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->flags = 0;
  14     chanuser->user = user;
  15     chanuser->chan = chan;
  16
  17     chanuser->next_user = chan->user;
  18     chan->user = chanuser;
  19
  20     chanuser->next_chan = user->channel;
  21     user->channel = chanuser;
  22
  23     return chanuser;
  24 }
  25
  26 int isUserOnChan(struct UserNode *user, struct ChanNode *chan) {
  27     struct ChanUser *chanuser;
  28     for(chanuser = user->channel; chanuser; chanuser = chanuser->next_chan) {
  29         if(chanuser->chan == chan)
  30             return 1;
  31     }
  32     return 0;
  33 }
  34
  35 struct ChanUser* getChanUser(struct UserNode *user, struct ChanNode *chan) {
  36     struct ChanUser *chanuser;
  37     for(chanuser = user->channel; chanuser; chanuser = chanuser->next_chan) {
  38         if(chanuser->chan == chan)
  39             return chanuser;
  40     }
  41     return NULL;
  42 }
  43
  44 struct ChanUser* getChannelUsers(struct ChanNode *chan, struct ChanUser *last) {
  45     if(last == NULL)
  46         return chan->user;
  47     else
  48         return last->next_user;
  49 }
  50
  51 struct ChanUser* getUserChannels(struct UserNode *user, struct ChanUser *last) {
  52     if(last == NULL)
  53         return user->channel;
  54     else
  55         return last->next_chan;
  56 }
  57
  58 void delChanUser(struct ChanUser *chanuser, int freeChanUser) {
  59     struct ChanUser *cchanuser, *last;
  60     //remove it from the user's channel-list
  61     last = NULL;
  62     for(cchanuser = chanuser->user->channel; cchanuser; cchanuser = cchanuser->next_chan) {
  63         if(cchanuser == chanuser) {
  64             if(last)
  65                 last->next_chan = chanuser->next_chan;
  66             else
  67                 chanuser->user->channel = chanuser->next_chan;
  68             break;
  69         } else
  70             last = cchanuser;
  71     }
  72
  73     //remove it from the channel's user-list
  74     last = NULL;
  75     for(cchanuser = chanuser->chan->user; cchanuser; cchanuser = cchanuser->next_user) {
  76         if(cchanuser == chanuser) {
  77             if(last)
  78                 last->next_user = chanuser->next_user;
  79             else
  80                 chanuser->chan->user = chanuser->next_user;
  81             break;
  82         } else
  83             last = cchanuser;
  84     }
  85
  86     if(freeChanUser)
  87         free(chanuser);
  88     else {
  89         chanuser->next_chan = NULL;
  90         chanuser->next_user = NULL;
  91     }
  92 }
  93
  94 void removeChanUserFromLists(struct ChanUser *chanuser, int remove_from_userlist, int remove_from_channellist, int freeChanUser) {
  95     struct ChanUser *cchanuser, *last;
  96     if(remove_from_userlist) {
  97         //remove it from the channel's user-list
  98         last = NULL;
  99         for(cchanuser = chanuser->chan->user; cchanuser; cchanuser = cchanuser->next_user) {
 100             if(cchanuser == chanuser) {
 101                 if(last)
 102                     last->next_user = chanuser->next_user;
 103                 else
 104                     chanuser->chan->user = chanuser->next_user;
 105                 break;
 106             } else
 107                 last = cchanuser;
 108         }
 109         chanuser->next_user = NULL;
 110     }
 111     if(remove_from_channellist) {
 112         //remove it from the user's channel-list
 113         last = NULL;
 114         for(cchanuser = chanuser->user->channel; cchanuser; cchanuser = cchanuser->next_chan) {
 115             if(cchanuser == chanuser) {
 116                 if(last)
 117                     last->next_chan = chanuser->next_chan;
 118                 else
 119                     chanuser->user->channel = chanuser->next_chan;
 120                 break;
 121             } else
 122                 last = cchanuser;
 123         }
 124         chanuser->next_chan = NULL;
 125     }
 126
 127     if(freeChanUser)
 128         free(chanuser);
 129 }
 130