File:  [gforth] / gforth / kernel / toolsext.fs
Revision 1.6: download - view: text, annotated - select for diffs
Tue Dec 8 22:03:14 1998 UTC (23 years, 8 months ago) by anton
Branches: MAIN
CVS tags: v0-4-0, HEAD
updated dates in copyright messages
inserted copyright messages in most files that did not have them
removed outdated files engine/32bit.h engine/strsig.c

    1: \ Copyright (C) 1995,1998 Free Software Foundation, Inc.
    2: 
    3: \ This file is part of Gforth.
    4: 
    5: \ Gforth is free software; you can redistribute it and/or
    6: \ modify it under the terms of the GNU General Public License
    7: \ as published by the Free Software Foundation; either version 2
    8: \ of the License, or (at your option) any later version.
    9: 
   10: \ This program is distributed in the hope that it will be useful,
   11: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
   12: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   13: \ GNU General Public License for more details.
   14: 
   15: \ You should have received a copy of the GNU General Public License
   16: \ along with this program; if not, write to the Free Software
   17: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   18: 
   19: Warnings off
   20: 
   21: Variable countif
   22: 
   23: : dummy ;  immediate
   24: : >exec  >r ; restrict ( :-)
   25: : scanIF   f83find  dup 0=  IF  drop ['] dummy >name  THEN  ;
   26: 
   27: Create [struct]-search    ' scanIF A,  ' (reveal) A,  ' drop A, ' drop A,
   28: Create [struct]-voc       [struct]-search A,
   29:                           NIL A,       NIL A,       NIL A,
   30: 
   31: : ?if  countif @ 0<
   32:   IF  [ [struct]-voc 3 cells + ] ALiteral @ lookup !  THEN ;
   33: 
   34: UNLOCK  Tlast @ TNIL Tlast !  LOCK
   35: \ last @  0 last !
   36: 
   37: : [IF]      1 countif +! ?if ;       immediate
   38: : [THEN]   -1 countif +! ?if ;       immediate
   39: : [ELSE]   postpone [THEN] postpone [IF] ;
   40:                                      immediate
   41: ' [IF]   Alias [IFDEF]               immediate
   42: ' [IF]   Alias [IFUNDEF]             immediate
   43: ' [THEN] Alias [ENDIF]                immediate
   44: ' [IF]   Alias [BEGIN]               immediate
   45: ' [IF]   Alias [WHILE]               immediate
   46: ' [THEN] Alias [UNTIL]               immediate
   47: ' [THEN] Alias [AGAIN]               immediate
   48: ' [IF]   Alias [DO]                  immediate
   49: ' [IF]   Alias [?DO]                 immediate
   50: ' [THEN] Alias [LOOP]                immediate
   51: ' [THEN] Alias [+LOOP]               immediate
   52: : [REPEAT]  postpone [AGAIN] postpone [THEN] ;
   53:                                      immediate
   54: ' ( Alias (                          immediate
   55: ' \ Alias \                          immediate
   56: 
   57: UNLOCK Tlast @ swap Tlast ! LOCK
   58: \ last @ swap last !
   59: 1 cells - [struct]-voc cell+ !
   60: 
   61: \ Interpretative Structuren                            30apr92py
   62: 
   63: : defined   bl word find nip 0<> ; immediate
   64: : [IF] 0= IF  countif off
   65:               lookup @ [ [struct]-voc 3 cells + ] ALiteral !
   66: 	      [struct]-voc lookup !
   67:           THEN ;                                      immediate
   68: : [IFDEF]   postpone defined    postpone [IF] ;       immediate
   69: : [IFUNDEF] postpone defined 0= postpone [IF] ;       immediate
   70: : [ELSE] 0 postpone [IF] ;                            immediate
   71: : [THEN] ;                                            immediate
   72: : [ENDIF] ;                                           immediate
   73: 
   74: \ Structs for interpreter                              28nov92py
   75: 
   76: User (i)
   77: 
   78: : [DO]  ( start end -- )  >in @ -rot
   79:   DO   I (i) ! dup >r >in ! interpret r> swap +LOOP  drop ;
   80:                                                       immediate
   81: : [?DO] 2dup = IF 2drop postpone [ELSE] ELSE postpone [DO] THEN ;
   82:                                                       immediate
   83: : [+LOOP] ( n -- ) rdrop rdrop ;                      immediate
   84: : [LOOP] ( -- ) 1 rdrop rdrop ;                       immediate
   85: : [FOR] ( n -- )  0 swap postpone [DO] ;              immediate
   86: : [NEXT] ( n -- ) -1 rdrop rdrop ;                    immediate
   87: :noname (i) @ ;
   88: :noname (i) @ postpone Literal ;
   89: interpret/compile: [I]
   90: : [BEGIN] >in @ >r BEGIN r@ >in ! interpret UNTIL rdrop ;
   91:                                                       immediate
   92: ' [+LOOP]  Alias [UNTIL] immediate
   93: : [REPEAT]  ( -- )  false rdrop rdrop ;               immediate
   94: ' [REPEAT] Alias [AGAIN] immediate
   95: : [WHILE]   ( flag -- )
   96:   0= IF   postpone [ELSE] true rdrop rdrop 1 countif +!  THEN ;
   97:                                                       immediate
   98: 
   99: Warnings on

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