ShellPkg/Library/UefiShellLevel3CommandsLib/Cls.c

   1 /** @file
   2   Main file for attrib shell level 2 function.
   3
   4   Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved. <BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #include "UefiShellLevel3CommandsLib.h"
  16
  17 /**
  18   Function for 'cls' command.
  19
  20   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  21   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  22 **/
  23 SHELL_STATUS
  24 EFIAPI
  25 ShellCommandRunCls (
  26   IN EFI_HANDLE        ImageHandle,
  27   IN EFI_SYSTEM_TABLE  *SystemTable
  28   )
  29 {
  30   EFI_STATUS    Status;
  31   LIST_ENTRY    *Package;
  32   CHAR16        *Message;
  33   UINTN         Background;
  34   UINTN         ForeColor;
  35   CHAR16        *ProblemParam;
  36   SHELL_STATUS  ShellStatus;
  37   CONST CHAR16  *Param1;
  38
  39   ShellStatus   = SHELL_SUCCESS;
  40   ProblemParam  = NULL;
  41   Background    = 0;
  42
  43   //
  44   // Initialize variables
  45   //
  46   Message = NULL;
  47
  48   //
  49   // initialize the shell lib (we must be in non-auto-init...)
  50   //
  51   Status = ShellInitialize();
  52   ASSERT_EFI_ERROR(Status);
  53
  54   //
  55   // parse the command line
  56   //
  57   Status = ShellCommandLineParse (EmptyParamList, &Package, &ProblemParam, TRUE);
  58   if (EFI_ERROR(Status)) {
  59     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
  60       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, ProblemParam);
  61       FreePool(ProblemParam);
  62       ShellStatus = SHELL_INVALID_PARAMETER;
  63     } else {
  64       ASSERT(FALSE);
  65     }
  66   } else {
  67     //
  68     // check for "-?"
  69     //
  70     if (ShellCommandLineGetFlag(Package, L"-?")) {
  71       ASSERT(FALSE);
  72     } else {
  73       //
  74       // If there are 0 value parameters, clear sceen
  75       //
  76       Param1 = ShellCommandLineGetRawValue(Package, 1);
  77       if (Param1 == NULL) {
  78         //
  79         // clear screen
  80         //
  81         gST->ConOut->ClearScreen (gST->ConOut);
  82       } else if (ShellCommandLineGetCount(Package) > 2) {
  83         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel3HiiHandle);
  84         ShellStatus = SHELL_INVALID_PARAMETER;
  85       } else {
  86         if (StrDecimalToUintn(Param1) > 7 || StrLen(Param1) > 1 || !ShellIsDecimalDigitCharacter(*Param1)) {
  87           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, Param1);
  88           ShellStatus = SHELL_INVALID_PARAMETER;
  89         } else {
  90           switch (StrDecimalToUintn(Param1)) {
  91             case 0:
  92               Background = EFI_BACKGROUND_BLACK;
  93               break;
  94             case 1:
  95               Background = EFI_BACKGROUND_BLUE;
  96               break;
  97             case 2:
  98               Background = EFI_BACKGROUND_GREEN;
  99               break;
 100             case 3:
 101               Background = EFI_BACKGROUND_CYAN;
 102               break;
 103             case 4:
 104               Background = EFI_BACKGROUND_RED;
 105               break;
 106             case 5:
 107               Background = EFI_BACKGROUND_MAGENTA;
 108               break;
 109             case 6:
 110               Background = EFI_BACKGROUND_BROWN;
 111               break;
 112             case 7:
 113               Background = EFI_BACKGROUND_LIGHTGRAY;
 114               break;
 115           }
 116           ForeColor = (~StrDecimalToUintn(Param1)) & 0xF;
 117           Status = gST->ConOut->SetAttribute (gST->ConOut, ForeColor | Background);
 118           ASSERT_EFI_ERROR(Status);
 119           Status = gST->ConOut->ClearScreen (gST->ConOut);
 120           ASSERT_EFI_ERROR(Status);
 121         }
 122       }
 123     }
 124   }
 125   //
 126   // free the command line package
 127   //
 128   ShellCommandLineFreeVarList (Package);
 129
 130   //
 131   // return the status
 132   //
 133   return (ShellStatus);
 134 }
 135