Add an Attribute class and derive GattCharacteristic from it, to prepare for descriptors

Author: carlescufi

public/GattAttribute.h

@@ -0,0 +1,89 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#ifndef __GATT_ATTRIBUTE_H__
+#define __GATT_ATTRIBUTE_H__
+
+#include "blecommon.h"
+#include "UUID.h"
+
+/**************************************************************************/
+/*!
+    \brief  GATT attribute
+*/
+/**************************************************************************/
+class GattAttribute
+{
+public:
+
+    /**
+     *  @brief  Creates a new GattAttribute using the specified
+     *          UUID, value length, and inital value
+     *
+     *  @param[in]  uuid
+     *              The UUID to use for this attribute
+     *  @param[in]  valuePtr
+     *              The memory holding the initial value.
+     *  @param[in]  initialLen
+     *              The min length in bytes of this characteristic's value
+     *  @param[in]  maxLen
+     *              The max length in bytes of this characteristic's value
+     *
+     *  @section EXAMPLE
+     *
+     *  @code
+     *
+     *  // UUID = 0x2A19, Min length 2, Max len = 2, Properties = write
+     *  GattCharacteristic c = GattCharacteristic( 0x2A19, 2, 2, BLE_GATT_CHAR_PROPERTIES_WRITE );
+     *
+     *  @endcode
+     */
+    /**************************************************************************/
+    GattAttribute(const UUID &uuid, uint8_t *valuePtr = NULL, uint16_t initialLen = 0, uint16_t maxLen = 0) :
+        _uuid(uuid), _valuePtr(valuePtr), _initialLen(initialLen), _lenMax(maxLen), _handle(){
+        /* empty */
+    }
+
+public:
+    uint16_t getHandle(void) const {
+        return _handle;
+    }
+    void setHandle(uint16_t id) {
+        _handle = id;
+    }
+    const UUID &getUUID(void) const {
+        return _uuid;
+    }
+    uint16_t getInitialLength(void) const {
+        return _initialLen;
+    }
+    uint16_t getMaxLength(void) const {
+        return _lenMax;
+    }
+    uint8_t *getValuePtr(void) {
+        return _valuePtr;
+    }
+
+protected:
+    UUID      _uuid;        /* Characteristic UUID */
+    uint8_t  *_valuePtr;
+    uint16_t  _initialLen;  /* Initial length of the value */
+    uint16_t  _lenMax;      /* Maximum length of the value */
+    uint16_t  _handle;
+};
+
+#endif // ifndef __GATT_ATTRIBUTE_H__

public/GattCharacteristic.h

@@ -20,13 +20,14 @@
 
 #include "blecommon.h"
 #include "UUID.h"
+#include "GattAttribute.h"
 
 /**************************************************************************/
 /*!
     \brief  GATT characteristic
 */
 /**************************************************************************/
-class GattCharacteristic
+class GattCharacteristic : public GattAttribute
 {
 public:
     enum {
@@ -325,39 +326,17 @@ class GattCharacteristic
     /**************************************************************************/
     GattCharacteristic(const UUID &uuid, uint8_t *valuePtr = NULL, uint16_t initialLen = 0, uint16_t maxLen = 0,
                        uint8_t props = BLE_GATT_CHAR_PROPERTIES_NONE) :
-        _uuid(uuid), _valuePtr(valuePtr), _initialLen(initialLen), _lenMax(maxLen), _handle(), _properties(props) {
+        GattAttribute(uuid, valuePtr, initialLen, maxLen), _properties(props) {
         /* empty */
     }
 
 public:
-    uint16_t getHandle(void) const {
-        return _handle;
-    }
-    void setHandle(uint16_t id) {
-        _handle = id;
-    }
-    const UUID &getUUID(void) const {
-        return _uuid;
-    }
     uint8_t getProperties(void) const {
         return _properties;
     }
-    uint16_t getInitialLength(void) const {
-        return _initialLen;
-    }
-    uint16_t getMaxLength(void) const {
-        return _lenMax;
-    }
-    uint8_t *getValuePtr(void) {
-        return _valuePtr;
-    }
+
 
 private:
-    UUID      _uuid;        /* Characteristic UUID */
-    uint8_t  *_valuePtr;
-    uint16_t  _initialLen;  /* Initial length of the value */
-    uint16_t  _lenMax;      /* Maximum length of the value */
-    uint16_t  _handle;
     uint8_t   _properties;
 };