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