<!-- 
  ****************************************************************************
  * Copyright (c) 1998-2010,2015 Free Software Foundation, Inc.                        *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
  * "Software"), to deal in the Software without restriction, including      *
  * without limitation the rights to use, copy, modify, merge, publish,      *
  * distribute, distribute with modifications, sublicense, and/or sell       *
  * copies of the Software, and to permit persons to whom the Software is    *
  * furnished to do so, subject to the following conditions:                 *
  *                                                                          *
  * The above copyright notice and this permission notice shall be included  *
  * in all copies or substantial portions of the Software.                   *
  *                                                                          *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  *                                                                          *
  * Except as contained in this notice, the name(s) of the above copyright   *
  * holders shall not be used in advertising or otherwise to promote the     *
  * sale, use or other dealings in this Software without prior written       *
  * authorization.                                                           *
  ****************************************************************************
  * @Id: curs_kernel.3x,v 1.20 2015/07/21 01:10:11 tom Exp @
-->
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="generator" content="Manpage converted by man2html - see http://invisible-island.net/scripts/readme.html#others_scripts">
<TITLE>curs_kernel 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>
<H1 class="no-header">curs_kernel 3x</H1>
<PRE>
<STRONG><A HREF="curs_kernel.3x.html">curs_kernel(3x)</A></STRONG>                                         <STRONG><A HREF="curs_kernel.3x.html">curs_kernel(3x)</A></STRONG>


</PRE>
<H2><a name="h2-NAME">NAME</a></H2><PRE>
       <STRONG>def_prog_mode</STRONG>, <STRONG>def_shell_mode</STRONG>, <STRONG>reset_prog_mode</STRONG>,
       <STRONG>reset_shell_mode</STRONG>, <STRONG>resetty</STRONG>, <STRONG>savetty</STRONG>, <STRONG>getsyx</STRONG>, <STRONG>setsyx</STRONG>,
       <STRONG>ripoffline</STRONG>, <STRONG>curs_set</STRONG>, <STRONG>napms</STRONG> - low-level <STRONG>curses</STRONG> routines


</PRE>
<H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
       <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>

       <STRONG>int</STRONG> <STRONG>def_prog_mode(void);</STRONG>
       <STRONG>int</STRONG> <STRONG>def_shell_mode(void);</STRONG>
       <STRONG>int</STRONG> <STRONG>reset_prog_mode(void);</STRONG>
       <STRONG>int</STRONG> <STRONG>reset_shell_mode(void);</STRONG>
       <STRONG>int</STRONG> <STRONG>resetty(void);</STRONG>
       <STRONG>int</STRONG> <STRONG>savetty(void);</STRONG>
       <STRONG>void</STRONG> <STRONG>getsyx(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>);</STRONG>
       <STRONG>void</STRONG> <STRONG>setsyx(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>);</STRONG>
       <STRONG>int</STRONG> <STRONG>ripoffline(int</STRONG> <EM>line</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <STRONG>(*</STRONG><EM>init</EM><STRONG>)(WINDOW</STRONG> <STRONG>*,</STRONG> <STRONG>int));</STRONG>
       <STRONG>int</STRONG> <STRONG>curs_set(int</STRONG> <EM>visibility</EM><STRONG>);</STRONG>
       <STRONG>int</STRONG> <STRONG>napms(int</STRONG> <EM>ms</EM><STRONG>);</STRONG>


</PRE>
<H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
       The  following  routines  give low-level access to various
       <STRONG>curses</STRONG> capabilities.  These routines  typically  are  used
       inside library routines.


</PRE>
<H3><a name="h3-def_prog_mode_-def_shell_mode">def_prog_mode, def_shell_mode</a></H3><PRE>
       The  <STRONG>def_prog_mode</STRONG>  and  <STRONG>def_shell_mode</STRONG>  routines save the
       current terminal modes as the  "program"  (in  <STRONG>curses</STRONG>)  or
       "shell"   (not  in  <STRONG>curses</STRONG>)  state  for  use  by  the  <STRONG>re-</STRONG>
       <STRONG>set_prog_mode</STRONG> and <STRONG>reset_shell_mode</STRONG> routines.  This is done
       automatically by <STRONG>initscr</STRONG>.  There is one such save area for
       each screen context allocated by <STRONG>newterm()</STRONG>.


