updated comments and added string-to-number conversion with return value to indicate success or failure. All parameter checking updated to non-case-sensitive.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11424 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 447 insertions, 57 deletions

diff --git a/ShellPkg/Library/UefiShellLib/UefiShellLib.c b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
index bcb6f2a7e4..ba0395dec2 100644
--- a/ShellPkg/Library/UefiShellLib/UefiShellLib.c
+++ b/ShellPkg/Library/UefiShellLib/UefiShellLib.c
@@ -1,7 +1,7 @@
 /** @file

   Provides interface to shell functionality for shell commands and applications.

 

-  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>

+  Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>

   This program and the accompanying materials

   are licensed and made available under the terms and conditions of the BSD License

   which accompanies this distribution.  The full text of the license may be found at

@@ -14,6 +14,7 @@
 

 #include "UefiShellLib.h"

 #include <ShellBase.h>

+#include <Library/SortLib.h>

 

 #define FIND_XXXXX_FILE_BUFFER_SIZE (SIZE_OF_EFI_FILE_INFO + MAX_FILE_NAME_LEN)

 

@@ -123,7 +124,7 @@ ShellFindSE2 (
     // maybe it's not there???

     //

     if (Status == EFI_BUFFER_TOO_SMALL) {

-      Buffer = (EFI_HANDLE*)AllocatePool(BufferSize);

+      Buffer = (EFI_HANDLE*)AllocateZeroPool(BufferSize);

       ASSERT(Buffer != NULL);

       Status = gBS->LocateHandle (ByProtocol,

                                   &gEfiShellEnvironment2Guid,

@@ -159,12 +160,14 @@ ShellFindSE2 (
   return (Status);

 }

 

-/*/

+/**

   Function to do most of the work of the constructor.  Allows for calling 

   multiple times without complete re-initialization.

 

   @param[in] ImageHandle  A copy of the ImageHandle.

   @param[in] SystemTable  A pointer to the SystemTable for the application.

+

+  @retval EFI_SUCCESS   The operationw as successful.

 **/

 EFI_STATUS

 EFIAPI

@@ -817,7 +820,7 @@ ShellReadFile(
 EFI_STATUS

 EFIAPI

 ShellWriteFile(

-  IN SHELL_FILE_HANDLE                     FileHandle,

+  IN SHELL_FILE_HANDLE          FileHandle,

   IN OUT UINTN                  *BufferSize,

   IN VOID                       *Buffer

   )

@@ -1169,7 +1172,6 @@ ShellSetEnvironmentVariable (
   @retval EFI_OUT_OF_RESOURCES    Out of resources.

   @retval EFI_UNSUPPORTED         The operation is not allowed.

 **/

-

 EFI_STATUS

 EFIAPI

 ShellExecute (

@@ -1770,10 +1772,11 @@ EFIAPI
 InternalIsOnCheckList (

   IN CONST CHAR16               *Name,

   IN CONST SHELL_PARAM_ITEM     *CheckList,

-  OUT SHELL_PARAM_TYPE                 *Type

+  OUT SHELL_PARAM_TYPE          *Type

   )

 {

   SHELL_PARAM_ITEM              *TempListItem;

+  CHAR16                        *TempString;

 

   //

   // ASSERT that all 3 pointer parameters aren't NULL

@@ -1788,6 +1791,7 @@ InternalIsOnCheckList (
   if ((StrCmp(Name, L"-?") == 0) ||

       (StrCmp(Name, L"-b") == 0)

      ) {

+     *Type = TypeFlag;

      return (TRUE);

   }

 

@@ -1799,10 +1803,22 @@ InternalIsOnCheckList (
     // If the Type is TypeStart only check the first characters of the passed in param

     // If it matches set the type and return TRUE

     //

-    if (TempListItem->Type == TypeStart && StrnCmp(Name, TempListItem->Name, StrLen(TempListItem->Name)) == 0) {

-      *Type = TempListItem->Type;

-      return (TRUE);

