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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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//
 
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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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#include <boost/url/detail/config.hpp>
 
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#include "hier_part_rule.hpp"
 
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#include "boost/url/rfc/detail/path_rules.hpp"
 
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#include <boost/url/grammar/parse.hpp>
 
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#include <boost/url/grammar/parse.hpp>
 
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namespace boost {
 
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namespace urls {
 
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namespace detail {
 
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auto
 
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hier_part_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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        // path-empty
 
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        return t;
 
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    }
 
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    if(end - it == 1)
 
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    {
 
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        if(*it == '/')
 
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        {
 
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            // path-absolute
 
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            t.path = make_pct_string_view_unsafe(
 
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                it, 1, 1);
 
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            t.segment_count = 1;
 
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            ++it;
 
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            return t;
 
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        }
 
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        // path-rootless
 
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        auto rv = grammar::parse(
 
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            it, end, segment_rule);
 
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        if(! rv)
 
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            return rv.error();
 
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        t.path = *rv;
 
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        t.segment_count = !t.path.empty();
 
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        return t;
 
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    }
 
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    if( it[0] == '/' &&
 
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        it[1] == '/')
 
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    {
 
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        // "//" authority
 
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        it += 2;
 
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        auto rv = grammar::parse(
 
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            it, end, authority_rule);
 
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        if(! rv)
 
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            return rv.error();
 
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        t.authority = *rv;
 
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        t.has_authority = true;
 
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    }
 
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    // the authority requires an absolute path
 
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    // or an empty path
 
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    if(it == end || (
 
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        t.has_authority && (
 
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            *it != '/' &&
 
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            *it != '?' &&
 
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            *it != '#')))
 
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    {
 
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        // path-empty
 
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        return t;
 
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    }
 
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    auto const it0 = it;
 
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    std::size_t dn = 0;
 
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    if(*it != '/')
 
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    {
 
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        auto rv = grammar::parse(
 
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            it, end, segment_rule);
 
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        if(! rv)
 
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            return rv.error();
 
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        if(rv->empty())
 
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            return t;
 
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        dn += rv->decoded_size();
 
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        ++t.segment_count;
 
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    }
 
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    while(it != end)
 
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    {
 
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        if(*it == '/')
 
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        {
 
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            ++dn;
 
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            ++it;
 
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            ++t.segment_count;
 
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            continue;
 
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        }
 
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        auto rv = grammar::parse(
 
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            it, end, segment_rule);
 
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        if(! rv)
 
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            return rv.error();
 
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        if(rv->empty())
 
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            break;
 
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        dn += rv->decoded_size();
 
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    }
 
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    t.path = make_pct_string_view_unsafe(
 
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        it0, it - it0, dn);
 
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    return t;
 
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}
 
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} // detail
 
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} // urls
 
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} // boost
 
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