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