Precision Related Error in C++ -

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while building software getting error:

../src/internet/model/nampt-socket.cc: in member function ‘ns3::ptr<ns3::namptsubflow> ns3::namptsocket::switchtomultipathmode()’: ../src/internet/model/nampt-socket.cc:881:14: error: cast ‘ns3::namptsocket*’ ‘uint32_t {aka unsigned int}’ loses precision [-fpermissive]     (uint32_t)this,               ^ waf: leaving directory `/home/vikas/ns-allinone-3.14.1/ns-3.14.1/build' build failed  -> task in 'ns3-internet' failed (exit status 1):      {task 140476688662992: cxx nampt-socket.cc -> nampt-socket.cc.1.o} ['/usr/bin/g++', '-o0', '-ggdb', '-g3', '-wall', '-werror', '-wno-error=deprecated-declarations', '-fstrict-aliasing', '-wstrict-aliasing', '-fpic', '-pthread', '-ibuild', '-i.', '-dns3_assert_enable', '-dns3_log_enable', '-dsqlite3=1', '-dhave_if_tun_h=1', '-denable_gsl', '../src/internet/model/nampt-socket.cc', '-c', '-o', 'src/internet/model/nampt-socket.cc.1.o'] traceback (most recent call last):   file "./build.py", line 214, in <module>     sys.exit(main(sys.argv))   file "./build.py", line 205, in main     build_ns3(config, build_examples, build_tests, args, build_options)   file "./build.py", line 98, in build_ns3     run_command([sys.executable, "waf", "build"] + build_options)   file "/home/vikas/ns-allinone-3.14.1/util.py", line 24, in run_command     raise commanderror("command %r exited code %i" % (argv, retval)) util.commanderror: command ['/usr/bin/python', 'waf', 'build'] exited code 1

the error :

cast ‘ns3::namptsocket*’ ‘uint32_t {aka unsigned int}’ loses precision [-fpermissive]

i searched error using uintptr_t not possible in case. other solution possible ?

the code error comes is:

ptr<namptsubflow>  namptsocket::switchtomultipathmode(void) {   ns_assert(m_firstsocket != 0);   ns_assert(m_firstsocket->m_state == syn_sent || m_firstsocket->m_state == syn_rcvd);   ns_assert(m_firstsocket->m_shellsocket == this);    // change namptcc   // original socket discarded m_tcp->m_sockets   m_sockettypeid = namptcc::gettypeid();   m_firstsocket = namptsocket::convertcongestioncontrol(m_firstsocket);    // subflow   ptr<namptsubflow> sf = setupsubflow(m_firstsocket, true);   sf->m_bbypasssending = true;   ns_assert(sf->m_basesocket == m_firstsocket);    // session name: time-socket-src-des   if (m_timetag == 0)     m_timetag = simulator::now().getseconds();   char buf[128];   snprintf(buf, 128, "%.6f-%08x-%u.%u.%u.%u->%u.%u.%u.%u",              m_timetag,              (uint32_t)this,             (sf->m_localaddress.get() >> 24)&0x000000ff,             (sf->m_localaddress.get() >> 16)&0x000000ff,             (sf->m_localaddress.get() >> 8)&0x000000ff,             (sf->m_localaddress.get() )&0x000000ff,             (sf->m_peeraddress.get() >> 24)&0x000000ff,             (sf->m_peeraddress.get() >> 16)&0x000000ff,             (sf->m_peeraddress.get() >> 8)&0x000000ff,             (sf->m_peeraddress.get() )&0x000000ff );   m_sessionname = buf;    // init connection   m_localport = m_firstsocket->m_endpoint->getlocalport();   m_peerport = m_firstsocket->m_endpoint->getpeerport();   m_nexttx = m_firstsocket->m_nexttxsequence;   m_nexttx ++; // syn consumes 1 byte   m_inputqueue.setheadsequence(m_nexttx);    // next used addr   addressset_t::const_iterator = m_addresses.find(sf->m_localaddress.get());   it++;   if (it == m_addresses.end() )     = m_addresses.begin();   m_nextaddr = it->first;    // m_outputqueue initialized after function returns.    m_firstsocket = 0; // important...   return sf; }

i believe correct way printf pointer use %p. want change code this:

snprintf(buf, 128, "%.6f-%p-%u.%u.%u.%u->%u.%u.%u.%u",              m_timetag,              (void *)this,             (sf->m_localaddress.get() >> 24)&0x000000ff,             (sf->m_localaddress.get() >> 16)&0x000000ff,             (sf->m_localaddress.get() >> 8)&0x000000ff,             (sf->m_localaddress.get() )&0x000000ff,             (sf->m_peeraddress.get() >> 24)&0x000000ff,             (sf->m_peeraddress.get() >> 16)&0x000000ff,             (sf->m_peeraddress.get() >> 8)&0x000000ff,             (sf->m_peeraddress.get() )&0x000000ff );

this avoids need cast kind of integer. %p formats in hexadecimal while avoiding need specify field size in printf statement. automatically adjust size when compiling 32-bit or 64-bit.


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