ShellPkg/Library/UefiShellLevel1CommandsLib/Goto.c

   1 /** @file
   2   Main file for goto shell level 1 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 "UefiShellLevel1CommandsLib.h"
  16
  17 /**
  18   Function for 'goto' 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 ShellCommandRunGoto (
  26   IN EFI_HANDLE        ImageHandle,
  27   IN EFI_SYSTEM_TABLE  *SystemTable
  28   )
  29 {
  30   EFI_STATUS          Status;
  31   LIST_ENTRY          *Package;
  32   CHAR16              *ProblemParam;
  33   SHELL_STATUS        ShellStatus;
  34   CHAR16              *CompareString;
  35   UINTN               Size;
  36   SCRIPT_FILE         *CurrentScriptFile;
  37
  38   ShellStatus         = SHELL_SUCCESS;
  39   CompareString       = NULL;
  40
  41   //
  42   // initialize the shell lib (we must be in non-auto-init...)
  43   //
  44   Status = ShellInitialize();
  45   ASSERT_EFI_ERROR(Status);
  46
  47   Status = CommandInit();
  48   ASSERT_EFI_ERROR(Status);
  49
  50   if (!gEfiShellProtocol->BatchIsActive()) {
  51     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_NO_SCRIPT), gShellLevel1HiiHandle, L"Goto");
  52     return (SHELL_UNSUPPORTED);
  53   }
  54
  55   //
  56   // parse the command line
  57   //
  58   Status = ShellCommandLineParse (EmptyParamList, &Package, &ProblemParam, TRUE);
  59   if (EFI_ERROR(Status)) {
  60     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
  61       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel1HiiHandle, ProblemParam);
  62       FreePool(ProblemParam);
  63       ShellStatus = SHELL_INVALID_PARAMETER;
  64     } else {
  65       ASSERT(FALSE);
  66     }
  67   } else {
  68     if (ShellCommandLineGetRawValue(Package, 2) != NULL) {
  69       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel1HiiHandle);
  70       ShellStatus = SHELL_INVALID_PARAMETER;
  71     } else if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
  72       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel1HiiHandle);
  73       ShellStatus = SHELL_INVALID_PARAMETER;
  74     } else {
  75       Size = 0;
  76       ASSERT((CompareString == NULL && Size == 0) || (CompareString != NULL));
  77       CompareString = StrnCatGrow(&CompareString, &Size, L":", 0);
  78       CompareString = StrnCatGrow(&CompareString, &Size, ShellCommandLineGetRawValue(Package, 1), 0);
  79       //
  80       // Check forwards and then backwards for a label...
  81       //
  82       if (!MoveToTag(GetNextNode, L"endfor", L"for", CompareString, ShellCommandGetCurrentScriptFile(), FALSE, FALSE, TRUE)) {
  83         CurrentScriptFile = ShellCommandGetCurrentScriptFile();
  84         ShellPrintHiiEx(
  85           -1,
  86           -1,
  87           NULL,
  88           STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
  89           gShellLevel1HiiHandle,
  90           CompareString,
  91           L"Goto",
  92           CurrentScriptFile!=NULL
  93             && CurrentScriptFile->CurrentCommand!=NULL
  94             ? CurrentScriptFile->CurrentCommand->Line:0);
  95         ShellStatus = SHELL_NOT_FOUND;
  96       }
  97     FreePool(CompareString);
  98     }
  99     ShellCommandLineFreeVarList (Package);
 100   }
 101
 102   return (ShellStatus);
 103 }
 104