1 files changed, 100 insertions, 0 deletions
diff --git a/roms/ipxe/src/hci/mucurses/clear.c b/roms/ipxe/src/hci/mucurses/clear.c
new file mode 100644
index 00000000..f5e52ca2
--- /dev/null
+++ b/roms/ipxe/src/hci/mucurses/clear.c
@@ -0,0 +1,100 @@
+#include <curses.h>
+#include "mucurses.h"
+#include "cursor.h"
+
+/** @file
+ *
+ * MuCurses clearing functions
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+/**
+ * Clear a window to the bottom from current cursor position
+ *
+ * @v *win	subject window
+ * @ret rc	return status code
+ */
+int wclrtobot ( WINDOW *win ) {
+	struct cursor_pos pos;
+
+	_store_curs_pos( win, &pos );
+	do {
+		_wputc( win, ' ', WRAP );
+	} while ( win->curs_y + win->curs_x );
+	_restore_curs_pos( win, &pos );
+
+	return OK;
+}
+
+/**
+ * Clear a window to the end of the current line
+ *
+ * @v *win	subject window
+ * @ret rc	return status code
+ */
+int wclrtoeol ( WINDOW *win ) {
+	struct cursor_pos pos;
+
+	_store_curs_pos( win, &pos );
+	while ( ( win->curs_y - pos.y ) == 0 ) {
+		_wputc( win, ' ', WRAP );
+	}
+	_restore_curs_pos( win, &pos );
+
+	return OK;
+}
+
+/**
+ * Delete character under the cursor in a window
+ *
+ * @v *win	subject window
+ * @ret rc	return status code
+ */
+int wdelch ( WINDOW *win ) {
+	_wputc( win, ' ', NOWRAP );
+	_wcursback( win );
+
+	return OK;
+}
+
+/**
+ * Delete line under a window's cursor
+ *
+ * @v *win	subject window
+ * @ret rc	return status code
+ */
+int wdeleteln ( WINDOW *win ) {
+	struct cursor_pos pos;
+
+	_store_curs_pos( win, &pos );
+	/* let's just set the cursor to the beginning of the line and
+	   let wclrtoeol do the work :) */
+	wmove( win, win->curs_y, 0 );
+	wclrtoeol( win );
+	_restore_curs_pos( win, &pos );
+	return OK;
+}
+
+/**
+ * Completely clear a window
+ *
+ * @v *win	subject window
+ * @ret rc	return status code
+ */
+int werase ( WINDOW *win ) {
+	wmove( win, 0, 0 );
+	wclrtobot( win );
+	return OK;
+}
+
+/**
+ * Completely clear the screen
+ *
+ * @ret rc	return status code
+ */
+int erase ( void ) {
+	stdscr->scr->erase( stdscr->scr, stdscr->attrs );
+	return OK;
+}