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intrusive_links.h
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/******************************************************************************
The MIT License(MIT)
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
Copyright(c) 2016 John Wellbelove
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files(the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions :
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
******************************************************************************/
#ifndef ETL_INTRUSIVE_LINKS_INCLUDED
#define ETL_INTRUSIVE_LINKS_INCLUDED
#include "platform.h"
#include "algorithm.h"
#include "error_handler.h"
#include "exception.h"
#include "nullptr.h"
#include "type_traits.h"
#include "utility.h"
#include <stddef.h>
//*****************************************************************************
// Note:
// The link functions work slightly differently to the STL 'insert' convention
// in that the second link parameter will be inserted after the first.
// i.e.
// If the list contains '1', '2', '3', '4' and "link_splice '2','5'" is invoked
// the resulting list will contain '1', '2', '5', '3', '4' This is to maintain
// consistency between forward and bidirectional links and also is intuitive.
//*****************************************************************************
namespace etl
{
//***************************************************************************
//***************************************************************************
class link_exception : public etl::exception
{
public:
link_exception(string_type reason_, string_type file_name_, numeric_type line_number_)
: exception(reason_, file_name_, line_number_)
{
}
};
//***************************************************************************
//***************************************************************************
class not_unlinked_exception : public etl::link_exception
{
public:
not_unlinked_exception(string_type file_name_, numeric_type line_number_)
: link_exception(ETL_ERROR_TEXT("link:still linked", ETL_INTRUSIVE_LINKS_FILE_ID"A"), file_name_, line_number_)
{
}
};
//***************************************************************************
//***************************************************************************
template <size_t ID_>
struct forward_link
{
enum
{
ID = ID_,
};
//***********************************
ETL_CONSTEXPR forward_link()
: etl_next(ETL_NULLPTR)
{
}
//***********************************
ETL_CONSTEXPR forward_link(forward_link* p_next)
: etl_next(p_next)
{
}
//***********************************
ETL_CONSTEXPR forward_link(const forward_link& other)
: etl_next(other.etl_next)
{
}
//***********************************
ETL_CONSTEXPR14 forward_link& operator=(const forward_link& other)
{
etl_next = other.etl_next;
return *this;
}
//***********************************
void clear()
{
etl_next = ETL_NULLPTR;
}
//***********************************
ETL_NODISCARD
bool is_linked() const
{
return etl_next != ETL_NULLPTR;
}
//***********************************
ETL_NODISCARD
bool has_next() const
{
return etl_next != ETL_NULLPTR;
}
//***********************************
void set_next(forward_link* n)
{
etl_next = n;
}
//***********************************
void set_next(forward_link& n)
{
etl_next = &n;
}
//***********************************
ETL_NODISCARD
forward_link* get_next() const
{
return etl_next;
}
forward_link* etl_next;
};
//***********************************
template <typename TLink>
struct is_forward_link
{
static ETL_CONSTANT bool value = etl::is_same<TLink, etl::forward_link<TLink::ID> >::value;
};
//***********************************
#if ETL_USING_CPP17
template <typename TLink>
inline constexpr bool is_forward_link_v = etl::is_forward_link<TLink>::value;
#endif
//***************************************************************************
// link
//***************************************************************************
// Reference, Reference
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link(TLink& lhs, TLink& rhs)
{
lhs.etl_next = &rhs;
}
//***********************************
// Pointer, Pointer
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link(TLink* lhs, TLink* rhs)
{
if (lhs != ETL_NULLPTR)
{
lhs->etl_next = rhs;
}
}
//***********************************
// Reference, Pointer
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link(TLink& lhs, TLink* rhs)
{
lhs.etl_next = rhs;
}
//***********************************
// Pointer, Reference
