curl_header.cpp

/**
 * File:   curl_header.cpp
 * Author: Giuseppe Persico
 */

#include "curl_header.h"
#include "curl_exception.h"
#include <algorithm>

using std::for_each;
using std::initializer_list;
using std::string;

namespace curl
{
    // Implementation of constructor.
    curl_header::curl_header() : size(0), headers(nullptr)
    {
        // ... nothing to do here ...
    }

    // Implementation of the list constructor initialize method.
    curl_header::curl_header(initializer_list<string> headers) : size(0), headers(nullptr)
    {
        for_each(headers.begin(), headers.end(), [this](const string &header)
                 { this->add(header); });
    }

    /**
     * Implementation of assignment operator. The object has just been created, so its members have just
     * been loaded in memory, so we need to give a valid value to them (in this case just to "headers").
     */
    curl_header &curl_header::operator=(const curl_header &header)
    {
        if (this == &header)
        {
            return *this;
        }
        curl_slist_free_all(this->headers);
        struct curl_slist *tmp_ptr = header.headers;
        while (tmp_ptr != nullptr)
        {
            this->add(tmp_ptr->data);
            tmp_ptr = tmp_ptr->next;
        }
        return *this;
    }

    // Implementation of destructor.
    curl_header::~curl_header() NOEXCEPT
    {
        if (this->headers != nullptr)
        {
            curl_slist_free_all(this->headers);
            this->headers = nullptr;
        }
    }

    // Implementation of add overloaded method.
    void curl_header::add(const string &header)
    {
        this->headers = curl_slist_append(this->headers, header.c_str());
        if (this->headers == nullptr)
        {
            throw curl_exception("Null pointer exception", __FUNCTION__);
        }
        ++this->size;
    }
}