--- gforth/environ.fs	1994/02/11 16:30:46	1.1
+++ gforth/environ.fs	1997/06/06 17:27:54	1.12
@@ -1,42 +1,75 @@
-\ ENVIRON.FS   Answer environmental queries            20may93jaw
+\ environmental queries
 
-\ May be cross-compiled
+\ Copyright (C) 1995 Free Software Foundation, Inc.
 
-decimal
+\ This file is part of Gforth.
 
-AVARIABLE EnvLink 0 EnvLink !
+\ Gforth is free software; you can redistribute it and/or
+\ modify it under the terms of the GNU General Public License
+\ as published by the Free Software Foundation; either version 2
+\ of the License, or (at your option) any later version.
 
-: (env)
-       EnvLink linked
-       dup c, here over chars allot swap move align
-       , ;
-
-: (2env)
-       EnvLink linked
-       dup $80 or
-       c, here over chars allot swap move align
-       , , ; 
-
-: env" ( n -- )
-       State @
-       IF   postpone S" postpone (env)
-       ELSE [char] " parse (env) THEN ; immediate
-
-: 2env" ( d -- )
-       State @
-       IF   postpone S" postpone (2env)
-       ELSE [char] " parse (2env) THEN ; immediate
-
-
-: environment?  EnvLink
-                BEGIN   @ dup
-                WHILE   dup cell+ count $1f and
-                        4 pick 4 pick compare 0=
-                        IF      nip nip cell+ count dup -rot
-                                $1f and + aligned
-                                swap $80 and IF 2@ ELSE @ THEN
-                                EXIT
-                        THEN
-                REPEAT
-                drop 2drop false ;
+\ This program is distributed in the hope that it will be useful,
+\ but WITHOUT ANY WARRANTY; without even the implied warranty of
+\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+\ GNU General Public License for more details.
+
+\ You should have received a copy of the GNU General Public License
+\ along with this program; if not, write to the Free Software
+\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+\ wordlist constant environment-wordlist
+
+Create environment-wordlist  wordlist drop
+
+: environment? ( c-addr u -- false / ... true ) \ core environment-query
+    environment-wordlist search-wordlist if
+	execute true
+    else
+	false
+    endif ;
+
+environment-wordlist set-current
+get-order environment-wordlist swap 1+ set-order
+
+\ assumes that chars, cells and doubles use an integral number of aus
+
+\ this should be computed in C as CHAR_BITS/sizeof(char),
+\ but I don't know any machine with gcc where an au does not have 8 bits.
+8 constant ADDRESS-UNIT-BITS ( -- n ) \ environment
+1 ADDRESS-UNIT-BITS chars lshift 1- constant MAX-CHAR
+MAX-CHAR constant /COUNTED-STRING
+ADDRESS-UNIT-BITS cells 2* 2 + constant /HOLD
+&84 constant /PAD
+true constant CORE
+true constant CORE-EXT
+1 -3 mod 0< constant FLOORED
+
+1 ADDRESS-UNIT-BITS cells 1- lshift 1- constant MAX-N
+-1 constant MAX-U
+
+-1 MAX-N 2constant MAX-D
+-1. 2constant MAX-UD
+
+version-string 2constant gforth \ version string (for versions>0.3.0)
+\ the version strings of the various versions are guaranteed to be
+\ sorted lexicographically
+
+: return-stack-cells ( -- n )
+    [ forthstart 6 cells + ] literal @ cell / ;
+
+: stack-cells ( -- n )
+    [ forthstart 4 cells + ] literal @ cell / ;
+
+: floating-stack ( -- n )
+    [ forthstart 5 cells + ] literal @
+    [IFDEF] float  float  [ELSE]  [ 1 floats ] Literal [THEN] / ;
+
+\ !! max-float
+15 constant #locals \ 1000 64 /
+    \ One local can take up to 64 bytes, the size of locals-buffer is 1000
+maxvp constant wordlists
+
+forth definitions
+previous