/**
* Parse an entry's header information from a header buffer.
*
* @param header The tar entry header buffer to get information from.
*/
public void parseTarHeader(byte[] header)
{
int offset = 0;
name = TarUtils.parseName(header, offset, TarConstants.NAMELEN);
offset += TarConstants.NAMELEN;
mode = (int)TarUtils.parseOctal(header, offset, TarConstants.MODELEN);
offset += TarConstants.MODELEN;
userId = (int)TarUtils.parseOctal(header, offset, TarConstants.UIDLEN);
offset += TarConstants.UIDLEN;
groupId = (int)TarUtils.parseOctal(header, offset, TarConstants.GIDLEN);
offset += TarConstants.GIDLEN;
size = TarUtils.parseOctal(header, offset, TarConstants.SIZELEN);
offset += TarConstants.SIZELEN;
modTime = TarUtils.parseOctal(header, offset, TarConstants.MODTIMELEN);
offset += TarConstants.MODTIMELEN;
offset += TarConstants.CHKSUMLEN;
linkFlag = header[offset++];
linkName = TarUtils.parseName(header, offset, TarConstants.NAMELEN);
offset += TarConstants.NAMELEN;
magic = TarUtils.parseName(header, offset, TarConstants.MAGICLEN);
offset += TarConstants.MAGICLEN;
version = TarUtils.parseName(header, offset, TarConstants.VERSIONLEN);
offset += TarConstants.VERSIONLEN;
userName = TarUtils.parseName(header, offset, TarConstants.UNAMELEN);
offset += TarConstants.UNAMELEN;
groupName = TarUtils.parseName(header, offset, TarConstants.GNAMELEN);
offset += TarConstants.GNAMELEN;
devMajor = (int)TarUtils.parseOctal(header, offset, TarConstants.DEVLEN);
offset += TarConstants.DEVLEN;
devMinor = (int)TarUtils.parseOctal(header, offset, TarConstants.DEVLEN);
offset += TarConstants.DEVLEN;
String prefix = TarUtils.parseName(header, offset, TarConstants.PREFIXLEN);
// SunOS tar -E does not add / to directory names, so fix up to be consistent
if (isDirectory() && !name.EndsWith("/"))
{
name = name + "/";
}
if (prefix.length() > 0)
{
name = prefix + "/" + name;
}
}
/**
* Write an entry's header information to a header buffer.
*
* @param outbuf The tar entry header buffer to fill in.
*/
public void writeEntryHeader(byte[] outbuf)
{
int offset = 0;
offset = TarUtils.formatNameBytes(name, outbuf, offset, TarConstants.NAMELEN);
offset = TarUtils.formatOctalBytes(mode, outbuf, offset, TarConstants.MODELEN);
offset = TarUtils.formatOctalBytes(userId, outbuf, offset, TarConstants.UIDLEN);
offset = TarUtils.formatOctalBytes(groupId, outbuf, offset, TarConstants.GIDLEN);
offset = TarUtils.formatLongOctalBytes(size, outbuf, offset, TarConstants.SIZELEN);
offset = TarUtils.formatLongOctalBytes(modTime, outbuf, offset, TarConstants.MODTIMELEN);
int csOffset = offset;
for (int c = 0; c < TarConstants.CHKSUMLEN; ++c)
{
outbuf[offset++] = (byte)' ';
}
outbuf[offset++] = linkFlag;
offset = TarUtils.formatNameBytes(linkName, outbuf, offset, TarConstants.NAMELEN);
offset = TarUtils.formatNameBytes(magic, outbuf, offset, TarConstants.MAGICLEN);
offset = TarUtils.formatNameBytes(version, outbuf, offset, TarConstants.VERSIONLEN);
offset = TarUtils.formatNameBytes(userName, outbuf, offset, TarConstants.UNAMELEN);
offset = TarUtils.formatNameBytes(groupName, outbuf, offset, TarConstants.GNAMELEN);
offset = TarUtils.formatOctalBytes(devMajor, outbuf, offset, TarConstants.DEVLEN);
offset = TarUtils.formatOctalBytes(devMinor, outbuf, offset, TarConstants.DEVLEN);
while (offset < outbuf.Length)
{
outbuf[offset++] = 0;
}
long chk = TarUtils.computeCheckSum(outbuf);
TarUtils.formatCheckSumOctalBytes(chk, outbuf, csOffset, TarConstants.CHKSUMLEN);
}
