src/common/common.h

   1 #ifndef BABELTRACE_COMMON_INTERNAL_H
   2 #define BABELTRACE_COMMON_INTERNAL_H
   3
   4 /*
   5  * Copyright (c) 2018 EfficiOS Inc. and Linux Foundation
   6  * Copyright (c) 2018 Philippe Proulx <pproulx@efficios.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  21  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  */
  26
  27 #include <errno.h>
  28 #include <glib.h>
  29 #include <inttypes.h>
  30 #include <stdarg.h>
  31 #include <stdbool.h>
  32 #include <stdint.h>
  33 #include <stdlib.h>
  34 #include <unistd.h>
  35 #include <string.h>
  36
  37 #include <babeltrace2/babeltrace.h>
  38
  39 #define __BT_IN_BABELTRACE_H
  40 #include <babeltrace2/func-status.h>
  41
  42 #include "common/assert.h"
  43 #include "common/macros.h"
  44 #include "common/safe.h"
  45
  46 #define BT_COMMON_COLOR_RESET              "\033[0m"
  47 #define BT_COMMON_COLOR_BOLD               "\033[1m"
  48 #define BT_COMMON_COLOR_FG_DEFAULT         "\033[39m"
  49 #define BT_COMMON_COLOR_FG_RED             "\033[31m"
  50 #define BT_COMMON_COLOR_FG_GREEN           "\033[32m"
  51 #define BT_COMMON_COLOR_FG_YELLOW          "\033[33m"
  52 #define BT_COMMON_COLOR_FG_BLUE            "\033[34m"
  53 #define BT_COMMON_COLOR_FG_MAGENTA         "\033[35m"
  54 #define BT_COMMON_COLOR_FG_CYAN            "\033[36m"
  55 #define BT_COMMON_COLOR_FG_LIGHT_GRAY      "\033[37m"
  56 #define BT_COMMON_COLOR_BG_DEFAULT         "\033[49m"
  57 #define BT_COMMON_COLOR_BG_RED             "\033[41m"
  58 #define BT_COMMON_COLOR_BG_GREEN           "\033[42m"
  59 #define BT_COMMON_COLOR_BG_YELLOW          "\033[43m"
  60 #define BT_COMMON_COLOR_BG_BLUE            "\033[44m"
  61 #define BT_COMMON_COLOR_BG_MAGENTA         "\033[45m"
  62 #define BT_COMMON_COLOR_BG_CYAN            "\033[46m"
  63 #define BT_COMMON_COLOR_BG_LIGHT_GRAY      "\033[47m"
  64
  65 struct bt_common_lttng_live_url_parts {
  66         GString *proto;
  67         GString *hostname;
  68         GString *target_hostname;
  69         GString *session_name;
  70
  71         /* -1 means default port */
  72         int port;
  73 };
  74
  75 /*
  76  * Checks if the current process has setuid or setgid access rights.
  77  * Returns `true` if so.
  78  */
  79 BT_HIDDEN
  80 bool bt_common_is_setuid_setgid(void);
  81
  82 /*
  83  * Returns the system-wide plugin path, e.g.
  84  * `/usr/lib/babeltrace2/plugins`. Do not free the return value.
  85  */
  86 BT_HIDDEN
  87 const char *bt_common_get_system_plugin_path(void);
  88
  89 /*
  90  * Returns the user plugin path, e.g.
  91  * `/home/user/.local/lib/babeltrace2/plugins`. You need to free the
  92  * return value.
  93  */
  94 BT_HIDDEN
  95 char *bt_common_get_home_plugin_path(int log_level);
  96
  97 /*
  98  * Appends the list of directories in `paths` to the array `dirs`.
  99  * `paths` is a list of directories separated by `:`. Returns 0 on
 100  * success.
 101  */
 102 BT_HIDDEN
 103 int bt_common_append_plugin_path_dirs(const char *paths, GPtrArray *dirs);
 104
 105 /*
 106  * Returns `true` if terminal color codes are supported for this
 107  * process.
