Diff for /gforth/glocals.fs between versions 1.62 and 1.67

version 1.62, 2011/12/27 16:38:08 version 1.67, 2012/02/09 17:27:37
Line 1 Line 1
 \ A powerful locals implementation  \ A powerful locals implementation
   
 \ Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2007 Free Software Foundation, Inc.  \ Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2007,2011 Free Software Foundation, Inc.
   
 \ This file is part of Gforth.  \ This file is part of Gforth.
   
Line 79 Line 79
 \ aligned correctly, but our locals stack must be float-aligned between  \ aligned correctly, but our locals stack must be float-aligned between
 \ words.  \ words.
   
 \ Other things about the internals are pretty unclear now.  
   
 \ Currently locals may only be  
 \ defined at the outer level and TO is not supported.  
   
 require search.fs  require search.fs
 require float.fs  require float.fs
 require extend.fs \ for case  require extend.fs \ for case
   
 : save-mem-dict ( addr1 u -- addr2 u )  
     here swap dup allot ( addr1 addr2 u )  
     2dup 2>r move 2r> ;  
   
 : compile-@local ( n -- ) \ gforth compile-fetch-local  : compile-@local ( n -- ) \ gforth compile-fetch-local
  case   case
     0       of postpone @local0 endof      0       of postpone @local0 endof
Line 174  variable locals-mem-list \ linked list o Line 165  variable locals-mem-list \ linked list o
   
 \ locals list operations  \ locals list operations
   
 : common-list ( list1 list2 -- list3 ) \ gforth-internal  : list-length ( list -- u )
 \ list1 and list2 are lists, where the heads are at higher addresses than      0 swap begin ( u1 list1 )
 \ the tail. list3 is the largest sublist of both lists.          dup while
  begin              @ swap 1+ swap
    2dup u<>      repeat
  while      drop ;
    2dup u>  
    if  : /list ( list1 u -- list2 )
      swap      \ list2 is list1 with the first u elements removed
    then      0 ?do
    @          @
  repeat      loop ;
  drop ;  
   : common-list ( list1 list2 -- list3 )
 : sub-list? ( list1 list2 -- f ) \ gforth-internal      \ list3 is the largest common tail of both lists.
 \ true iff list1 is a sublist of list2      over list-length over list-length - dup 0< if
  begin          negate >r swap r>
    2dup u<      then ( long short u )
  while      rot swap /list begin ( list3 list4 )
    @          2dup u<> while
  repeat              @ swap @
  = ;      repeat
       drop ;
   
   : sub-list? ( list1 list2 -- f )
       \ true iff list1 is a sublist of list2
       over list-length over list-length swap - 0 max /list = ;
   
   \ : ocommon-list ( list1 list2 -- list3 ) \ gforth-internal
   \ \ list1 and list2 are lists, where the heads are at higher addresses than
   \ \ the tail. list3 is the largest sublist of both lists.
   \  begin
   \    2dup u<>
   \  while
   \    2dup u>
   \    if
   \      swap
   \    then
   \    @
   \  repeat
   \  drop ;
   
   \ : osub-list? ( list1 list2 -- f ) \ gforth-internal
   \ \ true iff list1 is a sublist of list2
   \  begin
   \    2dup u<
   \  while
   \    @
   \  repeat
   \  = ;
   
   \ defer common-list
   \ defer sub-list?
   
   \ ' ocommon-list is common-list
   \ ' osub-list?   is sub-list?
   
 : list-size ( list -- u ) \ gforth-internal  : list-size ( list -- u ) \ gforth-internal
     \ size of the locals frame represented by list      \ size of the locals frame represented by list
Line 217  variable locals-mem-list \ linked list o Line 242  variable locals-mem-list \ linked list o
 \ warn if list is not a sublist of locals-list  \ warn if list is not a sublist of locals-list
  locals-list @ sub-list? 0= if   locals-list @ sub-list? 0= if
    \ !! print current position     \ !! print current position
    ." compiler was overly optimistic about locals at a BEGIN" cr       >stderr ." compiler was overly optimistic about locals at a BEGIN" cr
    \ !! print assumption and reality     \ !! print assumption and reality
  then ;   then ;
   
Line 542  forth definitions Line 567  forth definitions
     latest latestxt      latest latestxt
     clear-leave-stack      clear-leave-stack
     0 locals-size !      0 locals-size !
     locals-mem-list @ free-list  
     0 locals-mem-list !  
     0 locals-list !      0 locals-list !
     dead-code off      dead-code off
     defstart ;      defstart ;
   
   :noname ( -- )
       locals-mem-list @ free-list
       0 locals-mem-list ! ;
   is free-old-local-names
   
 : locals-;-hook ( sys addr xt sys -- sys )  : locals-;-hook ( sys addr xt sys -- sys )
     def?      def?
     0 TO locals-wordlist      0 TO locals-wordlist
Line 627  forth definitions Line 655  forth definitions
 ' locals-:-hook IS :-hook  ' locals-:-hook IS :-hook
 ' locals-;-hook IS ;-hook  ' locals-;-hook IS ;-hook
   
   
 ' (then-like)  IS then-like  ' (then-like)  IS then-like
 ' (begin-like) IS begin-like  ' (begin-like) IS begin-like
 ' (again-like) IS again-like  ' (again-like) IS again-like

Removed from v.1.62  
changed lines
  Added in v.1.67


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