more progress in new ktv storage

FossilOrigin-Name: a2c26a366de1946feb707439302b22de2e3d02f7621d0834fdf242852b28639c

src/cw/cw_ktv_get.c

@@ -0,0 +1,23 @@
+#include "ktv.h"
+#include "mavl.h"
+
+cw_KTV_t * cw_ktv_get(mavl_t ktv, const char *key, const cw_Type_t * type)
+{
+	cw_KTV_t search, *result;
+	/* we can safely cast from const char * to char *, because
+	 * we never will use the search varaiable to store ktv values */
+	search.key=(char*)key;
+	
+	result = mavl_get(ktv,&search);
+	if (result == NULL){
+		return NULL;
+	}
+	if (type == NULL){
+		return result;
+	}
+	if (strcmp(type->name,result->type->name)==0){
+		return result;
+	}
+	
+	return NULL;
+}