git.ozlabs.org Git - ccan/blob - ccan/list/_info

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include "config.h"
   4
   5 /**
   6  * list - double linked list routines
   7  *
   8  * The list header contains routines for manipulating double linked lists.
   9  * It defines two types: struct list_head used for anchoring lists, and
  10  * struct list_node which is usually embedded in the structure which is placed
  11  * in the list.
  12  *
  13  * Example:
  14  *      #include <err.h>
  15  *      #include <stdio.h>
  16  *      #include <stdlib.h>
  17  *      #include <ccan/list/list.h>
  18  *
  19  *      struct parent {
  20  *              const char *name;
  21  *              struct list_head children;
  22  *              unsigned int num_children;
  23  *      };
  24  *
  25  *      struct child {
  26  *              const char *name;
  27  *              struct list_node list;
  28  *      };
  29  *
  30  *      int main(int argc, char *argv[])
  31  *      {
  32  *              struct parent p;
  33  *              struct child *c;
  34  *              unsigned int i;
  35  *
  36  *              if (argc < 2)
  37  *                      errx(1, "Usage: %s parent children...", argv[0]);
  38  *
  39  *              p.name = argv[1];
  40  *              list_head_init(&p.children);
  41  *              for (i = 2; i < argc; i++) {
  42  *                      c = malloc(sizeof(*c));
  43  *                      c->name = argv[i];
  44  *                      list_add(&p.children, &c->list);
  45  *                      p.num_children++;
  46  *              }
  47  *
  48  *              printf("%s has %u children:", p.name, p.num_children);
  49  *              list_for_each(&p.children, c, list)
  50  *                      printf("%s ", c->name);
  51  *              printf("\n");
  52  *              return 0;
  53  *      }
  54  *
  55  * License: LGPL (2 or any later version)
  56  * Author: Rusty Russell <rusty@rustcorp.com.au>
  57  */
  58 int main(int argc, char *argv[])
  59 {
  60         if (argc != 2)
  61                 return 1;
  62
  63         if (strcmp(argv[1], "depends") == 0) {
  64                 printf("ccan/container_of\n");
  65                 return 0;
  66         }
  67
  68         return 1;
  69 }