Move dlist_add() to lib/llist.c

2 files changed, 18 insertions, 2 deletions

diff --git a/lib/lib.h b/lib/lib.h
index afc3a8b2..ee073e0c 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -8,8 +8,6 @@
 ssize_t getline(char **lineptr, size_t *n, FILE *stream);
 
 // llist.c
-void llist_free(void *list, void (*freeit)(void *data));
-void *llist_pop(void *list);  // actually void **list, but the compiler's dumb
 
 struct string_list {
 	struct string_list *next;
@@ -27,6 +25,10 @@ struct double_list {
 	char *data;
 };
 
+void llist_free(void *list, void (*freeit)(void *data));
+void *llist_pop(void *list);  // actually void **list, but the compiler's dumb
+void dlist_add(struct double_list **list, char *data);
+
 // args.c
 void get_optflags(void);
 
diff --git a/lib/llist.c b/lib/llist.c
index 8d6fd265..4f9bc220 100644
--- a/lib/llist.c
+++ b/lib/llist.c
@@ -30,3 +30,17 @@ void *llist_pop(void *list)
 
 	return (void *)next;
 }
+
+// Add an entry to the end off a doubly linked list
+void dlist_add(struct double_list **list, char *data)
+{
+	struct double_list *line = xmalloc(sizeof(struct double_list));
+
+	line->data = data;
+	if (*list) {
+		line->next = *list;
+		line->prev = (*list)->prev;
+		(*list)->prev->next = line;
+		(*list)->prev = line;
+	} else *list = line->next = line->prev = line;
+}