1 /**************************************************************************** 2 * Copyright (c) 2016-2017,2018 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: Thomas E. Dickey * 31 ****************************************************************************/ 32 33 /* 34 * clear.c -- clears the terminal's screen 35 */ 36 37 #define USE_LIBTINFO 38 #include <clear_cmd.h> 39 40 MODULE_ID("$Id: clear_cmd.c,v 1.4 2018/08/04 18:43:22 Nicholas.Marriott Exp $") 41 42 static int 43 putch(int c) 44 { 45 return putchar(c); 46 } 47 48 int 49 clear_cmd(bool legacy) 50 { 51 int retval = tputs(clear_screen, lines > 0 ? lines : 1, putch); 52 if (!legacy) { 53 /* Clear the scrollback buffer if possible. */ 54 char *E3 = tigetstr("E3"); 55 if (E3) 56 (void) tputs(E3, lines > 0 ? lines : 1, putch); 57 } 58 return retval; 59 } 60