src/long_manip.cc

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#include<my_lib/long_manip.hh>
#include<iostream>

namespace my_lib{

  void byte_print(long l) {
    struct conf{
      conf(){ std::cout << std::hex;}
      ~conf(){ std::cout << std::dec;}
    } cn;
    unsigned char* c = (unsigned char*) &l;
    for(unsigned i=0; i<sizeof(long); ++i){
      if(i>0)
        std::cout << '.';
      std::cout << (unsigned) *(c+i);
    }
    std::cout << std::endl;
  }

  void byte_swap(void* p, void* q) {
    unsigned char & c = *((unsigned char*) p);
    unsigned char & d = *((unsigned char*) q);
    c^=d; d^=c; c^=d;
  }
}