mirror of
https://bitbucket.org/librepilot/librepilot.git
synced 2024-11-29 07:24:13 +01:00
381 lines
26 KiB
C
381 lines
26 KiB
C
/*
|
|
Copyright (c) 2007-2009, Troy D. Hanson
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
|
|
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
|
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
|
|
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef UTLIST_H
|
|
#define UTLIST_H
|
|
|
|
#define UTLIST_VERSION 1.8
|
|
|
|
/*
|
|
* This file contains macros to manipulate singly and doubly-linked lists.
|
|
*
|
|
* 1. LL_ macros: singly-linked lists.
|
|
* 2. DL_ macros: doubly-linked lists.
|
|
* 3. CDL_ macros: circular doubly-linked lists.
|
|
*
|
|
* To use singly-linked lists, your structure must have a "next" pointer.
|
|
* To use doubly-linked lists, your structure must "prev" and "next" pointers.
|
|
* Either way, the pointer to the head of the list must be initialized to NULL.
|
|
*
|
|
* ----------------.EXAMPLE -------------------------
|
|
* struct item {
|
|
* int id;
|
|
* struct item *prev, *next;
|
|
* }
|
|
*
|
|
* struct item *list = NULL:
|
|
*
|
|
* int main() {
|
|
* struct item *item;
|
|
* ... allocate and populate item ...
|
|
* DL_APPEND(list, item);
|
|
* }
|
|
* --------------------------------------------------
|
|
*
|
|
* For doubly-linked lists, the append and delete macros are O(1)
|
|
* For singly-linked lists, append and delete are O(n) but prepend is O(1)
|
|
* The sort macro is O(n log(n)) for all types of single/double/circular lists.
|
|
*/
|
|
|
|
/******************************************************************************
|
|
* The sort macro is an adaptation of Simon Tatham's O(n log(n)) mergesort *
|
|
* Unwieldy variable names used here to avoid shadowing passed-in variables. *
|
|
*****************************************************************************/
|
|
#define LL_SORT(list, cmp) \
|
|
do { \
|
|
__typeof__(list)_ls_p, _ls_q, _ls_e, _ls_tail, _ls_oldhead; \
|
|
int _ls_insize, _ls_nmerges, _ls_psize, _ls_qsize, _ls_i, _ls_looping; \
|
|
if (list) { \
|
|
_ls_insize = 1; \
|
|
_ls_looping = 1; \
|
|
while (_ls_looping) { \
|
|
_ls_p = list; \
|
|
_ls_oldhead = list; \
|
|
list = NULL; \
|
|
_ls_tail = NULL; \
|
|
_ls_nmerges = 0; \
|
|
while (_ls_p) { \
|
|
_ls_nmerges++; \
|
|
_ls_q = _ls_p; \
|
|
_ls_psize = 0; \
|
|
for (_ls_i = 0; _ls_i < _ls_insize; _ls_i++) { \
|
|
_ls_psize++; \
|
|
_ls_q = _ls_q->next; \
|
|
if (!_ls_q) { break; } \
|
|
} \
|
|
_ls_qsize = _ls_insize; \
|
|
while (_ls_psize > 0 || (_ls_qsize > 0 && _ls_q)) { \
|
|
if (_ls_psize == 0) { \
|
|
_ls_e = _ls_q; _ls_q = _ls_q->next; _ls_qsize--; \
|
|
} \
|
|
else if (_ls_qsize == 0 || !_ls_q) { \
|
|
_ls_e = _ls_p; _ls_p = _ls_p->next; _ls_psize--; \
|
|
} \
|
|
else if (cmp(_ls_p, _ls_q) <= 0) { \
|
|
_ls_e = _ls_p; _ls_p = _ls_p->next; _ls_psize--; \
|
|
} \
|
|
else { \
|
|
_ls_e = _ls_q; _ls_q = _ls_q->next; _ls_qsize--; \
|
|
} \
|
|
if (_ls_tail) { \
|
|
_ls_tail->next = _ls_e; \
|
|
} \
|
|
else { \
|
|
list = _ls_e; \
|
|
} \
|
|
_ls_tail = _ls_e; \
|
|
} \
|
|
_ls_p = _ls_q; \
|
|
} \
|
|
_ls_tail->next = NULL; \
|
|
if (_ls_nmerges <= 1) { \
|
|
_ls_looping = 0; \
|
|
} \
|
|
_ls_insize *= 2; \
|
|
} \
|
|
} \
|
