version 1.24, 1999/04/16 22:19:50
|
version 1.62, 2012/12/31 15:25:17
|
Line 1
|
Line 1
|
\ A less simple implementation of the blocks wordset. |
\ A less simple implementation of the blocks wordset. |
|
|
\ 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. |
|
|
\ This file is part of Gforth. |
\ This file is part of Gforth. |
|
|
\ 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. |
|
|
\ This program is distributed in the hope that it will be useful, |
\ This program is distributed in the hope that it will be useful, |
Line 15
|
Line 15
|
\ GNU General Public License for more details. |
\ GNU General Public License for more details. |
|
|
\ 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. |
|
|
|
|
|
\ 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
|
Line 43 Variable last-block
|
|
|
$20 Value buffers |
$20 Value buffers |
|
|
|
\ limit block files to 2GB; gforth <0.6.0 erases larger block files on |
|
\ 32-bit systems |
|
$200000 Value block-limit |
|
|
User block-fid |
User block-fid |
|
User block-offset ( -- addr ) \ gforth |
|
\G User variable containing the number of the first block (default |
|
\G since 0.5.0: 0). Block files created with Gforth versions before |
|
\G 0.5.0 have the offset 1. If you use these files you can: @code{1 |
|
\G offset !}; or add 1 to every block number used; or prepend 1024 |
|
\G characters to the file. |
|
0 block-offset ! \ store 1 here fore 0.4.0 compatibility |
|
|
|
' block-offset alias offset \ !! eliminate this? |
|
|
: 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 ; |
|
|
' block-cold INIT8 chained |
:noname ( -- ) |
|
defers 'cold |
|
block-cold |
|
; is 'cold |
|
|
block-cold |
block-cold |
|
|
Defer flush-blocks ( -- ) \ gforth |
Defer flush-blocks ( -- ) \ gforth |
|
|
: 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 |
|
else |
|
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> |
|
endtry-iferror ( c-addr u ior ) |
|
>r 2dup file-status nip 0= r> and throw \ does it really not exist? |
|
r/w bin create-file throw |
then |
then |
block-fid @ IF flush-blocks block-fid @ close-file throw THEN |
block-fid @ IF |
|
flush-blocks block-fid @ close-file throw |
|
THEN |
block-fid ! ; |
block-fid ! ; |
|
|
: 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 ; |
|
|
\ 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 86 Defer flush-blocks ( -- ) \ gforth
|
Line 104 Defer flush-blocks ( -- ) \ gforth
|
block-fid @ ; |
block-fid @ ; |
|
|
: 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}. |
1- chars/block chars um* get-block-fid reposition-file throw ; |
dup block-limit u>= -35 and throw |
|
offset @ - chars/block chars um* get-block-fid reposition-file throw ; |
|
|
: 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 ; |
|
|
: 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 |
|
r@ buffer-dirty off |
endif |
endif |
rdrop ; |
rdrop ; |
|
|
: empty-buffer ( buffer -- ) \ gforth |
: empty-buffer ( buffer -- ) \ gforth |
buffer-block off ; |
dup buffer-block on buffer-dirty off ; |
|
|
: 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 ; |
|
|
Line 127 Defer flush-blocks ( -- ) \ gforth
|
Line 147 Defer flush-blocks ( -- ) \ gforth
|
|
|
' flush IS flush-blocks |
' flush IS flush-blocks |
|
|
: get-buffer ( n -- a-addr ) \ gforth |
: get-buffer ( u -- a-addr ) \ gforth |
buffers mod buffer-struct %size * block-buffers @ + ; |
0 buffers um/mod drop buffer-struct %size * block-buffers @ + ; |
|
|
: block ( u -- a-addr ) \ block- 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 |
\G @code{update}d, transfer the contents to mass storage), read |
\G @code{update}d, transfer the contents to mass storage), read |
\G the block into the block buffer and return its start address, |
\G the block into the block buffer and return its start address, |
\G @i{a-addr}. |
\G @i{a-addr}. |
dup 0= -35 and throw |
dup offset @ u< -35 and throw |
dup get-buffer >r |
dup get-buffer >r |
dup r@ buffer-block @ <> |
dup r@ buffer-block @ <> |
r@ buffer-fid @ block-fid @ <> or |
r@ buffer-fid @ block-fid @ <> or |
Line 167 Defer flush-blocks ( -- ) \ gforth
|
Line 187 Defer flush-blocks ( -- ) \ gforth
|
\ reading in the block is unnecessary, but simpler |
\ reading in the block is unnecessary, but simpler |
block ; |
block ; |
|
|
User scr ( -- a-addr ) \ block-ext |
User scr ( -- a-addr ) \ block-ext s-c-r |
\G 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 ! |
|
|
\ 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} |
|
\G as assigned-dirty. |
buffer |
buffer |
[ 0 buffer-dirty 0 block-buffer - ] Literal + @ ; |
[ 0 buffer-dirty 0 block-buffer - ] Literal + @ ; |
|
|
Line 187 User scr ( -- a-addr ) \ block-ext
|
Line 208 User scr ( -- a-addr ) \ block-ext
|
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 ; |
|
|
|
[IFDEF] current-input |
|
:noname 2 <> -12 and throw >in ! blk ! ; |
|
\ restore-input |
|
:noname blk @ >in @ 2 ; \ save-input |
|
:noname 2 ; \ source-id "*a block*" |
|
:noname 1 blk +! 1 loadline +! >in off true ; \ refill |
|
:noname blk @ block chars/block ; \ source |
|
|
|
Create block-input A, A, A, A, A, |
|
|
|
: load ( i*x u -- j*x ) \ block |
|
\g Text-interpret block @i{u}. Block 0 cannot be @code{load}ed. |
|
dup 0= -35 and throw |
|
block-input 0 new-tib dup loadline ! blk ! s" * a block*" loadfilename 2! |
|
['] interpret catch pop-file throw ; |
|
[ELSE] |
: (source) ( -- c-addr u ) |
: (source) ( -- c-addr u ) |
blk @ ?dup |
blk @ ?dup |
IF block chars/block |
IF block chars/block |
Line 202 User scr ( -- a-addr ) \ block-ext
|
Line 239 User scr ( -- a-addr ) \ block-ext
|
\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. |
|
|
: 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 |
push-file |
push-file |
dup loadline ! blk ! >in off ['] interpret catch |
dup loadline ! blk ! >in off ['] interpret catch |
pop-file throw ; |
pop-file |
|
r>loadfilename |
|
throw ; |
|
[THEN] |
|
|
: 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 224 User scr ( -- a-addr ) \ block-ext
|
Line 264 User scr ( -- a-addr ) \ block-ext
|
\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 ; |
|
|
: --> ( -- ) \ block- block 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 unit. |
\G for chaining multiple blocks together as a single loadable |
|
\G unit. Not recommended, because it destroys the independence of |
|
\G loading. Use @code{thru} (which is standard) or @code{+thru} |
|
\G instead. |
refill drop ; immediate |
refill drop ; immediate |
|
|
: block-included ( a-addr u -- ) \ gforth |
: block-included ( a-addr u -- ) \ gforth |
Line 246 User scr ( -- a-addr ) \ block-ext
|
Line 289 User scr ( -- a-addr ) \ block-ext
|
\ 0= IF block-included ELSE included THEN ; |
\ 0= IF block-included ELSE included THEN ; |
|
|
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 |
|
|