1 files changed, 88 insertions, 0 deletions
diff --git a/src/get_battery_info.c b/src/get_battery_info.c
new file mode 100644
index 0000000..b81eb8e
--- /dev/null
+++ b/src/get_battery_info.c
@@ -0,0 +1,88 @@
+#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;
+}