ShellPkg/Library/UefiShellLevel3CommandsLib/Cls.c

   1 /** @file
   2   Main file for attrib shell level 2 function.
   3
   4   Copyright (c) 2015, Hewlett-Packard Development Company, L.P.<BR>
   5   Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved. <BR>
   6   This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include "UefiShellLevel3CommandsLib.h"
  17
  18 /**
  19   Function for 'cls' command.
  20
  21   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  22   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  23 **/
  24 SHELL_STATUS
  25 EFIAPI
  26 ShellCommandRunCls (
  27   IN EFI_HANDLE        ImageHandle,
  28   IN EFI_SYSTEM_TABLE  *SystemTable
  29   )
  30 {
  31   EFI_STATUS    Status;
  32   LIST_ENTRY    *Package;
  33   UINTN         Background;
  34   UINTN         ForeColor;
  35   CHAR16        *ProblemParam;
  36   SHELL_STATUS  ShellStatus;
  37   CONST CHAR16  *Param1;
  38
  39   //
  40   // Initialize variables
  41   //
  42   ShellStatus   = SHELL_SUCCESS;
  43   ProblemParam  = NULL;
  44   Background    = 0;
  45
  46   //
  47   // initialize the shell lib (we must be in non-auto-init...)
  48   //
  49   Status = ShellInitialize();
  50   ASSERT_EFI_ERROR(Status);
  51
  52   //
  53   // parse the command line
  54   //
  55   Status = ShellCommandLineParse (EmptyParamList, &Package, &ProblemParam, TRUE);
  56   if (EFI_ERROR(Status)) {
  57     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
  58       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel3HiiHandle, L"cls", ProblemParam);
  59       FreePool(ProblemParam);
  60       ShellStatus = SHELL_INVALID_PARAMETER;
  61     } else {
  62       ASSERT(FALSE);
  63     }
  64   } else {
  65     //
  66     // check for "-?"
  67     //
  68     if (ShellCommandLineGetFlag(Package, L"-?")) {
  69       ASSERT(FALSE);
  70     } else {
  71       //
  72       // If there are 0 value parameters, clear sceen
  73       //
  74       Param1 = ShellCommandLineGetRawValue(Package, 1);
  75       if (Param1 == NULL) {
  76         //
  77         // clear screen
  78         //
  79         gST->ConOut->ClearScreen (gST->ConOut);
  80       } else if (ShellCommandLineGetCount(Package) > 2) {
  81         ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel3HiiHandle, L"cls");
  82         ShellStatus = SHELL_INVALID_PARAMETER;
  83       } else {
  84         if (ShellStrToUintn(Param1) > 7 || StrLen(Param1) > 1 || !ShellIsDecimalDigitCharacter(*Param1)) {
  85           ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PARAM_INV), gShellLevel3HiiHandle, L"cls", Param1);
  86           ShellStatus = SHELL_INVALID_PARAMETER;
  87         } else {
  88           switch (ShellStrToUintn(Param1)) {
  89             case 0:
  90               Background = EFI_BACKGROUND_BLACK;
  91               break;
  92             case 1:
  93               Background = EFI_BACKGROUND_BLUE;
  94               break;
  95             case 2:
  96               Background = EFI_BACKGROUND_GREEN;
  97               break;
  98             case 3:
  99               Background = EFI_BACKGROUND_CYAN;
 100               break;
 101             case 4:
 102               Background = EFI_BACKGROUND_RED;
 103               break;
 104             case 5:
 105               Background = EFI_BACKGROUND_MAGENTA;
 106               break;
 107             case 6:
 108               Background = EFI_BACKGROUND_BROWN;
 109               break;
 110             case 7:
 111               Background = EFI_BACKGROUND_LIGHTGRAY;
 112               break;
 113           }
 114           ForeColor = (~ShellStrToUintn(Param1)) & 0xF;
 115           Status = gST->ConOut->SetAttribute (gST->ConOut, (ForeColor | Background) & 0x7F );
 116           ASSERT_EFI_ERROR(Status);
 117           Status = gST->ConOut->ClearScreen (gST->ConOut);
 118           ASSERT_EFI_ERROR(Status);
 119         }
 120       }
 121     }
 122   }
 123   //
 124   // free the command line package
 125   //
 126   ShellCommandLineFreeVarList (Package);
 127
 128   //
 129   // return the status
 130   //
 131   return (ShellStatus);
 132 }
 133