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#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "i3status.h"
/*
* Get battery information from /sys. Note that it uses the design capacity to
* calculate the percentage, not the last full capacity, so you can see how
* worn off your battery is.
*
*/
const char *get_battery_info(struct battery *bat) {
char buf[1024];
static char part[512];
char *walk, *last;
int full_design = -1,
remaining = -1,
present_rate = -1;
charging_status_t status = CS_DISCHARGING;
slurp(bat->path, buf, sizeof(buf));
for (walk = buf, last = buf; (walk-buf) < 1024; walk++) {
if (*walk == '\n') {
last = walk+1;
continue;
}
if (*walk != '=')
continue;
if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW") ||
BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW"))
remaining = atoi(walk+1);
else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
present_rate = atoi(walk+1);
else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
status = CS_CHARGING;
else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
status = CS_FULL;
else {
/* The only thing left is the full capacity */
if (bat->use_last_full) {
if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
continue;
} else {
if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
continue;
}
full_design = atoi(walk+1);
}
}
if ((full_design == 1) || (remaining == -1))
return part;
if (present_rate > 0) {
float remaining_time;
int seconds, hours, minutes;
if (status == CS_CHARGING)
remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
else if (status == CS_DISCHARGING)
remaining_time = ((float)remaining / (float)present_rate);
else remaining_time = 0;
seconds = (int)(remaining_time * 3600.0);
hours = seconds / 3600;
seconds -= (hours * 3600);
minutes = seconds / 60;
seconds -= (minutes * 60);
(void)snprintf(part, sizeof(part), "%s %.02f%% %02d:%02d:%02d",
(status == CS_CHARGING ? "CHR" :
(status == CS_DISCHARGING ? "BAT" : "FULL")),
(((float)remaining / (float)full_design) * 100),
max(hours, 0), max(minutes, 0), max(seconds, 0));
} else {
(void)snprintf(part, sizeof(part), "%s %.02f%%",
(status == CS_CHARGING ? "CHR" :
(status == CS_DISCHARGING ? "BAT" : "FULL")),
(((float)remaining / (float)full_design) * 100));
}
return part;
}
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