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link(TLink* lhs, TLink& rhs)
{
if (lhs != ETL_NULLPTR)
{
lhs->etl_next = &rhs;
}
}
//***************************************************************************
// link_splice
//***************************************************************************
// Reference, Reference
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link_splice(TLink& lhs, TLink& rhs)
{
rhs.etl_next = lhs.etl_next;
lhs.etl_next = &rhs;
}
//***********************************
// Pointer, Pointer
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link_splice(TLink* lhs, TLink* rhs)
{
if (lhs != ETL_NULLPTR)
{
if (rhs != ETL_NULLPTR)
{
rhs->etl_next = lhs->etl_next;
}
lhs->etl_next = rhs;
}
}
//***********************************
// Reference, Pointer
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link_splice(TLink& lhs, TLink* rhs)
{
if (rhs != ETL_NULLPTR)
{
rhs->etl_next = lhs.etl_next;
}
lhs.etl_next = rhs;
}
//***********************************
// Pointer, Reference
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link_splice(TLink* lhs, TLink& rhs)
{
if (lhs != ETL_NULLPTR)
{
rhs.etl_next = lhs->etl_next;
lhs->etl_next = &rhs;
}
}
//***********************************
// Reference, Reference, Reference
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link_splice(TLink& lhs, TLink& first, TLink& last)
{
last.etl_next = lhs.etl_next;
lhs.etl_next = &first;
}
//***********************************
// Pointer, Reference, Reference
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link_splice(TLink* lhs, TLink& first, TLink& last)
{
if (lhs != ETL_NULLPTR)
{
last.etl_next = lhs->etl_next;
lhs->etl_next = &first;
}
else
{
last.etl_next = ETL_NULLPTR;
}
}
//***************************************************************************
// unlink_after
//***************************************************************************
// Reference
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, TLink*>::type unlink_after(TLink& node)
{
if (node.etl_next != ETL_NULLPTR)
{
TLink* unlinked_node = node.etl_next;
node.etl_next = unlinked_node->etl_next;
unlinked_node->clear();
return unlinked_node;
}
return node.etl_next;
}
//***********************************
// Reference, Reference
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, TLink*>::type unlink_after(TLink& before, TLink& last)
{
TLink* first = before.etl_next;
if (&before != &last)
{
before.etl_next = last.etl_next;
last.clear();
}
return first;
}
// Reference
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, bool>::type is_linked(TLink& node)
{
return node.is_linked();
}
// Pointer
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, bool>::type is_linked(TLink* node)
{
return node->is_linked();
}
//***************************************************************************
// link_clear
//***************************************************************************
// Reference
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link_clear(TLink& start)
{
start.etl_next = ETL_NULLPTR;
}
//***********************************
// Pointer
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link_clear(TLink* start)
{
if (start != ETL_NULLPTR)
{
etl::link_clear(*start);
}
}
//***************************************************************************
// link_clear range
//***************************************************************************
// Reference
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link_clear_range(TLink& start)
{
TLink* current = &start;
while (current != ETL_NULLPTR)
{
TLink* next = current->etl_next;
current->clear();
current = next;
}
}
//***********************************
// Pointer
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type link_clear_range(TLink* start)
{
if (start != ETL_NULLPTR)
{
etl::link_clear_range(*start);
}
}
#if ETL_USING_CPP17
//***************************************************************************
//***************************************************************************
template <typename TLink, typename... TLinks>
typename etl::enable_if<etl::is_forward_link<TLink>::value, TLink*>::type create_linked_list(TLink& first, TLinks&... links)
{
TLink* current = &first;
((current->etl_next = &links, current = &links), ...);
return current;
}
//***************************************************************************
//***************************************************************************
template <typename TLink, typename... TLinks>
