1 files changed, 135 insertions, 0 deletions
diff --git a/ShellPkg/Library/UefiShellLevel3CommandsLib/Cls.c b/ShellPkg/Library/UefiShellLevel3CommandsLib/Cls.c
new file mode 100644
index 0000000000..019aaf7231
--- /dev/null
+++ b/ShellPkg/Library/UefiShellLevel3CommandsLib/Cls.c
@@ -0,0 +1,135 @@
+/** @file
+  Main file for attrib shell level 2 function.
+
+  Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved. <BR>
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "UefiShellLevel3CommandsLib.h"
+
+/**
+  Function for 'cls' command.
+
+  @param[in] ImageHandle  Handle to the Image (NULL if Internal).
+  @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
+**/
+SHELL_STATUS
+EFIAPI
+ShellCommandRunCls (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS    Status;
+  LIST_ENTRY    *Package;
+  CHAR16        *Message;
+  UINTN         Background;
+  UINTN         ForeColor;
+  CHAR16        *ProblemParam;
+  SHELL_STATUS  ShellStatus;
+  CONST CHAR16  *Param1;
+
+  ShellStatus   = SHELL_SUCCESS;
+  ProblemParam  = NULL;
+  Background    = 0;
+
+  //
+  // Initialize variables
+  //
+  Message = NULL;
+
+  //
+  // initialize the shell lib (we must be in non-auto-init...)
+  //
+  Status = ShellInitialize();
+  ASSERT_EFI_ERROR(Status);
+
+  //
+  // parse the command line
+  //
+  Status = ShellCommandLineParse (EmptyParamList, &Package, &ProblemParam, TRUE);
+  if (EFI_ERROR(Status)) {
+    if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
+      ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, ProblemParam);
+      FreePool(ProblemParam);
+      ShellStatus = SHELL_INVALID_PARAMETER;
+    } else {
+      ASSERT(FALSE);
+    }
+  } else {
+    //
+    // check for "-?"
+    //
+    if (ShellCommandLineGetFlag(Package, L"-?")) {
+      ASSERT(FALSE);
+    } else {
+      //
+      // If there are 0 value parameters, clear sceen
+      //
+      Param1 = ShellCommandLineGetRawValue(Package, 1);
+      if (Param1 == NULL) {
+        //
+        // clear screen
+        //
+        gST->ConOut->ClearScreen (gST->ConOut);
+      } else if (ShellCommandLineGetCount(Package) > 2) {
+        ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel3HiiHandle);
+        ShellStatus = SHELL_INVALID_PARAMETER;
+      } else {
+        if (StrDecimalToUintn(Param1) > 7 || StrLen(Param1) > 1 || !ShellIsDecimalDigitCharacter(*Param1)) {
+          ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, Param1);
+          ShellStatus = SHELL_INVALID_PARAMETER;
+        } else {
+          switch (StrDecimalToUintn(Param1)) {
+            case 0:
+              Background = EFI_BACKGROUND_BLACK;
+              break;
+            case 1:
+              Background = EFI_BACKGROUND_BLUE;
+              break;
+            case 2:
+              Background = EFI_BACKGROUND_GREEN;
+              break;
+            case 3:
+              Background = EFI_BACKGROUND_CYAN;
+              break;
+            case 4:
+              Background = EFI_BACKGROUND_RED;
+              break;
+            case 5:
+              Background = EFI_BACKGROUND_MAGENTA;
+              break;
+            case 6:
+              Background = EFI_BACKGROUND_BROWN;
+              break;
+            case 7:
+              Background = EFI_BACKGROUND_LIGHTGRAY;
+              break;
+          }
+          ForeColor = (~StrDecimalToUintn(Param1)) & 0xF;
+          Status = gST->ConOut->SetAttribute (gST->ConOut, ForeColor | Background);
+          ASSERT_EFI_ERROR(Status);
+          Status = gST->ConOut->ClearScreen (gST->ConOut);
+          ASSERT_EFI_ERROR(Status);
+        }
+      }
+    }
+  }
+  //
+  // free the command line package
+  //
+  ShellCommandLineFreeVarList (Package);
+
+  //
+  // return the status
+  //
+  return (ShellStatus);
+}
+