'\" t
-.\" $Id: curs_addch.3x,v 1.10 1997/12/13 22:37:23 tom Exp $
+.\"***************************************************************************
+.\" Copyright (c) 1998-2007,2010 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_addch.3x,v 1.29 2010/08/14 23:29:16 tom Exp $
.TH curs_addch 3X ""
.SH NAME
-\fBaddch\fR, \fBwaddch\fR, \fBmvaddch\fR, \fBmvwaddch\fR,
-\fBechochar\fR, \fBwechochar\fR - add a character (with attributes) to a
-\fBcurses\fR window, then advance the cursor
+\fBaddch\fR,
+\fBwaddch\fR,
+\fBmvaddch\fR,
+\fBmvwaddch\fR,
+\fBechochar\fR,
+\fBwechochar\fR \- add a character (with attributes) to a \fBcurses\fR window, then advance the cursor
.SH SYNOPSIS
\fB#include <curses.h>\fR
-
-\fBint addch(chtype ch);\fR
+.PP
+\fBint addch(const chtype ch);\fR
.br
-\fBint waddch(WINDOW *win, chtype ch);\fR
+\fBint waddch(WINDOW *win, const chtype ch);\fR
.br
-\fBint mvaddch(int y, int x, chtype ch);\fR
+\fBint mvaddch(int y, int x, const chtype ch);\fR
.br
-\fBint mvwaddch(WINDOW *win, int y, int x, chtype ch);\fR
+\fBint mvwaddch(WINDOW *win, int y, int x, const chtype ch);\fR
.br
-\fBint echochar(chtype ch);\fR
+\fBint echochar(const chtype ch);\fR
.br
-\fBint wechochar(WINDOW *win, chtype ch);\fR
+\fBint wechochar(WINDOW *win, const chtype ch);\fR
.br
.SH DESCRIPTION
The \fBaddch\fR, \fBwaddch\fR, \fBmvaddch\fR and \fBmvwaddch\fR routines put
If the advance is at the right margin, the cursor automatically wraps to the
beginning of the next line. At the bottom of the current scrolling region, if
\fBscrollok\fR is enabled, the scrolling region is scrolled up one line.
-
-If \fIch\fR is a tab, newline, or backspace, the cursor is moved appropriately
-within the window. Backspace moves the cursor one character left; at the left
-edge of a window it does nothing. Newline does a \fBclrtoeol\fR, then moves
-the cursor to the window left margin on the next line, scrolling the window if
-on the last line). Tabs are considered to be at every eighth column.
-
+.PP
+If \fIch\fR is a tab, newline, or backspace,
+the cursor is moved appropriately within the window.
+Backspace moves the cursor one character left; at the left
+edge of a window it does nothing.
+Newline does a \fBclrtoeol\fR,
+then moves the cursor to the window left margin on the next line,
+scrolling the window if on the last line.
+Tabs are considered to be at every eighth column.
+The tab interval may be altered by setting the \fBTABSIZE\fR variable.
+.PP
If \fIch\fR is any control character other than tab, newline, or backspace, it
is drawn in \fB^\fR\fIX\fR notation. Calling \fBwinch\fR after adding a
control character does not return the character itself, but instead returns
-the ^-representation of the control character. (To emit control characters
-literally, use \fBechochar\fR.)
-
+the ^-representation of the control character.
+.PP
Video attributes can be combined with a character argument passed to
\fBaddch\fR or related functions by logical-ORing them into the character.
(Thus, text, including attributes, can be copied from one place to another
-using \fBinch\fR and \fBaddch\fR.). See the \fBcurs_attr\fR(3X) page for
+using \fBinch\fR and \fBaddch\fR.) See the \fBcurs_attr\fR(3X) page for
values of predefined video attribute constants that can be usefully OR'ed
into characters.
-
+.PP
The \fBechochar\fR and \fBwechochar\fR routines are equivalent to a call to
\fBaddch\fR followed by a call to \fBrefresh\fR, or a call to \fBwaddch\fR
followed by a call to \fBwrefresh\fR. The knowledge that only a single
.SS Line Graphics
The following variables may be used to add line drawing characters to the
screen with routines of the \fBaddch\fR family. The default character listed
-below is used if the \fBacsc\fR capability doesn't define a terminal-specific
-replacement for it (but see the EXTENSIONS section below). The names are
-taken from VT100 nomenclature.
-
+below is used if the \fBacsc\fR capability does not define a terminal-specific
+replacement for it.
+The names are taken from VT100 nomenclature.
+.PP
.TS
l l l
_ _ _
l l l.
