version 1.31, 2000/09/06 20:30:06
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version 1.62, 2012/12/31 15:25:17
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\ A less simple implementation of the blocks wordset. |
\ A less simple implementation of the blocks wordset. |
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\ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1996,1997,1998,2000,2003,2006,2007,2008,2011,2012 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., 675 Mass Ave, Cambridge, MA 02139, USA. |
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\ A more efficient implementation would use mmap on OSs that |
\ A more efficient implementation would use mmap on OSs that |
Line 44 Variable last-block
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Line 43 Variable last-block
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$20 Value buffers |
$20 Value buffers |
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\ limit block files to 2GB; gforth <0.6.0 erases larger block files on |
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\ 32-bit systems |
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$200000 Value block-limit |
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User block-fid |
User block-fid |
User block-offset ( -- addr ) \ gforth |
User block-offset ( -- addr ) \ gforth |
\G User variable containing the number of the first block (default |
\G User variable containing the number of the first block (default |
Line 60 User block-offset ( -- addr ) \ gforth
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Line 63 User block-offset ( -- addr ) \ gforth
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buffer-struct buffers * %alloc dup block-buffers ! ( addr ) |
buffer-struct buffers * %alloc dup block-buffers ! ( addr ) |
buffer-struct %size buffers * erase ; |
buffer-struct %size buffers * erase ; |
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' block-cold INIT8 chained |
:noname ( -- ) |
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defers 'cold |
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block-cold |
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; is 'cold |
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block-cold |
block-cold |
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Defer flush-blocks ( -- ) \ gforth |
Defer flush-blocks ( -- ) \ gforth |
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: open-blocks ( c-addr u -- ) \ gforth |
: open-blocks ( c-addr u -- ) \ gforth |
\g Use the file, whose name is given by @i{c-addr u}, as the blocks file. |
\g Use the file, whose name is given by @i{c-addr u}, as the blocks file. |
2dup open-fpath-file 0<> |
try ( c-addr u ) |
if |
2dup open-fpath-file throw |
r/w bin create-file throw |
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else |
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rot close-file throw 2dup file-status throw bin open-file throw |
rot close-file throw 2dup file-status throw bin open-file throw |
>r 2drop r> |
>r 2drop r> |
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endtry-iferror ( c-addr u ior ) |
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>r 2dup file-status nip 0= r> and throw \ does it really not exist? |
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r/w bin create-file throw |
then |
then |
block-fid @ IF flush-blocks block-fid @ close-file throw THEN |
block-fid @ IF |
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flush-blocks block-fid @ close-file throw |
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THEN |
block-fid ! ; |
block-fid ! ; |
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: use ( "file" -- ) \ gforth |
: use ( "file" -- ) \ gforth |
\g Use @i{file} as the blocks file. |
\g Use @i{file} as the blocks file. |
name open-blocks ; |
name name-too-short? open-blocks ; |
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\ the file is opened as binary file, since it either will contain text |
\ the file is opened as binary file, since it either will contain text |
\ without newlines or binary data |
\ without newlines or binary data |
Line 95 Defer flush-blocks ( -- ) \ gforth
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Line 104 Defer flush-blocks ( -- ) \ gforth
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block-fid @ ; |
block-fid @ ; |
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: block-position ( u -- ) \ block |
: block-position ( u -- ) \ block |
\G Position the block file to the start of block @i{u}. |
\G Position the block file to the start of block @i{u}. |
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dup block-limit u>= -35 and throw |
offset @ - chars/block chars um* get-block-fid reposition-file throw ; |
offset @ - chars/block chars um* get-block-fid reposition-file throw ; |
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: update ( -- ) \ block |
: update ( -- ) \ block |
Line 104 Defer flush-blocks ( -- ) \ gforth
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Line 114 Defer flush-blocks ( -- ) \ gforth
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: save-buffer ( buffer -- ) \ gforth |
: save-buffer ( buffer -- ) \ gforth |
>r |
>r |
r@ buffer-dirty @ r@ buffer-block @ 0<> and |
r@ buffer-dirty @ |
if |
if |
r@ buffer-block @ block-position |
r@ buffer-block @ block-position |
r@ block-buffer chars/block r@ buffer-fid @ write-file throw |
r@ block-buffer chars/block r@ buffer-fid @ write-file throw |
r@ buffer-dirty off |
r@ buffer-fid @ flush-file throw |
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r@ buffer-dirty off |
endif |
endif |
rdrop ; |
rdrop ; |
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: empty-buffer ( buffer -- ) \ gforth |
: empty-buffer ( buffer -- ) \ gforth |
buffer-block off ; |
dup buffer-block on buffer-dirty off ; |
