minicsv

Bare minimal CSV stream based on C++ file streams where the stream operator can be overloaded for your custom type.

This is a example on how to write to CSV.

#include "minicsv.h"

struct Product
{
    Product() : name(""), qty(0), price(0.0f) {}
    Product(std::string name_, int qty_, float price_) 
        : name(name_), qty(qty_), price(price_) {}
    std::string name;
    int qty;
    float price;
};

int main()
{
    csv::ofstream os("products.txt", std::ios_base::out);
    os.set_delimiter(',', "$$");
    if(os.is_open())
    {
        Product product("Shampoo", 200, 15.0f);
        os << product.name << product.qty << product.price << NEWLINE;
        Product product2("Towel, Soap, Shower Foam", 300, 6.0f);
        os << product2.name << product2.qty << product2.price << NEWLINE;
    }
    os.flush();
    return 0;
}

This is a example on how to read from the same CSV.

#include "minicsv.h"
#include <iostream>

int main()
{
    csv::ifstream is("products.txt", std::ios_base::in);
    is.set_delimiter(',', "$$");
    if(is.is_open())
    {
        Product temp;
        while(is.read_line())
        {
            is >> temp.name >> temp.qty >> temp.price;
            // display the read items
            std::cout << temp.name << "|" << temp.qty << "|" << temp.price << std::endl;
        }
    }
    return 0;
}

The file contents is shown below.

Shampoo,200,15
Towel$$ Soap$$ Shower Foam,300,6

The console output is shown below.

Shampoo|200|15
Towel, Soap, Shower Foam|300|6

Here is on how to overload the operator for your custom type.

template<>
inline csv::istringstream& operator >> (csv::istringstream& istm, Product& val)
{
	return istm >> val.name >> val.qty >> val.price;
}

template<>
inline csv::ostringstream& operator << (csv::ostringstream& ostm, const Product& val)
{
	return ostm << val.name << val.qty << val.price;
}

int main()
{
    // test string streams using overloaded stream operators for Product
    {
        csv::ostringstream os;
        os.set_delimiter(',', "$$");
        Product product("Shampoo", 200, 15.0f);
        os << product << NEWLINE;
        Product product2("Towel, Soap, Shower Foam", 300, 6.0f);
        os << product2 << NEWLINE;

        csv::istringstream is(os.get_text().c_str());
        is.set_delimiter(',', "$$");
        Product prod;
        while (is.read_line())
        {
            is >> prod;
            // display the read items
            std::cout << prod.name << "|" << prod.qty << "|" << prod.price << std::endl;
        }
    }
    return 0;
}

CodeProject Tutorial

tjunxin/minicsv

minicsv