ShellPkg/Library/UefiShellLevel1CommandsLib/For.c

   1 /** @file
   2   Main file for endfor and for shell level 1 functions.
   3
   4   Copyright (c) 2009 - 2012, 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 #include <Library/PrintLib.h>
  17
  18 /**
  19   Determine if a valid string is a valid number for the 'for' command.
  20
  21   @param[in] Number The pointer to the string representation of the number to test.
  22
  23   @retval TRUE    The number is valid.
  24   @retval FALSE   The number is not valid.
  25 **/
  26 BOOLEAN
  27 EFIAPI
  28 ShellIsValidForNumber (
  29   IN CONST CHAR16 *Number
  30   )
  31 {
  32   if (Number == NULL || *Number == CHAR_NULL) {
  33     return (FALSE);
  34   }
  35
  36   if (*Number == L'-') {
  37     Number++;
  38   }
  39
  40   if (StrLen(Number) == 0) {
  41     return (FALSE);
  42   }
  43
  44   if (StrLen(Number) >= 7) {
  45     if ((StrStr(Number, L" ") == NULL) || (((StrStr(Number, L" ") != NULL) && (StrStr(Number, L" ") - Number) >= 7))) {
  46       return (FALSE);
  47     }
  48   }
  49
  50   if (!ShellIsDecimalDigitCharacter(*Number)) {
  51     return (FALSE);
  52   }
  53
  54   return (TRUE);
  55 }
  56
  57 /**
  58   Function for 'endfor' command.
  59
  60   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
  61   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
  62 **/
  63 SHELL_STATUS
  64 EFIAPI
  65 ShellCommandRunEndFor (
  66   IN EFI_HANDLE        ImageHandle,
  67   IN EFI_SYSTEM_TABLE  *SystemTable
  68   )
  69 {
  70   EFI_STATUS          Status;
  71   BOOLEAN             Found;
  72   SCRIPT_FILE         *CurrentScriptFile;
  73
  74   Status = CommandInit();
  75   ASSERT_EFI_ERROR(Status);
  76
  77   if (!gEfiShellProtocol->BatchIsActive()) {
  78     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_NO_SCRIPT), gShellLevel1HiiHandle, L"EndFor");
  79     return (SHELL_UNSUPPORTED);
  80   }
  81
  82   if (gEfiShellParametersProtocol->Argc > 1) {
  83     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellLevel1HiiHandle);
  84     return (SHELL_INVALID_PARAMETER);
  85   }
  86
  87   Found = MoveToTag(GetPreviousNode, L"for", L"endfor", NULL, ShellCommandGetCurrentScriptFile(), FALSE, FALSE, FALSE);
  88
  89   if (!Found) {
  90     CurrentScriptFile = ShellCommandGetCurrentScriptFile();
  91     ShellPrintHiiEx(
  92       -1,
  93       -1,
  94       NULL,
  95       STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
  96       gShellLevel1HiiHandle,
  97       L"For",
  98       L"EndFor",
  99       CurrentScriptFile!=NULL
 100         && CurrentScriptFile->CurrentCommand!=NULL
 101           ? CurrentScriptFile->CurrentCommand->Line:0);
 102     return (SHELL_NOT_FOUND);
 103   }
 104   return (SHELL_SUCCESS);
 105 }
 106
 107 typedef struct {
 108   UINT32          Signature;
 109   INTN            Current;
 110   INTN            End;
 111   INTN            Step;
 112   CHAR16          *ReplacementName;
 113   CHAR16          *CurrentValue;
 114   BOOLEAN         RemoveSubstAlias;
 115   CHAR16          Set[1];
 116   } SHELL_FOR_INFO;
 117 #define SIZE_OF_SHELL_FOR_INFO OFFSET_OF (SHELL_FOR_INFO, Set)
 118 #define SHELL_FOR_INFO_SIGNATURE SIGNATURE_32 ('S', 'F', 'I', 's')
 119
 120 /**
 121   Update the value of a given alias on the list.  If the alias is not there then add it.
 122
 123   @param[in] Alias               The alias to test for.
