plugins/text/pretty/print.c

   1 /*
   2  * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  *
   5  * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  */
  25
  26 #include <babeltrace/babeltrace.h>
  27 #include <babeltrace/bitfield-internal.h>
  28 #include <babeltrace/common-internal.h>
  29 #include <babeltrace/compat/time-internal.h>
  30 #include <babeltrace/assert-internal.h>
  31 #include <inttypes.h>
  32 #include <ctype.h>
  33 #include "pretty.h"
  34
  35 #define NSEC_PER_SEC 1000000000LL
  36
  37 #define COLOR_NAME              BT_COMMON_COLOR_BOLD
  38 #define COLOR_FIELD_NAME        BT_COMMON_COLOR_FG_CYAN
  39 #define COLOR_RST               BT_COMMON_COLOR_RESET
  40 #define COLOR_STRING_VALUE      BT_COMMON_COLOR_BOLD
  41 #define COLOR_NUMBER_VALUE      BT_COMMON_COLOR_BOLD
  42 #define COLOR_ENUM_MAPPING_NAME BT_COMMON_COLOR_BOLD
  43 #define COLOR_UNKNOWN           BT_COMMON_COLOR_BOLD BT_COMMON_COLOR_FG_RED
  44 #define COLOR_EVENT_NAME        BT_COMMON_COLOR_BOLD BT_COMMON_COLOR_FG_MAGENTA
  45 #define COLOR_TIMESTAMP         BT_COMMON_COLOR_BOLD BT_COMMON_COLOR_FG_YELLOW
  46
  47 struct timestamp {
  48         int64_t real_timestamp; /* Relative to UNIX epoch. */
  49         uint64_t clock_snapshot;        /* In cycles. */
  50 };
  51
  52 static
  53 int print_field(struct pretty_component *pretty,
  54                 const bt_field *field, bool print_names,
  55                 GQuark *filters_fields, int filter_array_len);
  56
  57 static
  58 void print_name_equal(struct pretty_component *pretty, const char *name)
  59 {
  60         if (pretty->use_colors) {
  61                 g_string_append_printf(pretty->string, "%s%s%s = ", COLOR_NAME,
  62                         name, COLOR_RST);
  63         } else {
  64                 g_string_append_printf(pretty->string, "%s = ", name);
  65         }
  66 }
  67
  68 static
  69 void print_field_name_equal(struct pretty_component *pretty, const char *name)
  70 {
  71         if (pretty->use_colors) {
  72                 g_string_append_printf(pretty->string, "%s%s%s = ",
  73                         COLOR_FIELD_NAME, name, COLOR_RST);
  74         } else {
  75                 g_string_append_printf(pretty->string, "%s = ", name);
  76         }
  77 }
  78
  79 static
  80 void print_timestamp_cycles(struct pretty_component *pretty,
  81                 const bt_clock_snapshot *clock_snapshot, bool update_last)
  82 {
  83         uint64_t cycles;
  84
  85         cycles = bt_clock_snapshot_get_value(clock_snapshot);
  86         g_string_append_printf(pretty->string, "%020" PRIu64, cycles);
  87
  88         if (update_last) {
  89                 if (pretty->last_cycles_timestamp != -1ULL) {
  90                         pretty->delta_cycles = cycles - pretty->last_cycles_timestamp;
  91                 }
  92
  93                 pretty->last_cycles_timestamp = cycles;
  94         }
  95 }
  96
  97 static
  98 void print_timestamp_wall(struct pretty_component *pretty,
  99                 const bt_clock_snapshot *clock_snapshot, bool update_last)
 100 {
 101         int ret;
 102         int64_t ts_nsec = 0;    /* add configurable offset */
 103         int64_t ts_sec = 0;     /* add configurable offset */
 104         uint64_t ts_sec_abs, ts_nsec_abs;
 105         bool is_negative;
 106
 107         if (!clock_snapshot) {
 108                 g_string_append(pretty->string, "??:??:??.?????????");
 109                 return;
 110         }
 111
 112         ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, &ts_nsec);
 113         if (ret) {
 114                 // TODO: log, this is unexpected
 115                 g_string_append(pretty->string, "Error");
 116                 return;
 117         }
 118
 119         if (update_last) {
 120                 if (pretty->last_real_timestamp != -1ULL) {
 121                         pretty->delta_real_timestamp = ts_nsec - pretty->last_real_timestamp;
 122                 }
 123
 124                 pretty->last_real_timestamp = ts_nsec;
 125         }
 126
 127         ts_sec += ts_nsec / NSEC_PER_SEC;
 128         ts_nsec = ts_nsec % NSEC_PER_SEC;
 129
 130         if (ts_sec >= 0 && ts_nsec >= 0) {
 131                 is_negative = false;
 132                 ts_sec_abs = ts_sec;
 133                 ts_nsec_abs = ts_nsec;
 134         } else if (ts_sec > 0 && ts_nsec < 0) {
 135                 is_negative = false;
 136                 ts_sec_abs = ts_sec - 1;
 137                 ts_nsec_abs = NSEC_PER_SEC + ts_nsec;
 138         } else if (ts_sec == 0 && ts_nsec < 0) {
 139                 is_negative = true;
 140                 ts_sec_abs = ts_sec;
 141                 ts_nsec_abs = -ts_nsec;
 142         } else if (ts_sec < 0 && ts_nsec > 0) {
 143                 is_negative = true;
 144                 ts_sec_abs = -(ts_sec + 1);
 145                 ts_nsec_abs = NSEC_PER_SEC - ts_nsec;
 146         } else if (ts_sec < 0 && ts_nsec == 0) {
 147                 is_negative = true;
 148                 ts_sec_abs = -ts_sec;
 149                 ts_nsec_abs = ts_nsec;
 150         } else {        /* (ts_sec < 0 && ts_nsec < 0) */
 151                 is_negative = true;
 152                 ts_sec_abs = -ts_sec;
 153                 ts_nsec_abs = -ts_nsec;
 154         }
 155
 156         if (!pretty->options.clock_seconds) {
 157                 struct tm tm;
 158                 time_t time_s = (time_t) ts_sec_abs;
 159
 160                 if (is_negative && !pretty->negative_timestamp_warning_done) {
 161                         // TODO: log instead
 162                         fprintf(stderr, "[warning] Fallback to [sec.ns] to print negative time value. Use --clock-seconds.\n");
 163                         pretty->negative_timestamp_warning_done = true;
 164                         goto seconds;
 165                 }
 166
 167                 if (!pretty->options.clock_gmt) {
 168                         struct tm *res;
 169
 170                         res = bt_localtime_r(&time_s, &tm);
 171                         if (!res) {
 172                                 // TODO: log instead
 173                                 fprintf(stderr, "[warning] Unable to get localtime.\n");
 174                                 goto seconds;
 175                         }
 176                 } else {
 177                         struct tm *res;
 178
 179                         res = bt_gmtime_r(&time_s, &tm);
 180                         if (!res) {
 181                                 // TODO: log instead
 182                                 fprintf(stderr, "[warning] Unable to get gmtime.\n");
 183                                 goto seconds;
 184                         }
 185                 }
 186                 if (pretty->options.clock_date) {
 187                         char timestr[26];
 188                         size_t res;
