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29 * Author: Thomas E. Dickey
30 * @Id: legacy_coding.3x,v 1.6 2017/03/15 08:14:25 tom Exp @
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42 <H1 class="no-header">legacy_coding 3x</H1>
44 <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG> <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>
49 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
50 <STRONG>use_legacy_coding</STRONG> - override locale-encoding checks
53 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
54 <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
56 <STRONG>int</STRONG> <STRONG>use_legacy_coding(int</STRONG> <STRONG>level);</STRONG>
59 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
60 The <STRONG>use_legacy_coding</STRONG> function is an extension to the
61 curses library. It allows the caller to change the result
62 of <STRONG>unctrl</STRONG>, and suppress related checks within the library
63 that would normally cause nonprinting characters to be
64 rendered in visible form. This affects only 8-bit charac-
67 The <EM>level</EM> parameter controls the result:
69 0 the library functions normally, rendering non-
70 printing characters as described in <STRONG>unctrl</STRONG>.
72 1 the library ignores <STRONG>isprintf</STRONG> for codes in the
75 2 the library ignores <STRONG>isprintf</STRONG> for codes in the
76 range 128-255. It also modifies the output of
77 <STRONG>unctrl</STRONG>, showing codes in the range 128-159 as
81 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
82 If the screen has not been initialized, or the <EM>level</EM>
83 parameter is out of range, the function returns <STRONG>ERR</STRONG>. Oth-
84 erwise, it returns the previous level: <STRONG>0</STRONG>, <STRONG>1</STRONG> or <STRONG>2</STRONG>.
87 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
88 This routine is specific to ncurses. It was not supported
89 on Version 7, BSD or System V implementations. It is rec-
90 ommended that any code depending on ncurses extensions be
91 conditioned using NCURSES_VERSION.
94 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
95 <STRONG>unctrl</STRONG>.
98 </PRE><H2><a name="h2-AUTHOR">AUTHOR</a></H2><PRE>
99 Thomas Dickey (to support lynx's font-switching feature).
103 <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>
107 <li><a href="#h2-NAME">NAME</a></li>
108 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
109 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
110 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
111 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
112 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
113 <li><a href="#h2-AUTHOR">AUTHOR</a></li>