2 ****************************************************************************
3 * Copyright 2020 Thomas E. Dickey *
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29 ****************************************************************************
30 * Author: Thomas E. Dickey
31 * @Id: legacy_coding.3x,v 1.7 2020/02/02 23:34:34 tom Exp @
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43 <H1 class="no-header">legacy_coding 3x</H1>
45 <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG> <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>
50 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
51 <STRONG>use_legacy_coding</STRONG> - override locale-encoding checks
54 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
55 <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
57 <STRONG>int</STRONG> <STRONG>use_legacy_coding(int</STRONG> <STRONG>level);</STRONG>
60 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
61 The <STRONG>use_legacy_coding</STRONG> function is an extension to the curses library.
62 It allows the caller to change the result of <STRONG>unctrl</STRONG>, and suppress
63 related checks within the library that would normally cause nonprinting
64 characters to be rendered in visible form. This affects only 8-bit
67 The <EM>level</EM> parameter controls the result:
69 0 the library functions normally, rendering nonprinting char-
70 acters as described in <STRONG>unctrl</STRONG>.
72 1 the library ignores <STRONG>isprintf</STRONG> for codes in the range
75 2 the library ignores <STRONG>isprintf</STRONG> for codes in the range
76 128-255. It also modifies the output of <STRONG>unctrl</STRONG>, showing
77 codes in the range 128-159 as is.
80 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
81 If the screen has not been initialized, or the <EM>level</EM> parameter is out
82 of range, the function returns <STRONG>ERR</STRONG>. Otherwise, it returns the previous
83 level: <STRONG>0</STRONG>, <STRONG>1</STRONG> or <STRONG>2</STRONG>.
86 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
87 This routine is specific to ncurses. It was not supported on Version
88 7, BSD or System V implementations. It is recommended that any code
89 depending on ncurses extensions be conditioned using NCURSES_VERSION.
92 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
93 <STRONG>unctrl</STRONG>.
96 </PRE><H2><a name="h2-AUTHOR">AUTHOR</a></H2><PRE>
97 Thomas Dickey (to support lynx's font-switching feature).
101 <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>
105 <li><a href="#h2-NAME">NAME</a></li>
106 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
107 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
108 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
109 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
110 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
111 <li><a href="#h2-AUTHOR">AUTHOR</a></li>