 124   @param[in] CommandString       The updated command string.
 125   @param[in, out] List           The list to search.
 126
 127   @retval EFI_SUCCESS           The operation was completed successfully.
 128   @retval EFI_OUT_OF_RESOURCES  There was not enough free memory.
 129 **/
 130 EFI_STATUS
 131 EFIAPI
 132 InternalUpdateAliasOnList(
 133   IN CONST CHAR16       *Alias,
 134   IN CONST CHAR16       *CommandString,
 135   IN OUT LIST_ENTRY     *List
 136   )
 137 {
 138   ALIAS_LIST *Node;
 139   BOOLEAN    Found;
 140
 141   //
 142   // assert for NULL parameter
 143   //
 144   ASSERT(Alias != NULL);
 145
 146   //
 147   // check for the Alias
 148   //
 149   for ( Node = (ALIAS_LIST *)GetFirstNode(List), Found = FALSE
 150       ; !IsNull(List, &Node->Link)
 151       ; Node = (ALIAS_LIST *)GetNextNode(List, &Node->Link)
 152      ){
 153     ASSERT(Node->CommandString != NULL);
 154     ASSERT(Node->Alias != NULL);
 155     if (StrCmp(Node->Alias, Alias)==0) {
 156       FreePool(Node->CommandString);
 157       Node->CommandString = NULL;
 158       Node->CommandString = StrnCatGrow(&Node->CommandString, NULL, CommandString, 0);
 159       Found = TRUE;
 160       break;
 161     }
 162   }
 163   if (!Found) {
 164     Node = AllocateZeroPool(sizeof(ALIAS_LIST));
 165     if (Node == NULL) {
 166       return (EFI_OUT_OF_RESOURCES);
 167     }
 168     ASSERT(Node->Alias == NULL);
 169     Node->Alias         = StrnCatGrow(&Node->Alias, NULL, Alias, 0);
 170     ASSERT(Node->CommandString == NULL);
 171     Node->CommandString = StrnCatGrow(&Node->CommandString, NULL, CommandString, 0);
 172     InsertTailList(List, &Node->Link);
 173   }
 174   return (EFI_SUCCESS);
 175 }
 176
 177 /**
 178   Find out if an alias is on the given list.
 179
 180   @param[in] Alias              The alias to test for.
 181   @param[in] List               The list to search.
 182
 183   @retval TRUE                  The alias is on the list.
 184   @retval FALSE                 The alias is not on the list.
 185 **/
 186 BOOLEAN
 187 EFIAPI
 188 InternalIsAliasOnList(
 189   IN CONST CHAR16       *Alias,
 190   IN CONST LIST_ENTRY   *List
 191   )
 192 {
 193   ALIAS_LIST *Node;
 194
 195   //
 196   // assert for NULL parameter
 197   //
 198   ASSERT(Alias != NULL);
 199
 200   //
 201   // check for the Alias
 202   //
 203   for ( Node = (ALIAS_LIST *)GetFirstNode(List)
 204       ; !IsNull(List, &Node->Link)
 205       ; Node = (ALIAS_LIST *)GetNextNode(List, &Node->Link)
 206      ){
 207     ASSERT(Node->CommandString != NULL);
 208     ASSERT(Node->Alias != NULL);
 209     if (StrCmp(Node->Alias, Alias)==0) {
 210       return (TRUE);
 211     }
 212   }
 213   return (FALSE);
 214 }
 215
 216 /**
 217   Remove an alias from the given list.
 218
 219   @param[in] Alias               The alias to remove.
 220   @param[in, out] List           The list to search.
