src/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 <babeltrace2/babeltrace.h>
  27 #include "compat/bitfield.h"
  28 #include "common/common.h"
  29 #include "common/uuid.h"
  30 #include "compat/time.h"
  31 #include "common/assert.h"
  32 #include <inttypes.h>
  33 #include <ctype.h>
  34 #include <string.h>
  35 #include "pretty.h"
  36
  37 #define NSEC_PER_SEC 1000000000LL
  38
  39 #define COLOR_NAME              BT_COMMON_COLOR_BOLD
  40 #define COLOR_FIELD_NAME        BT_COMMON_COLOR_FG_CYAN
  41 #define COLOR_RST               BT_COMMON_COLOR_RESET
  42 #define COLOR_STRING_VALUE      BT_COMMON_COLOR_BOLD
  43 #define COLOR_NUMBER_VALUE      BT_COMMON_COLOR_BOLD
  44 #define COLOR_ENUM_MAPPING_NAME BT_COMMON_COLOR_BOLD
  45 #define COLOR_UNKNOWN           BT_COMMON_COLOR_BOLD BT_COMMON_COLOR_FG_RED
  46 #define COLOR_EVENT_NAME        BT_COMMON_COLOR_BOLD BT_COMMON_COLOR_FG_MAGENTA
  47 #define COLOR_TIMESTAMP         BT_COMMON_COLOR_BOLD BT_COMMON_COLOR_FG_YELLOW
  48
  49 struct timestamp {
  50         int64_t real_timestamp; /* Relative to UNIX epoch. */
  51         uint64_t clock_snapshot;        /* In cycles. */
  52 };
  53
  54 static
  55 int print_field(struct pretty_component *pretty,
  56                 const bt_field *field, bool print_names);
  57
  58 static
  59 void print_name_equal(struct pretty_component *pretty, const char *name)
  60 {
  61         if (pretty->use_colors) {
  62                 g_string_append(pretty->string, COLOR_NAME);
  63                 g_string_append(pretty->string, name);
  64                 g_string_append(pretty->string, COLOR_RST);
  65         } else {
  66                 g_string_append(pretty->string, name);
  67         }
  68         g_string_append(pretty->string, " = ");
  69 }
  70
  71 static
  72 void print_field_name_equal(struct pretty_component *pretty, const char *name)
  73 {
  74         if (pretty->use_colors) {
  75                 g_string_append(pretty->string, COLOR_FIELD_NAME);
  76                 g_string_append(pretty->string, name);
  77                 g_string_append(pretty->string, COLOR_RST);
  78         } else {
  79                 g_string_append(pretty->string, name);
  80 }
  81         g_string_append(pretty->string, " = ");
  82 }
  83
  84 static
  85 void print_timestamp_cycles(struct pretty_component *pretty,
  86                 const bt_clock_snapshot *clock_snapshot, bool update_last)
  87 {
  88         uint64_t cycles;
  89
  90         cycles = bt_clock_snapshot_get_value(clock_snapshot);
  91         bt_common_g_string_append_printf(pretty->string, "%020" PRIu64, cycles);
  92
  93         if (update_last) {
  94                 if (pretty->last_cycles_timestamp != -1ULL) {
  95                         pretty->delta_cycles = cycles - pretty->last_cycles_timestamp;
  96                 }
  97
  98                 pretty->last_cycles_timestamp = cycles;
  99         }
 100 }
 101
 102 static
 103 void print_timestamp_wall(struct pretty_component *pretty,
 104                 const bt_clock_snapshot *clock_snapshot, bool update_last)
 105 {
 106         int ret;
 107         int64_t ts_nsec = 0;    /* add configurable offset */
 108         int64_t ts_sec = 0;     /* add configurable offset */
 109         uint64_t ts_sec_abs, ts_nsec_abs;
 110         bool is_negative;
 111
 112         if (!clock_snapshot) {
 113                 g_string_append(pretty->string, "??:??:??.?????????");
 114                 return;
 115         }
 116
 117         ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, &ts_nsec);
 118         if (ret) {
 119                 // TODO: log, this is unexpected
 120                 g_string_append(pretty->string, "Error");
 121                 return;
 122         }
 123
 124         if (update_last) {
 125                 if (pretty->last_real_timestamp != -1ULL) {
 126                         pretty->delta_real_timestamp = ts_nsec - pretty->last_real_timestamp;
 127                 }
 128
 129                 pretty->last_real_timestamp = ts_nsec;
 130         }
 131
 132         ts_sec += ts_nsec / NSEC_PER_SEC;
 133         ts_nsec = ts_nsec % NSEC_PER_SEC;
 134
 135         if (ts_sec >= 0 && ts_nsec >= 0) {
 136                 is_negative = false;
 137                 ts_sec_abs = ts_sec;
 138                 ts_nsec_abs = ts_nsec;
 139         } else if (ts_sec > 0 && ts_nsec < 0) {
 140                 is_negative = false;
 141                 ts_sec_abs = ts_sec - 1;
 142                 ts_nsec_abs = NSEC_PER_SEC + ts_nsec;
 143         } else if (ts_sec == 0 && ts_nsec < 0) {
 144                 is_negative = true;
 145                 ts_sec_abs = ts_sec;
 146                 ts_nsec_abs = -ts_nsec;
 147         } else if (ts_sec < 0 && ts_nsec > 0) {
 148                 is_negative = true;
 149                 ts_sec_abs = -(ts_sec + 1);
 150                 ts_nsec_abs = NSEC_PER_SEC - ts_nsec;
 151         } else if (ts_sec < 0 && ts_nsec == 0) {
 152                 is_negative = true;
 153                 ts_sec_abs = -ts_sec;
 154                 ts_nsec_abs = ts_nsec;
 155         } else {        /* (ts_sec < 0 && ts_nsec < 0) */
 156                 is_negative = true;
 157                 ts_sec_abs = -ts_sec;
 158                 ts_nsec_abs = -ts_nsec;
 159         }
 160
 161         if (!pretty->options.clock_seconds) {
 162                 struct tm tm;
 163                 time_t time_s = (time_t) ts_sec_abs;
 164
 165                 if (is_negative && !pretty->negative_timestamp_warning_done) {
 166                         // TODO: log instead
 167                         fprintf(stderr, "[warning] Fallback to [sec.ns] to print negative time value. Use --clock-seconds.\n");
 168                         pretty->negative_timestamp_warning_done = true;
 169                         goto seconds;
 170                 }
 171
 172                 if (!pretty->options.clock_gmt) {
 173                         struct tm *res;
 174
 175                         res = bt_localtime_r(&time_s, &tm);
 176                         if (!res) {
 177                                 // TODO: log instead
 178                                 fprintf(stderr, "[warning] Unable to get localtime.\n");
 179                                 goto seconds;
 180                         }
 181                 } else {
 182                         struct tm *res;
 183
 184                         res = bt_gmtime_r(&time_s, &tm);
 185                         if (!res) {
 186                                 // TODO: log instead
 187                                 fprintf(stderr, "[warning] Unable to get gmtime.\n");
