git.sur5r.net Git - i3/i3status/blob - src/print_battery_info.c

   1 // vim:ts=4:sw=4:expandtab
   2 #include <ctype.h>
   3 #include <time.h>
   4 #include <string.h>
   5 #include <stdlib.h>
   6 #include <stdio.h>
   7 #include <yajl/yajl_gen.h>
   8 #include <yajl/yajl_version.h>
   9
  10 #include "i3status.h"
  11
  12 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
  13 #include <sys/types.h>
  14 #include <sys/sysctl.h>
  15 #include <dev/acpica/acpiio.h>
  16 #endif
  17
  18 #if defined(__OpenBSD__)
  19 #include <sys/types.h>
  20 #include <sys/ioctl.h>
  21 #include <sys/fcntl.h>
  22 #include <machine/apmvar.h>
  23 #endif
  24
  25 #if defined(__NetBSD__)
  26 #include <fcntl.h>
  27 #include <prop/proplib.h>
  28 #include <sys/envsys.h>
  29 #endif
  30
  31 /*
  32  * Get battery information from /sys. Note that it uses the design capacity to
  33  * calculate the percentage, not the last full capacity, so you can see how
  34  * worn off your battery is.
  35  *
  36  */
  37 void print_battery_info(yajl_gen json_gen, char *buffer, int number, const char *path, const char *format, const char *format_down, const char *status_chr, const char *status_bat, const char *status_unk, const char *status_full, int low_threshold, char *threshold_type, bool last_full_capacity, bool integer_battery_capacity, bool hide_seconds) {
  38     time_t empty_time;
  39     struct tm *empty_tm;
  40     char buf[1024];
  41     char statusbuf[16];
  42     char percentagebuf[16];
  43     char remainingbuf[256];
  44     char emptytimebuf[256];
  45     char consumptionbuf[256];
  46     const char *walk, *last;
  47     char *outwalk = buffer;
  48     bool watt_as_unit = false;
  49     bool colorful_output = false;
  50     int full_design = -1,
  51         remaining = -1,
  52         present_rate = -1,
  53         voltage = -1;
  54     charging_status_t status = CS_DISCHARGING;
  55
  56     memset(statusbuf, '\0', sizeof(statusbuf));
  57     memset(percentagebuf, '\0', sizeof(percentagebuf));
  58     memset(remainingbuf, '\0', sizeof(remainingbuf));
  59     memset(emptytimebuf, '\0', sizeof(emptytimebuf));
  60     memset(consumptionbuf, '\0', sizeof(consumptionbuf));
  61
  62     static char batpath[512];
  63     sprintf(batpath, path, number);
  64     INSTANCE(batpath);
  65
  66 #define BATT_STATUS_NAME(status) \
  67     (status == CS_CHARGING ? status_chr : (status == CS_DISCHARGING ? status_bat : (status == CS_UNKNOWN ? status_unk : status_full)))
  68
  69 #if defined(LINUX)
  70     if (!slurp(batpath, buf, sizeof(buf))) {
  71         OUTPUT_FULL_TEXT(format_down);
  72         return;
  73     }
  74
  75     for (walk = buf, last = buf; (walk - buf) < 1024; walk++) {
  76         if (*walk == '\n') {
  77             last = walk + 1;
  78             continue;
  79         }
  80
  81         if (*walk != '=')
  82             continue;
  83
  84         if (BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_NOW")) {
  85             watt_as_unit = true;
  86             remaining = atoi(walk + 1);
  87         } else if (BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_NOW")) {
  88             watt_as_unit = false;
  89             remaining = atoi(walk + 1);
  90         } else if (BEGINS_WITH(last, "POWER_SUPPLY_CURRENT_NOW"))
  91             present_rate = abs(atoi(walk + 1));
  92         else if (BEGINS_WITH(last, "POWER_SUPPLY_VOLTAGE_NOW"))
  93             voltage = abs(atoi(walk + 1));
  94         /* on some systems POWER_SUPPLY_POWER_NOW does not exist, but actually
  95          * it is the same as POWER_SUPPLY_CURRENT_NOW but with μWh as
  96          * unit instead of μAh. We will calculate it as we need it
  97          * later. */
  98         else if (BEGINS_WITH(last, "POWER_SUPPLY_POWER_NOW"))
  99             present_rate = abs(atoi(walk + 1));
 100         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Charging"))
 101             status = CS_CHARGING;
 102         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Full"))
 103             status = CS_FULL;
 104         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS=Discharging"))
 105             status = CS_DISCHARGING;
 106         else if (BEGINS_WITH(last, "POWER_SUPPLY_STATUS="))
 107             status = CS_UNKNOWN;
 108         else {
 109             /* The only thing left is the full capacity */
 110             if (last_full_capacity) {
 111                 if (!BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL") &&
 112                     !BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL"))
 113                     continue;
 114             } else {
 115                 if (!BEGINS_WITH(last, "POWER_SUPPLY_CHARGE_FULL_DESIGN") &&