 221 **/
 222 BOOLEAN
 223 EFIAPI
 224 InternalRemoveAliasFromList(
 225   IN CONST CHAR16       *Alias,
 226   IN OUT LIST_ENTRY     *List
 227   )
 228 {
 229   ALIAS_LIST *Node;
 230
 231   //
 232   // assert for NULL parameter
 233   //
 234   ASSERT(Alias != NULL);
 235
 236   //
 237   // check for the Alias
 238   //
 239   for ( Node = (ALIAS_LIST *)GetFirstNode(List)
 240       ; !IsNull(List, &Node->Link)
 241       ; Node = (ALIAS_LIST *)GetNextNode(List, &Node->Link)
 242      ){
 243     ASSERT(Node->CommandString != NULL);
 244     ASSERT(Node->Alias != NULL);
 245     if (StrCmp(Node->Alias, Alias)==0) {
 246       RemoveEntryList(&Node->Link);
 247       FreePool(Node->Alias);
 248       FreePool(Node->CommandString);
 249       FreePool(Node);
 250       return (TRUE);
 251     }
 252   }
 253   return (FALSE);
 254 }
 255
 256 /**
 257   Function to determine whether a string is decimal or hex representation of a number
 258   and return the number converted from the string.
 259
 260   @param[in] String   String representation of a number
 261
 262   @return             the number
 263   @retval (UINTN)(-1) An error ocurred.
 264 **/
 265 UINTN
 266 EFIAPI
 267 ReturnUintn(
 268   IN CONST CHAR16 *String
 269   )
 270 {
 271   UINT64        RetVal;
 272
 273   if (!EFI_ERROR(ShellConvertStringToUint64(String, &RetVal, FALSE, TRUE))) {
 274     return ((UINTN)RetVal);
 275   }
 276   return ((UINTN)(-1));
 277 }
 278
 279 /**
 280   Function for 'for' command.
 281
 282   @param[in] ImageHandle  Handle to the Image (NULL if Internal).
 283   @param[in] SystemTable  Pointer to the System Table (NULL if Internal).
 284 **/
 285 SHELL_STATUS
 286 EFIAPI
 287 ShellCommandRunFor (
 288   IN EFI_HANDLE        ImageHandle,
 289   IN EFI_SYSTEM_TABLE  *SystemTable
 290   )
 291 {
 292   EFI_STATUS          Status;
 293   SHELL_STATUS        ShellStatus;
 294   SCRIPT_FILE         *CurrentScriptFile;
 295   CHAR16              *ArgSet;
 296   CHAR16              *ArgSetWalker;
 297   UINTN               ArgSize;
 298   UINTN               LoopVar;
 299   SHELL_FOR_INFO      *Info;
 300   CHAR16              *TempString;
 301   CHAR16              *TempSpot;
 302   BOOLEAN             FirstPass;
 303   EFI_SHELL_FILE_INFO *Node;
 304   EFI_SHELL_FILE_INFO *FileList;
 305   UINTN               NewSize;
 306
 307   ArgSet              = NULL;
 308   ArgSize             = 0;
 309   ShellStatus         = SHELL_SUCCESS;
 310   ArgSetWalker        = NULL;
 311   TempString          = NULL;
 312   FirstPass           = FALSE;
 313
 314   //
 315   // initialize the shell lib (we must be in non-auto-init...)
 316   //
 317   Status = ShellInitialize();
 318   ASSERT_EFI_ERROR(Status);
 319
 320   Status = CommandInit();
 321   ASSERT_EFI_ERROR(Status);
 322
 323   if (!gEfiShellProtocol->BatchIsActive()) {
 324     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_NO_SCRIPT), gShellLevel1HiiHandle, L"For");
 325     return (SHELL_UNSUPPORTED);
 326   }
 327
 328   if (gEfiShellParametersProtocol->Argc < 4) {
 329     ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellLevel1HiiHandle);
 330     return (SHELL_INVALID_PARAMETER);
 331   }
 332
 333   CurrentScriptFile = ShellCommandGetCurrentScriptFile();
 334   ASSERT(CurrentScriptFile != NULL);
 335
 336   if (CurrentScriptFile->CurrentCommand->Data == NULL) {
 337     FirstPass = TRUE;
 338
 339     //
 340     // Make sure that an End exists.
