void battery_update(battery *b)
{
gchar *gctmp;
/* read from sysfs */
b->charge_now = get_gint_from_infofile(b, "charge_now");
b->energy_now = get_gint_from_infofile(b, "energy_now");
b->current_now = get_gint_from_infofile(b, "current_now");
b->power_now = get_gint_from_infofile(b, "power_now");
/* FIXME: Some battery drivers report -1000 when the discharge rate is
* unavailable. Others use negative values when discharging. Best we can do
* is to treat -1 as an error, and take the absolute value otherwise.
* Ideally the kernel would not export the sysfs file when the value is not
* available. */
if (b->current_now < -1)
b->current_now = - b->current_now;
if (b->power_now < -1)
b->power_now = - b->power_now;
b->charge_full = get_gint_from_infofile(b, "charge_full");
b->energy_full = get_gint_from_infofile(b, "energy_full");
b->charge_full_design = get_gint_from_infofile(b, "charge_full_design");
b->energy_full_design = get_gint_from_infofile(b, "energy_full_design");
b->voltage_now = get_gint_from_infofile(b, "voltage_now");
gctmp = get_gchar_from_infofile(b, "type");
b->type_battery = gctmp ? (strcasecmp(gctmp, "battery") == 0) : TRUE;
b->state = get_gchar_from_infofile(b, "status");
if (!b->state)
b->state = get_gchar_from_infofile(b, "state");
if (!b->state) {
if (b->charge_now != -1 || b->energy_now != -1
|| b->charge_full != -1 || b->energy_full != -1)
b->state = "available";
else
b->state = "unavailable";
}
/* convert energy values (in mWh) to charge values (in mAh) if needed and possible */
if (b->energy_full != -1 && b->charge_full == -1) {
if (b->voltage_now != -1) {
b->charge_full = b->energy_full * 1000 / b->voltage_now;
} else {
b->charge_full = b->energy_full;
b->capacity_unit = "mWh";
}
}
if (b->energy_full_design != -1 && b->charge_full_design == -1) {
if (b->voltage_now != -1) {
b->charge_full_design = b->energy_full_design * 1000 / b->voltage_now;
} else {
b->charge_full_design = b->energy_full_design;
b->capacity_unit = "mWh";
}
}
if (b->energy_now != -1 && b->charge_now == -1) {
if (b->voltage_now != -1) {
b->charge_now = b->energy_now * 1000 / b->voltage_now;
if (b->current_now != -1)
b->current_now = b->current_now * 1000 / b->voltage_now;
} else {
b->charge_now = b->energy_now;
}
}
if (b->power_now != -1 && b->current_now == -1) {
if (b->voltage_now != -1 && b->voltage_now != 0)
b->current_now = b->power_now * 1000 / b->voltage_now;
}
if (b->charge_full < MIN_CAPACITY)
b->percentage = 0;
else {
int promille = (b->charge_now * 1000) / b->charge_full;
b->percentage = (promille + 5) / 10; /* round properly */
}
if (b->percentage > 100)
b->percentage = 100;
if (b->current_now == -1) {
b->poststr = "rate information unavailable";
b->seconds = -1;
} else if (!strcasecmp(b->state, "charging")) {
if (b->current_now > MIN_PRESENT_RATE) {
b->seconds = 3600 * (b->charge_full - b->charge_now) / b->current_now;
b->poststr = " until charged";
} else {
b->poststr = "charging at zero rate - will never fully charge.";
b->seconds = -1;
}
} else if (!strcasecmp(b->state, "discharging")) {
if (b->current_now > MIN_PRESENT_RATE) {
b->seconds = 3600 * b->charge_now / b->current_now;
b->poststr = " remaining";
} else {
b->poststr = "discharging at zero rate - will never fully discharge.";
b->seconds = -1;
}
} else {
b->poststr = NULL;
b->seconds = -1;
}
}
battery* battery_update(battery *b)
{
gchar *gctmp;
int promille;
if (b == NULL)
return NULL;
if (!battery_inserted(b->path))
return NULL;
/* read from sysfs */
b->charge_now = get_gint_from_infofile(b, "charge_now");
b->energy_now = get_gint_from_infofile(b, "energy_now");
b->current_now = get_gint_from_infofile(b, "current_now");
b->power_now = get_gint_from_infofile(b, "power_now");
/* FIXME: Some battery drivers report -1000 when the discharge rate is
* unavailable. Others use negative values when discharging. Best we can do
* is to treat -1 as an error, and take the absolute value otherwise.
