static bool compress( T2 &buffer_out, const T1 &buffer_in, bool highest_compression = true )
{
static const bool verbose = false;
bool ret = false;
if( 1 )
{
// resize to worst case
buffer_out.resize( LZ4_compressBound((int)(buffer_in.size())) );
// compress
size_t compressed_size = highest_compression ?
LZ4_compressHC( &buffer_in.at(0), &buffer_out.at(0), buffer_in.size() )
:
LZ4_compress( &buffer_in.at(0), &buffer_out.at(0), buffer_in.size() );
ret = ( compressed_size > 0 && compressed_size < buffer_in.size() );
if( ret )
{
// if ok, resize properly to unused space
buffer_out.resize( compressed_size );
}
if( verbose )
{
// std::cout << moon9::echo( ret, compressed_size, buffer_in.size() );
}
}
return ret;
}
static bool compress( T2 &buffer_out, const T1 &buffer_in, bool highest_compression = true )
{
static const bool verbose = false;
bool ret = false;
if( buffer_in.size() >= 70 )
{
buffer_out.resize( std::max<size_t>( size_t(buffer_in.size() * 1.05), 70 ) );
size_t compressed_size = fastlz_compress_level( highest_compression ? 2 : 1, &buffer_in.at(0), buffer_in.size(), &buffer_out.at(0) );
ret = ( compressed_size > 0 && compressed_size < buffer_in.size() );
if( ret )
{
buffer_out.resize( compressed_size );
}
if( verbose )
{
// std::cout << moon9::echo( ret, compressed_size, buffer_in.size() );
}
}
return ret;
}
void copy_vector(const T1& v1, T2& v2)
{
const typename T1::size_type count = v1.size();
v2.resize(count);
for (typename T1::size_type i = 0 ; i < count ; ++i)
v2[i] = v1[i];
}