ncurses 6.0 - patch 20161022

[ncurses.git] / progs / clear_cmd.c

diff --git a/progs/clear_cmd.c b/progs/clear_cmd.c
new file mode 100644 (file)
index 0000000..07d5636
--- /dev/null
+++ b/progs/clear_cmd.c
@@ -0,0 +1,59 @@
+/****************************************************************************
+ * Copyright (c) 2016 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.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Thomas E. Dickey                                                *
+ ****************************************************************************/
+
+/*
+ * clear.c --  clears the terminal's screen
+ */
+
+#define USE_LIBTINFO
+#include <clear_cmd.h>
+
+MODULE_ID("$Id: clear_cmd.c,v 1.1 2016/10/21 23:37:35 tom Exp $")
+
+static int
+putch(int c)
+{
+    return putchar(c);
+}
+
+int
+clear_cmd(void)
+{
+    char *E3;
+
+    /* Clear the scrollback buffer if possible. */
+    E3 = tigetstr("E3");
+    if (E3)
+       (void) tputs(E3, lines > 0 ? lines : 1, putch);
+
+    return tputs(clear_screen, lines > 0 ? lines : 1, putch);
+}