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[ncurses.git] / doc / html / man / curs_clear.3x.html
diff --git a/doc/html/man/curs_clear.3x.html b/doc/html/man/curs_clear.3x.html
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@@ -1,129 +1,135 @@
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+  * @Id: curs_clear.3x,v 1.10 2005/10/01 19:34:43 tom Exp @
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 <HTML>
 <HTML>
+<HEAD>
+<TITLE>curs_clear 3x</TITLE>
+<link rev=made href="mailto:bug-ncurses@gnu.org">
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+</HEAD>
 <BODY>
 <BODY>
+<H1>curs_clear 3x</H1>
+<HR>
 <PRE>
 <!-- Manpage converted by man2html 3.0.1 -->
 <PRE>
 <!-- Manpage converted by man2html 3.0.1 -->
+<STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>                                           <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>
+
+
+
 
 </PRE>
 <H2>NAME</H2><PRE>
 
 </PRE>
 <H2>NAME</H2><PRE>
-       <B>erase</B>,  <B>werase</B>,  <B>clear</B>,  <B>wclear</B>, <B>clrtobot</B>, <B>wclrtobot</B>, <B>clr-</B>
-       <B>toeol</B>, <B>wclrtoeol</B> - clear all or part of a <B>curses</B> window
+       <STRONG>erase</STRONG>, <STRONG>werase</STRONG>, <STRONG>clear</STRONG>, <STRONG>wclear</STRONG>, <STRONG>clrtobot</STRONG>, <STRONG>wclrtobot</STRONG>,
+       <STRONG>clrtoeol</STRONG>, <STRONG>wclrtoeol</STRONG> - clear all or part of a <STRONG>curses</STRONG> window
 
 
 </PRE>
 <H2>SYNOPSIS</H2><PRE>
 
 
 </PRE>
 <H2>SYNOPSIS</H2><PRE>
-       <B>#</B> <B>include</B> <B>&lt;curses.h&gt;</B>
+       <STRONG>#</STRONG> <STRONG>include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
 
 
-       <B>int</B> <B>erase(void);</B>
-       <B>int</B> <B>werase(WINDOW</B> <B>*win);</B>
-       <B>int</B> <B>clear(void);</B>
-       <B>int</B> <B>wclear(WINDOW</B> <B>*win);</B>
-       <B>int</B> <B>clrtobot(void);</B>
-       <B>int</B> <B>wclrtobot(WINDOW</B> <B>*win);</B>
-       <B>int</B> <B>clrtoeol(void);</B>
-       <B>int</B> <B>wclrtoeol(WINDOW</B> <B>*win);</B>
+       <STRONG>int</STRONG> <STRONG>erase(void);</STRONG>
+       <STRONG>int</STRONG> <STRONG>werase(WINDOW</STRONG> <STRONG>*win);</STRONG>
+       <STRONG>int</STRONG> <STRONG>clear(void);</STRONG>
+       <STRONG>int</STRONG> <STRONG>wclear(WINDOW</STRONG> <STRONG>*win);</STRONG>
+       <STRONG>int</STRONG> <STRONG>clrtobot(void);</STRONG>
+       <STRONG>int</STRONG> <STRONG>wclrtobot(WINDOW</STRONG> <STRONG>*win);</STRONG>
+       <STRONG>int</STRONG> <STRONG>clrtoeol(void);</STRONG>
+       <STRONG>int</STRONG> <STRONG>wclrtoeol(WINDOW</STRONG> <STRONG>*win);</STRONG>
 
 
 </PRE>
 <H2>DESCRIPTION</H2><PRE>
 
 
 </PRE>
 <H2>DESCRIPTION</H2><PRE>
-       The <B>erase</B> and <B>werase</B> routines copy blanks to  every  posi-
+       The  <STRONG>erase</STRONG>  and <STRONG>werase</STRONG> routines copy blanks to every posi-
        tion in the window, clearing the screen.
 
        tion in the window, clearing the screen.
 
-       The  <B>clear</B>  and <B>wclear</B> routines are like <B>erase</B> and <B>werase</B>,
-       but they also call <B>clearok</B>, so that the screen is  cleared
-       completely  on  the  next call to <B>wrefresh</B> for that window
+       The <STRONG>clear</STRONG> and <STRONG>wclear</STRONG> routines are like <STRONG>erase</STRONG>  and  <STRONG>werase</STRONG>,
+       but  they also call <STRONG>clearok</STRONG>, so that the screen is cleared
+       completely on the next call to <STRONG>wrefresh</STRONG>  for  that  window
        and repainted from scratch.
 
        and repainted from scratch.
 
