Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / hci / mucurses / clear.c

diff --git a/qemu/roms/ipxe/src/hci/mucurses/clear.c b/qemu/roms/ipxe/src/hci/mucurses/clear.c
new file mode 100644 (file)
index 0000000..f5e52ca
--- /dev/null
+++ b/qemu/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;
+}