File:  [gforth] / gforth / extend.fs
Revision 1.3: download - view: text, annotated - select for diffs
Sat May 7 14:55:48 1994 UTC (25 years, 7 months ago) by anton
Branches: MAIN
CVS tags: HEAD
local variables
rewrote primitives2c.el in Forth (prims2x.el)
various small changes
Added Files:
 	from-cut-here gforth.el gforth.texi glocals.fs gray.fs
 	locals-test.fs prims2x.fs

    1: \ EXTEND.FS    CORE-EXT Word not fully tested!         12may93jaw
    2: 
    3: \ May be cross-compiled
    4: 
    5: decimal
    6: 
    7: \ .(                                                    12may93jaw
    8: 
    9: : .(    [char] ) parse type ;
   10: 
   11: \ VALUE 2>R 2R> 2R@                                     17may93jaw
   12: 
   13: : value ( n -- )
   14:   (constant) , ;
   15: \ !! 2value
   16: 
   17: : 2>r   postpone >r postpone >r ; immediate restrict
   18: : 2r>   postpone r> postpone r> ; immediate restrict
   19: : 2r@   postpone 2r> postpone 2dup postpone 2>r ; immediate restrict
   20: 
   21: : 2Literal  swap postpone Literal  postpone Literal ;
   22:   immediate restrict
   23: 
   24: \ CASE OF ENDOF ENDCASE                                 17may93jaw
   25: 
   26: \ just as described in dpANS5
   27: 
   28: 0 CONSTANT case immediate
   29: 
   30: : of
   31:         1+ >r
   32:         postpone over postpone = postpone if postpone drop
   33:         r> ; immediate
   34: 
   35: : endof
   36:         >r postpone else r> ; immediate
   37: 
   38: : endcase
   39:         postpone drop
   40:         0 ?do postpone then loop ; immediate
   41: 
   42: \ C"                                                    17may93jaw
   43: 
   44: : (c")     "lit ;
   45: 
   46: : CLiteral postpone (c") here over char+ allot  place align ;
   47:                                               immediate restrict
   48: : C"       [char] " parse postpone CLiteral ; immediate restrict
   49: 
   50: \ UNUSED                                                17may93jaw
   51: 
   52: : unused   forthstart dup @ over 2 cells + @ -
   53:            512 -        \ for stack
   54:            + here - ;
   55: 
   56: \ [COMPILE]                                             17may93jaw
   57: 
   58: : [compile] 
   59:  ' compile, ; immediate
   60: 
   61: \ MARKER                                                17may93jaw
   62: 
   63: \ : marker here last @ create , , DOES> dup @ last ! cell+ @ dp ! ;
   64: \ doesn't work now. vocabularies?
   65: 
   66: \ CONVERT                                               17may93jaw
   67: 
   68: : convert true >number drop ;
   69: 
   70: \ ERASE                                                 17may93jaw
   71: 
   72: : erase ( 0 1 chars um/mod nip )  0 fill ;
   73: : blank ( 0 1 chars um/mod nip ) bl fill ;
   74: 
   75: \ ROLL                                                  17may93jaw
   76: 
   77: : roll  dup 1+ pick >r
   78:         cells sp@ 2 cells + dup cell+ rot move drop r> ;
   79: 
   80: \ SOURCE-ID SAVE-INPUT RESTORE-INPUT                    11jun93jaw
   81: 
   82: : source-id ( -- 0 | -1 | fileid )
   83:   loadfile @ dup 0= IF drop linestart @ THEN ;
   84: 
   85: : save-input ( -- x1 .. xn n )
   86:   >in @
   87:   loadfile @ ?dup
   88:   IF    linestart 2@ loadline @ 6
   89:   ELSE  loadline @ blk @ linestart @ 5 THEN
   90:   >tib @ swap ; \ >tib for security
   91: 
   92: : restore-input ( x1 .. xn n -- flag )
   93:   1- swap >tib @ <> IF discard true EXIT THEN
   94:   5 = IF   loadline ! 2dup linestart 2! rot dup loadfile !
   95:            reposition-file IF drop true EXIT THEN
   96:            refill 0= IF drop true EXIT THEN
   97:       ELSE linestart ! blk !
   98:            dup loadline @ <> IF 2drop true EXIT THEN
   99:            loadline !
  100:       THEN
  101:   >in ! false ;
  102: 
  103: 
  104: 
  105: \ This things we don't need, but for being complete... jaw
  106: 
  107: \ EXPECT SPAN                                           17may93jaw
  108: 
  109: variable span
  110: 
  111: : expect ( c-addr +len -- )
  112:   0 rot over
  113:   BEGIN  key decode >r 2over = r> or  UNTIL
  114:   2drop nip span ! ;
  115: 

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>