Diff for /gforth/blocks.fs between versions 1.27 and 1.32

version 1.27, 1999/11/08 22:01:07 version 1.32, 2000/09/23 15:05:58
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 Free Software Foundation, Inc.
   
 \ This file is part of Gforth.  \ This file is part of Gforth.
   
Line 45  Variable last-block Line 45  Variable last-block
 $20 Value buffers  $20 Value buffers
   
 User block-fid  User block-fid
 User offset   0 offset !  \ store 1 here fore 0.4.0 compatibility  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
Line 91  Defer flush-blocks ( -- ) \ gforth Line 99  Defer flush-blocks ( -- ) \ gforth
     offset @ - chars/block chars um* get-block-fid reposition-file 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
Line 109  Defer flush-blocks ( -- ) \ gforth Line 117  Defer flush-blocks ( -- ) \ gforth
   
 : 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 131  Defer flush-blocks ( -- ) \ gforth Line 139  Defer flush-blocks ( -- ) \ gforth
 : 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 ) \ 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 Line 176  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 @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 Line 184  User scr ( -- a-addr ) \ block-ext
   
 \ 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 207  User scr ( -- a-addr ) \ block-ext Line 216  User scr ( -- a-addr ) \ block-ext
     \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.
       loadfilename# @ >r
       2 loadfilename# ! \ "\a block/"
     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 ;
   
 : 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 Line 238  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 ;
   
 : --> ( -- ) \ 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

Removed from v.1.27  
changed lines
  Added in v.1.32


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