.\" $OpenBSD: curs_addstr.3,v 1.8 2023/10/17 09:52:08 nicm Exp $
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.\" Copyright 2019-2022,2023 Thomas E. Dickey                                *
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.\" $Id: curs_addstr.3,v 1.8 2023/10/17 09:52:08 nicm Exp $
.TH curs_addstr 3 2023-03-11 "ncurses 6.4" "Library calls"
.ie \n(.g .ds `` \(lq
.el       .ds `` ``
.ie \n(.g .ds '' \(rq
.el       .ds '' ''
.de bP
.ie n  .IP \(bu 4
.el    .IP \(bu 2
..
.na
.hy 0
.SH NAME
\fBaddstr\fP,
\fBaddnstr\fP,
\fBwaddstr\fP,
\fBwaddnstr\fP,
\fBmvaddstr\fP,
\fBmvaddnstr\fP,
\fBmvwaddstr\fP,
\fBmvwaddnstr\fP \- add a string of characters to a \fBcurses\fP window and advance cursor
.ad
.hy
.SH SYNOPSIS
.nf
\fB#include <curses.h>\fP
.PP
\fBint addstr(const char *\fIstr\fB);\fR
.br
\fBint addnstr(const char *\fIstr\fB, int \fIn\fB);\fR
.br
\fBint waddstr(WINDOW *\fIwin\fB, const char *\fIstr\fB);\fR
.br
\fBint waddnstr(WINDOW *\fIwin\fB, const char *\fIstr\fB, int \fIn\fB);\fR
.sp
\fBint mvaddstr(int \fIy\fB, int \fIx\fB, const char *\fIstr\fB);\fR
.br
\fBint mvaddnstr(int \fIy\fB, int \fIx\fB, const char *\fIstr\fB, int \fIn\fB);\fR
.br
\fBint mvwaddstr(WINDOW *\fIwin\fB, int \fIy\fB, int \fIx\fB, const char *\fIstr\fB);\fR
.br
\fBint mvwaddnstr(WINDOW *\fIwin\fB, int \fIy\fB, int \fIx\fB, const char *\fIstr, int \fIn\fB);\fR
.fi
.SH DESCRIPTION
These functions write the (null-terminated) character string
\fIstr\fP on the given window.
It is similar to calling \fBwaddch\fP once for each byte in the string.
.PP
The \fImv\fP functions perform cursor movement once, before writing any
characters.
Thereafter, the cursor is advanced as a side-effect of writing to the window.
.PP
The four functions with \fIn\fP as the last argument
write at most \fIn\fP bytes,
or until a terminating null is reached.
If \fIn\fP is \-1, then the entire string will be added.
.SH RETURN VALUE
All functions return the integer \fBERR\fP upon failure and \fBOK\fP on success.
.PP
X/Open does not define any error conditions.
This implementation returns an error
.bP
if the window pointer is null or
.bP
if the string pointer is null or
.bP
if the corresponding calls to \fBwaddch\fP return an error.
.PP
Functions with a \*(``mv\*('' prefix first perform a cursor movement using
\fBwmove\fP, and return an error if the position is outside the window,
or if the window pointer is null.
If an error is returned by the \fBwmove\fP,
no characters are added to the window.
.PP
If an error is returned by \fBwaddch\fP
(e.g.,
because the window is not large enough,
or an illegal byte sequence was detected)
only part of the string may be added.
Aside from that,
there is a special case in \fBwaddch\fP where an error may be
returned after successfully writing a character to the lower-right corner
of a window when \fBscrollok\fP(3) is disabled.
.SH NOTES
All of these functions except \fBwaddnstr\fP may be macros.
.SH PORTABILITY
These functions are described in the XSI Curses standard, Issue 4.
.SH SEE ALSO
\fBcurses\fP(3),
\fBcurs_addch\fP(3).