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#include <limits.h>
#include <stdio.h>
#include <string.h>
#include "util.h"
const char *
battery_perc(const char *bat)
{
int perc;
char path[PATH_MAX];
snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/capacity");
return (pscanf(path, "%i", &perc) == 1) ?
bprintf("%d", perc) : NULL;
}
const char *
battery_power(const char *bat)
{
int watts;
char path[PATH_MAX];
snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/power_now");
return (pscanf(path, "%i", &watts) == 1) ?
bprintf("%d", (watts + 500000) / 1000000) : NULL;
}
const char *
battery_state(const char *bat)
{
struct {
char *state;
char *symbol;
} map[] = {
{ "Charging", "+" },
{ "Discharging", "-" },
{ "Full", "=" },
{ "Unknown", "/" },
};
size_t i;
char path[PATH_MAX], state[12];
snprintf(path, sizeof(path), "%s%s%s", "/sys/class/power_supply/", bat, "/status");
if (pscanf(path, "%12s", state) != 1) {
return NULL;
}
for (i = 0; i < LEN(map); i++) {
if (!strcmp(map[i].state, state)) {
break;
}
}
return (i == LEN(map)) ? "?" : map[i].symbol;
}
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