-    } else if (StrCmp(Name, TempListItem->Name) == 0) {

+    if (TempListItem->Type == TypeStart) { 

+      if (StrnCmp(Name, TempListItem->Name, StrLen(TempListItem->Name)) == 0) {

+        *Type = TempListItem->Type;

+        return (TRUE);

+      }

+      TempString = NULL;

+      TempString = StrnCatGrow(&TempString, NULL, Name, StrLen(TempListItem->Name));

+      if (TempString != NULL) {

+        if (StringNoCaseCompare(&TempString, &TempListItem->Name) == 0) {

+          *Type = TempListItem->Type;

+          FreePool(TempString);

+          return (TRUE);

+        }

+        FreePool(TempString);

+      }

+    } else if (StringNoCaseCompare(&Name, &TempListItem->Name) == 0) {

       *Type = TempListItem->Type;

       return (TRUE);

     }

@@ -1888,11 +1904,12 @@ InternalCommandLineParse (
   )

 {

   UINTN                         LoopCounter;

-  SHELL_PARAM_TYPE                     CurrentItemType;

+  SHELL_PARAM_TYPE              CurrentItemType;

   SHELL_PARAM_PACKAGE           *CurrentItemPackage;

   UINTN                         GetItemValue;

   UINTN                         ValueSize;

   UINTN                         Count;

+  CONST CHAR16                  *TempPointer;

 

   CurrentItemPackage = NULL;

   GetItemValue = 0;

@@ -1938,9 +1955,9 @@ InternalCommandLineParse (
       //

       // this is a flag

       //

-      CurrentItemPackage = AllocatePool(sizeof(SHELL_PARAM_PACKAGE));

+      CurrentItemPackage = AllocateZeroPool(sizeof(SHELL_PARAM_PACKAGE));

       ASSERT(CurrentItemPackage != NULL);

-      CurrentItemPackage->Name  = AllocatePool(StrSize(Argv[LoopCounter]));

+      CurrentItemPackage->Name  = AllocateZeroPool(StrSize(Argv[LoopCounter]));

       ASSERT(CurrentItemPackage->Name != NULL);

       StrCpy(CurrentItemPackage->Name,  Argv[LoopCounter]);

       CurrentItemPackage->Type  = CurrentItemType;

@@ -1996,27 +2013,35 @@ InternalCommandLineParse (
       //

       // add this one as a non-flag

       //

-      CurrentItemPackage = AllocatePool(sizeof(SHELL_PARAM_PACKAGE));

+

+      TempPointer = Argv[LoopCounter];

+      if ((*TempPointer == L'^' && *(TempPointer+1) == L'-') 

+       || (*TempPointer == L'^' && *(TempPointer+1) == L'/')

+       || (*TempPointer == L'^' && *(TempPointer+1) == L'+')

+      ){

+        TempPointer++;

+      }

+      CurrentItemPackage = AllocateZeroPool(sizeof(SHELL_PARAM_PACKAGE));

       ASSERT(CurrentItemPackage != NULL);

       CurrentItemPackage->Name  = NULL;

       CurrentItemPackage->Type  = TypePosition;

-      CurrentItemPackage->Value = AllocatePool(StrSize(Argv[LoopCounter]));

+      CurrentItemPackage->Value = AllocateZeroPool(StrSize(TempPointer));

       ASSERT(CurrentItemPackage->Value != NULL);

-      StrCpy(CurrentItemPackage->Value, Argv[LoopCounter]);

+      StrCpy(CurrentItemPackage->Value, TempPointer);

       CurrentItemPackage->OriginalPosition = Count++;

       InsertHeadList(*CheckPackage, &CurrentItemPackage->Link);

-    } else if (ProblemParam != NULL) {

+    } else {

       //

       // this was a non-recognised flag... error!

