File:  [gforth] / gforth / extend.fs
Revision 1.15: download - view: text, annotated - select for diffs
Fri Feb 9 17:34:09 1996 UTC (24 years ago) by anton
Branches: MAIN
CVS tags: HEAD
?DUP-IF and ?DUP-0=-IF are now supported by primitives
added primitives EMIT-FILE, STDOUT, STDERR
EMIT and TYPE now work through file words
added some code for the BUGGY_LONG_LONG case (not yet complete)
eliminated D! and D@
made DMIN, DMAX, DABS high-level
added compat/control.fs (?DUP-IF etc.)

    1: \ EXTEND.FS    CORE-EXT Word not fully tested!         12may93jaw
    2: 
    3: \ 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: \ May be cross-compiled
   23: 
   24: decimal
   25: 
   26: \ .(                                                    12may93jaw
   27: 
   28: : .(   ( compilation "...<paren>" -- ) \ core-ext dot-paren
   29:     [char] ) parse type ; immediate
   30: 
   31: \ VALUE 2>R 2R> 2R@                                     17may93jaw
   32: 
   33: : value ( w -- ) \ core-ext
   34:   (constant) , ;
   35: \ !! 2value
   36: 
   37: : 2Literal ( compilation w1 w2 -- ; run-time  -- w1 w2 ) \ double two-literal
   38:     swap postpone Literal  postpone Literal ; immediate restrict
   39: 
   40: : dabs ( d1 -- d2 ) \ double
   41:     dup 0< IF dnegate THEN ;
   42: 
   43: : m*/ ( d1 n2 u3 -- dqout ) \ double m-star-slash
   44:     >r s>d >r abs -rot
   45:     s>d r> xor r> swap >r >r dabs rot tuck um* 2swap um*
   46:     swap >r 0 d+ r> -rot r@ um/mod -rot r> um/mod nip swap
   47:     r> IF dnegate THEN ;
   48: 
   49: \ CASE OF ENDOF ENDCASE                                 17may93jaw
   50: 
   51: \ just as described in dpANS5
   52: 
   53: 0 CONSTANT case ( compilation  -- case-sys ; run-time  -- ) \ core-ext
   54:     immediate
   55: 
   56: : of ( compilation  -- of-sys ; run-time x1 x2 -- |x1 ) \ core-ext
   57:     \ !! the implementation does not match the stack effect
   58:     1+ >r
   59:     postpone over postpone = postpone if postpone drop
   60:     r> ; immediate
   61: 
   62: : endof ( compilation case-sys1 of-sys -- case-sys2 ; run-time  -- ) \ core-ext end-of
   63:     >r postpone else r> ; immediate
   64: 
   65: : endcase ( compilation case-sys -- ; run-time x -- ) \ core-ext end-case
   66:     postpone drop
   67:     0 ?do postpone then loop ; immediate
   68: 
   69: \ C"                                                    17may93jaw
   70: 
   71: : (c")     "lit ;
   72: 
   73: : CLiteral
   74:     postpone (c") here over char+ allot  place align ; immediate restrict
   75: 
   76: : C" ( compilation "...<quote>" -- ; run-time  -- c-addr ) \ core-ext c-quote
   77:     [char] " parse postpone CLiteral ; immediate restrict
   78: 
   79: \ UNUSED                                                17may93jaw
   80: 
   81: : unused ( -- u ) \ core-ext
   82:     s0 @ 512 -        \ for stack
   83:     here - ;
   84: 
   85: \ [COMPILE]                                             17may93jaw
   86: 
   87: : [compile] ( compilation "name" -- ; run-time ? -- ? ) \ core-ext bracket-compile
   88:     ' compile, ; immediate
   89: 
   90: \ MARKER                                                17may93jaw
   91: 
   92: \ : marker here last @ create , , DOES> dup @ last ! cell+ @ dp ! ;
   93: \ doesn't work now. vocabularies?
   94: 
   95: \ CONVERT                                               17may93jaw
   96: 
   97: : convert ( ud1 c-addr1 -- ud2 c-addr2 ) \ core-ext
   98:     \ obsolescent; supersedet by @code{>number}.
