version 1.31, 2000/09/06 20:30:06
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version 1.37, 2003/01/19 23:35:29
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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) 1995-2003 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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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, write to the Free Software |
\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, 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 44 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 67 block-cold
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Line 71 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> |
then |
recover ( c-addr u ior ) |
block-fid @ IF flush-blocks block-fid @ close-file throw THEN |
>r 2dup file-status nip 0= r> and throw \ does it really not exist? |
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r/w bin create-file throw |
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endtry |
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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 |
Line 95 Defer flush-blocks ( -- ) \ gforth
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Line 102 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 108 Defer flush-blocks ( -- ) \ gforth
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Line 116 Defer flush-blocks ( -- ) \ gforth
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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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Line 202 User scr ( -- a-addr ) \ block-ext s-c-r
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Line 211 User scr ( -- a-addr ) \ block-ext s-c-r
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i 2 .r space scr @ block i 64 * chars + 64 type cr |
i 2 .r space scr @ block i 64 * chars + 64 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 +! 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 n -- j*x ) \ block |
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\G Save the current input source specification. Store @i{n} in |
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\G @code{BLK}, set @code{>IN} to 0 and interpret. When the parse |
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\G area is exhausted, restore the input source specification. |
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block-input 0 new-tib dup loadline ! blk ! 2 loadfilename# ! |
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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 217 User scr ( -- a-addr ) \ block-ext s-c-r
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Line 243 User scr ( -- a-addr ) \ block-ext s-c-r
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\G @code{BLK}, set @code{>IN} to 0 and interpret. When the parse |
\G @code{BLK}, set @code{>IN} to 0 and interpret. When the parse |
\G area is exhausted, restore the input source specification. |
\G area is exhausted, restore the input source specification. |
loadfilename# @ >r |
loadfilename# @ >r |
2 loadfilename# ! \ "\a block/" |
2 loadfilename# ! \ "*a block*" |
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. |