       //

-      *ProblemParam = AllocatePool(StrSize(Argv[LoopCounter]));

-      ASSERT(*ProblemParam != NULL);

-      StrCpy(*ProblemParam, Argv[LoopCounter]);

+      if (ProblemParam != NULL) {

+        *ProblemParam = AllocateZeroPool(StrSize(Argv[LoopCounter]));

+        ASSERT(*ProblemParam != NULL);

+        StrCpy(*ProblemParam, Argv[LoopCounter]);      

+      }

       ShellCommandLineFreeVarList(*CheckPackage);

       *CheckPackage = NULL;

       return (EFI_VOLUME_CORRUPTED);

-    } else {

-      //ASSERT(FALSE);

     }

   }

   if (GetItemValue != 0) {

@@ -2183,6 +2208,7 @@ ShellCommandLineGetFlag (
   )

 {

   LIST_ENTRY                    *Node;

+  CHAR16                        *TempString;

 

   //

   // ASSERT that both CheckPackage and KeyString aren't NULL

@@ -2202,7 +2228,7 @@ ShellCommandLineGetFlag (
   for ( Node = GetFirstNode(CheckPackage)

       ; !IsNull (CheckPackage, Node)

       ; Node = GetNextNode(CheckPackage, Node)

-     ){

+      ){

     //

     // If the Name matches, return TRUE (and there may be NULL name)

     //

@@ -2210,11 +2236,20 @@ ShellCommandLineGetFlag (
       //

       // If Type is TypeStart then only compare the begining of the strings

       //

-      if ( ((SHELL_PARAM_PACKAGE*)Node)->Type == TypeStart

-        && StrnCmp(KeyString, ((SHELL_PARAM_PACKAGE*)Node)->Name, StrLen(KeyString)) == 0

-       ){

-        return (TRUE);

-      } else if (StrCmp(KeyString, ((SHELL_PARAM_PACKAGE*)Node)->Name) == 0) {

+      if (((SHELL_PARAM_PACKAGE*)Node)->Type == TypeStart) {

+        if (StrnCmp(KeyString, ((SHELL_PARAM_PACKAGE*)Node)->Name, StrLen(KeyString)) == 0) {

+          return (TRUE);

+        }

+        TempString = NULL;

+        TempString = StrnCatGrow(&TempString, NULL, KeyString, StrLen(((SHELL_PARAM_PACKAGE*)Node)->Name));

+        if (TempString != NULL) {

+          if (StringNoCaseCompare(&KeyString, &((SHELL_PARAM_PACKAGE*)Node)->Name) == 0) {

+            FreePool(TempString);

+            return (TRUE);

+          }

+          FreePool(TempString);

+        }

+      } else if (StringNoCaseCompare(&KeyString, &((SHELL_PARAM_PACKAGE*)Node)->Name) == 0) {

         return (TRUE);

       }

     }

@@ -2242,6 +2277,7 @@ ShellCommandLineGetValue (
   )

 {

   LIST_ENTRY                    *Node;

+  CHAR16                        *TempString;

 

   //

   // check for CheckPackage == NULL

@@ -2256,25 +2292,28 @@ ShellCommandLineGetValue (
   for ( Node = GetFirstNode(CheckPackage)

       ; !IsNull (CheckPackage, Node)

       ; Node = GetNextNode(CheckPackage, Node)

-     ){

+      ){

     //

-    // If the Name matches, return the value (name can be NULL)

+    // If the Name matches, return TRUE (and there may be NULL name)

     //

     if (((SHELL_PARAM_PACKAGE*)Node)->Name != NULL) {

       //

       // If Type is TypeStart then only compare the begining of the strings

       //

-      if ( ((SHELL_PARAM_PACKAGE*)Node)->Type == TypeStart

-        && StrnCmp(KeyString, ((SHELL_PARAM_PACKAGE*)Node)->Name, StrLen(KeyString)) == 0

-       ){

-        //

-        // return the string part after the flag

-        //

-        return (((SHELL_PARAM_PACKAGE*)Node)->Name + StrLen(KeyString));

-      } else if (StrCmp(KeyString, ((SHELL_PARAM_PACKAGE*)Node)->Name) == 0) {

-        //

-        // return the value

-        //

+      if (((SHELL_PARAM_PACKAGE*)Node)->Type == TypeStart) {

+        if (StrnCmp(KeyString, ((SHELL_PARAM_PACKAGE*)Node)->Name, StrLen(KeyString)) == 0) {

