/*
 * params.cpp
 *
 *  Created on: Oct 3, 2010
 *      Author: Michael J. Fischer
 *      for use in Yale course CPSC 427a, Fall 2010
 */

#include "params.hpp"

Params::Params(int argc, char* argv[]) :
    flagSeed(false), flagFileName(false), seed(time(0)), fileName("") {

    // Extract command name from full path name provided by some shells
    char* slash = strrchr(argv[0], '/');
    char* prog = slash == NULL ? argv[0] : slash + 1;

    // Parse command arguments

    bool parseError = false;
    int opt;

    while ((opt = getopt(argc, argv, "s:f:")) != -1) {
        switch (opt) {
        case 's':
            flagSeed = true;
            seed = strtoul(optarg, NULL, 0);
            break;
        case 'f':
            flagFileName = true;
            fileName = optarg;
            break;
        default: // '?'
            parseError = true;
            break;
        }
    }

    if (parseError || (flagSeed && flagFileName) || argc != optind + 1) {
        cout << "usage: " << prog << " [-f filename | -s seed] num_rounds"
                << endl;
        exit(1);
    }
    numRounds = strtol(argv[optind], NULL, 0);
};

ostream& Params::print(ostream& out) const {
    out << "[Params:\n";
    out << "  flagSeed=" << flagSeed << "\n";
    out << "  flagFileName=" << flagFileName << "\n";
    out << "  seed=" << seed << "\n";
    out << "  fileName=" << fileName << "\n";
    out << "  flagFileName=" << flagFileName << "\n";
    out << "  numRounds=" << numRounds << "\n";
    out << "End Params]" << endl;
    return out;
}