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| 1 : | pazsan | 1.4 | \ Interpretative Structuren 16feb92py |
| 2 : | anton | 1.1 | |
| 3 : | anton | 1.6 | \ Copyright (C) 1995 Free Software Foundation, Inc. |
| 4 : | |||
| 5 : | \ This file is part of Gforth. | ||
| 6 : | |||
| 7 : | \ Gforth is free software; you can redistribute it and/or | ||
| 8 : | \ modify it under the terms of the GNU General Public License | ||
| 9 : | \ as published by the Free Software Foundation; either version 2 | ||
| 10 : | \ of the License, or (at your option) any later version. | ||
| 11 : | |||
| 12 : | \ This program is distributed in the hope that it will be useful, | ||
| 13 : | \ but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 : | \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 15 : | \ GNU General Public License for more details. | ||
| 16 : | |||
| 17 : | \ You should have received a copy of the GNU General Public License | ||
| 18 : | \ along with this program; if not, write to the Free Software | ||
| 19 : | \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
| 20 : | |||
| 21 : | |||
| 22 : | pazsan | 1.4 | Variable countif |
| 23 : | anton | 1.1 | |
| 24 : | pazsan | 1.4 | : dummy ; immediate |
| 25 : | : >exec >r ; restrict ( :-) | ||
| 26 : | : scanIF f83find dup 0= IF drop ['] dummy >name THEN ; | ||
| 27 : | |||
| 28 : | Create [struct]-search ' scanIF A, ' (reveal) A, ' drop A, | ||
| 29 : | Create [struct]-voc NIL A, G [struct]-search T A, | ||
| 30 : | NIL A, NIL A, | ||
| 31 : | |||
| 32 : | : ?if countif @ 0< | ||
| 33 : | IF [ [struct]-voc 3 cells + ] ALiteral @ lookup ! THEN ; | ||
| 34 : | |||
| 35 : | UNLOCK Tlast @ NIL Tlast ! LOCK | ||
| 36 : | |||
| 37 : | : [IF] 1 countif +! ?if ; immediate | ||
| 38 : | : [THEN] -1 countif +! ?if ; immediate | ||
| 39 : | : [ELSE] postpone [THEN] r> >exec postpone [IF] ; | ||
| 40 : | immediate | ||
| 41 : | ' [IF] Alias [IFDEF] immediate | ||
| 42 : | ' [IF] Alias [IFUNDEF] immediate | ||
| 43 : | anton | 1.5 | ' [THEN] Alias [ENDIF] immediate |
| 44 : | pazsan | 1.4 | ' [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 : | 1 cells - G [struct]-voc T ! | ||
| 59 : | |||
| 60 : | \ Interpretative Structuren 30apr92py | ||
| 61 : | |||
| 62 : | : defined bl word find nip 0<> ; immediate | ||
| 63 : | : [IF] 0= IF countif off | ||
| 64 : | lookup @ [ [struct]-voc 3 cells + ] ALiteral ! | ||
| 65 : | [struct]-voc lookup ! | ||
| 66 : | THEN ; immediate | ||
| 67 : | : [IFDEF] postpone defined postpone [IF] ; immediate | ||
| 68 : | : [IFUNDEF] postpone defined 0= postpone [IF] ; immediate | ||
| 69 : | : [ELSE] 0 postpone [IF] ; immediate | ||
| 70 : | : [THEN] ; immediate | ||
| 71 : | anton | 1.5 | : [ENDIF] ; immediate |
| 72 : | pazsan | 1.4 | |
| 73 : | \ Structs for interpreter 28nov92py | ||
| 74 : | |||
| 75 : | User (i) | ||
| 76 : | |||
| 77 : | : [DO] ( start end -- ) >in @ -rot | ||
| 78 : | DO I (i) ! dup >r >in ! interpret r> swap +LOOP drop ; | ||
| 79 : | immediate | ||
| 80 : | : [?DO] 2dup = IF 2drop postpone [ELSE] ELSE postpone [DO] THEN ; | ||
| 81 : | immediate | ||
| 82 : | : [+LOOP] ( n -- ) rdrop rdrop ; immediate | ||
| 83 : | : [LOOP] ( -- ) 1 rdrop rdrop ; immediate | ||
| 84 : | : [FOR] ( n -- ) 0 swap postpone [DO] ; immediate | ||
| 85 : | : [NEXT] ( n -- ) -1 rdrop rdrop ; immediate | ||
| 86 : | anton | 1.7 | : [I] ( -- index ) (I) @ postpone Literal ; immediate restrict |
| 87 : | pazsan | 1.4 | : [BEGIN] >in @ >r BEGIN r@ >in ! interpret UNTIL rdrop ; |
| 88 : | immediate | ||
| 89 : | ' [+LOOP] Alias [UNTIL] immediate | ||
| 90 : | : [REPEAT] ( -- ) false rdrop rdrop ; immediate | ||
| 91 : | ' [REPEAT] Alias [AGAIN] immediate | ||
| 92 : | : [WHILE] ( flag -- ) | ||
| 93 : | 0= IF postpone [ELSE] true rdrop rdrop 1 countif +! THEN ; | ||
| 94 : | immediate | ||
| 95 : | anton | 1.1 |
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