 188                                 goto seconds;
 189                         }
 190                 }
 191                 if (pretty->options.clock_date) {
 192                         char timestr[26];
 193                         size_t res;
 194
 195                         /* Print date and time */
 196                         res = strftime(timestr, sizeof(timestr),
 197                                         "%Y-%m-%d ", &tm);
 198                         if (!res) {
 199                                 // TODO: log instead
 200                                 fprintf(stderr, "[warning] Unable to print ascii time.\n");
 201                                 goto seconds;
 202                         }
 203
 204                         g_string_append(pretty->string, timestr);
 205                 }
 206
 207                 /* Print time in HH:MM:SS.ns */
 208                 bt_common_g_string_append_printf(pretty->string,
 209                         "%02d:%02d:%02d.%09" PRIu64, tm.tm_hour, tm.tm_min,
 210                         tm.tm_sec, ts_nsec_abs);
 211                 goto end;
 212         }
 213 seconds:
 214         bt_common_g_string_append_printf(pretty->string, "%s%" PRId64 ".%09" PRIu64,
 215                 is_negative ? "-" : "", ts_sec_abs, ts_nsec_abs);
 216 end:
 217         return;
 218 }
 219
 220 static
 221 int print_event_timestamp(struct pretty_component *pretty,
 222                 const bt_message *event_msg, bool *start_line)
 223 {
 224         bool print_names = pretty->options.print_header_field_names;
 225         int ret = 0;
 226         const bt_clock_snapshot *clock_snapshot = NULL;
 227
 228         if (!bt_message_event_borrow_stream_class_default_clock_class_const(
 229                         event_msg)) {
 230                 /* No default clock class: skip the timestamp without an error */
 231                 goto end;
 232         }
 233
 234         clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const(event_msg);
 235
 236         if (print_names) {
 237                 print_name_equal(pretty, "timestamp");
 238         } else {
 239                 g_string_append(pretty->string, "[");
 240         }
 241         if (pretty->use_colors) {
 242                 g_string_append(pretty->string, COLOR_TIMESTAMP);
 243         }
 244         if (pretty->options.print_timestamp_cycles) {
 245                 print_timestamp_cycles(pretty, clock_snapshot, true);
 246         } else {
 247                 print_timestamp_wall(pretty, clock_snapshot, true);
 248         }
 249         if (pretty->use_colors) {
 250                 g_string_append(pretty->string, COLOR_RST);
 251         }
 252
 253         if (!print_names)
 254                 g_string_append(pretty->string, "] ");
 255
 256         if (pretty->options.print_delta_field) {
 257                 if (print_names) {
 258                         g_string_append(pretty->string, ", ");
 259                         print_name_equal(pretty, "delta");
 260                 } else {
 261                         g_string_append(pretty->string, "(");
 262                 }
 263                 if (pretty->options.print_timestamp_cycles) {
 264                         if (pretty->delta_cycles == -1ULL) {
 265                                 g_string_append(pretty->string,
 266                                         "+??????????\?\?"); /* Not a trigraph. */
 267                         } else {
 268                                 bt_common_g_string_append_printf(pretty->string,
 269                                         "+%012" PRIu64, pretty->delta_cycles);
 270                         }
 271                 } else {
 272                         if (pretty->delta_real_timestamp != -1ULL) {
 273                                 uint64_t delta_sec, delta_nsec, delta;
 274
 275                                 delta = pretty->delta_real_timestamp;
 276                                 delta_sec = delta / NSEC_PER_SEC;
 277                                 delta_nsec = delta % NSEC_PER_SEC;
 278                                 bt_common_g_string_append_printf(pretty->string,
 279                                         "+%" PRIu64 ".%09" PRIu64,
 280                                         delta_sec, delta_nsec);
 281                         } else {
 282                                 g_string_append(pretty->string, "+?.?????????");
 283                         }
 284                 }
 285                 if (!print_names) {
 286                         g_string_append(pretty->string, ") ");
 287                 }
 288         }
 289         *start_line = !print_names;
 290
 291 end:
 292         return ret;
 293 }
 294
 295 static
 296 int print_event_header(struct pretty_component *pretty,
 297                 const bt_message *event_msg)
 298 {
 299         bool print_names = pretty->options.print_header_field_names;
 300         int ret = 0;
 301         const bt_event_class *event_class = NULL;
 302         const bt_stream *stream = NULL;
 303         const bt_trace *trace = NULL;
 304         const bt_event *event = bt_message_event_borrow_event_const(event_msg);
 305         const char *ev_name;
 306         int dom_print = 0;
 307         bt_property_availability prop_avail;
 308
 309         event_class = bt_event_borrow_class_const(event);
 310         stream = bt_event_borrow_stream_const(event);
 311         trace = bt_stream_borrow_trace_const(stream);
 312         ret = print_event_timestamp(pretty, event_msg, &pretty->start_line);
 313         if (ret) {
 314                 goto end;
 315         }
 316         if (pretty->options.print_trace_field) {
 317                 const char *name;
 318
 319                 name = bt_trace_get_name(trace);
 320                 if (name) {
 321                         if (!pretty->start_line) {
 322                                 g_string_append(pretty->string, ", ");
 323                         }
 324                         if (print_names) {
 325                                 print_name_equal(pretty, "trace");
 326                         }
 327
 328                         g_string_append(pretty->string, name);
 329
 330                         if (print_names) {
 331                                 g_string_append(pretty->string, ", ");
 332                         }
 333                 }
 334         }
 335         if (pretty->options.print_trace_hostname_field) {
 336                 const bt_value *hostname_str;
 337
 338                 hostname_str = bt_trace_borrow_environment_entry_value_by_name_const(
 339                         trace, "hostname");
