//
// OpenFile
//
// Opens the file ready for streaming
//
HRESULT FileReader::OpenFile()
{
CAutoLockFR rLock (&m_accessLock);
// Is the file already opened
if (m_hFile != INVALID_HANDLE_VALUE)
{
//LogDebug("FileReader::OpenFile() file already open");
return NOERROR;
}
// Has a filename been set yet
if (m_pFileName == NULL)
{
LogDebug("FileReader::OpenFile() no filename");
return ERROR_INVALID_NAME;
}
WCHAR *pFileName = NULL;
DWORD Tmo=14 ;
HANDLE hFileUnbuff = INVALID_HANDLE_VALUE;
//Can be used to open files in random-access mode to workaround SMB caching problems
DWORD accessModeFlags = (m_bUseRandomAccess ? FILE_FLAG_RANDOM_ACCESS : FILE_FLAG_SEQUENTIAL_SCAN);
m_bIsStopping = false;
pFileName = m_pFileName;
//LogDebug("FileReader::OpenFile(), Filename: %ws.", pFileName);
do
{
if (m_bIsStopping)
return E_FAIL;
if (m_bUseDummyWrites) //enable SMB2/SMB3 file existence cache workaround
{
if ((wcsstr(pFileName, L".ts.tsbuffer") != NULL)) //timeshift file only
{
CString tempFileName = pFileName;
int replCount = tempFileName.Replace(L".ts.tsbuffer", randomStrGen(12));
if (replCount > 0)
{
//LogDebug("FileReader::OpenFile(), try to write dummy file to update SMB2 cache - %ws", tempFileName);
hFileUnbuff = ::CreateFileW(tempFileName, // The filename
(DWORD) (GENERIC_READ | GENERIC_WRITE), // File access
(DWORD) (FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE), // Share access
NULL, // Security
(DWORD) CREATE_ALWAYS, // Open flags
(DWORD) (FILE_ATTRIBUTE_NORMAL | FILE_FLAG_DELETE_ON_CLOSE), // More flags
NULL); // Template
if (hFileUnbuff != INVALID_HANDLE_VALUE)
{
char tempData[16] = {0x0,0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xA,0xB,0xC,0xD,0xE,0xF};
DWORD bytesWritten;
::WriteFile(hFileUnbuff, tempData, 16, &bytesWritten, NULL);
::CloseHandle(hFileUnbuff); //File is deleted on CloseHandle since FILE_FLAG_DELETE_ON_CLOSE was used
hFileUnbuff = INVALID_HANDLE_VALUE; // Invalidate the file
//LogDebug("FileReader::OpenFile(), dummy file write %d bytes to %ws", bytesWritten, tempFileName);
}
}
}
}
// do not try to open a tsbuffer file without SHARE_WRITE so skip this try if we have a buffer file
if (wcsstr(pFileName, L".ts.tsbuffer") == NULL) // not tsbuffer files
{
// Try to open the file in read-only mode (should fail for 'live' recordings)
m_hFile = ::CreateFileW(pFileName, // The filename
(DWORD) GENERIC_READ, // File access
(DWORD) FILE_SHARE_READ, // Share access
NULL, // Security
(DWORD) OPEN_EXISTING, // Open flags
(DWORD) accessModeFlags, // More flags
NULL); // Template
if (m_hFile != INVALID_HANDLE_VALUE) break ;
//This is in case file is being recorded to ('live' recordings)
m_hFile = ::CreateFileW(pFileName, // The filename
(DWORD) GENERIC_READ, // File access
(DWORD) (FILE_SHARE_READ | FILE_SHARE_WRITE), // Share access
NULL, // Security
(DWORD) OPEN_EXISTING, // Open flags
(DWORD) accessModeFlags, // More flags
NULL); // Template
if (m_hFile != INVALID_HANDLE_VALUE) break ;
}
else //for tsbuffer files
{
//This is in case file is being recorded to
m_hFile = ::CreateFileW(pFileName, // The filename
(DWORD) GENERIC_READ, // File access
(DWORD) (FILE_SHARE_READ | FILE_SHARE_WRITE), // Share access
NULL, // Security
(DWORD) OPEN_EXISTING, // Open flags
(DWORD) accessModeFlags, // More flags
NULL); // Template
if (m_hFile != INVALID_HANDLE_VALUE) break ;
}
if ((wcsstr(pFileName, L".ts.tsbuffer") != NULL) && (Tmo<10)) //timeshift file only
{
if (m_bUseDummyWrites) //enable SMB2/SMB3 file existence cache workaround
{
//Not succeeded in opening file yet, try WRITE_THROUGH dummy file write
CString tempFileName = pFileName;
int replCount = tempFileName.Replace(L".ts.tsbuffer", randomStrGen(12));
if (replCount > 0)
{
// LogDebug("FileReader::OpenFile(), try to write dummy file to update SMB2 cache - %ws", tempFileName);
hFileUnbuff = ::CreateFileW(tempFileName, // The filename
(DWORD) (GENERIC_READ | GENERIC_WRITE), // File access
(DWORD) (FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE), // Share access
NULL, // Security
(DWORD) CREATE_ALWAYS, // Open flags
(DWORD) (FILE_ATTRIBUTE_NORMAL | FILE_FLAG_DELETE_ON_CLOSE | FILE_FLAG_WRITE_THROUGH), // More flags
NULL); // Template
if (hFileUnbuff != INVALID_HANDLE_VALUE)
{
char tempData[16] = {0x0,0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xA,0xB,0xC,0xD,0xE,0xF};
DWORD bytesWritten;
::WriteFile(hFileUnbuff, tempData, 16, &bytesWritten, NULL);
Sleep(50);
::CloseHandle(hFileUnbuff); //File is deleted on CloseHandle since FILE_FLAG_DELETE_ON_CLOSE was used
hFileUnbuff = INVALID_HANDLE_VALUE; // Invalidate the file
LogDebug("FileReader::OpenFile(), dummy file WRITE_THROUGH write %d bytes to %ws", bytesWritten, tempFileName);
}
}
}
//No luck yet, so try unbuffered open and close (to flush SMB2 cache?),
//then go round loop again to open it properly (hopefully....)
