/// <summary>
/// Creates the patch based on the difference between two streams.
/// </summary>
/// <param name="baseStream">The untouched stream.</param>
/// <param name="modStream">The modified stream.</param>
public override sealed void Create(Stream baseStream, Stream modStream)
{
using (HashStream <TPatchAlgorithm> patchHashStream = new HashStream <TPatchAlgorithm>(BaseStream, HashAlgorithm))
using (HashStream <TBaseAlgorithm> baseHashStream = new HashStream <TBaseAlgorithm>(baseStream))
using (HashStream <TModAlgorithm> modHashStream = new HashStream <TModAlgorithm>(modStream))
{
BaseStream = patchHashStream;
patchHashStream.Initialize();
Create(patchHashStream, baseHashStream, modHashStream);
if (!baseHashStream.HasFlushedFinalBlock)
{
baseHashStream.Position = baseHashStream.Length;
baseHashStream.FlushFinalBlock();
}
if (!modHashStream.HasFlushedFinalBlock)
{
modHashStream.Position = modHashStream.Length;
modHashStream.FlushFinalBlock();
}
WriteVerificationFooter(patchHashStream, baseHashStream, modHashStream);
BaseStream = patchHashStream.BaseStream;
}
}
/// <summary>
/// Analyzes the entire patch.
/// </summary>
protected override void Analyze()
{
using (HashStream <TPatchAlgorithm> patchHashStream = new HashStream <TPatchAlgorithm>(BaseStream, HashAlgorithm))
{
BaseStream = patchHashStream;
patchHashStream.Initialize();
base.Analyze();
AnalyzeVerificationFooter(patchHashStream);
if (!patchHashStream.HasFlushedFinalBlock)
{
patchHashStream.FlushFinalBlock();
}
BaseStream = patchHashStream.BaseStream;
}
}