 341     //
 342     if (!MoveToTag(GetNextNode, L"endfor", L"for", NULL, CurrentScriptFile, TRUE, TRUE, FALSE)) {
 343       ShellPrintHiiEx(
 344         -1,
 345         -1,
 346         NULL,
 347         STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
 348         gShellLevel1HiiHandle,
 349         L"EndFor",
 350         L"For",
 351         CurrentScriptFile->CurrentCommand!=NULL
 352           ?CurrentScriptFile->CurrentCommand->Line:0);
 353       return (SHELL_DEVICE_ERROR);
 354     }
 355
 356     //
 357     // Process the line.
 358     //
 359     if (gEfiShellParametersProtocol->Argv[1][0] != L'%' || gEfiShellParametersProtocol->Argv[1][2] != CHAR_NULL
 360       ||!((gEfiShellParametersProtocol->Argv[1][1] >= L'a' && gEfiShellParametersProtocol->Argv[1][1] <= L'z')
 361        ||(gEfiShellParametersProtocol->Argv[1][1] >= L'A' && gEfiShellParametersProtocol->Argv[1][1] <= L'Z'))
 362      ) {
 363       ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_INV_VAR), gShellLevel1HiiHandle, gEfiShellParametersProtocol->Argv[1]);
 364       return (SHELL_INVALID_PARAMETER);
 365     }
 366
 367     if (gUnicodeCollation->StriColl(
 368         gUnicodeCollation,
 369         L"in",
 370         gEfiShellParametersProtocol->Argv[2]) == 0) {
 371       for (LoopVar = 0x3 ; LoopVar < gEfiShellParametersProtocol->Argc ; LoopVar++) {
 372         ASSERT((ArgSet == NULL && ArgSize == 0) || (ArgSet != NULL));
 373         ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" \"", 0);
 374         if (StrStr(gEfiShellParametersProtocol->Argv[LoopVar], L"*") != NULL
 375           ||StrStr(gEfiShellParametersProtocol->Argv[LoopVar], L"?") != NULL
 376           ||StrStr(gEfiShellParametersProtocol->Argv[LoopVar], L"[") != NULL
 377           ||StrStr(gEfiShellParametersProtocol->Argv[LoopVar], L"]") != NULL) {
 378           FileList = NULL;
 379           Status = ShellOpenFileMetaArg ((CHAR16*)gEfiShellParametersProtocol->Argv[LoopVar], EFI_FILE_MODE_READ, &FileList);
 380           if (EFI_ERROR(Status) || FileList == NULL || IsListEmpty(&FileList->Link)) {
 381             ArgSet = StrnCatGrow(&ArgSet, &ArgSize, gEfiShellParametersProtocol->Argv[LoopVar], 0);
 382           } else {
 383             for (Node = (EFI_SHELL_FILE_INFO *)GetFirstNode(&FileList->Link)
 384               ;  !IsNull(&FileList->Link, &Node->Link)
 385               ;  Node = (EFI_SHELL_FILE_INFO *)GetNextNode(&FileList->Link, &Node->Link)
 386              ){
 387               ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" \"", 0);
 388               ArgSet = StrnCatGrow(&ArgSet, &ArgSize, Node->FullName, 0);
 389               ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L"\"", 0);
 390             }
 391             ShellCloseFileMetaArg(&FileList);
 392           }
 393         } else {
 394           ArgSet = StrnCatGrow(&ArgSet, &ArgSize, gEfiShellParametersProtocol->Argv[LoopVar], 0);
 395         }
 396         ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L"\"", 0);
 397       }
 398       if (ArgSet == NULL) {
 399         ShellStatus = SHELL_OUT_OF_RESOURCES;
 400       } else {
 401         //
 402         // set up for an 'in' for loop
 403         //
 404         NewSize = StrSize(ArgSet);
 405         NewSize += sizeof(SHELL_FOR_INFO)+StrSize(gEfiShellParametersProtocol->Argv[1]);
 406         Info = AllocateZeroPool(NewSize);
