util/charstat.cpp

   1 #include <map>
   2 #include <iostream>
   3 #include <iomanip>
   4 #include <algorithm>
   5 #include <sstream>
   6 #include <cctype>
   7 #include <clocale>
   8 #include <cstdlib>
   9
  10 typedef std::map< char, unsigned > freq_type;
  11
  12 class print: public std::unary_function< freq_type::value_type, void >
  13 {
  14         std::ostream& os;
  15 public:
  16         unsigned total;
  17         print(std::ostream& out, unsigned total) : os(out), total(total) {}
  18         void operator() (const freq_type::value_type& p)
  19         {
  20                 os.fill('0');
  21                 os.width(8);
  22                 os << p.second << ": ";
  23                 os.width(4);
  24                 os.fill(' ');
  25                 if (isgraph(p.first)) {
  26                         os << p.first << " [";
  27                 }
  28                 std::ostringstream oss;
  29                 oss << "0x";
  30                 oss.width(2);
  31                 oss.fill('0');
  32                 oss.setf(std::ios::hex, std::ios::basefield);
  33                 oss << int(p.first);
  34                 os << oss.str() << ":" << unsigned(p.first);
  35                 if (isgraph(p.first)) os << "]";
  36                 os << " (" << double(p.second) / total * 100 << "% : "
  37                         << unsigned((double(p.second) / total) * 4294967296ull) << ")\n";
  38         }
  39 };
  40
  41 int main(void)
  42 {
  43         std::setlocale(LC_ALL, "es_AR");
  44         char c = 0;
  45         unsigned total = 0;
  46         std::map< char, unsigned > freq;
  47         while (std::cin.get(c)) {
  48                 ++freq[c];
  49                 ++total;
  50         }
  51         for_each(freq.begin(), freq.end(), print(std::cout, total));
  52         return 0;
  53 }
  54