OsFile::~OsFile()
{
#ifdef _DEBUG
PerformanceTimer t;
t.start();
#endif
CloseHandle(m_handle);
#ifdef _DEBUG
t.stop();
ms_time+= t.getElapsedTime();
#endif
}
void OsFile::seek(int newFilePosition)
{
#ifdef _DEBUG
PerformanceTimer t;
t.start();
#endif
if (m_offset != newFilePosition)
{
const DWORD result = SetFilePointer(m_handle, newFilePosition, NULL, FILE_BEGIN);
DEBUG_FATAL(static_cast<int>(result) != newFilePosition, ("SetFilePointer failed"));
UNREF(result);
m_offset = newFilePosition;
}
#ifdef _DEBUG
t.stop();
ms_time += t.getElapsedTime();
#endif
}
OsFile *OsFile::open(const char *fileName, bool randomAccess)
{
#ifdef _DEBUG
PerformanceTimer t;
t.start();
#endif
// attempt to open the file
HANDLE handle = CreateFile(fileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | (randomAccess ? FILE_FLAG_RANDOM_ACCESS : 0), NULL);
// check to make sure the file opened sucessfully
if (handle == INVALID_HANDLE_VALUE)
return NULL;
#ifdef _DEBUG
t.stop();
ms_time += t.getElapsedTime();
#endif
return new OsFile(handle);
}
int OsFile::getFileSize(const char *fileName)
{
NOT_NULL(fileName);
#ifdef _DEBUG
PerformanceTimer t;
t.start();
#endif
HANDLE handle = CreateFile(fileName, 0, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (handle == INVALID_HANDLE_VALUE)
return -1;
int const size = GetFileSize(handle, NULL);
CloseHandle(handle);
#ifdef _DEBUG
t.stop();
ms_time += t.getElapsedTime();
#endif
return size;
}
int OsFile::read(void *destinationBuffer, int numberOfBytes)
{
#ifdef _DEBUG
PerformanceTimer t;
t.start();
#endif
DWORD amountReadDword;
BOOL result = ReadFile(m_handle, destinationBuffer, static_cast<uint>(numberOfBytes), &amountReadDword, NULL);
// miles crasher hack
#if 0
FATAL(!result, ("FileStreamerThread::processRead ReadFile failed to read '%d' bytes with error '%d'", static_cast<uint>(numberOfBytes), GetLastError()));
#else
if(!result)
{
if(GetLastError() == 998) // access violation - buffer coming from miles hosed
{
WARNING(true,("FileStreamerThread::processRead ReadFile failed to read '%d' bytes with error '%d'", static_cast<uint>(numberOfBytes), GetLastError()));
return 0;
}
else
{
FATAL(true, ("FileStreamerThread::processRead ReadFile failed to read '%d' bytes with error '%d'", static_cast<uint>(numberOfBytes), GetLastError()));
}
}
#endif
// end miles crasher hack
#ifdef _DEBUG
t.stop();
ms_time += t.getElapsedTime();
#endif
m_offset += static_cast<int>(amountReadDword);
return static_cast<int>(amountReadDword);
}
