1: \ environmental queries
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: \ wordlist constant environment-wordlist
22:
23: Create environment-wordlist wordlist drop
24:
25: : environment? ( c-addr u -- false / ... true )
26: environment-wordlist search-wordlist if
27: execute true
28: else
29: false
30: endif ;
31:
32: environment-wordlist set-current
33: get-order environment-wordlist swap 1+ set-order
34:
35: \ assumes that chars, cells and doubles use an integral number of aus
36:
37: \ this should be computed in C as CHAR_BITS/sizeof(char),
38: \ but I don't know any machine with gcc where an au does not have 8 bits.
39: 8 constant ADDRESS-UNIT-BITS ( -- n ) \ environment
40: 1 ADDRESS-UNIT-BITS chars lshift 1- constant MAX-CHAR
41: MAX-CHAR constant /COUNTED-STRING
42: ADDRESS-UNIT-BITS cells 2* 2 + constant /HOLD
43: &84 constant /PAD
44: true constant CORE
45: true constant CORE-EXT?
46: 1 -3 mod 0< constant FLOORED
47:
48: 1 ADDRESS-UNIT-BITS cells 1- lshift 1- constant MAX-N
49: -1 constant MAX-U
50:
51: -1 MAX-N 2constant MAX-D
52: -1. 2constant MAX-UD
53:
54: 0 1 2constant gforth \ minor major version
55:
56: \ !! RETURN-STACK-CELLS
57: \ !! STACK-CELLS
58: \ !! floating-stack
59: \ !! max-float
60: 15 constant #locals \ 1000 64 /
61: \ One local can take up to 64 bytes, the size of locals-buffer is 1000
62: maxvp constant wordlists
63:
64: forth definitions
65: previous
66:
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