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

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include "config.h"
   4
   5 /**
   6  * tlist - typesafe double linked list routines
   7  *
   8  * The list header contains routines for manipulating double linked lists;
   9  * this extends it so you can create list head types which only accomodate
  10  * a specific entry type.
  11  *
  12  * Example:
  13  *      #include <err.h>
  14  *      #include <stdio.h>
  15  *      #include <stdlib.h>
  16  *      #include <ccan/tlist/tlist.h>
  17  *
  18  *      // We could use TLIST_TYPE(children, struct child) to define this.
  19  *      struct tlist_children {
  20  *              struct list_head raw;
  21  *              TCON(struct child *canary);
  22  *      };
  23  *      struct parent {
  24  *              const char *name;
  25  *              struct tlist_children children;
  26  *              unsigned int num_children;
  27  *      };
  28  *
  29  *      struct child {
  30  *              const char *name;
  31  *              struct list_node list;
  32  *      };
  33  *
  34  *      int main(int argc, char *argv[])
  35  *      {
  36  *              struct parent p;
  37  *              struct child *c;
  38  *              unsigned int i;
  39  *
  40  *              if (argc < 2)
  41  *                      errx(1, "Usage: %s parent children...", argv[0]);
  42  *
  43  *              p.name = argv[1];
  44  *              tlist_init(&p.children);
  45  *              for (i = 2; i < argc; i++) {
  46  *                      c = malloc(sizeof(*c));
  47  *                      c->name = argv[i];
  48  *                      tlist_add(&p.children, c, list);
  49  *                      p.num_children++;
  50  *              }
  51  *
  52  *              printf("%s has %u children:", p.name, p.num_children);
  53  *              tlist_for_each(&p.children, c, list)
  54  *                      printf("%s ", c->name);
  55  *              printf("\n");
  56  *              return 0;
  57  *      }
  58  *
  59  * License: LGPL
  60  * Author: Rusty Russell <rusty@rustcorp.com.au>
  61  */
  62 int main(int argc, char *argv[])
  63 {
  64         if (argc != 2)
  65                 return 1;
  66
  67         if (strcmp(argv[1], "depends") == 0) {
  68                 printf("ccan/list\n");
  69                 printf("ccan/tcon\n");
  70                 return 0;
  71         }
  72
  73         return 1;
  74 }