String.cc

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#include <boost/tokenizer.hpp>
#include <utl/String.h>
#include <utl/ErrorLogger.h>

using namespace std;


namespace utl {

  namespace String {

    vector<string>
    Split(const string& str, const char* const separators)
    {
      typedef boost::tokenizer<boost::char_separator<char>> Tok;
      const Tok tok(str, boost::char_separator<char>(separators));
      vector<string> vec;
      copy(tok.begin(), tok.end(), back_insert_iterator<vector<string>>(vec));
      return vec;
    }


    string
    OfAlreadySortedIds(const vector<int>& ids)
    {
      auto it = ids.cbegin();
      const auto end = ids.cend();
      if (it == end)
        return "";
      int first = *it;
      int last = 0;
      int prev = first;
      ostringstream oss;
      while (++it != end) {
        const int curr = *it;
        if (prev+1 == curr)
          last = curr;
        else {
          oss << first;
          if (last)
            oss << (first+1 == last ? ' ' : '-') << last;
          oss << ' ';
          first = curr;
          last = 0;
        }
        prev = curr;
      }
      oss << first;
      if (last)
        oss << (first+1 == last ? ' ' : '-') << last;
      return oss.str();
    }


    string
    OfSortedIds(vector<int> ids)
    {
      sort(ids.begin(), ids.end());
      return OfAlreadySortedIds(ids);
    }


    string
    OfSortedIds(const set<int>& ids)
    {
      return OfAlreadySortedIds(vector<int>(ids.begin(), ids.end()));
    }

  }

}