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-<H1>curs_addch 3x</H1>
-<HR>
+<H1 class="no-header">curs_addch 3x</H1>
<PRE>
-<!-- Manpage converted by man2html 3.0.1 -->
<STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG> <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>
-</PRE>
-<H2>NAME</H2><PRE>
+</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>addch</STRONG>, <STRONG>waddch</STRONG>, <STRONG>mvaddch</STRONG>, <STRONG>mvwaddch</STRONG>, <STRONG>echochar</STRONG>, <STRONG>wechochar</STRONG> -
add a character (with attributes) to a <STRONG>curses</STRONG> window, then
advance the cursor
-</PRE>
-<H2>SYNOPSIS</H2><PRE>
+</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>int</STRONG> <STRONG>addch(const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
<STRONG>int</STRONG> <STRONG>wechochar(WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>const</STRONG> <STRONG>chtype</STRONG> <STRONG>ch);</STRONG>
-</PRE>
-<H2>DESCRIPTION</H2><PRE>
+</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
+
+</PRE><H3><a name="h3-Adding-characters">Adding characters</a></H3><PRE>
The <STRONG>addch</STRONG>, <STRONG>waddch</STRONG>, <STRONG>mvaddch</STRONG> and <STRONG>mvwaddch</STRONG> routines put the
character <EM>ch</EM> into the given window at its current window
position, which is then advanced. They are analogous to
- <STRONG>putchar</STRONG> in <STRONG><A HREF="stdio.3.html">stdio(3)</A></STRONG>. If the advance is at the right mar-
- gin, the cursor automatically wraps to the beginning of
- the next line. At the bottom of the current scrolling
- region, if <STRONG>scrollok</STRONG> is enabled, the scrolling region is
- scrolled up one line.
-
- If <EM>ch</EM> is a tab, newline, or backspace, the cursor is moved
- appropriately within the window. Backspace moves the cur-
- sor one character left; at the left edge of a window it
- does nothing. Newline does a <STRONG>clrtoeol</STRONG>, then moves the
- cursor to the window left margin on the next line,
- scrolling the window if on the last line. Tabs are con-
- sidered to be at every eighth column. The tab interval
- may be altered by setting the <STRONG>TABSIZE</STRONG> variable.
-
- If <EM>ch</EM> is any control character other than tab, newline, or
- backspace, it is drawn in <STRONG>^</STRONG><EM>X</EM> notation. Calling <STRONG>winch</STRONG>
- after adding a control character does not return the char-
- acter itself, but instead returns the ^-representation of
- the control character.
+ <STRONG>putchar</STRONG> in <STRONG>stdio(3)</STRONG>. If the advance is at the right mar-
+ gin:
+
+ <STRONG>o</STRONG> The cursor automatically wraps to the beginning of the
+ next line.
+
+ <STRONG>o</STRONG> At the bottom of the current scrolling region, and if
+ <STRONG>scrollok</STRONG> is enabled, the scrolling region is scrolled
+ up one line.
+
+ <STRONG>o</STRONG> If <STRONG>scrollok</STRONG> is not enabled, writing a character at the
+ lower right margin succeeds. However, an error is
+ returned because it is not possible to wrap to a new
+ line
+
+ If <EM>ch</EM> is a tab, newline, carriage return or backspace, the
+ cursor is moved appropriately within the window:
+
+ <STRONG>o</STRONG> Backspace moves the cursor one character left; at the
+ left edge of a window it does nothing.
+
+ <STRONG>o</STRONG> Carriage return moves the cursor to the window left
+ margin on the current line.
+
+ <STRONG>o</STRONG> Newline does a <STRONG>clrtoeol</STRONG>, then moves the cursor to the
+ window left margin on the next line, scrolling the
+ window if on the last line.
+
+ <STRONG>o</STRONG> Tabs are considered to be at every eighth column. The
+ tab interval may be altered by setting the <STRONG>TABSIZE</STRONG>
+ variable.
+
+ If <EM>ch</EM> is any other control character, it is drawn in <STRONG>^</STRONG><EM>X</EM>
+ notation. Calling <STRONG>winch</STRONG> after adding a control character
+ does not return the character itself, but instead returns
+ the ^-representation of the control character.
Video attributes can be combined with a character argument
passed to <STRONG>addch</STRONG> or related functions by logical-ORing them
into the character. (Thus, text, including attributes,
- can be copied from one place to another using <STRONG>inch</STRONG> and
+ can be copied from one place to another using <STRONG><A HREF="curs_inch.3x.html">inch(3x)</A></STRONG> and
<STRONG>addch</STRONG>.) See the <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG> page for values of prede-
fined video attribute constants that can be usefully OR'ed
into characters.
+
+</PRE><H3><a name="h3-Echoing-characters">Echoing characters</a></H3><PRE>
The <STRONG>echochar</STRONG> and <STRONG>wechochar</STRONG> routines are equivalent to a
- call to <STRONG>addch</STRONG> followed by a call to <STRONG>refresh</STRONG>, or a call to
- <STRONG>waddch</STRONG> followed by a call to <STRONG>wrefresh</STRONG>. The knowledge that
- only a single character is being output is used and, for
- non-control characters, a considerable performance gain
- may be seen by using these routines instead of their
+ call to <STRONG>addch</STRONG> followed by a call to <STRONG><A HREF="curs_refresh.3x.html">refresh(3x)</A></STRONG>, or a call
+ to <STRONG>waddch</STRONG> followed by a call to <STRONG>wrefresh</STRONG>. The knowledge
+ that only a single character is being output is used and,
+ for non-control characters, a considerable performance
+ gain may be seen by using these routines instead of their
equivalents.
