* authorization. *
****************************************************************************
* Author: Thomas E. Dickey
- * @Id: legacy_coding.3x,v 1.26 2024/03/16 15:35:01 tom Exp @
+ * @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 2024-03-16 ncurses 6.4 Library calls</H1>
+<H1 class="no-header">legacy_coding 3x 2024-04-20 ncurses 6.4 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>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
- The <STRONG>use_legacy_coding</STRONG> 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
- characters.
+ <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:
+ The <EM>level</EM> parameter controls the result.
- 0 the library functions normally, rendering nonprinting
- characters as described in <STRONG>unctrl</STRONG>.
+ <STRONG>0</STRONG> The library functions normally, rendering nonprinting
+ characters as described in <STRONG><A HREF="unctrl.3x.html">unctrl(3x)</A></STRONG>,
- 1 the library ignores <STRONG>isprintf</STRONG> for codes in the range
- 160-255.
+ <STRONG>1</STRONG> the library ignores <EM>isprint</EM> 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.
+ <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, the function returns <STRONG>ERR</STRONG>. Otherwise, it returns the previous
- level: <STRONG>0</STRONG>, <STRONG>1</STRONG> or <STRONG>2</STRONG>.
+ 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>.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
- This routine is specific to <EM>ncurses</EM>. It was not supported on Version
- 7, BSD or System V implementations. It is recommended that any code
- depending on <EM>ncurses</EM> extensions be conditioned using NCURSES_VERSION.
+ <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 lynx's font-switching feature).
+ Thomas Dickey (to support <STRONG>lynx(1)</STRONG>'s font-switching feature).
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
-ncurses 6.4 2024-0
3-16 <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>
+ncurses 6.4 2024-0
4-20 <STRONG><A HREF="legacy_coding.3x.html">legacy_coding(3x)</A></STRONG>
</PRE>
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