/*
* read position of index, which is stored in the last 8 bytes of the file
* byte order of the number is big endian
*/
uint64_t libmaus::huffman::IndexLoaderBase::getIndexPos(std::string const & filename)
{
::libmaus::aio::CheckedInputStream indexistr(filename);
// read position of index (last 8 bytes of file)
// and convert byte order if necessary
indexistr.seekg(-8,std::ios::end);
uint64_t v;
indexistr.read( reinterpret_cast<char *>(&v) , 8 );
#if defined(LIBMAUS_BYTE_ORDER_LITTLE_ENDIAN)
#if defined(_WIN32)
uint64_t const indexpos = _byteswap_uint64(v);
#elif defined(__FreeBSD__)
uint64_t const indexpos = bswap64(v);
#elif defined(__linux__)
uint64_t const indexpos = bswap_64(v);
#else
uint64_t const indexpos = ::libmaus::util::ReverseByteOrder::reverseByteOrder<uint64_t>(v);
#endif
#else
uint64_t const indexpos = v;
#endif
// std::cerr << "Index at position " << indexpos << " file length " << ::libmaus::util::GetFileSize::getFileSize(filename) << std::endl;
return indexpos;
}
IndexDecoderData(std::string const & rfilename)
: filename(rfilename),
numentries(0), posbits(0), kbits(0), kacc(0), vbits(0), vacc(0), indexvectorpos(0)
// , posadpt(this), kadpt(this), vadpt(this)
{
uint64_t const indexpos = getIndexPos(filename);
std::ifstream indexistr(filename.c_str(),std::ios::binary);
if ( ! indexistr.is_open() )
{
::libmaus2::exception::LibMausException se;
se.getStream() << "IndexDecoderData::IndexDecoderData(): Failed to open file " << filename << std::endl;
se.finish();
throw se;
}
// seek to index position
indexistr.clear();
indexistr.seekg(indexpos,std::ios::beg);
if ( static_cast<int64_t>(indexistr.tellg()) != static_cast<int64_t>(indexpos) )
{
::libmaus2::exception::LibMausException se;
se.getStream() << "Failed to seek to position " << indexpos << " of index in file " << filename << " of size "
<< ::libmaus2::util::GetFileSize::getFileSize(filename) << std::endl;
se.finish();
throw se;
}
::libmaus2::bitio::StreamBitInputStream SBIS(indexistr);
// read size of index
numentries = ::libmaus2::bitio::readElias2(SBIS);
// pos bits
posbits = ::libmaus2::bitio::readElias2(SBIS);
// k bits
kbits = ::libmaus2::bitio::readElias2(SBIS);
// k acc
kacc = ::libmaus2::bitio::readElias2(SBIS);
// v bits
vbits = ::libmaus2::bitio::readElias2(SBIS);
// v acc
vacc = ::libmaus2::bitio::readElias2(SBIS);
// align
SBIS.flush();
assert ( SBIS.getBitsRead() % 8 == 0 );
indexvectorpos = indexpos + SBIS.getBitsRead() / 8;
}
ifstream_ptr_type openFile() const
{
ifstream_ptr_type indexistr(new ::std::ifstream(filename.c_str(),std::ios::binary));
if ( ! indexistr->is_open() )
{
::libmaus2::exception::LibMausException se;
se.getStream() << "IndexDecoderData::openFile(): Failed to open file " << filename << std::endl;
se.finish();
throw se;
}
return indexistr;
}
/*
* load index for one file
*/
static IndexEntryContainer::unique_ptr_type
loadAccIndex(std::string const & filename)
{
uint64_t const indexpos = getIndexPos(filename);
::libmaus::aio::CheckedInputStream indexistr(filename);
// seek to index position
indexistr.seekg(indexpos,std::ios::beg);
//
::libmaus::bitio::StreamBitInputStream SBIS(indexistr);
// read size of index
uint64_t const numentries = ::libmaus::bitio::readElias2(SBIS);
// pos bits
unsigned int const posbits = ::libmaus::bitio::readElias2(SBIS);
// k bits
unsigned int const kbits = ::libmaus::bitio::readElias2(SBIS);
// k acc
/* uint64_t const symacc = */ ::libmaus::bitio::readElias2(SBIS);
// v bits
unsigned int const vbits = ::libmaus::bitio::readElias2(SBIS);
// v acc
/* uint64_t const symacc = */ ::libmaus::bitio::readElias2(SBIS);
// align
SBIS.flush();
SBIS.getBitsRead();
// std::cerr << "numentries " << numentries << std::endl;
// read index
libmaus::autoarray::AutoArray< IndexEntry > index(numentries+1,false);
for ( uint64_t i = 0; i < numentries+1; ++i )
{
uint64_t const pos = SBIS.read(posbits);