 189
 190                         /* Print date and time */
 191                         res = strftime(timestr, sizeof(timestr),
 192                                         "%Y-%m-%d ", &tm);
 193                         if (!res) {
 194                                 // TODO: log instead
 195                                 fprintf(stderr, "[warning] Unable to print ascii time.\n");
 196                                 goto seconds;
 197                         }
 198
 199                         g_string_append(pretty->string, timestr);
 200                 }
 201
 202                 /* Print time in HH:MM:SS.ns */
 203                 g_string_append_printf(pretty->string,
 204                         "%02d:%02d:%02d.%09" PRIu64, tm.tm_hour, tm.tm_min,
 205                         tm.tm_sec, ts_nsec_abs);
 206                 goto end;
 207         }
 208 seconds:
 209         g_string_append_printf(pretty->string, "%s%" PRId64 ".%09" PRIu64,
 210                 is_negative ? "-" : "", ts_sec_abs, ts_nsec_abs);
 211 end:
 212         return;
 213 }
 214
 215 static
 216 int print_event_timestamp(struct pretty_component *pretty,
 217                 const bt_message *event_msg, bool *start_line)
 218 {
 219         bool print_names = pretty->options.print_header_field_names;
 220         int ret = 0;
 221         const bt_clock_snapshot *clock_snapshot = NULL;
 222
 223         if (!bt_message_event_borrow_stream_class_default_clock_class_const(
 224                         event_msg)) {
 225                 /* No default clock class: skip the timestamp without an error */
 226                 goto end;
 227         }
 228
 229         if (bt_message_event_borrow_default_clock_snapshot_const(event_msg,
 230                         &clock_snapshot) != BT_CLOCK_SNAPSHOT_STATE_KNOWN) {
 231                 /*
 232                  * No known default clock value: skip the timestamp
 233                  * without an error.
 234                  */
 235                 goto end;
 236         }
 237
 238         if (print_names) {
 239                 print_name_equal(pretty, "timestamp");
 240         } else {
 241                 g_string_append(pretty->string, "[");
 242         }
 243         if (pretty->use_colors) {
 244                 g_string_append(pretty->string, COLOR_TIMESTAMP);
 245         }
 246         if (pretty->options.print_timestamp_cycles) {
 247                 print_timestamp_cycles(pretty, clock_snapshot, true);
 248         } else {
 249                 print_timestamp_wall(pretty, clock_snapshot, true);
 250         }
 251         if (pretty->use_colors) {
 252                 g_string_append(pretty->string, COLOR_RST);
 253         }
 254
 255         if (!print_names)
 256                 g_string_append(pretty->string, "] ");
 257
 258         if (pretty->options.print_delta_field) {
 259                 if (print_names) {
 260                         g_string_append(pretty->string, ", ");
 261                         print_name_equal(pretty, "delta");
 262                 } else {
 263                         g_string_append(pretty->string, "(");
 264                 }
 265                 if (pretty->options.print_timestamp_cycles) {
 266                         if (pretty->delta_cycles == -1ULL) {
 267                                 g_string_append(pretty->string,
 268                                         "+??????????\?\?"); /* Not a trigraph. */
 269                         } else {
 270                                 g_string_append_printf(pretty->string,
 271                                         "+%012" PRIu64, pretty->delta_cycles);
 272                         }
 273                 } else {
 274                         if (pretty->delta_real_timestamp != -1ULL) {
 275                                 uint64_t delta_sec, delta_nsec, delta;
 276
 277                                 delta = pretty->delta_real_timestamp;
 278                                 delta_sec = delta / NSEC_PER_SEC;
 279                                 delta_nsec = delta % NSEC_PER_SEC;
 280                                 g_string_append_printf(pretty->string,
 281                                         "+%" PRIu64 ".%09" PRIu64,
 282                                         delta_sec, delta_nsec);
 283                         } else {
 284                                 g_string_append(pretty->string, "+?.?????????");
 285                         }
 286                 }
 287                 if (!print_names) {
 288                         g_string_append(pretty->string, ") ");
 289                 }
 290         }
 291         *start_line = !print_names;
 292
 293 end:
 294         return ret;
 295 }
 296
 297 static
 298 int print_event_header(struct pretty_component *pretty,
 299                 const bt_message *event_msg)
 300 {
 301         bool print_names = pretty->options.print_header_field_names;
 302         int ret = 0;
 303         const bt_event_class *event_class = NULL;
 304         const bt_stream_class *stream_class = NULL;
 305         const bt_trace_class *trace_class = NULL;
 306         const bt_packet *packet = NULL;
 307         const bt_stream *stream = NULL;
 308         const bt_trace *trace = NULL;
 309         const bt_event *event = bt_message_event_borrow_event_const(event_msg);
 310         int dom_print = 0;
 311         bt_property_availability prop_avail;
 312
 313         event_class = bt_event_borrow_class_const(event);
 314         stream_class = bt_event_class_borrow_stream_class_const(event_class);
 315         trace_class = bt_stream_class_borrow_trace_class_const(stream_class);
 316         packet = bt_event_borrow_packet_const(event);
 317         stream = bt_packet_borrow_stream_const(packet);
 318         trace = bt_stream_borrow_trace_const(stream);
 319         ret = print_event_timestamp(pretty, event_msg, &pretty->start_line);
 320         if (ret) {
 321                 goto end;
 322         }
 323         if (pretty->options.print_trace_field) {
 324                 const char *name;
 325
 326                 name = bt_trace_get_name(trace);
 327                 if (name) {
 328                         if (!pretty->start_line) {
 329                                 g_string_append(pretty->string, ", ");
 330                         }
 331                         if (print_names) {
 332                                 print_name_equal(pretty, "trace");
 333                         }
 334
 335                         g_string_append(pretty->string, name);
 336
 337                         if (print_names) {
 338                                 g_string_append(pretty->string, ", ");
 339                         }
 340                 }
 341         }
 342         if (pretty->options.print_trace_hostname_field) {
 343                 const bt_value *hostname_str;
 344
