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  #include "mbed-connector-interface/DataWrapper.h"
00024 
00025  // constructor
00026  DataWrapper::DataWrapper(uint8_t *data,int data_length) {
00027      this->m_data = data;
00028      this->m_data_length = 0;
00029      this->m_data_length_max = data_length;
00030      this->m_alloced = false;
00031      this->reset();
00032  }
00033 
00034  // constructor (alloc)
00035  DataWrapper::DataWrapper(int data_length) {
00036      this->m_data = (uint8_t *)malloc(data_length+1);
00037      memset(this->m_data,0,data_length+1);
00038      this->m_data_length = 0;
00039      this->m_data_length_max = data_length;
00040      this->m_alloced = true;
00041  }
00042 
00043  // copy constructor
00044  DataWrapper::DataWrapper(const DataWrapper &data) {
00045      this->m_data = data.m_data;
00046      this->m_data_length = data.m_data_length;
00047      this->m_data_length_max = data.m_data_length_max;
00048      this->m_alloced = data.m_alloced;
00049  }
00050 
00051  // destructor
00052  DataWrapper::~DataWrapper() {
00053      if (this->m_alloced && this->m_data != NULL) free(this->m_data);
00054  }
00055 
00056  // wrap
00057  void DataWrapper::wrap(uint8_t *data,int data_length) {
00058      this->reset();
00059      if (data != NULL && data_length > 0) {
00060         int length = data_length;
00061         if (length > this->m_data_length_max) length = this->m_data_length_max;
00062         memcpy(this->m_data,data,length);
00063         this->m_data_length = length;
00064      }
00065  }
00066 
00067  // unwrap
00068  void DataWrapper::unwrap(uint8_t *data,int data_length) {
00069      this->reset();
00070      if (data != NULL && data_length > 0) {
00071         int length = data_length;
00072         if (length > this->m_data_length_max) length = this->m_data_length_max;
00073         memcpy(this->m_data,data,length);
00074         this->m_data_length = length;
00075      }
00076  }
00077 
00078  // reset
00079  void DataWrapper::reset() {
00080      if (this->m_data != NULL && this->m_data_length_max > 0)
00081         memset(this->m_data,0,this->m_data_length_max);
00082      this->m_data_length = 0;
00083  }
00084 
00085  // set the app key
00086  void DataWrapper::setAppKey(uint8_t *appkey,int appkey_length) {
00087      // do nothing in the base class
00088      ;
00089  }
00090 
00091