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aulastlog-llist.c

/*
* aulastlog-llist.c - Minimal linked list library
* Copyright (c) 2008 Red Hat Inc., Durham, North Carolina.
* All Rights Reserved. 
*
* This software may be freely redistributed and/or modified under the
* terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Authors:
*   Steve Grubb <sgrubb@redhat.com>
*/

#include <stdlib.h>
#include <string.h>
#include "aulastlog-llist.h"

void list_create(llist *l)
{
      l->head = NULL;
      l->cur = NULL;
      l->cnt = 0;
}

lnode *list_next(llist *l)
{
      if (l->cur == NULL)
            return NULL;
      l->cur = l->cur->next;
      return l->cur;
}

void list_append(llist *l, lnode *node)
{
      lnode* newnode;

      newnode = malloc(sizeof(lnode));

      newnode->sec = node->sec;
      newnode->uid = node->uid;
      newnode->name = strdup(node->name);
      if (node->host)
            newnode->host = strdup(node->host);
      else
            newnode->host = NULL;
      if (node->term)
            newnode->term = strdup(node->term);
      else
            newnode->term = NULL;
      newnode->item = l->cnt; 
      newnode->next = NULL;

      // if we are at top, fix this up
      if (l->head == NULL)
            l->head = newnode;
      else  // Otherwise add pointer to newnode
            l->cur->next = newnode;

      // make newnode current
      l->cur = newnode;
      l->cnt++;
}

void list_clear(llist* l)
{
      lnode* nextnode;
      register lnode* current;

      current = l->head;
      while (current) {
            nextnode=current->next;
            free(current->name);
            free(current->host);
            free(current->term);
            free(current);
            current=nextnode;
      }
      l->head = NULL;
      l->cur = NULL;
      l->cnt = 0;
}

int list_update_login(llist* l, time_t t)
{
        register lnode* cur;
      if (l == NULL)
            return 0;

      cur=list_get_cur(l);
      cur->sec = t;
      return 1;
}

int list_update_host(llist* l, const char *h)
{
        register lnode* cur;
      if (l == NULL)
            return 0;

      cur=list_get_cur(l);
      if (h) {
            free(cur->host);
            cur->host = strdup(h);
      } else
            cur->host = NULL;
      return 1;
}

int list_update_term(llist* l, const char *t)
{
        register lnode* cur;
      if (l == NULL)
            return 0;

      cur=list_get_cur(l);
      if (t) {
            free(cur->term);
            cur->term = strdup(t);
      } else
            cur->term = NULL;
      return 1;
}

lnode *list_find_uid(llist *l, uid_t uid)
{
        register lnode* window;
                                                                                
            window = l->head; /* start at the beginning */
      while (window) {
            if (window->uid == uid) {
                  l->cur = window;
                  return window;
            } else
                  window = window->next;
      }
      return NULL;
}


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