DataWrapper.cpp

00001 /**
00002  * @file    DataWrapper.cpp
00003  * @brief   mbed CoAP Endpoint Resource Data Wrapper
00004  * @author  Doug Anson
00005  * @version 1.0
00006  * @see
00007  *
00008  * Copyright (c) 2014
00009  *
00010  * Licensed under the Apache License, Version 2.0 (the "License");
00011  * you may not use this file except in compliance with the License.
00012  * You may obtain a copy of the License at
00013  *
00014  *     http://www.apache.org/licenses/LICENSE-2.0
00015  *
00016  * Unless required by applicable law or agreed to in writing, software
00017  * distributed under the License is distributed on an "AS IS" BASIS,
00018  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00019  * See the License for the specific language governing permissions and
00020  * limitations under the License.
00021  */
00022 
00023  // Class Support
00024  #include "mbed-connector-interface/DataWrapper.h"
00025 
00026  // constructor
00027  DataWrapper::DataWrapper(uint8_t *data,int data_length) {
00028      this->m_data = data;
00029      this->m_data_length = 0;
00030      this->m_data_length_max = data_length;
00031      this->m_alloced = false;
00032      this->reset();
00033  }
00034 
00035  // constructor (alloc)
00036  DataWrapper::DataWrapper(int data_length) {
00037      this->m_data = (uint8_t *)malloc(data_length+1);
00038      memset(this->m_data,0,data_length+1);
00039      this->m_data_length = 0;
00040      this->m_data_length_max = data_length;
00041      this->m_alloced = true;
00042  }
00043 
00044  // copy constructor
00045  DataWrapper::DataWrapper(const DataWrapper &data) {
00046      this->m_data = data.m_data;
00047      this->m_data_length = data.m_data_length;
00048      this->m_data_length_max = data.m_data_length_max;
00049      this->m_alloced = data.m_alloced;
00050  }
00051 
00052  // destructor
00053  DataWrapper::~DataWrapper() {
00054      if (this->m_alloced && this->m_data != NULL) free(this->m_data);
00055  }
00056 
00057  // wrap
00058  void DataWrapper::wrap(uint8_t *data,int data_length) {
00059      this->reset();
00060      if (data != NULL && data_length > 0) {
00061         int length = data_length;
00062         if (length > this->m_data_length_max) length = this->m_data_length_max;
00063         memcpy(this->m_data,data,length);
00064         this->m_data_length = length;
00065      }
00066  }
00067 
00068  // unwrap
00069  void DataWrapper::unwrap(uint8_t *data,int data_length) {
00070      this->reset();
00071      if (data != NULL && data_length > 0) {
00072         int length = data_length;
00073         if (length > this->m_data_length_max) length = this->m_data_length_max;
00074         memcpy(this->m_data,data,length);
00075         this->m_data_length = length;
00076      }
00077  }
00078 
00079  // reset
00080  void DataWrapper::reset() {
00081      if (this->m_data != NULL && this->m_data_length_max > 0)
00082         memset(this->m_data,0,this->m_data_length_max);
00083      this->m_data_length = 0;
00084  }
00085 
00086  // set the app key
00087  void DataWrapper::setAppKey(uint8_t * /* appkey */,int /* appkey_length */) {
00088      // do nothing in the base class
00089      ;
00090  }
00091 
00092