Diff for /gforth/extend.fs between versions 1.20 and 1.68

version 1.20, 1997/02/06 21:23:00 version 1.68, 2011/08/10 13:55:02
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 \ EXTEND.FS    CORE-EXT Word not fully tested!         12may93jaw  \ EXTEND.FS    CORE-EXT Word not fully tested!         12may93jaw
   
 \ Copyright (C) 1995 Free Software Foundation, Inc.  \ Copyright (C) 1995,1998,2000,2003,2005,2007,2009,2010 Free Software Foundation, Inc.
   
 \ This file is part of Gforth.  \ This file is part of Gforth.
   
 \ Gforth is free software; you can redistribute it and/or  \ Gforth is free software; you can redistribute it and/or
 \ modify it under the terms of the GNU General Public License  \ modify it under the terms of the GNU General Public License
 \ as published by the Free Software Foundation; either version 2  \ as published by the Free Software Foundation, either version 3
 \ of the License, or (at your option) any later version.  \ of the License, or (at your option) any later version.
   
 \ This program is distributed in the hope that it will be useful,  \ This program is distributed in the hope that it will be useful,
Line 15 Line 15
 \ GNU General Public License for more details.  \ GNU General Public License for more details.
   
 \ You should have received a copy of the GNU General Public License  \ You should have received a copy of the GNU General Public License
 \ along with this program; if not, write to the Free Software  \ along with this program. If not, see http://www.gnu.org/licenses/.
 \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  
   
   
 \ May be cross-compiled  \ May be cross-compiled
Line 25  decimal Line 24  decimal
   
 \ .(                                                    12may93jaw  \ .(                                                    12may93jaw
   
 : .(   ( compilation "...<paren>" -- ) \ core-ext dot-paren  : .(   ( compilation&interpretation "ccc<paren>" -- ) \ core-ext dot-paren
     [char] ) parse type ; immediate    \G Compilation and interpretation semantics: Parse a string @i{ccc}
     \G delimited by a @code{)} (right parenthesis). Display the
     \G string. This is often used to display progress information during
     \G compilation; see examples below.
     [char] ) parse type ; immediate
   
 \ VALUE 2>R 2R> 2R@                                     17may93jaw  \ VALUE 2>R 2R> 2R@                                     17may93jaw
   
 : value ( w "name" -- ) \ core-ext  
   (constant) , ;  
 \ !! 2value  \ !! 2value
   
   [ifundef] 2literal
 : 2Literal ( compilation w1 w2 -- ; run-time  -- w1 w2 ) \ double two-literal  : 2Literal ( compilation w1 w2 -- ; run-time  -- w1 w2 ) \ double two-literal
       \G Compile appropriate code such that, at run-time, cell pair @i{w1, w2} are
       \G placed on the stack. Interpretation semantics are undefined.
     swap postpone Literal  postpone Literal ; immediate restrict      swap postpone Literal  postpone Literal ; immediate restrict
   [then]
   
 ' drop alias d>s ( d -- n ) \ double            d_to_s  ' drop alias d>s ( d -- n ) \ double            d_to_s
   
 : m*/ ( d1 n2 u3 -- dqout ) \ double m-star-slash  : m*/ ( d1 n2 u3 -- dquot ) \ double m-star-slash
       \G dquot=(d1*n2)/u3, with the intermediate result being triple-precision.
       \G In ANS Forth u3 can only be a positive signed number.
     >r s>d >r abs -rot      >r s>d >r abs -rot
     s>d r> xor r> swap >r >r dabs rot tuck um* 2swap um*      s>d r> xor r> swap >r >r dabs rot tuck um* 2swap um*
     swap >r 0 d+ r> -rot r@ um/mod -rot r> um/mod nip swap      swap >r 0 d+ r> -rot r@ um/mod -rot r> um/mod
     r> IF dnegate THEN ;      [ 1 -3 mod 0< ] [if]
           -rot r> IF IF 1. d+ THEN dnegate ELSE drop THEN
       [else]
           nip swap r> IF dnegate THEN
       [then] ;
   
 \ CASE OF ENDOF ENDCASE                                 17may93jaw  \ CASE OF ENDOF ENDCASE                                 17may93jaw
   
Line 52  decimal Line 63  decimal
 0 CONSTANT case ( compilation  -- case-sys ; run-time  -- ) \ core-ext  0 CONSTANT case ( compilation  -- case-sys ; run-time  -- ) \ core-ext
     immediate      immediate
   
   : ?of ( compilation  -- of-sys ; run-time  f -- ) \ gforth
       1+ >r POSTPONE if r> ; immediate
   
 : of ( compilation  -- of-sys ; run-time x1 x2 -- |x1 ) \ core-ext  : of ( compilation  -- of-sys ; run-time x1 x2 -- |x1 ) \ core-ext
     \ !! the implementation does not match the stack effect      \ !! the implementation does not match the stack effect
     1+ >r      postpone over postpone = postpone ?of postpone drop ; immediate
     postpone over postpone = postpone if postpone drop  
     r> ; immediate  
   
 : endof ( compilation case-sys1 of-sys -- case-sys2 ; run-time  -- ) \ core-ext end-of  : endof ( compilation case-sys1 of-sys -- case-sys2 ; run-time  -- ) \ core-ext end-of
     >r postpone else r> ; immediate      >r postpone else r> ; immediate
Line 67  decimal Line 79  decimal
   
 \ C"                                                    17may93jaw  \ C"                                                    17may93jaw
   
 : (c")     "lit ;  : C" ( compilation "ccc<quote>" -- ; run-time  -- c-addr ) \ core-ext c-quote
       \G Compilation: parse a string @i{ccc} delimited by a @code{"}
 : CLiteral      \G (double quote). At run-time, return @i{c-addr} which
     postpone (c") here over char+ allot  place align ; immediate restrict      \G specifies the counted string @i{ccc}.  Interpretation
       \G semantics are undefined.
 : C" ( compilation "...<quote>" -- ; run-time  -- c-addr ) \ core-ext c-quote  
     [char] " parse postpone CLiteral ; immediate restrict      [char] " parse postpone CLiteral ; immediate restrict
   
 \ UNUSED                                                17may93jaw  
   
 : unused ( -- u ) \ core-ext  
     forthstart dup 3 cells + @ + here - ;  
   
 \ [COMPILE]                                             17may93jaw  \ [COMPILE]                                             17may93jaw
   
 : [compile] ( compilation "name" -- ; run-time ? -- ? ) \ core-ext bracket-compile  : [compile] ( compilation "name" -- ; run-time ? -- ? ) \ core-ext bracket-compile
     ' compile, ; immediate      comp' drop
       dup [ comp' exit drop ] literal = if
 \ MARKER                                                17may93jaw          execute \ EXIT has default compilation semantics, perform them
       else
 \ : marker here last @ create , , DOES> dup @ last ! cell+ @ dp ! ;          compile,
 \ doesn't work now. vocabularies?      then ; immediate
   
 \ CONVERT                                               17may93jaw  \ CONVERT                                               17may93jaw
   
 : convert ( ud1 c-addr1 -- ud2 c-addr2 ) \ core-ext  : convert ( ud1 c-addr1 -- ud2 c-addr2 ) \ core-ext-obsolescent
     \ obsolescent; superseded by @code{>number}.      \G Obsolescent: superseded by @code{>number}.
     true >number drop ;      char+ true >number drop ;
   
 \ ERASE                                                 17may93jaw  \ ERASE                                                 17may93jaw
   
 : erase ( addr len -- ) \ core-ext  : erase ( addr u -- ) \ core-ext
       \G Clear all bits in @i{u} aus starting at @i{addr}.
     \ !! dependence on "1 chars 1 ="      \ !! dependence on "1 chars 1 ="
     ( 0 1 chars um/mod nip )  0 fill ;      ( 0 1 chars um/mod nip )  0 fill ;
 : blank ( addr len -- ) \ string  : blank ( c-addr u -- ) \ string
       \G Store the space character into @i{u} chars starting at @i{c-addr}.
     bl fill ;      bl fill ;
   