 116                     !BEGINS_WITH(last, "POWER_SUPPLY_ENERGY_FULL_DESIGN"))
 117                     continue;
 118             }
 119
 120             full_design = atoi(walk + 1);
 121         }
 122     }
 123
 124     /* the difference between POWER_SUPPLY_ENERGY_NOW and
 125      * POWER_SUPPLY_CHARGE_NOW is the unit of measurement. The energy is
 126      * given in mWh, the charge in mAh. So calculate every value given in
 127      * ampere to watt */
 128     if (!watt_as_unit) {
 129         present_rate = (((float)voltage / 1000.0) * ((float)present_rate / 1000.0));
 130
 131         if (voltage != -1) {
 132             remaining = (((float)voltage / 1000.0) * ((float)remaining / 1000.0));
 133             full_design = (((float)voltage / 1000.0) * ((float)full_design / 1000.0));
 134         }
 135     }
 136
 137     if ((full_design == -1) || (remaining == -1)) {
 138         OUTPUT_FULL_TEXT(format_down);
 139         return;
 140     }
 141
 142     (void)snprintf(statusbuf, sizeof(statusbuf), "%s", BATT_STATUS_NAME(status));
 143
 144     float percentage_remaining = (((float)remaining / (float)full_design) * 100);
 145     /* Some batteries report POWER_SUPPLY_CHARGE_NOW=<full_design> when fully
 146      * charged, even though that’s plainly wrong. For people who chose to see
 147      * the percentage calculated based on the last full capacity, we clamp the
 148      * value to 100%, as that makes more sense.
 149      * See http://bugs.debian.org/785398 */
 150     if (last_full_capacity && percentage_remaining > 100) {
 151         percentage_remaining = 100;
 152     }
 153     if (integer_battery_capacity) {
 154         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%.00f%s", percentage_remaining, pct_mark);
 155     } else {
 156         (void)snprintf(percentagebuf, sizeof(percentagebuf), "%.02f%s", percentage_remaining, pct_mark);
 157     }
 158
 159     if (present_rate > 0 && status != CS_FULL) {
 160         float remaining_time;
 161         int seconds, hours, minutes, seconds_remaining;
 162         if (status == CS_CHARGING)
 163             remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 164         else if (status == CS_DISCHARGING)
 165             remaining_time = ((float)remaining / (float)present_rate);
 166         else
 167             remaining_time = 0;
 168
 169         seconds_remaining = (int)(remaining_time * 3600.0);
 170
 171         hours = seconds_remaining / 3600;
 172         seconds = seconds_remaining - (hours * 3600);
 173         minutes = seconds / 60;
 174         seconds -= (minutes * 60);
 175
 176         if (status == CS_DISCHARGING && low_threshold > 0) {
 177             if (strcasecmp(threshold_type, "percentage") == 0 && percentage_remaining < low_threshold) {
 178                 START_COLOR("color_bad");
 179                 colorful_output = true;
 180             } else if (strcasecmp(threshold_type, "time") == 0 && seconds_remaining < 60 * low_threshold) {
 181                 START_COLOR("color_bad");
 182                 colorful_output = true;
 183             } else {
 184                 colorful_output = false;
 185             }
 186         }
 187
 188         if (hide_seconds)
 189             (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d",
 190                            max(hours, 0), max(minutes, 0));
 191         else
 192             (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d:%02d",
 193                            max(hours, 0), max(minutes, 0), max(seconds, 0));
 194
 195         empty_time = time(NULL);
 196         empty_time += seconds_remaining;
 197         empty_tm = localtime(&empty_time);
 198
 199         if (hide_seconds)
 200             (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d",
 201                            max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0));
 202         else
 203             (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d:%02d",
 204                            max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
 205
 206         (void)snprintf(consumptionbuf, sizeof(consumptionbuf), "%1.2fW",
 207                        ((float)present_rate / 1000.0 / 1000.0));
 208     } else {
 209         /* On some systems, present_rate may not exist. Still, make sure
 210          * we colorize the output if threshold_type is set to percentage
 211          * (since we don't have any information on remaining time). */
 212         if (status == CS_DISCHARGING && low_threshold > 0) {
 213             if (strcasecmp(threshold_type, "percentage") == 0 && percentage_remaining < low_threshold) {
 214                 START_COLOR("color_bad");
