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tetex-bin  3.0
lib_clreol.c
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00001 /****************************************************************************
00002  * Copyright (c) 1998,1999,2000,2001 Free Software Foundation, Inc.         *
00003  *                                                                          *
00004  * Permission is hereby granted, free of charge, to any person obtaining a  *
00005  * copy of this software and associated documentation files (the            *
00006  * "Software"), to deal in the Software without restriction, including      *
00007  * without limitation the rights to use, copy, modify, merge, publish,      *
00008  * distribute, distribute with modifications, sublicense, and/or sell       *
00009  * copies of the Software, and to permit persons to whom the Software is    *
00010  * furnished to do so, subject to the following conditions:                 *
00011  *                                                                          *
00012  * The above copyright notice and this permission notice shall be included  *
00013  * in all copies or substantial portions of the Software.                   *
00014  *                                                                          *
00015  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
00016  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
00017  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
00018  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
00019  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
00020  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
00021  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
00022  *                                                                          *
00023  * Except as contained in this notice, the name(s) of the above copyright   *
00024  * holders shall not be used in advertising or otherwise to promote the     *
00025  * sale, use or other dealings in this Software without prior written       *
00026  * authorization.                                                           *
00027  ****************************************************************************/
00028 
00029 /****************************************************************************
00030  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
00031  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
00032  ****************************************************************************/
00033 
00034 /*
00035 **     lib_clreol.c
00036 **
00037 **     The routine wclrtoeol().
00038 **
00039 */
00040 
00041 #include <curses.priv.h>
00042 
00043 MODULE_ID("$Id: lib_clreol.c,v 1.21 2001/12/19 01:06:04 tom Exp $")
00044 
00045 NCURSES_EXPORT(int)
00046 wclrtoeol(WINDOW *win)
00047 {
00048     int code = ERR;
00049 
00050     T((T_CALLED("wclrtoeol(%p)"), win));
00051 
00052     if (win) {
00053        NCURSES_CH_T blank;
00054        NCURSES_CH_T *ptr, *end;
00055        struct ldat *line;
00056        NCURSES_SIZE_T y = win->_cury;
00057        NCURSES_SIZE_T x = win->_curx;
00058 
00059        /*
00060         * If we have just wrapped the cursor, the clear applies to the
00061         * new line, unless we are at the lower right corner.
00062         */
00063        if ((win->_flags & _WRAPPED) != 0
00064            && y < win->_maxy) {
00065            win->_flags &= ~_WRAPPED;
00066        }
00067 
00068        /*
00069         * There's no point in clearing if we're not on a legal
00070         * position, either.
00071         */
00072        if ((win->_flags & _WRAPPED) != 0
00073            || y > win->_maxy
00074            || x > win->_maxx)
00075            returnCode(ERR);
00076 
00077        blank = win->_nc_bkgd;
00078        line = &win->_line[y];
00079        CHANGED_TO_EOL(line, x, win->_maxx);
00080 
00081        ptr = &(line->text[x]);
00082        end = &(line->text[win->_maxx]);
00083 
00084        while (ptr <= end)
00085            *ptr++ = blank;
00086 
00087        _nc_synchook(win);
00088        code = OK;
00089     }
00090     returnCode(code);
00091 }