 \ SEARCH                                                02sep94py  \ SEARCH                                                02sep94py
   
 : search   ( buf buflen text textlen -- restbuf restlen flag ) \ string  : search ( c-addr1 u1 c-addr2 u2 -- c-addr3 u3 flag ) \ string
     2over  2 pick - 1+ 3 pick c@ >r      \G Search the string specified by @i{c-addr1, u1} for the string
     BEGIN      \G specified by @i{c-addr2, u2}. If @i{flag} is true: match was found
         r@ scan dup      \G at @i{c-addr3} with @i{u3} characters remaining. If @i{flag} is false:
     WHILE      \G no match was found; @i{c-addr3, u3} are equal to @i{c-addr1, u1}.
         >r >r  2dup r@ -text      \ not very efficient; but if we want efficiency, we'll do it as primitive
         0=      2>r 2dup
         IF      begin
             >r drop 2drop r> r> r> rot + 1- rdrop true          dup r@ >=
             EXIT      while
         THEN          2dup 2r@ string-prefix? if
         r> r>  1 /string              2swap 2drop 2r> 2drop true exit
     REPEAT          endif
     2drop 2drop  rdrop false ;          1 /string
       repeat
       2drop 2r> 2drop false ;
   
 \ SOURCE-ID SAVE-INPUT RESTORE-INPUT                    11jun93jaw  \ SOURCE-ID SAVE-INPUT RESTORE-INPUT                    11jun93jaw
   
 : source-id ( -- 0 | -1 | fileid ) \ core-ext source-i-d  [IFUNDEF] source-id
   loadfile @ dup 0= IF  drop sourceline# 0 min  THEN ;  : source-id ( -- 0 | -1 | fileid ) \ core-ext,file source-i-d
       \G Return 0 (the input source is the user input device), -1 (the
 : save-input ( -- x1 .. xn n ) \ core-ext      \G input source is a string being processed by @code{evaluate}) or
       \G a @i{fileid} (the input source is the file specified by
       \G @i{fileid}).
       loadfile @ dup 0= IF  drop sourceline# 0 min  THEN ;
   
   : save-input ( -- xn .. x1 n ) \ core-ext
       \G The @i{n} entries @i{xn - x1} describe the current state of the
       \G input source specification, in some platform-dependent way that can
       \G be used by @code{restore-input}.
     >in @      >in @
     loadfile @      loadfile @
     if      if
         loadfile @ file-position throw          loadfile @ file-position throw
           [IFDEF] #fill-bytes #fill-bytes @ [ELSE] #tib @ 1+ [THEN] 0 d-
     else      else
         blk @          blk @
         linestart @          linestart @
Line 140  decimal Line 159  decimal
     source-id      source-id
     6 ;      6 ;
   
 : restore-input ( x1 .. xn n -- flag ) \ core-ext  : restore-input ( xn .. x1 n -- flag ) \ core-ext
       \G Attempt to restore the input source specification to the state
       \G described by the @i{n} entries @i{xn - x1}. @i{flag} is
       \G true if the restore fails.  In Gforth it fails pretty often
       \G (and sometimes with a @code{throw}).
     6 <> -12 and throw      6 <> -12 and throw
     source-id <> -12 and throw      source-id <> -12 and throw
     >tib !      >tib !
Line 148  decimal Line 171  decimal
     loadfile @ 0<>      loadfile @ 0<>
     if      if
         loadfile @ reposition-file throw          loadfile @ reposition-file throw
           refill 0= -36 and throw \ should never throw
     else      else
         linestart !          linestart !
         blk !          blk !
Line 159  decimal Line 183  decimal
     r> loadline !      r> loadline !
     >in !      >in !
     false ;      false ;
   [THEN]
 \ This things we don't need, but for being complete... jaw  \ This things we don't need, but for being complete... jaw
   