 108  */
 109 BT_HIDDEN
 110 bool bt_common_colors_supported(void);
 111
 112 BT_HIDDEN
 113 const char *bt_common_color_reset(void);
 114
 115 BT_HIDDEN
 116 const char *bt_common_color_bold(void);
 117
 118 BT_HIDDEN
 119 const char *bt_common_color_fg_default(void);
 120
 121 BT_HIDDEN
 122 const char *bt_common_color_fg_red(void);
 123
 124 BT_HIDDEN
 125 const char *bt_common_color_fg_green(void);
 126
 127 BT_HIDDEN
 128 const char *bt_common_color_fg_yellow(void);
 129
 130 BT_HIDDEN
 131 const char *bt_common_color_fg_blue(void);
 132
 133 BT_HIDDEN
 134 const char *bt_common_color_fg_magenta(void);
 135
 136 BT_HIDDEN
 137 const char *bt_common_color_fg_cyan(void);
 138
 139 BT_HIDDEN
 140 const char *bt_common_color_fg_light_gray(void);
 141
 142 BT_HIDDEN
 143 const char *bt_common_color_bg_default(void);
 144
 145 BT_HIDDEN
 146 const char *bt_common_color_bg_red(void);
 147
 148 BT_HIDDEN
 149 const char *bt_common_color_bg_green(void);
 150
 151 BT_HIDDEN
 152 const char *bt_common_color_bg_yellow(void);
 153
 154 BT_HIDDEN
 155 const char *bt_common_color_bg_blue(void);
 156
 157 BT_HIDDEN
 158 const char *bt_common_color_bg_magenta(void);
 159
 160 BT_HIDDEN
 161 const char *bt_common_color_bg_cyan(void);
 162
 163 BT_HIDDEN
 164 const char *bt_common_color_bg_light_gray(void);
 165
 166 /*
 167  * Returns the substring from `input` to the first character found
 168  * in the list of characters `end_chars`, unescaping any character
 169  * found in `escapable_chars`, and sets `*end_pos` to the position of
 170  * the end (from `input`). The caller owns the returned GString.
 171  */
 172 BT_HIDDEN
 173 GString *bt_common_string_until(const char *input, const char *escapable_chars,
 174                     const char *end_chars, size_t *end_pos);
 175
 176 /*
 177  * Returns the quoted version of `input` for a shell. If
 178  * `with_single_quotes` is `true`, prepends and appends the `'` prefix
 179  * and suffix to the returned string; otherwise the caller should
 180  * prepend and append them manually, although they are not always
 181  * required. The caller owns the returned GString.
 182  */
 183 BT_HIDDEN
 184 GString *bt_common_shell_quote(const char *input, bool with_single_quotes);
 185
 186 /*
 187  * Returns `true` if `input` is a string made only of printable
 188  * characters.
 189  */
 190 BT_HIDDEN
 191 bool bt_common_string_is_printable(const char *input);
 192
 193 /*
 194  * Destroys the parts of an LTTng live URL as returned by
 195  * bt_common_parse_lttng_live_url().
 196  */
 197 BT_HIDDEN
 198 void bt_common_destroy_lttng_live_url_parts(
 199                 struct bt_common_lttng_live_url_parts *parts);
 200
 201 /*
 202  * Parses the LTTng live URL `url` and returns its different parts.
 203  * If there's an error, writes the error message into `*error_buf`
 204  * up to `error_buf_size` bytes. You must destroy the returned value
 205  * with bt_common_destroy_lttng_live_url_parts().
 206  */
 207 BT_HIDDEN
 208 struct bt_common_lttng_live_url_parts bt_common_parse_lttng_live_url(
 209                 const char *url, char *error_buf, size_t error_buf_size);
 210
 211 /*
 212  * Normalizes (in place) a star globbing pattern to be used with
 213  * bt_common_star_glob_match(). This function always succeeds.