|
} \
|
|
while (0)
|
|
|
|
#define DL_SORT(list, cmp) \
|
|
do { \
|
|
__typeof__(list)_ls_p, _ls_q, _ls_e, _ls_tail, _ls_oldhead; \
|
|
int _ls_insize, _ls_nmerges, _ls_psize, _ls_qsize, _ls_i, _ls_looping; \
|
|
if (list) { \
|
|
_ls_insize = 1; \
|
|
_ls_looping = 1; \
|
|
while (_ls_looping) { \
|
|
_ls_p = list; \
|
|
_ls_oldhead = list; \
|
|
list = NULL; \
|
|
_ls_tail = NULL; \
|
|
_ls_nmerges = 0; \
|
|
while (_ls_p) { \
|
|
_ls_nmerges++; \
|
|
_ls_q = _ls_p; \
|
|
_ls_psize = 0; \
|
|
for (_ls_i = 0; _ls_i < _ls_insize; _ls_i++) { \
|
|
_ls_psize++; \
|
|
_ls_q = _ls_q->next; \
|
|
if (!_ls_q) { break; } \
|
|
} \
|
|
_ls_qsize = _ls_insize; \
|
|
while (_ls_psize > 0 || (_ls_qsize > 0 && _ls_q)) { \
|
|
if (_ls_psize == 0) { \
|
|
_ls_e = _ls_q; _ls_q = _ls_q->next; _ls_qsize--; \
|
|
} \
|
|
else if (_ls_qsize == 0 || !_ls_q) { \
|
|
_ls_e = _ls_p; _ls_p = _ls_p->next; _ls_psize--; \
|
|
} \
|
|
else if (cmp(_ls_p, _ls_q) <= 0) { \
|
|
_ls_e = _ls_p; _ls_p = _ls_p->next; _ls_psize--; \
|
|
} \
|
|
else { \
|
|
_ls_e = _ls_q; _ls_q = _ls_q->next; _ls_qsize--; \
|
|
} \
|
|
if (_ls_tail) { \
|
|
_ls_tail->next = _ls_e; \
|
|
} \
|
|
else { \
|
|
list = _ls_e; \
|
|
} \
|
|
_ls_e->prev = _ls_tail; \
|
|
_ls_tail = _ls_e; \
|
|
} \
|
|
_ls_p = _ls_q; \
|
|
} \
|
|
list->prev = _ls_tail; \
|
|
_ls_tail->next = NULL; \
|
|
if (_ls_nmerges <= 1) { \
|
|
_ls_looping = 0; \
|
|
} \
|
|
_ls_insize *= 2; \
|
|
} \
|
|
} \
|
|
} \
|
|
while (0)
|
|
|
|
#define CDL_SORT(list, cmp) \
|
|
do { \
|
|
__typeof__(list)_ls_p, _ls_q, _ls_e, _ls_tail, _ls_oldhead; \
|
|
int _ls_insize, _ls_nmerges, _ls_psize, _ls_qsize, _ls_i, _ls_looping; \
|
|
if (list) { \
|
|
_ls_insize = 1; \
|
|
_ls_looping = 1; \
|
|
while (_ls_looping) { \
|
|
_ls_p = list; \
|
|
_ls_oldhead = list; \
|
|
list = NULL; \
|
|
_ls_tail = NULL; \
|
|
_ls_nmerges = 0; \
|
|
while (_ls_p) { \
|
|
_ls_nmerges++; \
|
|
_ls_q = _ls_p; \
|
|
_ls_psize = 0; \
|
|
for (_ls_i = 0; _ls_i < _ls_insize; _ls_i++) { \
|
|
_ls_psize++; \
|
|
_ls_q = ((_ls_q->next == _ls_oldhead) ? NULL : _ls_q->next); \
|
|
if (!_ls_q) { break; } \
|
|
} \
|
|
_ls_qsize = _ls_insize; \
|
|
while (_ls_psize > 0 || (_ls_qsize > 0 && _ls_q)) { \
|
|
if (_ls_psize == 0) { \
|
|
_ls_e = _ls_q; _ls_q = _ls_q->next; _ls_qsize--; \
|
|
if (_ls_q == _ls_oldhead) { _ls_q = NULL; } \
|
|
} \
|
|
else if (_ls_qsize == 0 || !_ls_q) { \
|
|
_ls_e = _ls_p; _ls_p = _ls_p->next; _ls_psize--; \
|
|
if (_ls_p == _ls_oldhead) { _ls_p = NULL; } \
|
|
} \
|
|
else if (cmp(_ls_p, _ls_q) <= 0) { \
|
|
_ls_e = _ls_p; _ls_p = _ls_p->next; _ls_psize--; \
|
|
if (_ls_p == _ls_oldhead) { _ls_p = NULL; } \
|
|
} \
|
|
else { \
|
|
_ls_e = _ls_q; _ls_q = _ls_q->next; _ls_qsize--; \
|
|
if (_ls_q == _ls_oldhead) { _ls_q = NULL; } \
|
|
} \
|
|
if (_ls_tail) { \
|
|
_ls_tail->next = _ls_e; \
|
|
} \
|
|
else { \
|
|
list = _ls_e; \
|
|
} \
|
|
_ls_e->prev = _ls_tail; \
|
|
_ls_tail = _ls_e; \
|
|
} \
|
|
_ls_p = _ls_q; \
|
|
} \
|
|
list->prev = _ls_tail; \
|
|
_ls_tail->next = list; \
|
|
if (_ls_nmerges <= 1) { \
|
|
_ls_looping = 0; \
|
|
} \
|
|
_ls_insize *= 2; \
|
|
} \
|
|
} \
|
|
} \
|
|
while (0)
|
|
|
|
/******************************************************************************
|
|
