private long writeEntryHeader(final ArArchiveEntry pEntry) throws IOException {
long offset = 0;
boolean mustAppendName = false;
final String n = pEntry.getName();
if (LONGFILE_ERROR == longFileMode && n.length() > 16) {
throw new IOException("filename too long, > 16 chars: " + n);
}
if (LONGFILE_BSD == longFileMode && (n.length() > 16 || n.indexOf(" ") > -1)) {
mustAppendName = true;
offset += write(ArArchiveInputStream.BSD_LONGNAME_PREFIX + String.valueOf(n.length()));
} else {
offset += write(n);
}
offset = fill(offset, 16, ' ');
final String m = "" + (pEntry.getLastModified());
if (m.length() > 12) {
throw new IOException("modified too long");
}
offset += write(m);
offset = fill(offset, 28, ' ');
final String u = "" + pEntry.getUserId();
if (u.length() > 6) {
throw new IOException("userid too long");
}
offset += write(u);
offset = fill(offset, 34, ' ');
final String g = "" + pEntry.getGroupId();
if (g.length() > 6) {
throw new IOException("groupid too long");
}
offset += write(g);
offset = fill(offset, 40, ' ');
final String fm = "" + Integer.toString(pEntry.getMode(), 8);
if (fm.length() > 8) {
throw new IOException("filemode too long");
}
offset += write(fm);
offset = fill(offset, 48, ' ');
final String s = String.valueOf(pEntry.getLength() + (mustAppendName ? n.length() : 0));
if (s.length() > 10) {
throw new IOException("size too long");
}
offset += write(s);
offset = fill(offset, 58, ' ');
offset += write(ArArchiveEntry.TRAILER);
if (mustAppendName) {
offset += write(n);
}
return offset;
}
