Diff for /gforth/struct.fs between versions 1.1 and 1.9

version 1.1, 1994/02/11 16:30:47 version 1.9, 1997/02/09 21:51:41
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 \ $Id$  \ data structures (like C structs)
   
   \ 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.
   
   
 \ Usage example:  \ Usage example:
 \  \
Line 12 Line 31
 \     1 cells: field enum-method  \     1 cells: field enum-method
 \ end-struct ext-wordlist-map \ with the fields search-method,...,enum-method  \ end-struct ext-wordlist-map \ with the fields search-method,...,enum-method
   
 \ 2, 2constant and nalign should be somewhere else  
 : 2, ( w1 w2 -- )  
  here 2 cells allot 2! ;  
   
 : 2constant ( w1 w2 -- )  
     create 2,  
     does>  ( -- w1 w2 )  
         2@ ;  
   
 : nalign ( addr1 n -- addr2 )  : nalign ( addr1 n -- addr2 )
 \ addr2 is the aligned version of addr1 wrt the alignment size n  \ addr2 is the aligned version of addr1 wrt the alignment size n
  1- tuck +  swap invert and ;   1- tuck +  swap invert and ;
   
 : create-field ( offset1 align1 size align -- offset2 align2 )  : field ( offset1 align1 size align -- offset2 align2 )
 \ note: this version uses local variables  \ note: this version uses local variables
      create      (Field) \  Header reveal dofield: cfa,
         >r rot r@ nalign  dup ,  ( align1 size offset )          >r rot r@ nalign  dup ,  ( align1 size offset )
         + swap r> nalign ;          + swap r> nalign ;
   
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 0 1 chars end-struct struct  0 1 chars end-struct struct
   
 : field  ( offset1 align1 size align -- offset2 align2 )  \ : field  ( offset1 align1 size align -- offset2 align2 )
     create-field  \    create-field
     does> ( addr1 -- addr2 )  \    does> ( addr1 -- addr2 )
         @ + ;  \       @ + ;
   
 \ I don't really like the "type:" syntax. Any other ideas? - anton  \ I don't really like the "type:" syntax. Any other ideas? - anton
 \ Also, this seems to be somewhat general. It probably belongs to some  \ Also, this seems to be somewhat general. It probably belongs to some
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 : floats: ( n -- size align )  : floats: ( n -- size align )
     floats 1 floats ;      floats 1 floats ;
   
 \ dfoats and sfloats is not yet defined  
 \ : dfloats: ( n -- size align )  
 \     dfloats 1 dfloats ;  
 \   
 \ : sfloats: ( n -- size align )  
 \     sfloats 1 sfloats ;  
   
   : dfloats: ( n -- size align )
       dfloats 1 dfloats ;
   
   : sfloats: ( n -- size align )
       sfloats 1 sfloats ;
   
   : struct-align ( size align -- )
       dp @ swap nalign dp !
       drop ;
   
   : struct-allot ( size align -- addr )
       over swap struct-align
       here swap allot ;
   
   : struct-allocate ( size align -- addr ior )
       drop allocate ;

Removed from v.1.1  
changed lines
  Added in v.1.9


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