ByteArrayPtr Datagram::encode () const {
// simple encoding headerLength, contentLength, header, content
// both with 4 bytes
size_t headerLength = mHeader ? mHeader->size() : 0;
if (headerLength > 2147483647) {
Log (LogError) << LOGID << "Header to long!" << std::endl;
assert (false);
return ByteArrayPtr();
}
size_t contentLength = mContent ? mContent->size() : 0;
if (contentLength > 2147483647) {
Log (LogError) << LOGID << "Content to long" << std::endl;
assert (false);
return ByteArrayPtr();
}
uint32_t hln = htonl ((uint32_t)headerLength);
uint32_t cln = htonl ((uint32_t)contentLength);
ByteArrayPtr dest = createByteArrayPtr ();
dest->reserve(8 + headerLength + contentLength);
dest->append((const char*) &hln, 4);
dest->append((const char*) &cln, 4);
if (mHeader)
dest->append(*mHeader);
if (mContent)
dest->append(*mContent);
assert (dest->size() == 8 + headerLength + contentLength);
return dest;
}
sf::ByteArrayPtr BoshTransport::read (long maxSize) {
ByteArrayPtr result = sf::createByteArrayPtr();
if (maxSize < 0 || maxSize >= (long) mInputBuffer.size()) {
result->swap (mInputBuffer);
} else {
result->append (mInputBuffer.const_c_array(), maxSize);
mInputBuffer.l_truncate(maxSize);
}
return result;
}