/// <summary>
/// Constructs a new zip instance.
/// If the file exists and has a non-zero length we read it,
/// otherwise we create a new archive.
/// </summary>
/// <param name="filename">The name of the file to read or write</param>
/// <param name="options">The options passed on the commandline</param>
public FileArchiveZip(string filename, Dictionary <string, string> options)
{
if (string.IsNullOrEmpty(filename) && filename.Trim().Length == 0)
{
throw new ArgumentException("filename");
}
if (File.Exists(filename) && new FileInfo(filename).Length > 0)
{
m_isWriting = false;
m_filename = filename;
}
else
{
var compression = new ZipWriterOptions(CompressionType.Deflate);
compression.CompressionType = DEFAULT_COMPRESSION_METHOD;
compression.DeflateCompressionLevel = DEFAULT_COMPRESSION_LEVEL;
m_usingZip64 = compression.UseZip64 =
options.ContainsKey(COMPRESSION_ZIP64_OPTION)
? Duplicati.Library.Utility.Utility.ParseBoolOption(options, COMPRESSION_ZIP64_OPTION)
: DEFAULT_ZIP64;
string cpmethod;
CompressionType tmptype;
if (options.TryGetValue(COMPRESSION_METHOD_OPTION, out cpmethod) && Enum.TryParse <SharpCompress.Common.CompressionType>(cpmethod, true, out tmptype))
{
compression.CompressionType = tmptype;
}
string cplvl;
int tmplvl;
if (options.TryGetValue(COMPRESSION_LEVEL_OPTION, out cplvl) && int.TryParse(cplvl, out tmplvl))
{
compression.DeflateCompressionLevel = (SharpCompress.Compressors.Deflate.CompressionLevel)Math.Max(Math.Min(9, tmplvl), 0);
}
else if (options.TryGetValue(COMPRESSION_LEVEL_OPTION_ALIAS, out cplvl) && int.TryParse(cplvl, out tmplvl))
{
compression.DeflateCompressionLevel = (SharpCompress.Compressors.Deflate.CompressionLevel)Math.Max(Math.Min(9, tmplvl), 0);
}
m_defaultCompressionLevel = compression.DeflateCompressionLevel;
m_compressionType = compression.CompressionType;
m_isWriting = true;
m_stream = new System.IO.FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.Read);
m_writer = WriterFactory.Open(m_stream, ArchiveType.Zip, compression);
//Size of endheader, taken from SharpCompress ZipWriter
m_flushBufferSize = 8 + 2 + 2 + 4 + 4 + 2 + 0;
}
}
public ZIP(int level)
{
if (level < 0)
{
level = 0;
}
else if (level > 9)
{
level = 9;
}
_compressLevel = (SharpCompress.Compressors.Deflate.CompressionLevel)level;
}
/// <summary>
/// Constructs a new zip instance.
/// Access mode is specified by mode parameter.
/// Note that stream would not be disposed by FileArchiveZip instance so
/// you may reuse it and have to dispose it yourself.
/// </summary>
/// <param name="stream">The stream to read or write depending access mode</param>
/// <param name="mode">The archive acces mode</param>
/// <param name="options">The options passed on the commandline</param>
public FileArchiveZip(Stream stream, ArchiveMode mode, IDictionary <string, string> options)
{
m_stream = stream;
m_mode = mode;
if (mode == ArchiveMode.Write)
{
var compression = new ZipWriterOptions(CompressionType.Deflate);
compression.CompressionType = DEFAULT_COMPRESSION_METHOD;
compression.DeflateCompressionLevel = DEFAULT_COMPRESSION_LEVEL;
m_usingZip64 = compression.UseZip64 =
options.ContainsKey(COMPRESSION_ZIP64_OPTION)
? Duplicati.Library.Utility.Utility.ParseBoolOption(options, COMPRESSION_ZIP64_OPTION)
: DEFAULT_ZIP64;
string cpmethod;
CompressionType tmptype;
if (options.TryGetValue(COMPRESSION_METHOD_OPTION, out cpmethod) && Enum.TryParse <SharpCompress.Common.CompressionType>(cpmethod, true, out tmptype))
{
compression.CompressionType = tmptype;
}
string cplvl;
int tmplvl;
if (options.TryGetValue(COMPRESSION_LEVEL_OPTION, out cplvl) && int.TryParse(cplvl, out tmplvl))
{
compression.DeflateCompressionLevel = (SharpCompress.Compressors.Deflate.CompressionLevel)Math.Max(Math.Min(9, tmplvl), 0);
}
else if (options.TryGetValue(COMPRESSION_LEVEL_OPTION_ALIAS, out cplvl) && int.TryParse(cplvl, out tmplvl))
{
compression.DeflateCompressionLevel = (SharpCompress.Compressors.Deflate.CompressionLevel)Math.Max(Math.Min(9, tmplvl), 0);
}
m_defaultCompressionLevel = compression.DeflateCompressionLevel;
m_compressionType = compression.CompressionType;
m_writer = WriterFactory.Open(m_stream, ArchiveType.Zip, compression);
//Size of endheader, taken from SharpCompress ZipWriter
m_flushBufferSize = 8 + 2 + 2 + 4 + 4 + 2 + 0;
}
}
public ZIP(CompressionLevel level)
{
switch (level)
{
case CompressionLevel.None:
_compressLevel = SharpCompress.Compressors.Deflate.CompressionLevel.None;
break;
case CompressionLevel.Fastest:
_compressLevel = SharpCompress.Compressors.Deflate.CompressionLevel.BestSpeed;
break;
case CompressionLevel.Optimal:
_compressLevel = SharpCompress.Compressors.Deflate.CompressionLevel.Level7;
break;
case CompressionLevel.Slowest:
_compressLevel = SharpCompress.Compressors.Deflate.CompressionLevel.BestCompression;
break;
}
}
