utils.h

#ifndef UTILS_H
#define UTILS_H

#include <iostream>
#include <string>
#include <vector>
#include <set>
#include <chrono>
#include <mpi.h>

// trim from start
std::string &ltrim(std::string &s);

// trim from end
std::string &rtrim(std::string &s);

// trim from both ends
std::string &trim(std::string &s);

std::string getCurrentDir();

// display vectors
template<typename T>
std::ostream &operator<<(std::ostream &out, const std::vector<T> &v) {
	out << "[";

	typename std::vector<T>::const_iterator first = v.cbegin();
	typename std::vector<T>::const_iterator last = v.cend();

	while (first < last) {
		out << *first;
		++first;

		if (first < last) {
			out << ", ";
		}
	}

	out << "]";
	return out;
}

// display set
template<typename T>
std::ostream &operator<<(std::ostream &out, const std::set<T> &v) {
	out << "{";

	typename std::set<T>::const_iterator first = v.cbegin();
	typename std::set<T>::const_iterator last = v.cend();

	while (first < last) {
		out << *first;
		++first;

		if (first < last) {
			out << ", ";
		}
	}

	out << "}";
	return out;
}

// display pairs
template<typename T, typename U>
std::ostream &operator<<(std::ostream &out, const std::pair<T, U> &v) {
	out << "<" << v.first << "," << v.second << ">";
	return out;
}

std::string ssystem(std::string cmds);

std::string recv_string(int src, MPI_Status *status);

std::string recv_file(int src, MPI_Status *status);

std::string to_string(int i);

void debug(std::string msg);

void error(std::string msg);

void send_file(int dest, std::string file_name);

int m_stoi(std::string s);

void timet(std::string msg, std::chrono::high_resolution_clock::duration dtn);

void time(std::string msg);

void bench(std::string msg, long value);

inline bool file_exists (const std::string& name) {
	if (FILE *file = fopen(name.c_str(), "r")) {
		fclose(file);
		return true;
	} else {
		return false;
	}
}

#endif