 345                 hostname_str = bt_trace_class_borrow_environment_entry_value_by_name_const(
 346                         trace_class, "hostname");
 347                 if (hostname_str) {
 348                         const char *str;
 349
 350                         if (!pretty->start_line) {
 351                                 g_string_append(pretty->string, ", ");
 352                         }
 353                         if (print_names) {
 354                                 print_name_equal(pretty, "trace:hostname");
 355                         }
 356                         str = bt_value_string_get(hostname_str);
 357                         g_string_append(pretty->string, str);
 358                         dom_print = 1;
 359                 }
 360         }
 361         if (pretty->options.print_trace_domain_field) {
 362                 const bt_value *domain_str;
 363
 364                 domain_str = bt_trace_class_borrow_environment_entry_value_by_name_const(
 365                         trace_class, "domain");
 366                 if (domain_str) {
 367                         const char *str;
 368
 369                         if (!pretty->start_line) {
 370                                 g_string_append(pretty->string, ", ");
 371                         }
 372                         if (print_names) {
 373                                 print_name_equal(pretty, "trace:domain");
 374                         } else if (dom_print) {
 375                                 g_string_append(pretty->string, ":");
 376                         }
 377                         str = bt_value_string_get(domain_str);
 378                         g_string_append(pretty->string, str);
 379                         dom_print = 1;
 380                 }
 381         }
 382         if (pretty->options.print_trace_procname_field) {
 383                 const bt_value *procname_str;
 384
 385                 procname_str = bt_trace_class_borrow_environment_entry_value_by_name_const(
 386                         trace_class, "procname");
 387                 if (procname_str) {
 388                         const char *str;
 389
 390                         if (!pretty->start_line) {
 391                                 g_string_append(pretty->string, ", ");
 392                         }
 393                         if (print_names) {
 394                                 print_name_equal(pretty, "trace:procname");
 395                         } else if (dom_print) {
 396                                 g_string_append(pretty->string, ":");
 397                         }
 398                         str = bt_value_string_get(procname_str);
 399                         g_string_append(pretty->string, str);
 400                         dom_print = 1;
 401                 }
 402         }
 403         if (pretty->options.print_trace_vpid_field) {
 404                 const bt_value *vpid_value;
 405
 406                 vpid_value = bt_trace_class_borrow_environment_entry_value_by_name_const(
 407                         trace_class, "vpid");
 408                 if (vpid_value) {
 409                         int64_t value;
 410
 411                         if (!pretty->start_line) {
 412                                 g_string_append(pretty->string, ", ");
 413                         }
 414                         if (print_names) {
 415                                 print_name_equal(pretty, "trace:vpid");
 416                         } else if (dom_print) {
 417                                 g_string_append(pretty->string, ":");
 418                         }
 419                         value = bt_value_signed_integer_get(vpid_value);
 420                         g_string_append_printf(pretty->string,
 421                                 "(%" PRId64 ")", value);
 422                         dom_print = 1;
 423                 }
 424         }
 425         if (pretty->options.print_loglevel_field) {
 426                 static const char *log_level_names[] = {
 427                         [ BT_EVENT_CLASS_LOG_LEVEL_EMERGENCY ] = "TRACE_EMERG",
 428                         [ BT_EVENT_CLASS_LOG_LEVEL_ALERT ] = "TRACE_ALERT",
 429                         [ BT_EVENT_CLASS_LOG_LEVEL_CRITICAL ] = "TRACE_CRIT",
 430                         [ BT_EVENT_CLASS_LOG_LEVEL_ERROR ] = "TRACE_ERR",
 431                         [ BT_EVENT_CLASS_LOG_LEVEL_WARNING ] = "TRACE_WARNING",
 432                         [ BT_EVENT_CLASS_LOG_LEVEL_NOTICE ] = "TRACE_NOTICE",
 433                         [ BT_EVENT_CLASS_LOG_LEVEL_INFO ] = "TRACE_INFO",
 434                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_SYSTEM ] = "TRACE_DEBUG_SYSTEM",
 435                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_PROGRAM ] = "TRACE_DEBUG_PROGRAM",
 436                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_PROCESS ] = "TRACE_DEBUG_PROCESS",
 437                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_MODULE ] = "TRACE_DEBUG_MODULE",
 438                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_UNIT ] = "TRACE_DEBUG_UNIT",
 439                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_FUNCTION ] = "TRACE_DEBUG_FUNCTION",
 440                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_LINE ] = "TRACE_DEBUG_LINE",
 441                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG ] = "TRACE_DEBUG",
 442                 };
 443                 bt_event_class_log_level log_level;
 444                 const char *log_level_str = NULL;
 445
 446                 prop_avail = bt_event_class_get_log_level(event_class,
 447                         &log_level);
 448                 if (prop_avail == BT_PROPERTY_AVAILABILITY_AVAILABLE) {
 449                         log_level_str = log_level_names[log_level];
 450                         BT_ASSERT(log_level_str);
 451
 452                         if (!pretty->start_line) {
 453                                 g_string_append(pretty->string, ", ");
 454                         }
 455                         if (print_names) {
 456                                 print_name_equal(pretty, "loglevel");
 457                         } else if (dom_print) {
 458                                 g_string_append(pretty->string, ":");
 459                         }
 460
 461                         g_string_append(pretty->string, log_level_str);
 462                         g_string_append_printf(
 463                                 pretty->string, " (%d)", (int) log_level);
 464                         dom_print = 1;
 465                 }
 466         }
 467         if (pretty->options.print_emf_field) {
 468                 const char *uri_str;
 469
 470                 uri_str = bt_event_class_get_emf_uri(event_class);
 471                 if (uri_str) {
 472                         if (!pretty->start_line) {
