--- gforth/environ.fs	1994/07/27 13:37:01	1.2
+++ gforth/environ.fs	1998/12/08 22:02:39	1.17
@@ -1,14 +1,40 @@
 \ environmental queries
 
-wordlist constant environment-wordlist
+\ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
 
-: environment? ( c-addr u -- false / ... true )
+\ This file is part of Gforth.
+
+\ 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.
+
+\ 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 ;
 
+: e? name environment? 0= ABORT" environmental dependency not existing" ;
+
+: has? name environment? 0= IF false THEN ;
+
+: $has? environment? 0= IF false THEN ;
+
 environment-wordlist set-current
 get-order environment-wordlist swap 1+ set-order
 
@@ -16,13 +42,13 @@ get-order environment-wordlist swap 1+ s
 
 \ 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
+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
-\ CORE-EXT?
+true constant CORE-EXT
 1 -3 mod 0< constant FLOORED
 
 1 ADDRESS-UNIT-BITS cells 1- lshift 1- constant MAX-N
@@ -31,8 +57,24 @@ true constant CORE
 -1 MAX-N 2constant MAX-D
 -1. 2constant MAX-UD
 
-\ !! RETURN-STACK-CELLS
-\ !! STACK-CELLS
+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
 
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