public TarEntry GetNextEntry()
{
if (_hasHitEof)
{
return null;
}
if (_currentEntry != null)
{
SkipToNextEntry();
}
byte[] block = _tarBuffer.ReadBlock();
if (block == null)
{
_hasHitEof = true;
}
else if (TarBuffer.IsEndOfArchiveBlock(block))
{
_hasHitEof = true;
}
if (_hasHitEof)
{
_currentEntry = null;
}
else
{
try
{
TarHeader header = new TarHeader();
header.ParseBuffer(block);
if (!header.IsChecksumValid)
{
throw new TarException("Header checksum is invalid");
}
_entryOffset = 0L;
_entrySize = header.Size;
StringBuilder builder = null;
if (header.TypeFlag == 0x4c)
{
byte[] buffer = new byte[0x200];
long size = _entrySize;
builder = new StringBuilder();
while (size > 0L)
{
int length = Read(buffer, 0, (size > buffer.Length) ? buffer.Length : ((int)size));
if (length == -1)
{
throw new InvalidHeaderException("Failed to read long name entry");
}
builder.Append(TarHeader.ParseName(buffer, 0, length));
size -= length;
}
SkipToNextEntry();
block = _tarBuffer.ReadBlock();
}
else if (header.TypeFlag == 0x67)
{
SkipToNextEntry();
block = _tarBuffer.ReadBlock();
}
else if (header.TypeFlag == 120)
{
SkipToNextEntry();
block = _tarBuffer.ReadBlock();
}
else if (header.TypeFlag == 0x56)
{
SkipToNextEntry();
block = _tarBuffer.ReadBlock();
}
else if (((header.TypeFlag != 0x30) && (header.TypeFlag != 0)) && (header.TypeFlag != 0x35))
{
SkipToNextEntry();
block = _tarBuffer.ReadBlock();
}
if (_entryFactory == null)
{
_currentEntry = new TarEntry(block);
if (builder != null)
{
_currentEntry.Name = builder.ToString();
}
}
else
{
_currentEntry = _entryFactory.CreateEntry(block);
}
_entryOffset = 0L;
_entrySize = _currentEntry.Size;
}
catch (InvalidHeaderException exception)
{
_entrySize = 0L;
_entryOffset = 0L;
_currentEntry = null;
throw new InvalidHeaderException(string.Format("Bad header in record {0} block {1} {2}", _tarBuffer.CurrentRecord, _tarBuffer.CurrentBlock, exception.Message));
}
}
return _currentEntry;
}
public TarEntry(byte[] headerBuffer)
{
_header = new TarHeader();
_header.ParseBuffer(headerBuffer);
}