 407         ASSERT(Info != NULL);
 408         Info->Signature = SHELL_FOR_INFO_SIGNATURE;
 409         CopyMem(Info->Set, ArgSet, StrSize(ArgSet));
 410         NewSize = StrSize(gEfiShellParametersProtocol->Argv[1]);
 411         CopyMem(Info->Set+(StrSize(ArgSet)/sizeof(Info->Set[0])), gEfiShellParametersProtocol->Argv[1], NewSize);
 412         Info->ReplacementName = Info->Set+StrSize(ArgSet)/sizeof(Info->Set[0]);
 413         Info->CurrentValue  = (CHAR16*)Info->Set;
 414         Info->Step          = 0;
 415         Info->Current       = 0;
 416         Info->End           = 0;
 417
 418         if (InternalIsAliasOnList(Info->ReplacementName, &CurrentScriptFile->SubstList)) {
 419           Info->RemoveSubstAlias  = FALSE;
 420         } else {
 421           Info->RemoveSubstAlias  = TRUE;
 422         }
 423         CurrentScriptFile->CurrentCommand->Data = Info;
 424       }
 425     } else if (gUnicodeCollation->StriColl(
 426         gUnicodeCollation,
 427         L"run",
 428         gEfiShellParametersProtocol->Argv[2]) == 0) {
 429       for (LoopVar = 0x3 ; LoopVar < gEfiShellParametersProtocol->Argc ; LoopVar++) {
 430         ASSERT((ArgSet == NULL && ArgSize == 0) || (ArgSet != NULL));
 431         if (ArgSet == NULL) {
 432 //        ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L"\"", 0);
 433         } else {
 434           ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" ", 0);
 435         }
 436         ArgSet = StrnCatGrow(&ArgSet, &ArgSize, gEfiShellParametersProtocol->Argv[LoopVar], 0);
 437 //        ArgSet = StrnCatGrow(&ArgSet, &ArgSize, L" ", 0);
 438       }
 439       if (ArgSet == NULL) {
 440         ShellStatus = SHELL_OUT_OF_RESOURCES;
 441       } else {
 442         //
 443         // set up for a 'run' for loop
 444         //
 445         Info = AllocateZeroPool(sizeof(SHELL_FOR_INFO)+StrSize(gEfiShellParametersProtocol->Argv[1]));
 446         ASSERT(Info != NULL);
 447         Info->Signature = SHELL_FOR_INFO_SIGNATURE;
 448         CopyMem(Info->Set, gEfiShellParametersProtocol->Argv[1], StrSize(gEfiShellParametersProtocol->Argv[1]));
 449         Info->ReplacementName = Info->Set;
 450         Info->CurrentValue    = NULL;
 451         ArgSetWalker            = ArgSet;
 452         if (ArgSetWalker[0] != L'(') {
 453           ShellPrintHiiEx(
 454             -1,
 455             -1,
 456             NULL,
 457             STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 458             gShellLevel1HiiHandle,
 459             ArgSet,
 460             CurrentScriptFile!=NULL
 461               && CurrentScriptFile->CurrentCommand!=NULL
 462               ? CurrentScriptFile->CurrentCommand->Line:0);
 463           ShellStatus = SHELL_INVALID_PARAMETER;
 464         } else {
 465           TempSpot = StrStr(ArgSetWalker, L")");
 466           if (TempSpot != NULL) {
 467             TempString = TempSpot+1;
 468             if (*(TempString) != CHAR_NULL) {
 469               while(TempString != NULL && *TempString == L' ') {
 470                 TempString++;
 471               }
 472               if (StrLen(TempString) > 0) {
 473                 TempSpot = NULL;
 474               }
 475             }
 476           }
 477           if (TempSpot == NULL) {
 478             ShellPrintHiiEx(
 479               -1,
 480               -1,
 481               NULL,
