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| * @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 2024-04-20 ncurses 6.5 Library calls</H1> |
| <PRE> |
| <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> |
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| |
| </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE> |
| <STRONG>use_legacy_coding</STRONG> - override <EM>curses</EM> locale encoding checks |
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| |
| </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE> |
| <STRONG>#include</STRONG> <STRONG><curses.h></STRONG> |
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| <STRONG>int</STRONG> <STRONG>use_legacy_coding(int</STRONG> <EM>level</EM><STRONG>);</STRONG> |
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| |
| </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE> |
| <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. |
| |
| <STRONG>0</STRONG> The library functions normally, rendering nonprinting |
| characters as described in <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG>, |
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| <STRONG>1</STRONG> the library ignores <EM>isprint</EM> for codes in the range 160-255. |
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| <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, <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>. |
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| |
| </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE> |
| <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-AUTHORS">AUTHORS</a></H2><PRE> |
| Thomas Dickey (to support <STRONG>lynx(1)</STRONG>'s font-switching feature). |
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| |
| </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE> |
| <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG> |
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| ncurses 6.5 2024-04-20 <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG> |
| </PRE> |
| <div class="nav"> |
| <ul> |
| <li><a href="#h2-NAME">NAME</a></li> |
| <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li> |
| <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> |
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