HuffmanDecoding.cpp

#include <cstdio>
#include <string>
#include <cctype>
#include <ios>
#include <iostream>
#include <numeric>
#include <vector>
#include <list>
#include <cmath>
#include <algorithm>
#include <cstdlib> // malloc
#include <climits>
#include <utility> // pair

#include <cstring>
#include <ctime>
#include <set>
#include <sstream>
#include <typeinfo>
#include <fstream>
#include <iomanip>

using namespace std;

#define DEBUG(x) cout << #x << ": " << x << "n"

class HuffmanDecoding {
public:
    string decode(string archive, vector<string> d) {
	cout << endl;
	string ret="";
	
	int b=0;
	while(b<archive.size()) {
	    for(int len=1; (b+len)<=archive.size(); ++len) {
		string ss =  archive.substr(b, len);
		vector<string>::iterator iter = find(d.begin(), d.end(), ss);
		if(iter!=d.end()) {
		    int dpos = iter-d.begin();
		    char c = 'A'+dpos;
		    //	    cout << c << endl;
		    b = b+len-1;
		    ret = ret+c;
		    break; // go to new 'b' while loop
		}
	    }
	    ++b;
	}
	
	return ret;
    }
};

// CUT begin
ifstream data("HuffmanDecoding.sample");

string next_line() {
    string s;
    getline(data, s);
    return s;
}

template <typename T> void from_stream(T &t) {
    stringstream ss(next_line());
    ss >> t;
}

void from_stream(string &s) {
    s = next_line();
}

template <typename T> void from_stream(vector<T> &ts) {
    int len;
    from_stream(len);
    ts.clear();
    for (int i = 0; i < len; ++i) {
        T t;
        from_stream(t);
        ts.push_back(t);
    }
}

template <typename T>
string to_string(T t) {
    stringstream s;
    s << t;
    return s.str();
}

string to_string(string t) {
    return "\"" + t + "\"";
}

bool do_test(string archive, vector<string> dictionary, string __expected) {
    time_t startClock = clock();
    HuffmanDecoding *instance = new HuffmanDecoding();
    string __result = instance->decode(archive, dictionary);
    double elapsed = (double)(clock() - startClock) / CLOCKS_PER_SEC;
    delete instance;

    if (__result == __expected) {
        cout << "PASSED!" << " (" << elapsed << " seconds)" << endl;
        return true;
    }
    else {
        cout << "FAILED!" << " (" << elapsed << " seconds)" << endl;
        cout << "           Expected: " << to_string(__expected) << endl;
        cout << "           Received: " << to_string(__result) << endl;
        return false;
    }
}

int run_test(bool mainProcess, const set<int> &case_set, const string command) {
    int cases = 0, passed = 0;
    while (true) {
        if (next_line().find("--") != 0)
            break;
        string archive;
        from_stream(archive);
        vector<string> dictionary;
        from_stream(dictionary);
        next_line();
        string __answer;
        from_stream(__answer);

        cases++;
        if (case_set.size() > 0 && case_set.find(cases - 1) == case_set.end())
            continue;

        cout << "  Testcase #" << cases - 1 << " ... ";
        if ( do_test(archive, dictionary, __answer)) {
            passed++;
        }
    }
    if (mainProcess) {
        cout << endl << "Passed : " << passed << "/" << cases << " cases" << endl;
        int T = time(NULL) - 1484304614;
        double PT = T / 60.0, TT = 75.0;
        cout << "Time   : " << T / 60 << " minutes " << T % 60 << " secs" << endl;
        cout << "Score  : " << 450 * (0.3 + (0.7 * TT * TT) / (10.0 * PT * PT + TT * TT)) << " points" << endl;
    }
    return 0;
}

int main(int argc, char *argv[]) {
    cout.setf(ios::fixed, ios::floatfield);
    cout.precision(2);
    set<int> cases;
    bool mainProcess = true;
    for (int i = 1; i < argc; ++i) {
        if ( string(argv[i]) == "-") {
            mainProcess = false;
        } else {
            cases.insert(atoi(argv[i]));
        }
    }
    if (mainProcess) {
        cout << "HuffmanDecoding (450 Points)" << endl << endl;
    }
    return run_test(mainProcess, cases, argv[0]);
}
// CUT end