-       The <B>clrtobot</B> and <B>wclrtobot</B> routines erase from the  cursor
+       The  <STRONG>clrtobot</STRONG> and <STRONG>wclrtobot</STRONG> routines erase from the cursor
        to the end of screen.  That is, they erase all lines below
        to the end of screen.  That is, they erase all lines below
-       the cursor in the window.  Also, the current line  to  the
+       the  cursor  in the window.  Also, the current line to the
        right of the cursor, inclusive, is erased.
 
        right of the cursor, inclusive, is erased.
 
-       The <B>clrtoeol</B> and <B>wclrtoeol</B> routines erase the current line
-       to the right of the cursor, inclusive, to the end  of  the
+       The <STRONG>clrtoeol</STRONG> and <STRONG>wclrtoeol</STRONG> routines erase the current line
+       to  the  right of the cursor, inclusive, to the end of the
        current line.
 
        Blanks created by erasure have the current background ren-
        current line.
 
        Blanks created by erasure have the current background ren-
-       dition (as set by <B>wbkgdset</B>) merged into them.
+       dition (as set by <STRONG>wbkgdset</STRONG>) merged into them.
 
 
 </PRE>
 <H2>RETURN VALUE</H2><PRE>
 
 
 </PRE>
 <H2>RETURN VALUE</H2><PRE>
-       All routines return the integer  <B>OK</B>.   The  SVr4.0  manual
-       says  "or  a  non-negative integer if <B>immedok</B> is set", but
-       this appears to be an error.
+       All  routines  return the integer <STRONG>OK</STRONG> on success and <STRONG>ERR</STRONG> on
+       failure.  The SVr4.0 manual says "or a non-negative  inte-
+       ger if <STRONG>immedok</STRONG> is set", but this appears to be an error.
+
+       X/Open  defines  no error conditions.  In this implementa-
+       tion, functions using a window pointer parameter return an
+       error if it is null.
 
 
 </PRE>
 <H2>NOTES</H2><PRE>
 
 
 </PRE>
 <H2>NOTES</H2><PRE>
-       Note that <B>erase</B>, <B>werase</B>, <B>clear</B>, <B>wclear</B>, <B>clrtobot</B>, and <B>clr-</B>
-       <B>toeol</B> may be macros.
+       Note that <STRONG>erase</STRONG>, <STRONG>werase</STRONG>, <STRONG>clear</STRONG>, <STRONG>wclear</STRONG>, <STRONG>clrtobot</STRONG>, and <STRONG>clr-</STRONG>
+       <STRONG>toeol</STRONG> may be macros.
 
 
 </PRE>
 <H2>PORTABILITY</H2><PRE>
 
 
 </PRE>
 <H2>PORTABILITY</H2><PRE>
-       These  functions are described in the XSI Curses standard,
-       Issue 4.  The standard specifies that they return  <B>ERR</B>  on
+       These functions are described in the XSI Curses  standard,
+       Issue  4.   The standard specifies that they return <STRONG>ERR</STRONG> on
        failure, but specifies no error conditions.
 
        failure, but specifies no error conditions.
 
-       Some  historic  curses  implementations had, as an undocu-
-       mented feature,  the  ability  to  do  the  equivalent  of
-       <B>clearok(...,</B>    <B>1)</B>    by    saying   <B>touchwin(stdscr)</B>   or
-       <B>clear(stdscr)</B>.  This will not work under ncurses.
+       Some historic curses implementations had,  as  an  undocu-
+       mented  feature,  the  ability  to  do  the  equivalent of
+       <STRONG>clearok(...,</STRONG> <STRONG>1)</STRONG> by saying <STRONG>touchwin(stdscr)</STRONG>  or  <STRONG>clear(std-</STRONG>
+       <STRONG>scr)</STRONG>.  This will not work under ncurses.
+
+       This  implementation, and others such as Solaris, sets the
+       current position to 0,0 after  erasing  via  <STRONG>werase()</STRONG>  and
+       <STRONG>wclear()</STRONG>.   That fact is not documented in other implemen-
+       tations, and may not be true of implementations which were
+       not derived from SVr4 source.
 
 
 </PRE>
 <H2>SEE ALSO</H2><PRE>
 
 
 </PRE>
 <H2>SEE ALSO</H2><PRE>
-       <B><A HREF="ncurses.3x.html">curses(3x)</A></B>, <B><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></B>, <B><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></B>
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+       <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>
 
 
 
 
 
 
+                                                         <STRONG><A HREF="curs_clear.3x.html">curs_clear(3x)</A></STRONG>
 </PRE>
 <HR>
 <ADDRESS>
 </PRE>
 <HR>
 <ADDRESS>
ncurses, with patches starting at ncurses-5.6; new users should use https://github.com/ThomasDickey/ncurses-snapshots/