 340                 if (hostname_str) {
 341                         const char *str;
 342
 343                         if (!pretty->start_line) {
 344                                 g_string_append(pretty->string, ", ");
 345                         }
 346                         if (print_names) {
 347                                 print_name_equal(pretty, "trace:hostname");
 348                         }
 349                         str = bt_value_string_get(hostname_str);
 350                         g_string_append(pretty->string, str);
 351                         dom_print = 1;
 352                 }
 353         }
 354         if (pretty->options.print_trace_domain_field) {
 355                 const bt_value *domain_str;
 356
 357                 domain_str = bt_trace_borrow_environment_entry_value_by_name_const(
 358                         trace, "domain");
 359                 if (domain_str) {
 360                         const char *str;
 361
 362                         if (!pretty->start_line) {
 363                                 g_string_append(pretty->string, ", ");
 364                         }
 365                         if (print_names) {
 366                                 print_name_equal(pretty, "trace:domain");
 367                         } else if (dom_print) {
 368                                 g_string_append(pretty->string, ":");
 369                         }
 370                         str = bt_value_string_get(domain_str);
 371                         g_string_append(pretty->string, str);
 372                         dom_print = 1;
 373                 }
 374         }
 375         if (pretty->options.print_trace_procname_field) {
 376                 const bt_value *procname_str;
 377
 378                 procname_str = bt_trace_borrow_environment_entry_value_by_name_const(
 379                         trace, "procname");
 380                 if (procname_str) {
 381                         const char *str;
 382
 383                         if (!pretty->start_line) {
 384                                 g_string_append(pretty->string, ", ");
 385                         }
 386                         if (print_names) {
 387                                 print_name_equal(pretty, "trace:procname");
 388                         } else if (dom_print) {
 389                                 g_string_append(pretty->string, ":");
 390                         }
 391                         str = bt_value_string_get(procname_str);
 392                         g_string_append(pretty->string, str);
 393                         dom_print = 1;
 394                 }
 395         }
 396         if (pretty->options.print_trace_vpid_field) {
 397                 const bt_value *vpid_value;
 398
 399                 vpid_value = bt_trace_borrow_environment_entry_value_by_name_const(
 400                         trace, "vpid");
 401                 if (vpid_value) {
 402                         int64_t value;
 403
 404                         if (!pretty->start_line) {
 405                                 g_string_append(pretty->string, ", ");
 406                         }
 407                         if (print_names) {
 408                                 print_name_equal(pretty, "trace:vpid");
 409                         } else if (dom_print) {
 410                                 g_string_append(pretty->string, ":");
 411                         }
 412                         value = bt_value_integer_signed_get(vpid_value);
 413                         bt_common_g_string_append_printf(pretty->string,
 414                                 "(%" PRId64 ")", value);
 415                         dom_print = 1;
 416                 }
 417         }
 418         if (pretty->options.print_loglevel_field) {
 419                 static const char *log_level_names[] = {
 420                         [ BT_EVENT_CLASS_LOG_LEVEL_EMERGENCY ] = "TRACE_EMERG",
 421                         [ BT_EVENT_CLASS_LOG_LEVEL_ALERT ] = "TRACE_ALERT",
 422                         [ BT_EVENT_CLASS_LOG_LEVEL_CRITICAL ] = "TRACE_CRIT",
 423                         [ BT_EVENT_CLASS_LOG_LEVEL_ERROR ] = "TRACE_ERR",
 424                         [ BT_EVENT_CLASS_LOG_LEVEL_WARNING ] = "TRACE_WARNING",
 425                         [ BT_EVENT_CLASS_LOG_LEVEL_NOTICE ] = "TRACE_NOTICE",
 426                         [ BT_EVENT_CLASS_LOG_LEVEL_INFO ] = "TRACE_INFO",
 427                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_SYSTEM ] = "TRACE_DEBUG_SYSTEM",
 428                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_PROGRAM ] = "TRACE_DEBUG_PROGRAM",
 429                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_PROCESS ] = "TRACE_DEBUG_PROCESS",
 430                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_MODULE ] = "TRACE_DEBUG_MODULE",
 431                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_UNIT ] = "TRACE_DEBUG_UNIT",
 432                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_FUNCTION ] = "TRACE_DEBUG_FUNCTION",
 433                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG_LINE ] = "TRACE_DEBUG_LINE",
 434                         [ BT_EVENT_CLASS_LOG_LEVEL_DEBUG ] = "TRACE_DEBUG",
 435                 };
 436                 bt_event_class_log_level log_level;
 437                 const char *log_level_str = NULL;
 438
 439                 prop_avail = bt_event_class_get_log_level(event_class,
 440                         &log_level);
 441                 if (prop_avail == BT_PROPERTY_AVAILABILITY_AVAILABLE) {
 442                         log_level_str = log_level_names[log_level];
 443                         BT_ASSERT(log_level_str);
 444
 445                         if (!pretty->start_line) {
 446                                 g_string_append(pretty->string, ", ");
 447                         }
 448                         if (print_names) {
 449                                 print_name_equal(pretty, "loglevel");
 450                         } else if (dom_print) {
 451                                 g_string_append(pretty->string, ":");
 452                         }
 453
 454                         g_string_append(pretty->string, log_level_str);
 455                         bt_common_g_string_append_printf(
 456                                 pretty->string, " (%d)", (int) log_level);
 457                         dom_print = 1;
 458                 }
 459         }
 460         if (pretty->options.print_emf_field) {
 461                 const char *uri_str;
 462
 463                 uri_str = bt_event_class_get_emf_uri(event_class);
 464                 if (uri_str) {