 473                                 g_string_append(pretty->string, ", ");
 474                         }
 475                         if (print_names) {
 476                                 print_name_equal(pretty, "model.emf.uri");
 477                         } else if (dom_print) {
 478                                 g_string_append(pretty->string, ":");
 479                         }
 480
 481                         g_string_append(pretty->string, uri_str);
 482                         dom_print = 1;
 483                 }
 484         }
 485         if (dom_print && !print_names) {
 486                 g_string_append(pretty->string, " ");
 487         }
 488         if (!pretty->start_line) {
 489                 g_string_append(pretty->string, ", ");
 490         }
 491         pretty->start_line = true;
 492         if (print_names) {
 493                 print_name_equal(pretty, "name");
 494         }
 495         if (pretty->use_colors) {
 496                 g_string_append(pretty->string, COLOR_EVENT_NAME);
 497         }
 498         g_string_append(pretty->string, bt_event_class_get_name(event_class));
 499         if (pretty->use_colors) {
 500                 g_string_append(pretty->string, COLOR_RST);
 501         }
 502         if (!print_names) {
 503                 g_string_append(pretty->string, ": ");
 504         } else {
 505                 g_string_append(pretty->string, ", ");
 506         }
 507
 508 end:
 509         return ret;
 510 }
 511
 512 static
 513 int print_integer(struct pretty_component *pretty,
 514                 const bt_field *field)
 515 {
 516         int ret = 0;
 517         bt_field_class_integer_preferred_display_base base;
 518         const bt_field_class *int_fc;
 519         union {
 520                 uint64_t u;
 521                 int64_t s;
 522         } v;
 523         bool rst_color = false;
 524         bt_field_class_type ft_type;
 525
 526         int_fc = bt_field_borrow_class_const(field);
 527         BT_ASSERT(int_fc);
 528         ft_type = bt_field_get_class_type(field);
 529         if (ft_type == BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER ||
 530                         ft_type == BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION) {
 531                 v.u = bt_field_unsigned_integer_get_value(field);
 532         } else {
 533                 v.s = bt_field_signed_integer_get_value(field);
 534         }
 535
 536         if (pretty->use_colors) {
 537                 g_string_append(pretty->string, COLOR_NUMBER_VALUE);
 538                 rst_color = true;
 539         }
 540
 541         base = bt_field_class_integer_get_preferred_display_base(int_fc);
 542         switch (base) {
 543         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_BINARY:
 544         {
 545                 int bitnr, len;
 546
 547                 len = bt_field_class_integer_get_field_value_range(int_fc);
 548                 g_string_append(pretty->string, "0b");
 549                 v.u = _bt_piecewise_lshift(v.u, 64 - len);
 550                 for (bitnr = 0; bitnr < len; bitnr++) {
 551                         g_string_append_printf(pretty->string, "%u", (v.u & (1ULL << 63)) ? 1 : 0);
 552                         v.u = _bt_piecewise_lshift(v.u, 1);
 553                 }
 554                 break;
 555         }
 556         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_OCTAL:
 557         {
 558                 if (ft_type == BT_FIELD_CLASS_TYPE_SIGNED_INTEGER ||
 559                                 ft_type == BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION) {
 560                         int len;
 561
 562                         len = bt_field_class_integer_get_field_value_range(
 563                                 int_fc);
 564                         if (len < 64) {
 565                                 size_t rounded_len;
 566
 567                                 BT_ASSERT(len != 0);
 568                                 /* Round length to the nearest 3-bit */
 569                                 rounded_len = (((len - 1) / 3) + 1) * 3;
 570                                 v.u &= ((uint64_t) 1 << rounded_len) - 1;
 571                         }
 572                 }
 573
 574                 g_string_append_printf(pretty->string, "0%" PRIo64, v.u);
 575                 break;
 576         }
 577         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_DECIMAL:
 578                 if (ft_type == BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER ||
 579                                 ft_type == BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION) {
 580                         g_string_append_printf(pretty->string, "%" PRIu64, v.u);
 581                 } else {
 582                         g_string_append_printf(pretty->string, "%" PRId64, v.s);
 583                 }
 584                 break;
 585         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_HEXADECIMAL:
 586         {
 587                 int len;
 588
 589                 len = bt_field_class_integer_get_field_value_range(int_fc);
 590                 if (len < 64) {
 591                         /* Round length to the nearest nibble */
 592                         uint8_t rounded_len = ((len + 3) & ~0x3);
 593
 594                         v.u &= ((uint64_t) 1 << rounded_len) - 1;
 595                 }
 596
 597                 g_string_append_printf(pretty->string, "0x%" PRIX64, v.u);
 598                 break;
 599         }
 600         default:
 601                 ret = -1;
 602                 goto end;
 603         }
 604 end:
 605         if (rst_color) {
 606                 g_string_append(pretty->string, COLOR_RST);
 607         }
 608         return ret;
 609 }
 610
 611 static
 612 void print_escape_string(struct pretty_component *pretty, const char *str)
 613 {
 614         int i;
 615
 616         g_string_append_c(pretty->string, '"');
 617
 618         for (i = 0; i < strlen(str); i++) {
 619                 /* Escape sequences not recognized by iscntrl(). */
 620                 switch (str[i]) {
 621                 case '\\':
 622                         g_string_append(pretty->string, "\\\\");
 623                         continue;
 624                 case '\'':
 625                         g_string_append(pretty->string, "\\\'");
 626                         continue;
 627                 case '\"':
 628                         g_string_append(pretty->string, "\\\"");
 629                         continue;
 630                 case '\?':
 631                         g_string_append(pretty->string, "\\\?");
 632                         continue;
 633                 }
 634
 635                 /* Standard characters. */
 636                 if (!iscntrl(str[i])) {
 637                         g_string_append_c(pretty->string, str[i]);
