ll.c

   1 // L2TPNS Linked List Stuff
   2 // $Id: ll.c,v 1.2 2004/03/05 00:09:03 fred_nerk Exp $
   3
   4 #include <stdio.h>
   5 #include <sys/file.h>
   6 #include <sys/stat.h>
   7 #include <malloc.h>
   8 #include <string.h>
   9 #include <stdlib.h>
  10 #include <time.h>
  11 #include <arpa/inet.h>
  12 #include <errno.h>
  13 #include <unistd.h>
  14 #include "ll.h"
  15
  16 linked_list *ll_init()
  17 {
  18     return (linked_list *)calloc(sizeof(linked_list), 1);
  19 }
  20
  21 void ll_done(linked_list *l)
  22 {
  23     li *i = l->head, *n;
  24
  25     while (i)
  26     {
  27         n = i->next;
  28         free(i);
  29         i = n;
  30     }
  31
  32     free(l);
  33 }
  34
  35 li *ll_push(linked_list *l, void *data)
  36 {
  37     li *i;
  38
  39     if (!l) return NULL;
  40     if (!(i = (li *)calloc(sizeof(li), 1))) return NULL;
  41
  42     i->data = data;
  43     i->next = NULL;
  44     if (l->end)
  45         l->end->next = i;
  46     else
  47         l->head = i;
  48     l->end = i;
  49
  50     return i;
  51 }
  52
  53 void *ll_pop(linked_list *l)
  54 {
  55     li *i;
  56     void *data;
  57
  58     if (!l) return NULL;
  59     if (!l->head)
  60         return NULL;
  61
  62     data = l->head->data;
  63     i = l->head->next;
  64     free(l->head);
  65     l->head = i;
  66     return data;
  67 }
  68
  69 void ll_iterate(linked_list *l, int(*func)(void *))
  70 {
  71     li *i;
  72     if (!l || !func) return;
  73
  74     for (i = l->head; i; i = i->next)
  75     {
  76         if (i->data)
  77             if (!func(i))
  78                 break;
  79     }
  80 }
  81
  82 void ll_reset(linked_list *l)
  83 {
  84     if (!l) return;
  85     l->current = NULL;
  86 }
  87
  88 void *ll_next(linked_list *l)
  89 {
  90     if (!l) return NULL;
  91     if (!l->current)
  92         l->current = l->head;
  93     else
  94         l->current = l->current->next;
  95     if (!l->current)
  96         return NULL;
  97     return l->current->data;
  98 }
  99
 100 void ll_delete(linked_list *l, void *data)
 101 {
 102     li *i = l->head, *p = NULL;
 103
 104     while (i)
 105     {
 106         if (i->data == data)
 107         {
 108             if (l->head == i) l->head = i->next;
 109             if (l->end == i) l->end = i->next;
 110             if (p) p->next = i->next;
 111             free(i);
 112             l->current = NULL;
 113             return;
 114         }
 115         p = i;
 116         i = i->next;
 117     }
 118 }
 119
 120 int ll_size(linked_list *l)
 121 {
 122     int count = 0;
 123     li *i;
 124
 125     if (!l) return 0;
 126
 127     for (i = l->head; i; i = i->next)
 128         if (i->data) count++;
 129
 130     return count;
 131 }
 132
 133 int ll_contains(linked_list *l, void *search)
 134 {
 135     li *i;
 136     for (i = l->head; i; i = i->next)
 137         if (i->data == search)
 138             return 1;
 139     return 0;
 140 }
 141