fixed the coding style in memheap.c

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2569 bbd45198-f89e-11dd-88c7-29a3b14d5316

src/memheap.c

@@ -142,7 +142,8 @@ void *rt_memheap_alloc(struct rt_memheap *heap, rt_uint32_t size)
     if (size < RT_MEMHEAP_MINIALLOC)
         size = RT_MEMHEAP_MINIALLOC;
 
-    RT_DEBUG_LOG(RT_DEBUG_MEMHEAP, ("allocate %d on heap:%8.*s", size, RT_NAME_MAX, heap->parent.name));
+    RT_DEBUG_LOG(RT_DEBUG_MEMHEAP, ("allocate %d on heap:%8.*s",
+                                    size, RT_NAME_MAX, heap->parent.name));
 
     if (size < heap->available_size)
     {
@@ -377,7 +378,10 @@ static struct rt_memheap _heap;
 void rt_system_heap_init(void *begin_addr, void *end_addr)
 {
     /* initialize a default heap in the system */
-	rt_memheap_init(&_heap, "heap", begin_addr, (rt_uint32_t)end_addr - (rt_uint32_t)begin_addr);
+    rt_memheap_init(&_heap,
+                    "heap",
+                    begin_addr,
+                    (rt_uint32_t)end_addr - (rt_uint32_t)begin_addr);
 }
 
 void *rt_malloc(rt_size_t size)
@@ -396,16 +400,20 @@ void *rt_malloc(rt_size_t size)
 
         /* try to allocate on other memory heap */
         information = &rt_object_container[RT_Object_Class_MemHeap];
-		for (node = information->object_list.next; node != &(information->object_list); node = node->next)
+        for (node  = information->object_list.next;
+             node != &(information->object_list);
+             node  = node->next)
         {
             object = rt_list_entry(node, struct rt_object, list);
-			heap = (struct rt_memheap*) object;
+            heap   = (struct rt_memheap *)object;
 
             /* not allocate in the default system heap */
-			if (heap == &_heap) continue;
+            if (heap == &_heap)
+                continue;
 
             ptr = rt_memheap_alloc(heap, size);
-			if (ptr != RT_NULL) break;
+            if (ptr != RT_NULL)
+                break;
         }
     }
 
@@ -440,13 +448,15 @@ void *rt_realloc(void *rmem, rt_size_t newsize)
     if (newsize == 0)
     {
         rt_free(rmem);
+
         return RT_NULL;
     }
     
     /* get old memory item */
     header_ptr = (struct rt_memheap_item *)((rt_uint8_t *)rmem - RT_MEMHEAP_SIZE);
     size = MEMITEM_SIZE(header_ptr);
-	if (newsize > size || newsize < size - RT_MEMHEAP_SIZE) /* re-allocate memory */
+     /* re-allocate memory */
+    if (newsize > size || newsize < size - RT_MEMHEAP_SIZE)
     {
         /* re-allocate a memory block */
         nmem = (void*)rt_malloc(newsize);