 215                 colorful_output = true;
 216             }
 217         }
 218     }
 219 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
 220     int state;
 221     int sysctl_rslt;
 222     size_t sysctl_size = sizeof(sysctl_rslt);
 223
 224     if (sysctlbyname(BATT_LIFE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 225         OUTPUT_FULL_TEXT(format_down);
 226         return;
 227     }
 228
 229     present_rate = sysctl_rslt;
 230     if (sysctlbyname(BATT_TIME, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 231         OUTPUT_FULL_TEXT(format_down);
 232         return;
 233     }
 234
 235     remaining = sysctl_rslt;
 236     if (sysctlbyname(BATT_STATE, &sysctl_rslt, &sysctl_size, NULL, 0) != 0) {
 237         OUTPUT_FULL_TEXT(format_down);
 238         return;
 239     }
 240
 241     state = sysctl_rslt;
 242     if (state == 0 && present_rate == 100)
 243         status = CS_FULL;
 244     else if ((state & ACPI_BATT_STAT_CHARGING) && present_rate < 100)
 245         status = CS_CHARGING;
 246     else
 247         status = CS_DISCHARGING;
 248
 249     full_design = sysctl_rslt;
 250
 251     (void)snprintf(statusbuf, sizeof(statusbuf), "%s", BATT_STATUS_NAME(status));
 252
 253     (void)snprintf(percentagebuf, sizeof(percentagebuf), "%02d%s",
 254                    present_rate, pct_mark);
 255
 256     if (state == ACPI_BATT_STAT_DISCHARG) {
 257         int hours, minutes;
 258         minutes = remaining;
 259         hours = minutes / 60;
 260         minutes -= (hours * 60);
 261         (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d",
 262                        max(hours, 0), max(minutes, 0));
 263         if (strcasecmp(threshold_type, "percentage") == 0 && present_rate < low_threshold) {
 264             START_COLOR("color_bad");
 265             colorful_output = true;
 266         } else if (strcasecmp(threshold_type, "time") == 0 && remaining < (u_int)low_threshold) {
 267             START_COLOR("color_bad");
 268             colorful_output = true;
 269         }
 270     }
 271 #elif defined(__OpenBSD__)
 272     /*
 273          * We're using apm(4) here, which is the interface to acpi(4) on amd64/i386 and
 274          * the generic interface on macppc/sparc64/zaurus, instead of using sysctl(3) and
 275          * probing acpi(4) devices.
 276          */
 277     struct apm_power_info apm_info;
 278     int apm_fd;
 279
 280     apm_fd = open("/dev/apm", O_RDONLY);
 281     if (apm_fd < 0) {
 282         OUTPUT_FULL_TEXT("can't open /dev/apm");
 283         return;
 284     }
 285     if (ioctl(apm_fd, APM_IOC_GETPOWER, &apm_info) < 0)
 286         OUTPUT_FULL_TEXT("can't read power info");
 287
 288     close(apm_fd);
 289
 290     /* Don't bother to go further if there's no battery present. */
 291     if ((apm_info.battery_state == APM_BATTERY_ABSENT) ||
 292         (apm_info.battery_state == APM_BATT_UNKNOWN)) {
 293         OUTPUT_FULL_TEXT(format_down);
 294         return;
 295     }
 296
 297     switch (apm_info.ac_state) {
 298         case APM_AC_OFF:
 299             status = CS_DISCHARGING;
 300             break;
 301         case APM_AC_ON:
 302             status = CS_CHARGING;
 303             break;
 304         default:
 305             /* If we don't know what's going on, just assume we're discharging. */
 306             status = CS_DISCHARGING;
 307             break;
 308     }
 309
 310     (void)snprintf(statusbuf, sizeof(statusbuf), "%s", BATT_STATUS_NAME(status));
 311     /* integer_battery_capacity is implied as battery_life is already in whole numbers. */
 312     (void)snprintf(percentagebuf, sizeof(percentagebuf), "%.00d%s", apm_info.battery_life, pct_mark);
 313
 314     if (status == CS_DISCHARGING && low_threshold > 0) {
 315         if (strcasecmp(threshold_type, "percentage") == 0 && apm_info.battery_life < low_threshold) {
 316             START_COLOR("color_bad");
 317             colorful_output = true;
 318         } else if (strcasecmp(threshold_type, "time") == 0 && apm_info.minutes_left < (u_int)low_threshold) {
 319             START_COLOR("color_bad");
 320             colorful_output = true;
 321         }
 322     }
 323
 324     /* Can't give a meaningful value for remaining minutes if we're charging. */
 325     if (status != CS_CHARGING) {
 326         (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d", apm_info.minutes_left / 60, apm_info.minutes_left % 60);
 327     } else {
 328         (void)snprintf(remainingbuf, sizeof(remainingbuf), "%s", "(CHR)");
 329     }
 330
 331     if (colorful_output)
 332         END_COLOR;
 333 #elif defined(__NetBSD__)
 334     /*
 335      * Using envsys(4) via sysmon(4).
