CODEWITHSUNDEEP
c++stringstringstream
NOoB
NOoB

Reputation: 45

Stringstream. Detect end of line

Is there way to detect end of line in stringstream? My file:

1/2
2/3
3/4
4/5

Something like that is not working:

stringstream buffer;
buffer << file.rdbuf();
string str;
getline(buffer, str);
...
istringstream ss(str);
int num;
ss >> num;      
if (ss.peek() == '/') //WORKS AS EXPECTED!
{...}
if(ss.peek() == '\n') //NOT WORKING! SKIPS THIS CONDITION.
{...}

This is was warned:

if(ss.telg() == -1) //WARNED!
             ~~~~~
{...}

Upvotes: 1

Views: 11625

Answers (2)

Johannes Blaschke
Johannes Blaschke

Reputation: 37

You could always use find_first_of:

std::string str_contents = buffer.str();
if(str_contents.find_first_of('\n') != std::string::npos) {
   //contains EOL
}

find_first_of('\n') returns the first instance of the EOL character. If there are none, then it returns (a very large index) std::string::npos. If you know that there is a EOL character in your string, you can get the the first line using

std::string str;
std::getline(buffer, str);

Also see NathanOliver's Answer

Upvotes: 0

Remy Lebeau
Remy Lebeau

Reputation: 595782

std::istringstream has an eof() method:

Returns true if the associated stream has reached end-of-file. Specifically, returns true if eofbit is set in rdstate().

string str;
istringstream ss(str);
int num;
ss >> num;
if (ss.eof()) {...}

Upvotes: 3

Related Questions