ShellPkg/Dp: Add null pointer check

[mirror_edk2.git] / ShellPkg / Library / UefiShellInstall1CommandsLib / UefiShellInstall1CommandsLib.c

/** @file\r
  Main file for NULL named library for install1 shell command functions.\r
\r
  Copyright (c) 2010 - 2011, Intel Corporation. All rights reserved.<BR>\r
  This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include <Library/BcfgCommandLib.h>\r
\r
/**\r
  Constructor for the Shell Level 1 Commands library.\r
\r
  Install the handlers for level 1 UEFI Shell 2.0 commands.\r
\r
  @param ImageHandle    the image handle of the process\r
  @param SystemTable    the EFI System Table pointer\r
\r
  @retval EFI_SUCCESS        the shell command handlers were installed sucessfully\r
  @retval EFI_UNSUPPORTED    the shell level required was not found.\r
**/\r
EFI_STATUS\r
EFIAPI\r
ShellInstall1CommandsLibConstructor (\r
  IN EFI_HANDLE        ImageHandle,\r
  IN EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
{\r
  //\r
  // check our bit of the profiles mask\r
  //\r
  if ((PcdGet8(PcdShellProfileMask) & BIT2) == 0) {\r
    return (EFI_SUCCESS);\r
  }\r
\r
  return (BcfgLibraryRegisterBcfgCommand(ImageHandle, SystemTable, L"Install1"));\r
}\r
\r
/**\r
  Destructor for the library.  free any resources.\r
\r
  @param ImageHandle            The image handle of the process.\r
  @param SystemTable            The EFI System Table pointer.\r
**/\r
EFI_STATUS\r
EFIAPI\r
ShellInstall1CommandsLibDestructor (\r
  IN EFI_HANDLE        ImageHandle,\r
  IN EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
{\r
  return (BcfgLibraryUnregisterBcfgCommand(ImageHandle, SystemTable));\r
}\r