 336      */
 337     int fd, rval, last_full_cap;
 338     bool is_found = false;
 339     char *sensor_desc;
 340     bool is_full = false;
 341
 342     prop_dictionary_t dict;
 343     prop_array_t array;
 344     prop_object_iterator_t iter;
 345     prop_object_iterator_t iter2;
 346     prop_object_t obj, obj2, obj3, obj4, obj5;
 347
 348     asprintf(&sensor_desc, "acpibat%d", number);
 349
 350     fd = open("/dev/sysmon", O_RDONLY);
 351     if (fd < 0) {
 352         OUTPUT_FULL_TEXT("can't open /dev/sysmon");
 353         return;
 354     }
 355
 356     rval = prop_dictionary_recv_ioctl(fd, ENVSYS_GETDICTIONARY, &dict);
 357     if (rval == -1) {
 358         close(fd);
 359         return;
 360     }
 361
 362     if (prop_dictionary_count(dict) == 0) {
 363         prop_object_release(dict);
 364         close(fd);
 365         return;
 366     }
 367
 368     iter = prop_dictionary_iterator(dict);
 369     if (iter == NULL) {
 370         prop_object_release(dict);
 371         close(fd);
 372     }
 373
 374     /* iterate over the dictionary returned by the kernel */
 375     while ((obj = prop_object_iterator_next(iter)) != NULL) {
 376         /* skip this dict if it's not what we're looking for */
 377         if ((strlen(prop_dictionary_keysym_cstring_nocopy(obj)) == strlen(sensor_desc)) &&
 378             (strncmp(sensor_desc,
 379                      prop_dictionary_keysym_cstring_nocopy(obj),
 380                      strlen(sensor_desc)) != 0))
 381             continue;
 382
 383         is_found = true;
 384
 385         array = prop_dictionary_get_keysym(dict, obj);
 386         if (prop_object_type(array) != PROP_TYPE_ARRAY) {
 387             prop_object_iterator_release(iter);
 388             prop_object_release(dict);
 389             close(fd);
 390             return;
 391         }
 392
 393         iter2 = prop_array_iterator(array);
 394         if (!iter2) {
 395             prop_object_iterator_release(iter);
 396             prop_object_release(dict);
 397             close(fd);
 398             return;
 399         }
 400
 401         /* iterate over array of dicts specific to target battery */
 402         while ((obj2 = prop_object_iterator_next(iter2)) != NULL) {
 403             obj3 = prop_dictionary_get(obj2, "description");
 404
 405             if (obj3 &&
 406                 strlen(prop_string_cstring_nocopy(obj3)) == 8 &&
 407                 strncmp("charging",
 408                         prop_string_cstring_nocopy(obj3),
 409                         8) == 0) {
 410                 obj3 = prop_dictionary_get(obj2, "cur-value");
 411
 412                 if (prop_number_integer_value(obj3))
 413                     status = CS_CHARGING;
 414                 else
 415                     status = CS_DISCHARGING;
 416
 417                 continue;
 418             }
 419
 420             if (obj3 &&
 421                 strlen(prop_string_cstring_nocopy(obj3)) == 6 &&
 422                 strncmp("charge",
 423                         prop_string_cstring_nocopy(obj3),
 424                         6) == 0) {
 425                 obj3 = prop_dictionary_get(obj2, "cur-value");
 426                 obj4 = prop_dictionary_get(obj2, "max-value");
 427                 obj5 = prop_dictionary_get(obj2, "type");
 428
 429                 remaining = prop_number_integer_value(obj3);
 430                 full_design = prop_number_integer_value(obj4);
 431
 432                 if (remaining == full_design)
 433                     is_full = true;
 434
 435                 if (strncmp("Ampere hour",
