#include <iostream>
#include <sstream>
#include <backward/strstream>
#include <fstream>
#include <cstdio>
#include <ios>

using namespace std;


void test_ptell() 
{
	cout << "Testing tellp." << endl;
	ostringstream ost1;
	ostrstream ost2;
	ofstream ofs("foobar");
	FILE * fi = fopen("barfoo", "r");
	cout << "ostringstream.tellp() = " << ost1.tellp()
	     << "\n   ostrstream.tellp() = " << ost2.tellp()
	     << "\n     ofstream.tellp() = " << ofs.tellp()
	     << "\n              ftell() = " << ftell(fi) << endl;
}


void test_pubseekoff_beg_out()
{
	cout << "Testing pubseekoff(0, ios::beg, ios::out)" << endl;
	ostringstream ost1;
	ostrstream ost2;
	ofstream ofs("foobar");
	FILE * fi = fopen("barfoo", "r");
	cout << "ostringstream.rdbuf()->pubseekoff() = "
	     << ost1.rdbuf()->pubseekoff(0, ios::beg, ios::out)
	     << "\n   ostrstream.rdbuf()->pubseekoff() = "
	     << ost2.rdbuf()->pubseekoff(0, ios::beg, ios::out)
	     << "\n     ofstream.rdbuf()->pubseekoff() = "
	     << ofs.rdbuf()->pubseekoff(0, ios::beg, ios::out)
	     << "\n                            fseek() = "
	     <<  fseek(fi, 0, SEEK_SET) << endl;

}


void test_pubseekoff_cur_out()
{
	cout << "Testing pubseekoff(0, ios::cur, ios::out)" << endl;
	ostringstream ost1;
	ostrstream ost2;
	ofstream ofs("foobar");
	FILE * fi = fopen("barfoo", "r");
	cout << "ostringstream.rdbuf()->pubseekoff() = "
	     << ost1.rdbuf()->pubseekoff(0, ios::cur, ios::out)
	     << "\n   ostrstream.rdbuf()->pubseekoff() = "
	     << ost2.rdbuf()->pubseekoff(0, ios::cur, ios::out)
	     << "\n     ofstream.rdbuf()->pubseekoff() = "
	     << ofs.rdbuf()->pubseekoff(0, ios::cur, ios::out)
	     << "\n                            fseek() = "
	     << fseek(fi, 0, SEEK_CUR) << endl;

}


void test_pubseekoff_end_out()
{
	cout << "Testing pubseekoff(0, ios::end, ios::out)" << endl;
	ostringstream ost1;
	ostrstream ost2;
	ofstream ofs("foobar");
	FILE * fi = fopen("barfoo", "r");
	cout << "ostringstream.rdbuf()->pubseekoff() = "
	     << ost1.rdbuf()->pubseekoff(0, ios::end, ios::out)
	     << "\n   ostrstream.rdbuf()->pubseekoff() = "
	     << ost2.rdbuf()->pubseekoff(0, ios::end, ios::out)
	     << "\n     ofstream.rdbuf()->pubseekoff() = "
	     << ofs.rdbuf()->pubseekoff(0, ios::end, ios::out)
	     << "\n                            fseek() = "
	     << fseek(fi, 0, SEEK_END) << endl;

}


void test_pubseekoff_beg_in()
{
	cout << "Testing pubseekoff(0, ios::beg, ios::in)" << endl;
	istringstream ost1("");
	istrstream ost2("");
	ifstream ofs("foobar");
	FILE * fi = fopen("barfoo", "w");
	cout << "ostringstream.rdbuf()->pubseekoff() = "
	     << ost1.rdbuf()->pubseekoff(0, ios::beg, ios::in)
	     << "\n   ostrstream.rdbuf()->pubseekoff() = "
	     << ost2.rdbuf()->pubseekoff(0, ios::beg, ios::in)
	     << "\n     ofstream.rdbuf()->pubseekoff() = "
	     << ofs.rdbuf()->pubseekoff(0, ios::beg, ios::in)
	     << "\n                            fseek() = "
	     << fseek(fi, 0, SEEK_SET) << endl;

}


void test_pubseekoff_cur_in()
{
	cout << "Testing pubseekoff(0, ios::cur, ios::in)" << endl;
	istringstream ost1("");
	istrstream ost2("");
	ifstream ofs("foobar");
	FILE * fi = fopen("barfoo", "w");
	cout << "ostringstream.rdbuf()->pubseekoff() = "
	     << ost1.rdbuf()->pubseekoff(0, ios::cur, ios::in)
	     << "\n   ostrstream.rdbuf()->pubseekoff() = "
	     << ost2.rdbuf()->pubseekoff(0, ios::cur, ios::in)
	     << "\n     ofstream.rdbuf()->pubseekoff() = "
	     << ofs.rdbuf()->pubseekoff(0, ios::cur, ios::in)
	     << "\n                            fseek() = "
	     << fseek(fi, 0, SEEK_CUR) << endl;

