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
  37   ShellStatus         = SHELL_SUCCESS;
  38   CompareString       = NULL;
  39
  40   //
  41   // initialize the shell lib (we must be in non-auto-init...)
  42   //
  43   Status = ShellInitialize();
  44   ASSERT_EFI_ERROR(Status);
  45
  46   Status = CommandInit();
  47   ASSERT_EFI_ERROR(Status);
  48
  49   if (!gEfiShellProtocol->BatchIsActive()) {
  50     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_NO_SCRIPT), gShellLevel1HiiHandle, L"Goto");
  51     return (SHELL_UNSUPPORTED);
  52   }
  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), gShellLevel1HiiHandle, ProblemParam);
  61       FreePool(ProblemParam);
  62       ShellStatus = SHELL_INVALID_PARAMETER;
  63     } else {
  64       ASSERT(FALSE);
  65     }
  66   } else {
  67     if (ShellCommandLineGetRawValue(Package, 2) != NULL) {
  68       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel1HiiHandle);
  69       ShellStatus = SHELL_INVALID_PARAMETER;
  70     } else if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
  71       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel1HiiHandle);
  72       ShellStatus = SHELL_INVALID_PARAMETER;
  73     } else {
  74       Size = 0;
  75       ASSERT((CompareString == NULL && Size == 0) || (CompareString != NULL));
  76       CompareString = StrnCatGrow(&CompareString, &Size, L":", 0);
  77       CompareString = StrnCatGrow(&CompareString, &Size, ShellCommandLineGetRawValue(Package, 1), 0);
  78       //
  79       // Check forwards and then backwards for a label...
  80       //
  81       if (!MoveToTag(GetNextNode, L"endfor", L"for", CompareString, ShellCommandGetCurrentScriptFile(), FALSE, FALSE, TRUE)) {
  82         ShellPrintHiiEx(
  83           -1,
  84           -1,
  85           NULL,
  86           STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
  87           gShellLevel1HiiHandle,
  88           CompareString,
  89           L"Goto",
  90           ShellCommandGetCurrentScriptFile()!=NULL
  91             &&ShellCommandGetCurrentScriptFile()->CurrentCommand!=NULL
  92               ?ShellCommandGetCurrentScriptFile()->CurrentCommand->Line:0);
  93         ShellStatus = SHELL_NOT_FOUND;
  94       }
  95     FreePool(CompareString);
  96     }
  97     ShellCommandLineFreeVarList (Package);
  98   }
  99
 100   return (ShellStatus);
 101 }
 102