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60 lines
3.2 KiB
C
60 lines
3.2 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/dce.h"
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#include "libc/log/internal.h"
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#include "libc/nt/version.h"
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#include "libc/runtime/runtime.h"
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#define IsDumb(s) \
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(s[0] == 'd' && s[1] == 'u' && s[2] == 'm' && s[3] == 'b' && !s[4])
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/**
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* Indicates if ANSI terminal colors are inappropriate.
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*
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* Normally this variable should be false. We only set it to true if
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* we're running on an old version of Windows or the environment
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* variable `TERM` is set to `dumb`.
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*
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* We think colors should be the norm, since most software is usually
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* too conservative about removing them. Rather than using `isatty`
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* consider using sed for instances where color must be removed:
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*
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* sed 's/\x1b\[[;[:digit:]]*m//g' <color.txt >uncolor.txt
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*
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* For some reason, important software is configured by default in many
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* operating systems, to not only disable colors, but utf-8 too! Here's
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* an example of how a wrapper script can fix that for `less`.
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*
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* #!/bin/sh
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* LESSCHARSET=UTF-8 exec /usr/bin/less -RS "$@"
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*
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* Thank you for using colors!
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*/
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bool __nocolor;
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optimizesize textstartup void __nocolor_init(int argc, char **argv, char **envp,
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intptr_t *auxv) {
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char *s;
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__nocolor = (IsWindows() && !IsAtLeastWindows10()) ||
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((s = getenv("TERM")) && IsDumb(s));
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}
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const void *const __nocolor_ctor[] initarray = {
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__nocolor_init,
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};
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