}


void test_pubseekoff_end_in()
{
	cout << "Testing pubseekoff(0, ios::end, ios::in)" << endl;
	istringstream ost1("");
	istrstream ost2("");
	ifstream ofs("foobar");
	FILE * fi = fopen("barfoo", "w");
	cout << "istringstream.rdbuf()->pubseekoff() = "
	     << ost1.rdbuf()->pubseekoff(0, ios::end, ios::in)
	     << "\n   istrstream.rdbuf()->pubseekoff() = "
	     << ost2.rdbuf()->pubseekoff(0, ios::end, ios::in)
	     << "\n     ifstream.rdbuf()->pubseekoff() = "
	     << ofs.rdbuf()->pubseekoff(0, ios::end, ios::in)
	     << "\n                            fseek() = "
	     << fseek(fi, 0, SEEK_END) << endl;

}


void test_pubseekoff_beg_inout()
{
	cout << "Testing pubseekoff(0, ios::beg, ios::in|ios::out)" << endl;
	stringstream ost1("", ios::in|ios::out);
	strstream ost2("", ios::in|ios::out);
	fstream ofs("foobar", ios::in|ios::out);
	FILE * fi = fopen("barfoo", "r+");
	cout << "stringstream.rdbuf()->pubseekoff() = "
	     << ost1.rdbuf()->pubseekoff(0, ios::beg, ios::in|ios::out)
	     << "\n   strstream.rdbuf()->pubseekoff() = "
	     << ost2.rdbuf()->pubseekoff(0, ios::beg, ios::in|ios::out)
	     << "\n     fstream.rdbuf()->pubseekoff() = "
	     << ofs.rdbuf()->pubseekoff(0, ios::beg, ios::in|ios::out)
	     << "\n                            fseek() = "
	     << fseek(fi, 0, SEEK_SET) << endl;

}


void test_pubseekoff_cur_inout()
{
	cout << "Testing pubseekoff(0, ios::cur, ios::in|ios::out)" << endl;
	stringstream ost1("", ios::in|ios::out);
	strstream ost2("", ios::in|ios::out);
	fstream ofs("foobar", ios::in|ios::out);
	FILE * fi = fopen("barfoo", "r+");
	cout << "stringstream.rdbuf()->pubseekoff() = "
	     << ost1.rdbuf()->pubseekoff(0, ios::cur, ios::in|ios::out)
	     << "\n   strstream.rdbuf()->pubseekoff() = "
	     << ost2.rdbuf()->pubseekoff(0, ios::cur, ios::in|ios::out)
	     << "\n     fstream.rdbuf()->pubseekoff() = "
	     << ofs.rdbuf()->pubseekoff(0, ios::cur, ios::in|ios::out)
	     << "\n                            fseek() = "
	     << fseek(fi, 0, SEEK_CUR) << endl;

}


void test_pubseekoff_end_inout()
{
	cout << "Testing pubseekoff(0, ios::end, ios::in|ios::out)" << endl;
	stringstream ost1("", ios::in|ios::out);
	strstream ost2("", ios::in|ios::out);
	fstream ofs("foobar", ios::in|ios::out);
	FILE * fi = fopen("barfoo", "r+");
	cout << "stringstream.rdbuf()->pubseekoff() = "
	     << ost1.rdbuf()->pubseekoff(0, ios::end, ios::in|ios::out)
	     << "\n   strstream.rdbuf()->pubseekoff() = "
	     << ost2.rdbuf()->pubseekoff(0, ios::end, ios::in|ios::out)
	     << "\n     fstream.rdbuf()->pubseekoff() = "
	     << ofs.rdbuf()->pubseekoff(0, ios::end, ios::in|ios::out)
	     << "\n                            fseek() = "
	     <<  fseek(fi, 0, SEEK_END) << endl;

}


int main()
{
	test_ptell();
	test_pubseekoff_beg_out();
	test_pubseekoff_cur_out();
	test_pubseekoff_end_out();
	test_pubseekoff_beg_in();
	test_pubseekoff_cur_in();
	test_pubseekoff_end_in();
	test_pubseekoff_beg_inout();
	test_pubseekoff_cur_inout();
	test_pubseekoff_end_inout();
}