/**
* Evaluate an entry's header format from a header buffer.
*
* @param header The tar entry header buffer to evaluate the format for.
* @return format type
*/
private int evaluateType(byte[] header) {
if (ArchiveUtils.matchAsciiBuffer(MAGIC_GNU, header, MAGIC_OFFSET, MAGICLEN)) {
return FORMAT_OLDGNU;
}
if (ArchiveUtils.matchAsciiBuffer(MAGIC_POSIX, header, MAGIC_OFFSET, MAGICLEN)) {
return FORMAT_POSIX;
}
return 0;
}
private long writeArchiveHeader() throws IOException {
byte[] header = ArchiveUtils.toAsciiBytes(ArArchiveEntry.HEADER);
out.write(header);
return header.length;
}