internal static unsafe byte *ReadSectorDataPointerFromHandle(IntPtr handle, ulong startSector, ulong numSectors, ulong sectorSize)
{
uint bytesRead;
fixed(byte *data = new byte[sectorSize *numSectors])
{
LARGE_INTEGER li;
li.LowPart = 0;
li.QuadPart = (long)(startSector * sectorSize);
NativeDisk.SetFilePointer(handle, li.LowPart, out li.HighPart, EMoveMethod.Begin);
if (!NativeDisk.ReadFile(handle, new IntPtr(data), (uint)(sectorSize * numSectors), out bytesRead, IntPtr.Zero))
{
var exception = new Win32Exception(Marshal.GetLastWin32Error());
throw new Exception(string.Format("Error occured when trying to read sector data pointer from handle.\nError code: {0}\nMessage: {1}", exception.NativeErrorCode, exception.Message));
}
if (bytesRead < (sectorSize * numSectors))
{
for (uint i = bytesRead; i < (sectorSize * numSectors); i++)
{
data[i] = 0;
}
}
return(data);
}
}
internal static Task <int> ReadSectorDataFromHandleAsync(IntPtr handle, byte[] data, ulong startSector, ulong numSectors, ulong sectorSize)
{
return(Task.Run(() =>
{
uint bytesRead;
LARGE_INTEGER li;
li.LowPart = 0;
li.QuadPart = (long)(startSector * sectorSize);
NativeDisk.SetFilePointer(handle, li.LowPart, out li.HighPart, EMoveMethod.Begin);
if (!NativeDisk.ReadFile(handle, data, (uint)(sectorSize * numSectors), out bytesRead, IntPtr.Zero))
{
var exception = new Win32Exception(Marshal.GetLastWin32Error());
throw new Exception(string.Format("Error occured when trying to read sector data from handle async.\nError code: {0}\nMessage: {1}", exception.NativeErrorCode, exception.Message));
}
if (bytesRead < (sectorSize * numSectors))
{
for (uint i = bytesRead; i < (sectorSize * numSectors); i++)
{
data[i] = 0;
}
}
return (int)bytesRead;
}));
}