 482               STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 483               gShellLevel1HiiHandle,
 484               CurrentScriptFile!=NULL
 485                 && CurrentScriptFile->CurrentCommand!=NULL
 486                 ? CurrentScriptFile->CurrentCommand->Line:0);
 487             ShellStatus = SHELL_INVALID_PARAMETER;
 488           } else {
 489             *TempSpot = CHAR_NULL;
 490             ArgSetWalker++;
 491             while (ArgSetWalker != NULL && ArgSetWalker[0] == L' ') {
 492               ArgSetWalker++;
 493             }
 494             if (!ShellIsValidForNumber(ArgSetWalker)) {
 495               ShellPrintHiiEx(
 496                 -1,
 497                 -1,
 498                 NULL,
 499                 STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 500                 gShellLevel1HiiHandle,
 501                 ArgSet,
 502                 CurrentScriptFile!=NULL
 503                   && CurrentScriptFile->CurrentCommand!=NULL
 504                   ? CurrentScriptFile->CurrentCommand->Line:0);
 505               ShellStatus = SHELL_INVALID_PARAMETER;
 506             } else {
 507               if (ArgSetWalker[0] == L'-') {
 508                 Info->Current = 0 - (INTN)ReturnUintn(ArgSetWalker+1);
 509               } else {
 510                 Info->Current = (INTN)ReturnUintn(ArgSetWalker);
 511               }
 512               ArgSetWalker  = StrStr(ArgSetWalker, L" ");
 513               while (ArgSetWalker != NULL && ArgSetWalker[0] == L' ') {
 514                 ArgSetWalker++;
 515               }
 516               if (ArgSetWalker == NULL || *ArgSetWalker == CHAR_NULL || !ShellIsValidForNumber(ArgSetWalker)){
 517                 ShellPrintHiiEx(
 518                   -1,
 519                   -1,
 520                   NULL,
 521                   STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 522                   gShellLevel1HiiHandle,
 523                   ArgSet,
 524                   CurrentScriptFile!=NULL
 525                     && CurrentScriptFile->CurrentCommand!=NULL
 526                     ? CurrentScriptFile->CurrentCommand->Line:0);
 527                 ShellStatus = SHELL_INVALID_PARAMETER;
 528               } else {
 529                 if (ArgSetWalker[0] == L'-') {
 530                   Info->End = 0 - (INTN)ReturnUintn(ArgSetWalker+1);
 531                 } else {
 532                   Info->End = (INTN)ReturnUintn(ArgSetWalker);
 533                 }
 534                 if (Info->Current < Info->End) {
 535                   Info->Step            = 1;
 536                 } else {
 537                   Info->Step            = -1;
 538                 }
 539
 540                 ArgSetWalker  = StrStr(ArgSetWalker, L" ");
 541                 while (ArgSetWalker != NULL && ArgSetWalker[0] == L' ') {
 542                   ArgSetWalker++;
 543                 }
 544                 if (ArgSetWalker != NULL && *ArgSetWalker != CHAR_NULL) {
 545                   if (ArgSetWalker == NULL || *ArgSetWalker == CHAR_NULL || !ShellIsValidForNumber(ArgSetWalker)){
 546                     ShellPrintHiiEx(
 547                       -1,
 548                       -1,
 549                       NULL,
 550                       STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 551                       gShellLevel1HiiHandle,
 552                       ArgSet,