 465                         if (!pretty->start_line) {
 466                                 g_string_append(pretty->string, ", ");
 467                         }
 468                         if (print_names) {
 469                                 print_name_equal(pretty, "model.emf.uri");
 470                         } else if (dom_print) {
 471                                 g_string_append(pretty->string, ":");
 472                         }
 473
 474                         g_string_append(pretty->string, uri_str);
 475                         dom_print = 1;
 476                 }
 477         }
 478         if (dom_print && !print_names) {
 479                 g_string_append(pretty->string, " ");
 480         }
 481         if (!pretty->start_line) {
 482                 g_string_append(pretty->string, ", ");
 483         }
 484         pretty->start_line = true;
 485         if (print_names) {
 486                 print_name_equal(pretty, "name");
 487         }
 488         ev_name = bt_event_class_get_name(event_class);
 489         if (pretty->use_colors) {
 490                 if (ev_name) {
 491                         g_string_append(pretty->string, COLOR_EVENT_NAME);
 492                 } else {
 493                         g_string_append(pretty->string, COLOR_UNKNOWN);
 494                 }
 495         }
 496         if (ev_name) {
 497                 g_string_append(pretty->string, ev_name);
 498         } else {
 499                 g_string_append(pretty->string, "<unknown>");
 500         }
 501         if (pretty->use_colors) {
 502                 g_string_append(pretty->string, COLOR_RST);
 503         }
 504         if (!print_names) {
 505                 g_string_append(pretty->string, ": ");
 506         } else {
 507                 g_string_append(pretty->string, ", ");
 508         }
 509
 510 end:
 511         return ret;
 512 }
 513
 514 static
 515 int print_integer(struct pretty_component *pretty,
 516                 const bt_field *field)
 517 {
 518         int ret = 0;
 519         bt_field_class_integer_preferred_display_base base;
 520         const bt_field_class *int_fc;
 521         union {
 522                 uint64_t u;
 523                 int64_t s;
 524         } v;
 525         bool rst_color = false;
 526         bt_field_class_type ft_type;
 527
 528         int_fc = bt_field_borrow_class_const(field);
 529         BT_ASSERT(int_fc);
 530         ft_type = bt_field_get_class_type(field);
 531         if (ft_type == BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER ||
 532                         ft_type == BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION) {
 533                 v.u = bt_field_integer_unsigned_get_value(field);
 534         } else {
 535                 v.s = bt_field_integer_signed_get_value(field);
 536         }
 537
 538         if (pretty->use_colors) {
 539                 g_string_append(pretty->string, COLOR_NUMBER_VALUE);
 540                 rst_color = true;
 541         }
 542
 543         base = bt_field_class_integer_get_preferred_display_base(int_fc);
 544         switch (base) {
 545         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_BINARY:
 546         {
 547                 int bitnr, len;
 548
 549                 len = bt_field_class_integer_get_field_value_range(int_fc);
 550                 g_string_append(pretty->string, "0b");
 551                 _bt_safe_lshift(v.u, 64 - len);
 552                 for (bitnr = 0; bitnr < len; bitnr++) {
 553                         bt_common_g_string_append_printf(pretty->string, "%u", (v.u & (1ULL << 63)) ? 1 : 0);
 554                         _bt_safe_lshift(v.u, 1);
 555                 }
 556                 break;
 557         }
 558         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_OCTAL:
 559         {
 560                 if (ft_type == BT_FIELD_CLASS_TYPE_SIGNED_INTEGER ||
 561                                 ft_type == BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION) {
 562                         int len;
 563
 564                         len = bt_field_class_integer_get_field_value_range(
 565                                 int_fc);
 566                         if (len < 64) {
 567                                 size_t rounded_len;
 568
 569                                 BT_ASSERT(len != 0);
 570                                 /* Round length to the nearest 3-bit */
 571                                 rounded_len = (((len - 1) / 3) + 1) * 3;
 572                                 v.u &= ((uint64_t) 1 << rounded_len) - 1;
 573                         }
 574                 }
 575
 576                 bt_common_g_string_append_printf(pretty->string, "0%" PRIo64, v.u);
 577                 break;
 578         }
 579         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_DECIMAL:
 580                 if (ft_type == BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER ||
 581                                 ft_type == BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION) {
 582                         bt_common_g_string_append_printf(pretty->string, "%" PRIu64, v.u);
 583                 } else {
 584                         bt_common_g_string_append_printf(pretty->string, "%" PRId64, v.s);
 585                 }
 586                 break;
 587         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_HEXADECIMAL:
 588         {
 589                 int len;
 590
 591                 len = bt_field_class_integer_get_field_value_range(int_fc);
 592                 if (len < 64) {
 593                         /* Round length to the nearest nibble */
 594                         uint8_t rounded_len = ((len + 3) & ~0x3);
 595
 596                         v.u &= ((uint64_t) 1 << rounded_len) - 1;
 597                 }
 598
 599                 bt_common_g_string_append_printf(pretty->string, "0x%" PRIX64, v.u);
 600                 break;
 601         }
 602         default:
 603                 ret = -1;
 604                 goto end;
 605         }
 606 end:
 607         if (rst_color) {
 608                 g_string_append(pretty->string, COLOR_RST);
 609         }
 610         return ret;
 611 }
 612
 613 static
 614 void print_escape_string(struct pretty_component *pretty, const char *str)
 615 {
 616         int i;
 617
 618         g_string_append_c(pretty->string, '"');
 619
 620         for (i = 0; i < strlen(str); i++) {
 621                 /* Escape sequences not recognized by iscntrl(). */
 622                 switch (str[i]) {
 623                 case '\\':
 624                         g_string_append(pretty->string, "\\\\");
