public PpmdStream(PpmdProperties properties, Stream stream, bool compress)
{
this.properties = properties;
this.stream = stream;
this.compress = compress;
if (properties.Version == PpmdVersion.I1)
{
model = new I1.Model();
if (compress)
model.EncodeStart(properties);
else
model.DecodeStart(stream, properties);
}
if (properties.Version == PpmdVersion.H)
{
modelH = new H.ModelPPM();
if (compress)
throw new NotImplementedException();
else
modelH.decodeInit(stream, properties.ModelOrder, properties.AllocatorSize);
}
if (properties.Version == PpmdVersion.H7z)
{
modelH = new H.ModelPPM();
if (compress)
throw new NotImplementedException();
else
modelH.decodeInit(null, properties.ModelOrder, properties.AllocatorSize);
decoder = new LZMA.RangeCoder.Decoder();
decoder.Init(stream);
}
}
public ZipWriter(Stream destination, CompressionInfo compressionInfo, string zipComment)
: base(ArchiveType.Zip)
{
this.ppmdProperties = new PpmdProperties();
this.entries = new List<ZipCentralDirectoryEntry>();
this.zipComment = zipComment ?? string.Empty;
this.zipCompressionInfo = new ZipCompressionInfo(compressionInfo);
base.InitalizeStream(destination, false);
}
public PpmdStream(PpmdProperties properties, Stream stream, bool compress)
{
this.properties = properties;
this.stream = stream;
this.compress = compress;
if (properties.Version == PpmdVersion.I1)
{
model = new I1.Model();
if (compress)
{
model.EncodeStart(properties);
}
else
{
model.DecodeStart(stream, properties);
}
}
if (properties.Version == PpmdVersion.H)
{
modelH = new H.ModelPPM();
if (compress)
{
throw new NotImplementedException();
}
else
{
modelH.decodeInit(stream, properties.ModelOrder, properties.AllocatorSize);
}
}
if (properties.Version == PpmdVersion.H7z)
{
modelH = new H.ModelPPM();
if (compress)
{
throw new NotImplementedException();
}
else
{
modelH.decodeInit(null, properties.ModelOrder, properties.AllocatorSize);
}
decoder = new LZMA.RangeCoder.Decoder();
decoder.Init(stream);
}
}
private readonly PpmdProperties ppmdProperties; // Caching properties to speed up PPMd.
#endif
public ZipWriter(Stream destination, CompressionInfo compressionInfo, string zipComment, Encoding encoding = null)
: base(ArchiveType.Zip)
{
this.zipComment = zipComment ?? string.Empty;
this.encoding = encoding ?? ArchiveEncoding.Default;
switch (compressionInfo.Type)
{
case CompressionType.None:
{
compression = ZipCompressionMethod.None;
}
break;
case CompressionType.Deflate:
{
compression = ZipCompressionMethod.Deflate;
deflateCompressionLevel = compressionInfo.DeflateCompressionLevel;
}
break;
case CompressionType.BZip2:
{
compression = ZipCompressionMethod.BZip2;
}
break;
#if LZMA
case CompressionType.LZMA:
{
compression = ZipCompressionMethod.LZMA;
}
break;
#endif
#if PPMd
case CompressionType.PPMd:
{
ppmdProperties = new PpmdProperties();
compression = ZipCompressionMethod.PPMd;
}
break;
#endif
default:
throw new InvalidFormatException("Invalid compression method: " + compressionInfo.Type);
}
InitalizeStream(destination, false);
}