X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=libsysfs%2Fdlist.c;h=b440d65bed0f0f1fb7b8be5fa69999c6ba8a0692;hb=da767d0739c86a04a0c0326cebff6c08ffe1228c;hp=6dfcf726baed68e8aa595416a321718e6e3da43c;hpb=fe3fe3b29ffbc7d0ce7dca6a371da31d8b3ff7f8;p=elogind.git

diff --git a/libsysfs/dlist.c b/libsysfs/dlist.c
index 6dfcf726b..b440d65be 100644
--- a/libsysfs/dlist.c
+++ b/libsysfs/dlist.c
@@ -27,6 +27,7 @@
  * delete function.  Otherwise dlist will just use free.
 
 */
+#include <stdlib.h>
 #include "dlist.h"
 
 /*
@@ -73,14 +74,14 @@ inline void *_dlist_mark_move(Dlist *list,int direction)
 {
   if(direction)
     {
-      if( list->marker->next!=NULL)
+      if( list->marker && list->marker->next!=NULL)
 	list->marker=list->marker->next;
       else
 	return(NULL);
     }
   else
     {
-      if( list->marker->prev!=NULL)
+      if( list->marker && list->marker->prev!=NULL)
 	list->marker=list->marker->prev;
       else
 	return(NULL);
@@ -259,6 +260,16 @@ void dlist_unshift(Dlist *list,void *data)
   dlist_insert(list,data,0);
 }
 
+void dlist_unshift_sorted(Dlist *list, void *data, 
+			int (*sorter)(void *new, void *old))
+{
+	if (list->count == 0)
+		dlist_unshift(list, data);
+	else {
+		list->marker=list->head->next;
+		dlist_insert_sorted(list, data, sorter);
+	}
+}
 
 /* 
  * Remove end node from list.