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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "utlist.h"
#define BUFLEN 20
typedef struct el {
char bname[BUFLEN];
struct el *next, *prev;
} el;
static int namecmp(void *_a, void *_b)
{
el *a = (el*)_a;
el *b = (el*)_b;
return strcmp(a->bname,b->bname);
}
int main()
{
el *name, *tmp;
el *head = NULL;
char linebuf[BUFLEN];
FILE *file;
file = fopen( "test11.dat", "r" );
if (file == NULL) {
perror("can't open: ");
exit(-1);
}
while (fgets(linebuf,BUFLEN,file) != NULL) {
name = (el*)malloc(sizeof(el));
if (name == NULL) {
exit(-1);
}
strcpy(name->bname, linebuf);
DL_APPEND(head, name);
}
DL_SORT(head, namecmp);
DL_FOREACH(head,tmp) {
printf("%s", tmp->bname);
}
/* now delete the list head */
printf("deleting head %shead->prev: %s", head->bname, head->prev->bname);
DL_DELETE(head,head);
DL_FOREACH(head,tmp) {
printf("%s", tmp->bname);
}
fclose(file);
return 0;
}
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