 553                       CurrentScriptFile!=NULL
 554                         && CurrentScriptFile->CurrentCommand!=NULL
 555                         ? CurrentScriptFile->CurrentCommand->Line:0);
 556                     ShellStatus = SHELL_INVALID_PARAMETER;
 557                   } else {
 558                     if (*ArgSetWalker == L')') {
 559                       ASSERT(Info->Step == 1 || Info->Step == -1);
 560                     } else {
 561                       if (ArgSetWalker[0] == L'-') {
 562                         Info->Step = 0 - (INTN)ReturnUintn(ArgSetWalker+1);
 563                       } else {
 564                         Info->Step = (INTN)ReturnUintn(ArgSetWalker);
 565                       }
 566
 567                       if (StrStr(ArgSetWalker, L" ") != NULL) {
 568                         ShellPrintHiiEx(
 569                           -1,
 570                           -1,
 571                           NULL,
 572                           STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 573                           gShellLevel1HiiHandle,
 574                           ArgSet,
 575                           CurrentScriptFile!=NULL
 576                             && CurrentScriptFile->CurrentCommand!=NULL
 577                             ? CurrentScriptFile->CurrentCommand->Line:0);
 578                         ShellStatus = SHELL_INVALID_PARAMETER;
 579                       }
 580                     }
 581                   }
 582
 583                 }
 584               }
 585             }
 586           }
 587         }
 588         if (ShellStatus == SHELL_SUCCESS) {
 589           if (InternalIsAliasOnList(Info->ReplacementName, &CurrentScriptFile->SubstList)) {
 590             Info->RemoveSubstAlias  = FALSE;
 591           } else {
 592             Info->RemoveSubstAlias  = TRUE;
 593           }
 594         }
 595         if (CurrentScriptFile->CurrentCommand != NULL) {
 596           CurrentScriptFile->CurrentCommand->Data = Info;
 597         }
 598       }
 599     } else {
 600       ShellPrintHiiEx(
 601         -1,
 602         -1,
 603         NULL,
 604         STRING_TOKEN (STR_GEN_PROBLEM_SCRIPT),
 605         gShellLevel1HiiHandle,
 606         ArgSet,
 607         CurrentScriptFile!=NULL
 608           && CurrentScriptFile->CurrentCommand!=NULL
 609           ? CurrentScriptFile->CurrentCommand->Line:0);
 610       ShellStatus = SHELL_INVALID_PARAMETER;
 611     }
 612   } else {
 613     //
 614     // These need to be NULL since they are used to determine if this is the first pass later on...
 615     //
 616     ASSERT(ArgSetWalker == NULL);
 617     ASSERT(ArgSet       == NULL);
 618   }
 619
 620   if (CurrentScriptFile != NULL && CurrentScriptFile->CurrentCommand != NULL) {
 621     Info = (SHELL_FOR_INFO*)CurrentScriptFile->CurrentCommand->Data;
 622     if (CurrentScriptFile->CurrentCommand->Reset) {
 623       Info->CurrentValue  = (CHAR16*)Info->Set;
 624       FirstPass = TRUE;
 625       CurrentScriptFile->CurrentCommand->Reset = FALSE;
 626     }
 627   } else {
 628     ShellStatus = SHELL_UNSUPPORTED;
 629     Info = NULL;
 630   }
 631   if (ShellStatus == SHELL_SUCCESS) {
 632     ASSERT(Info != NULL);
 633     if (Info->Step != 0) {
 634       //
 635       // only advance if not the first pass
 636       //
 637       if (!FirstPass) {
 638         //
 639         // sequence version of for loop...
