1 files changed, 32 insertions, 0 deletions
diff --git a/src/search/insque.c b/src/search/insque.c
new file mode 100644
index 00000000..b7475d84
--- /dev/null
+++ b/src/search/insque.c
@@ -0,0 +1,32 @@
+#include <search.h>
+
+struct node {
+	struct node *next;
+	struct node *prev;
+};
+
+void insque(void *element, void *pred)
+{
+	struct node *e = element;
+	struct node *p = pred;
+
+	if (!p) {
+		e->next = e->prev = 0;
+		return;
+	}
+	e->next = p->next;
+	e->prev = p;
+	p->next = e;
+	if (e->next)
+		e->next->prev = e;
+}
+
+void remque(void *element)
+{
+	struct node *e = element;
+
+	if (e->next)
+		e->next->prev = e->prev;
+	if (e->prev)
+		e->prev->next = e->next;
+}