</PRE>
<H3><a name="h3-reset_prog_mode_-reset_shell_mode">reset_prog_mode, reset_shell_mode</a></H3><PRE>
       The <STRONG>reset_prog_mode</STRONG> and <STRONG>reset_shell_mode</STRONG> routines  restore
       the  terminal  to "program" (in <STRONG>curses</STRONG>) or "shell" (out of
       <STRONG>curses</STRONG>) state.  These are  done  automatically  by  <STRONG>endwin</STRONG>
       and,  after  an  <STRONG>endwin</STRONG>, by <STRONG>doupdate</STRONG>, so they normally are
       not called.


</PRE>
<H3><a name="h3-resetty_-savetty">resetty, savetty</a></H3><PRE>
       The <STRONG>resetty</STRONG> and <STRONG>savetty</STRONG>  routines  save  and  restore  the
       state  of  the  terminal modes.  <STRONG>savetty</STRONG> saves the current
       state in a buffer and <STRONG>resetty</STRONG> restores the state  to  what
       it was at the last call to <STRONG>savetty</STRONG>.


</PRE>
<H3><a name="h3-getsyx">getsyx</a></H3><PRE>
       The  <STRONG>getsyx</STRONG> routine returns the current coordinates of the
       virtual screen cursor in <EM>y</EM> and <EM>x</EM>.  If <STRONG>leaveok</STRONG> is currently
       <STRONG>TRUE</STRONG>,  then <STRONG>-1</STRONG>,<STRONG>-1</STRONG> is returned.  If lines have been removed
       from the top of the screen, using <STRONG>ripoffline</STRONG>, <EM>y</EM> and <EM>x</EM>  in-
       clude  these lines; therefore, <EM>y</EM> and <EM>x</EM> should be used only
       as arguments for <STRONG>setsyx</STRONG>.


</PRE>
<H3><a name="h3-setsyx">setsyx</a></H3><PRE>
       The <STRONG>setsyx</STRONG> routine sets the virtual screen cursor to <EM>y</EM>, <EM>x</EM>.
       If <EM>y</EM> and <EM>x</EM> are both <STRONG>-1</STRONG>, then <STRONG>leaveok</STRONG> is set.  The two rou-
       tines <STRONG>getsyx</STRONG> and <STRONG>setsyx</STRONG> are designed to be used by  a  li-
       brary  routine,  which manipulates <STRONG>curses</STRONG> windows but does
       not want to change the current position of  the  program's
       cursor.   The library routine would call <STRONG>getsyx</STRONG> at the be-
       ginning, do its manipulation of  its  own  windows,  do  a
       <STRONG>wnoutrefresh</STRONG>  on  its  windows, call <STRONG>setsyx</STRONG>, and then call
       <STRONG>doupdate</STRONG>.


</PRE>
<H3><a name="h3-ripoffline">ripoffline</a></H3><PRE>
       The <STRONG>ripoffline</STRONG> routine provides access to the same facili-
       ty  that  <STRONG>slk_init</STRONG>  [see  <STRONG><A HREF="curs_slk.3x.html">curs_slk(3x)</A></STRONG>] uses to reduce the
       size of the screen.   <STRONG>ripoffline</STRONG>  must  be  called  before
       <STRONG>initscr</STRONG> or <STRONG>newterm</STRONG> is called, to prepare these initial ac-
       tions:

       <STRONG>o</STRONG>   If <EM>line</EM> is positive, a line is removed from the top of
           <STRONG>stdscr</STRONG>.

       <STRONG>o</STRONG>   if  <EM>line</EM>  is negative, a line is removed from the bot-
           tom.

       When the resulting initialization is done inside  <STRONG>initscr</STRONG>,
       the routine <STRONG>init</STRONG> (supplied by the user) is called with two
       arguments:

       <STRONG>o</STRONG>   a window pointer to the one-line window that has  been
           allocated and

       <STRONG>o</STRONG>   an integer with the number of columns in the window.

       Inside  this initialization routine, the integer variables
       <STRONG>LINES</STRONG> and <STRONG>COLS</STRONG> (defined in <STRONG>&lt;curses.h&gt;</STRONG>) are not  guaranteed
       to  be  accurate  and  <STRONG>wrefresh</STRONG>  or  <STRONG>doupdate</STRONG>  must not be
       called.  It is allowable to call <STRONG>wnoutrefresh</STRONG>  during  the
       initialization routine.

       <STRONG>ripoffline</STRONG>  can  be called up to five times before calling
       <STRONG>initscr</STRONG> or <STRONG>newterm</STRONG>.


