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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <stdint.h>
#include <math.h>
#define N_ICONS 5
char* icons[] = {
"",
"",
"",
"",
"",
"",
"",
"",
"",
"",
"",
"",
};
typedef long long llong_t;
llong_t get_number(const char* file)
{
int fd;
char buf[128];
fd = open(file, O_RDONLY);
if (fd < 0) {
return -1;
}
size_t count = read(fd, buf, sizeof(buf));
close(fd);
if (count < 0 || count > sizeof(buf) - 1) {
return -1;
}
buf[count] = 0;
return atoll(buf);
}
float absf(float f)
{
return f < 0 ? -f : f;
}
uint32_t hsv_to_rgb(int h, int s, int v){
if(h > 360 || h < 0 || s > 100 || s < 0 || v > 100 || v < 0){
return -1;
}
float sf = s / 100.0;
float vf = v / 100.0;
float hf = (float) h;
float c = sf * vf;
float x = c * (1 - absf(fmod(hf / 60.0, 2) - 1));
float m = vf - c;
float r,g,b;
if(h >= 0 && h < 60){
r = c;
g = x;
b = 0;
}
else if(h >= 60 && h < 120){
r = x;
g = c;
b = 0;
}
else if(h >= 120 && h < 180){
r = 0;
g = c;
b = x;
}
else if(h >= 180 && h < 240){
r = 0;
g = x;
b = c;
}
else if(h >= 240 && h < 300){
r = x;
g = 0;
b = c;
}
else{
r = c;
g = 0;
b = x;
}
int ri = (int) ((r + m) * 255);
int gi = (int) ((g + m) * 255);
int bi = (int) ((b + m) * 255);
return (ri << 16) | (gi << 8) | bi;
}
llong_t get_capacity()
{
return get_number("/sys/class/power_supply/BAT0/capacity");
}
llong_t get_energy_full()
{
return get_number("/sys/class/power_supply/BAT0/energy_full");
}
llong_t get_energy_now()
{
return get_number("/sys/class/power_supply/BAT0/energy_now");
}
llong_t get_ac_online()
{
return get_number("/sys/class/power_supply/AC/online");
}
llong_t get_power()
{
return get_number("/sys/class/power_supply/BAT0/power_now");
}
int get_status(char* buf, size_t size)
{
int fd;
fd = open("/sys/class/power_supply/BAT0/status", O_RDONLY);
if (fd < 0) {
return 1;
}
size_t count = read(fd, buf, size);
close(fd);
if (count < 0 || count > size - 1) {
return 1;
}
buf[count] = 0;
--count;
while (count > 0 && buf[count] == '\n') {
buf[count --] = 0;
}
return 0;
}
uint32_t percentage_to_color(int percentage)
{
int h = 135 * percentage / 100;
int s = 81;
int v = 76;
return hsv_to_rgb(h, s, v);
}
void get_time_left(
char* buf,
size_t sz,
llong_t energy,
llong_t power)
{
if (power == 0) {
buf[0] = 0;
return;
}
llong_t minutes_left = energy * 60 / power;
llong_t hours = minutes_left / 60;
llong_t minutes = minutes_left % 60;
snprintf(buf, sz - 1, "%lluh%2llum", hours, minutes);
buf[sz - 1] = 0;
}
int main(int argc, char** argv)
{
char* icon;
char timeleft[128];
char watts[128];
char percent[128];
llong_t capacity;
llong_t energy_now;
llong_t energy_full;
llong_t ac_online;
llong_t power;
if ((energy_now = get_energy_now()) < 0) {
fprintf(stderr, "Unable to get current energy.");
goto fail;
}
if ((capacity = get_capacity()) < 0) {
fprintf(stderr, "Unable to get capacity.");
goto fail;
}
if ((ac_online = get_ac_online()) < 0) {
fprintf(stderr, "Unable to get status.");
goto fail;
}
if ((power = get_power()) < 0) {
fprintf(stderr, "Unable toget power.");
goto fail;
}
ac_online = !! ac_online;
int percentage = (int) capacity;
if (percentage >= 98) {
icon = icons[10 + ac_online];
} else {
int quintile = percentage / 20;
icon = icons[quintile + (5 * ac_online) ];
}
if (ac_online) {
if ((energy_full = get_energy_full()) < 0) {
fprintf(stderr, "Unable to get current energy.");
goto fail;
}
get_time_left(timeleft, sizeof(timeleft), energy_full - energy_now, power);
} else {
get_time_left(timeleft, sizeof(timeleft), energy_now, power);
}
watts[0] = 0;
percent[0] = 0;
if (power) {
double dpower = power / 1000000.0;
snprintf(watts, sizeof(watts), "%2.1fW ", dpower);
}
if (percentage < 99 || ! ac_online) {
snprintf(percent, sizeof(percent), "%2d%% ", percentage);
}
uint32_t color = percentage_to_color(percentage);
printf("<fc=#%06x>%s </fc><fn=3><fc=#a0a0a0>%s%s%s</fc></fn>",
color, icon, percent, watts, timeleft);
return 0;
fail:
printf("<fc=#404040>%s</fc> ", icons[11]);
return 0;
}
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