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.\" $Id: curs_in_wchstr.3x,v 1.56 2025/10/21 00:03:06 tom Exp $
.TH curs_in_wchstr 3X 2025-10-20 "ncurses 6.6" "Library calls"
.ie \n(.g \{\
.ds `` \(lq
.ds '' \(rq
.\}
.el \{\
.ie t .ds `` ``
.el   .ds `` ""
.ie t .ds '' ''
.el   .ds '' ""
.\}
.
.de bP
.ie n  .IP \(bu 4
.el    .IP \(bu 2
..
.SH NAME
\fB\%in_wchstr\fP,
\fB\%in_wchnstr\fP,
\fB\%win_wchstr\fP,
\fB\%win_wchnstr\fP,
\fB\%mvin_wchstr\fP,
\fB\%mvin_wchnstr\fP,
\fB\%mvwin_wchstr\fP,
\fB\%mvwin_wchnstr\fP \-
get a \fIcurses\fR complex character string from a window
.SH SYNOPSIS
.nf
\fB#include <curses.h>
.PP
\fBint in_wchstr(cchar_t * \fIwchstr\fP);
\fBint win_wchstr(WINDOW * \fIwin\fP, cchar_t * \fIwchstr\fP);
\fBint mvin_wchstr(int \fIy\fP, int \fIx\fP, cchar_t * \fIwchstr\fP);
\fBint mvwin_wchstr(WINDOW * \fIwin\fP, int \fIy\fP, int \fIx\fP, cchar_t * \fIwchstr\fP);
.PP
\fBint in_wchnstr(cchar_t * \fIwchstr\fP, int \fIn\fP);
\fBint win_wchnstr(WINDOW * \fIwin\fP, cchar_t * \fIwchstr\fP, int \fIn\fP);
\fBint mvin_wchnstr(int \fIy\fP, int \fIx\fP, cchar_t * \fIwchstr\fP, int \fIn\fP);
\fBint mvwin_wchnstr(WINDOW * \fIwin\fP, int \fIy\fP, int \fIx\fP, cchar_t * \fIwchstr\fP, int \fIn\fP)
.fi
.SH DESCRIPTION
.B \%win_wchstr
extracts a
.I curses
complex character string from a
.I curses
window
.IR win ","
starting at the cursor and stopping at the end of the line,
and stores it in
.IR wchstr ","
terminating it with a wide null
.I curses
character.
.B \%win_wchnstr
does the same,
but copies at most
.I n
.I curses
complex characters from
.IR win "."
A negative
.I n
implies no limit;
.B \%win_wchnstr
then works like
.BR \%win_wchstr "."
\fB\%ncurses\fP(3X) describes the variants of these functions.
.SH RETURN VALUE
These functions return
.B OK
on success and
.B ERR
on failure.
.PP
In
.IR \%ncurses ","
these functions fail if
.bP
the
.I curses
screen has not been initialized,
.bP
(for functions taking a
.I \%WINDOW
pointer argument)
.I win
is a null pointer,
or
.bP
.I wchstr
is a null pointer.
.PP
Functions prefixed with \*(``mv\*('' first perform cursor movement and
fail if the position
.RI ( y ,
.IR x )
is outside the window boundaries.
.SH NOTES
All of these functions except
.B \%win_wchnstr
may be implemented as macros.
.PP
Reading a line that overflows the array pointed to by
.I wchstr
and its variants causes undefined results.
Instead,
use the
.IR n -infixed
functions with a positive
.I n
argument no larger than the size of the buffer backing
.IR wchstr "."
.SH PORTABILITY
X/Open Curses Issue\ 4 describes these functions.
It specifies no error conditions for them.
.SH HISTORY
X/Open Curses Issue\ 4 (1995) initially specified these functions.
The System\ V Interface Definition Version\ 4
of the same year
specified a function named
.I \%winwchstr
(and the usual variants).
.\" SVID 4, vol 3., p. 515
This was a later addition to
.RI SVr4. x ,
not appearing in the first SVr4 (1989).
It differed from X/Open's later
.I \%win_wchstr
in that it took an argument of type
.RI pointer-to- chtype
instead of
.RI pointer-to- cchar_t "."
.SH SEE ALSO
\fB\%curs_inchstr\fP(3X) describes comparable functions of the
.I \%ncurses
library in its non-wide-character configuration.
.PP
\fB\%curses\fP(3X),
\fB\%curs_inwstr\fP(3X),
\fB\%curs_in_wch\fP(3X)