From: Bart Polot <bart.polot+gnunet@gmail.com>
Date: Mon, 20 Feb 2017 18:13:59 +0000 (+0100)
Subject: Refactor copying of handler arrays
X-Git-Tag: taler-0.2.1~126
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=ba5817a7dbaef67b871606431d9a9a7f82d5bdf8;p=oweals%2Fgnunet.git

Refactor copying of handler arrays
---

diff --git a/src/cadet/cadet_api_new.c b/src/cadet/cadet_api_new.c
index 673764813..7ed681a9d 100644
--- a/src/cadet/cadet_api_new.c
+++ b/src/cadet/cadet_api_new.c
@@ -1635,17 +1635,7 @@ GNUNET_CADET_open_porT (struct GNUNET_CADET_Handle *h,
   p->cls = connects_cls;
   p->window_changes = window_changes;
   p->disconnects = disconnects;
-  if (NULL != handlers)
-  {
-    unsigned int i;
-
-    for (i=0;NULL != handlers[i].cb; i++) ;
-    p->handlers = GNUNET_new_array (i + 1,
-                                    struct GNUNET_MQ_MessageHandler);
-    GNUNET_memcpy ((struct GNUNET_MQ_MessageHandler *) p->handlers,
-                   handlers,
-                   i * sizeof (struct GNUNET_MQ_MessageHandler));
-  }
+  p->handlers = GNUNET_MQ_copy_handlers (handlers);
 
   GNUNET_assert (GNUNET_OK ==
 		 GNUNET_CONTAINER_multihashmap_put (h->ports,
diff --git a/src/core/core_api.c b/src/core/core_api.c
index afae20850..c1cfdb62f 100644
--- a/src/core/core_api.c
+++ b/src/core/core_api.c
@@ -784,7 +784,6 @@ GNUNET_CORE_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
                      const struct GNUNET_MQ_MessageHandler *handlers)
 {
   struct GNUNET_CORE_Handle *h;
-  unsigned int hcnt;
 
   h = GNUNET_new (struct GNUNET_CORE_Handle);
   h->cfg = cfg;
@@ -794,18 +793,9 @@ GNUNET_CORE_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
   h->disconnects = disconnects;
   h->peers = GNUNET_CONTAINER_multipeermap_create (128,
 						   GNUNET_NO);
-  hcnt = 0;
-  if (NULL != handlers)
-    while (NULL != handlers[hcnt].cb)
-      hcnt++;
-  h->handlers = GNUNET_new_array (hcnt + 1,
-                                  struct GNUNET_MQ_MessageHandler);
-  if (NULL != handlers)
-    GNUNET_memcpy (h->handlers,
-		   handlers,
-		   hcnt * sizeof (struct GNUNET_MQ_MessageHandler));
-  h->hcnt = hcnt;
-  GNUNET_assert (hcnt <
+  h->handlers = GNUNET_MQ_copy_handlers (handlers);
+  h->hcnt = GNUNET_MQ_count_handlers (handlers);
+  GNUNET_assert (h->hcnt <
                  (GNUNET_SERVER_MAX_MESSAGE_SIZE -
                   sizeof (struct InitMessage)) / sizeof (uint16_t));
   LOG (GNUNET_ERROR_TYPE_DEBUG,
diff --git a/src/include/gnunet_mq_lib.h b/src/include/gnunet_mq_lib.h
index b527b58e8..a50a59c49 100644
--- a/src/include/gnunet_mq_lib.h
+++ b/src/include/gnunet_mq_lib.h
@@ -304,6 +304,30 @@ GNUNET_MQ_dll_remove (struct GNUNET_MQ_Envelope **env_head,
                       struct GNUNET_MQ_Envelope *env);
 
 
+/**
+ * Copy an array of handlers.
+ *
+ * Useful if the array has been delared in local memory and needs to be
+ * persisted for future use.
+ *
+ * @param handlers Array of handlers to be copied.
+ * @return A newly allocated array of handlers.
+ *         Needs to be freed with #GNUNET_free.
+ */
+struct GNUNET_MQ_MessageHandler *
+GNUNET_MQ_copy_handlers (const struct GNUNET_MQ_MessageHandler *handlers);
+
+
+/**
+ * Count the handlers in a handler array.
+ *
+ * @param handlers Array of handlers to be counted.
+ * @return The number of handlers in the array.
+ */
+unsigned int
+GNUNET_MQ_count_handlers (const struct GNUNET_MQ_MessageHandler *handlers);
+
+
 /**
  * Message handler for a specific message type.
  */
diff --git a/src/util/mq.c b/src/util/mq.c
index 43926ed64..fe47f6ab4 100644
--- a/src/util/mq.c
+++ b/src/util/mq.c
@@ -515,21 +515,12 @@ GNUNET_MQ_queue_for_callbacks (GNUNET_MQ_SendImpl send,
                                void *error_handler_cls)
 {
   struct GNUNET_MQ_Handle *mq;
-  unsigned int i;
 
   mq = GNUNET_new (struct GNUNET_MQ_Handle);
   mq->send_impl = send;
   mq->destroy_impl = destroy;
   mq->cancel_impl = cancel;
-  if (NULL != handlers)
-  {
-    for (i=0;NULL != handlers[i].cb; i++) ;
-    mq->handlers = GNUNET_new_array (i + 1,
-				     struct GNUNET_MQ_MessageHandler);
-    GNUNET_memcpy (mq->handlers,
-	    handlers,
-	    i * sizeof (struct GNUNET_MQ_MessageHandler));
-  }
+  mq->handlers = GNUNET_MQ_copy_handlers (handlers);
   mq->error_handler = error_handler;
   mq->error_handler_cls = error_handler_cls;
   mq->impl_state = impl_state;
@@ -1184,4 +1175,54 @@ GNUNET_MQ_dll_remove (struct GNUNET_MQ_Envelope **env_head,
 }
 
 
+/**
+ * Copy an array of handlers.
+ *
+ * Useful if the array has been delared in local memory and needs to be
+ * persisted for future use.
+ *
+ * @param handlers Array of handlers to be copied. Can be NULL (nothing done).
+ * @return A newly allocated array of handlers.
+ *         Needs to be freed with #GNUNET_free.
+ */
+struct GNUNET_MQ_MessageHandler *
+GNUNET_MQ_copy_handlers (const struct GNUNET_MQ_MessageHandler *handlers)
+{
+  struct GNUNET_MQ_MessageHandler *copy;
+  unsigned int count;
+
+  if (NULL == handlers)
+    return NULL;
+
+  count = GNUNET_MQ_count_handlers (handlers);
+  copy = GNUNET_new_array (count + 1,
+                           struct GNUNET_MQ_MessageHandler);
+  GNUNET_memcpy (copy,
+                 handlers,
+                 count * sizeof (struct GNUNET_MQ_MessageHandler));
+  return copy;
+}
+
+
+/**
+ * Count the handlers in a handler array.
+ *
+ * @param handlers Array of handlers to be counted.
+ * @return The number of handlers in the array.
+ */
+unsigned int
+GNUNET_MQ_count_handlers (const struct GNUNET_MQ_MessageHandler *handlers)
+{
+  unsigned int i;
+
+  if (NULL == handlers)
+    return 0;
+
+  for (i=0; NULL != handlers[i].cb; i++) ;
+
+  return i;
+}
+
+
+
 /* end of mq.c */