 436                             prop_string_cstring_nocopy(obj5),
 437                             11) == 0)
 438                     watt_as_unit = false;
 439                 else
 440                     watt_as_unit = true;
 441
 442                 continue;
 443             }
 444
 445             if (obj3 &&
 446                 strlen(prop_string_cstring_nocopy(obj3)) == 14 &&
 447                 strncmp("discharge rate",
 448                         prop_string_cstring_nocopy(obj3),
 449                         14) == 0) {
 450                 obj3 = prop_dictionary_get(obj2, "cur-value");
 451                 present_rate = prop_number_integer_value(obj3);
 452                 continue;
 453             }
 454
 455             if (obj3 &&
 456                 strlen(prop_string_cstring_nocopy(obj3)) == 13 &&
 457                 strncmp("last full cap",
 458                         prop_string_cstring_nocopy(obj3),
 459                         13) == 0) {
 460                 obj3 = prop_dictionary_get(obj2, "cur-value");
 461                 last_full_cap = prop_number_integer_value(obj3);
 462                 continue;
 463             }
 464
 465             if (obj3 &&
 466                 strlen(prop_string_cstring_nocopy(obj3)) == 7 &&
 467                 strncmp("voltage",
 468                         prop_string_cstring_nocopy(obj3),
 469                         7) == 0) {
 470                 obj3 = prop_dictionary_get(obj2, "cur-value");
 471                 voltage = prop_number_integer_value(obj3);
 472                 continue;
 473             }
 474         }
 475         prop_object_iterator_release(iter2);
 476     }
 477
 478     prop_object_iterator_release(iter);
 479     prop_object_release(dict);
 480     close(fd);
 481
 482     if (!is_found) {
 483         OUTPUT_FULL_TEXT(format_down);
 484         return;
 485     }
 486
 487     if (last_full_capacity)
 488         full_design = last_full_cap;
 489
 490     if (!watt_as_unit) {
 491         present_rate = (((float)voltage / 1000.0) * ((float)present_rate / 1000.0));
 492         remaining = (((float)voltage / 1000.0) * ((float)remaining / 1000.0));
 493         full_design = (((float)voltage / 1000.0) * ((float)full_design / 1000.0));
 494     }
 495
 496     float percentage_remaining =
 497         (((float)remaining / (float)full_design) * 100);
 498
 499     if (integer_battery_capacity)
 500         (void)snprintf(percentagebuf,
 501                        sizeof(percentagebuf),
 502                        "%d%s",
 503                        (int)percentage_remaining, pct_mark);
 504     else
 505         (void)snprintf(percentagebuf,
 506                        sizeof(percentagebuf),
 507                        "%.02f%s",
 508                        percentage_remaining, pct_mark);
 509
 510     /*
 511      * Handle percentage low_threshold here, and time low_threshold when
 512      * we have it.
 513      */
 514     if (status == CS_DISCHARGING && low_threshold > 0) {
 515         if (strcasecmp(threshold_type, "percentage") == 0 && (((float)remaining / (float)full_design) * 100) < low_threshold) {
 516             START_COLOR("color_bad");
 517             colorful_output = true;
 518         }
 519     }
 520
 521     if (is_full)
 522         (void)snprintf(statusbuf, sizeof(statusbuf), "%s", BATT_STATUS_NAME(CS_FULL));
 523     else
 524         (void)snprintf(statusbuf, sizeof(statusbuf), "%s", BATT_STATUS_NAME(status));
 525
 526     /*
 527      * The envsys(4) ACPI routines do not appear to provide a 'time
 528      * remaining' figure, so we must deduce it.
