boost_beast/beast/http/impl/basic_headers.ipp

//------------------------------------------------------------------------------
/*
    This file is part of Beast: https://github.com/vinniefalco/Beast
    Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>

    Permission to use, copy, modify, and/or distribute this software for any
    purpose  with  or without fee is hereby granted, provided that the above
    copyright notice and this permission notice appear in all copies.

    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================

#ifndef BEAST_HTTP_BASIC_HEADERS_IPP_INCLUDED
#define BEAST_HTTP_BASIC_HEADERS_IPP_INCLUDED

#include <beast/http/detail/writes.h>
#include <beast/asio/type_check.h>

namespace beast {
namespace http {

namespace detail {

inline
auto
basic_headers_base::begin() const ->
    const_iterator
{
    return list_.cbegin();
}

inline
auto
basic_headers_base::end() const ->
    const_iterator
{
    return list_.cend();
}

inline
auto
basic_headers_base::cbegin() const ->
    const_iterator
{
    return list_.cbegin();
}

inline
auto
basic_headers_base::cend() const ->
    const_iterator
{
    return list_.cend();
}

} // detail

//------------------------------------------------------------------------------

template<class Allocator>
void
basic_headers<Allocator>::
delete_all()
{
    for(auto it = list_.begin(); it != list_.end();)
    {
        auto& e = *it++;
        e.~element();
        alloc_traits::deallocate(
            this->member(), &e, 1);
    }
}

template<class Allocator>
inline
void
basic_headers<Allocator>::
move_assign(basic_headers& other, std::false_type)
{
    if(this->member() != other.member())
    {
        copy_from(other);
        other.clear();
    }
    else
    {
        set_ = std::move(other.set_);
        list_ = std::move(other.list_);
    }
}

template<class Allocator>
inline
void
basic_headers<Allocator>::
move_assign(basic_headers& other, std::true_type)
{
    this->member() = std::move(other.member());
    set_ = std::move(other.set_);
    list_ = std::move(other.list_);
}

template<class Allocator>
inline
void
basic_headers<Allocator>::
copy_assign(basic_headers const& other, std::false_type)
{
    copy_from(other);
}

template<class Allocator>
inline
void
basic_headers<Allocator>::
copy_assign(basic_headers const& other, std::true_type)
{
    this->member() = other.member();
    copy_from(other);
}

//------------------------------------------------------------------------------

template<class Allocator>
basic_headers<Allocator>::
~basic_headers()
{
    delete_all();
}

template<class Allocator>
basic_headers<Allocator>::
basic_headers(Allocator const& alloc)
    : empty_base_optimization<
        alloc_type>(alloc)
{
}

template<class Allocator>
basic_headers<Allocator>::
basic_headers(basic_headers&& other)
    : empty_base_optimization<alloc_type>(
        std::move(other.member()))
    , detail::basic_headers_base(
        std::move(other.set_), std::move(other.list_))
{
    other.list_.clear();
    other.set_.clear();
}

template<class Allocator>
auto
basic_headers<Allocator>::
operator=(basic_headers&& other) ->
    basic_headers&
{
    if(this == &other)
        return *this;
    clear();
    move_assign(other, std::integral_constant<bool,
        alloc_traits::propagate_on_container_move_assignment::value>{});
    return *this;
}

template<class Allocator>
basic_headers<Allocator>::
basic_headers(basic_headers const& other)
    : basic_headers(alloc_traits::
        select_on_container_copy_construction(other.member()))
{
    copy_from(other);
}

template<class Allocator>
auto
basic_headers<Allocator>::
operator=(basic_headers const& other) ->
    basic_headers&
{
    clear();
    copy_assign(other, std::integral_constant<bool,
        alloc_traits::propagate_on_container_copy_assignment::value>{});
    return *this;
}

template<class Allocator>
template<class OtherAlloc>
basic_headers<Allocator>::
basic_headers(basic_headers<OtherAlloc> const& other)
{
    copy_from(other);
}

template<class Allocator>
template<class OtherAlloc>
auto
basic_headers<Allocator>::
operator=(basic_headers<OtherAlloc> const& other) ->
    basic_headers&
{
    clear();
    copy_from(other);
    return *this;
}

template<class Allocator>
template<class FwdIt>
basic_headers<Allocator>::
basic_headers(FwdIt first, FwdIt last)
{
    for(;first != last; ++first)
        insert(first->name(), first->value());
}

template<class Allocator>
auto
basic_headers<Allocator>::
find(boost::string_ref const& name) const ->
    iterator
{
    auto const it = set_.find(name, less{});
    if(it == set_.end())
        return list_.end();
    return list_.iterator_to(*it);
}

template<class Allocator>
boost::string_ref
basic_headers<Allocator>::
operator[](boost::string_ref const& name) const
{
    // VFALCO This none object looks sketchy
    static boost::string_ref const none;
    auto const it = find(name);
    if(it == end())
        return none;
    return it->second;
}

template<class Allocator>
void
basic_headers<Allocator>::
clear() noexcept
{
    delete_all();
    list_.clear();
    set_.clear();
}

template<class Allocator>
std::size_t
basic_headers<Allocator>::
erase(boost::string_ref const& name)
{
    auto const it = set_.find(name, less{});
    if(it == set_.end())
        return 0;
    auto& e = *it;
    set_.erase(set_.iterator_to(e));
    list_.erase(list_.iterator_to(e));
    alloc_traits::deallocate(this->member(), &e, 1);
    return 1;
}

template<class Allocator>
void
basic_headers<Allocator>::
insert(boost::string_ref const& name,
    boost::string_ref const& value)
{
    typename set_t::insert_commit_data d;
    auto const result =
        set_.insert_check(name, less{}, d);
    if (result.second)
    {
        auto const p = alloc_traits::allocate(
            this->member(), 1);
        alloc_traits::construct(
            this->member(), p, name, value);
        list_.push_back(*p);
        set_.insert_commit(*p, d);
        return;
    }
    // If field already exists, insert comma
    // separated value as per RFC2616 section 4.2
    auto& cur = result.first->data.second;
    cur.reserve(cur.size() + 1 + value.size());
    cur.append(1, ',');
    cur.append(value.data(), value.size());
}

template<class Allocator>
void
basic_headers<Allocator>::
replace(boost::string_ref const& name,
    boost::string_ref const& value)
{
    erase(name);
    insert(name, value);
}

} // http
} // beast

#endif