git.ozlabs.org Git - ccan/blob - ccan/list/test/run-list_prev-list_next.c

   1 #include <ccan/list/list.h>
   2 #include <ccan/tap/tap.h>
   3 #include <ccan/list/list.c>
   4 #include "helper.h"
   5
   6 struct parent {
   7         const char *name;
   8         unsigned int num_children;
   9         struct list_head children;
  10 };
  11
  12 struct child {
  13         const char *name;
  14         struct list_node list;
  15 };
  16
  17 int main(int argc, char *argv[])
  18 {
  19         struct parent parent;
  20         struct child c1, c2, c3;
  21         const struct parent *p;
  22         const struct child *c;
  23
  24         plan_tests(20);
  25         parent.num_children = 0;
  26         list_head_init(&parent.children);
  27
  28         c1.name = "c1";
  29         list_add(&parent.children, &c1.list);
  30
  31         ok1(list_next(&parent.children, &c1, list) == NULL);
  32         ok1(list_prev(&parent.children, &c1, list) == NULL);
  33
  34         c2.name = "c2";
  35         list_add_tail(&parent.children, &c2.list);
  36
  37         ok1(list_next(&parent.children, &c1, list) == &c2);
  38         ok1(list_prev(&parent.children, &c1, list) == NULL);
  39         ok1(list_next(&parent.children, &c2, list) == NULL);
  40         ok1(list_prev(&parent.children, &c2, list) == &c1);
  41
  42         c3.name = "c3";
  43         list_add_tail(&parent.children, &c3.list);
  44
  45         ok1(list_next(&parent.children, &c1, list) == &c2);
  46         ok1(list_prev(&parent.children, &c1, list) == NULL);
  47         ok1(list_next(&parent.children, &c2, list) == &c3);
  48         ok1(list_prev(&parent.children, &c2, list) == &c1);
  49         ok1(list_next(&parent.children, &c3, list) == NULL);
  50         ok1(list_prev(&parent.children, &c3, list) == &c2);
  51
  52         /* Const variants */
  53         p = &parent;
  54         c = &c2;
  55         ok1(list_next(&p->children, &c1, list) == &c2);
  56         ok1(list_prev(&p->children, &c1, list) == NULL);
  57         ok1(list_next(&p->children, c, list) == &c3);
  58         ok1(list_prev(&p->children, c, list) == &c1);
  59         ok1(list_next(&parent.children, c, list) == &c3);
  60         ok1(list_prev(&parent.children, c, list) == &c1);
  61         ok1(list_next(&p->children, &c3, list) == NULL);
  62         ok1(list_prev(&p->children, &c3, list) == &c2);
  63
  64         return exit_status();
  65 }