diff --git a/src/cw/cfg.c b/src/cw/cfg.c
new file mode 100644
index 00000000..a99a848e
--- /dev/null
+++ b/src/cw/cfg.c
@@ -0,0 +1,69 @@
+#include <string.h>
+
+#include <mavl.h>
+
+#include "cw.h"
+#include "cfg.h"
+
+struct cfg_entry{
+	char *key;
+	char *val;
+};
+
+static int cmp(const void *k1,const void*k2){
+	struct cfg_entry * e1,*e2;
+	e1=(struct cfg_entry *)k1;
+	e2=(struct cfg_entry *)k2;
+	return strcmp(e1->key,e2->key);
+}
+
+static void del(void *ptr)
+{
+	struct cfg_entry * e;
+	e=(struct cfg_entry *)ptr;
+	free(e->key);
+	free(e->val);
+}
+
+
+cw_Cfg_t * cfg_create()
+{
+	return mavl_create(cmp, del, sizeof(struct cfg_entry));
+}	
+
+int cfg_set(cw_Cfg_t * cfg,const char *key, const char *val)
+{
+	struct cfg_entry e;
+	int replaced;
+
+	e.key = cw_strdup(key);
+	if (!e.key)
+		return 0;
+	e.val = cw_strdup(val);
+	if (!e.val){
+		free(e.key);
+		return 0;
+	}
+	void * rc = mavl_replace(cfg,&e,&replaced);
+	if (!rc){
+		del(&e);
+		return 0;
+	}
+
+	if (!replaced)
+		return 1;
+	return -1;
+}
+
+void cw_Cfg_dump(cw_Cfg_t *cfg)
+{
+	mavliter_t it;
+	struct cfg_entry *e;
+	mavliter_init(&it,cfg);
+	mavliter_foreach(&it){
+		
+		e = mavliter_get(&it);
+		printf("%s: %s\n",e->key,e->val);
+		//cw_dbg(dbglevel,"%s%s :%s: %s",prefix,data->key,type->get_type_name(data), value);
+	}
+}
diff --git a/src/cw/cfg.h b/src/cw/cfg.h
new file mode 100644
index 00000000..b480147f
--- /dev/null
+++ b/src/cw/cfg.h
@@ -0,0 +1,13 @@
+#ifndef _CFG_H
+#define _CFG_H
+
+#include <mavl.h>
+
+typedef struct mavl cw_Cfg_t;
+
+cw_Cfg_t * cfg_create();
+int cfg_set(cw_Cfg_t *cfg,const char *key, const char *val);
+void cw_Cfg_dump(cw_Cfg_t *cfg);
+
+#endif
+