ChanUser.c

   1
   2 #include "ChanUser.h"
   3 #include "ChanNode.h"
   4 #include "UserNode.h"
   5
   6 struct ChanUser* addChanUser(struct ChanNode *chan, struct UserNode *user) {
   7     struct ChanUser *chanuser = malloc(sizeof(*chan));
   8     if (!chanuser)
   9     {
  10         perror("malloc() failed");
  11         return NULL;
  12     }
  13     chanuser->user = user;
  14     chanuser->chan = chan;
  15
  16     chanuser->next_user = chan->user;
  17     chan->user = chanuser;
  18
  19     chanuser->next_chan = user->channel;
  20     user->channel = chanuser;
  21
  22     return chanuser;
  23 }
  24
  25 int isUserOnChan(struct UserNode *user, struct ChanNode *chan) {
  26     struct ChanUser *chanuser;
  27     for(chanuser = user->channel; chanuser; chanuser = chanuser->next_chan) {
  28         if(chanuser->chan == chan)
  29             return 1;
  30     }
  31     return 0;
  32 }
  33
  34 struct ChanUser* getChanUser(struct UserNode *user, struct ChanNode *chan) {
  35     struct ChanUser *chanuser;
  36     for(chanuser = user->channel; chanuser; chanuser = chanuser->next_chan) {
  37         if(chanuser->chan == chan)
  38             return chanuser;
  39     }
  40     return NULL;
  41 }
  42
  43 struct ChanUser* getChannelUsers(struct ChanNode *chan, struct ChanUser *last) {
  44     if(last == NULL)
  45         return chan->user;
  46     else
  47         return last->next_user;
  48 }
  49
  50 struct ChanUser* getUserChannels(struct UserNode *user, struct ChanUser *last) {
  51     if(last == NULL)
  52         return user->channel;
  53     else
  54         return last->next_chan;
  55 }
  56
  57 void delChanUser(struct ChanUser *chanuser, int freeChanUser) {
  58     struct ChanUser *cchanuser, *last;
  59     //remove it from the user's channel-list
  60     last = NULL;
  61     for(cchanuser = chanuser->user->channel; cchanuser; cchanuser = cchanuser->next_chan) {
  62         if(cchanuser == chanuser) {
  63             if(last)
  64                 last->next_chan = chanuser->next_chan;
  65             else
  66                 chanuser->user->channel = chanuser->next_chan;
  67             break;
  68         } else
  69             last = cchanuser;
  70     }
  71
  72     //remove it from the channel's user-list
  73     last = NULL;
  74     for(cchanuser = chanuser->chan->user; cchanuser; cchanuser = cchanuser->next_user) {
  75         if(cchanuser == chanuser) {
  76             if(last)
  77                 last->next_user = chanuser->next_user;
  78             else
  79                 chanuser->chan->user = chanuser->next_user;
  80             break;
  81         } else
  82             last = cchanuser;
  83     }
  84
  85     if(freeChanUser)
  86         free(chanuser);
  87     else {
  88         chanuser->next_chan = NULL;
  89         chanuser->next_user = NULL;
  90     }
  91 }
  92
  93 void removeChanUserFromLists(struct ChanUser *chanuser, int remove_from_userlist, int remove_from_channellist, int freeChanUser) {
  94     struct ChanUser *cchanuser, *last;
  95     if(remove_from_userlist) {
  96         //remove it from the channel's user-list
  97         last = NULL;
  98         for(cchanuser = chanuser->chan->user; cchanuser; cchanuser = cchanuser->next_user) {
  99             if(cchanuser == chanuser) {
 100                 if(last)
 101                     last->next_user = chanuser->next_user;
 102                 else
 103                     chanuser->chan->user = chanuser->next_user;
 104                 break;
 105             } else
 106                 last = cchanuser;
 107         }
 108         chanuser->next_user = NULL;
 109     }
 110     if(remove_from_channellist) {
 111         //remove it from the user's channel-list
 112         last = NULL;
 113         for(cchanuser = chanuser->user->channel; cchanuser; cchanuser = cchanuser->next_chan) {
 114             if(cchanuser == chanuser) {
 115                 if(last)
 116                     last->next_chan = chanuser->next_chan;
 117                 else
 118                     chanuser->user->channel = chanuser->next_chan;
 119                 break;
 120             } else
 121                 last = cchanuser;
 122         }
 123         chanuser->next_chan = NULL;
 124     }
 125
 126     if(freeChanUser)
 127         free(chanuser);
 128 }
 129