 \ EXPECT SPAN                                           17may93jaw  \ EXPECT SPAN                                           17may93jaw
   
 variable span ( -- a-addr ) \ core-ext  variable span ( -- c-addr ) \ core-ext-obsolescent
 \ obsolescent  \G @code{Variable} -- @i{c-addr} is the address of a cell that stores the
   \G length of the last string received by @code{expect}. OBSOLESCENT.
 : expect ( c-addr +len -- ) \ core-ext  
     \ obsolescent; use accept  : expect ( c-addr +n -- ) \ core-ext-obsolescent
       \G Receive a string of at most @i{+n} characters, and store it
       \G in memory starting at @i{c-addr}. The string is
       \G displayed. Input terminates when the <return> key is pressed or
       \G @i{+n} characters have been received. The normal Gforth line
       \G editing capabilites are available. The length of the string is
       \G stored in @code{span}; it does not include the <return>
       \G character. OBSOLESCENT: superceeded by @code{accept}.
       everyline
     0 rot over      0 rot over
     BEGIN ( maxlen span c-addr pos1 )      BEGIN ( maxlen span c-addr pos1 )
         key decode ( maxlen span c-addr pos2 flag )          xkey decode ( maxlen span c-addr pos2 flag )
         >r 2over = r> or          >r 2over = r> or
     UNTIL      UNTIL
     2 pick swap /string type      2 pick swap /string type
     nip span ! ;      nip span ! ;
   
   \ marker                                               18dec94py
   
   \ Marker creates a mark that is removed (including everything 
   \ defined afterwards) when executing the mark.
   
   : included-files-mark ( -- u )
       included-files @ ;
   
   \ hmm, most of the saving appears to be pretty unnecessary: we could
   \ derive the wordlists and the words that have to be kept from the
   \ saved value of dp value. - anton
   
   : marker, ( -- mark )
       here
       included-files-mark ,
       dup A, \ here
       voclink @ A, \ vocabulary list start
       \ for all wordlists, remember wordlist-id (the linked list)
       voclink
       BEGIN
           @ dup
       WHILE
           dup 0 wordlist-link - wordlist-id @ A,
       REPEAT
       drop
       \ remember udp
       udp @ ,
       \ remember dyncode-ptr
       here ['] noop , compile-prim1 finish-code ;
   
   : marker! ( mark -- )
       \ reset included files count; resize will happen on next add-included-file
       included-files @ over @ min included-files ! cell+
       \ rest of marker!
       dup @ swap cell+ ( here rest-of-marker )
       dup @ voclink ! cell+
       \ restore wordlists to former words
       voclink
       BEGIN
           @ dup 
       WHILE
           over @ over 0 wordlist-link - wordlist-id !
           swap cell+ swap
       REPEAT
       drop
       \ rehash wordlists to remove forgotten words
       \ why don't we do this in a single step? - anton
       voclink
       BEGIN
           @ dup
       WHILE
           dup 0 wordlist-link - rehash
       REPEAT
       drop
       \ restore udp and dp
   [IFDEF] forget-dyncode
       dup cell+ @ forget-dyncode drop
   [THEN]
       @ udp !  dp !
       \ clean up vocabulary stack
       0 vp @ 0
       ?DO
           vp cell+ I cells + @ dup here >
           IF  drop  ELSE  swap 1+  THEN
       LOOP
       dup 0= or set-order \ -1 set-order if order is empty
       get-current here > IF
           forth-wordlist set-current
       THEN ;
   
   : marker ( "<spaces> name" -- ) \ core-ext
       \G Create a definition, @i{name} (called a @i{mark}) whose
       \G execution semantics are to remove itself and everything 
       \G defined after it.
       marker, Create A,
   DOES> ( -- )
       @ marker! ;
   

Removed from v.1.20  
changed lines
  Added in v.1.68


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