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Dickey 31 * @Id: legacy_coding.3x,v 1.28 2024/04/20 19:13:50 tom Exp @ 32--> 33<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"> 34<HTML> 35<HEAD> 36<meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> 37<meta name="generator" content="Manpage converted by man2html - see https://invisible-island.net/scripts/readme.html#others_scripts"> 38<TITLE>legacy_coding 3x 2024-04-20 ncurses 6.5 Library calls</TITLE> 39<link rel="author" href="mailto:bug-ncurses@gnu.org"> 40 41</HEAD> 42<BODY> 43<H1 class="no-header">legacy_coding 3x 2024-04-20 ncurses 6.5 Library calls</H1> 44<PRE> 45<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> 46 47 48 49 50</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE> 51 <STRONG>use_legacy_coding</STRONG> - override <EM>curses</EM> locale encoding checks 52 53 54</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE> 55 <STRONG>#include</STRONG> <STRONG><curses.h></STRONG> 56 57 <STRONG>int</STRONG> <STRONG>use_legacy_coding(int</STRONG> <EM>level</EM><STRONG>);</STRONG> 58 59 60</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE> 61 <STRONG>use_legacy_coding</STRONG> is an extension to the <EM>curses</EM> library. It allows the 62 caller to change the result of <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG>, suppressing <STRONG>isprint(3)</STRONG>-based 63 checks within the library that would normally cause nonprinting 64 characters to be rendered in visible form. The alteration affects only 65 eight-bit characters. 66 67 The <EM>level</EM> parameter controls the result. 68 69 <STRONG>0</STRONG> The library functions normally, rendering nonprinting 70 characters as described in <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG>, 71 72 <STRONG>1</STRONG> the library ignores <EM>isprint</EM> for codes in the range 160-255. 73 74 <STRONG>2</STRONG> the library ignores <EM>isprint</EM> for codes in the range 128-255. 75 It also modifies the output of <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG>, showing codes in 76 the range 128-159 as is. 77 78 79</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE> 80 If the screen has not been initialized, or the <EM>level</EM> parameter is out 81 of range, <STRONG>use_legacy_coding</STRONG> returns <STRONG>ERR</STRONG>. Otherwise, it returns the 82 previous level: <STRONG>0</STRONG>, <STRONG>1</STRONG>, or <STRONG>2</STRONG>. 83 84 85</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE> 86 <STRONG>use_legacy_coding</STRONG> is specific to <EM>ncurses</EM>. It was not supported on 87 Version 7, BSD or System V implementations. Applications employing 88 <EM>ncurses</EM> extensions should condition their use on the visibility of the 89 <STRONG>NCURSES_VERSION</STRONG> preprocessor macro. 90 91 92</PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE> 93 Thomas Dickey (to support <STRONG>lynx(1)</STRONG>'s font-switching feature). 94 95 96</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE> 97 <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG> 98 99 100 101ncurses 6.5 2024-04-20 <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG> 102</PRE> 103<div class="nav"> 104<ul> 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-AUTHORS">AUTHORS</a></li> 111<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li> 112</ul> 113</div> 114</BODY> 115</HTML> 116