+          return (((SHELL_PARAM_PACKAGE*)Node)->Name + StrLen(KeyString));

+        }

+        TempString = NULL;

+        TempString = StrnCatGrow(&TempString, NULL, KeyString, StrLen(((SHELL_PARAM_PACKAGE*)Node)->Name));

+        if (TempString != NULL) {

+          if (StringNoCaseCompare(&KeyString, &((SHELL_PARAM_PACKAGE*)Node)->Name) == 0) {

+            FreePool(TempString);

+            return (((SHELL_PARAM_PACKAGE*)Node)->Name + StrLen(KeyString));

+          }

+          FreePool(TempString);

+        }

+      } else if (StringNoCaseCompare(&KeyString, &((SHELL_PARAM_PACKAGE*)Node)->Name) == 0) {

         return (((SHELL_PARAM_PACKAGE*)Node)->Value);

       }

     }

@@ -2554,8 +2593,8 @@ InternalPrintTo (
 

   Note: The background color is controlled by the shell command cls.

 

-  @param[in] Row        the row to print at

   @param[in] Col        the column to print at

+  @param[in] Row        the row to print at

   @param[in] Format     the format string

   @param[in] Marker     the marker for the variable argument list

 

@@ -2568,7 +2607,7 @@ InternalShellPrintWorker(
   IN INT32                Col OPTIONAL,

   IN INT32                Row OPTIONAL,

   IN CONST CHAR16         *Format,

-  VA_LIST                 Marker

+  IN VA_LIST              Marker

   )

 {

   EFI_STATUS        Status;

@@ -2600,7 +2639,6 @@ InternalShellPrintWorker(
 

   if (Col != -1 && Row != -1) {

     Status = gST->ConOut->SetCursorPosition(gST->ConOut, Col, Row);

-    ASSERT_EFI_ERROR(Status);

   }

 

   FormatWalker = mPostReplaceFormat2;

@@ -2908,13 +2946,15 @@ ShellIsFileInPath(
   FreePool(NewName);

   return (Status);

 }

+

 /**

   Function to determine whether a string is decimal or hex representation of a number

   and return the number converted from the string.

 

   @param[in] String   String representation of a number

 

-  @retval all         the number

+  @return             the number

+  @retval (UINTN)(-1) An error ocurred.

 **/

 UINTN

 EFIAPI

@@ -2922,17 +2962,19 @@ ShellStrToUintn(
   IN CONST CHAR16 *String

   )

 {

-  CONST CHAR16  *Walker;

-  for (Walker = String; Walker != NULL && *Walker != CHAR_NULL && *Walker == L' '; Walker++);

-  if (Walker == NULL || *Walker == CHAR_NULL) {

-    ASSERT(FALSE);

-    return ((UINTN)(-1));

-  } else {

-    if (StrnCmp(Walker, L"0x", 2) == 0 || StrnCmp(Walker, L"0X", 2) == 0){

-      return (StrHexToUintn(Walker));

-    }

-    return (StrDecimalToUintn(Walker));

+  UINT64        RetVal;

+  BOOLEAN       Hex;

+

+  Hex = FALSE;

+

+  if (!InternalShellIsHexOrDecimalNumber(String, Hex, TRUE)) {

+    Hex = TRUE;

   }

+

+  if (!EFI_ERROR(ShellConvertStringToUint64(String, &RetVal, Hex, TRUE))) {

+    return ((UINTN)RetVal);

+  }

+  return ((UINTN)(-1));

 }

 

 /**

@@ -3086,7 +3128,7 @@ ShellPromptForResponse (
   Buffer  = NULL;

   Size    = 0;

   if (Type != ShellPromptResponseTypeFreeform) {

-    Resp = (SHELL_PROMPT_RESPONSE*)AllocatePool(sizeof(SHELL_PROMPT_RESPONSE));

+    Resp = (SHELL_PROMPT_RESPONSE*)AllocateZeroPool(sizeof(SHELL_PROMPT_RESPONSE));

     if (Resp == NULL) {

       return (EFI_OUT_OF_RESOURCES);

