Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / SLOF / slof / fs / search.fs

diff --git a/qemu/roms/SLOF/slof/fs/search.fs b/qemu/roms/SLOF/slof/fs/search.fs
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+\ *****************************************************************************
+\ * Copyright (c) 2004, 2008 IBM Corporation
+\ * All rights reserved.
+\ * This program and the accompanying materials
+\ * are made available under the terms of the BSD License
+\ * which accompanies this distribution, and is available at
+\ * http://www.opensource.org/licenses/bsd-license.php
+\ *
+\ * Contributors:
+\ *     IBM Corporation - initial implementation
+\ ****************************************************************************/
+\
+\ Copyright 2002,2003,2004  Segher Boessenkool  <segher@kernel.crashing.org>
+\
+
+
+\ stuff we should already have:
+
+: linked ( var -- )  here over @ , swap ! ;
+
+HEX
+
+\ \ \
+\ \ \  Wordlists
+\ \ \
+
+VARIABLE wordlists  forth-wordlist wordlists !
+
+\ create a new wordlist
+: wordlist ( -- wid )  here wordlists linked 0 , ;
+
+
+\ \ \
+\ \ \  Search order
+\ \ \
+
+10 CONSTANT max-in-search-order        \ should define elsewhere
+\ CREATE search-order max-in-search-order cells allot  \ stack of wids \ is in engine now
+\ search-order VALUE context   \ top of stack  \ is in engine now
+
+: also ( -- )  clean-hash  context dup cell+ dup to context  >r @ r> ! ;
+: previous ( -- )  clean-hash  context cell- to context ;
+: only ( -- )  clean-hash  search-order to context  ( minimal-wordlist search-order ! ) ;
+: seal ( -- )  clean-hash  context @  search-order dup to context  ! ;
+
+: get-order ( -- wid_n .. wid_1 n )
+       context >r search-order BEGIN dup r@ u<= WHILE
+       dup @ swap cell+ REPEAT r> drop
+       search-order - cell / ;
+: set-order ( wid_n .. wid_1 n -- )    \ XXX: special cases for 0, -1
+       clean-hash  1- cells search-order + dup to context
+       BEGIN dup search-order u>= WHILE
+       dup >r ! r> cell- REPEAT drop ;
+
+
+\ \ \
+\ \ \  Compilation wordlist
+\ \ \
+
+: get-current ( -- wid )  current ;
+: set-current ( wid -- )  to current ;
+
+: definitions ( -- )  context @ set-current ;
+
+
+\ \ \
+\ \ \  Vocabularies
+\ \ \
+
+: VOCABULARY ( C: "name" -- ) ( -- )  CREATE wordlist drop  DOES> clean-hash  context ! ;
+\ : VOCABULARY ( C: "name" -- ) ( -- )  wordlist CREATE ,  DOES> @ context ! ;
+\ XXX we'd like to swap forth and forth-wordlist around (for .voc 's sake)
+: FORTH ( -- )  clean-hash  forth-wordlist context ! ;
+
+: .voc ( wid -- ) \ display name for wid \ needs work ( body> or something like that )
+       dup cell- @ ['] vocabulary ['] forth within IF
+       2 cells - >name name>string type ELSE u. THEN  space ;
+: vocs ( -- ) \ display all wordlist names
+       cr wordlists BEGIN @ dup WHILE dup .voc REPEAT drop ;
+: order ( -- )
+       cr ." context:  " get-order 0 ?DO .voc LOOP
+       cr ." current:  " get-current .voc ;
+
+
+
+
+\ some handy helper
+: voc-find ( wid -- 0 | link )
+   clean-hash  cell+ @ (find)  clean-hash ;