* singly linked list macros (non-circular) *
|
|
*****************************************************************************/
|
|
#define LL_PREPEND(head, add) \
|
|
do { \
|
|
(add)->next = head; \
|
|
head = add; \
|
|
} \
|
|
while (0)
|
|
|
|
#define LL_APPEND(head, add) \
|
|
do { \
|
|
__typeof__(head)_tmp; \
|
|
(add)->next = NULL; \
|
|
if (head) { \
|
|
_tmp = head; \
|
|
while (_tmp->next) { _tmp = _tmp->next; } \
|
|
_tmp->next = (add); \
|
|
} \
|
|
else { \
|
|
(head) = (add); \
|
|
} \
|
|
} \
|
|
while (0)
|
|
|
|
#define LL_DELETE(head, del) \
|
|
do { \
|
|
__typeof__(head)_tmp; \
|
|
if ((head) == (del)) { \
|
|
(head) = (head)->next; \
|
|
} \
|
|
else { \
|
|
_tmp = head; \
|
|
while (_tmp->next && (_tmp->next != (del))) { \
|
|
_tmp = _tmp->next; \
|
|
} \
|
|
if (_tmp->next) { \
|
|
_tmp->next = ((del)->next); \
|
|
} \
|
|
} \
|
|
} \
|
|
while (0)
|
|
|
|
#define LL_FOREACH(head, el) \
|
|
for (el = head; el; el = el->next)
|
|
|
|
/******************************************************************************
|
|
* doubly linked list macros (non-circular) *
|
|
*****************************************************************************/
|
|
#define DL_PREPEND(head, add) \
|
|
do { \
|
|
(add)->next = head; \
|
|
if (head) { \
|
|
(add)->prev = (head)->prev; \
|
|
(head)->prev = (add); \
|
|
} \
|
|
else { \
|
|
(add)->prev = (add); \
|
|
} \
|
|
(head) = (add); \
|
|
} \
|
|
while (0)
|
|
|
|
#define DL_APPEND(head, add) \
|
|
do { \
|
|
if (head) { \
|
|
(add)->prev = (head)->prev; \
|
|
(head)->prev->next = (add); \
|
|
(head)->prev = (add); \
|
|
(add)->next = NULL; \
|
|
} \
|
|
else { \
|
|
(head) = (add); \
|
|
(head)->prev = (head); \
|
|
(head)->next = NULL; \
|
|
} \
|
|
} \
|
|
while (0);
|
|
|
|
#define DL_DELETE(head, del) \
|
|
do { \
|
|
if ((del)->prev == (del)) { \
|
|
(head) = NULL; \
|
|
} \
|
|
else if ((del) == (head)) { \
|
|
(del)->next->prev = (del)->prev; \
|
|
(head) = (del)->next; \
|
|
} \
|
|
else { \
|
|
(del)->prev->next = (del)->next; \
|
|
if ((del)->next) { \
|
|
(del)->next->prev = (del)->prev; \
|
|
} \
|
|
else { \
|
|
(head)->prev = (del)->prev; \
|
|
} \
|
|
} \
|
|
} \
|
|
while (0);
|
|
|
|
|
|
#define DL_FOREACH(head, el) \
|
|
for (el = head; el; el = el->next)
|
|
|
|
/******************************************************************************
|
|
* circular doubly linked list macros *
|
|
*****************************************************************************/
|
|
#define CDL_PREPEND(head, add) \
|
|
do { \
|
|
if (head) { \
|
|
(add)->prev = (head)->prev; \
|
|
(add)->next = (head); \
|
|
(head)->prev = (add); \
|
|
(add)->prev->next = (add); \
|
|
} \
|
|
else { \
|
|
(add)->prev = (add); \
|
|
(add)->next = (add); \
|
|
} \
|
|
(head) = (add); \
|
|
} \
|
|
while (0)
|
|
|
|
#define CDL_DELETE(head, del) \
|
|
do { \
|
|
if (((head) == (del)) && ((head)->next == (head))) { \
|
|
(head) = 0L; \
|
|
} \
|
|
else { \
|
|
(del)->next->prev = (del)->prev; \
|
|
(del)->prev->next = (del)->next; \
|
|
if ((del) == (head)) { (head) = (del)->next; } \
|
|
} \
|
|
} \
|
|
while (0);
|
|
|
|
#define CDL_FOREACH(head, el) \
|
|
for (el = head; el; el = (el->next == head ? 0L : el->next))
|
|
|
|
|
|
#endif /* UTLIST_H */
|