1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
.\"***************************************************************************
.\" Copyright 2018-2024,2025 Thomas E. Dickey *
.\" Copyright 1998-2006,2010 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" "Software"), to deal in the Software without restriction, including *
.\" without limitation the rights to use, copy, modify, merge, publish, *
.\" distribute, distribute with modifications, sublicense, and/or sell *
.\" copies of the Software, and to permit persons to whom the Software is *
.\" furnished to do so, subject to the following conditions: *
.\" *
.\" The above copyright notice and this permission notice shall be included *
.\" in all copies or substantial portions of the Software. *
.\" *
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
.\" *
.\" Except as contained in this notice, the name(s) of the above copyright *
.\" holders shall not be used in advertising or otherwise to promote the *
.\" sale, use or other dealings in this Software without prior written *
.\" authorization. *
.\"***************************************************************************
.\"
.\" $Id: curs_delch.3x,v 1.49 2025/04/05 21:59:53 tom Exp $
.TH curs_delch 3X 2025-04-05 "ncurses @NCURSES_MAJOR@.@NCURSES_MINOR@" "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\%delch\fP,
\fB\%wdelch\fP,
\fB\%mvdelch\fP,
\fB\%mvwdelch\fP \-
delete a character from a \fIcurses\fR window
.SH SYNOPSIS
.nf
\fB#include <curses.h>
.PP
\fBint delch(void);
\fBint wdelch(WINDOW * \fIwin\fP);
\fBint mvdelch(int \fIy\fP, int \fIx\fP);
\fBint mvwdelch(WINDOW * \fIwin\fP, int \fIy\fP, int \fIx\fP);
.fi
.SH DESCRIPTION
.B \%wdelch
deletes the character at the cursor position in
.IR win .
It moves all characters to the right of the cursor on the same line to
the left one position and replaces the contents of the rightmost
position on the line with the window's background character;
see \fB\%bkgd\fP(3X)
(wide-character API users: \fB\%bkgrnd\fP(3X)).
The cursor position does not change
(after moving to
.RI ( y ,
.IR x ),
if specified).
\fB\%ncurses\fP(3X) describes the variants of this function.
.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,
or
.bP
(for functions taking a
.I \%WINDOW
pointer argument)
.I win
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
.BR \%delch ,
.BR \%mvdelch ,
and
.B \%mvwdelch
may be implemented as macros.
.PP
A terminal's
.B \%delete_character
.RB ( dch1 )
capability
is not necessarily employed.
.SH PORTABILITY
X/Open Curses Issue\ 4 describes these functions.
It specifies no error conditions for them.
.PP
SVr4 describes a successful return value only as
\*(``an integer value other than
.IR ERR \*(''. \" Courier roman in source; SVID 4, vol. 3, p. 489
.SH HISTORY
SVr2 (1984) introduced
.IR \%wdelch "."
.SH SEE ALSO
\fB\%curses\fP(3X)
|
