Question

I have a string that is received from third party. This string is actually the text from a text file and it may contain UNIX LF or Windows CRLF for line termination. How can I break this into multiple strings ignoring blank lines? I was planning to do the following, but am not sure if there is a better way. All I need to do is read line by line. Vector here is just a convenience and I can avoid it.
* Unfortunately I donot have access to the actual file. I only receive the string object *

string textLine;
vector<string> tokens;

size_t pos = 0;
while( true ) {
    size_t nextPos = textLine.find( pos, '\n\r' );
    if( nextPos == textLine.npos )
        break;
    tokens.push_back( string( textLine.substr( pos, nextPos - pos ) ) );
    pos = nextPos + 1;
}

Answer 1

I’d use getline to create new strings based on \n, and then manipulate the line endings.

string textLine;
vector<string> tokens;

istringstream sTextLine;
string line;
while(getline(sTextLine, line)) {
  if(line.empty()) continue;
  if(line[line.size()-1] == '\r') line.resize(line.size()-1);
  if(line.empty()) continue;
  tokens.push_back(line);
}

EDIT: Use istringstream instead of stringstream.