rdoff/collectn.c

   1 /*
   2  * collectn.c - implements variable length pointer arrays [collections].
   3  *
   4  * This file is public domain.
   5  */
   6
   7 #include "collectn.h"
   8 #include <stdlib.h>
   9
  10 void collection_init(Collection * c)
  11 {
  12     int i;
  13
  14     for (i = 0; i < 32; i++)
  15         c->p[i] = NULL;
  16     c->next = NULL;
  17 }
  18
  19 void **colln(Collection * c, int index)
  20 {
  21     while (index >= 32) {
  22         index -= 32;
  23         if (c->next == NULL) {
  24             c->next = malloc(sizeof(Collection));
  25             collection_init(c->next);
  26         }
  27         c = c->next;
  28     }
  29     return &(c->p[index]);
  30 }
  31
  32 void collection_reset(Collection * c)
  33 {
  34     int i;
  35
  36     if (c->next) {
  37         collection_reset(c->next);
  38         free(c->next);
  39     }
  40
  41     c->next = NULL;
  42     for (i = 0; i < 32; i++)
  43         c->p[i] = NULL;
  44 }