 625                         continue;
 626                 case '\'':
 627                         g_string_append(pretty->string, "\\\'");
 628                         continue;
 629                 case '\"':
 630                         g_string_append(pretty->string, "\\\"");
 631                         continue;
 632                 case '\?':
 633                         g_string_append(pretty->string, "\\\?");
 634                         continue;
 635                 }
 636
 637                 /* Standard characters. */
 638                 if (!iscntrl(str[i])) {
 639                         g_string_append_c(pretty->string, str[i]);
 640                         continue;
 641                 }
 642
 643                 switch (str[i]) {
 644                 case '\0':
 645                         g_string_append(pretty->string, "\\0");
 646                         break;
 647                 case '\a':
 648                         g_string_append(pretty->string, "\\a");
 649                         break;
 650                 case '\b':
 651                         g_string_append(pretty->string, "\\b");
 652                         break;
 653                 case '\e':
 654                         g_string_append(pretty->string, "\\e");
 655                         break;
 656                 case '\f':
 657                         g_string_append(pretty->string, "\\f");
 658                         break;
 659                 case '\n':
 660                         g_string_append(pretty->string, "\\n");
 661                         break;
 662                 case '\r':
 663                         g_string_append(pretty->string, "\\r");
 664                         break;
 665                 case '\t':
 666                         g_string_append(pretty->string, "\\t");
 667                         break;
 668                 case '\v':
 669                         g_string_append(pretty->string, "\\v");
 670                         break;
 671                 default:
 672                         /* Unhandled control-sequence, print as hex. */
 673                         bt_common_g_string_append_printf(pretty->string, "\\x%02x", str[i]);
 674                         break;
 675                 }
 676         }
 677
 678         g_string_append_c(pretty->string, '"');
 679 }
 680
 681 static
 682 int print_enum(struct pretty_component *pretty,
 683                 const bt_field *field)
 684 {
 685         int ret = 0;
 686         const bt_field_class *enumeration_field_class = NULL;
 687         bt_field_class_enumeration_mapping_label_array label_array;
 688         uint64_t label_count;
 689         uint64_t i;
 690
 691         enumeration_field_class = bt_field_borrow_class_const(field);
 692         if (!enumeration_field_class) {
 693                 ret = -1;
 694                 goto end;
 695         }
 696
 697         switch (bt_field_get_class_type(field)) {
 698         case BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION:
 699                 ret = bt_field_enumeration_unsigned_get_mapping_labels(field,
 700                         &label_array, &label_count);
 701                 break;
 702         case BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION:
 703                 ret = bt_field_enumeration_signed_get_mapping_labels(field,
 704                         &label_array, &label_count);
 705                 break;
 706         default:
 707                 abort();
 708         }
 709
 710         if (ret) {
 711                 ret = -1;
 712                 goto end;
 713         }
 714
 715         g_string_append(pretty->string, "( ");
 716         if (label_count == 0) {
 717                 if (pretty->use_colors) {
 718                         g_string_append(pretty->string, COLOR_UNKNOWN);
 719                 }
 720                 g_string_append(pretty->string, "<unknown>");
 721                 if (pretty->use_colors) {
 722                         g_string_append(pretty->string, COLOR_RST);
 723                 }
 724                 goto skip_loop;
 725         }
 726         for (i = 0; i < label_count; i++) {
 727                 const char *mapping_name = label_array[i];
 728
 729                 if (i != 0) {
 730                         g_string_append(pretty->string, ", ");
 731                 }
 732                 if (pretty->use_colors) {
 733                         g_string_append(pretty->string, COLOR_ENUM_MAPPING_NAME);
 734                 }
 735                 print_escape_string(pretty, mapping_name);
 736                 if (pretty->use_colors) {
 737                         g_string_append(pretty->string, COLOR_RST);
 738                 }
 739         }
 740 skip_loop:
 741         g_string_append(pretty->string, " : container = ");
 742         ret = print_integer(pretty, field);
 743         if (ret != 0) {
 744                 goto end;
 745         }
 746         g_string_append(pretty->string, " )");
 747 end:
 748         return ret;
 749 }
 750
 751 static
 752 int print_struct_field(struct pretty_component *pretty,
 753                 const bt_field *_struct,
 754                 const bt_field_class *struct_class,
 755                 uint64_t i, bool print_names, uint64_t *nr_printed_fields)
 756 {
 757         int ret = 0;
 758         const char *field_name;
 759         const bt_field *field = NULL;
 760         const bt_field_class_structure_member *member;
 761
 762         field = bt_field_structure_borrow_member_field_by_index_const(_struct, i);
 763         if (!field) {
 764                 ret = -1;
 765                 goto end;
 766         }
 767
 768         member = bt_field_class_structure_borrow_member_by_index_const(
 769                 struct_class, i);
 770         field_name = bt_field_class_structure_member_get_name(member);
 771
 772         if (*nr_printed_fields > 0) {
 773                 g_string_append(pretty->string, ", ");
 774         } else {
 775                 g_string_append(pretty->string, " ");
 776         }
 777         if (print_names) {
 778                 print_field_name_equal(pretty, field_name);
 779         }
 780         ret = print_field(pretty, field, print_names);
 781         *nr_printed_fields += 1;
 782
 783 end:
 784         return ret;
 785 }
 786
 787 static
 788 int print_struct(struct pretty_component *pretty,
 789                 const bt_field *_struct, bool print_names)
 790 {
 791         int ret = 0;
 792         const bt_field_class *struct_class = NULL;
 793         uint64_t nr_fields, i, nr_printed_fields;
 794
 795         struct_class = bt_field_borrow_class_const(_struct);
