version 1.16, 1997/07/06 16:03:24
|
version 1.19, 1998/12/08 22:02:36
|
Line 1
|
Line 1
|
\ A less simple implementation of the blocks wordset. |
\ A less simple implementation of the blocks wordset. |
|
|
\ Copyright (C) 1995 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc. |
|
|
\ This file is part of Gforth. |
\ This file is part of Gforth. |
|
|
Line 32
|
Line 32
|
require struct.fs |
require struct.fs |
|
|
struct |
struct |
1 cells: field buffer-block \ the block number |
cell% field buffer-block \ the block number |
1 cells: field buffer-fid \ the block's fid |
cell% field buffer-fid \ the block's fid |
1 cells: field buffer-dirty \ the block dirty flag |
cell% field buffer-dirty \ the block dirty flag |
chars/block chars: field block-buffer \ the data |
char% chars/block * field block-buffer \ the data |
0 cells: field next-buffer |
cell% 0 * field next-buffer |
end-struct buffer-struct |
end-struct buffer-struct |
|
|
Variable block-buffers |
Variable block-buffers |
Line 46 $20 Value buffers
|
Line 46 $20 Value buffers
|
|
|
User block-fid |
User block-fid |
|
|
: block-cold |
: block-cold ( -- ) |
block-fid off last-block off |
block-fid off last-block off |
buffers buffer-struct drop * allocate throw dup block-buffers ! |
buffer-struct buffers * %alloc dup block-buffers ! ( addr ) |
buffers buffer-struct drop * erase ; |
buffer-struct %size buffers * erase ; |
|
|
' block-cold INIT8 chained |
' block-cold INIT8 chained |
|
|
Line 59 Defer flush-blocks
|
Line 59 Defer flush-blocks
|
|
|
: open-blocks ( addr u -- ) \ gforth |
: open-blocks ( addr u -- ) \ gforth |
\g use the file, whose name is given by @var{addr u}, as blocks file |
\g use the file, whose name is given by @var{addr u}, as blocks file |
2dup ['] open-fpath-file catch 0<> |
2dup open-fpath-file 0<> |
if |
if |
2drop r/w bin create-file throw |
r/w bin create-file throw |
else |
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> |
Line 114 Defer flush-blocks
|
Line 114 Defer flush-blocks
|
' flush IS flush-blocks |
' flush IS flush-blocks |
|
|
: get-buffer ( n -- a-addr ) |
: get-buffer ( n -- a-addr ) |
buffers mod buffer-struct drop * block-buffers @ + ; |
buffers mod buffer-struct %size * block-buffers @ + ; |
|
|
: block ( u -- a-addr ) |
: block ( u -- a-addr ) |
dup 0= -35 and throw |
dup 0= -35 and throw |
Line 164 User scr 0 scr !
|
Line 164 User scr 0 scr !
|
|
|
: load ( i*x n -- j*x ) |
: load ( i*x n -- j*x ) |
push-file |
push-file |
dup loadline ! blk ! >in off ( ['] ) interpret ( catch ) |
dup loadline ! blk ! >in off ['] interpret catch |
pop-file ( throw ) ; |
pop-file throw ; |
|
|
: thru ( i*x n1 n2 -- j*x ) |
: thru ( i*x n1 n2 -- j*x ) |
1+ swap ?DO I load LOOP ; |
1+ swap ?DO I load LOOP ; |