uint64_t const kcnt = SBIS.read(kbits);
uint64_t const vcnt = SBIS.read(vbits);
index[i] = IndexEntry(pos,kcnt,vcnt);
}
IndexEntryContainer::unique_ptr_type IEC(new IndexEntryContainer(index));
return UNIQUE_PTR_MOVE(IEC);
}
/*
* load index for one file
*/
static libmaus::autoarray::AutoArray< IndexEntry > loadIndex(std::string const & filename)
{
uint64_t const indexpos = getIndexPos(filename);
std::ifstream indexistr(filename.c_str(),std::ios::binary);
if ( ! indexistr.is_open() )
{
::libmaus::exception::LibMausException se;
se.getStream() << "RLDecoder::loadIndex(): Failed to open file " << filename << std::endl;
se.finish();
throw se;
}
// seek to index position
indexistr.seekg(indexpos,std::ios::beg);
if ( static_cast<int64_t>(indexistr.tellg()) != static_cast<int64_t>(indexpos) )
{
::libmaus::exception::LibMausException se;
se.getStream() << "Failed to seek to index position " << indexpos << " in file " << filename << " of size "
<< ::libmaus::util::GetFileSize::getFileSize(filename) << std::endl;
se.finish();
throw se;
}
::libmaus::bitio::StreamBitInputStream SBIS(indexistr);
// read size of index
uint64_t const numentries = ::libmaus::bitio::readElias2(SBIS);
// pos bits
unsigned int const posbits = ::libmaus::bitio::readElias2(SBIS);
// k bits
unsigned int const kbits = ::libmaus::bitio::readElias2(SBIS);
// k acc
/* uint64_t const symacc = */ ::libmaus::bitio::readElias2(SBIS);
// v bits
unsigned int const vbits = ::libmaus::bitio::readElias2(SBIS);
// v acc
/* uint64_t const symacc = */ ::libmaus::bitio::readElias2(SBIS);
// align
SBIS.flush();
SBIS.getBitsRead();
// std::cerr << "numentries " << numentries << std::endl;
// read index
libmaus::autoarray::AutoArray< IndexEntry > index(numentries,false);
// #define INDEXLOADERDEBUG
#if defined(INDEXLOADERDEBUG)
libmaus::autoarray::AutoArray< IndexEntry > tindex(numentries+1);
#endif
for ( uint64_t i = 0; i < numentries; ++i )
{
uint64_t const pos = SBIS.read(posbits);
uint64_t const kcnt = SBIS.read(kbits);
uint64_t const vcnt = SBIS.read(vbits);
index[i] = IndexEntry(pos,kcnt,vcnt);
#if defined(INDEXLOADERDEBUG)
tindex[i] = index[i];
#endif
}
if ( numentries )
{
assert ( index[0].kcnt == 0 );
assert ( index[0].vcnt == 0 );
for ( uint64_t i = 1; i < numentries; ++i )
{
index[i-1].kcnt = index[i].kcnt;
index[i-1].vcnt = index[i].vcnt;
}
/* uint64_t const pos = */ SBIS.read(posbits);
index[numentries-1].kcnt = SBIS.read(kbits);
index[numentries-1].vcnt = SBIS.read(vbits);
#if defined(INDEXLOADERDEBUG)
tindex[numentries].kcnt = index[numentries-1].kcnt;
tindex[numentries].vcnt = index[numentries-1].vcnt;
#endif
}
for ( uint64_t i = numentries-1; i >= 1; --i )
{
index[i].kcnt -= index[i-1].kcnt;
index[i].vcnt -= index[i-1].vcnt;
}
#if defined(INDEXLOADERDEBUG)
for ( uint64_t i = 0; i < numentries; ++i )
{
assert ( index[i].kcnt == tindex[i+1].kcnt-tindex[i].kcnt );
assert ( index[i].vcnt == tindex[i+1].vcnt-tindex[i].vcnt );
}
#endif
#if defined(INDEXLOADERDEBUG)
IndexDecoderData IDD(filename);
assert ( IDD.numentries == numentries );
assert ( IDD.posbits == posbits );
assert ( IDD.kbits == kbits );
assert ( IDD.vbits == vbits );
// assert ( IDD.symacc == symacc );
std::cerr << "((**++CHECKING " << numentries << "...";
uint64_t tkacc = 0;
uint64_t tvacc = 0;
for ( uint64_t i = 0; i < numentries; ++i )
{
IndexEntry const P = IDD.readEntry(i);
assert ( P.pos == index[i].pos );
assert ( P.kcnt == tkacc );
assert ( P.vcnt == tvacc );
tkacc += index[i].kcnt;
tvacc += index[i].vcnt;
}
assert ( tkacc == IDD.readEntry(numentries).kcnt );
assert ( tvacc == IDD.readEntry(numentries).vcnt );
std::cerr << "**++))" << std::endl;
#endif
// std::cerr << "loaded index of size " << numentries << std::endl;
return index;
}
input_stream_pointer_type openFile() const
{
input_stream_pointer_type indexistr(new input_stream_type(filename));
return indexistr;
}