 214  */
 215 BT_HIDDEN
 216 void bt_common_normalize_star_glob_pattern(char *pattern);
 217
 218 /*
 219  * Returns `true` if `candidate` (of size `candidate_len`) matches
 220  * the star globbing pattern `pattern` (of size `pattern_len`).
 221  */
 222 BT_HIDDEN
 223 bool bt_common_star_glob_match(const char *pattern, size_t pattern_len,
 224                 const char *candidate, size_t candidate_len);
 225
 226 /*
 227  * Normalizes the path `path`:
 228  *
 229  * * If it's a relative path, converts it to an absolute path using
 230  *   `wd` as the working directory (or the current working directory
 231  *   if `wd` is NULL).
 232  * * Removes consecutive and trailing slashes.
 233  * * Resolves `..` and `.` in the path (both in `path` and in `wd`).
 234  * * Does NOT resolve symbolic links.
 235  *
 236  * The caller owns the returned GString.
 237  */
 238 BT_HIDDEN
 239 GString *bt_common_normalize_path(const char *path, const char *wd);
 240
 241 typedef void (* bt_common_handle_custom_specifier_func)(void *priv_data,
 242                 char **buf, size_t avail_size, const char **fmt, va_list *args);
 243
 244 /*
 245  * This is a custom vsnprintf() which handles the standard conversion
 246  * specifier as well as custom ones.
 247  *
 248  * `fmt` is a typical printf()-style format string, with the following
 249  * limitations:
 250  *
 251  * * The `*` width specifier is not accepted.
 252  * * The `*` precision specifier is not accepted.
 253  * * The `j` and `t` length modifiers are not accepted.
 254  * * The `n` format specifier is not accepted.
 255  * * The format specifiers defined in <inttypes.h> are not accepted
 256  *   except for `PRId64`, `PRIu64`, `PRIx64`, `PRIX64`, `PRIo64`, and
 257  *   `PRIi64`.
 258  *
 259  * `intro` specifies which special character immediately following an
 260  * introductory `%` character in `fmt` is used to indicate a custom
 261  * conversion specifier. For example, if `intro` is '@', then any `%@`
 262  * sequence in `fmt` is the beginning of a custom conversion specifier.
 263  *
 264  * When a custom conversion specifier is encountered in `fmt`,
 265  * the function calls `handle_specifier`. This callback receives:
 266  *
 267  * `priv_data`:
 268  *     Custom, private data.
 269  *
 270  * `buf`:
 271  *     Address of the current buffer pointer. `*buf` is the position to
 272  *     append new data. The callback must update `*buf` when appending
 273  *     new data. The callback must ensure not to write passed the whole
 274  *     buffer passed to bt_common_custom_vsnprintf().
 275  *
 276  * `avail_size`:
 277  *     Number of bytes left in whole buffer from the `*buf` point.
 278  *
 279  * `fmt`:
 280  *     Address of the current format string pointer. `*fmt` points to
 281  *     the introductory `%` character, which is followed by the
 282  *     character `intro`. The callback must update `*fmt` so that it
 283  *     points after the whole custom conversion specifier.
 284  *
 285  * `args`:
 286  *     Variable argument list. Use va_arg() to get new arguments from
 287  *     this list and update it at the same time.
 288  *
 289  * Because this is an internal utility, this function and its callback
 290  * do not return error codes: they abort when there's any error (bad
 291  * format string, for example).
 292  */
 293 BT_HIDDEN
 294 void bt_common_custom_vsnprintf(char *buf, size_t buf_size,
 295                 char intro,
 296                 bt_common_handle_custom_specifier_func handle_specifier,
 297                 void *priv_data, const char *fmt, va_list *args);
 298
 299 /*
 300  * Variadic form of bt_common_custom_vsnprintf().
 301  */
 302 BT_HIDDEN
 303 void bt_common_custom_snprintf(char *buf, size_t buf_size,
 304                 char intro,
 305                 bt_common_handle_custom_specifier_func handle_specifier,
 306                 void *priv_data, const char *fmt, ...);
 307
 308 /*
 309  * Returns the system page size.
