CODEWITHSUNDEEP
c++cfile-io
assassin
assassin

Reputation: 21169

is there a function like getdelim is c++?

Is there a function in c++ that works like the getdelim function in C? I want to process a file using std::ifstream object, so I cannot use getdelim here.

Upvotes: 2

Views: 2071

Answers (2)

AProgrammer
AProgrammer

Reputation: 52294

std::getline, both the free function for std::string and the member for char buffers have an overload taking a delimiter (BTW getdelim is a GNU extension)

Upvotes: 5

Manuel
Manuel

Reputation: 13109

If you can use Boost then I recommend the Tokenizer library. The following example tokenizes a stream using whitespace and semicolons as separators:

#include<iostream>
#include<boost/tokenizer.hpp>
#include<string>
#include<algorithm>

int main() {

   typedef boost::char_separator<char> Sep;
   typedef boost::tokenizer<Sep> Tokenizer;

   std::string str("This :is: \n a:: test");
   Tokenizer tok(str, Sep(": \n\r\t"));
   std::copy(tok.begin(), tok.end(), 
             std::ostream_iterator<std::string>(std::cout, "\n"));
}

Output:

This
is
a
test

If you want to tokenize the contents of an input stream it can be done easily:

 int main() {

     std::ifstream ifs("myfile.txt");
     typedef std::istreambuf_iterator<char> StreamIter;
     StreamIter file_iter(ifs);

     typedef boost::char_separator<char> Sep;
     typedef boost::tokenizer<Sep, StreamIter> Tokenizer;

     Tokenizer tok(file_iter, StreamIter(),  Sep(": \n\r\t"));

     std::copy(tok.begin(), tok.end(), 
             std::ostream_iterator<std::string>(std::cout, "\n"));
 }

Upvotes: 1

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