hFileUnbuff = ::CreateFileW(pFileName, // The filename
(DWORD) GENERIC_READ, // File access
(DWORD) (FILE_SHARE_READ | FILE_SHARE_WRITE), // Share access
NULL, // Security
(DWORD) OPEN_EXISTING, // Open flags
(DWORD) FILE_FLAG_NO_BUFFERING, // More flags
NULL); // Template
if (hFileUnbuff != INVALID_HANDLE_VALUE)
{
::CloseHandle(hFileUnbuff);
hFileUnbuff = INVALID_HANDLE_VALUE; // Invalidate the file
}
//LogDebug("FileReader::OpenFile() unbuff, %d tries to open %ws", 15-Tmo, pFileName);
}
Sleep(min((20*(15-Tmo)),250)) ; //wait longer between retries as loop iterations increase
}
while(--Tmo) ;
if (Tmo)
{
if (Tmo<13) // 1 failed + 1 succeded is quasi-normal, more is a bit suspicious ( disk drive too slow or problem ? )
LogDebug("FileReader::OpenFile(), %d tries to succeed opening %ws.", 15-Tmo, pFileName);
}
else
{
HRESULT lastErr = HRESULT_FROM_WIN32(GetLastError());
LogDebug("FileReader::OpenFile(), open file failed. Error 0x%x, %ws, filename = %ws", lastErr, HresultToCString(lastErr), pFileName);
return E_FAIL;
}
//LogDebug("FileReader::OpenFile() handle %i %ws", m_hFile, pFileName );
LARGE_INTEGER li;
li.QuadPart = 0;
::SetFilePointer(m_hFile, li.LowPart, &li.HighPart, FILE_BEGIN);
return S_OK;
} // Open
// Main in-game method for Mastermind.
void mastermind( istream&in, ostream&out)
{
char *number = randomStrGen(5); //call to randomStrGen method with default length 5
//Instructions displayed at the start of the game
//User must type "begin" to start the game
out << "Instructions:" << endl;
out << "Welcome to Mastermind! You are a code breaker whose objective is to crack the secret code ";
out << "created by Dr. Random. The code is comprised of 5 digits where each digit is between 0-6.";
out << "With each guess you make, Dr. Random will respond with helpful clues to aid you in deducing ";
out << "the correct code. Good luck, and let the code breaking begin!" << endl;
out << "\n\nPlease type begin to begin the game!\n";
//Initialization and declaration of variables
string begin;
string guess;
char playagain;
int i=0;
int blackPin=0;
int whitePin=0;
int tries = 0;
int track = 0;
int guesses=0;
char *ARRAY;
ARRAY = new char[5];
in >> begin; //gets uers input for start game
while( begin != "begin")
{
out << "Please type begin to begin the game!\n";
in >> begin;
}
//Checks if user enters begin to start the game
if(begin=="begin")
{
out << "Please enter your first guess: ";
in >> guess;
strcpy(ARRAY, guess.c_str());
//Loop while guesses are still available
while(!in.fail() && guesses < 9)
{
for(int j=0; j < 5; j++)
{
track = 1;
if(ARRAY[j]==number[j])
{
blackPin++;
track = 0;
}
for(int k = 0; k<5; k++)
{
if(ARRAY[k] == number[j] && k != j && track != 0)
{
whitePin++;
track = 0;
}
}
}
if(blackPin==5 && guesses != 9)
{
guesses=10;
whitePin = 0;
tries++;
}
out<<"Correct number and position: " << blackPin << endl;
out <<"Correct number, wrong position: " << whitePin <<endl;
if(blackPin != 5)
{
out << "Please enter your next guess: ";
in >> guess;
tries++;
}
strcpy(ARRAY, guess.c_str());
guesses++;
//if user does guess code
if(blackPin==5)
{
out << "\nGame over!!!"<< endl;
out << "It took you " << tries << " tries to guess the correct combination: ";
for(int i=0; i<5; i++)
{
out << number[i];
}
//if user wants to play again...
out << '\n';
out << "To play again type y, or type n to quit: ";
in >> playagain;
if(playagain == 'y' || playagain == 'Y')
{
//reset guesses and tries
guesses = 0;
tries = 0;
//new random numbers
number = randomStrGen(5);
out << "Please enter your first guess: ";
in >> guess;
strcpy(ARRAY, guess.c_str());
}
