#include <istream>
#include <sstream>
#include <fstream>
#include <testsuite_hooks.h>
bool test01()
{
using namespace std;
typedef ios::pos_type pos_type;
bool test = true;
const char str_lit01[] = "istream_seeks-1.tst";
istringstream ist1;
pos_type p3 = ist1.tellg();
ifstream ifs1;
pos_type p4 = ifs1.tellg();
VERIFY( p3 == p4 );
istringstream ist2("bob_marley:kaya");
p3 = ist2.tellg();
ifstream ifs2(str_lit01);
p4 = ifs2.tellg();
VERIFY( p3 == p4 );
return test;
}
const char* s = " lootpack, peanut butter wolf, rob swift, madlib, quasimoto";
const int times = 10;
void write_rewind(std::iostream& stream)
{
for (int j = 0; j < times; j++)
{
bool test = true;
std::streampos begin = stream.tellg();
for (int i = 0; i < times; ++i)
stream << j << '-' << i << s << '\n';
stream.seekg(begin);
std::streampos end = stream.tellg();
std::streampos badpos = std::streampos(std::streambuf::off_type(-1));
}
}
void check_contents(std::iostream& stream)
{
bool test = true;
stream.clear();
stream.seekg(0, std::ios::beg);
int i = 0;
int loop = times * times + 2;
while (i < loop)
{
stream.ignore(80, '\n');
if (stream.good())
++i;
else
break;
}
VERIFY( i == times );
}
void test02()
{
std::fstream ofstrm;
ofstrm.open("istream_seeks-3.txt", std::ios::out);
if (!ofstrm)
std::abort();
write_rewind(ofstrm);
ofstrm.close();
std::fstream ifstrm;
ifstrm.open("istream_seeks-3.txt", std::ios::in);
check_contents(ifstrm);
ifstrm.close();
}
void test03()
{
std::stringstream sstrm;
write_rewind(sstrm);
check_contents(sstrm);
}
void test04(void)
{
typedef std::istream::off_type off_type;
bool test = true;
std::istream::pos_type pos01, pos02, pos03, pos04, pos05, pos06;
std::ios_base::iostate state01, state02;
const char str_lit01[] = "istream_seeks-1.txt";
const char str_lit02[] = "istream_seeks-2.txt";
std::ifstream if01(str_lit01, std::ios_base::in | std::ios_base::out);
std::ifstream if02(str_lit01, std::ios_base::in);
std::ifstream if03(str_lit02, std::ios_base::out | std::ios_base::trunc);
VERIFY( if01.good() );
VERIFY( if02.good() );
VERIFY( if03.good() );
std::istream is01(if01.rdbuf());
std::istream is02(if02.rdbuf());
std::istream is03(if03.rdbuf());
pos01 = is01.tellg();
pos02 = is01.tellg();
VERIFY( pos01 == pos02 );
pos03 = is02.tellg();
pos04 = is02.tellg();
VERIFY( pos03 == pos04 );
pos05 = is03.tellg();
pos06 = is03.tellg();
VERIFY( pos05 == pos06 );
state01 = is01.rdstate();
is01.seekg(10, std::ios_base::cur);
state02 = is01.rdstate();
pos01 = is01.tellg();
VERIFY( pos01 == pos02 + off_type(10) );
VERIFY( state01 == state02 );
pos02 = is01.tellg();
VERIFY( pos02 == pos01 );
state01 = is02.rdstate();
is02.seekg(10, std::ios_base::cur);
state02 = is02.rdstate();
pos03 = is02.tellg();
VERIFY( pos03 == pos04 + off_type(10) );
VERIFY( state01 == state02 );
pos04 = is02.tellg();
VERIFY( pos03 == pos04 );
state01 = is03.rdstate();
is03.seekg(10, std::ios_base::cur);
state02 = is03.rdstate();
pos05 = is03.tellg();
VERIFY( pos05 == pos06 + off_type(10) );
VERIFY( state01 == state02 );
pos06 = is03.tellg();
VERIFY( pos05 == pos06 );
state01 = is01.rdstate();
is01.seekg(20, std::ios_base::beg);
state02 = is01.rdstate();
pos01 = is01.tellg();
VERIFY( pos01 == pos02 + off_type(10) );
VERIFY( state01 == state02 );
pos02 = is01.tellg();
VERIFY( pos02 == pos01 );
state01 = is02.rdstate();
is02.seekg(20, std::ios_base::beg);
state02 = is02.rdstate();
pos03 = is02.tellg();
VERIFY( pos03 == pos04 + off_type(10) );
