C++: storing CSV in contianer

Question

I have a std::string that contains comma separated values, i need to store those values in some suitable container e.g. array, vector or some other container. Is there any built in function through which i could do this? Or i need to write custom code for this?

score 3 · Accepted Answer · answered Jun 06 '11 at 05:12

If you're willing and able to use the Boost libraries, Boost Tokenizer would work really well for this task.

That would look like:

std::string str = "some,comma,separated,words";
typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
boost::char_separator<char> sep(",");
tokenizer tokens(str, sep);
std::vector<std::string> vec(tokens.begin(), tokens.end());

score 2 · Answer 2 · edited May 23 '17 at 10:00

2

You basically need to tokenize the string using , as the delimiter. This earlier Stackoverflow thread shall help you with it.

Here is another relevant post.

edited May 23 '17 at 10:00

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answered Jun 06 '11 at 05:13

Ozair Kafray

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score 0 · Answer 3 · edited May 23 '17 at 11:55

0

I don't think there is any available in the standard library. I would approach like -

Tokenize the string based on , delimeter using strtok.
Convert it to integer using atoi function.
push_back the value to the vector.

If you are comfortable with boost library, check this thread.

edited May 23 '17 at 11:55

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answered Jun 06 '11 at 05:14

Mahesh

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score 0 · Answer 4 · answered Jun 06 '11 at 05:24

Using AXE parser generator you can easily parse your csv string, e.g.

std::string input = "aaa,bbb,ccc,ddd";
std::vector<std::string> v; // your strings get here
auto value = *(r_any() - ',') >> r_push_back(v); // rule for single value
auto csv = *(value & ',') & value & r_end(); // rule for csv string
csv(input.begin(), input.end());

Disclaimer: I didn't test the code above, it might have some superficial errors.

C++: storing CSV in contianer

4 Answers4