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.\" Copyright 2018-2024,2025 Thomas E. Dickey                                *
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.\" Author: Thomas E. Dickey 1999-on
.\"
.\" $Id: curs_extend.3x,v 1.56 2025/04/05 22:01:03 tom Exp $
.TH curs_extend 3X 2025-04-05 "ncurses 6.5" "Library calls"
.ie \n(.g \{\
.ds `` \(lq
.ds '' \(rq
.\}
.el \{\
.ie t .ds `` ``
.el   .ds `` ""
.ie t .ds '' ''
.el   .ds '' ""
.\}
.SH NAME
\fB\%curses_version\fP,
\fB\%use_extended_names\fP \-
miscellaneous \fIcurses\fR extensions
.SH SYNOPSIS
.nf
\fB#include <curses.h>
.PP
\fBconst char * curses_version(void);
\fBint use_extended_names(bool \fIbf\fP);
.fi
.SH DESCRIPTION
These
.I \%ncurses
extensions to the
.I curses
library do not fit easily into other functional categories.
.SS curses_version
.B \%curses_version
returns a pointer to a string containing the library's name
and version number,
including its patch level,
for example
\*(``ncurses 6.5.20240720\*(''.
.SS use_extended_names
.B \%use_extended_names
configures whether the library recognizes
user-defined or nonstandard
.I \%term\%info
capability names that may be compiled into terminal type descriptions
via the \fB\%curs_terminfo\fP(3X) or \fB\%curs_termcap\fP(3X) interfaces.
Normally these names are available for use,
since the essential decision
is made through use of \fB\%tic\fP(1)'s
.B \-x
option to include such extensions in terminal type descriptions.
.B \%use_extended_names(FALSE)
prevents
.I \%ncurses
from recognizing these capabilities
to ensure compatibility with other implementations of
.IR curses .
.SH RETURN VALUE
.B \%curses_version
returns a constant string.
.PP
.B \%use_extended_names
returns the previous state of extended capability name recognition,
allowing you to save this property and restore it.
.SH NOTES
The pointer returned by
.B \%curses_version
corresponds to statically allocated memory;
do not attempt to \fIfree\fP(3) it.
.SH EXTENSIONS
These functions are
.I \%ncurses
extensions,
and are not found in SVr4
.IR curses ,
4.4BSD
.IR curses ,
or any other previous
.I curses
implementation.
.SH PORTABILITY
Applications employing
.I \%ncurses
extensions should condition their use on the visibility of the
.B \%NCURSES_VERSION
preprocessor macro.
.SH AUTHORS
Thomas Dickey
.SH SEE ALSO
.I \%ncurses
offers several other extensions to the X/Open Curses API.
.PP
\fB\%curs_getch\fP(3X),
\fB\%curs_inopts\fP(3X),
\fB\%curs_mouse\fP(3X),
\fB\%curs_print\fP(3X),
\fB\%curs_util\fP(3X),
\fB\%default_colors\fP(3X),
\fB\%define_key\fP(3X),
\fB\%keybound\fP(3X),
\fB\%keyok\fP(3X),
\fB\%new_pair\fP(3X),
\fB\%resizeterm\fP(3X),
\fB\%wresize\fP(3X)