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#include <stdio.h>
#include "utlist.h"
typedef struct el {
int id;
struct el *next, *prev;
} el;
int main()
{
int i;
el els[10], *e;
el *head = NULL;
for(i=0; i<10; i++) {
els[i].id=(int)'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);
}
printf("\n");
/* point head to head->next */
printf("advancing head pointer\n");
head = head->next;
CDL_FOREACH(head,e) {
printf("%c ", e->id);
}
printf("\n");
/* follow circular loop a few times */
for(i=0,e=head; e && i<10; i++,e=e->next) {
printf("%c ", e->id);
}
printf("\n");
/* follow circular loop backwards a few times */
for(i=0,e=head; e && i<10; i++,e=e->prev) {
printf("%c ", e->id);
}
printf("\n");
printf("deleting b\n");
CDL_DELETE(head,&els[1]);
CDL_FOREACH(head,e) {
printf("%c ", e->id);
}
printf("\n");
printf("deleting head (a)\n");
CDL_DELETE(head,&els[0]);
CDL_FOREACH(head,e) {
printf("%c ", e->id);
}
printf("\n");
printf("deleting new head (c)\n");
CDL_DELETE(head,&els[2]);
CDL_FOREACH(head,e) {
printf("%c ", e->id);
}
printf("\n");
/* test DL macros */
printf("DL macros\n");
DL_PREPEND(head,&els[0]);
DL_PREPEND(head,&els[1]);
DL_PREPEND(head,&els[2]);
DL_FOREACH(head,e) {
printf("%c ", e->id);
}
printf("\n");
printf("deleting c\n");
DL_DELETE(head,&els[2]);
DL_FOREACH(head,e) {
printf("%c ", e->id);
}
printf("\n");
printf("deleting a\n");
DL_DELETE(head,&els[0]);
DL_FOREACH(head,e) {
printf("%c ", e->id);
}
printf("\n");
printf("deleting b\n");
DL_DELETE(head,&els[1]);
DL_FOREACH(head,e) {
printf("%c ", e->id);
}
printf("\n");
/* test LL macros */
printf("LL macros\n");
LL_PREPEND(head,&els[0]);
LL_PREPEND(head,&els[1]);
LL_PREPEND(head,&els[2]);
LL_FOREACH(head,e) {
printf("%c ", e->id);
}
printf("\n");
printf("deleting c\n");
LL_DELETE(head,&els[2]);
LL_FOREACH(head,e) {
printf("%c ", e->id);
}
printf("\n");
printf("deleting a\n");
LL_DELETE(head,&els[0]);
LL_FOREACH(head,e) {
printf("%c ", e->id);
}
printf("\n");
printf("deleting b\n");
LL_DELETE(head,&els[1]);
LL_FOREACH(head,e) {
printf("%c ", e->id);
}
printf("\n");
return 0;
}
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