1 files changed, 104 insertions, 0 deletions
diff --git a/src/llist.c b/src/llist.c
new file mode 100644
index 0000000..371ad89
--- /dev/null
+++ b/src/llist.c
@@ -0,0 +1,104 @@
+#include "llist.h"
+#include "util_rt.h"
+
+
+void prne_init_llist (prne_llist_t *llist) {
+	llist->head = NULL;
+	llist->tail = NULL;
+	llist->size = 0;
+}
+
+void prne_free_llist (prne_llist_t *llist) {
+	prne_llist_clear(llist);
+}
+
+void prne_llist_clear (prne_llist_t *llist) {
+	struct prne_llist_entry *cur = llist->head, *next;
+
+	while (cur != NULL) {
+		next = cur->next;
+		prne_free(cur);
+		cur = next;
+	}
+
+	llist->head = llist->tail = NULL;
+	llist->size = 0;
+}
+
+prne_llist_entry_t *prne_llist_insert (prne_llist_t *llist, prne_llist_entry_t *entry, void *element) {
+	prne_llist_entry_t *ny;
+
+	if (entry == NULL) {
+		return prne_llist_append(llist, element);
+	}
+
+	ny = (prne_llist_entry_t*)prne_malloc(sizeof(prne_llist_entry_t), 1);
+	if (ny == NULL) {
+		return NULL;
+	}
+	ny->prev = entry;
+	ny->next = entry->next;
+	ny->element = element;
+	if (entry->next != NULL) {
+		entry->next->prev = ny;
+	}
+	else {
+		llist->tail = ny;
+	}
+	entry->next = ny;
+
+	llist->size += 1;
+	return ny;
+}
+
+prne_llist_entry_t *prne_llist_append (prne_llist_t *llist, void *element) {
+	prne_llist_entry_t *ny = (prne_llist_entry_t*)prne_malloc(sizeof(prne_llist_entry_t), 1);
+
+	if (ny == NULL) {
+		return NULL;
+	}
+	ny->next = NULL;
+	ny->element = element;
+
+	if (llist->tail == NULL) {
+		llist->head = llist->tail = ny;
+		ny->prev = NULL;
+	}
+	else {
+		llist->tail->next = ny;
+		ny->prev = llist->tail;
+		llist->tail = ny;
+	}
+
+	llist->size += 1;
+	return ny;
+}
+
+prne_llist_entry_t *prne_llist_erase (prne_llist_t *llist, prne_llist_entry_t *entry) {
+	prne_llist_entry_t *ret;
+
+	if (entry == NULL) {
+		return NULL;
+	}
+
+	if (entry == llist->head && entry == llist->tail) {
+		llist->head = llist->tail = NULL;
+		ret = NULL;
+	}
+	else if (entry == llist->head) {
+		ret = llist->head = llist->head->next;
+		llist->head->prev = NULL;
+	}
+	else if (entry == llist->tail) {
+		ret = llist->tail = llist->tail->prev;
+		llist->tail->next = NULL;
+	}
+	else {
+		ret = entry->prev->next = entry->next;
+		entry->next->prev = entry->prev;
+	}
+
+	prne_free(entry);
+	llist->size -= 1;
+	return ret;
+}