Continuing in my effort to create blog posts of old bits of code I can find lying around on my computer and internal git server, I decided to post this small C++ project. It logs the percentage of battery left at specific intervals into a SQLite3 database. Again, this is one of my first C++ projects so I'm not exactly confident it's done to a high standard. :)
Nonetheless, the code is included below and a the git repository on bitbucket can be found here: https://bitbucket.org/ryanmcconville/windows-battery-stats/
#include "stdafx.h"
#include "iostream"
#include "sstream"
#include "time.h"
#include "vector"
#include "iostream"
#include "Windows.h"
#include "fstream"
#include "Shlobj.h"
#include "stdio.h"
#include "WbemCli.h"
#include "sqlite3.h"
using namespace std;
//get the users home directory
wstring GetHomeDirectory(){
PWSTR path;
SHGetKnownFolderPath(FOLDERID_Profile, 0, NULL, &path);
return path;
}
void WriteDefaultConfiguration(char *defaulttime){
ofstream config_file;
config_file.open("config.ini", ios::out);
config_file.write(defaulttime, strlen(defaulttime));
config_file.close();
}
int ConvertToMilliseconds(int interval){
return ((interval * 60) * 1000);
}
int ReadConfigurationFile(){
char defaulttime[7] = "10";
char line[7];
ifstream config_file;
config_file.open("config.ini",ios::in);
if(!config_file.is_open()){
WriteDefaultConfiguration(defaulttime);
config_file.open("config.ini",ios::in);
if(!config_file.is_open()){
return ConvertToMilliseconds(atoi(defaulttime));
}
}
config_file.get(line, 10);
int interval;
interval = atoi(line);
int interval_milli = ConvertToMilliseconds(interval);
return interval_milli;
}
sqlite3* CreateDatabase(){
sqlite3 *db;
char *err = 0;
int rc = sqlite3_open("battery_stats.sqlite", &db);
if(rc){
fprintf(stderr, "cant open database %s\n", sqlite3_errmsg(db));
}
char *sql = "CREATE TABLE IF NOT EXISTS stat(" \
"date DATETIME NOT NULL," \
"battery_percentage INT NOT NULL," \
"ac_connected INT NOT NULL);";
sqlite3_stmt *statement;
if(sqlite3_prepare_v2(db, sql, -1, &statement, 0) == SQLITE_OK){
sqlite3_step(statement);
}
sqlite3_close(db);
return db;
}
int _tmain(int argc, _TCHAR* argv[]){
//hide console window
HWND hWnd = GetConsoleWindow();
ShowWindow(hWnd, SW_HIDE);
int interval_time = ReadConfigurationFile();
sqlite3 *db = CreateDatabase();
while(true){
SYSTEM_POWER_STATUS status;
::GetSystemPowerStatus(&status);//get battery life
int per = status.BatteryLifePercent;
//get time
time_t rawtime;
struct tm* printtime;
time(&rawtime);
printtime = localtime(&rawtime);
string timenow = asctime(printtime);
//create structure to hold percentage as a string
char strPer[4];
//copy int percentage to string
itoa(per, strPer, 10);
//open textfile to write to
ofstream batteryStats;
batteryStats.open(GetHomeDirectory() +L"/battery_stats.txt", ios::app);
int AC = (int) status.ACLineStatus;
string acconnected;
if(AC){
acconnected = "AC connected";
}else{
acconnected = "AC disconnected";
}
if(!batteryStats.is_open()){
cout<< "Error";
}else{
batteryStats << "\n" << timenow <
sqlite3_stmt *statement;
char *sql = "INSERT INTO stat (date, battery_percentage, ac_connected) VALUES(?, ?, ?);";
if(sqlite3_prepare_v2(db, sql, strlen(sql), &statement, 0) == SQLITE_OK){
sqlite3_bind_text(statement, 1, asctime(printtime),strlen(asctime(printtime)), 0);
sqlite3_bind_int(statement, 2, per);
sqlite3_bind_int(statement, 3, AC);
sqlite3_step(statement);
sqlite3_finalize(statement);
} else {
fprintf(stderr, "cant update database %s\n", sqlite3_errmsg(db));
}
batteryStats.close();
//sleep for specified time
Sleep(interval_time);
}
}
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