void encode(uint64_t const key, uint64_t const val)
{
// start of next block
if ( ! blockleft )
{
uint64_t const ikey = key;
uint64_t const ibitoff = genc.getOffset();
libmaus2::util::NumberSerialisation::serialiseNumber(indexout,ikey);
libmaus2::util::NumberSerialisation::serialiseNumber(indexout,ibitoff);
indexentries++;
// std::cerr << "ikey=" << ikey << " ibitoff=" << ibitoff << std::endl;
blockleft = blocksize;
}
int64_t const dif = (static_cast<int64_t>(key)-prevkey)-1;
genc.encode(dif);
prevkey = key;
assert ( val );
genc.encode(val);
--blockleft;
}
void implicitFlush()
{
uint64_t const bs = pc-pa;
if ( bs )
{
uint64_t acc = 0;
uint64_t const pos = SGO.getWrittenBytes();
GE.encode(bs);
for ( uint64_t i = 0; i < bs; ++i )
{
acc += pa[i].second;
GE.encodeWord(pa[i].first,albits);
GE.encode(pa[i].second);
}
GE.flush();
::libmaus2::huffman::IndexEntry const entry(pos,bs,acc);
index.push_back(entry);
pc = pa;
}
}
void term()
{
genc.encode(0);
genc.encode(0);
genc.flush();
SGO.flush();
SGOout.flush();
indexout.clear();
indexout.seekg(0,std::ios::beg);
// uint64_t const indexpos = SGO.getWrittenBytes();
indexout.clear();
indexout.seekg(0,std::ios::beg);
libmaus2::util::GetFileSize::copy(indexout,SGOout,2*sizeof(uint64_t)*indexentries);
libmaus2::util::NumberSerialisation::serialiseNumber(SGOout,indexentries ? prevkey : 0); // highest key in file
libmaus2::util::NumberSerialisation::serialiseNumber(SGOout,indexentries);
SGOout.flush();
}