/// <summary>
/// Private dispose method to release managed/unmanaged objects.
/// If disposing = true clean up managed resources as well as unmanaged resources.
/// If disposing = false only clean up unmanaged resources.
/// </summary>
/// <param name="disposing">Indicates whether or not to dispose managed resources.</param>
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
if (null != this.md5hash)
{
this.md5hash.Dispose();
this.md5hash = null;
}
if (null != this.semaphore)
{
this.semaphore.Dispose();
this.semaphore = null;
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="MD5HashStream"/> class.
/// </summary>
/// <param name="stream">Stream object.</param>
/// <param name="lastTransferOffset">Offset of the transferred bytes.</param>
/// <param name="md5hashCheck">Whether need to calculate MD5Hash.</param>
public MD5HashStream(
Stream stream,
long lastTransferOffset,
bool md5hashCheck)
{
this.stream = stream;
this.md5hashOffset = lastTransferOffset;
if ((0 == this.md5hashOffset) ||
(!md5hashCheck))
{
this.finishedSeparateMd5Calculator = true;
this.succeededSeparateMd5Calculator = true;
}
else
{
this.semaphore = new SemaphoreSlim(1, 1);
}
if (md5hashCheck)
{
this.md5hash = new MD5Wrapper();
}
if ((!this.finishedSeparateMd5Calculator) &&
(!this.stream.CanRead))
{
throw new NotSupportedException(string.Format(
CultureInfo.CurrentCulture,
Resources.StreamMustSupportReadException,
"Stream"));
}
if (!this.stream.CanSeek)
{
canSeek = false;
if (!this.finishedSeparateMd5Calculator)
{
throw new NotSupportedException(string.Format(
CultureInfo.CurrentCulture,
Resources.StreamMustSupportSeekException,
"Stream"));
}
}
}
