(EFI_STRING Request)Extract block name from the array generated by VFR compiler. The name of this array is "Vfr + + BlockName", e.g. "VfrMyIfrNVDataBlockName".

/*The source code is from EFI Dev Kit(EDk).*/

EFI_STATUS

ExtractBlockName (

  IN UINT8                        *Buffer,

  OUT CHAR16                      **BlockName

  )

/*++

  Routine Description:

    Extract block name from the array generated by VFR compiler. The name of

  this array is "Vfr + + BlockName", e.g. "VfrMyIfrNVDataBlockName".

  Format of this array is:

     Array length | 4-bytes

       Offset     | 2-bytes

       Width      | 2-bytes

       Offset     | 2-bytes

       Width      | 2-bytes

       ... ...

  Arguments:

    Buffer                - Array generated by VFR compiler.

    BlockName             - The returned

  Returns:

    EFI_OUT_OF_RESOURCES  - Run out of memory resource.

    EFI_INVALID_PARAMETER - Buffer is NULL or BlockName is NULL.

    EFI_SUCCESS           - Operation successful.

--*/

{

  UINTN       Index;

  UINT32      Length;

  UINT32      BlockNameNumber;

  UINTN       HexStringBufferLen;

  CHAR16      *StringPtr;

  if ((Buffer == NULL) || (BlockName == NULL)) {

    return EFI_INVALID_PARAMETER;

  }

  //

  // Calculate number of Offset/Width pair

  //

  EfiCopyMem (&Length, Buffer, sizeof (UINT32));

  BlockNameNumber = (Length - sizeof (UINT32)) / (sizeof (UINT16) * 2);

  //

  // ::= &OFFSET=1234&WIDTH=1234

  //                 |   8  | 4 |  7   | 4 |

  //

  StringPtr = EfiLibAllocateZeroPool ((BlockNameNumber * (8 + 4 + 7 + 4) + 1) * sizeof (CHAR16));

  *BlockName = StringPtr;

  if (StringPtr == NULL) {

    return EFI_OUT_OF_RESOURCES;

  }

  Buffer += sizeof (UINT32);

  for (Index = 0; Index < BlockNameNumber; Index++) {

    EfiStrCpy (StringPtr, L"&OFFSET=");

    StringPtr += 8;

    HexStringBufferLen = 5;

    BufToHexString (StringPtr, &HexStringBufferLen, Buffer, sizeof (UINT16));

    Buffer += sizeof (UINT16);

    StringPtr += 4;

    EfiStrCpy (StringPtr, L"&WIDTH=");

    StringPtr += 7;

    HexStringBufferLen = 5;

    BufToHexString (StringPtr, &HexStringBufferLen, Buffer, sizeof (UINT16));

    Buffer += sizeof (UINT16);

    StringPtr += 4;

  }

  return EFI_SUCCESS;

}