   99:     true >number drop ;
  100: 
  101: \ ERASE                                                 17may93jaw
  102: 
  103: : erase ( addr len -- ) \ core-ext
  104:     \ !! dependence on "1 chars 1 ="
  105:     ( 0 1 chars um/mod nip )  0 fill ;
  106: : blank ( addr len -- ) \ string
  107:     bl fill ;
  108: 
  109: \ SEARCH                                                02sep94py
  110: 
  111: : search   ( buf buflen text textlen -- restbuf restlen flag ) \ string
  112:     2over  2 pick - 1+ 3 pick c@ >r
  113:     BEGIN
  114: 	r@ scan dup
  115:     WHILE
  116: 	>r >r  2dup r@ -text
  117: 	0=
  118: 	IF
  119: 	    >r drop 2drop r> r> r> rot + 1- rdrop true
  120: 	    EXIT
  121: 	THEN
  122: 	r> r>  1 /string
  123:     REPEAT
  124:     2drop 2drop  rdrop false ;
  125: 
  126: \ ROLL                                                  17may93jaw
  127: 
  128: : roll  ( x0 x1 .. xn n -- x1 .. xn x0 ) \ core-ext
  129:   dup 1+ pick >r
  130:   cells sp@ cell+ dup cell+ rot move drop r> ;
  131: 
  132: \ SOURCE-ID SAVE-INPUT RESTORE-INPUT                    11jun93jaw
  133: 
  134: : source-id ( -- 0 | -1 | fileid ) \ core-ext source-i-d
  135:   loadfile @ dup 0= IF  drop sourceline# 0 min  THEN ;
  136: 
  137: : save-input ( -- x1 .. xn n ) \ core-ext
  138:     >in @
  139:     loadfile @
  140:     if
  141: 	loadfile @ file-position throw
  142:     else
  143: 	blk @
  144: 	linestart @
  145:     then
  146:     sourceline#
  147:     >tib @
  148:     source-id
  149:     6 ;
  150: 
  151: : restore-input ( x1 .. xn n -- flag ) \ core-ext
  152:     6 <> -12 and throw
  153:     source-id <> -12 and throw
  154:     >tib !
  155:     >r ( line# )
  156:     loadfile @ 0<>
  157:     if
  158: 	loadfile @ reposition-file throw
  159:     else
  160: 	linestart !
  161: 	blk !
  162: 	sourceline# r@ <> blk @ 0= and loadfile @ 0= and
  163: 	if
  164: 	    drop rdrop true EXIT
  165: 	then
  166:     then
  167:     r> loadline !
  168:     >in !
  169:     false ;
  170: 
  171: \ : save-input ( -- x1 .. xn n ) \ core-ext
  172: \   >in @
  173: \   loadfile @ ?dup
  174: \   IF    dup file-position throw sourceline# >tib @ 6
  175: \         #tib @ >tib +!
  176: \   ELSE  sourceline# blk @ linestart @ >tib @ 5 THEN
  177: \ ;
  178: 
  179: \ : restore-input ( x1 .. xn n -- flag ) \ core-ext
  180: \   swap >tib !
  181: \   6 = IF   loadline ! rot dup loadfile !
  182: \            reposition-file IF drop true EXIT THEN
  183: \       ELSE linestart ! blk !
  184: \            dup sourceline# <> IF 2drop true EXIT THEN
  185: \            loadline !
  186: \       THEN
  187: \   >in ! false ;
  188: 
  189: 
  190: 
  191: \ This things we don't need, but for being complete... jaw
  192: 
  193: \ EXPECT SPAN                                           17may93jaw
  194: 
  195: variable span ( -- a-addr ) \ core-ext
  196: \ obsolescent
  197: 
  198: : expect ( c-addr +len -- ) \ core-ext
  199:     \ obsolescent; use accept
  200:     0 rot over
  201:     BEGIN ( maxlen span c-addr pos1 )
  202: 	key decode ( maxlen span c-addr pos2 flag )
  203: 	>r 2over = r> or
  204:     UNTIL
  205:     type-rest drop
  206:     2drop nip span ! ;
  207: 

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