src/W1Scanner.cc

   1 /*
   2  * W1Scanner.cc
   3  *
   4  *  Created on: Oct 20, 2010
   5  *      Author: lamikr
   6  */
   7
   8 #include <string.h>
   9 #include <malloc.h>
  10
  11 #include <string>
  12 #include <sstream>
  13 #include <iostream>
  14
  15 #include <plp/log.h>
  16 #include "W1Scanner.hh"
  17 #include "W1TemperatureSensor.hh"
  18 #include "W1CounterDevice.hh"
  19
  20 using namespace w1;
  21 using namespace std;
  22
  23 W1Scanner::W1Scanner() {
  24         log_debug("created\n");
  25 }
  26
  27 W1Scanner::~W1Scanner() {
  28         log_debug("destroyed\n");
  29 }
  30
  31 bool W1Scanner::is_subdirectory(dirent *direntry) {
  32         bool ret_val    = true;
  33         if (strcmp(direntry->d_name, ".") == 0 ||
  34                 (strcmp(direntry->d_name, "..") == 0)) {
  35                         ret_val = false;
  36         }
  37         return ret_val;
  38 }
  39
  40 template <class T>
  41 bool string_to_number(T& result,
  42                  const std::string& string_param,
  43                  std::ios_base& (*format)(std::ios_base&))
  44 {
  45         std::istringstream iss(string_param);
  46         return !(iss >> format >> result).fail();
  47 }
  48
  49 W1Device *W1Scanner::create_device(dirent *direntry) {
  50         string          folder_name;
  51         string          temp_str;
  52         string          device_name;
  53         int             pos;
  54         int                     family_code;
  55         bool            sucFlg;
  56         W1Device        *ret_val;
  57
  58         ret_val         = NULL;
  59         folder_name     = direntry->d_name;
  60         pos                     = folder_name.find("-");
  61         if (pos > 0) {
  62                 temp_str        = folder_name.substr(0, pos);
  63                 // number in string is in hex format, convert to int
  64                 sucFlg          = string_to_number<int>(family_code, temp_str, hex);
  65                 if (sucFlg == true) {
  66                         cout << "family_code: " << family_code << endl;
  67                         device_name     = folder_name.substr(pos + 1, folder_name.length() - pos);
  68                         switch(family_code) {
  69                                 case    0x10:
  70                                 case    0x28:
  71                                         cout << "temperature sensor: " << family_code << endl;
  72                                         ret_val = new W1TemperatureSensor(direntry, family_code, device_name);
  73                                         break;
  74                                 case    0x1d:
  75                                         cout << "counter device: " << family_code << endl;
  76                                         ret_val = new W1CounterDevice(direntry, family_code, device_name);
  77                                         break;
  78                         }
  79                 }
  80         }
  81         return ret_val;
  82 }
  83
  84 list<W1Device *> W1Scanner::get_device_list() {
  85         DIR                     *dir;
  86         int                     err_flg;
  87         struct dirent           *direntry;
  88         W1Device                *device;
  89         list<W1Device *>        ret_val;
  90
  91         dir     = opendir(W1_SCAN_ROOTDIR);
  92         if (dir != NULL) {
  93                 direntry        = readdir(dir);
  94                 while(direntry != NULL) {
  95                         if (is_subdirectory(direntry) == true) {
  96                                 log_debug("dir_name: %s\n", direntry->d_name);
  97                                 device  = create_device(direntry);
  98                                 if (device != NULL) {
  99                                         ret_val.push_back(device);
 100                                 }
 101                         }
 102                         direntry        = readdir(dir);
 103                 }
 104                 err_flg = closedir(dir);
 105                 if (err_flg < 0) {
 106                         log_error("failed to close 1-wire device directory scanned: %s\n", W1_SCAN_ROOTDIR);
 107                 }
 108         }
 109         return ret_val;
 110 }