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-<H1 class="no-header">curs_addch 3x</H1>
+<H1 class="no-header">curs_addch 3x 2023-10-07 ncurses 6.4 Library calls</H1>
<PRE>
-<STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>
<STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>
+<STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>
Library calls <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>
</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
+ <STRONG>addch</STRONG>, <STRONG>waddch</STRONG>, <STRONG>mvaddch</STRONG>, <STRONG>mvwaddch</STRONG>, <STRONG>echochar</STRONG>, <STRONG>wechochar</STRONG> - add a <EM>curses</EM>
+ character to a window and advance the cursor
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<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> At the bottom of the current scrolling region, and if <STRONG><A HREF="scrollok.3x.html">scrollok(3x)</A></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
+ <STRONG>o</STRONG> If <STRONG><A HREF="scrollok.3x.html">scrollok(3x)</A></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:
may be altered by setting the <STRONG>TABSIZE</STRONG> variable.
If <EM>ch</EM> is any other nonprintable character, it is drawn in printable
- form, i.e., the <STRONG>^</STRONG><EM>X</EM> notation used by <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG>. Calling <STRONG>winch</STRONG> after
- adding a nonprintable character does not return the character itself,
- but instead returns the printable representation of the character.
+ form, using the same convention as <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG>:
+
+ <STRONG>o</STRONG> Control characters are displayed in the <STRONG>^</STRONG><EM>X</EM> notation.
+
+ <STRONG>o</STRONG> Values above 128 are either meta characters (if the screen has not
+ been initialized, or if <STRONG><A HREF="curs_inopts.3x.html">meta(3x)</A></STRONG> has been called with a <STRONG>TRUE</STRONG> E
+ parameter), shown in the <STRONG>M-</STRONG><EM>X</EM> notation, or are displayed as
+ themselves. In the latter case, the values may not be printable;
+ this follows the X/Open specification.
+
+ Calling <STRONG>winch</STRONG> after adding a nonprintable character does not return the
+ character itself, but instead returns the printable representation of
+ the 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.
If it is not possible to add a complete character, an error is
returned:
- <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
+ <STRONG>o</STRONG> If <STRONG><A HREF="scrollok.3x.html">scrollok(3x)</A></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
<STRONG>o</STRONG> If an error is detected when converting a multibyte character to a
sequence of bytes, or if it is not possible to add all of the
</PRE><H3><a name="h3-ACS-Symbols">ACS Symbols</a></H3><PRE>
- X/Open Curses states that the <EM>ACS</EM><STRONG>_</STRONG> definitions are <STRONG>char</STRONG> constants. For
+ X/Open Curses states that the <STRONG>ACS_</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
+ analogous <STRONG>WACS_</STRONG> definitions which are <STRONG>cchar_t</STRONG> constants. Some
implementations are problematic:
<STRONG>o</STRONG> Some implementations define the ACS symbols to a constant (such as
NetBSD also uses an array, actually named <STRONG>_acs_char</STRONG>, with a <STRONG>#define</STRONG>
for compatibility.
- <STRONG>o</STRONG> HPUX curses equates some of the <EM>ACS</EM><STRONG>_</STRONG> symbols to the analogous <EM>WACS</EM><STRONG>_</STRONG>
- symbols as if the <EM>ACS</EM><STRONG>_</STRONG> symbols were wide characters. The
+ <STRONG>o</STRONG> HPUX curses equates some of the <STRONG>ACS_</STRONG> symbols to the analogous <STRONG>WACS_</STRONG>
+ symbols as if the <STRONG>ACS_</STRONG> symbols were wide characters. The
misdefined symbols are the arrows and other symbols which are not
used for line-drawing.
implementations use <STRONG>i</STRONG> (lowercase).
None of the terminal descriptions on Unix platforms use uppercase-
- I, except for Solaris (i.e., <EM>screen</EM>'s terminal description,
+ I, except for Solaris (i.e., <STRONG>screen</STRONG>'s terminal description,
apparently based on the X/Open documentation around 1995). On the
other hand, the terminal description <EM>gs6300</EM> (AT&T PC6300 with EMOTS
Terminal Emulator) uses lowercase-i.
second-hand list of their character descriptions has come to light.
The ACS-prefixed names for them were invented for <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>.
- The <EM>displayed</EM> values for the <EM>ACS</EM><STRONG>_</STRONG> and <EM>WACS</EM><STRONG>_</STRONG> constants depend on
+ The <EM>displayed</EM> values for the <STRONG>ACS_</STRONG> and <STRONG>WACS_</STRONG> constants depend on
<STRONG>o</STRONG> the library configuration, i.e., <STRONG>ncurses</STRONG> versus <STRONG>ncursesw</STRONG>, where the
latter is capable of displaying Unicode while the former is not,
</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>.
+ <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>
+
ncurses 6.4 2023-10-07 <STRONG><A HREF="curs_addch.3x.html">curs_addch(3x)</A></STRONG>
</PRE>
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