     }

@@ -3315,7 +3357,7 @@ ShellPromptForResponseHii (
 **/

 BOOLEAN

 EFIAPI

-ShellIsHexOrDecimalNumber (

+InternalShellIsHexOrDecimalNumber (

   IN CONST CHAR16   *String,

   IN CONST BOOLEAN  ForceHex,

   IN CONST BOOLEAN  StopAtSpace

@@ -3372,6 +3414,7 @@ ShellIsHexOrDecimalNumber (
       }

     }

   }

+

   return (TRUE);

 }

 

@@ -3405,3 +3448,350 @@ ShellFileExists(
 

   return (EFI_SUCCESS);

 }

+

+/**

+  Convert a Unicode character to upper case only if 

+  it maps to a valid small-case ASCII character.

+

+  This internal function only deal with Unicode character

+  which maps to a valid small-case ASCII character, i.e.

+  L'a' to L'z'. For other Unicode character, the input character

+  is returned directly.

+

+  @param  Char  The character to convert.

+

+  @retval LowerCharacter   If the Char is with range L'a' to L'z'.

+  @retval Unchanged        Otherwise.

+

+**/

+CHAR16

+EFIAPI

+InternalShellCharToUpper (

+  IN      CHAR16                    Char

+  )

+{

+  if (Char >= L'a' && Char <= L'z') {

+    return (CHAR16) (Char - (L'a' - L'A'));

+  }

+

+  return Char;

+}

+

+/**

+  Convert a Unicode character to numerical value.

+

+  This internal function only deal with Unicode character

+  which maps to a valid hexadecimal ASII character, i.e.

+  L'0' to L'9', L'a' to L'f' or L'A' to L'F'. For other 

+  Unicode character, the value returned does not make sense.

+

+  @param  Char  The character to convert.

+

+  @return The numerical value converted.

+

+**/

+UINTN

+EFIAPI

+InternalShellHexCharToUintn (

+  IN      CHAR16                    Char

+  )

+{

+  if (ShellIsDecimalDigitCharacter (Char)) {

+    return Char - L'0';

+  }

+

+  return (UINTN) (10 + InternalShellCharToUpper (Char) - L'A');

+}

+

+/**

+  Convert a Null-terminated Unicode hexadecimal string to a value of type UINT64.

+

+  This function returns a value of type UINTN by interpreting the contents

+  of the Unicode string specified by String as a hexadecimal number.

+  The format of the input Unicode string String is:

+

+                  [spaces][zeros][x][hexadecimal digits].

+

+  The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F].

+  The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix.

+  If "x" appears in the input string, it must be prefixed with at least one 0.

+  The function will ignore the pad space, which includes spaces or tab characters,

+  before [zeros], [x] or [hexadecimal digit]. The running zero before [x] or

+  [hexadecimal digit] will be ignored. Then, the decoding starts after [x] or the

+  first valid hexadecimal digit. Then, the function stops at the first character that is

+  a not a valid hexadecimal character or NULL, whichever one comes first.

+

+  If String has only pad spaces, then zero is returned.

+  If String has no leading pad spaces, leading zeros or valid hexadecimal digits,

+  then zero is returned.

+

+  @param[in]  String      A pointer to a Null-terminated Unicode string.

+  @param[out] Value       Upon a successful return the value of the conversion.

+  @param[in] StopAtSpace  FALSE to skip spaces.

+

+  @retval EFI_SUCCESS             The conversion was successful.

+  @retval EFI_INVALID_PARAMETER   A parameter was NULL or invalid.

+  @retval EFI_DEVICE_ERROR        An overflow occured.