 796         if (!struct_class) {
 797                 ret = -1;
 798                 goto end;
 799         }
 800
 801         nr_fields = bt_field_class_structure_get_member_count(struct_class);
 802
 803         g_string_append(pretty->string, "{");
 804         pretty->depth++;
 805         nr_printed_fields = 0;
 806         for (i = 0; i < nr_fields; i++) {
 807                 ret = print_struct_field(pretty, _struct, struct_class, i,
 808                                 print_names, &nr_printed_fields);
 809                 if (ret != 0) {
 810                         goto end;
 811                 }
 812         }
 813         pretty->depth--;
 814         g_string_append(pretty->string, " }");
 815
 816 end:
 817         return ret;
 818 }
 819
 820 static
 821 int print_array_field(struct pretty_component *pretty,
 822                 const bt_field *array, uint64_t i, bool print_names)
 823 {
 824         const bt_field *field = NULL;
 825
 826         if (i != 0) {
 827                 g_string_append(pretty->string, ", ");
 828         } else {
 829                 g_string_append(pretty->string, " ");
 830         }
 831         if (print_names) {
 832                 bt_common_g_string_append_printf(pretty->string, "[%" PRIu64 "] = ", i);
 833         }
 834
 835         field = bt_field_array_borrow_element_field_by_index_const(array, i);
 836         BT_ASSERT(field);
 837         return print_field(pretty, field, print_names);
 838 }
 839
 840 static
 841 int print_array(struct pretty_component *pretty,
 842                 const bt_field *array, bool print_names)
 843 {
 844         int ret = 0;
 845         const bt_field_class *array_class = NULL;
 846         uint64_t len;
 847         uint64_t i;
 848
 849         array_class = bt_field_borrow_class_const(array);
 850         if (!array_class) {
 851                 ret = -1;
 852                 goto end;
 853         }
 854         len = bt_field_array_get_length(array);
 855         g_string_append(pretty->string, "[");
 856         pretty->depth++;
 857         for (i = 0; i < len; i++) {
 858                 ret = print_array_field(pretty, array, i, print_names);
 859                 if (ret != 0) {
 860                         goto end;
 861                 }
 862         }
 863         pretty->depth--;
 864         g_string_append(pretty->string, " ]");
 865
 866 end:
 867         return ret;
 868 }
 869
 870 static
 871 int print_sequence_field(struct pretty_component *pretty,
 872                 const bt_field *seq, uint64_t i, bool print_names)
 873 {
 874         const bt_field *field = NULL;
 875
 876         if (i != 0) {
 877                 g_string_append(pretty->string, ", ");
 878         } else {
 879                 g_string_append(pretty->string, " ");
 880         }
 881         if (print_names) {
 882                 bt_common_g_string_append_printf(pretty->string, "[%" PRIu64 "] = ", i);
 883         }
 884
 885         field = bt_field_array_borrow_element_field_by_index_const(seq, i);
 886         BT_ASSERT(field);
 887         return print_field(pretty, field, print_names);
 888 }
 889
 890 static
 891 int print_sequence(struct pretty_component *pretty,
 892                 const bt_field *seq, bool print_names)
 893 {
 894         int ret = 0;
 895         uint64_t len;
 896         uint64_t i;
 897
 898         len = bt_field_array_get_length(seq);
 899         g_string_append(pretty->string, "[");
 900
 901         pretty->depth++;
 902         for (i = 0; i < len; i++) {
 903                 ret = print_sequence_field(pretty, seq, i, print_names);
 904                 if (ret != 0) {
 905                         goto end;
 906                 }
 907         }
 908         pretty->depth--;
 909         g_string_append(pretty->string, " ]");
 910
 911 end:
 912         return ret;
 913 }
 914
 915 static
 916 int print_variant(struct pretty_component *pretty,
 917                 const bt_field *variant, bool print_names)
 918 {
 919         int ret = 0;
 920         const bt_field *field = NULL;
 921
 922         field = bt_field_variant_borrow_selected_option_field_const(variant);
 923         BT_ASSERT(field);
 924         g_string_append(pretty->string, "{ ");
 925         pretty->depth++;
 926         if (print_names) {
 927                 // TODO: find tag's name using field path
 928                 // print_field_name_equal(pretty, tag_choice);
 929         }
 930         ret = print_field(pretty, field, print_names);
 931         if (ret != 0) {
 932                 goto end;
 933         }
 934         pretty->depth--;
 935         g_string_append(pretty->string, " }");
 936
 937 end:
 938         return ret;
 939 }
 940
 941 static
 942 int print_field(struct pretty_component *pretty,
 943                 const bt_field *field, bool print_names)
 944 {
 945         bt_field_class_type class_id;
 946
 947         class_id = bt_field_get_class_type(field);
 948         switch (class_id) {
 949         case BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER:
 950         case BT_FIELD_CLASS_TYPE_SIGNED_INTEGER:
 951                 return print_integer(pretty, field);
 952         case BT_FIELD_CLASS_TYPE_REAL:
 953         {
 954                 double v;
 955
 956                 v = bt_field_real_get_value(field);
 957                 if (pretty->use_colors) {
 958                         g_string_append(pretty->string, COLOR_NUMBER_VALUE);
 959                 }
 960                 bt_common_g_string_append_printf(pretty->string, "%g", v);
 961                 if (pretty->use_colors) {
 962                         g_string_append(pretty->string, COLOR_RST);
 963                 }
 964                 return 0;
 965         }
 966         case BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION:
 967         case BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION:
 968                 return print_enum(pretty, field);
 969         case BT_FIELD_CLASS_TYPE_STRING:
 970         {
 971                 const char *str;
 972
 973                 str = bt_field_string_get_value(field);
 974                 if (!str) {
 975                         return -1;
 976                 }
 977
 978                 if (pretty->use_colors) {
 979                         g_string_append(pretty->string, COLOR_STRING_VALUE);
 980                 }
 981                 print_escape_string(pretty, str);
 982                 if (pretty->use_colors) {
 983                         g_string_append(pretty->string, COLOR_RST);
 984                 }
 985                 return 0;
 986         }
 987         case BT_FIELD_CLASS_TYPE_STRUCTURE:
 988                 return print_struct(pretty, field, print_names);
 989         case BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR:
 990         case BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR:
 991         case BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR:
 992                 return print_variant(pretty, field, print_names);
 993         case BT_FIELD_CLASS_TYPE_STATIC_ARRAY:
 994                 return print_array(pretty, field, print_names);
 995         case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY:
 996                 return print_sequence(pretty, field, print_names);
 997         default:
 998                 // TODO: log instead
 999                 fprintf(pretty->err, "[error] Unknown type id: %d\n", (int) class_id);
1000                 return -1;
1001         }
1002 }
1003
1004 static
1005 int print_stream_packet_context(struct pretty_component *pretty,
1006                 const bt_event *event)
1007 {
1008         int ret = 0;
1009         const bt_packet *packet = NULL;
1010         const bt_field *main_field = NULL;
1011
1012         packet = bt_event_borrow_packet_const(event);
1013         if (!packet) {
1014                 goto end;
1015         }
1016         main_field = bt_packet_borrow_context_field_const(packet);
1017         if (!main_field) {
1018                 goto end;
1019         }
1020         if (!pretty->start_line) {
1021                 g_string_append(pretty->string, ", ");
1022         }
1023         pretty->start_line = false;
1024         if (pretty->options.print_scope_field_names) {
1025                 print_name_equal(pretty, "stream.packet.context");
1026         }
1027         ret = print_field(pretty, main_field,
1028                         pretty->options.print_context_field_names);
1029
1030 end:
1031         return ret;
1032 }
1033
1034 static
1035 int print_stream_event_context(struct pretty_component *pretty,
1036                 const bt_event *event)
1037 {
1038         int ret = 0;
1039         const bt_field *main_field = NULL;
1040
1041         main_field = bt_event_borrow_common_context_field_const(event);
1042         if (!main_field) {
1043                 goto end;
1044         }
1045         if (!pretty->start_line) {
1046                 g_string_append(pretty->string, ", ");
1047         }
1048         pretty->start_line = false;
1049         if (pretty->options.print_scope_field_names) {
1050                 print_name_equal(pretty, "stream.event.context");
1051         }
1052         ret = print_field(pretty, main_field,
1053                         pretty->options.print_context_field_names);
1054
1055 end:
1056         return ret;
1057 }
1058
1059 static
1060 int print_event_context(struct pretty_component *pretty,
1061                 const bt_event *event)
1062 {
1063         int ret = 0;
1064         const bt_field *main_field = NULL;
1065
1066         main_field = bt_event_borrow_specific_context_field_const(event);
1067         if (!main_field) {
1068                 goto end;
1069         }
1070         if (!pretty->start_line) {
1071                 g_string_append(pretty->string, ", ");
1072         }
1073         pretty->start_line = false;
1074         if (pretty->options.print_scope_field_names) {
1075                 print_name_equal(pretty, "event.context");
1076         }
1077         ret = print_field(pretty, main_field,
1078                         pretty->options.print_context_field_names);
1079
1080 end:
1081         return ret;
1082 }
1083
1084 static
1085 int print_event_payload(struct pretty_component *pretty,
1086                 const bt_event *event)
1087 {
1088         int ret = 0;
1089         const bt_field *main_field = NULL;
1090
1091         main_field = bt_event_borrow_payload_field_const(event);
1092         if (!main_field) {
1093                 goto end;
1094         }
1095         if (!pretty->start_line) {
1096                 g_string_append(pretty->string, ", ");
1097         }
1098         pretty->start_line = false;
1099         if (pretty->options.print_scope_field_names) {
1100                 print_name_equal(pretty, "event.fields");
1101         }
1102         ret = print_field(pretty, main_field,
1103                         pretty->options.print_payload_field_names);
1104
1105 end:
1106         return ret;
1107 }
1108
1109 static
1110 int flush_buf(FILE *stream, struct pretty_component *pretty)
1111 {
1112         int ret = 0;
1113
1114         if (pretty->string->len == 0) {
1115                 goto end;
1116         }
1117
1118         if (fwrite(pretty->string->str, pretty->string->len, 1, stream) != 1) {
1119                 ret = -1;
1120         }
1121
1122 end:
1123         return ret;
1124 }
1125
1126 BT_HIDDEN
1127 int pretty_print_event(struct pretty_component *pretty,
1128                 const bt_message *event_msg)
1129 {
1130         int ret;
1131         const bt_event *event =
1132                 bt_message_event_borrow_event_const(event_msg);
1133
1134         BT_ASSERT(event);
1135         pretty->start_line = true;
1136         g_string_assign(pretty->string, "");
1137         ret = print_event_header(pretty, event_msg);
1138         if (ret != 0) {
1139                 goto end;
1140         }
1141
1142         ret = print_stream_packet_context(pretty, event);
1143         if (ret != 0) {
1144                 goto end;
1145         }
1146
1147         ret = print_stream_event_context(pretty, event);
1148         if (ret != 0) {
1149                 goto end;
1150         }
1151
1152         ret = print_event_context(pretty, event);
1153         if (ret != 0) {
1154                 goto end;
1155         }
1156
1157         ret = print_event_payload(pretty, event);
1158         if (ret != 0) {
1159                 goto end;
1160         }
1161
1162         g_string_append_c(pretty->string, '\n');
1163         if (flush_buf(pretty->out, pretty)) {
1164                 ret = -1;
1165                 goto end;
1166         }
1167
1168 end:
1169         return ret;
1170 }
1171
1172 static
1173 int print_discarded_elements_msg(struct pretty_component *pretty,
1174                 const bt_stream *stream,
1175                 const bt_clock_snapshot *begin_clock_snapshot,
1176                 const bt_clock_snapshot *end_clock_snapshot,
1177                 uint64_t count, const char *elem_type)
1178 {
1179         int ret = 0;
1180         const bt_stream_class *stream_class = NULL;
1181         const bt_trace *trace = NULL;
1182         const char *stream_name;
1183         const char *trace_name;
1184         bt_uuid trace_uuid;