typename etl::enable_if<etl::is_forward_link<TLink>::value, TLink*>::type create_linked_list(TLink* first, TLinks*... links)
{
if (first != ETL_NULLPTR)
{
return create_linked_list(*first, (*links)...);
}
else
{
return nullptr;
}
}
#elif ETL_USING_CPP11
//***************************************************************************
//***************************************************************************
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, TLink*>::type create_linked_list(TLink& first)
{
return &first;
}
//***************************************************************************
//***************************************************************************
template <typename TLink, typename... TLinks>
typename etl::enable_if<etl::is_forward_link<TLink>::value, TLink*>::type create_linked_list(TLink& first, TLink& next, TLinks&... links)
{
first.etl_next = &next;
return create_linked_list(next, static_cast<TLink&>(links)...);
}
//***************************************************************************
//***************************************************************************
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, TLink*>::type create_linked_list(TLink* first)
{
if (first != ETL_NULLPTR)
{
return create_linked_list(*first);
}
else
{
return ETL_NULLPTR;
}
}
//***************************************************************************
//***************************************************************************
template <typename TLink, typename... TLinks>
typename etl::enable_if<etl::is_forward_link<TLink>::value, TLink*>::type create_linked_list(TLink* first, TLink* next, TLinks*... links)
{
if (first != ETL_NULLPTR)
{
return create_linked_list(*first, *next, static_cast<TLink&>(*links)...);
}
else
{
return ETL_NULLPTR;
}
}
#endif
//***************************************************************************
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type detach_linked_list(TLink& first)
{
link_clear_range(first);
}
//***************************************************************************
template <typename TLink>
typename etl::enable_if<etl::is_forward_link<TLink>::value, void>::type detach_linked_list(TLink* first)
{
if (first != ETL_NULLPTR)
{
detach_linked_list(*first);
}
}
//***************************************************************************
//***************************************************************************
template <size_t ID_>
struct bidirectional_link
{
enum
{
ID = ID_,
};
//***********************************
ETL_CONSTEXPR bidirectional_link()
: etl_previous(ETL_NULLPTR)
, etl_next(ETL_NULLPTR)
{
}
//***********************************
ETL_CONSTEXPR bidirectional_link(bidirectional_link* p_previous, bidirectional_link* p_next)
: etl_previous(p_previous)
, etl_next(p_next)
{
}
//***********************************
ETL_CONSTEXPR bidirectional_link(const bidirectional_link& other)
: etl_previous(other.etl_previous)
, etl_next(other.etl_next)
{
}
//***********************************
ETL_CONSTEXPR14 bidirectional_link& operator=(const bidirectional_link& other)
{
etl_previous = other.etl_previous;
etl_next = other.etl_next;
return *this;
}
//***********************************
void clear()
{
etl_previous = ETL_NULLPTR;
etl_next = ETL_NULLPTR;
}
//***********************************
ETL_NODISCARD
bool is_linked() const
{
return (etl_previous != ETL_NULLPTR) || (etl_next != ETL_NULLPTR);
}
//***********************************
ETL_NODISCARD
bool has_next() const
{
return etl_next != ETL_NULLPTR;
}
//***********************************
ETL_NODISCARD
bool has_previous() const
{
return etl_previous != ETL_NULLPTR;
}
//***********************************
void set_next(bidirectional_link* n)
{
etl_next = n;
}
//***********************************
void set_next(bidirectional_link& n)
{
etl_next = &n;
}
//***********************************
ETL_NODISCARD
bidirectional_link* get_next() const
{
return etl_next;
}
//***********************************
void set_previous(bidirectional_link* n)
{
etl_previous = n;
}
//***********************************
void set_previous(bidirectional_link& n)
{
etl_previous = &n;
}
//***********************************
ETL_NODISCARD
bidirectional_link* get_previous() const
{
return etl_previous;
}
//***********************************
void reverse()
{
using ETL_OR_STD::swap; // Allow ADL
swap(etl_previous, etl_next);
}
//***********************************
void unlink()
{
// Connect the previous link with the next.
if (etl_previous != ETL_NULLPTR)
{
etl_previous->etl_next = etl_next;
}
// Connect the next link with the previous.
