.\"***************************************************************************.\" Copyright (c) 1998 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_clear.3x,v 1.7 1998/03/11 21:12:53 juergen Exp $.TH curs_clear 3X "".SH NAME\fBerase\fR, \fBwerase\fR, \fBclear\fR,\fBwclear\fR, \fBclrtobot\fR, \fBwclrtobot\fR, \fBclrtoeol\fR,\fBwclrtoeol\fR - clear all or part of a \fBcurses\fR window.SH SYNOPSIS\fB# include <curses.h>\fR\fBint erase(void);\fR.br\fBint werase(WINDOW *win);\fR.br\fBint clear(void);\fR.br\fBint wclear(WINDOW *win);\fR.br\fBint clrtobot(void);\fR.br\fBint wclrtobot(WINDOW *win);\fR.br\fBint clrtoeol(void);\fR.br\fBint wclrtoeol(WINDOW *win);\fR.br.SH DESCRIPTIONThe \fBerase\fR and \fBwerase\fR routines copy blanks to everyposition in the window, clearing the screen.The \fBclear\fR and \fBwclear\fR routines are like \fBerase\fR and\fBwerase\fR, but they also call \fBclearok\fR, so that the screen iscleared completely on the next call to \fBwrefresh\fR for that windowand repainted from scratch.The \fBclrtobot\fR and \fBwclrtobot\fR routines erase from the cursor to theend of screen.  That is, they erase all lines below the cursor in the window.Also, the current line to the right of the cursor, inclusive, is erased.The \fBclrtoeol\fR and \fBwclrtoeol\fR routines erase the current lineto the right of the cursor, inclusive, to the end of the current line.Blanks created by erasure have the current background rendition (as setby \fBwbkgdset\fR) merged into them..SH RETURN VALUEAll routines return the integer \fBOK\fR.  The SVr4.0 manual says "or anon-negative integer if \fBimmedok\fR is set", but this appears to be an error..SH NOTESNote that \fBerase\fR, \fBwerase\fR, \fBclear\fR, \fBwclear\fR,\fBclrtobot\fR, and \fBclrtoeol\fR may be macros..SH PORTABILITYThese functions are described in the XSI Curses standard, Issue 4.  Thestandard specifies that they return \fBERR\fR on failure, but specifies noerror conditions.Some historic curses implementations had, as an undocumented feature, theability to do the equivalent of \fBclearok(..., 1)\fR by saying\fBtouchwin(stdscr)\fR or \fBclear(stdscr)\fR.  This will not work underncurses..SH SEE ALSO\fBcurses\fR(3X), \fBcurs_outopts\fR(3X), \fBcurs_refresh\fR(3X).\"#.\"# The following sets edit modes for GNU EMACS.\"# Local Variables:.\"# mode:nroff.\"# fill-column:79.\"# End: