text: /**
   ******************************************************************************
   * @file    RecordGEO.cpp
   * @author  ST / Central Labs
   * @version V2.0.0
   * @date    28 Apr 2017
   * @brief   RecordGEO implementation.
   ******************************************************************************
   * @attention
   *
   * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
   *
   * Redistribution and use in source and binary forms, with or without modification,
   * are permitted provided that the following conditions are met:
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   *      this list of conditions and the following disclaimer.
   *   2. Redistributions in binary form must reproduce the above copyright notice,
   *      this list of conditions and the following disclaimer in the documentation
   *      and/or other materials provided with the distribution.
   *   3. Neither the name of STMicroelectronics nor the names of its contributors
   *      may be used to endorse or promote products derived from this software
   *      without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   ******************************************************************************
   */
  #include <cstdio>
  
  #include "RecordGeo.h"
  
  namespace NDefLib {
  
  const std::string RecordGeo::sGeoTag = ("geo:");
  
  //number of digits used for print the coordintate
  #define N_FLOAT_DIGIS 4
  #define N_INTEGER_DIGIS 3
  //string with the 2 coordinate format
  #define COORDINATE_WRITE_FORMAT "%3.4f,%3.4f"
  //+1 = sign, +1 = .
  #define COORDINATE_STR_SIZE (1+N_INTEGER_DIGIS+1+N_FLOAT_DIGIS)
  
  //string to use for read a couple of coordinate
  #define COORDINATE_READ_FORMAT "%f,%f"
  
  
  RecordGeo::RecordGeo(const float lat, const float lon) :
  		RecordURI(sGeoTag), mLatitiude(lat), mLongitude(lon), mContentIsChange(true) {
  };
  
  void RecordGeo::update_content(){
  	if(!mContentIsChange) {
  		return;
  	}
  
  	//2 coordinate +1 for the separator +1 for the \0
  	char buffer[2*COORDINATE_STR_SIZE+1+1];
  	std::sprintf(buffer,COORDINATE_WRITE_FORMAT,mLatitiude,mLongitude);
  	mContent.clear();
  	mContent.append(buffer);
  
  	mContentIsChange=false;
  }
  
  RecordGeo* RecordGeo::parse(const RecordHeader &header, const uint8_t * const buffer) {
  	uint16_t offset = 0;
  	if (buffer[offset++] != RecordURI::sNDEFUriIdCode) {
  		return NULL;
  	}
  	if (buffer[offset++] != RecordURI::UNKNOWN) {
  		return NULL;
  	}
  	if (sGeoTag.compare(0, sGeoTag.size(), (const char*) buffer + offset, sGeoTag.size()) != 0) {
  		return NULL;
  	}
  	offset += sGeoTag.size();
  
  	const std::string uriContent((const char*) (buffer + offset), header.get_payload_length() - offset);
  
  	float lat, lon;
  	//build the record only if both the coordinate are available
  	if (std::sscanf(uriContent.c_str(),COORDINATE_READ_FORMAT,&lat,&lon)!=2) {
  		return NULL;
  	}
  
  	return new RecordGeo(lat,lon);
  }
  
  } /* namespace NDefLib */
  
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ 
  