\fIName\fR \fIDefault\fR \fIDescription\fR
-ACS_ULCORNER + upper left-hand corner
-ACS_LLCORNER + lower left-hand corner
-ACS_URCORNER + upper right-hand corner
-ACS_LRCORNER + lower right-hand corner
-ACS_RTEE + right tee
-ACS_LTEE + left tee
+ACS_BLOCK # solid square block
+ACS_BOARD # board of squares
ACS_BTEE + bottom tee
-ACS_TTEE + top tee
-ACS_HLINE - horizontal line
-ACS_VLINE | vertical line
-ACS_PLUS + plus
-ACS_S1 - scan line 1
-ACS_S9 \&_ scan line 9
-ACS_DIAMOND + diamond
-ACS_CKBOARD : checker board (stipple)
-ACS_DEGREE ' degree symbol
-ACS_PLMINUS # plus/minus
ACS_BULLET o bullet
-ACS_LARROW < arrow pointing left
-ACS_RARROW > arrow pointing right
+ACS_CKBOARD : checker board (stipple)
ACS_DARROW v arrow pointing down
-ACS_UARROW ^ arrow pointing up
-ACS_BOARD # board of squares
+ACS_DEGREE ' degree symbol
+ACS_DIAMOND + diamond
+ACS_GEQUAL > greater-than-or-equal-to
+ACS_HLINE \- horizontal line
ACS_LANTERN # lantern symbol
-ACS_BLOCK # solid square block
-ACS_S3 - scan line 3
-ACS_S7 - scan line 7
+ACS_LARROW < arrow pointing left
ACS_LEQUAL < less-than-or-equal-to
-ACS_GEQUAL > greater-than-or-equal-to
-ACS_PI * greek pi
+ACS_LLCORNER + lower left-hand corner
+ACS_LRCORNER + lower right-hand corner
+ACS_LTEE + left tee
ACS_NEQUAL ! not-equal
+ACS_PI * greek pi
+ACS_PLMINUS # plus/minus
+ACS_PLUS + plus
+ACS_RARROW > arrow pointing right
+ACS_RTEE + right tee
+ACS_S1 \- scan line 1
+ACS_S3 \- scan line 3
+ACS_S7 \- scan line 7
+ACS_S9 \&_ scan line 9
ACS_STERLING f pound-sterling symbol
+ACS_TTEE + top tee
+ACS_UARROW ^ arrow pointing up
+ACS_ULCORNER + upper left-hand corner
+ACS_URCORNER + upper right-hand corner
+ACS_VLINE | vertical line
.TE
-
.SH RETURN VALUE
All routines return the integer \fBERR\fR upon failure and \fBOK\fR on success
(the SVr4 manuals specify only "an integer value other than \fBERR\fR") upon
successful completion, unless otherwise noted in the preceding routine
descriptions.
+.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.
.SH NOTES
Note that \fBaddch\fR, \fBmvaddch\fR, \fBmvwaddch\fR, and
\fBechochar\fR may be macros.
-.SH EXTENSIONS
-The following extended \fBcurses\fR features are available only on PC-clone
-consoles and compatible terminals obeying the ANSI.SYS de-facto standard for
-terminal control sequences. They are not part of XSI curses.
-
-The attribute A_ALTCHARSET actually forces literal display of PC ROM characters
-including the high-half graphics. Your console driver may still capture or
-translate a few (such as ESC) but this feature should give you access to the
-card-suit characters, up and down-arrow, and most others in the range 0-32.
-(In a terminfo entry designed for use with \fBncurses\fR, the high-half
-characters are obtained using this attribute with an \fBacsc\fR string in
-which the second of each pair is a high-half character.)
-
-Giving \fBwechochar\fR an argument with its high bit set will produce the
-corresponding high-half ASCII graphic (SVr4 curses also has this feature but
-does not document it). A control-character argument, however, will not
-typically produce the corresponding graphic; characters such as CR, NL, FF and
-TAB are typically interpreted by the console driver itself, and ESC will be
-interpreted as the leader of a control sequence.
.SH PORTABILITY
All these functions are described in the XSI Curses standard, Issue 4.
The defaults specified for forms-drawing characters apply in the POSIX locale.
-
-The seven ACS symbols starting with \fBACS_S3\fR were not documented in
+.LP
+Some ACS symbols
+(ACS_S3,
+ACS_S7,
+ACS_LEQUAL,
+ACS_GEQUAL,
+ACS_PI,
+ACS_NEQUAL,
+ACS_STERLING)
+were not documented in
any publicly released System V. However, many publicly available terminfos
-include \fBacsc\fR strings in which their key characters (pryz{|}) are
+include \fBacsc\fR strings in which their key characters (pryz{|}) are
embedded, and a second-hand list of their character descriptions has come
to light. The ACS-prefixed names for them were invented for \fBncurses\fR(3X).
+.LP
+The \fBTABSIZE\fR variable is implemented in some versions of curses,
+but is not part of X/Open curses.
+.LP
+If \fIch\fR is a carriage return,
+the cursor is moved to the beginning of the current row of the window.
+This is true of other implementations, but is not documented.
.SH SEE ALSO
-\fBcurses\fR(3X), \fBcurs_attr\fR(3X), \fBcurs_clear\fR(3X),
-\fBcurs_inch\fR(3X), \fBcurs_outopts\fR(3X), \fBcurs_refresh\fR(3X),
-\fBputc\fR(3S).
+\fBcurses\fR(3X),
+\fBcurs_attr\fR(3X),
+\fBcurs_clear\fR(3X),
+\fBcurs_inch\fR(3X),
+\fBcurs_outopts\fR(3X),
+\fBcurs_refresh\fR(3X),
+\fBputc\fR(3).
+.PP
+Comparable functions in the wide-character (ncursesw) library are
+described in
+\fBcurs_add_wch\fR(3X).
.\"#
.\"# The following sets edit modes for GNU EMACS
.\"# Local Variables:
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