#include <stdio.h>
#include "utlist.h"
typedef struct el {
int id;
struct el *next, *prev;
} el;
el *headA = NULL, *headB = NULL;
int main(int argc, char *argv[]) {
int i;
el els[10], *e;
for(i=0;i<10;i++) els[i].id='a'+i;
/* test DL macros */
printf("DL macros\n");
DL_APPEND(headA,&els[0]);
DL_APPEND(headA,&els[1]);
DL_APPEND(headA,&els[2]);
DL_FOREACH(headA,e) printf("%c ", e->id); printf("\n");
DL_APPEND(headB,&els[3]);
DL_APPEND(headB,&els[4]);
DL_APPEND(headB,&els[5]);
DL_FOREACH(headB,e) printf("%c ", e->id); printf("\n");
DL_CONCAT(headA,headB);
DL_FOREACH(headA,e) printf("%c ", e->id); printf("\n");
/* other variations */
headA = NULL;
DL_CONCAT(headA,headB);
DL_FOREACH(headA,e) printf("%c ", e->id); printf("\n");
headB = NULL;
DL_CONCAT(headA,headB);
DL_FOREACH(headA,e) printf("%c ", e->id); printf("\n");
headA=NULL;
headB=NULL;
DL_APPEND(headA,&els[0]);
DL_APPEND(headB,&els[1]);
DL_CONCAT(headA,headB);
DL_FOREACH(headA,e) printf("%c ", e->id); printf("\n");
return 0;
}