LCOV - code coverage report
Current view: directory - gfx/cairo/cairo/src - cairo-list-private.h (source / functions) Found Hit Coverage
Test: app.info Lines: 30 23 76.7 %
Date: 2012-06-02 Functions: 8 6 75.0 %

       1                 : /* cairo - a vector graphics library with display and print output
       2                 :  *
       3                 :  * Copyright © 2009 Chris Wilson
       4                 :  *
       5                 :  * This library is free software; you can redistribute it and/or
       6                 :  * modify it either under the terms of the GNU Lesser General Public
       7                 :  * License version 2.1 as published by the Free Software Foundation
       8                 :  * (the "LGPL") or, at your option, under the terms of the Mozilla
       9                 :  * Public License Version 1.1 (the "MPL"). If you do not alter this
      10                 :  * notice, a recipient may use your version of this file under either
      11                 :  * the MPL or the LGPL.
      12                 :  *
      13                 :  * You should have received a copy of the LGPL along with this library
      14                 :  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
      15                 :  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
      16                 :  * You should have received a copy of the MPL along with this library
      17                 :  * in the file COPYING-MPL-1.1
      18                 :  *
      19                 :  * The contents of this file are subject to the Mozilla Public License
      20                 :  * Version 1.1 (the "License"); you may not use this file except in
      21                 :  * compliance with the License. You may obtain a copy of the License at
      22                 :  * http://www.mozilla.org/MPL/
      23                 :  *
      24                 :  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
      25                 :  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
      26                 :  * the specific language governing rights and limitations.
      27                 :  *
      28                 :  * The Original Code is the cairo graphics library.
      29                 :  *
      30                 :  * The Initial Developer of the Original Code is Chris Wilson.
      31                 :  *
      32                 :  * Contributor(s):
      33                 :  *      Chris Wilson <chris@chris-wilson.co.uk>
      34                 :  *
      35                 :  */
      36                 : 
      37                 : #ifndef CAIRO_LIST_PRIVATE_H
      38                 : #define CAIRO_LIST_PRIVATE_H
      39                 : 
      40                 : #include "cairo-compiler-private.h"
      41                 : 
      42                 : /* Basic circular, doubly linked list implementation */
      43                 : 
      44                 : typedef struct _cairo_list {
      45                 :     struct _cairo_list *next, *prev;
      46                 : } cairo_list_t;
      47                 : 
      48                 : #define cairo_list_entry(ptr, type, member) \
      49                 :         cairo_container_of(ptr, type, member)
      50                 : 
      51                 : #define cairo_list_first_entry(ptr, type, member) \
      52                 :         cairo_list_entry((ptr)->next, type, member)
      53                 : 
      54                 : #define cairo_list_last_entry(ptr, type, member) \
      55                 :         cairo_list_entry((ptr)->prev, type, member)
      56                 : 
      57                 : #define cairo_list_foreach(pos, head)                   \
      58                 :         for (pos = (head)->next; pos != (head);      pos = pos->next)
      59                 : 
      60                 : #define cairo_list_foreach_entry(pos, type, head, member)               \
      61                 :         for (pos = cairo_list_entry((head)->next, type, member);\
      62                 :              &pos->member != (head);                                     \
      63                 :              pos = cairo_list_entry(pos->member.next, type, member))
      64                 : 
      65                 : #define cairo_list_foreach_entry_safe(pos, n, type, head, member)       \
      66                 :         for (pos = cairo_list_entry ((head)->next, type, member),\
      67                 :              n = cairo_list_entry (pos->member.next, type, member);\
      68                 :              &pos->member != (head);                                     \
      69                 :              pos = n, n = cairo_list_entry (n->member.next, type, member))
      70                 : 
      71                 : #define cairo_list_foreach_entry_reverse(pos, type, head, member)       \
      72                 :         for (pos = cairo_list_entry((head)->prev, type, member);\
      73                 :              &pos->member != (head);                                     \
      74                 :              pos = cairo_list_entry(pos->member.prev, type, member))
      75                 : 
      76                 : #define cairo_list_foreach_entry_reverse_safe(pos, n, type, head, member)       \
      77                 :         for (pos = cairo_list_entry((head)->prev, type, member),\
      78                 :              n = cairo_list_entry (pos->member.prev, type, member);\
      79                 :              &pos->member != (head);                                     \
      80                 :              pos = n, n = cairo_list_entry (n->member.prev, type, member))
      81                 : 
      82                 : #ifdef CAIRO_LIST_DEBUG
      83                 : static inline void
      84                 : _cairo_list_validate (const cairo_list_t *link)
      85                 : {
      86                 :     assert (link->next->prev == link);
      87                 :     assert (link->prev->next == link);
      88                 : }
      89                 : static inline void
      90                 : cairo_list_validate (const cairo_list_t *head)
      91                 : {
