version 1.27, 1999/11/08 22:01:07
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version 1.47, 2007/02/18 18:30:51
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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 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 offset 0 offset ! \ store 1 here fore 0.4.0 compatibility |
User block-offset ( -- addr ) \ gforth |
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\G User variable containing the number of the first block (default |
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\G since 0.5.0: 0). Block files created with Gforth versions before |
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\G 0.5.0 have the offset 1. If you use these files you can: @code{1 |
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\G offset !}; or add 1 to every block number used; or prepend 1024 |
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\G characters to the file. |
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0 block-offset ! \ store 1 here fore 0.4.0 compatibility |
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' block-offset alias offset \ !! eliminate this? |
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: block-cold ( -- ) |
: block-cold ( -- ) |
block-fid off last-block off |
block-fid off last-block off |
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> |
then |
iferror ( 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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then 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 87 Defer flush-blocks ( -- ) \ gforth
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Line 105 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 |
\G Mark the current block buffer as dirty. |
\G Mark the state of the current block buffer as assigned-dirty. |
last-block @ ?dup IF buffer-dirty on THEN ; |
last-block @ ?dup IF buffer-dirty on THEN ; |
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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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Line 109 Defer flush-blocks ( -- ) \ gforth
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Line 129 Defer flush-blocks ( -- ) \ gforth
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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 |
\G mass storage, then mark all block buffers as unassigned. |
\G mass storage, then mark all block buffers as assigned-clean. |
block-buffers @ |
block-buffers @ |
buffers 0 ?DO dup save-buffer next-buffer LOOP drop ; |
buffers 0 ?DO dup save-buffer next-buffer LOOP drop ; |
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Line 131 Defer flush-blocks ( -- ) \ gforth
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Line 151 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 ) \ block- block |
: block ( u -- a-addr ) \ gforthman- 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 168 Defer flush-blocks ( -- ) \ gforth
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Line 188 Defer flush-blocks ( -- ) \ gforth
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\ reading in the block is unnecessary, but simpler |
\ reading in the block is unnecessary, but simpler |
block ; |
block ; |
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User scr ( -- a-addr ) \ block-ext |
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 -- @i{a-addr} is the address of a cell 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}. |
Line 176 User scr ( -- a-addr ) \ block-ext
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Line 196 User scr ( -- a-addr ) \ block-ext
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\ nac31Mar1999 moved "scr @" to list to make the stack comment correct |
\ nac31Mar1999 moved "scr @" to list to make the stack comment correct |
: updated? ( n -- f ) \ gforth |
: updated? ( n -- f ) \ gforth |
\G Return true if block @i{n} has been marked as dirty. |
\G Return true if @code{updated} has been used to mark block @i{n} |
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\G as assigned-dirty. |
buffer |
buffer |
[ 0 buffer-dirty 0 block-buffer - ] Literal + @ ; |
[ 0 buffer-dirty 0 block-buffer - ] Literal + @ ; |
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Line 193 User scr ( -- a-addr ) \ block-ext
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Line 214 User scr ( -- a-addr ) \ block-ext
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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 +! >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 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 ! 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 207 User scr ( -- a-addr ) \ block-ext
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Line 245 User scr ( -- a-addr ) \ block-ext
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\G Save the current input source specification. Store @i{n} in |
\G Save the current input source specification. Store @i{n} in |
\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. |
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s" * a block*" loadfilename>r |
push-file |
push-file |
dup loadline ! blk ! >in off ['] interpret catch |
dup loadline ! blk ! >in off ['] interpret catch |
pop-file throw ; |
pop-file |
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r>loadfilename |
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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 225 User scr ( -- a-addr ) \ block-ext
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Line 267 User scr ( -- a-addr ) \ block-ext
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\G current block + @i{n1} thru the current block + @i{n2}. |
\G current block + @i{n1} thru the current block + @i{n2}. |
1+ swap ?DO I +load LOOP ; |
1+ swap ?DO I +load LOOP ; |
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: --> ( -- ) \ gforth- gforth chain |
: --> ( -- ) \ gforthman- gforth chain |
\G If this symbol is encountered whilst loading block @i{n}, |
\G If this symbol is encountered whilst loading block @i{n}, |
\G discard the remainder of the block and load block @i{n+1}. Used |
\G discard the remainder of the block and load block @i{n+1}. Used |
\G for chaining multiple blocks together as a single loadable |
\G for chaining multiple blocks together as a single loadable |