xref: /freebsd/stand/forth/color.4th (revision bdcbfde31e8e9b343f113a1956384bdf30d1ed62)
1\ Copyright (c) 2011-2013 Devin Teske <dteske@FreeBSD.org>
2\ All rights reserved.
3\
4\ Redistribution and use in source and binary forms, with or without
5\ modification, are permitted provided that the following conditions
6\ are met:
7\ 1. Redistributions of source code must retain the above copyright
8\    notice, this list of conditions and the following disclaimer.
9\ 2. Redistributions in binary form must reproduce the above copyright
10\    notice, this list of conditions and the following disclaimer in the
11\    documentation and/or other materials provided with the distribution.
12\
13\ THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14\ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15\ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16\ ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17\ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18\ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19\ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20\ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21\ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22\ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23\ SUCH DAMAGE.
24\
25
26marker task-color.4th
27
28\ This function returns FALSE if the `loader_color' environment variable is set
29\ to NO, no, or 0. It returns TRUE if `loader_color' is set to any other value.
30\ If `loader_color' is unset, TRUE is returned.
31\
32: loader_color? ( -- t )
33
34	s" loader_color" getenv dup -1 <> if
35		\ `loader_color' is set.
36		\ Check if it is explicitly disabled.
37		2dup s" NO" compare-insensitive 0= if
38			2drop
39			FALSE exit
40		then
41		2dup s" 0" compare 0= if
42			2drop
43			FALSE exit
44		then
45		drop
46	then
47	drop
48	\ It is enabled.
49	TRUE
50;
51