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: save-buffers ( -- ) \ block |
: save-buffers ( -- ) \ block |
\G Transfer the contents of each @code{update}d block buffer to |
\G Transfer the contents of each @code{update}d block buffer to |
Line 139 Defer flush-blocks ( -- ) \ gforth
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Line 150 Defer flush-blocks ( -- ) \ gforth
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: get-buffer ( u -- a-addr ) \ gforth |
: get-buffer ( u -- a-addr ) \ gforth |
0 buffers um/mod drop buffer-struct %size * block-buffers @ + ; |
0 buffers um/mod drop buffer-struct %size * block-buffers @ + ; |
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: block ( u -- a-addr ) \ gforthman- block |
: block ( u -- a-addr ) \ block |
\G If a block buffer is assigned for block @i{u}, return its |
\G If a block buffer is assigned for block @i{u}, return its |
\G start address, @i{a-addr}. Otherwise, assign a block buffer |
\G start address, @i{a-addr}. Otherwise, assign a block buffer |
\G for block @i{u} (if the assigned block buffer has been |
\G for block @i{u} (if the assigned block buffer has been |
Line 177 Defer flush-blocks ( -- ) \ gforth
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Line 188 Defer flush-blocks ( -- ) \ gforth
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block ; |
block ; |
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User scr ( -- a-addr ) \ block-ext s-c-r |
User scr ( -- a-addr ) \ block-ext s-c-r |
\G @code{User} variable -- @i{a-addr} is the address of a cell containing |
\G @code{User} variable containing |
\G the block number of the block most recently processed by |
\G the block number of the block most recently processed by |
\G @code{list}. |
\G @code{list}. |
0 scr ! |
0 scr ! |
Line 197 User scr ( -- a-addr ) \ block-ext s-c-r
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Line 208 User scr ( -- a-addr ) \ block-ext s-c-r
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dup scr ! |
dup scr ! |
." Screen " u. |
." Screen " u. |
scr @ updated? 0= IF ." not " THEN ." modified " cr |
scr @ updated? 0= IF ." not " THEN ." modified " cr |
16 0 |
l/s 0 |
?do |
?do |
i 2 .r space scr @ block i 64 * chars + 64 type cr |
i 2 .r space scr @ block i c/l * chars + c/l type cr |
loop ; |
loop ; |
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[IFDEF] current-input |
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:noname 2 <> -12 and throw >in ! blk ! ; |
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\ restore-input |
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:noname blk @ >in @ 2 ; \ save-input |
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:noname 2 ; \ source-id "*a block*" |
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:noname 1 blk +! 1 loadline +! >in off true ; \ refill |
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:noname blk @ block chars/block ; \ source |
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Create block-input A, A, A, A, A, |
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: load ( i*x u -- j*x ) \ block |
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\g Text-interpret block @i{u}. Block 0 cannot be @code{load}ed. |
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dup 0= -35 and throw |
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block-input 0 new-tib dup loadline ! blk ! s" * a block*" loadfilename 2! |
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['] interpret catch pop-file throw ; |
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[ELSE] |
: (source) ( -- c-addr u ) |
: (source) ( -- c-addr u ) |
blk @ ?dup |
blk @ ?dup |
IF block chars/block |
IF block chars/block |
Line 212 User scr ( -- a-addr ) \ block-ext s-c-r
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Line 239 User scr ( -- a-addr ) \ block-ext s-c-r
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\G @i{c-addr} is the address of the input buffer and @i{u} is the |
\G @i{c-addr} is the address of the input buffer and @i{u} is the |
\G number of characters in it. |
\G number of characters in it. |
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: load ( i*x n -- j*x ) \ block |
: load ( i*x u -- j*x ) \ block |
\G Save the current input source specification. Store @i{n} in |
\g Text-interpret block @i{u}. Block 0 cannot be @code{load}ed. |
\G @code{BLK}, set @code{>IN} to 0 and interpret. When the parse |
dup 0= -35 and throw |
\G area is exhausted, restore the input source specification. |
s" * a block*" loadfilename>r |
loadfilename# @ >r |
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2 loadfilename# ! \ "\a block/" |
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push-file |
push-file |
dup loadline ! blk ! >in off ['] interpret catch |
dup loadline ! blk ! >in off ['] interpret catch |
pop-file |
pop-file |
r> loadfilename# ! |
r>loadfilename |
throw ; |
throw ; |
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[THEN] |
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: thru ( i*x n1 n2 -- j*x ) \ block-ext |
: thru ( i*x n1 n2 -- j*x ) \ block-ext |
\G @code{load} the blocks @i{n1} through @i{n2} in sequence. |
\G @code{load} the blocks @i{n1} through @i{n2} in sequence. |
Line 263 User scr ( -- a-addr ) \ block-ext s-c-r
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Line 289 User scr ( -- a-addr ) \ block-ext s-c-r
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\ 0= IF block-included ELSE included THEN ; |
\ 0= IF block-included ELSE included THEN ; |
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get-current environment-wordlist set-current |
get-current environment-wordlist set-current |
true constant block |
true constant block \ environment- environment |
true constant block-ext |
true constant block-ext |
set-current |
set-current |
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