src/W1CounterDevice.cc

   1 /*
   2  * W1CounterDevice.cc
   3  *
   4  *  Created on: Oct 30, 2010
   5  *      Author: lamikr
   6  */
   7
   8 #include <iostream>
   9 #include <fstream>
  10 #include <sstream>
  11 #include <iomanip>
  12
  13 #include <vector>
  14
  15 #include <plp/log.h>
  16
  17 #include "W1CounterDevice.hh"
  18
  19 using namespace std;
  20 using namespace w1;
  21
  22 template <class NumberDataType>
  23 bool string_to_number(NumberDataType& result,
  24                  const std::string& string_param,
  25                  std::ios_base& (*format)(std::ios_base&))
  26 {
  27         std::istringstream iss(string_param);
  28         return !(iss >> format >> result).fail();
  29 }
  30
  31 W1CounterDevice::W1CounterDevice(string device_id_param,
  32                 string device_type_param,
  33                 dirent *direntry_param): W1Device(device_id_param, device_type_param, direntry_param) {
  34         string text;
  35
  36         ifstream ifs(slave_file.c_str());
  37         if (ifs.is_open() == false) {
  38                 log_error("%s: %s failed to read data from file: %s\n", id.c_str(), get_type().c_str(), slave_file.c_str());
  39                 log_error("Verify that you have w1_ds2423 kernel module loaded.\n");
  40                 ifs.close();
  41         }
  42 }
  43
  44 W1CounterDevice::~W1CounterDevice() {
  45         // TODO Auto-generated destructor stub
  46 }
  47
  48 vector<double> *W1CounterDevice::get_raw_data() {
  49         int             pos;
  50         int             b_cnt;
  51         string          val_str;
  52         int             val_int;
  53         vector<double>  *ret_val;
  54
  55         ret_val = NULL;
  56         ifstream ifs(slave_file.c_str());
  57         if (ifs.is_open() == true) {
  58                 while(getline(ifs, val_str)) {
  59                         b_cnt   = val_str.length();
  60                         if (b_cnt > 0) {
  61                                 pos     = val_str.find("crc=YES c=");
  62                                 if ((pos >= 0) &&
  63                                     ((pos + 10) < b_cnt)) {
  64                                         if (ret_val == NULL) {
  65                                                 ret_val = new vector<double>();
  66                                         }
  67                                         val_str = val_str.substr(pos + 10);
  68                                         string_to_number<int>(val_int, val_str, dec);
  69                                         ret_val->push_back(val_int);
  70                                 }
  71                         }
  72                 }
  73                 ifs.close();
  74         }
  75         return ret_val;
  76 }
  77
  78 string W1CounterDevice::get_unit() {
  79         return "";
  80 }
  81
  82 unsigned int W1CounterDevice::get_data_decimal_precision() {
  83         return 0;
  84 }