ShellPkg/Library/UefiShellLevel1CommandsLib/Goto.c

   1 /** @file
   2   Main file for goto shell level 1 function.
   3
   4   (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
   5   Copyright (c) 2009 - 2010, 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 "UefiShellLevel1CommandsLib.h"
  17
  18 /**
  19   Function for 'goto' 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 ShellCommandRunGoto (
  27   IN EFI_HANDLE        ImageHandle,
  28   IN EFI_SYSTEM_TABLE  *SystemTable
  29   )
  30 {
  31   EFI_STATUS          Status;
  32   LIST_ENTRY          *Package;
  33   CHAR16              *ProblemParam;
  34   SHELL_STATUS        ShellStatus;
  35   CHAR16              *CompareString;
  36   UINTN               Size;
  37   SCRIPT_FILE         *CurrentScriptFile;
  38
  39   ShellStatus         = SHELL_SUCCESS;
  40   CompareString       = NULL;
  41
  42   //
  43   // initialize the shell lib (we must be in non-auto-init...)
  44   //
  45   Status = ShellInitialize();
  46   ASSERT_EFI_ERROR(Status);
  47
  48   Status = CommandInit();
  49   ASSERT_EFI_ERROR(Status);
  50
  51   if (!gEfiShellProtocol->BatchIsActive()) {
  52     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_NO_SCRIPT), gShellLevel1HiiHandle, L"Goto");
  53     return (SHELL_UNSUPPORTED);
  54   }
  55
  56   //
  57   // parse the command line
  58   //
  59   Status = ShellCommandLineParse (EmptyParamList, &Package, &ProblemParam, TRUE);
  60   if (EFI_ERROR(Status)) {
  61     if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
  62       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellLevel1HiiHandle, L"goto", ProblemParam);
  63       FreePool(ProblemParam);
  64       ShellStatus = SHELL_INVALID_PARAMETER;
  65     } else {
  66       ASSERT(FALSE);
  67     }
  68   } else {
  69     if (ShellCommandLineGetRawValue(Package, 2) != NULL) {
  70       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel1HiiHandle, L"goto");
  71       ShellStatus = SHELL_INVALID_PARAMETER;
  72     } else if (ShellCommandLineGetRawValue(Package, 1) == NULL) {
  73       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel1HiiHandle, L"goto");
  74       ShellStatus = SHELL_INVALID_PARAMETER;
  75     } else {
  76       Size = 0;
  77       ASSERT((CompareString == NULL && Size == 0) || (CompareString != NULL));
  78       CompareString = StrnCatGrow(&CompareString, &Size, L":", 0);
  79       CompareString = StrnCatGrow(&CompareString, &Size, ShellCommandLineGetRawValue(Package, 1), 0);
  80       //
  81       // Check forwards and then backwards for a label...
  82       //
  83       if (!MoveToTag(GetNextNode, L"endfor", L"for", CompareString, ShellCommandGetCurrentScriptFile(), FALSE, FALSE, TRUE)) {
  84         CurrentScriptFile = ShellCommandGetCurrentScriptFile();
  85         ShellPrintHiiEx(
  86           -1,
  87           -1,
  88           NULL,
  89           STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
  90           gShellLevel1HiiHandle,
  91           CompareString,
  92           L"Goto",
  93           CurrentScriptFile!=NULL
  94             && CurrentScriptFile->CurrentCommand!=NULL
  95             ? CurrentScriptFile->CurrentCommand->Line:0);
  96         ShellStatus = SHELL_NOT_FOUND;
  97       }
  98     FreePool(CompareString);
  99     }
 100     ShellCommandLineFreeVarList (Package);
 101   }
 102
 103   return (ShellStatus);
 104 }
 105