ncurses-5.7/doc/html/man/legacy_coding.3x.html

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  * Author: Thomas E. Dickey
  * @Id: legacy_coding.3x,v 1.3 2006/12/24 15:12:55 tom Exp @
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<H1>legacy_coding 3x</H1>
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<STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>                                     <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>




</PRE>
<H2>NAME</H2><PRE>
       <STRONG>use_legacy_coding</STRONG> - use terminal's default colors


</PRE>
<H2>SYNOPSIS</H2><PRE>
       <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>

       <STRONG>int</STRONG> <STRONG>use_legacy_coding(int</STRONG> <STRONG>level);</STRONG>


</PRE>
<H2>DESCRIPTION</H2><PRE>
       The  <EM>use</EM><STRONG>_</STRONG><EM>legacy</EM><STRONG>_</STRONG><EM>coding()</EM>  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.

       The <EM>level</EM> parameter controls the result:

              0    the library functions normally, rendering non-
                   printing characters as described in <STRONG>unctrl</STRONG>.

              1    the  library ignores <STRONG>isprintf</STRONG> 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.


</PRE>
<H2>RETURN VALUE</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>.


</PRE>
<H2>PORTABILITY</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.


</PRE>
<H2>SEE ALSO</H2><PRE>
       <STRONG>unctrl</STRONG>.


</PRE>
<H2>AUTHOR</H2><PRE>
       Thomas Dickey (to support lynx's font-switching  feature).



                                                      <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>
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