 638                         continue;
 639                 }
 640
 641                 switch (str[i]) {
 642                 case '\0':
 643                         g_string_append(pretty->string, "\\0");
 644                         break;
 645                 case '\a':
 646                         g_string_append(pretty->string, "\\a");
 647                         break;
 648                 case '\b':
 649                         g_string_append(pretty->string, "\\b");
 650                         break;
 651                 case '\e':
 652                         g_string_append(pretty->string, "\\e");
 653                         break;
 654                 case '\f':
 655                         g_string_append(pretty->string, "\\f");
 656                         break;
 657                 case '\n':
 658                         g_string_append(pretty->string, "\\n");
 659                         break;
 660                 case '\r':
 661                         g_string_append(pretty->string, "\\r");
 662                         break;
 663                 case '\t':
 664                         g_string_append(pretty->string, "\\t");
 665                         break;
 666                 case '\v':
 667                         g_string_append(pretty->string, "\\v");
 668                         break;
 669                 default:
 670                         /* Unhandled control-sequence, print as hex. */
 671                         g_string_append_printf(pretty->string, "\\x%02x", str[i]);
 672                         break;
 673                 }
 674         }
 675
 676         g_string_append_c(pretty->string, '"');
 677 }
 678
 679 static
 680 int print_enum(struct pretty_component *pretty,
 681                 const bt_field *field)
 682 {
 683         int ret = 0;
 684         const bt_field_class *enumeration_field_class = NULL;
 685         bt_field_class_enumeration_mapping_label_array label_array;
 686         uint64_t label_count;
 687         uint64_t i;
 688
 689         enumeration_field_class = bt_field_borrow_class_const(field);
 690         if (!enumeration_field_class) {
 691                 ret = -1;
 692                 goto end;
 693         }
 694
 695         switch (bt_field_get_class_type(field)) {
 696         case BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION:
 697                 ret = bt_field_unsigned_enumeration_get_mapping_labels(field,
 698                         &label_array, &label_count);
 699                 break;
 700         case BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION:
 701                 ret = bt_field_signed_enumeration_get_mapping_labels(field,
 702                         &label_array, &label_count);
 703                 break;
 704         default:
 705                 abort();
 706         }
 707
 708         if (ret) {
 709                 ret = -1;
 710                 goto end;
 711         }
 712
 713         g_string_append(pretty->string, "( ");
 714         if (label_count == 0) {
 715                 if (pretty->use_colors) {
 716                         g_string_append(pretty->string, COLOR_UNKNOWN);
 717                 }
 718                 g_string_append(pretty->string, "<unknown>");
 719                 if (pretty->use_colors) {
 720                         g_string_append(pretty->string, COLOR_RST);
 721                 }
 722                 goto skip_loop;
 723         }
 724         for (i = 0; i < label_count; i++) {
 725                 const char *mapping_name = label_array[i];
 726
 727                 if (i == 0) {
 728                         g_string_append(pretty->string, ", ");
 729                 }
 730                 if (pretty->use_colors) {
 731                         g_string_append(pretty->string, COLOR_ENUM_MAPPING_NAME);
 732                 }
 733                 print_escape_string(pretty, mapping_name);
 734                 if (pretty->use_colors) {
 735                         g_string_append(pretty->string, COLOR_RST);
 736                 }
 737         }
 738 skip_loop:
 739         g_string_append(pretty->string, " : container = ");
 740         ret = print_integer(pretty, field);
 741         if (ret != 0) {
 742                 goto end;
 743         }
 744         g_string_append(pretty->string, " )");
 745 end:
 746         return ret;
 747 }
 748
 749 static
 750 int filter_field_name(struct pretty_component *pretty, const char *field_name,
 751                 GQuark *filter_fields, int filter_array_len)
 752 {
 753         int i;
 754         GQuark field_quark = g_quark_try_string(field_name);
 755
 756         if (!field_quark || pretty->options.verbose) {
 757                 return 1;
 758         }
 759
 760         for (i = 0; i < filter_array_len; i++) {
 761                 if (field_quark == filter_fields[i]) {
 762                         return 0;
 763                 }
 764         }
 765         return 1;
 766 }
 767
 768 static
 769 int print_struct_field(struct pretty_component *pretty,
 770                 const bt_field *_struct,
 771                 const bt_field_class *struct_class,
 772                 uint64_t i, bool print_names, uint64_t *nr_printed_fields,
 773                 GQuark *filter_fields, int filter_array_len)
 774 {
 775         int ret = 0;
 776         const char *field_name;
 777         const bt_field *field = NULL;
 778         const bt_field_class_structure_member *member;
 779
 780         field = bt_field_structure_borrow_member_field_by_index_const(_struct, i);
 781         if (!field) {
 782                 ret = -1;
 783                 goto end;
 784         }
 785
 786         member = bt_field_class_structure_borrow_member_by_index_const(
 787                 struct_class, i);
 788         field_name = bt_field_class_structure_member_get_name(member);
 789
 790         if (filter_fields && !filter_field_name(pretty, field_name,
 791                                 filter_fields, filter_array_len)) {
 792                 ret = 0;
 793                 goto end;
 794         }
 795
 796         if (*nr_printed_fields > 0) {
 797                 g_string_append(pretty->string, ", ");
 798         } else {
 799                 g_string_append(pretty->string, " ");
 800         }
 801         if (print_names) {
 802                 print_field_name_equal(pretty, field_name);
 803         }
 804         ret = print_field(pretty, field, print_names, NULL, 0);
 805         *nr_printed_fields += 1;
 806
 807 end:
 808         return ret;
 809 }
 810
 811 static
 812 int print_struct(struct pretty_component *pretty,
 813                 const bt_field *_struct, bool print_names,
 814                 GQuark *filter_fields, int filter_array_len)
 815 {
 816         int ret = 0;
 817         const bt_field_class *struct_class = NULL;
 818         uint64_t nr_fields, i, nr_printed_fields;
 819