if (etl_next != ETL_NULLPTR)
{
etl_next->etl_previous = etl_previous;
}
clear();
}
bidirectional_link* etl_previous;
bidirectional_link* etl_next;
};
//***********************************
template <typename TLink>
struct is_bidirectional_link
{
static ETL_CONSTANT bool value = etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value;
};
//***********************************
#if ETL_USING_CPP17
template <typename TLink>
inline constexpr bool is_bidirectional_link_v = etl::is_bidirectional_link<TLink>::value;
#endif
//***************************************************************************
// link
//***************************************************************************
// Reference, Reference
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type link(TLink& lhs, TLink& rhs)
{
lhs.etl_next = &rhs;
rhs.etl_previous = &lhs;
}
//***********************************
// Pointer, Pointer
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type link(TLink* lhs, TLink* rhs)
{
if (lhs != ETL_NULLPTR)
{
lhs->etl_next = rhs;
}
if (rhs != ETL_NULLPTR)
{
rhs->etl_previous = lhs;
}
}
//***********************************
// Reference, Pointer
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type link(TLink& lhs, TLink* rhs)
{
lhs.etl_next = rhs;
if (rhs != ETL_NULLPTR)
{
rhs->etl_previous = &lhs;
}
}
//***********************************
// Pointer, Reference
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type link(TLink* lhs, TLink& rhs)
{
if (lhs != ETL_NULLPTR)
{
lhs->etl_next = &rhs;
}
rhs.etl_previous = lhs;
}
//***********************************
// Reference, Reference
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type link_splice(TLink& lhs, TLink& rhs)
{
rhs.etl_next = lhs.etl_next;
rhs.etl_previous = &lhs;
if (lhs.etl_next != ETL_NULLPTR)
{
lhs.etl_next->etl_previous = &rhs;
}
lhs.etl_next = &rhs;
}
//***************************************************************************
// link_splice
//***************************************************************************
// Pointer, Pointer
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type link_splice(TLink* lhs, TLink* rhs)
{
if (rhs != ETL_NULLPTR)
{
if (lhs != ETL_NULLPTR)
{
rhs->etl_next = lhs->etl_next;
}
rhs->etl_previous = lhs;
}
if (lhs != ETL_NULLPTR)
{
if (lhs->etl_next != ETL_NULLPTR)
{
lhs->etl_next->etl_previous = rhs;
}
lhs->etl_next = rhs;
}
}
//***********************************
// Reference, Pointer
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type link_splice(TLink& lhs, TLink* rhs)
{
if (rhs != ETL_NULLPTR)
{
rhs->etl_next = lhs.etl_next;
rhs->etl_previous = &lhs;
}
if (lhs.etl_next != ETL_NULLPTR)
{
lhs.etl_next->etl_previous = rhs;
}
lhs.etl_next = rhs;
}
//***********************************
// Pointer, Reference
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type link_splice(TLink* lhs, TLink& rhs)
{
if (lhs != ETL_NULLPTR)
{
rhs.etl_next = lhs->etl_next;
}
rhs.etl_previous = lhs;
if (lhs != ETL_NULLPTR)
{
if (lhs->etl_next != ETL_NULLPTR)
{
lhs->etl_next->etl_previous = &rhs;
}
lhs->etl_next = &rhs;
}
}
//***********************************
// Reference, Reference, Reference
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type link_splice(TLink& lhs, TLink& first,
TLink& last)
{
last.etl_next = lhs.etl_next;
first.etl_previous = &lhs;
if (last.etl_next != ETL_NULLPTR)
{
last.etl_next->etl_previous = &last;
}
lhs.etl_next = &first;
}
//***********************************
// Pointer, Reference, Reference
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type link_splice(TLink* lhs, TLink& first,
TLink& last)
{
if (lhs != ETL_NULLPTR)
{
last.etl_next = lhs->etl_next;
}
else
{
last.etl_next = ETL_NULLPTR;
}
first.etl_previous = lhs;
if (last.etl_next != ETL_NULLPTR)
{
last.etl_next->etl_previous = &last;
}
if (lhs != ETL_NULLPTR)
{
lhs->etl_next = &first;
}
}
//***************************************************************************
// unlink
//***************************************************************************
// Reference
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type unlink(TLink& node)
{
node.unlink();
}
//***********************************
// Reference Reference
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, TLink&>::type unlink(TLink& first, TLink& last)
{
if (&first == &last)
{
first.unlink();
}
else
{
if (last.etl_next != ETL_NULLPTR)
{
last.etl_next->etl_previous = first.etl_previous;
}
if (first.etl_previous != ETL_NULLPTR)
{
first.etl_previous->etl_next = last.etl_next;
}
first.etl_previous = ETL_NULLPTR;
last.etl_next = ETL_NULLPTR;
}
return first;
}
// Reference
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, bool>::type is_linked(TLink& node)
{
return node.is_linked();
}
