| \ A less simple implementation of the blocks wordset. |
\ A less simple implementation of the blocks wordset. |
| |
|
| \ Copyright (C) 1995,1996,1997,1998,2000,2003 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1996,1997,1998,2000,2003,2006,2007,2008 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, |
| \ 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., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
|
| |
|
| |
|
| \ A more efficient implementation would use mmap on OSs that |
\ A more efficient implementation would use mmap on OSs that |
| 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 |
| |
|
| 2dup open-fpath-file throw |
2dup open-fpath-file throw |
| 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> |
| recover ( c-addr u ior ) |
endtry-iferror ( c-addr u ior ) |
| >r 2dup file-status nip 0= r> and throw \ does it really not exist? |
>r 2dup file-status nip 0= r> and throw \ does it really not exist? |
| r/w bin create-file throw |
r/w bin create-file throw |
| endtry |
then |
| block-fid @ IF |
block-fid @ IF |
| flush-blocks block-fid @ close-file throw |
flush-blocks block-fid @ close-file throw |
| THEN |
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 |
| 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 |
| : 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 @ + ; |
| |
|
| : 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 |
| \ restore-input |
\ restore-input |
| :noname blk @ >in @ 2 ; \ save-input |
:noname blk @ >in @ 2 ; \ save-input |
| :noname 2 ; \ source-id "*a block*" |
:noname 2 ; \ source-id "*a block*" |
| :noname 1 blk +! 1 loadline +! true ; \ refill |
:noname 1 blk +! 1 loadline +! >in off true ; \ refill |
| :noname blk @ block chars/block ; \ source |
:noname blk @ block chars/block ; \ source |
| |
|
| Create block-input A, A, A, A, A, |
Create block-input A, A, A, A, A, |
| |
|
| : 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. |
|
| block-input 0 new-tib dup loadline ! blk ! s" * a block*" loadfilename 2! |
block-input 0 new-tib dup loadline ! blk ! s" * a block*" loadfilename 2! |
| ['] interpret catch pop-file throw ; |
['] interpret catch pop-file throw ; |
| [ELSE] |
[ELSE] |
| \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 |
s" * a block*" loadfilename>r |
| push-file |
push-file |
| dup loadline ! blk ! >in off ['] interpret catch |
dup loadline ! blk ! >in off ['] interpret catch |
| \ 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 |
| |
|