 820         struct_class = bt_field_borrow_class_const(_struct);
 821         if (!struct_class) {
 822                 ret = -1;
 823                 goto end;
 824         }
 825
 826         nr_fields = bt_field_class_structure_get_member_count(struct_class);
 827
 828         g_string_append(pretty->string, "{");
 829         pretty->depth++;
 830         nr_printed_fields = 0;
 831         for (i = 0; i < nr_fields; i++) {
 832                 ret = print_struct_field(pretty, _struct, struct_class, i,
 833                                 print_names, &nr_printed_fields, filter_fields,
 834                                 filter_array_len);
 835                 if (ret != 0) {
 836                         goto end;
 837                 }
 838         }
 839         pretty->depth--;
 840         g_string_append(pretty->string, " }");
 841
 842 end:
 843         return ret;
 844 }
 845
 846 static
 847 int print_array_field(struct pretty_component *pretty,
 848                 const bt_field *array, uint64_t i, bool print_names)
 849 {
 850         const bt_field *field = NULL;
 851
 852         if (i != 0) {
 853                 g_string_append(pretty->string, ", ");
 854         } else {
 855                 g_string_append(pretty->string, " ");
 856         }
 857         if (print_names) {
 858                 g_string_append_printf(pretty->string, "[%" PRIu64 "] = ", i);
 859         }
 860
 861         field = bt_field_array_borrow_element_field_by_index_const(array, i);
 862         BT_ASSERT(field);
 863         return print_field(pretty, field, print_names, NULL, 0);
 864 }
 865
 866 static
 867 int print_array(struct pretty_component *pretty,
 868                 const bt_field *array, bool print_names)
 869 {
 870         int ret = 0;
 871         const bt_field_class *array_class = NULL;
 872         uint64_t len;
 873         uint64_t i;
 874
 875         array_class = bt_field_borrow_class_const(array);
 876         if (!array_class) {
 877                 ret = -1;
 878                 goto end;
 879         }
 880         len = bt_field_array_get_length(array);
 881         g_string_append(pretty->string, "[");
 882         pretty->depth++;
 883         for (i = 0; i < len; i++) {
 884                 ret = print_array_field(pretty, array, i, print_names);
 885                 if (ret != 0) {
 886                         goto end;
 887                 }
 888         }
 889         pretty->depth--;
 890         g_string_append(pretty->string, " ]");
 891
 892 end:
 893         return ret;
 894 }
 895
 896 static
 897 int print_sequence_field(struct pretty_component *pretty,
 898                 const bt_field *seq, uint64_t i, bool print_names)
 899 {
 900         const bt_field *field = NULL;
 901
 902         if (i != 0) {
 903                 g_string_append(pretty->string, ", ");
 904         } else {
 905                 g_string_append(pretty->string, " ");
 906         }
 907         if (print_names) {
 908                 g_string_append_printf(pretty->string, "[%" PRIu64 "] = ", i);
 909         }
 910
 911         field = bt_field_array_borrow_element_field_by_index_const(seq, i);
 912         BT_ASSERT(field);
 913         return print_field(pretty, field, print_names, NULL, 0);
 914 }
 915
 916 static
 917 int print_sequence(struct pretty_component *pretty,
 918                 const bt_field *seq, bool print_names)
 919 {
 920         int ret = 0;
 921         uint64_t len;
 922         uint64_t i;
 923
 924         len = bt_field_array_get_length(seq);
 925         g_string_append(pretty->string, "[");
 926
 927         pretty->depth++;
 928         for (i = 0; i < len; i++) {
 929                 ret = print_sequence_field(pretty, seq, i, print_names);
 930                 if (ret != 0) {
 931                         goto end;
 932                 }
 933         }
 934         pretty->depth--;
 935         g_string_append(pretty->string, " ]");
 936
 937 end:
 938         return ret;
 939 }
 940
 941 static
 942 int print_variant(struct pretty_component *pretty,
 943                 const bt_field *variant, bool print_names)
 944 {
 945         int ret = 0;
 946         const bt_field *field = NULL;
 947
 948         field = bt_field_variant_borrow_selected_option_field_const(variant);
 949         BT_ASSERT(field);
 950         g_string_append(pretty->string, "{ ");
 951         pretty->depth++;
 952         if (print_names) {
 953                 // TODO: find tag's name using field path
 954                 // print_field_name_equal(pretty, tag_choice);
 955         }
 956         ret = print_field(pretty, field, print_names, NULL, 0);
 957         if (ret != 0) {
 958                 goto end;
 959         }
 960         pretty->depth--;
 961         g_string_append(pretty->string, " }");
 962
 963 end:
 964         return ret;
 965 }
 966
 967 static
 968 int print_field(struct pretty_component *pretty,
 969                 const bt_field *field, bool print_names,
 970                 GQuark *filter_fields, int filter_array_len)
 971 {
 972         bt_field_class_type class_id;
 973
 974         class_id = bt_field_get_class_type(field);
 975         switch (class_id) {
 976         case BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER:
 977         case BT_FIELD_CLASS_TYPE_SIGNED_INTEGER:
 978                 return print_integer(pretty, field);
 979         case BT_FIELD_CLASS_TYPE_REAL:
 980         {
 981                 double v;
 982
 983                 v = bt_field_real_get_value(field);
 984                 if (pretty->use_colors) {
 985                         g_string_append(pretty->string, COLOR_NUMBER_VALUE);
 986                 }
 987                 g_string_append_printf(pretty->string, "%g", v);
 988                 if (pretty->use_colors) {
 989                         g_string_append(pretty->string, COLOR_RST);
 990                 }
 991                 return 0;
 992         }
 993         case BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION:
 994         case BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION:
 995                 return print_enum(pretty, field);
 996         case BT_FIELD_CLASS_TYPE_STRING:
 997         {
 998                 const char *str;
 999
1000                 str = bt_field_string_get_value(field);
1001                 if (!str) {
1002                         return -1;
1003                 }
1004
1005                 if (pretty->use_colors) {
1006                         g_string_append(pretty->string, COLOR_STRING_VALUE);
1007                 }
1008                 print_escape_string(pretty, str);
1009                 if (pretty->use_colors) {
1010                         g_string_append(pretty->string, COLOR_RST);
1011                 }
1012                 return 0;
1013         }
1014         case BT_FIELD_CLASS_TYPE_STRUCTURE:
1015                 return print_struct(pretty, field, print_names, filter_fields,
