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//
 
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// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
 
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// Copyright (c) 2023 Alan de Freitas (alandefreitas@gmail.com)
 
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//
 
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
 
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
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//
 
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// Official repository: https://github.com/boostorg/url
 
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//
 
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#ifndef BOOST_URL_RFC_DETAIL_IMPL_HOST_RULE_HPP
 
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#define BOOST_URL_RFC_DETAIL_IMPL_HOST_RULE_HPP
 
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#include <boost/url/detail/config.hpp>
 
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#include <boost/url/rfc/ipv4_address_rule.hpp>
 
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#include <boost/url/rfc/detail/ip_literal_rule.hpp>
 
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#include <boost/url/rfc/detail/reg_name_rule.hpp>
 
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#include <boost/url/grammar/parse.hpp>
 
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#include <cstring>
 
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namespace boost {
 
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namespace urls {
 
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namespace detail {
 
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inline BOOST_URL_CXX20_CONSTEXPR
 
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auto
 
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host_rule_t::
 
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parse(
 
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    char const*& it,
 
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    char const* const end
 
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        ) const noexcept ->
 
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    system::result<value_type>
 
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{
 
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    value_type t;
 
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    if(it == end)
 
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    {
 
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        t.host_type =
 
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            urls::host_type::name;
 
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        return t;
 
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    }
 
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    auto const it0 = it;
 
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    if(*it == '[')
 
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    {
 
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        // IP-literal
 
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        auto rv = grammar::parse(
 
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            it, end,
 
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            detail::ip_literal_rule);
 
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        if(! rv)
 
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            return rv.error();
 
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        auto v = *rv;
 
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        if(v.is_ipv6)
 
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        {
 
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            auto const b =
 
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                v.ipv6.to_bytes();
 
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            std::memcpy(
 
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                t.addr,
 
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                b.data(),
 
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                b.size());
 
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            t.host_type =
 
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                urls::host_type::ipv6;
 
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            t.match = make_pct_string_view_unsafe(
 
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                it0, it - it0, it - it0);
 
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            return t;
 
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        }
 
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        t.host_type =
 
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            urls::host_type::ipvfuture;
 
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        t.match = make_pct_string_view_unsafe(
 
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            it0, it - it0, it - it0);
 
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        return t;
 
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    }
 
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    // IPv4address
 
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    {
 
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        auto rv = grammar::parse(
 
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            it, end, ipv4_address_rule);
 
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        if( rv )
 
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        {
 
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            auto it02 = it;
 
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            auto rv2 = grammar::parse(
 
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                it, end,
 
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                detail::reg_name_rule);
 
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            if (rv2.has_value() &&
 
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                !rv2->empty())
 
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            {
 
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                auto dn = static_cast<
 
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                    std::size_t>(it02 - it0) +
 
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                    rv2->decoded_size();
 
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                t.name = make_pct_string_view_unsafe(
 
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                    it0, it - it0, dn);
 
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                t.host_type =
 
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                    urls::host_type::name;
 
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                t.match = t.name;
 
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                return t;
 
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            }
 
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            it = it02;
 
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            auto const b =
 
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                rv->to_bytes();
 
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            std::memcpy(
 
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                t.addr,
 
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                b.data(),
 
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                b.size());
 
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            t.host_type =
 
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                urls::host_type::ipv4;
 
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            t.match = make_pct_string_view_unsafe(
 
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                it0, it - it0, it - it0);
 
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            return t;
 
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        }
 
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        it = it0;
 
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    }
 
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    // reg-name
 
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    {
 
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        auto rv = grammar::parse(
 
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            it, end,
 
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            detail::reg_name_rule);
 
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        if(! rv)
 
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            return rv.error();
 
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        t.name = *rv;
 
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        t.host_type =
 
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            urls::host_type::name;
 
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        t.match = *rv;
 
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        return t;
 
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    }
 
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}
 
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} // detail
 
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} // urls
 
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} // boost
 
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#endif