remapper.cpp

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#include <iostream>
#include <fstream>
#include <sstream>
#include <cstring>
#include <string>
#include <stdio.h>
#include <map>
#include <vector>
 
using namespace std;
 
 
// Remaps old vector files to new (triples) format
int main(int argc, char *argv[] )
{
    if(argc < 2)
    {
        cout << "Usage: " << argv[0] << " <filename>" << endl;
        return 0; 
    }
 
    stringstream outs;
    outs << argv[1] << ".remapped";
    ofstream output(outs.str().c_str());
    ifstream input(argv[1]);
 
    int numrows, total_nnz;
    if (input.is_open())
    {
        int one = 1;
        input >> numrows >> total_nnz;
        output << numrows << "\t" << one << "\t" << total_nnz << endl;
        int cnz = 0;
        int tempind;
        double tempnum;
        while ( (!input.eof()) && cnz < total_nnz)
                {
                        input >> tempind >> tempnum;
            output << tempind << "\t" << one << "\t" << tempnum << endl;
        }
    }
    input.close();
    output.close();
    
    return 0;
}