- <STRONG>Line</STRONG> <STRONG>Graphics</STRONG>
+
+</PRE><H3><a name="h3-Line-Graphics">Line Graphics</a></H3><PRE>
The following variables may be used to add line drawing
characters to the screen with routines of the <STRONG>addch</STRONG> fam-
ily. The default character listed below is used if the
<STRONG>acsc</STRONG> capability does not define a terminal-specific
- replacement for it. The names are taken from VT100 nomen-
- clature.
+ replacement for it, or if the terminal and locale configu-
+ ration requires Unicode but the library is unable to use
+ Unicode.
+
+ The names are taken from VT100 nomenclature.
<EM>Name</EM> <EM>Default</EM> <EM>Description</EM>
--------------------------------------------------
ACS_VLINE | vertical line
-</PRE>
-<H2>RETURN VALUE</H2><PRE>
+</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
All routines return the integer <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> on
- success (the SVr4 manuals specify only "an integer value
+ success (the SVr4 manuals specify only "an integer value
other than <STRONG>ERR</STRONG>") upon successful completion, unless other-
wise noted in the preceding routine descriptions.
+ Functions with a "mv" prefix first perform a cursor move-
+ ment using <STRONG>wmove</STRONG>, and return an error if the position is
+ outside the window, or if the window pointer is null.
-</PRE>
- Note that <STRONG>addch</STRONG>, <STRONG>mvaddch</STRONG>, <STRONG>mvwaddch</STRONG>, and <STRONG>echochar</STRONG> may be
+
+<
/PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
+ Note that <STRONG>addch</STRONG>, <STRONG>mvaddch</STRONG>, <STRONG>mvwaddch</STRONG>, and <STRONG>echochar</STRONG> may be
macros.
-</PRE>
-<H2>PORTABILITY</H2><PRE>
- All these functions are described in the XSI Curses stan-
- dard, Issue 4. The defaults specified for forms-drawing
+</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
+ All these functions are described in the XSI Curses stan-
+ dard, Issue 4. The defaults specified for forms-drawing
characters apply in the POSIX locale.
+ X/Open Curses states that the <EM>ACS</EM><STRONG>_</STRONG> definitions are <STRONG>char</STRONG>
+ constants. For the wide-character implementation (see
+ <STRONG>curs_add_wch</STRONG>), there are analogous <EM>WACS</EM><STRONG>_</STRONG> definitions which
+ are <STRONG>cchar_t</STRONG> constants.
+
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
The ACS-prefixed names for them were invented for
<STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>.
- The <STRONG>TABSIZE</STRONG> variable is implemented in some versions of
+ The <EM>displayed</EM> values for the <EM>ACS</EM><STRONG>_</STRONG> and <EM>WACS</EM><STRONG>_</STRONG> constants
+ depend on
+
+ <STRONG>o</STRONG> the library configuration, i.e., <STRONG>ncurses</STRONG> versus <STRONG>ncurs-</STRONG>
+ <STRONG>esw</STRONG>, where the latter is capable of displaying Unicode
+ while the former is not, and
+
+ <STRONG>o</STRONG> whether the <EM>locale</EM> uses UTF-8 encoding.
+
+ In certain cases, the terminal is unable to display line-
+ drawing characters except by using UTF-8 (see the discus-
+ sion of <STRONG>NCURSES_NO_UTF8_ACS</STRONG> in <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>).
+
+ The <STRONG>TABSIZE</STRONG> variable is implemented in some versions of
curses, but is not part of X/Open curses.
- If <EM>ch</EM> is a carriage return, the cursor is moved to the
- beginning of the current row of the window. This is true
+ If <EM>ch</EM> 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.
-</PRE>
-<H2>SEE ALSO</H2><PRE>
- <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>, <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>, <STRONG><A HREF="curs_inch.3x.html">curs_inch(3x)</A></STRONG>,
- <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>, <STRONG><A HREF="putc.3.html">putc(3)</A></STRONG>.
+</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
+ <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_attr.3x.html">curs_attr(3x)</A></STRONG>, <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>, <STRONG><A HREF="curs_inch.3x.html">curs_inch(3x)</A></STRONG>,
+ <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>, <STRONG><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>,
+ <STRONG>putc(3)</STRONG>.
Comparable functions in the wide-character (ncursesw)
library are described in <STRONG><A HREF="curs_add_wch.3x.html">curs_add_wch(3x)</A></STRONG>.
<STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>
</PRE>
-<HR>
-<ADDRESS>
-Man(1) output converted with
-<a href="http://www.oac.uci.edu/indiv/ehood/man2html.html">man2html</a>
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+<div class="nav">
+<ul>
+<li><a href="#h2-NAME">NAME</a></li>
+<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
+<li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
+<ul>
+<li><a href="#h3-Adding-characters">Adding characters</a></li>
+<li><a href="#h3-Echoing-characters">Echoing characters</a></li>
+<li><a href="#h3-Line-Graphics">Line Graphics</a></li>
+</ul>
+</li>
+<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
+<li><a href="#h2-NOTES">NOTES</a></li>
+<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
+<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
+</ul>
+</div>
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