+**/

+EFI_STATUS

+EFIAPI

+InternalShellStrHexToUint64 (

+  IN CONST CHAR16   *String,

+     OUT   UINT64   *Value,

+  IN CONST BOOLEAN  StopAtSpace

+  )

+{

+  UINT64    Result;

+

+  if (String == NULL || StrSize(String) == 0 || Value == NULL) {

+    return (EFI_INVALID_PARAMETER);

+  }

+  

+  //

+  // Ignore the pad spaces (space or tab) 

+  //

+  while ((*String == L' ') || (*String == L'\t')) {

+    String++;

+  }

+

+  //

+  // Ignore leading Zeros after the spaces

+  //

+  while (*String == L'0') {

+    String++;

+  }

+

+  if (InternalShellCharToUpper (*String) == L'X') {

+    if (*(String - 1) != L'0') {

+      return 0;

+    }

+    //

+    // Skip the 'X'

+    //

+    String++;

+  }

+

+  Result = 0;

+  

+  //

+  // Skip spaces if requested

+  //

+  while (StopAtSpace && *String == L' ') {

+    String++;

+  }

+  

+  while (ShellIsHexaDecimalDigitCharacter (*String)) {

+    //

+    // If the Hex Number represented by String overflows according 

+    // to the range defined by UINTN, then ASSERT().

+    //

+    if (!(Result <= (RShiftU64((((UINT64) ~0) - InternalShellHexCharToUintn (*String)), 4)))) {

+//    if (!(Result <= ((((UINT64) ~0) - InternalShellHexCharToUintn (*String)) >> 4))) {

+      return (EFI_DEVICE_ERROR);

+    }

+

+    Result = (LShiftU64(Result, 4));

+    Result += InternalShellHexCharToUintn (*String);

+    String++;

+

+    //

+    // Skip spaces if requested

+    //

+    while (StopAtSpace && *String == L' ') {

+      String++;

+    }

+  }

+

+  *Value = Result;

+  return (EFI_SUCCESS);

+}

+

+/**

+  Convert a Null-terminated Unicode decimal string to a value of

+  type UINT64.

+

+  This function returns a value of type UINT64 by interpreting the contents

+  of the Unicode string specified by String as a decimal number. The format

+  of the input Unicode string String is:

+

+                  [spaces] [decimal digits].

+

+  The valid decimal digit character is in the range [0-9]. The

+  function will ignore the pad space, which includes spaces or

+  tab characters, before [decimal digits]. The running zero in the

+  beginning of [decimal digits] will be ignored. Then, the function

+  stops at the first character that is a not a valid decimal character

+  or a Null-terminator, whichever one comes first.

+

+  If String has only pad spaces, then 0 is returned.

+  If String has no pad spaces or valid decimal digits,

+  then 0 is returned.

+

+  @param[in]  String      A pointer to a Null-terminated Unicode string.

+  @param[out] Value       Upon a successful return the value of the conversion.

+  @param[in] StopAtSpace  FALSE to skip spaces.

+

+  @retval EFI_SUCCESS             The conversion was successful.

+  @retval EFI_INVALID_PARAMETER   A parameter was NULL or invalid.

+  @retval EFI_DEVICE_ERROR        An overflow occured.

+**/

+EFI_STATUS

+EFIAPI

+InternalShellStrDecimalToUint64 (

+  IN CONST CHAR16 *String,

+     OUT   UINT64 *Value,

+  IN CONST BOOLEAN  StopAtSpace

+  )

+{

+  UINT64     Result;

+

+  if (String == NULL || StrSize (String) == 0 || Value == NULL) {

+    return (EFI_INVALID_PARAMETER);

+  }

+

+  //

+  // Ignore the pad spaces (space or tab)

+  //

+  while ((*String == L' ') || (*String == L'\t')) {

+    String++;

+  }

+

+  //

+  // Ignore leading Zeros after the spaces

+  //

+  while (*String == L'0') {

+    String++;

+  }

+

+  Result = 0;

+

+  //

+  // Skip spaces if requested

+  //

+  while (StopAtSpace && *String == L' ') {

+    String++;

+  }

+  while (ShellIsDecimalDigitCharacter (*String)) {

+    //

+    // If the number represented by String overflows according 

+    // to the range defined by UINT64, then ASSERT().

