[gforth] / gforth / extend.fs  

gforth: gforth/extend.fs

Diff for /gforth/extend.fs between version 1.3 and 1.4

version 1.3, Sat May 7 14:55:48 1994 UTC version 1.4, Thu Jul 21 10:52:39 1994 UTC
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   (constant) , ;    (constant) , ;
 \ !! 2value  \ !! 2value
   
 : 2>r   postpone >r postpone >r ; immediate restrict  : 2>r   postpone swap postpone >r postpone >r ; immediate restrict
 : 2r>   postpone r> postpone r> ; immediate restrict  : 2r>   postpone r> postpone r> postpone swap ; immediate restrict
 : 2r@   postpone 2r> postpone 2dup postpone 2>r ; immediate restrict  : 2r@   postpone 2r> postpone 2dup postpone 2>r ; immediate restrict
   
 : 2Literal  swap postpone Literal  postpone Literal ;  : 2Literal  swap postpone Literal  postpone Literal ;
   immediate restrict    immediate restrict
   
   : m*/    ( d1 n2 u3 -- dqout )    >r s>d >r abs -rot
     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
     r> IF dnegate THEN ;
   
 \ CASE OF ENDOF ENDCASE                                 17may93jaw  \ CASE OF ENDOF ENDCASE                                 17may93jaw
   
 \ just as described in dpANS5  \ just as described in dpANS5
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 \ UNUSED                                                17may93jaw  \ UNUSED                                                17may93jaw
   
 : unused   forthstart dup @ over 2 cells + @ -  : unused   s0 @ 512 -        \ for stack
            512 -        \ for stack             here - ;
            + here - ;  
   
 \ [COMPILE]                                             17may93jaw  \ [COMPILE]                                             17may93jaw
   
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 \ SOURCE-ID SAVE-INPUT RESTORE-INPUT                    11jun93jaw  \ SOURCE-ID SAVE-INPUT RESTORE-INPUT                    11jun93jaw
   
 : source-id ( -- 0 | -1 | fileid )  : source-id ( -- 0 | -1 | fileid )
   loadfile @ dup 0= IF drop linestart @ THEN ;    loadfile @ dup 0= IF  drop loadline @ 0 min  THEN ;
   
 : save-input ( -- x1 .. xn n )  : save-input ( -- x1 .. xn n )
   >in @    >in @
   loadfile @ ?dup    loadfile @ ?dup
   IF    linestart 2@ loadline @ 6    IF    dup file-position throw loadline @ >tib @ 6
   ELSE  loadline @ blk @ linestart @ 5 THEN          #tib @ >tib +!
   >tib @ swap ; \ >tib for security    ELSE  loadline @ blk @ linestart @ >tib @ 5 THEN
   ;
   
 : restore-input ( x1 .. xn n -- flag )  : restore-input ( x1 .. xn n -- flag )
   1- swap >tib @ <> IF discard true EXIT THEN    swap >tib !
   5 = IF   loadline ! 2dup linestart 2! rot dup loadfile !    6 = IF   loadline ! rot dup loadfile !
            reposition-file IF drop true EXIT THEN             reposition-file IF drop true EXIT THEN
            refill 0= IF drop true EXIT THEN  
       ELSE linestart ! blk !        ELSE linestart ! blk !
            dup loadline @ <> IF 2drop true EXIT THEN             dup loadline @ <> IF 2drop true EXIT THEN
            loadline !             loadline !

Generate output suitable for use with a patch program
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Removed from v.1.3  
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  Added in v.1.4
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