Back to index

tetex-bin  3.0
lib_touch.c
Go to the documentation of this file.
00001 /****************************************************************************
00002  * Copyright (c) 1998,2000 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_touch.c
00036 **
00037 **        The routines      untouchwin(),
00038 **                   wtouchln(),
00039 **                   is_linetouched()
00040 **                   is_wintouched().
00041 **
00042 */
00043 
00044 #include <curses.priv.h>
00045 
00046 MODULE_ID("$Id: lib_touch.c,v 1.9 2000/12/10 02:43:27 tom Exp $")
00047 
00048 NCURSES_EXPORT(bool)
00049 is_linetouched(WINDOW *win, int line)
00050 {
00051     T((T_CALLED("is_linetouched(%p,%d)"), win, line));
00052 
00053     /* XSI doesn't define any error */
00054     if (!win || (line > win->_maxy) || (line < 0))
00055        returnCode((bool) ERR);
00056 
00057     returnCode(win->_line[line].firstchar != _NOCHANGE ? TRUE : FALSE);
00058 }
00059 
00060 NCURSES_EXPORT(bool)
00061 is_wintouched(WINDOW *win)
00062 {
00063     int i;
00064 
00065     T((T_CALLED("is_wintouched(%p)"), win));
00066 
00067     if (win)
00068        for (i = 0; i <= win->_maxy; i++)
00069            if (win->_line[i].firstchar != _NOCHANGE)
00070               returnCode(TRUE);
00071     returnCode(FALSE);
00072 }
00073 
00074 NCURSES_EXPORT(int)
00075 wtouchln(WINDOW *win, int y, int n, int changed)
00076 {
00077     int i;
00078 
00079     T((T_CALLED("wtouchln(%p,%d,%d,%d)"), win, y, n, changed));
00080 
00081     if (!win || (n < 0) || (y < 0) || (y > win->_maxy))
00082        returnCode(ERR);
00083 
00084     for (i = y; i < y + n; i++) {
00085        if (i > win->_maxy)
00086            break;
00087        win->_line[i].firstchar = changed ? 0 : _NOCHANGE;
00088        win->_line[i].lastchar = changed ? win->_maxx : _NOCHANGE;
00089     }
00090     returnCode(OK);
00091 }