Implement BlClearConsoleLine() routine

xtldr2/console.c

@@ -9,6 +9,34 @@
 #include <xtldr.h>
 
 
+/**
+ * Clears a specified line on the UEFI text console.
+ *
+ * @param LineNo
+ *        Supplies a line number to clear.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+BlClearConsoleLine(IN ULONGLONG LineNo)
+{
+    UINT_PTR Index, ResX, ResY;
+
+    /* Query console mode */
+    BlQueryConsoleMode(&ResX, &ResY);
+
+    /* Set cursor position and clear line */
+    BlSetCursorPosition(0, LineNo);
+    for(Index = 0; Index < ResX; Index++)
+    {
+        /* Clear line */
+        BlConsoleWrite(L" ");
+    }
+}
+
 /**
  * This routine clears the UEFI console screen.
  *

xtldr2/includes/bootman.h

@@ -16,6 +16,10 @@
 typedef VOID (BMPRINTCHAR)(IN USHORT Character);
 
 /* XTLDR routines forward references */
+XTCDECL
+VOID
+BlClearConsoleLine(IN ULONGLONG LineNo);
+
 XTCDECL
 VOID
 BlClearConsoleScreen();

xtldr2/protocol.c

@@ -90,6 +90,7 @@ BlpRegisterXtLoaderProtocol()
     EFI_HANDLE Handle = NULL;
 
     /* Set all routines available via loader protocol */
+    LdrProtocol.Console.ClearLine = BlClearConsoleLine;
     LdrProtocol.Console.ClearScreen = BlClearConsoleScreen;
     LdrProtocol.Console.DisableCursor = BlDisableConsoleCursor;
     LdrProtocol.Console.EnableCursor = BlEnableConsoleCursor;