1016                                 filter_array_len);
1017         case BT_FIELD_CLASS_TYPE_VARIANT:
1018                 return print_variant(pretty, field, print_names);
1019         case BT_FIELD_CLASS_TYPE_STATIC_ARRAY:
1020                 return print_array(pretty, field, print_names);
1021         case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY:
1022                 return print_sequence(pretty, field, print_names);
1023         default:
1024                 // TODO: log instead
1025                 fprintf(pretty->err, "[error] Unknown type id: %d\n", (int) class_id);
1026                 return -1;
1027         }
1028 }
1029
1030 static
1031 int print_stream_packet_context(struct pretty_component *pretty,
1032                 const bt_event *event)
1033 {
1034         int ret = 0;
1035         const bt_packet *packet = NULL;
1036         const bt_field *main_field = NULL;
1037
1038         packet = bt_event_borrow_packet_const(event);
1039         if (!packet) {
1040                 ret = -1;
1041                 goto end;
1042         }
1043         main_field = bt_packet_borrow_context_field_const(packet);
1044         if (!main_field) {
1045                 goto end;
1046         }
1047         if (!pretty->start_line) {
1048                 g_string_append(pretty->string, ", ");
1049         }
1050         pretty->start_line = false;
1051         if (pretty->options.print_scope_field_names) {
1052                 print_name_equal(pretty, "stream.packet.context");
1053         }
1054         ret = print_field(pretty, main_field,
1055                         pretty->options.print_context_field_names,
1056                         stream_packet_context_quarks,
1057                         STREAM_PACKET_CONTEXT_QUARKS_LEN);
1058
1059 end:
1060         return ret;
1061 }
1062
1063 static
1064 int print_stream_event_context(struct pretty_component *pretty,
1065                 const bt_event *event)
1066 {
1067         int ret = 0;
1068         const bt_field *main_field = NULL;
1069
1070         main_field = bt_event_borrow_common_context_field_const(event);
1071         if (!main_field) {
1072                 goto end;
1073         }
1074         if (!pretty->start_line) {
1075                 g_string_append(pretty->string, ", ");
1076         }
1077         pretty->start_line = false;
1078         if (pretty->options.print_scope_field_names) {
1079                 print_name_equal(pretty, "stream.event.context");
1080         }
1081         ret = print_field(pretty, main_field,
1082                         pretty->options.print_context_field_names, NULL, 0);
1083
1084 end:
1085         return ret;
1086 }
1087
1088 static
1089 int print_event_context(struct pretty_component *pretty,
1090                 const bt_event *event)
1091 {
1092         int ret = 0;
1093         const bt_field *main_field = NULL;
1094
1095         main_field = bt_event_borrow_specific_context_field_const(event);
1096         if (!main_field) {
1097                 goto end;
1098         }
1099         if (!pretty->start_line) {
1100                 g_string_append(pretty->string, ", ");
1101         }
1102         pretty->start_line = false;
1103         if (pretty->options.print_scope_field_names) {
1104                 print_name_equal(pretty, "event.context");
1105         }
1106         ret = print_field(pretty, main_field,
1107                         pretty->options.print_context_field_names, NULL, 0);
1108
1109 end:
1110         return ret;
1111 }
1112
1113 static
1114 int print_event_payload(struct pretty_component *pretty,
1115                 const bt_event *event)
1116 {
1117         int ret = 0;
1118         const bt_field *main_field = NULL;
1119
1120         main_field = bt_event_borrow_payload_field_const(event);
1121         if (!main_field) {
1122                 goto end;
1123         }
1124         if (!pretty->start_line) {
1125                 g_string_append(pretty->string, ", ");
1126         }
1127         pretty->start_line = false;
1128         if (pretty->options.print_scope_field_names) {
1129                 print_name_equal(pretty, "event.fields");
1130         }
1131         ret = print_field(pretty, main_field,
1132                         pretty->options.print_payload_field_names, NULL, 0);
1133
1134 end:
1135         return ret;
1136 }
1137
1138 static
1139 int flush_buf(FILE *stream, struct pretty_component *pretty)
1140 {
1141         int ret = 0;
1142
1143         if (pretty->string->len == 0) {
1144                 goto end;
1145         }
1146
1147         if (fwrite(pretty->string->str, pretty->string->len, 1, stream) != 1) {
1148                 ret = -1;
1149         }
1150
1151 end:
1152         return ret;
1153 }
1154
1155 BT_HIDDEN
1156 int pretty_print_event(struct pretty_component *pretty,
1157                 const bt_message *event_msg)
1158 {
1159         int ret;
1160         const bt_event *event =
1161                 bt_message_event_borrow_event_const(event_msg);
1162
1163         BT_ASSERT(event);
1164         pretty->start_line = true;
1165         g_string_assign(pretty->string, "");
1166         ret = print_event_header(pretty, event_msg);
1167         if (ret != 0) {
1168                 goto end;
1169         }
1170
1171         ret = print_stream_packet_context(pretty, event);
1172         if (ret != 0) {
1173                 goto end;
1174         }
1175
1176         ret = print_stream_event_context(pretty, event);
1177         if (ret != 0) {
1178                 goto end;
1179         }
1180
1181         ret = print_event_context(pretty, event);
1182         if (ret != 0) {
1183                 goto end;
1184         }
1185
1186         ret = print_event_payload(pretty, event);
1187         if (ret != 0) {
1188                 goto end;
1189         }
1190
1191         g_string_append_c(pretty->string, '\n');
1192         if (flush_buf(pretty->out, pretty)) {
1193                 ret = -1;
1194                 goto end;
1195         }
1196
1197 end:
1198         return ret;
1199 }
1200
1201 static
1202 int print_discarded_elements_msg(struct pretty_component *pretty,
1203                 const bt_stream *stream,
1204                 const bt_clock_snapshot *begin_clock_snapshot,
1205                 const bt_clock_snapshot *end_clock_snapshot,
1206                 uint64_t count, const char *elem_type)
1207 {
1208         int ret = 0;
1209         const bt_stream_class *stream_class = NULL;
1210         const bt_trace *trace = NULL;
1211         const char *stream_name;
1212         const char *trace_name;
1213         bt_uuid trace_uuid;
1214         int64_t stream_class_id;
1215         int64_t stream_id;
1216         const char *init_msg;
1217
1218         /* Stream name */
1219         stream_name = bt_stream_get_name(stream);
1220         if (!stream_name) {
