
locals-mem-list @ free-list |
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0 locals-mem-list ! |
0 locals-list ! |
0 locals-list ! |
dead-code off |
dead-code off |
defstart ; |
defstart ; |
Line 632 forth definitions
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Line 683 forth definitions
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2drop |
2drop |
endif ; |
endif ; |
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: >definer ( xt -- definer ) |
: >definer ( xt -- definer ) \ gforth |
\G @var{Definer} is a unique identifier for the way the @var{xt} |
\G @var{Definer} is a unique identifier for the way the @var{xt} |
\G was defined. Words defined with different @code{does>}-codes |
\G was defined. Words defined with different @code{does>}-codes |
\G have different definers. The definer can be used for |
\G have different definers. The definer can be used for |
Line 644 forth definitions
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Line 695 forth definitions
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>code-address |
>code-address |
then ; |
then ; |
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: definer! ( definer xt -- ) |
: definer! ( definer xt -- ) \ gforth |
\G The word represented by @var{xt} changes its behaviour to the |
\G The word represented by @var{xt} changes its behaviour to the |
\G behaviour associated with @var{definer}. |
\G behaviour associated with @var{definer}. |
over 1 and if |
over 1 and if |
Line 661 forth definitions
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Line 712 forth definitions
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-&32 throw |
-&32 throw |
endif ; |
endif ; |
:noname |
:noname |
0 0 0. 0.0e0 { c: clocal w: wlocal d: dlocal f: flocal } |
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comp' drop dup >definer |
comp' drop dup >definer |
case |
case |
[ ' locals-wordlist ] literal >definer \ value |
[ ' locals-wordlist ] literal >definer \ value |
Line 669 forth definitions
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Line 719 forth definitions
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\ !! dependent on c: etc. being does>-defining words |
\ !! dependent on c: etc. being does>-defining words |
\ this works, because >definer uses >does-code in this case, |
\ this works, because >definer uses >does-code in this case, |
\ which produces a relocatable address |
\ which produces a relocatable address |
[ comp' clocal drop >definer ] literal |
[ comp' some-clocal drop ] literal >definer |
OF POSTPONE laddr# >body @ lp-offset, POSTPONE c! ENDOF |
OF POSTPONE laddr# >body @ lp-offset, POSTPONE c! ENDOF |
[ comp' wlocal drop >definer ] literal |
[ comp' some-wlocal drop ] literal >definer |
OF POSTPONE laddr# >body @ lp-offset, POSTPONE ! ENDOF |
OF POSTPONE laddr# >body @ lp-offset, POSTPONE ! ENDOF |
[ comp' dlocal drop >definer ] literal |
[ comp' some-dlocal drop ] literal >definer |
OF POSTPONE laddr# >body @ lp-offset, POSTPONE 2! ENDOF |
OF POSTPONE laddr# >body @ lp-offset, POSTPONE 2! ENDOF |
[ comp' flocal drop >definer ] literal |
[ comp' some-flocal drop ] literal >definer |
OF POSTPONE laddr# >body @ lp-offset, POSTPONE f! ENDOF |
OF POSTPONE laddr# >body @ lp-offset, POSTPONE f! ENDOF |
-&32 throw |
-&32 throw |
endcase ; |
endcase ; |
interpret/compile: TO ( c|w|d|r "name" -- ) \ core-ext,local |
interpret/compile: TO ( c|w|d|r "name" -- ) \ core-ext,local |
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: locals| |
: locals| ( ... "name ..." -- ) \ local-ext locals-bar |
\ don't use 'locals|'! use '{'! A portable and free '{' |
\ don't use 'locals|'! use '{'! A portable and free '{' |
\ implementation is compat/anslocals.fs |
\ implementation is compat/anslocals.fs |
BEGIN |
BEGIN |