+    //

+    

+    if (!(Result <= (DivU64x32((((UINT64) ~0) - (*String - L'0')),10)))) {

+      return (EFI_DEVICE_ERROR);

+    }

+

+    Result = MultU64x32(Result, 10) + (*String - L'0');

+    String++;

+

+    //

+    // Stop at spaces if requested

+    //

+    if (StopAtSpace && *String == L' ') {

+      break;

+    }

+  }

+

+  *Value = Result;

+  

+  return (EFI_SUCCESS);

+}

+

+/**

+  Function to verify and convert a string to its numerical value.

+

+  If Hex it must be preceeded with a 0x, 0X, or has ForceHex set TRUE.

+

+  @param[in] String       The string to evaluate.

+  @param[out] Value       Upon a successful return the value of the conversion.

+  @param[in] ForceHex     TRUE - always assume hex.

+  @param[in] StopAtSpace  FALSE to skip spaces.

+  

+  @retval EFI_SUCCESS             The conversion was successful.

+  @retval EFI_INVALID_PARAMETER   String contained an invalid character.

+  @retval EFI_NOT_FOUND           String was a number, but Value was NULL.

+**/

+EFI_STATUS

+EFIAPI

+ShellConvertStringToUint64(

+  IN CONST CHAR16   *String,

+     OUT   UINT64   *Value,

+  IN CONST BOOLEAN  ForceHex,

+  IN CONST BOOLEAN  StopAtSpace

+  )

+{

+  UINT64        RetVal;

+  CONST CHAR16  *Walker;

+  EFI_STATUS    Status;

+  BOOLEAN       Hex;

+

+  Hex = ForceHex;

+

+  if (!InternalShellIsHexOrDecimalNumber(String, Hex, StopAtSpace)) {

+    if (!Hex) {

+      Hex = TRUE;

+      if (!InternalShellIsHexOrDecimalNumber(String, Hex, StopAtSpace)) {

+        return (EFI_INVALID_PARAMETER);

+      }

+    } else {

+      return (EFI_INVALID_PARAMETER);

+    }

+  }

+

+  //

+  // Chop off leading spaces

+  //

+  for (Walker = String; Walker != NULL && *Walker != CHAR_NULL && *Walker == L' '; Walker++);

+

+  //

+  // make sure we have something left that is numeric.

+  //

+  if (Walker == NULL || *Walker == CHAR_NULL || !InternalShellIsHexOrDecimalNumber(Walker, Hex, StopAtSpace)) {

+    return (EFI_INVALID_PARAMETER);

+  } 

+

+  //

+  // do the conversion.

+  //

+  if (Hex || StrnCmp(Walker, L"0x", 2) == 0 || StrnCmp(Walker, L"0X", 2) == 0){

+    Status = InternalShellStrHexToUint64(Walker, &RetVal, StopAtSpace);

+  } else {

+    Status = InternalShellStrDecimalToUint64(Walker, &RetVal, StopAtSpace);

+  }

+

+  if (Value == NULL && !EFI_ERROR(Status)) {

+    return (EFI_NOT_FOUND);

+  }

+

+  if (Value != NULL) {

+    *Value = RetVal;

+  }

+

+  return (Status);

+}

+

+/**

+  Function to determin if an entire string is a valid number.

+

+  If Hex it must be preceeded with a 0x or has ForceHex, set TRUE.

+

+  @param[in] String       The string to evaluate.

+  @param[in] ForceHex     TRUE - always assume hex.

+  @param[in] StopAtSpace  TRUE to halt upon finding a space, FALSE to keep going.

+

+  @retval TRUE        It is all numeric (dec/hex) characters.

+  @retval FALSE       There is a non-numeric character.

+**/

+BOOLEAN

+EFIAPI

+ShellIsHexOrDecimalNumber (

+  IN CONST CHAR16   *String,

+  IN CONST BOOLEAN  ForceHex,

+  IN CONST BOOLEAN  StopAtSpace

+  )

+{

+  if (ShellConvertStringToUint64(String, NULL, ForceHex, StopAtSpace) == EFI_NOT_FOUND) {

+    return (TRUE);

+  }

+  return (FALSE);

+}