      92                 :     cairo_list_t *link;
      93                 : 
      94                 :     cairo_list_foreach (link, head)
      95                 :         _cairo_list_validate (link);
      96                 : }
      97                 : static inline cairo_bool_t
      98                 : cairo_list_is_empty (const cairo_list_t *head);
      99                 : static inline void
     100                 : cairo_list_validate_is_empty (const cairo_list_t *head)
     101                 : {
     102                 :     assert (head->next == NULL || (cairo_list_is_empty (head) && head->next == head->prev));
     103                 : }
     104                 : #else
     105                 : #define _cairo_list_validate(link)
     106                 : #define cairo_list_validate(head)
     107                 : #define cairo_list_validate_is_empty(head)
     108                 : #endif
     109                 : 
     110                 : static inline void
     111             258 : cairo_list_init (cairo_list_t *entry)
     112                 : {
     113             258 :     entry->next = entry;
     114             258 :     entry->prev = entry;
     115             258 : }
     116                 : 
     117                 : static inline void
     118              64 : __cairo_list_add (cairo_list_t *entry,
     119                 :                   cairo_list_t *prev,
     120                 :                   cairo_list_t *next)
     121                 : {
     122              64 :     next->prev = entry;
     123              64 :     entry->next = next;
     124              64 :     entry->prev = prev;
     125              64 :     prev->next = entry;
     126              64 : }
     127                 : 
     128                 : static inline void
     129              64 : cairo_list_add (cairo_list_t *entry, cairo_list_t *head)
     130                 : {
     131                 :     cairo_list_validate (head);
     132                 :     cairo_list_validate_is_empty (entry);
     133              64 :     __cairo_list_add (entry, head, head->next);
     134                 :     cairo_list_validate (head);
     135              64 : }
     136                 : 
     137                 : static inline void
     138               0 : cairo_list_add_tail (cairo_list_t *entry, cairo_list_t *head)
     139                 : {
     140                 :     cairo_list_validate (head);
     141                 :     cairo_list_validate_is_empty (entry);
     142               0 :     __cairo_list_add (entry, head->prev, head);
     143                 :     cairo_list_validate (head);
     144               0 : }
     145                 : 
     146                 : static inline void
     147              64 : __cairo_list_del (cairo_list_t *prev, cairo_list_t *next)
     148                 : {
     149              64 :     next->prev = prev;
     150              64 :     prev->next = next;
     151              64 : }
     152                 : 
     153                 : static inline void
     154              64 : cairo_list_del (cairo_list_t *entry)
     155                 : {
     156              64 :     __cairo_list_del (entry->prev, entry->next);
     157              64 :     cairo_list_init (entry);
     158              64 : }
     159                 : 
     160                 : static inline void
     161               0 : cairo_list_move (cairo_list_t *entry, cairo_list_t *head)
     162                 : {
     163                 :     cairo_list_validate (head);
     164               0 :     __cairo_list_del (entry->prev, entry->next);
     165               0 :     __cairo_list_add (entry, head, head->next);
     166                 :     cairo_list_validate (head);
     167               0 : }
     168                 : 
     169                 : static inline void
     170                 : cairo_list_move_tail (cairo_list_t *entry, cairo_list_t *head)
     171                 : {
     172                 :     cairo_list_validate (head);
     173                 :     __cairo_list_del (entry->prev, entry->next);
     174                 :     __cairo_list_add (entry, head->prev, head);
     175                 :     cairo_list_validate (head);
     176                 : }
     177                 : 
     178                 : static inline void
     179                 : cairo_list_swap (cairo_list_t *entry, cairo_list_t *other)
     180                 : {
     181                 :     __cairo_list_add (entry, other->prev, other->next);
     182                 :     cairo_list_init (other);
     183                 : }
     184                 : 
     185                 : static inline cairo_bool_t
     186                 : cairo_list_is_first (const cairo_list_t *entry,
     187                 :                      const cairo_list_t *head)
     188                 : {
     189                 :     cairo_list_validate (head);
     190                 :     return entry->prev == head;
     191                 : }
     192                 : 
     193                 : static inline cairo_bool_t
     194                 : cairo_list_is_last (const cairo_list_t *entry,
     195                 :                     const cairo_list_t *head)
     196                 : {
     197                 :     cairo_list_validate (head);
     198                 :     return entry->next == head;
     199                 : }
     200                 : 
     201                 : static inline cairo_bool_t
     202             321 : cairo_list_is_empty (const cairo_list_t *head)
     203                 : {
     204                 :     cairo_list_validate (head);
     205             321 :     return head->next == head;
     206                 : }
     207                 : 
     208                 : static inline cairo_bool_t
     209                 : cairo_list_is_singular (const cairo_list_t *head)
     210                 : {
     211                 :     cairo_list_validate (head);
     212                 :     return head->next == head || head->next == head->prev;
     213                 : }
     214                 : 
     215                 : #endif /* CAIRO_LIST_PRIVATE_H */

Generated by: LCOV version 1.7