initial version of powersensordaemon

[svn42.git] / powersensordaemon / client_list.c

diff --git a/powersensordaemon/client_list.c b/powersensordaemon/client_list.c
new file mode 100644 (file)
index 0000000..f136f8e
--- /dev/null
+++ b/powersensordaemon/client_list.c
@@ -0,0 +1,120 @@
+/*
+ *  powersensordaemon
+ *
+ *  Copyright (C) 2009 Christian Pointner <equinox@spreadspace.org>
+ *
+ *  This file is part of powersensordaemon.
+ *
+ *  powersensordaemon is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  powersensordaemon 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 powersensordaemon. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+
+#include "client_list.h"
+#include "datatypes.h"
+
+client_t* client_get_last(client_t* first)
+{
+  if(!first) 
+    return NULL;
+
+  while(first->next) {
+    first = first->next;
+  }
+
+  return first;
+}
+
+int client_add(client_t** first, int fd)
+{
+  if(!first)
+    return -1;
+
+  client_t* new_client = malloc(sizeof(client_t));
+  if(!new_client)
+    return -2;
+
+  new_client->fd = fd;
+  new_client->request_listener = 0;
+  new_client->error_listener = 0;
+  new_client->temp_listener = 0;
+  new_client->photo_listener = 0;
+  new_client->movement_listener = 0;
+  new_client->button_listener = 0;
+  new_client->next = NULL;
+  new_client->buffer.offset = 0;
+
+  if(!(*first)) {
+    *first = new_client;
+    return 0;
+  }
+    
+  client_get_last(*first)->next = new_client;
+
+  return 0;
+}
+
+void client_remove(client_t** first, int fd)
+{
+  if(!first || !(*first)) 
+    return;
+
+  client_t* deletee = *first;
+  if((*first)->fd == fd) {
+    *first = (*first)->next;
+    close(deletee->fd);
+    free(deletee);
+    return;
+  }
+
+  client_t* prev = deletee;
+  deletee = deletee->next;
+  while(deletee) {
+    if(deletee->fd == fd) {
+      prev->next = deletee->next;
+      close(deletee->fd);
+      free(deletee);
+      return;
+    }
+    prev = deletee;
+    deletee = deletee->next;
+  }
+}
+
+client_t* client_find(client_t* first, int fd)
+{
+  if(!first)
+    return NULL;
+  
+  while(first) {
+    if(first->fd == fd)
+      return first;
+
+    first = first->next;
+  }
+  return NULL;
+}
+
+void client_clear(client_t** first)
+{
+  if(!first || !(*first)) 
+    return;
+
+  while(*first) {
+    client_t* deletee = *first;
+    *first = (*first)->next;
+    close(deletee->fd);
+    free(deletee);
+  }
+}