| Amit Daniel Kachhap | e6a01f5 | 2011-07-20 11:45:59 +0530 | [diff] [blame] | 1 | /**************************************************************************** |
| 2 | * Copyright (c) 1998,2000,2001 Free Software Foundation, Inc. * |
| 3 | * * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a * |
| 5 | * copy of this software and associated documentation files (the * |
| 6 | * "Software"), to deal in the Software without restriction, including * |
| 7 | * without limitation the rights to use, copy, modify, merge, publish, * |
| 8 | * distribute, distribute with modifications, sublicense, and/or sell * |
| 9 | * copies of the Software, and to permit persons to whom the Software is * |
| 10 | * furnished to do so, subject to the following conditions: * |
| 11 | * * |
| 12 | * The above copyright notice and this permission notice shall be included * |
| 13 | * in all copies or substantial portions of the Software. * |
| 14 | * * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * |
| 16 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * |
| 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * |
| 18 | * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * |
| 19 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * |
| 20 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * |
| 21 | * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * |
| 22 | * * |
| 23 | * Except as contained in this notice, the name(s) of the above copyright * |
| 24 | * holders shall not be used in advertising or otherwise to promote the * |
| 25 | * sale, use or other dealings in this Software without prior written * |
| 26 | * authorization. * |
| 27 | ****************************************************************************/ |
| 28 | |
| 29 | /**************************************************************************** |
| 30 | * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * |
| 31 | * and: Eric S. Raymond <esr@snark.thyrsus.com> * |
| 32 | * and: Thomas E. Dickey 1996-on * |
| 33 | ****************************************************************************/ |
| 34 | |
| 35 | /* |
| 36 | ** lib_erase.c |
| 37 | ** |
| 38 | ** The routine werase(). |
| 39 | ** |
| 40 | */ |
| 41 | |
| 42 | #include <curses.priv.h> |
| 43 | |
| 44 | MODULE_ID("$Id: lib_erase.c,v 1.16 2005/10/30 00:36:36 tom Exp $") |
| 45 | |
| 46 | NCURSES_EXPORT(int) |
| 47 | werase(WINDOW *win) |
| 48 | { |
| 49 | int code = ERR; |
| 50 | int y; |
| 51 | NCURSES_CH_T blank; |
| 52 | NCURSES_CH_T *sp, *end, *start; |
| 53 | |
| 54 | T((T_CALLED("werase(%p)"), win)); |
| 55 | |
| 56 | if (win) { |
| 57 | blank = win->_nc_bkgd; |
| 58 | for (y = 0; y <= win->_maxy; y++) { |
| 59 | start = win->_line[y].text; |
| 60 | end = &start[win->_maxx]; |
| 61 | |
| 62 | /* |
| 63 | * If this is a derived window, we have to handle the case where |
| 64 | * a multicolumn character extends into the window that we are |
| 65 | * erasing. |
| 66 | */ |
| 67 | if_WIDEC({ |
| 68 | if (isWidecExt(start[0])) { |
| 69 | int x = (win->_parent != 0) ? (win->_begx) : 0; |
| 70 | while (x-- > 0) { |
| 71 | if (isWidecBase(start[-1])) { |
| 72 | --start; |
| 73 | break; |
| 74 | } |
| 75 | --start; |
| 76 | } |
| 77 | } |
| 78 | }); |
| 79 | |
| 80 | for (sp = start; sp <= end; sp++) |
| 81 | *sp = blank; |
| 82 | |
| 83 | win->_line[y].firstchar = 0; |
| 84 | win->_line[y].lastchar = win->_maxx; |
| 85 | } |
| 86 | win->_curx = win->_cury = 0; |
| 87 | win->_flags &= ~_WRAPPED; |
| 88 | _nc_synchook(win); |
| 89 | code = OK; |
| 90 | } |
| 91 | returnCode(code); |
| 92 | } |