rangelist()

template<class T >

tfxx::RangeList<T> tfxx::string::rangelist

(

const std::string &

s

)

read rangelist from string

Reads a comma separated list of range strings an passes tham to the range reading function to build a list of ranges.

The input lists in the string are ranges separated by comma: 4-7,9,13-26

A step size can be specified using the '+' symbol. '5+3-12' means: take every third staring at 5 and ending at 12

Definition at line 98 of file rangestring.h.

References gen_split(), and TFXX_assert.

      {
        typedef tfxx::Range<T> Trange;
        typedef tfxx::RangeList<T> Tlist;
        Tlist retval;
        std::list<std::string> slist;
        tfxx::string::gen_split(slist, s, ",", true);
        std::list<std::string>::const_iterator i=slist.begin();
        while (i!=slist.end())
        { 
          std::vector<std::string> svec;
          tfxx::string::gen_split(svec, *i, "+", true);
          if (svec.size()>1)
          {
            std::vector<std::string> svec2;
            tfxx::string::gen_split(svec2, svec[1], "-", true);
            TFXX_assert(svec2.size()>1, "range not properly defined");
            typename Trange::Tvalue start(0), step(0), end(0);
            { std::istringstream iss(svec[0]); iss >> start; }
            { std::istringstream iss(svec2[0]); iss >> step; }
            { std::istringstream iss(svec2[1]); iss >> end; }
            /*
            std::cerr << "start=" << svec[0] 
              << " step=" << svec2[0] 
              << " end=" << svec2[1] << std::endl;
            std::cerr << "start=" << start 
              << " step=" << step 
              << " end=" << end << std::endl;
              */
            TFXX_assert(step>0, "range step size must be positive");
            for (typename Trange::Tvalue j=start; j<=end; j=j+step)
            {
               retval.append(Trange(j,j));
            }
          }
          else
          {
            // no '+' symbol, go ahead with simple range
            retval.append(range<typename Tlist::Tvalue>(*i)); 
          }
          ++i; 
        }
        return retval;
      } // tfxx::RangeList<T> rangelist(const std::string& s)

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