 640         //
 641         Info->Current += Info->Step;
 642       }
 643
 644       TempString = AllocateZeroPool(50*sizeof(CHAR16));
 645       UnicodeSPrint(TempString, 50*sizeof(CHAR16), L"%d", Info->Current);
 646       InternalUpdateAliasOnList(Info->ReplacementName, TempString, &CurrentScriptFile->SubstList);
 647       FreePool(TempString);
 648
 649       if ((Info->Step > 0 && Info->Current > Info->End) || (Info->Step < 0 && Info->Current < Info->End)) {
 650         CurrentScriptFile->CurrentCommand->Data = NULL;
 651         //
 652         // find the matching endfor (we're done with the loop)
 653         //
 654         if (!MoveToTag(GetNextNode, L"endfor", L"for", NULL, CurrentScriptFile, TRUE, FALSE, FALSE)) {
 655           ShellPrintHiiEx(
 656             -1,
 657             -1,
 658             NULL,
 659             STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
 660             gShellLevel1HiiHandle,
 661             L"EndFor",
 662             L"For",
 663             CurrentScriptFile!=NULL
 664               && CurrentScriptFile->CurrentCommand!=NULL
 665               ? CurrentScriptFile->CurrentCommand->Line:0);
 666           ShellStatus = SHELL_DEVICE_ERROR;
 667         }
 668         if (Info->RemoveSubstAlias) {
 669           //
 670           // remove item from list
 671           //
 672           InternalRemoveAliasFromList(Info->ReplacementName, &CurrentScriptFile->SubstList);
 673         }
 674         FreePool(Info);
 675       }
 676     } else {
 677       //
 678       // Must be in 'in' version of for loop...
 679       //
 680       ASSERT(Info->Set != NULL);
 681       if (Info->CurrentValue != NULL && *Info->CurrentValue != CHAR_NULL) {
 682         if (Info->CurrentValue[0] == L' ') {
 683           Info->CurrentValue++;
 684         }
 685         if (Info->CurrentValue[0] == L'\"') {
 686           Info->CurrentValue++;
 687         }
 688         //
 689         // do the next one of the set
 690         //
 691         ASSERT(TempString == NULL);
 692         TempString = StrnCatGrow(&TempString, NULL, Info->CurrentValue, 0);
 693         if (TempString == NULL) {
 694           ShellStatus = SHELL_OUT_OF_RESOURCES;
 695         } else {
 696           TempSpot   = StrStr(TempString, L"\" \"");
 697           if (TempSpot != NULL) {
 698             *TempSpot = CHAR_NULL;
 699           }
 700           while (TempString[StrLen(TempString)-1] == L'\"') {
 701             TempString[StrLen(TempString)-1] = CHAR_NULL;
 702           }
 703           InternalUpdateAliasOnList(Info->ReplacementName, TempString, &CurrentScriptFile->SubstList);
 704           Info->CurrentValue += StrLen(TempString);
 705
 706           if (Info->CurrentValue[0] == L'\"') {
 707             Info->CurrentValue++;
 708           }
 709           while (Info->CurrentValue[0] == L' ') {
 710             Info->CurrentValue++;
 711           }
 712           if (Info->CurrentValue[0] == L'\"') {
 713             Info->CurrentValue++;
 714           }
 715           FreePool(TempString);
 716         }
 717       } else {
 718         CurrentScriptFile->CurrentCommand->Data = NULL;
 719         //
 720         // find the matching endfor (we're done with the loop)
 721         //
 722         if (!MoveToTag(GetNextNode, L"endfor", L"for", NULL, CurrentScriptFile, TRUE, FALSE, FALSE)) {
 723           ShellPrintHiiEx(
 724             -1,
 725             -1,
 726             NULL,
 727             STRING_TOKEN (STR_SYNTAX_NO_MATCHING),
 728             gShellLevel1HiiHandle,
 729             L"EndFor",
 730             L"For",
 731             CurrentScriptFile!=NULL
 732               && CurrentScriptFile->CurrentCommand!=NULL
 733               ? CurrentScriptFile->CurrentCommand->Line:0);
 734           ShellStatus = SHELL_DEVICE_ERROR;
 735         }
 736         if (Info->RemoveSubstAlias) {
 737           //
 738           // remove item from list
 739           //
 740           InternalRemoveAliasFromList(Info->ReplacementName, &CurrentScriptFile->SubstList);
 741         }
 742         FreePool(Info);
 743       }
 744     }
 745   }
 746   if (ArgSet != NULL) {
 747     FreePool(ArgSet);
 748   }
 749   return (ShellStatus);
 750 }
 751