1221                 stream_name = "(unknown)";
1222         }
1223
1224         /* Stream class ID */
1225         stream_class = bt_stream_borrow_class_const(stream);
1226         BT_ASSERT(stream_class);
1227         stream_class_id = bt_stream_class_get_id(stream_class);
1228
1229         /* Stream ID */
1230         stream_id = bt_stream_get_id(stream);
1231
1232         /* Trace name */
1233         trace = bt_stream_borrow_trace_const(stream);
1234         BT_ASSERT(trace);
1235         trace_name = bt_trace_get_name(trace);
1236         if (!trace_name) {
1237                 trace_name = "(unknown)";
1238         }
1239
1240         /* Trace UUID */
1241         trace_uuid = bt_trace_class_get_uuid(
1242                 bt_trace_borrow_class_const(trace));
1243
1244         /* Format message */
1245         g_string_assign(pretty->string, "");
1246
1247         if (count == UINT64_C(-1)) {
1248                 init_msg = "Tracer may have discarded";
1249         } else {
1250                 init_msg = "Tracer discarded";
1251         }
1252
1253         g_string_append_printf(pretty->string,
1254                 "%s%sWARNING%s%s: %s ",
1255                 bt_common_color_fg_yellow(),
1256                 bt_common_color_bold(),
1257                 bt_common_color_reset(),
1258                 bt_common_color_fg_yellow(), init_msg);
1259
1260         if (count == UINT64_C(-1)) {
1261                 g_string_append_printf(pretty->string, "%ss", elem_type);
1262         } else {
1263                 g_string_append_printf(pretty->string,
1264                         "%" PRIu64 " %s%s", count, elem_type,
1265                         count == 1 ? "" : "s");
1266         }
1267
1268         if (begin_clock_snapshot && end_clock_snapshot) {
1269                 g_string_append(pretty->string, " between [");
1270                 print_timestamp_wall(pretty, begin_clock_snapshot, false);
1271                 g_string_append(pretty->string, "] and [");
1272                 print_timestamp_wall(pretty, end_clock_snapshot, false);
1273                 g_string_append(pretty->string, "]");
1274         } else {
1275                 g_string_append(pretty->string, "(unknown time range)");
1276         }
1277
1278         g_string_append_printf(pretty->string, " in trace \"%s\" ", trace_name);
1279
1280         if (trace_uuid) {
1281                 g_string_append_printf(pretty->string,
1282                         "(UUID: %02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x) ",
1283                         trace_uuid[0],
1284                         trace_uuid[1],
1285                         trace_uuid[2],
1286                         trace_uuid[3],
1287                         trace_uuid[4],
1288                         trace_uuid[5],
1289                         trace_uuid[6],
1290                         trace_uuid[7],
1291                         trace_uuid[8],
1292                         trace_uuid[9],
1293                         trace_uuid[10],
1294                         trace_uuid[11],
1295                         trace_uuid[12],
1296                         trace_uuid[13],
1297                         trace_uuid[14],
1298                         trace_uuid[15]);
1299         } else {
1300                 g_string_append(pretty->string, "(no UUID) ");
1301         }
1302
1303         g_string_append_printf(pretty->string,
1304                 "within stream \"%s\" (stream class ID: %" PRIu64 ", ",
1305                 stream_name, stream_class_id);
1306
1307         if (stream_id >= 0) {
1308                 g_string_append_printf(pretty->string,
1309                         "stream ID: %" PRIu64, stream_id);
1310         } else {
1311                 g_string_append(pretty->string, "no stream ID");
1312         }
1313
1314         g_string_append_printf(pretty->string, ").%s\n",
1315                 bt_common_color_reset());
1316
1317         /*
1318          * Print to standard error stream to remain backward compatible
1319          * with Babeltrace 1.
1320          */
1321         if (flush_buf(stderr, pretty)) {
1322                 ret = -1;
1323         }
1324
1325         return ret;
1326 }
1327
1328 BT_HIDDEN
1329 int pretty_print_discarded_items(struct pretty_component *pretty,
1330                 const bt_message *msg)
1331 {
1332         const bt_clock_snapshot *begin = NULL;
1333         const bt_clock_snapshot *end = NULL;
1334         const bt_stream *stream;
1335         const bt_stream_class *stream_class;
1336         uint64_t count = UINT64_C(-1);
1337         const char *elem_type;
1338
1339         switch (bt_message_get_type(msg)) {
1340         case BT_MESSAGE_TYPE_DISCARDED_EVENTS:
1341                 stream = bt_message_discarded_events_borrow_stream_const(msg);
1342
1343                 if (bt_message_discarded_events_get_count(msg, &count) ==
1344                                 BT_PROPERTY_AVAILABILITY_NOT_AVAILABLE) {
1345                         count = UINT64_C(-1);
1346                 }
1347
1348                 elem_type = "event";
1349                 break;
1350         case BT_MESSAGE_TYPE_DISCARDED_PACKETS:
1351                 stream = bt_message_discarded_packets_borrow_stream_const(msg);
1352
1353                 if (bt_message_discarded_packets_get_count(msg, &count) ==
1354                                 BT_PROPERTY_AVAILABILITY_NOT_AVAILABLE) {
1355                         count = UINT64_C(-1);
1356                 }
1357
1358                 elem_type = "packet";
1359                 break;
1360         default:
1361                 abort();
1362         }
1363
1364         BT_ASSERT(stream);
1365         stream_class = bt_stream_borrow_class_const(stream);
1366
1367         if (bt_stream_class_borrow_default_clock_class_const(stream_class)) {
1368                 switch (bt_message_get_type(msg)) {
1369                 case BT_MESSAGE_TYPE_DISCARDED_EVENTS:
1370                         bt_message_discarded_events_borrow_default_beginning_clock_snapshot_const(
1371                                 msg, &begin);
1372                         bt_message_discarded_events_borrow_default_end_clock_snapshot_const(
1373                                 msg, &end);
1374                         break;
1375                 case BT_MESSAGE_TYPE_DISCARDED_PACKETS:
1376                         bt_message_discarded_packets_borrow_default_beginning_clock_snapshot_const(
1377                                 msg, &begin);
1378                         bt_message_discarded_packets_borrow_default_end_clock_snapshot_const(
1379                                 msg, &end);
1380                         break;
1381                 default:
1382                         abort();
1383                 }
1384         }
1385
1386         print_discarded_elements_msg(pretty, stream, begin, end,
1387                 count, elem_type);
1388         return 0;
1389 }