/// <summary>
/// Set the data from the raw values provided.
/// </summary>
/// <param name="data">The raw data to extract values from.</param>
/// <param name="index">The index to start extracting values from.</param>
/// <param name="count">The number of bytes available.</param>
public void SetData(byte[] data, int index, int count)
{
using (MemoryStream ms = new MemoryStream(data, index, count, false))
using (ZipHelperStream helperStream = new ZipHelperStream(ms))
{
helperStream.ReadLEInt(); // Reserved
while (helperStream.Position < helperStream.Length)
{
int ntfsTag = helperStream.ReadLEShort();
int ntfsLength = helperStream.ReadLEShort();
if (ntfsTag == 1)
{
if (ntfsLength >= 24)
{
long lastModificationTicks = helperStream.ReadLELong();
_lastModificationTime = DateTime.FromFileTime(lastModificationTicks);
long lastAccessTicks = helperStream.ReadLELong();
_lastAccessTime = DateTime.FromFileTime(lastAccessTicks);
long createTimeTicks = helperStream.ReadLELong();
_createTime = DateTime.FromFileTime(createTimeTicks);
}
break;
}
else
{
// An unknown NTFS tag so simply skip it.
helperStream.Seek(ntfsLength, SeekOrigin.Current);
}
}
}
}
/// <summary>
/// Get the binary data representing this instance.
/// </summary>
/// <returns>The raw binary data representing this instance.</returns>
public byte[] GetData()
{
using (MemoryStream ms = new MemoryStream())
using (ZipHelperStream helperStream = new ZipHelperStream(ms))
{
helperStream.IsStreamOwner = false;
helperStream.WriteLEInt(0); // Reserved
helperStream.WriteLEShort(1); // Tag
helperStream.WriteLEShort(24); // Length = 3 x 8.
helperStream.WriteLELong(_lastModificationTime.ToFileTime());
helperStream.WriteLELong(_lastAccessTime.ToFileTime());
helperStream.WriteLELong(_createTime.ToFileTime());
return ms.ToArray();
}
}
/// <summary>
/// Get the binary data representing this instance.
/// </summary>
/// <returns>The raw binary data representing this instance.</returns>
public byte[] GetData()
{
using (MemoryStream ms = new MemoryStream())
using (ZipHelperStream helperStream = new ZipHelperStream(ms))
{
helperStream.IsStreamOwner = false;
helperStream.WriteByte((byte)_flags); // Flags
if ((_flags & Flags.ModificationTime) != 0)
{
TimeSpan span = _modificationTime.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime();
int seconds = (int)span.TotalSeconds;
helperStream.WriteLEInt(seconds);
}
if ((_flags & Flags.AccessTime) != 0)
{
TimeSpan span = _lastAccessTime.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime();
int seconds = (int)span.TotalSeconds;
helperStream.WriteLEInt(seconds);
}
if ((_flags & Flags.CreateTime) != 0)
{
TimeSpan span = _createTime.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime();
int seconds = (int)span.TotalSeconds;
helperStream.WriteLEInt(seconds);
}
return ms.ToArray();
}
}
/// <summary>
/// Set the data from the raw values provided.
/// </summary>
/// <param name="data">The raw data to extract values from.</param>
/// <param name="index">The index to start extracting values from.</param>
/// <param name="count">The number of bytes available.</param>
public void SetData(byte[] data, int index, int count)
{
using (MemoryStream ms = new MemoryStream(data, index, count, false))
using (ZipHelperStream helperStream = new ZipHelperStream(ms))
{
// bit 0 if set, modification time is present
// bit 1 if set, access time is present
// bit 2 if set, creation time is present
_flags = (Flags)helperStream.ReadByte();
if (((_flags & Flags.ModificationTime) != 0) && (count >= 5))
{
int iTime = helperStream.ReadLEInt();
_modificationTime = (new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
}
if ((_flags & Flags.AccessTime) != 0)
{
int iTime = helperStream.ReadLEInt();
_lastAccessTime = (new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
}
if ((_flags & Flags.CreateTime) != 0)
{
int iTime = helperStream.ReadLEInt();
_createTime = (new DateTime(1970, 1, 1, 0, 0, 0).ToUniversalTime() +
new TimeSpan(0, 0, 0, iTime, 0)).ToLocalTime();
}
}
}
/// <summary>
/// Finishes the stream. This will write the central directory at the
/// end of the zip file and flush the stream.
/// </summary>
/// <remarks>
/// This is automatically called when the stream is closed.
/// </remarks>
/// <exception cref="System.IO.IOException">
/// An I/O error occurs.
/// </exception>
/// <exception cref="ZipException">
/// Comment exceeds the maximum length<br/>
/// Entry name exceeds the maximum length
/// </exception>
public override void Finish()
{
if (entries == null)
{
return;
}
if (curEntry != null)
{
CloseEntry();
}
long numEntries = entries.Count;
long sizeEntries = 0;
foreach (ZipEntry entry in entries)
{
WriteLeInt(ZipConstants.CentralHeaderSignature);
WriteLeShort(ZipConstants.VersionMadeBy);
WriteLeShort(entry.Version);
WriteLeShort(entry.Flags);
WriteLeShort((short)entry.CompressionMethodForHeader);
WriteLeInt((int)entry.DosTime);
WriteLeInt((int)entry.Crc);
if (entry.IsZip64Forced() ||
(entry.CompressedSize >= uint.MaxValue))
{
WriteLeInt(-1);
}
else
{
WriteLeInt((int)entry.CompressedSize);
}
if (entry.IsZip64Forced() ||
(entry.Size >= uint.MaxValue))
{
WriteLeInt(-1);
}
else
{
WriteLeInt((int)entry.Size);
}
byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (name.Length > 0xffff)
{
throw new ZipException("Name too long.");
}
ZipExtraData ed = new ZipExtraData(entry.ExtraData);
if (entry.CentralHeaderRequiresZip64)
{
ed.StartNewEntry();
if (entry.IsZip64Forced() ||
(entry.Size >= 0xffffffff))
{
ed.AddLeLong(entry.Size);
}
if (entry.IsZip64Forced() ||
(entry.CompressedSize >= 0xffffffff))
{
ed.AddLeLong(entry.CompressedSize);
}
if (entry.Offset >= 0xffffffff)
{
ed.AddLeLong(entry.Offset);
}
ed.AddNewEntry(1);
}
else
{
ed.Delete(1);
}
#if !NET_1_1 && !NETCF_2_0
if (entry.AESKeySize > 0)
{
AddExtraDataAES(entry, ed);
}
#endif
byte[] extra = ed.GetEntryData();
byte[] entryComment =
(entry.Comment != null) ?
ZipConstants.ConvertToArray(entry.Flags, entry.Comment) :
new byte[0];
if (entryComment.Length > 0xffff)
{
throw new ZipException("Comment too long.");
}
WriteLeShort(name.Length);
WriteLeShort(extra.Length);
WriteLeShort(entryComment.Length);
WriteLeShort(0); // disk number
WriteLeShort(0); // internal file attributes
// external file attributes
if (entry.ExternalFileAttributes != -1)
{
WriteLeInt(entry.ExternalFileAttributes);
}
else
{
if (entry.IsDirectory)
{ // mark entry as directory (from nikolam.AT.perfectinfo.com)
WriteLeInt(16);
}
else
{
WriteLeInt(0);
}
}
if (entry.Offset >= uint.MaxValue)
{
WriteLeInt(-1);
}
else
{
WriteLeInt((int)entry.Offset);
}
if (name.Length > 0)
{
baseOutputStream_.Write(name, 0, name.Length);
}
if (extra.Length > 0)
{
baseOutputStream_.Write(extra, 0, extra.Length);
}
if (entryComment.Length > 0)
{
baseOutputStream_.Write(entryComment, 0, entryComment.Length);
}
sizeEntries += ZipConstants.CentralHeaderBaseSize + name.Length + extra.Length + entryComment.Length;
}
using (ZipHelperStream zhs = new ZipHelperStream(baseOutputStream_))
{
zhs.WriteEndOfCentralDirectory(numEntries, sizeEntries, offset, zipComment);
}
entries = null;
}