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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 "scheme_rule.hpp"
 
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#include <boost/url/grammar/alpha_chars.hpp>
 
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#include <boost/url/grammar/delim_rule.hpp>
 
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#include <boost/url/grammar/lut_chars.hpp>
 
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#include <boost/url/grammar/parse.hpp>
 
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#include <boost/url/grammar/tuple_rule.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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scheme_rule::
 
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parse(
 
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    char const*& it,
 
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    char const* end) const noexcept ->
 
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        system::result<value_type>
 
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{
 
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    auto const start = it;
 
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    if(it == end)
 
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    {
 
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        // end
 
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        BOOST_URL_RETURN_EC(
 
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            grammar::error::mismatch);
 
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    }
 
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    if(! grammar::alpha_chars(*it))
 
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    {
 
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        // expected alpha
 
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        BOOST_URL_RETURN_EC(
 
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            grammar::error::mismatch);
 
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    }
 
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    static
 
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    constexpr
 
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    grammar::lut_chars scheme_chars(
 
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        "0123456789" "+-."
 
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        "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 
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        "abcdefghijklmnopqrstuvwxyz");
 
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    it = grammar::find_if_not(
 
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        it + 1, end, scheme_chars);
 
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    value_type t;
 
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    t.scheme = core::string_view(
 
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        start, it - start);
 
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    t.scheme_id = string_to_scheme(
 
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        t.scheme);
 
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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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