GattAttribute.h

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2013 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 #ifndef __GATT_ATTRIBUTE_H__
00018 #define __GATT_ATTRIBUTE_H__
00019 
00020 #include "UUID.h"
00021 
00022 class GattAttribute {
00023 public:
00024     typedef uint16_t Handle_t;
00025     static const Handle_t INVALID_HANDLE = 0x0000;
00026 
00027 public:
00028     /**
00029      *  @brief  Creates a new GattAttribute using the specified
00030      *          UUID, value length, and inital value
00031      *
00032      *  @param[in]  uuid
00033      *              The UUID to use for this attribute
00034      *  @param[in]  valuePtr
00035      *              The memory holding the initial value.
00036      *  @param[in]  initialLen
00037      *              The min length in bytes of this attribute's value
00038      *  @param[in]  maxLen
00039      *              The max length in bytes of this attribute's value
00040      *
00041      *  @section EXAMPLE
00042      *
00043      *  @code
00044      *
00045      *  // UUID = 0x2A19, Min length 2, Max len = 2
00046      *  GattAttribute attr = GattAttribute(0x2A19, &someValue, 2, 2);
00047      *
00048      *  @endcode
00049      */
00050     GattAttribute(const UUID &uuid, uint8_t *valuePtr = NULL, uint16_t initialLen = 0, uint16_t maxLen = 0) :
00051         _uuid(uuid), _valuePtr(valuePtr), _initialLen(initialLen), _lenMax(maxLen), _len(initialLen), _handle() {
00052         /* empty */
00053     }
00054 
00055 public:
00056     Handle_t    getHandle(void)        const {return _handle;    }
00057     const UUID &getUUID(void)          const {return _uuid;      }
00058     uint16_t    getLength(void)        const {return _len;       }
00059     uint16_t    getInitialLength(void) const {return _initialLen;}
00060     uint16_t    getMaxLength(void)     const {return _lenMax;    }
00061     uint16_t   *getLengthPtr(void)           {return &_len;      }
00062     void        setHandle(Handle_t id)       {_handle = id;      }
00063     uint8_t    *getValuePtr(void)            {return _valuePtr;  }
00064 
00065 private:
00066     UUID      _uuid;        /* Characteristic UUID */
00067     uint8_t  *_valuePtr;
00068     uint16_t  _initialLen;  /* Initial length of the value */
00069     uint16_t  _lenMax;      /* Maximum length of the value */
00070     uint16_t  _len;         /* Current length of the value */
00071     Handle_t  _handle;
00072 
00073 private:
00074     /* disallow copy and assignment */
00075     GattAttribute(const GattAttribute &);
00076     GattAttribute& operator=(const GattAttribute &);
00077 };
00078 
00079 #endif // ifndef __GATT_ATTRIBUTE_H__