</PRE>
<H3><a name="h3-curs_set">curs_set</a></H3><PRE>
       The <STRONG>curs_set</STRONG> routine sets the cursor state  to  invisible,
       normal, or very visible for <STRONG>visibility</STRONG> equal to <STRONG>0</STRONG>, <STRONG>1</STRONG>, or <STRONG>2</STRONG>
       respectively.  If the terminal supports the <EM>visibility</EM> re-
       quested, the previous <EM>cursor</EM> state is returned; otherwise,
       <STRONG>ERR</STRONG> is returned.


</PRE>
<H3><a name="h3-napms">napms</a></H3><PRE>
       The <STRONG>napms</STRONG> routine is used to sleep for <EM>ms</EM> milliseconds.


</PRE>
<H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
       Except for <STRONG>curs_set</STRONG>, these routines always return <STRONG>OK</STRONG>.

       <STRONG>curs_set</STRONG> returns the previous cursor state, or <STRONG>ERR</STRONG> if  the
       requested <EM>visibility</EM> is not supported.

       X/Open  defines  no error conditions.  In this implementa-
       tion

       <STRONG>def_prog_mode</STRONG>, <STRONG>def_shell_mode</STRONG>, <STRONG>reset_prog_mode</STRONG>,
       <STRONG>reset_shell_mode</STRONG>
            return  an error if the terminal was not initialized,
            or if the I/O call to obtain  the  terminal  settings
            fails.

       <STRONG>ripoffline</STRONG>
            returns  an error if the maximum number of ripped-off
            lines exceeds the maximum (NRIPS = 5).


</PRE>
<H2><a name="h2-NOTES">NOTES</a></H2><PRE>
       Note that <STRONG>getsyx</STRONG> is a macro, so <STRONG>&amp;</STRONG> is not necessary  before
       the variables <EM>y</EM> and <EM>x</EM>.

       Older  SVr4  man  pages  warn  that  the  return  value of
       <STRONG>curs_set</STRONG> "is currently  incorrect".   This  implementation
       gets  it  right, but it may be unwise to count on the cor-
       rectness of the return value anywhere else.

       Both ncurses and SVr4 will  call  <STRONG>curs_set</STRONG>  in  <STRONG>endwin</STRONG>  if
       <STRONG>curs_set</STRONG>  has  been  called  to make the cursor other than
       normal, i.e., either invisible or very visible.  There  is
       no  way  for ncurses to determine the initial cursor state
       to restore that.


</PRE>
<H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
       The functions <STRONG>setsyx</STRONG> and <STRONG>getsyx</STRONG> are not described  in  the
       XSI  Curses standard, Issue 4.  All other functions are as
       described in XSI Curses.

       The SVr4 documentation describes <STRONG>setsyx</STRONG> and <STRONG>getsyx</STRONG> as hav-
       ing  return  type  int.  This  is  misleading, as they are
       macros with no documented semantics for the return value.


</PRE>
<H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
       <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>,  <STRONG><A HREF="curs_outopts.3x.html">curs_outopts(3x)</A></STRONG>,  <STRONG>curs_re-</STRONG>
       <STRONG><A HREF="curs_refresh.3x.html">fresh(3x)</A></STRONG>,   <STRONG><A HREF="curs_scr_dump.3x.html">curs_scr_dump(3x)</A></STRONG>,  <STRONG><A HREF="curs_slk.3x.html">curs_slk(3x)</A></STRONG>,  <STRONG>curs_vari-</STRONG>
       <STRONG><A HREF="curs_variables.3x.html">ables(3x)</A></STRONG>.


                                                        <STRONG><A HREF="curs_kernel.3x.html">curs_kernel(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>
<ul>
<li><a href="#h3-def_prog_mode_-def_shell_mode">def_prog_mode, def_shell_mode</a></li>
<li><a href="#h3-reset_prog_mode_-reset_shell_mode">reset_prog_mode, reset_shell_mode</a></li>
<li><a href="#h3-resetty_-savetty">resetty, savetty</a></li>
<li><a href="#h3-getsyx">getsyx</a></li>
<li><a href="#h3-setsyx">setsyx</a></li>
<li><a href="#h3-ripoffline">ripoffline</a></li>
<li><a href="#h3-curs_set">curs_set</a></li>
<li><a href="#h3-napms">napms</a></li>
</ul>
</li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-NOTES">NOTES</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
</ul>
</div>
</BODY>
</HTML>