Annotation of gforth/environ.fs, revision 1.11
1.2 anton 1: \ environmental queries
1.1 anton 2:
1.8 anton 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:
1.3 pazsan 21: \ wordlist constant environment-wordlist
1.1 anton 22:
1.3 pazsan 23: Create environment-wordlist wordlist drop
24:
1.10 anton 25: : environment? ( c-addr u -- false / ... true ) \ core environment-query
1.2 anton 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.
1.7 anton 39: 8 constant ADDRESS-UNIT-BITS ( -- n ) \ environment
1.2 anton 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
1.9 anton 45: true constant CORE-EXT
1.2 anton 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
1.1 anton 50:
1.2 anton 51: -1 MAX-N 2constant MAX-D
52: -1. 2constant MAX-UD
1.3 pazsan 53:
1.5 anton 54: 0 1 2constant gforth \ minor major version
1.1 anton 55:
1.10 anton 56: : return-stack-cells ( -- n )
57: [ forthstart 6 cells + ] literal @ cell / ;
58:
59: : stack-cells ( -- n )
60: [ forthstart 4 cells + ] literal @ cell / ;
61:
62: : floating-stack ( -- n )
1.11 ! pazsan 63: [ forthstart 5 cells + ] literal @
! 64: [IFDEF] float float [ELSE] [ 1 floats ] Literal [THEN] / ;
1.10 anton 65:
1.5 anton 66: \ !! max-float
1.6 anton 67: 15 constant #locals \ 1000 64 /
68: \ One local can take up to 64 bytes, the size of locals-buffer is 1000
1.5 anton 69: maxvp constant wordlists
1.2 anton 70:
71: forth definitions
72: previous
1.1 anton 73:
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