diff options
Diffstat (limited to 'src/plist.c')
-rw-r--r-- | src/plist.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/plist.c b/src/plist.c new file mode 100644 index 0000000..80c0b27 --- /dev/null +++ b/src/plist.c @@ -0,0 +1,73 @@ +/* + * Copyright (c) 2017 Richard Braun. + * + * 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. + * + * Upstream site with license notes : + * http://git.sceen.net/rbraun/librbraun.git/ + */ + +#include "list.h" +#include "plist.h" + +void +plist_add(struct plist *plist, struct plist_node *pnode) +{ + struct plist_node *next; + + if (plist_empty(plist)) { + list_insert_head(&plist->list, &pnode->node); + list_insert_head(&plist->prio_list, &pnode->prio_node); + return; + } + + list_for_each_entry(&plist->prio_list, next, prio_node) { + if (pnode->priority < next->priority) { + break; + } + } + + if (list_end(&plist->prio_list, &next->prio_node) + || (pnode->priority != next->priority)) { + list_insert_before(&next->prio_node, &pnode->prio_node); + } else { + list_init(&pnode->prio_node); + } + + list_insert_before(&next->node, &pnode->node); +} + +void +plist_remove(struct plist *plist, struct plist_node *pnode) +{ + struct plist_node *next; + + if (!list_node_unlinked(&pnode->prio_node)) { + next = list_next_entry(pnode, node); + + if (!list_end(&plist->list, &next->node) + && list_node_unlinked(&next->prio_node)) { + list_insert_after(&pnode->prio_node, &next->prio_node); + } + + list_remove(&pnode->prio_node); + } + + list_remove(&pnode->node); +} |