* Ideally the kernel would not export the sysfs file when the value is not
* available. */
if (b->current_now < -1)
b->current_now = - b->current_now;
b->charge_full = get_gint_from_infofile(b, "charge_full");
b->energy_full = get_gint_from_infofile(b, "energy_full");
b->charge_full_design = get_gint_from_infofile(b, "charge_full_design");
b->energy_full_design = get_gint_from_infofile(b, "energy_full_design");
b->voltage_now = get_gint_from_infofile(b, "voltage_now");
gctmp = get_gchar_from_infofile(b, "type");
b->type_battery = gctmp ? (strcasecmp(gctmp, "battery") == 0) : TRUE;
g_free(gctmp);
g_free(b->state);
b->state = get_gchar_from_infofile(b, "status");
if (!b->state)
b->state = get_gchar_from_infofile(b, "state");
if (!b->state) {
if (b->charge_now != -1 || b->energy_now != -1
|| b->charge_full != -1 || b->energy_full != -1)
b->state = g_strdup("available");
else
b->state = g_strdup("unavailable");
}
#if 0 /* those conversions might be good for text prints but are pretty wrong for tooltip and calculations */
/* convert energy values (in mWh) to charge values (in mAh) if needed and possible */
if (b->energy_full != -1 && b->charge_full == -1) {
if (b->voltage_now != -1 && b->voltage_now != 0) {
b->charge_full = b->energy_full * 1000 / b->voltage_now;
} else {
b->charge_full = b->energy_full;
b->capacity_unit = "mWh";
}
}
if (b->energy_full_design != -1 && b->charge_full_design == -1) {
if (b->voltage_now != -1 && b->voltage_now != 0) {
b->charge_full_design = b->energy_full_design * 1000 / b->voltage_now;
} else {
b->charge_full_design = b->energy_full_design;
b->capacity_unit = "mWh";
}
}
if (b->energy_now != -1 && b->charge_now == -1) {
if (b->voltage_now != -1 && b->voltage_now != 0) {
b->charge_now = b->energy_now * 1000 / b->voltage_now;
if (b->current_now != -1)
b->current_now = b->current_now * 1000 / b->voltage_now;
} else {
b->charge_now = b->energy_now;
}
}
if (b->power_now < -1)
b->power_now = - b->power_now;
else if (b->power_now == -1 && b->voltage_now != -1 && b->current_now != -1)
b->power_now = b->voltage_now * b->current_now / 1000; // P = U*I
if (b->power_now != -1 && b->current_now == -1) {
if (b->voltage_now != -1 && b->voltage_now != 0)
b->current_now = b->power_now * 1000 / b->voltage_now;
}
#endif
if (b->charge_now != -1 && b->charge_full != -1)
promille = (b->charge_now * 1000) / b->charge_full;
else if (b->energy_full != -1 && b->energy_now != -1)
/* no charge data, let try energy instead */
promille = (b->energy_now * 1000) / b->energy_full;
else
promille = 0;
b->percentage = (promille + 5) / 10; /* round properly */
if (b->percentage > 100)
b->percentage = 100;
if (b->power_now < -1)
b->power_now = - b->power_now;
if (b->current_now == -1 && b->power_now == -1) {
//b->poststr = "rate information unavailable";
b->seconds = -1;
} else if (!strcasecmp(b->state, "charging")) {
if (b->current_now > MIN_PRESENT_RATE) {
b->seconds = 3600 * (b->charge_full - b->charge_now) / b->current_now;
//b->poststr = " until charged";
} else if (b->power_now > 0) {
b->seconds = 3600 * (b->energy_full - b->energy_now) / b->power_now;
} else {
//b->poststr = "charging at zero rate - will never fully charge.";
b->seconds = -1;
}
} else if (!strcasecmp(b->state, "discharging")) {
if (b->current_now > MIN_PRESENT_RATE) {
b->seconds = 3600 * b->charge_now / b->current_now;
//b->poststr = " remaining";
} else if (b->power_now > 0) {
b->seconds = 3600 * b->energy_now / b->power_now;
} else {
//b->poststr = "discharging at zero rate - will never fully discharge.";
b->seconds = -1;
}
} else {
//b->poststr = NULL;
b->seconds = -1;
}
return b;
}