#include <stdio.h>

#include "utlist.h"

typedef struct el {

    int id;

    struct el *next, *prev;

} el;

el *head = NULL;

int main(int argc, char *argv[]) {

    int i;

    el els[10], *e, *tmp, *tmp2;

    for(i=0;i<10;i++) els[i].id='a'+i;

    /* test CDL macros */

    printf("CDL macros\n");

    CDL_PREPEND(head,&els[0]);

    CDL_PREPEND(head,&els[1]);

    CDL_PREPEND(head,&els[2]);

    CDL_FOREACH(head,e) printf("%c ", e->id); 

    /* point head to head->next */

    CDL_FOREACH_SAFE(head,e,tmp,tmp2) {

        printf("deleting %c ", e->id); 

        CDL_DELETE(head,e);

    }

    printf("\n");

    if (head) printf("non-null head\n");

    /* test DL macros */

    printf("DL macros\n");

    DL_APPEND(head,&els[0]);

    DL_APPEND(head,&els[1]);

    DL_APPEND(head,&els[2]);

    DL_FOREACH(head,e) printf("%c ", e->id); 

    DL_FOREACH_SAFE(head,e,tmp) {

        printf("deleting %c ", e->id); 

        DL_DELETE(head,e);

    }

    printf("\n");

    if (head) printf("non-null head\n");

    /* test LL macros */

    printf("LL macros\n");

    LL_APPEND(head,&els[0]);

    LL_APPEND(head,&els[1]);

    LL_APPEND(head,&els[2]);

    LL_FOREACH(head,e) printf("%c ", e->id);

    LL_FOREACH_SAFE(head,e,tmp) {

        printf("deleting %c ", e->id); 

        LL_DELETE(head,e);

    }

    printf("\n");

    if (head) printf("non-null head\n");

    return 0;

}