// Pointer
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, bool>::type is_linked(TLink* node)
{
return node->is_linked();
}
//***************************************************************************
// link_clear_range
//***************************************************************************
// Reference
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type link_clear_range(TLink& start)
{
TLink* current = &start;
while (current != ETL_NULLPTR)
{
TLink* next = current->etl_next;
current->clear();
current = next;
}
}
//***********************************
// Pointer
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::bidirectional_link<TLink::ID> >::value, void>::type link_clear_range(TLink* start)
{
if (start != ETL_NULLPTR)
{
etl::link_clear_range(*start);
}
}
#if ETL_USING_CPP17
//***************************************************************************
//***************************************************************************
template <typename TLink, typename... TLinks>
typename etl::enable_if<etl::is_bidirectional_link<TLink>::value, TLink*>::type create_linked_list(TLink& first, TLinks&... links)
{
TLink* current = &first;
((current->etl_next = &links, static_cast<TLink&>(links).etl_previous = current, current = &links), ...);
return current;
}
//***************************************************************************
//***************************************************************************
template <typename TLink, typename... TLinks>
typename etl::enable_if<etl::is_bidirectional_link<TLink>::value, TLink*>::type create_linked_list(TLink* first, TLinks*... links)
{
TLink* current = first;
((current->etl_next = links, static_cast<TLink*>(links)->etl_previous = current, current = links), ...);
return current;
}
#elif ETL_USING_CPP11
//***************************************************************************
//***************************************************************************
template <typename TLink>
typename etl::enable_if<etl::is_bidirectional_link<TLink>::value, TLink*>::type create_linked_list(TLink& first)
{
return &first;
}
//***************************************************************************
//***************************************************************************
template <typename TLink, typename... TLinks>
typename etl::enable_if<etl::is_bidirectional_link<TLink>::value, TLink*>::type create_linked_list(TLink& first, TLink& next, TLinks&... links)
{
first.etl_next = &next;
next.etl_previous = &first;
return create_linked_list(next, static_cast<TLink&>(links)...);
}
//***************************************************************************
//***************************************************************************
template <typename TLink, typename... TLinks>
typename etl::enable_if<etl::is_bidirectional_link<TLink>::value, TLink*>::type create_linked_list(TLink* first, TLink* next, TLinks*... links)
{
if (first != ETL_NULLPTR)
{
return create_linked_list(*first, *next, static_cast<TLink&>(*links)...);
}
else
{
return ETL_NULLPTR;
}
}
#endif
//***************************************************************************
template <typename TLink>
typename etl::enable_if<etl::is_bidirectional_link<TLink>::value, void>::type detach_linked_list(TLink& first)
{
link_clear_range(first);
}
//***************************************************************************
template <typename TLink>
typename etl::enable_if<etl::is_bidirectional_link<TLink>::value, void>::type detach_linked_list(TLink* first)
{
if (first != ETL_NULLPTR)
{
detach_linked_list(*first);
}
}
//***************************************************************************
//***************************************************************************
template <size_t ID_>
struct tree_link
{
enum
{
ID = ID_,
};
//***********************************
tree_link()
: etl_parent(ETL_NULLPTR)
, etl_left(ETL_NULLPTR)
, etl_right(ETL_NULLPTR)
{
}
//***********************************
tree_link(tree_link* p_parent, tree_link* p_left, tree_link* p_right)
: etl_parent(p_parent)
, etl_left(p_left)
, etl_right(p_right)
{
}
//***********************************
tree_link(const tree_link& other)
: etl_parent(other.etl_parent)
, etl_left(other.etl_left)
, etl_right(other.etl_right)
{
}
//***********************************
tree_link& operator=(const tree_link& other)
{
etl_parent = other.etl_parent;
etl_left = other.etl_left;
etl_right = other.etl_right;
return *this;
}
//***********************************
void clear()
{
etl_parent = ETL_NULLPTR;
etl_left = ETL_NULLPTR;
etl_right = ETL_NULLPTR;
}
//***********************************
bool is_linked() const
{
return (etl_parent != ETL_NULLPTR) || (etl_left != ETL_NULLPTR) || (etl_right != ETL_NULLPTR);