 529      */
 530     float remaining_time;
 531     int seconds, hours, minutes, seconds_remaining;
 532
 533     if (status == CS_CHARGING)
 534         remaining_time = ((float)full_design - (float)remaining) / (float)present_rate;
 535     else if (status == CS_DISCHARGING)
 536         remaining_time = ((float)remaining / (float)present_rate);
 537     else
 538         remaining_time = 0;
 539
 540     seconds_remaining = (int)(remaining_time * 3600.0);
 541
 542     hours = seconds_remaining / 3600;
 543     seconds = seconds_remaining - (hours * 3600);
 544     minutes = seconds / 60;
 545     seconds -= (minutes * 60);
 546
 547     if (status != CS_CHARGING) {
 548         if (hide_seconds)
 549             (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d",
 550                            max(hours, 0), max(minutes, 0));
 551         else
 552             (void)snprintf(remainingbuf, sizeof(remainingbuf), "%02d:%02d:%02d",
 553                            max(hours, 0), max(minutes, 0), max(seconds, 0));
 554
 555         if (low_threshold > 0) {
 556             if (strcasecmp(threshold_type, "time") == 0 && ((float)seconds_remaining / 60.0) < (u_int)low_threshold) {
 557                 START_COLOR("color_bad");
 558                 colorful_output = true;
 559             }
 560         }
 561     } else {
 562         if (hide_seconds)
 563             (void)snprintf(remainingbuf, sizeof(remainingbuf), "(%02d:%02d until full)",
 564                            max(hours, 0), max(minutes, 0));
 565         else
 566             (void)snprintf(remainingbuf, sizeof(remainingbuf), "(%02d:%02d:%02d until full)",
 567                            max(hours, 0), max(minutes, 0), max(seconds, 0));
 568     }
 569
 570     empty_time = time(NULL);
 571     empty_time += seconds_remaining;
 572     empty_tm = localtime(&empty_time);
 573
 574     /* No need to show empty time if battery is charging */
 575     if (status != CS_CHARGING) {
 576         if (hide_seconds)
 577             (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d",
 578                            max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0));
 579         else
 580             (void)snprintf(emptytimebuf, sizeof(emptytimebuf), "%02d:%02d:%02d",
 581                            max(empty_tm->tm_hour, 0), max(empty_tm->tm_min, 0), max(empty_tm->tm_sec, 0));
 582     }
 583
 584     (void)snprintf(consumptionbuf, sizeof(consumptionbuf), "%1.2fW",
 585                    ((float)present_rate / 1000.0 / 1000.0));
 586 #endif
 587
 588 #define EAT_SPACE_FROM_OUTPUT_IF_EMPTY(_buf)              \
 589     do {                                                  \
 590         if (strlen(_buf) == 0) {                          \
 591             if (outwalk > buffer && isspace(outwalk[-1])) \
 592                 outwalk--;                                \
 593             else if (isspace(*(walk + 1)))                \
 594                 walk++;                                   \
 595         }                                                 \
 596     } while (0)
 597
 598     for (walk = format; *walk != '\0'; walk++) {
 599         if (*walk != '%') {
 600             *(outwalk++) = *walk;
 601             continue;
 602         }
 603
 604         if (BEGINS_WITH(walk + 1, "status")) {
 605             outwalk += sprintf(outwalk, "%s", statusbuf);
 606             walk += strlen("status");
 607         } else if (BEGINS_WITH(walk + 1, "percentage")) {
 608             outwalk += sprintf(outwalk, "%s", percentagebuf);
 609             walk += strlen("percentage");
 610         } else if (BEGINS_WITH(walk + 1, "remaining")) {
 611             outwalk += sprintf(outwalk, "%s", remainingbuf);
 612             walk += strlen("remaining");
 613             EAT_SPACE_FROM_OUTPUT_IF_EMPTY(remainingbuf);
 614         } else if (BEGINS_WITH(walk + 1, "emptytime")) {
 615             outwalk += sprintf(outwalk, "%s", emptytimebuf);
 616             walk += strlen("emptytime");
 617             EAT_SPACE_FROM_OUTPUT_IF_EMPTY(emptytimebuf);
 618         } else if (BEGINS_WITH(walk + 1, "consumption")) {
 619             outwalk += sprintf(outwalk, "%s", consumptionbuf);
 620             walk += strlen("consumption");
 621             EAT_SPACE_FROM_OUTPUT_IF_EMPTY(consumptionbuf);
 622         }
 623     }
 624
 625     if (colorful_output)
 626         END_COLOR;
 627
 628     OUTPUT_FULL_TEXT(buffer);
 629 }