VERIFY( state01 == state02 );
pos04 = is02.tellg();
VERIFY( pos03 == pos04 );
state01 = is03.rdstate();
is03.seekg(20, std::ios_base::beg);
state02 = is03.rdstate();
pos05 = is03.tellg();
VERIFY( pos05 == pos06 + off_type(10) );
VERIFY( state01 == state02 );
pos06 = is03.tellg();
VERIFY( pos05 == pos06 );
if01.seekg(0, std::ios_base::beg);
pos01 = if01.tellg();
if01.peek();
pos02 = if01.tellg();
VERIFY( pos02 == pos01 );
}
void test05(void)
{
typedef std::istream::off_type off_type;
bool test = true;
std::istream::pos_type pos01, pos02, pos03, pos04, pos05, pos06;
std::ios_base::iostate state01, state02;
const char str_lit01[] = "istream_seeks-1.tst";
std::ifstream if01(str_lit01);
std::ifstream if02(str_lit01);
std::ifstream if03(str_lit01);
VERIFY( if01.good() );
VERIFY( if02.good() );
VERIFY( if03.good() );
std::stringbuf strbuf01(std::ios_base::in | std::ios_base::out);
if01 >> &strbuf01;
std::stringbuf strbuf03(strbuf01.str(), std::ios_base::out);
std::stringbuf strbuf02(strbuf01.str(), std::ios_base::in);
std::istream is01(&strbuf01);
std::istream is02(&strbuf02);
std::istream is03(&strbuf03);
pos01 = is01.tellg();
pos02 = is01.tellg();
VERIFY( pos01 == pos02 );
pos03 = is02.tellg();
pos04 = is02.tellg();
VERIFY( pos03 == pos04 );
pos05 = is03.tellg();
pos06 = is03.tellg();
VERIFY( pos05 == pos06 );
state01 = is01.rdstate();
is01.seekg(10, std::ios_base::cur);
state02 = is01.rdstate();
pos01 = is01.tellg();
VERIFY( pos01 == pos02 + off_type(10) );
VERIFY( state01 == state02 );
pos02 = is01.tellg();
VERIFY( pos02 == pos01 );
state01 = is02.rdstate();
is02.seekg(10, std::ios_base::cur);
state02 = is02.rdstate();
pos03 = is02.tellg();
VERIFY( pos03 == pos04 + off_type(10) );
VERIFY( state01 == state02 );
pos04 = is02.tellg();
VERIFY( pos03 == pos04 );
state01 = is03.rdstate();
is03.seekg(10, std::ios_base::cur);
state02 = is03.rdstate();
pos05 = is03.tellg();
VERIFY( pos05 == pos06 ); VERIFY( state01 != state02 );
pos06 = is03.tellg();
VERIFY( pos05 == pos06 );
state01 = is01.rdstate();
is01.seekg(20, std::ios_base::beg);
state02 = is01.rdstate();
pos01 = is01.tellg();
VERIFY( pos01 == pos02 + off_type(10) );
VERIFY( state01 == state02 );
pos02 = is01.tellg();
VERIFY( pos02 == pos01 );
state01 = is02.rdstate();
is02.seekg(20, std::ios_base::beg);
state02 = is02.rdstate();
pos03 = is02.tellg();
VERIFY( pos03 == pos04 + off_type(10) );
VERIFY( state01 == state02 );
pos04 = is02.tellg();
VERIFY( pos03 == pos04 );
state01 = is03.rdstate();
is03.seekg(20, std::ios_base::beg);
state02 = is03.rdstate();
pos05 = is03.tellg();
VERIFY( pos05 == pos06 ); VERIFY( state01 == state02 );
pos06 = is03.tellg();
VERIFY( pos05 == pos06 );
}
void test06(void)
{
using namespace std;
bool test = true;
string num1("555");
{
istringstream iss(num1);
istream::pos_type pos1 = iss.tellg();
int asNum = 0;
iss >> asNum;
VERIFY( test = iss.eof() );
VERIFY( test = !iss.fail() );
iss.tellg();
VERIFY( test = !iss.fail() );
}
{
istringstream iss(num1);
istream::pos_type pos1 = iss.tellg();
int asNum = 0;
iss >> asNum;
VERIFY( test = iss.eof() );
VERIFY( test = !iss.fail() );
iss.seekg(0, ios_base::beg);
VERIFY( test = !iss.fail() );
}
{
istringstream iss(num1);
istream::pos_type pos1 = iss.tellg();
int asNum = 0;
iss >> asNum;
VERIFY( test = iss.eof() );
VERIFY( test = !iss.fail() );
iss.seekg(pos1);
VERIFY( test = !iss.fail() );
}
}
int main()
{
test01();
test02();
test03();
test04();
test05();
test06();
return 0;
}