renamer.cpp

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#include <iostream>
#include <string>
#include <fstream>
#include <sstream>
#include <vector>
#include <algorithm>
#include <chrono>
#include <functional>
#include <cmath>
#include <boost/algorithm/string.hpp>
#include <map>
#include <tuple>
#include <cstdlib>
#include <cstdio>
#include <limits>
#include <omp.h>
 
using namespace std;
 
int main(int argc, char* argv[])
{
    if(argc < 2)
        {
                cout << "Usage: ./renamer <input>" << endl;
                return 0;
        }
        ifstream input1(argv[1], ifstream::in);
    map<string, int> vertexmap;
    int vertexid = 0;
 
    string name = "Renamed_";
    name += string(argv[1]);
    ofstream out(name);
 
    string locline;
    int numlines = 0;
        while(getline(input1,locline))
        {
        std::tuple<int64_t, int64_t, string> triple;    // the third entry is a float, but that doesn't matter here
                vector<string> strs;
                boost::split(strs, locline, boost::is_any_of("\t "));
 
        auto ret = vertexmap.insert(make_pair(strs[0], vertexid));
        if (ret.second) // successfully inserted
        ++vertexid;
 
        // map::insert returns a pair, with its member pair::first set to an 
        // iterator pointing to either the newly inserted element or to the element with an equivalent key in the map
            
        get<0>(triple) = ret.first->second;
            
        ret = vertexmap.insert(make_pair(strs[1], vertexid));
                if (ret.second) ++vertexid;
 
        get<1>(triple) = ret.first->second;
        get<2>(triple) = strs[2];   
        numlines++;
 
        out << get<0>(triple) << "\t" << get<1>(triple) << "\t" << get<2>(triple) << "\n";
    }
    out.close();
    string dictname = "Vertex_Dict_";
    dictname += string(argv[1]);
    ofstream dictout(dictname);
    int max = 0;
    for (auto it = vertexmap.begin(); it != vertexmap.end(); ++it)
    {
        max = std::max(max, it->second);
        dictout << it->second << "\t" << it ->first << endl;
    }
    cout << (max+1) << "\t" << (max+1) << "\t" << numlines << endl;
    dictout.close();
}