Diff for /gforth/blocks.fs between versions 1.6 and 1.11

version 1.6, 1995/09/06 21:00:10 version 1.11, 1996/10/02 09:48:56
Line 1 Line 1
 \ A less simple implementation of the blocks wordset.   \ A less simple implementation of the blocks wordset. 
   
 \ An more efficient implementation would use mmap on OSs that  \ Copyright (C) 1995 Free Software Foundation, Inc.
   
   \ This file is part of Gforth.
   
   \ Gforth is free software; you can redistribute it and/or
   \ modify it under the terms of the GNU General Public License
   \ as published by the Free Software Foundation; either version 2
   \ of the License, or (at your option) any later version.
   
   \ This program is distributed in the hope that it will be useful,
   \ but WITHOUT ANY WARRANTY; without even the implied warranty of
   \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   \ GNU General Public License for more details.
   
   \ You should have received a copy of the GNU General Public License
   \ along with this program; if not, write to the Free Software
   \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   
   
   \ A more efficient implementation would use mmap on OSs that
 \ provide it and many buffers on OSs that do not provide mmap.  \ provide it and many buffers on OSs that do not provide mmap.
   
 \ Now, the replacement algorithm is "direct mapped"; change to LRU  \ Now, the replacement algorithm is "direct mapped"; change to LRU
Line 38  block-cold Line 57  block-cold
   
 Defer flush-file  Defer flush-file
   
 : use-file ( addr u -- )  : open-blocks ( addr u -- ) \ gforth
     2dup r/w bin open-file 0<>      \g use the file, whose name is given by @var{addr u}, as blocks file 
       2dup ['] open-path-file catch 0<>
     if      if
         drop r/w bin create-file throw          2drop r/w bin create-file throw
     else      else
         nip nip          rot close-file throw  2dup file-status throw bin open-file throw
           >r 2drop r>
     then      then
     block-fid @ IF  flush-file block-fid @ close-file throw  THEN      block-fid @ IF  flush-file block-fid @ close-file throw  THEN
     block-fid ! ;      block-fid ! ;
   
   : use ( "file" -- ) \ gforth
       \g use @var{file} as blocks file
       name 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
 : get-block-fid ( -- fid )  : get-block-fid ( -- fid )
     block-fid @ 0=      block-fid @ 0=
     if      if
         s" blocks.fb" use-file          s" blocks.fb" open-blocks
     then      then
     block-fid @ ;      block-fid @ ;
   
Line 95  Defer flush-file Line 120  Defer flush-file
     dup 0= -35 and throw      dup 0= -35 and throw
     dup get-buffer >r      dup get-buffer >r
     dup r@ buffer-block @ <>      dup r@ buffer-block @ <>
     r@ buffer-fid @ block-fid @ <> and      r@ buffer-fid @ block-fid @ <> or
     if      if
         r@ save-buffer          r@ save-buffer
         dup block-position          dup block-position
Line 153  User scr 0 scr ! Line 178  User scr 0 scr !
 : --> ( -- )  refill drop ; immediate  : --> ( -- )  refill drop ; immediate
   
 : block-included ( addr u -- )  : block-included ( addr u -- )
     block-fid @ >r block-fid off use-file      block-fid @ >r block-fid off open-blocks
     1 load block-fid @ close-file throw flush      1 load block-fid @ close-file throw flush
     r> block-fid ! ;      r> block-fid ! ;
   

Removed from v.1.6  
changed lines
  Added in v.1.11


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