.\"***************************************************************************
-.\" Copyright 2018-2022,2023 Thomas E. Dickey *
+.\" Copyright 2018-2023,2024 Thomas E. Dickey *
.\" Copyright 1998-2010,2016 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: curs_clear.3x,v 1.41 2023/12/16 21:09:11 tom Exp $
-.TH curs_clear 3X 2023-12-16 "ncurses 6.4" "Library calls"
+.\" $Id: curs_clear.3x,v 1.50 2024/05/25 20:10:58 tom Exp $
+.TH curs_clear 3X 2024-05-25 "ncurses @NCURSES_MAJOR@.@NCURSES_MINOR@" "Library calls"
.ie \n(.g \{\
.ds `` \(lq
.ds '' \(rq
\fBint wclrtoeol(WINDOW *\fIwin\fP);
.fi
.SH DESCRIPTION
-.SS erase/werase
+.SS "erase, werase"
The \fBerase\fP and \fBwerase\fP routines copy blanks to every
position in the window, clearing the screen.
.PP
Blanks created by erasure have the current background rendition (as set
by \fBwbkgdset\fP(3X)) merged into them.
-.SS clear/wclear
+.SS "clear, wclear"
The \fBclear\fP and \fBwclear\fP routines are like \fBerase\fP and
\fBwerase\fP, but they also call \fBclearok\fP(3X), so that the screen is
cleared completely on the next call to \fBwrefresh\fP for that window
and repainted from scratch.
-.SS clrtobot/wclrtobot
+.SS "clrtobot, wclrtobot"
The \fBclrtobot\fP and \fBwclrtobot\fP routines erase from the cursor to the
end of screen.
That is, they erase all lines below the cursor in the window.
Also, the current line to the right of the cursor, inclusive, is erased.
-.SS clrtoeol/wclrtoeol
+.SS "clrtoeol, wclrtoeol"
The \fBclrtoeol\fP and \fBwclrtoeol\fP routines erase the current line
to the right of the cursor, inclusive, to the end of the current line.
.SH RETURN VALUE
X/Open defines no error conditions.
In this implementation,
.bP
-functions using a window pointer parameter return an error if it is null
+functions using a window pointer parameter return
+.B ERR
+if it is null
.bP
\fBwclrtoeol\fP returns an error
if the cursor position is about to wrap.
Note that \fBerase\fP, \fBwerase\fP, \fBclear\fP, \fBwclear\fP,
\fBclrtobot\fP, and \fBclrtoeol\fP may be macros.
.SH PORTABILITY
-These functions are described in the XSI Curses standard, Issue 4.
+These functions are described in X/Open Curses, Issue 4.
.PP
The SVr4.0 manual says that these functions could return
\*(``or a non-negative integer if \fB\%immedok\fP is set\*('',