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- * @Id: legacy_coding.3x,v 1.5 2016/10/15 17:02:31 tom Exp @
+ * @Id: legacy_coding.3x,v 1.28 2024/04/20 19:13:50 tom Exp @
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-<H1 class="no-header">legacy_coding 3x</H1>
+<H1 class="no-header">legacy_coding 3x 2024-04-20 ncurses 6.4 Library calls</H1>
<PRE>
-<STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG> <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>
+<STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG> Library calls <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
- <STRONG>use_legacy_coding</STRONG> - use terminal's default colors
+ <STRONG>use_legacy_coding</STRONG> - override <EM>curses</EM> locale encoding checks
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
- <STRONG>int</STRONG> <STRONG>use_legacy_coding(int</STRONG> <STRONG>level);</STRONG>
+ <STRONG>int</STRONG> <STRONG>use_legacy_coding(int</STRONG> <EM>level</EM><STRONG>);</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
- The <STRONG>use_legacy_coding</STRONG> function is an extension to the
- curses library. It allows the caller to change the result
- of <STRONG>unctrl</STRONG>, and suppress related checks within the library
- that would normally cause nonprinting characters to be
- rendered in visible form. This affects only 8-bit charac-
- ters.
+ <STRONG>use_legacy_coding</STRONG> is an extension to the <EM>curses</EM> library. It allows the
+ caller to change the result of <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG>, suppressing <STRONG>isprint(3)</STRONG>-based
+ checks within the library that would normally cause nonprinting
+ characters to be rendered in visible form. The alteration affects only
+ eight-bit characters.
- The <EM>level</EM> parameter controls the result:
+ The <EM>level</EM> parameter controls the result.
- 0 the library functions normally, rendering non-
- printing characters as described in <STRONG>unctrl</STRONG>.
+ <STRONG>0</STRONG> The library functions normally, rendering nonprinting
+ characters as described in <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG>,
- 1 the library ignores <STRONG>isprintf</STRONG> for codes in the
- range 160-255.
+ <STRONG>1</STRONG> the library ignores <EM>isprint</EM> for codes in the range 160-255.
- 2 the library ignores <STRONG>isprintf</STRONG> for codes in the
- range 128-255. It also modifies the output of
- <STRONG>unctrl</STRONG>, showing codes in the range 128-159 as
- is.
+ <STRONG>2</STRONG> the library ignores <EM>isprint</EM> for codes in the range 128-255.
+ It also modifies the output of <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG>, showing codes in
+ the range 128-159 as is.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
- If the screen has not been initialized, or the <EM>level</EM>
- parameter is out of range, the function returns <STRONG>ERR</STRONG>. Oth-
- erwise, it returns the previous level: <STRONG>0</STRONG>, <STRONG>1</STRONG> or <STRONG>2</STRONG>.
+ If the screen has not been initialized, or the <EM>level</EM> parameter is out
+ of range, <STRONG>use_legacy_coding</STRONG> returns <STRONG>ERR</STRONG>. Otherwise, it returns the
+ previous level: <STRONG>0</STRONG>, <STRONG>1</STRONG>, or <STRONG>2</STRONG>.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
- This routine is specific to ncurses. It was not supported
- on Version 7, BSD or System V implementations. It is rec-
- ommended that any code depending on ncurses extensions be
- conditioned using NCURSES_VERSION.
+ <STRONG>use_legacy_coding</STRONG> is specific to <EM>ncurses</EM>. It was not supported on
+ Version 7, BSD or System V implementations. Applications employing
+ <EM>ncurses</EM> extensions should condition their use on the visibility of the
+ <STRONG>NCURSES_VERSION</STRONG> preprocessor macro.
-</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
- <STRONG>unctrl</STRONG>.
+</PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
+ Thomas Dickey (to support <STRONG>lynx(1)</STRONG>'s font-switching feature).
-</PRE><H2><a name="h2-AUTHOR">AUTHOR</a></H2><PRE>
- Thomas Dickey (to support lynx's font-switching feature).
+</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
+ <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG>
- <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>
+ncurses 6.4 2024-04-20 <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>
</PRE>
<div class="nav">
<ul>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
+<li><a href="#h2-AUTHORS">AUTHORS</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
-<li><a href="#h2-AUTHOR">AUTHOR</a></li>
</ul>
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