RtlCompareUnicodeString

NTSTATUS __stdcall RtlCompareUnicodeString(
        const _UNICODE_STRING *String1,
        const _UNICODE_STRING *String2,
        UINT8 CaseInSensitive){
  UINT16 *Buffer; 
  unsigned __int64 v4; 
  unsigned __int64 v5; 
  unsigned __int64 v6; 
  UINT16 *v7; 
  char *v8; 
  int v10; 
  unsigned __int64 v11; 
  int v12; 
  int v13; 
  char *v14; 

  Buffer = String1->Buffer;
  v4 = (unsigned __int64)String1->Length >> 1;
  v5 = (unsigned __int64)String2->Length >> 1;
  v6 = v4;
  if( v4 > v5 )
    v6 = (unsigned __int64)String2->Length >> 1;
  v7 = &Buffer[v6];
  if( Buffer >= v7 )
    return v4 - v5;
  if( CaseInSensitive )
  {
    v8 = (char *)((char *)String2->Buffer - (char *)Buffer);
    while( 1 )
    {
      if( *Buffer != *(UINT16 *)((char *)Buffer + (_QWORD)v8) )
      {
        v10 = NLS_UPCASE(*Buffer);
        if( (unsigned int)v11 >= 0x61 )
        {
          if( (unsigned int)v11 > 0x7A )
          {
            if( Nls844UnicodeUpcaseTable )
            {
              if( (unsigned __int16)v11 >= 0xC0u )
                LOWORD(v11) = *(_WORD *)(Nls844UnicodeUpcaseTable
                                       + 2
                                       * ((v11 & 0xF)
                                        + *(unsigned __int16 *)(Nls844UnicodeUpcaseTable
                                                              + 2i64
                                                              * (((unsigned __int8)v11 >> 4)
                                                               + (unsigned int)*(unsigned __int16 *)(Nls844UnicodeUpcaseTable + 2 * (v11 >> 8))))))
                            + v11;
            }
          }
          else
          {
            LOWORD(v11) = v11 - 32;
          }
        }
        if( (_WORD)v10 != (_WORD)v11 )
          break;
      }
      if( ++Buffer >= v7 )
        return v4 - v5;
    }
    v12 = (unsigned __int16)v11;
    v13 = v10;
  }
  else
  {
    v14 = (char *)((char *)String2->Buffer - (char *)Buffer);
    while( 1 )
    {
      v13 = *Buffer;
      v12 = *(unsigned __int16 *)((char *)Buffer + (_QWORD)v14);
      if( (_WORD)v13 != (_WORD)v12 )
        break;
      if( ++Buffer >= v7 )
        return v4 - v5;
    }
  }
  return v13 - v12;
}

Referenced by: