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- using System;
- using System.IO;
- using System.Reflection;
- using System.Text;
- using log4net;
- namespace OpenSim.Framework.Serialization
- {
-
-
-
- public class TarArchiveReader
- {
-
- public enum TarEntryType
- {
- TYPE_UNKNOWN = 0,
- TYPE_NORMAL_FILE = 1,
- TYPE_HARD_LINK = 2,
- TYPE_SYMBOLIC_LINK = 3,
- TYPE_CHAR_SPECIAL = 4,
- TYPE_BLOCK_SPECIAL = 5,
- TYPE_DIRECTORY = 6,
- TYPE_FIFO = 7,
- TYPE_CONTIGUOUS_FILE = 8,
- }
- protected static ASCIIEncoding m_asciiEncoding = new ASCIIEncoding();
-
-
-
- protected BinaryReader m_br;
-
-
-
- protected static char[] m_nullCharArray = new char[] { '\0' };
-
-
-
- protected static char[] m_spaceCharArray = new char[] { ' ' };
-
-
-
-
- public TarArchiveReader(Stream s)
- {
- m_br = new BinaryReader(s);
- }
-
-
-
-
-
- public byte[] ReadEntry(out string filePath, out TarEntryType entryType)
- {
- filePath = String.Empty;
- entryType = TarEntryType.TYPE_UNKNOWN;
- TarHeader header = ReadHeader();
- if (null == header)
- return null;
- entryType = header.EntryType;
- filePath = header.FilePath;
- return ReadData(header.FileSize);
- }
-
-
-
-
- protected TarHeader ReadHeader()
- {
- byte[] header = m_br.ReadBytes(512);
-
- if (header.Length == 0)
- return null;
-
-
- if (header[0] == 0)
- return null;
- TarHeader tarHeader = new TarHeader();
-
- if (header[156] == (byte)'L')
- {
- int longNameLength = ConvertOctalBytesToDecimal(header, 124, 11);
- tarHeader.FilePath = m_asciiEncoding.GetString(ReadData(longNameLength));
-
- header = m_br.ReadBytes(512);
- }
- else
- {
- tarHeader.FilePath = m_asciiEncoding.GetString(header, 0, 100);
- tarHeader.FilePath = tarHeader.FilePath.Trim(m_nullCharArray);
-
- }
- tarHeader.FileSize = ConvertOctalBytesToDecimal(header, 124, 11);
- switch (header[156])
- {
- case 0:
- tarHeader.EntryType = TarEntryType.TYPE_NORMAL_FILE;
- break;
- case (byte)'0':
- tarHeader.EntryType = TarEntryType.TYPE_NORMAL_FILE;
- break;
- case (byte)'1':
- tarHeader.EntryType = TarEntryType.TYPE_HARD_LINK;
- break;
- case (byte)'2':
- tarHeader.EntryType = TarEntryType.TYPE_SYMBOLIC_LINK;
- break;
- case (byte)'3':
- tarHeader.EntryType = TarEntryType.TYPE_CHAR_SPECIAL;
- break;
- case (byte)'4':
- tarHeader.EntryType = TarEntryType.TYPE_BLOCK_SPECIAL;
- break;
- case (byte)'5':
- tarHeader.EntryType = TarEntryType.TYPE_DIRECTORY;
- break;
- case (byte)'6':
- tarHeader.EntryType = TarEntryType.TYPE_FIFO;
- break;
- case (byte)'7':
- tarHeader.EntryType = TarEntryType.TYPE_CONTIGUOUS_FILE;
- break;
- }
- return tarHeader;
- }
-
-
-
-
-
- protected byte[] ReadData(int fileSize)
- {
- byte[] data = m_br.ReadBytes(fileSize);
-
-
- if (fileSize % 512 != 0)
- {
- int paddingLeft = 512 - (fileSize % 512);
-
- m_br.ReadBytes(paddingLeft);
- }
- return data;
- }
- public void Close()
- {
- m_br.Close();
- }
-
-
-
-
-
- public static int ConvertOctalBytesToDecimal(byte[] bytes, int startIndex, int count)
- {
-
-
- string oString = m_asciiEncoding.GetString(bytes, startIndex, count).TrimStart(m_spaceCharArray);
- int d = 0;
- foreach (char c in oString)
- {
- d <<= 3;
- d |= c - '0';
- }
- return d;
- }
- }
- public class TarHeader
- {
- public string FilePath;
- public int FileSize;
- public TarArchiveReader.TarEntryType EntryType;
- }
- }
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