Bool CloseFile(FileHandle& Handle)
{
HANDLE file=reinterpret_cast<HANDLE>(Handle.GetPointer());
Bool result=static_cast<Bool>(CloseHandle(file) == TRUE);
Handle=FileHandle::Zero();
return result;
}
UInt64 TellFile(const FileHandle& Handle)
{
long hi=0, lo;
lo=SetFilePointer(reinterpret_cast<HANDLE>(Handle.GetPointer()), 0, &hi, FILE_CURRENT);
if (lo!=INVALID_SET_FILE_POINTER)
return (static_cast<UInt64>(hi) << 32) + lo;
else
return 0;
}
UInt64 SeekFile(const FileHandle& Handle, const UInt64 Offset, const SeekOrigin::Type Origin)
{
long hi=static_cast<long>(Offset), lo=Offset>>32;
lo=SetFilePointer(reinterpret_cast<HANDLE>(Handle.GetPointer()), lo, &hi, GetNativeSeekOrigin(Origin));
if (lo!=INVALID_SET_FILE_POINTER)
return (static_cast<UInt64>(hi) << 32) + lo;
else
return 0;
}
Bool WriteFile(const FileHandle& Handle, const UInt8* Buffer, const UInt64 WriteBytes, UInt64& BytesWritten)
{
DWORD lowWriteBytes = 0;
BOOL result = ::WriteFile(reinterpret_cast<HANDLE>(Handle.GetPointer()),
reinterpret_cast<const void*>(Buffer), static_cast<DWORD>(WriteBytes),
reinterpret_cast<DWORD*>(&lowWriteBytes),
reinterpret_cast<LPOVERLAPPED>(0)) == TRUE;
BytesWritten = lowWriteBytes;
return result == TRUE;
}
Bool ReadFile(const FileHandle& Handle, UInt8* Buffer, const UInt64 ReadBytes, UInt64& BytesRead)
{
DWORD lowReadBytes=0;
BOOL result = ::ReadFile(reinterpret_cast<HANDLE>(Handle.GetPointer()),
reinterpret_cast<void*>(Buffer), static_cast<DWORD>(ReadBytes),
reinterpret_cast<DWORD*>(&lowReadBytes),
reinterpret_cast<LPOVERLAPPED>(0)) == TRUE;
BytesRead = lowReadBytes;
return result == TRUE;
}
MemoryMappingHandle MapFileIntoMemory(const FileHandle& Handle)
{
MemoryMappingHandle result;
HANDLE file=CreateFileMapping(reinterpret_cast<HANDLE>(Handle.GetPointer()),
0, PAGE_READWRITE | SEC_RESERVE, 0, 0, 0);
if (file)
{
FileMapping* fileMapping=new FileMapping;
fileMapping->fileMapping=file;
fileMapping->data=MapViewOfFile(file, FILE_MAP_WRITE|FILE_MAP_READ, 0, 0, 0);
result=MemoryMappingHandle::GenerateFromPointer(fileMapping);
}
return result;
}
Bool FlushFile(const FileHandle& Handle)
{
return ::FlushFileBuffers(reinterpret_cast<HANDLE>(Handle.GetPointer())) == TRUE;
}