}
//***********************************
ETL_NODISCARD
bool has_parent() const
{
return etl_parent != ETL_NULLPTR;
}
//***********************************
ETL_NODISCARD
bool has_left() const
{
return etl_left != ETL_NULLPTR;
}
//***********************************
ETL_NODISCARD
bool has_right() const
{
return etl_right != ETL_NULLPTR;
}
//***********************************
void set_parent(tree_link* p)
{
etl_parent = p;
}
//***********************************
void set_left(tree_link* l)
{
etl_left = l;
}
//***********************************
void set_right(tree_link* r)
{
etl_right = r;
}
//***********************************
void set_parent(tree_link& p)
{
etl_parent = &p;
}
//***********************************
void set_left(tree_link& l)
{
etl_left = &l;
}
//***********************************
void set_right(tree_link& r)
{
etl_right = &r;
}
//***********************************
ETL_NODISCARD
tree_link* get_parent() const
{
return etl_parent;
}
//***********************************
ETL_NODISCARD
tree_link* get_left() const
{
return etl_left;
}
//***********************************
ETL_NODISCARD
tree_link* get_right() const
{
return etl_right;
}
//***********************************
void mirror()
{
using ETL_OR_STD::swap;
swap(etl_left, etl_right);
}
tree_link* etl_parent;
tree_link* etl_left;
tree_link* etl_right;
};
//***********************************
template <typename TLink>
struct is_tree_link
{
static ETL_CONSTANT bool value = etl::is_same<TLink, etl::tree_link<TLink::ID> >::value;
};
//***********************************
#if ETL_USING_CPP17
template <typename TLink>
inline constexpr bool is_tree_link_v = etl::is_tree_link<TLink>::value;
#endif
//***************************************************************************
// link_left
// Sets the left link.
//***************************************************************************
// Reference, Reference
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_left(TLink& parent, TLink& child)
{
parent.etl_left = &child;
child.etl_parent = &parent;
}
//***********************************
// Pointer, Pointer
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_left(TLink* parent, TLink* child)
{
if (parent != ETL_NULLPTR)
{
parent->etl_left = child;
}
if (child != ETL_NULLPTR)
{
child->etl_parent = parent;
}
}
//***********************************
// Reference, Pointer
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_left(TLink& parent, TLink* child)
{
parent.etl_left = child;
if (child != ETL_NULLPTR)
{
child->etl_parent = &parent;
}
}
//***********************************
// Pointer, Reference
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_left(TLink* parent, TLink& child)
{
if (parent != ETL_NULLPTR)
{
parent->etl_left = &child;
}
child.etl_parent = parent;
}
//***************************************************************************
// link_right
// Sets the right link.
//***************************************************************************
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_right(TLink& parent, TLink& child)
{
parent.etl_right = &child;
child.etl_parent = &parent;
}
//***********************************
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_right(TLink* parent, TLink* child)
{
if (parent != ETL_NULLPTR)
{
parent->etl_right = child;
}
if (child != ETL_NULLPTR)
{
child->etl_parent = parent;
}
}
//***********************************
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_right(TLink& parent, TLink* child)
{
parent.etl_right = child;
if (child != ETL_NULLPTR)
{
child->etl_parent = &parent;
}
}
//***********************************
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_right(TLink* parent, TLink& child)
{
if (parent != ETL_NULLPTR)
{
parent->etl_right = &child;
}
child.etl_parent = parent;
}
//***************************************************************************
// link_rotate_left
//***************************************************************************
// Reference, Reference
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_rotate_left(TLink& parent, TLink& child)
{
TLink* grandparent = parent.etl_parent;
parent.etl_right = child.etl_left;
if (parent.etl_right != ETL_NULLPTR)
{
parent.etl_right->etl_parent = &parent;
}
child.etl_parent = grandparent;
parent.etl_parent = &child;
child.etl_left = &parent;
if (grandparent != ETL_NULLPTR)
{
if (grandparent->etl_left == &parent)
{
grandparent->etl_left = &child;
}
else if (grandparent->etl_right == &parent)
{
grandparent->etl_right = &child;
}
}
}
//***********************************
// Pointer, Pointer
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_rotate_left(TLink* parent, TLink* child)
{
if ((parent != ETL_NULLPTR) && (child != ETL_NULLPTR))
