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/*
* Tiny doubly-linked list implementation.
* Copyright (c) 2023-2024, Quinn Stephens and the OSMORA team.
* Provided under the BSD 3-Clause license.
*/
#ifndef _LIST_H
#define _LIST_H
#include <stddef.h>
struct list_entry {
struct list_entry *prev;
struct list_entry *next;
};
struct list {
struct list_entry *tail;
struct list_entry *head;
size_t length;
};
static inline void
list_remove(struct list_entry *entry)
{
entry->prev->next = entry->next;
entry->next->prev = entry->prev;
}
static inline void
list_append(struct list *list, struct list_entry *entry)
{
entry->prev = list->tail;
entry->next = (struct list_entry*)list;
entry->prev->next = entry;
list->tail = entry;
list->length++;
}
static inline void
list_prepend(struct list *list, struct list_entry *entry)
{
entry->next = list->head;
entry->prev = (struct list_entry*)list;
entry->next->prev = entry;
list->head = entry;
list->length++;
}
static inline void
list_init(struct list *list)
{
list->tail = (struct list_entry*)list;
list->head = (struct list_entry*)list;
list->length = 0;
}
#endif /* !_LIST_H */
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