CODEWITHSUNDEEP
c++getlineistringstream
YAKOVM
YAKOVM

Reputation: 10153

Read lines from istringstream ,without '\r' char at the end

I have a following function :

void process (std::string str)
{
    std::istringstream istream(str);
    std::string line;
    std::string specialStr("; -------- Special --------------------\r"); // win
    //std::string specialStr("; -------- Special --------------------"); //linux
    while (getline(istream,line))
    {
      if (strcmp(specialStr.c_str(), line.c_str()) != 0)
      {
          continue;
      }
      else
      {
         //special processing
      }
    }
}

I read the lines from std::istringstream line by line,using getline ,until i "meet" special string after which i should do some special processing for the next lines. The special string is:

; -------- Special -------------------- When I read the corresponding line line in windows it ends with '\r' :

(; -------- Special --------------------\r) In Linux no '\r' appears at the end. Is there a way to read the lines consistently without distinguish if it is linux or windows?

Thanks

Upvotes: 2

Views: 2081

Answers (1)

Scintillo
Scintillo

Reputation: 1704

You can remove the '\r' from the end using this code:

if(line[line.length() - 1] == '\r') line = line.substr(0, line.length() - 1);

You can wrap this into a function if you want to:

std::istream& univGetline(std::istream& stream, std::string& line)
{
    std::getline(stream, line);
    if(line[line.length() - 1] == '\r') line = line.substr(0, line.length() - 1);
    return stream;
}

Integrated into your function: 

void process (std::string str)
{
    std::istringstream istream(str);
    std::string line;
    std::string specialStr("; -------- Special --------------------");

    while (univGetline(istream,line))
    {
      if (strcmp(specialStr.c_str(), line.c_str()) != 0)
      {
          continue;
      }
      else
      {
         //special processing
      }
    }
}

Upvotes: 2

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