{
link_rotate_left(*parent, *child);
}
}
//***********************************
// Reference, Pointer
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_rotate_left(TLink& parent, TLink* child)
{
if (child != ETL_NULLPTR)
{
link_rotate_left(parent, *child);
}
}
//***********************************
// Pointer, Reference
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_rotate_left(TLink* parent, TLink& child)
{
if (parent != ETL_NULLPTR)
{
link_rotate_left(*parent, child);
}
}
//***************************************************************************
// link_rotate_right
//***************************************************************************
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_rotate_right(TLink& parent, TLink& child)
{
TLink* grandparent = parent.etl_parent;
parent.etl_left = child.etl_right;
if (parent.etl_left != ETL_NULLPTR)
{
parent.etl_left->etl_parent = &parent;
}
child.etl_parent = grandparent;
parent.etl_parent = &child;
child.etl_right = &parent;
if (grandparent != ETL_NULLPTR)
{
if (grandparent->etl_left == &parent)
{
grandparent->etl_left = &child;
}
else if (grandparent->etl_right == &parent)
{
grandparent->etl_right = &child;
}
}
}
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_rotate_right(TLink* parent, TLink* child)
{
if ((parent != ETL_NULLPTR) && (child != ETL_NULLPTR))
{
link_rotate_right(*parent, *child);
}
}
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_rotate_right(TLink& parent, TLink* child)
{
if (child != ETL_NULLPTR)
{
link_rotate_right(parent, *child);
}
}
//***********************************
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_rotate_right(TLink* parent, TLink& child)
{
if (parent != ETL_NULLPTR)
{
link_rotate_right(*parent, child);
}
}
//***************************************************************************
// link_rotate
//***************************************************************************
// Reference, Reference
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_rotate(TLink& parent, TLink& child)
{
if (parent.etl_left == &child)
{
etl::link_rotate_right(parent, child);
}
else
{
etl::link_rotate_left(parent, child);
}
}
//***********************************
// Pointer, Pointer
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_rotate(TLink* parent, TLink* child)
{
if ((parent != ETL_NULLPTR) && (child != ETL_NULLPTR))
{
if (parent->etl_left == child)
{
etl::link_rotate_right(*parent, *child);
}
else
{
etl::link_rotate_left(*parent, *child);
}
}
}
//***********************************
// Reference, Pointer
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_rotate(TLink& parent, TLink* child)
{
if (child != ETL_NULLPTR)
{
if (parent.etl_left == child)
{
etl::link_rotate_right(parent, *child);
}
else
{
etl::link_rotate_left(parent, *child);
}
}
}
//***********************************
// Pointer, Reference
template <typename TLink>
typename etl::enable_if<etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_rotate(TLink* parent, TLink& child)
{
if (parent != ETL_NULLPTR)
{
if (parent->etl_left == &child)
{
etl::link_rotate_right(*parent, child);
}
else
{
etl::link_rotate_left(*parent, child);
}
}
}
// Reference
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_clear(TLink& node)
{
node.clear();
}
// Pointer
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, void>::type link_clear(TLink* node)
{
node->clear();
}
// Reference
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, bool>::type is_linked(TLink& node)
{
return node.is_linked();
}
// Pointer
template <typename TLink>
typename etl::enable_if< etl::is_same<TLink, etl::tree_link<TLink::ID> >::value, bool>::type is_linked(TLink* node)
{
return node->is_linked();
}
} // namespace etl
#endif
algorithm.h
etl::link_exception
Link exception.
Definition intrusive_links.h:60
error_handler.h
exception.h
etl::exception::exception
ETL_EXCEPTION_CONSTEXPR exception(string_type reason_, string_type, numeric_type)
Constructor.
Definition exception.h:81
etl::exception
Definition exception.h:59
type
etl
Definition absolute.h:40
etl::swap
ETL_CONSTEXPR14 void swap(etl::typed_storage_ext< T > &lhs, etl::typed_storage_ext< T > &rhs) ETL_NOEXCEPT
Swap two etl::typed_storage_ext.
Definition alignment.h:856
etl::link_rotate
etl::enable_if< etl::is_same< TLink, etl::tree_link< TLink::ID > >::value, void >::type link_rotate(TLink &parent, TLink &child)
Automatically detects whether a left or right rotate is expected.
Definition intrusive_links.h:1377
nullptr.h
platform.h
etl::is_bidirectional_link
Definition intrusive_links.h:625
etl::is_forward_link
Definition intrusive_links.h:164
etl::is_tree_link
Definition intrusive_links.h:1131
etl::type
type_traits.h
utility.h