1185         int64_t stream_class_id;
1186         int64_t stream_id;
1187         const char *init_msg;
1188
1189         /* Stream name */
1190         stream_name = bt_stream_get_name(stream);
1191         if (!stream_name) {
1192                 stream_name = "(unknown)";
1193         }
1194
1195         /* Stream class ID */
1196         stream_class = bt_stream_borrow_class_const(stream);
1197         BT_ASSERT(stream_class);
1198         stream_class_id = bt_stream_class_get_id(stream_class);
1199
1200         /* Stream ID */
1201         stream_id = bt_stream_get_id(stream);
1202
1203         /* Trace name */
1204         trace = bt_stream_borrow_trace_const(stream);
1205         BT_ASSERT(trace);
1206         trace_name = bt_trace_get_name(trace);
1207         if (!trace_name) {
1208                 trace_name = "(unknown)";
1209         }
1210
1211         /* Trace UUID */
1212         trace_uuid = bt_trace_get_uuid(trace);
1213
1214         /* Format message */
1215         g_string_assign(pretty->string, "");
1216
1217         if (count == UINT64_C(-1)) {
1218                 init_msg = "Tracer may have discarded";
1219         } else {
1220                 init_msg = "Tracer discarded";
1221         }
1222
1223         bt_common_g_string_append_printf(pretty->string,
1224                 "%s%sWARNING%s%s: %s ",
1225                 bt_common_color_fg_yellow(),
1226                 bt_common_color_bold(),
1227                 bt_common_color_reset(),
1228                 bt_common_color_fg_yellow(), init_msg);
1229
1230         if (count == UINT64_C(-1)) {
1231                 bt_common_g_string_append_printf(pretty->string, "%ss", elem_type);
1232         } else {
1233                 bt_common_g_string_append_printf(pretty->string,
1234                         "%" PRIu64 " %s%s", count, elem_type,
1235                         count == 1 ? "" : "s");
1236         }
1237
1238         g_string_append_c(pretty->string, ' ');
1239
1240         if (begin_clock_snapshot && end_clock_snapshot) {
1241                 g_string_append(pretty->string, "between [");
1242                 print_timestamp_wall(pretty, begin_clock_snapshot, false);
1243                 g_string_append(pretty->string, "] and [");
1244                 print_timestamp_wall(pretty, end_clock_snapshot, false);
1245                 g_string_append(pretty->string, "]");
1246         } else {
1247                 g_string_append(pretty->string, "(unknown time range)");
1248         }
1249
1250         bt_common_g_string_append_printf(pretty->string, " in trace \"%s\" ", trace_name);
1251
1252         if (trace_uuid) {
1253                 bt_common_g_string_append_printf(pretty->string,
1254                         "(UUID: " BT_UUID_FMT ") ",
1255                         BT_UUID_FMT_VALUES(trace_uuid));
1256         } else {
1257                 g_string_append(pretty->string, "(no UUID) ");
1258         }
1259
1260         bt_common_g_string_append_printf(pretty->string,
1261                 "within stream \"%s\" (stream class ID: %" PRIu64 ", ",
1262                 stream_name, stream_class_id);
1263
1264         if (stream_id >= 0) {
1265                 bt_common_g_string_append_printf(pretty->string,
1266                         "stream ID: %" PRIu64, stream_id);
1267         } else {
1268                 g_string_append(pretty->string, "no stream ID");
1269         }
1270
1271         bt_common_g_string_append_printf(pretty->string, ").%s\n",
1272                 bt_common_color_reset());
1273
1274         /*
1275          * Print to standard error stream to remain backward compatible
1276          * with Babeltrace 1.
1277          */
1278         if (flush_buf(stderr, pretty)) {
1279                 ret = -1;
1280         }
1281
1282         return ret;
1283 }
1284
1285 BT_HIDDEN
1286 int pretty_print_discarded_items(struct pretty_component *pretty,
1287                 const bt_message *msg)
1288 {
1289         const bt_clock_snapshot *begin = NULL;
1290         const bt_clock_snapshot *end = NULL;
1291         const bt_stream *stream;
1292         const bt_stream_class *stream_class;
1293         uint64_t count = UINT64_C(-1);
1294         const char *elem_type;
1295
1296         switch (bt_message_get_type(msg)) {
1297         case BT_MESSAGE_TYPE_DISCARDED_EVENTS:
1298                 stream = bt_message_discarded_events_borrow_stream_const(msg);
1299
1300                 if (bt_message_discarded_events_get_count(msg, &count) ==
1301                                 BT_PROPERTY_AVAILABILITY_NOT_AVAILABLE) {
1302                         count = UINT64_C(-1);
1303                 }
1304
1305                 elem_type = "event";
1306                 break;
1307         case BT_MESSAGE_TYPE_DISCARDED_PACKETS:
1308                 stream = bt_message_discarded_packets_borrow_stream_const(msg);
1309
1310                 if (bt_message_discarded_packets_get_count(msg, &count) ==
1311                                 BT_PROPERTY_AVAILABILITY_NOT_AVAILABLE) {
1312                         count = UINT64_C(-1);
1313                 }
1314
1315                 elem_type = "packet";
1316                 break;
1317         default:
1318                 abort();
1319         }
1320
1321         BT_ASSERT(stream);
1322         stream_class = bt_stream_borrow_class_const(stream);
1323
1324         switch (bt_message_get_type(msg)) {
1325         case BT_MESSAGE_TYPE_DISCARDED_EVENTS:
1326                 if (bt_stream_class_discarded_events_have_default_clock_snapshots(
1327                                 stream_class)) {
1328                         begin = bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const(
1329                                 msg);
1330                         end = bt_message_discarded_events_borrow_end_default_clock_snapshot_const(
1331                                 msg);
1332                 }
1333
1334                 break;
1335         case BT_MESSAGE_TYPE_DISCARDED_PACKETS:
1336                 if (bt_stream_class_discarded_packets_have_default_clock_snapshots(
1337                                 stream_class)) {
1338                         begin = bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const(
1339                                 msg);
1340                         end = bt_message_discarded_packets_borrow_end_default_clock_snapshot_const(
1341                                 msg);
1342                 }
1343
1344                 break;
1345         default:
1346                 abort();
1347         }
1348
1349         print_discarded_elements_msg(pretty, stream, begin, end,
1350                 count, elem_type);
1351         return 0;
1352 }