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//
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//
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// Copyright (c) 2022 Vinnie Falco (vinnie.falco@gmail.com)
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// Copyright (c) 2022 Vinnie Falco (vinnie.falco@gmail.com)
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//
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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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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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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//
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// Official repository: https://github.com/boostorg/url
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// Official repository: https://github.com/boostorg/url
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//
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//
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#include <boost/url/detail/config.hpp>
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#include <boost/url/detail/config.hpp>
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#include <boost/url/error.hpp>
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#include <boost/url/error.hpp>
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#include <boost/url/pct_string_view.hpp>
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#include <boost/url/pct_string_view.hpp>
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#include <boost/url/detail/decode.hpp>
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#include <boost/url/detail/decode.hpp>
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#include <boost/url/grammar/hexdig_chars.hpp>
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#include <boost/url/grammar/hexdig_chars.hpp>
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#include <boost/url/detail/except.hpp>
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#include <boost/url/detail/except.hpp>
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namespace boost {
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namespace boost {
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namespace urls {
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namespace urls {
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void
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void
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pct_string_view::
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pct_string_view::
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decode_impl(
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decode_impl(
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    string_token::arg& dest,
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    string_token::arg& dest,
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    encoding_opts opt) const
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    encoding_opts opt) const
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{
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{
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    auto p = dest.prepare(dn_);
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    auto p = dest.prepare(dn_);
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    if(dn_ > 0)
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    if(dn_ > 0)
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        detail::decode_unsafe(
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        detail::decode_unsafe(
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            p, p + dn_, s_, opt);
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            p, p + dn_, s_, opt);
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}
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}
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//------------------------------------------------
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//------------------------------------------------
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pct_string_view::
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pct_string_view::
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pct_string_view(
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pct_string_view(
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    core::string_view s)
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    core::string_view s)
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    : pct_string_view(
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    : pct_string_view(
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        make_pct_string_view(s
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        make_pct_string_view(s
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            ).value(BOOST_URL_POS))
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            ).value(BOOST_URL_POS))
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{
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{
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}
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}
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//------------------------------------------------
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//------------------------------------------------
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system::result<pct_string_view>
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system::result<pct_string_view>
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make_pct_string_view(
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make_pct_string_view(
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    core::string_view s) noexcept
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    core::string_view s) noexcept
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{
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{
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    auto p = s.begin();
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    auto p = s.begin();
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    auto const end = s.end();
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    auto const end = s.end();
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    std::size_t dn = 0;
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    std::size_t dn = 0;
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    if(s.size() >= 3)
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    if(s.size() >= 3)
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    {
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    {
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        auto const safe_end = end - 2;
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        auto const safe_end = end - 2;
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        while(p < safe_end)
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        while(p < safe_end)
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        {
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        {
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            if(*p != '%')
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            if(*p != '%')
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            {
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            {
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                ++p;
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                ++p;
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            }
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            }
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            else if(
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            else if(
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                grammar::hexdig_value(p[1]) >= 0 &&
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                grammar::hexdig_value(p[1]) >= 0 &&
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                grammar::hexdig_value(p[2]) >= 0)
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                grammar::hexdig_value(p[2]) >= 0)
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            {
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            {
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                // percent-escape
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                // percent-escape
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                p += 3;
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                p += 3;
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            }
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            }
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            else
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            else
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            {
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            {
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                // invalid encoding
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                // invalid encoding
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                BOOST_URL_RETURN_EC(
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                BOOST_URL_RETURN_EC(
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                    error::bad_pct_hexdig);
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                    error::bad_pct_hexdig);
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            }
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            }
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            ++dn;
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            ++dn;
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        }
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        }
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    }
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    }
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    auto const n = end - p;
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    auto const n = end - p;
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    if( (n >= 1 && p[0] == '%') ||
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    if( (n >= 1 && p[0] == '%') ||
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        (n >= 2 && p[1] == '%'))
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        (n >= 2 && p[1] == '%'))
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    {
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    {
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        // invalid encoding
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        // invalid encoding
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        BOOST_URL_RETURN_EC(
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        BOOST_URL_RETURN_EC(
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            error::incomplete_encoding);
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            error::incomplete_encoding);
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    }
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    }
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    dn += n;
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    dn += n;
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    return make_pct_string_view_unsafe(
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    return make_pct_string_view_unsafe(
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        s.data(), s.size(), dn);
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        s.data(), s.size(), dn);
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}
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}
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} // urls
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} // urls
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} // boost
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} // boost
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