path.hpp
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//
// Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// Official repository: https://github.com/boostorg/url
//
#ifndef BOOST_URL_DETAIL_PATH_HPP
#define BOOST_URL_DETAIL_PATH_HPP
#include <boost/url/string_view.hpp>
namespace boost {
namespace urls {
namespace detail {
// Return the number of characters at
// the front of the path that are reserved
inline
std::size_t
path_prefix(
char const* p,
std::size_t n) noexcept
{
switch(n)
{
case 0:
return 0;
case 1:
if(p[0] == '/')
return 1;
return 0;
case 2:
if(p[0] == '/')
return 1;
if( p[0] == '.' &&
p[1] == '/')
return 2;
return 0;
default:
if(p[0] == '/')
{
if( p[1] == '.' &&
p[2] == '/')
return 3;
return 1;
}
if( p[0] == '.' &&
p[1] == '/')
return 2;
break;
}
return 0;
}
// VFALCO DEPRECATED
inline
std::size_t
path_prefix(
string_view s) noexcept
{
return path_prefix(
s.data(), s.size());
}
// returns the number of adjusted
// segments based on the malleable prefix.
inline
std::size_t
path_segments(
string_view s,
std::size_t nseg) noexcept
{
switch(s.size())
{
case 0:
BOOST_ASSERT(nseg == 0);
return 0;
case 1:
BOOST_ASSERT(nseg == 1);
if(s[0] == '/')
return 0;
return 1;
case 2:
if(s[0] == '/')
return nseg;
if( s[0] == '.' &&
s[1] == '/')
{
BOOST_ASSERT(nseg > 1);
return nseg - 1;
}
return nseg;
default:
if(s[0] == '/')
{
if( s[1] == '.' &&
s[2] == '/')
{
BOOST_ASSERT(nseg > 1);
return nseg - 1;
}
return nseg;
}
if( s[0] == '.' &&
s[1] == '/')
{
BOOST_ASSERT(nseg > 1);
return nseg - 1;
}
break;
}
return nseg;
}
// Trim reserved characters from
// the front of the path.
inline
string_view
clean_path(
string_view s) noexcept
{
s.remove_prefix(
path_prefix(s));
return s;
}
} // detail
} // urls
} // boost
#endif