1   
//
1   
//
2   
// Copyright (c) 2021 Vinnie Falco (vinnie.falco@gmail.com)
2   
// Copyright (c) 2021 Vinnie Falco (vinnie.falco@gmail.com)
3   
//
3   
//
4   
// Distributed under the Boost Software License, Version 1.0. (See accompanying
4   
// Distributed under the Boost Software License, Version 1.0. (See accompanying
5   
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
5   
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6   
//
6   
//
7   
// Official repository: https://github.com/cppalliance/http
7   
// Official repository: https://github.com/cppalliance/http
8   
//
8   
//
9  
9  
10   
#include <boost/http/rfc/combine_field_values.hpp>
10   
#include <boost/http/rfc/combine_field_values.hpp>
11  
11  
12   
namespace boost {
12   
namespace boost {
13   
namespace http {
13   
namespace http {
14  
14  
15   
core::string_view
15   
core::string_view
16   
combine_field_values(
16   
combine_field_values(
17   
    fields_base::subrange const& vr,
17   
    fields_base::subrange const& vr,
18   
    grammar::recycled_ptr<std::string>& temp)
18   
    grammar::recycled_ptr<std::string>& temp)
19   
{
19   
{
20   
    core::string_view result;
20   
    core::string_view result;
21   
    bool acquired = false;
21   
    bool acquired = false;
22   
    for(auto s : vr)
22   
    for(auto s : vr)
23   
    {
23   
    {
24   
        if(s.empty())
24   
        if(s.empty())
25   
            continue;
25   
            continue;
26   
        if(result.empty())
26   
        if(result.empty())
27   
        {
27   
        {
28   
            result = s;
28   
            result = s;
29   
        }
29   
        }
30   
        else if(! acquired)
30   
        else if(! acquired)
31   
        {
31   
        {
32   
            acquired = true;
32   
            acquired = true;
33   
            if(temp.empty())
33   
            if(temp.empty())
34   
                temp.acquire();
34   
                temp.acquire();
35   
            temp->clear();
35   
            temp->clear();
36   
            temp->reserve(
36   
            temp->reserve(
37   
                result.size() +
37   
                result.size() +
38   
                1 + s.size());
38   
                1 + s.size());
39   
            *temp = result;
39   
            *temp = result;
40   
            temp->push_back(',');
40   
            temp->push_back(',');
41   
            temp->append(
41   
            temp->append(
42   
                s.data(), s.size());
42   
                s.data(), s.size());
43   
            result = *temp;
43   
            result = *temp;
44   
        }
44   
        }
45   
        else
45   
        else
46   
        {
46   
        {
47   
            temp->reserve(
47   
            temp->reserve(
48   
                temp->size() +
48   
                temp->size() +
49   
                1 + s.size());
49   
                1 + s.size());
50   
            temp->push_back(',');
50   
            temp->push_back(',');
51   
            temp->append(
51   
            temp->append(
52   
                s.data(), s.size());
52   
                s.data(), s.size());
53   
            result = *temp;
53   
            result = *temp;
54   
        }
54   
        }
55   
    }
55   
    }
56   
    return result;
56   
    return result;
57   
}
57   
}
58  
58  
59   
} // http
59   
} // http
60   
} // boost
60   
} // boost