From 9b9bf9532471abf373b36e9336a951ad5021fc3a Mon Sep 17 00:00:00 2001
From: Cristian Maglie <c.maglie@arduino.cc>
Date: Tue, 22 Sep 2015 00:07:06 +0200
Subject: [PATCH 1/2] HID: Renamed fields in HIDDescriptorListNode and
 HID_Descriptor

In particular HIDDescriptorListNode.cb has been renamed to
HIDDescriptorListNode.descriptor because it contains decriptor data
and not callbacks.

Moreover the HID_Descriptor.descriptor field has been renamed
to HID_Descriptor.data so the structure has now two fields length
and data.

   typedef struct __attribute__((packed)) {
     uint16_t length;
     const void* data;
   } HID_Descriptor;

   class HIDDescriptorListNode {
   public:
     HIDDescriptorListNode *next = NULL;
     const HID_Descriptor *descriptor;
     HIDDescriptorListNode(const HID_Descriptor *d) : descriptor(d) { }
   };

This imply a change in the use of the node from:

  node->cb->lenght
  node->cd->descriptor

to

  node->descriptor->length
  node->descriptor->data
---
 libraries/HID/HID.cpp | 4 ++--
 libraries/HID/HID.h   | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/libraries/HID/HID.cpp b/libraries/HID/HID.cpp
index c5954ed..c1b5fdf 100644
--- a/libraries/HID/HID.cpp
+++ b/libraries/HID/HID.cpp
@@ -61,7 +61,7 @@ int HID_GetDescriptor(int8_t t)
 		HIDDescriptorListNode* current = rootNode;
 		int total = 0;
 		while(current != NULL) {
-			total += USB_SendControl(TRANSFER_PGM,current->cb->descriptor,current->cb->length);
+			total += USB_SendControl(TRANSFER_PGM,current->descriptor->data,current->descriptor->length);
 			current = current->next;
 		}
 		return total;
@@ -82,7 +82,7 @@ void HID_::AppendDescriptor(HIDDescriptorListNode *node)
 		current->next = node;
 	}
 	modules_count++;
-	sizeof_hidReportDescriptor += (uint16_t)node->cb->length;
+	sizeof_hidReportDescriptor += (uint16_t)node->descriptor->length;
 }
 
 void HID_::SendReport(u8 id, const void* data, int len)
diff --git a/libraries/HID/HID.h b/libraries/HID/HID.h
index b9f29b4..760090a 100644
--- a/libraries/HID/HID.h
+++ b/libraries/HID/HID.h
@@ -46,14 +46,14 @@
 
 typedef struct __attribute__((packed)) {
   uint16_t length;
-  const void* descriptor;
+  const void* data;
 } HID_Descriptor;
 
 class HIDDescriptorListNode {
 public:
   HIDDescriptorListNode *next = NULL;
-  const HID_Descriptor * cb;
-  HIDDescriptorListNode(const HID_Descriptor *ncb) {cb = ncb;}
+  const HID_Descriptor *descriptor;
+  HIDDescriptorListNode(const HID_Descriptor *d) : descriptor(d) { }
 };
 
 class HID_

From 5a5cf764db88d148f3778a45ec1f9bae1899b3c3 Mon Sep 17 00:00:00 2001
From: Cristian Maglie <c.maglie@arduino.cc>
Date: Tue, 22 Sep 2015 01:40:35 +0200
Subject: [PATCH 2/2] HID: merged HID_Descriptor into HIDDescriptorListNode

This simplifies the object model and produce a small gain in code
size and performance.
---
 libraries/HID/HID.cpp |  4 ++--
 libraries/HID/HID.h   | 11 ++++-------
 2 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/libraries/HID/HID.cpp b/libraries/HID/HID.cpp
index c1b5fdf..8533f08 100644
--- a/libraries/HID/HID.cpp
+++ b/libraries/HID/HID.cpp
@@ -61,7 +61,7 @@ int HID_GetDescriptor(int8_t t)
 		HIDDescriptorListNode* current = rootNode;
 		int total = 0;
 		while(current != NULL) {
-			total += USB_SendControl(TRANSFER_PGM,current->descriptor->data,current->descriptor->length);
+			total += USB_SendControl(TRANSFER_PGM,current->data,current->length);
 			current = current->next;
 		}
 		return total;
@@ -82,7 +82,7 @@ void HID_::AppendDescriptor(HIDDescriptorListNode *node)
 		current->next = node;
 	}
 	modules_count++;
-	sizeof_hidReportDescriptor += (uint16_t)node->descriptor->length;
+	sizeof_hidReportDescriptor += (uint16_t)node->length;
 }
 
 void HID_::SendReport(u8 id, const void* data, int len)
diff --git a/libraries/HID/HID.h b/libraries/HID/HID.h
index 760090a..1a87bb7 100644
--- a/libraries/HID/HID.h
+++ b/libraries/HID/HID.h
@@ -44,16 +44,13 @@
 #define HID_REPORT_DESCRIPTOR_TYPE      0x22
 #define HID_PHYSICAL_DESCRIPTOR_TYPE    0x23
 
-typedef struct __attribute__((packed)) {
-  uint16_t length;
-  const void* data;
-} HID_Descriptor;
-
 class HIDDescriptorListNode {
 public:
   HIDDescriptorListNode *next = NULL;
-  const HID_Descriptor *descriptor;
-  HIDDescriptorListNode(const HID_Descriptor *d) : descriptor(d) { }
+  HIDDescriptorListNode(const void *d, uint16_t l) : data(d), length(l) { }
+
+  const void* data;
+  uint16_t length;
 };
 
 class HID_