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facf0c92e0
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
110 lines
3.9 KiB
Plaintext
110 lines
3.9 KiB
Plaintext
.\"***************************************************************************
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.\" Copyright 2020-2023,2024 Thomas E. Dickey *
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.\" Copyright 2005-2016,2017 Free Software Foundation, Inc. *
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.\" *
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.\" Permission is hereby granted, free of charge, to any person obtaining a *
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.\" copy of this software and associated documentation files (the *
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.\" "Software"), to deal in the Software without restriction, including *
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.\" without limitation the rights to use, copy, modify, merge, publish, *
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.\" distribute, distribute with modifications, sublicense, and/or sell *
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.\" copies of the Software, and to permit persons to whom the Software is *
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.\" furnished to do so, subject to the following conditions: *
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.\" *
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.\" The above copyright notice and this permission notice shall be included *
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.\" in all copies or substantial portions of the Software. *
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.\" *
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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.\" *
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.\" Except as contained in this notice, the name(s) of the above copyright *
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.\" holders shall not be used in advertising or otherwise to promote the *
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.\" sale, use or other dealings in this Software without prior written *
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.\" authorization. *
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.\"***************************************************************************
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.\"
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.\" Author: Thomas E. Dickey
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.\"
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.\" $Id: legacy_coding.3x,v 1.32 2024/09/14 20:06:50 tom Exp $
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.TH legacy_coding 3X 2024-09-14 "ncurses @NCURSES_MAJOR@.@NCURSES_MINOR@" "Library calls"
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.SH NAME
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\fB\%use_legacy_coding\fP \-
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override \fIcurses\fR locale encoding checks
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.SH SYNOPSIS
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.nf
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\fB#include <curses.h>
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.PP
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\fBint use_legacy_coding(int \fIlevel\fP);
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.fi
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.SH DESCRIPTION
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.BR \%use_legacy_coding ","
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an
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.I \%ncurses
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extension to the
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.I curses
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library,
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permits customiztion of \fB\%unctrl\fP(3X) behavior,
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suppressing \fI\%isprint\fP(3)-based checks within the library that
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would normally cause nonprinting characters to be rendered in visible
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form.
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The alteration affects only byte-wide characters with the most
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significant bit set.
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.PP
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The
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.I level
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parameter controls the result.
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.RS
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.TP 5
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.B 0
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The library functions normally,
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rendering nonprinting characters as described in \fB\%unctrl\fP(3X),
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.TP
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.B 1
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the library ignores
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.I \%isprint
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for codes in the range 160-255.
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.TP
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.B 2
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the library ignores
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.I \%isprint
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for codes in the range 128-255.
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It also modifies the output of \fB\%unctrl\fP(3X),
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showing codes in the range 128-159 as is.
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.RE
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.SH RETURN VALUE
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If the
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.I curses
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screen has not been initialized,
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or the
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.I level
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parameter is out of range,
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.B \%use_legacy_coding
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returns
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.BR ERR .
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Otherwise,
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it returns the previous level.
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.SH EXTENSIONS
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.B \%use_legacy_coding
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is an
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.I \%ncurses
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extension.
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.SH PORTABILITY
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Applications employing
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.I \%ncurses
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extensions should condition their use on the visibility of the
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.B \%NCURSES_VERSION
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preprocessor macro.
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.SH HISTORY
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.I \%ncurses
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5.6 (2006) introduced
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.I \%use_legacy_coding
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to support \fI\%lynx\fP(1)'s font-switching feature.
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.SH AUTHORS
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Thomas Dickey
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.SH SEE ALSO
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\fB\%unctrl\fP(3X)
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