 310  */
 311 BT_HIDDEN
 312 size_t bt_common_get_page_size(int log_level);
 313
 314 /*
 315  * Adds the digit separator `sep` as many times as needed to form groups
 316  * of `digits_per_group` digits within `str`. `str` must have enough
 317  * room to accomodate the new separators, that is:
 318  *
 319  *     strlen(str) + (strlen(str) / digits_per_group) + 1
 320  *
 321  * Example: with `str` `1983198398213`, `digits_per_group` 3, and `sep`
 322  * `,`, `str` becomes `1,983,198,398,213`.
 323  *
 324  * `strlen(str)` must not be 0. `digits_per_group` must not be 0. `sep`
 325  * must not be `\0`.
 326  */
 327 BT_HIDDEN
 328 void bt_common_sep_digits(char *str, unsigned int digits_per_group, char sep);
 329
 330 /*
 331  * This is similar to what the command `fold --spaces` does: it wraps
 332  * the input lines of `str`, breaking at spaces, and indenting each line
 333  * with `indent` spaces so that each line fits the total length
 334  * `total_length`.
 335  *
 336  * If an original line in `str` contains a word which is >= the content
 337  * length (`total_length - indent`), then the corresponding folded line
 338  * is also larger than the content length. In other words, breaking at
 339  * spaces is a best effort, but it might not be possible.
 340  *
 341  * The returned string, on success, is owned by the caller.
 342  */
 343 BT_HIDDEN
 344 GString *bt_common_fold(const char *str, unsigned int total_length,
 345                 unsigned int indent);
 346
 347 /*
 348  * Writes the terminal's width to `*width`, its height to `*height`,
 349  * and returns 0 on success, or returns -1 on error.
 350  */
 351 BT_HIDDEN
 352 int bt_common_get_term_size(unsigned int *width, unsigned int *height);
 353
 354 /*
 355  * Wraps read() function to handle EINTR and partial reads.
 356  * On success, it returns `count` received as parameter. On error, it returns a
 357  * value smaller than the requested `count`.
 358  */
 359 static inline
 360 ssize_t bt_common_read(int fd, void *buf, size_t count, int log_level)
 361 {
 362         size_t i = 0;
 363         ssize_t ret;
 364
 365         BT_ASSERT(buf);
 366
 367         /* Never return an overflow value. */
 368         BT_ASSERT(count <= SSIZE_MAX);
 369
 370         do {
 371                 ret = read(fd, buf + i, count - i);
 372                 if (ret < 0) {
 373                         if (errno == EINTR) {
 374 #ifdef BT_LOG_WRITE_CUR_LVL
 375                                 BT_LOG_WRITE_CUR_LVL(BT_LOG_DEBUG, log_level,
 376                                         BT_LOG_TAG,
 377                                         "read() call interrupted; retrying...");
 378 #endif
 379                                 /* retry operation */
 380                                 continue;
 381                         } else {
 382 #ifdef BT_LOG_WRITE_ERRNO_CUR_LVL
 383                                 BT_LOG_WRITE_ERRNO_CUR_LVL(BT_LOG_ERROR,
 384                                         log_level, BT_LOG_TAG,
 385                                         "Error while reading", ": fd=%d", fd);
 386 #endif
 387                                 goto end;
 388                         }
 389                 }
 390                 i += ret;
 391                 BT_ASSERT(i <= count);
 392         } while (count - i > 0 && ret > 0);
 393
 394 end:
 395         if (ret >= 0) {
 396                 if (i == 0) {
 397                         ret = -1;
 398                 } else {
 399                         ret = i;
 400                 }
 401         }
 402
 403         return ret;
 404 }
 405
 406 static inline
 407 const char *bt_common_field_class_type_string(enum bt_field_class_type class_type)
 408 {
 409         switch (class_type) {
 410         case BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER:
 411                 return "UNSIGNED_INTEGER";
 412         case BT_FIELD_CLASS_TYPE_SIGNED_INTEGER:
 413                 return "SIGNED_INTEGER";
 414         case BT_FIELD_CLASS_TYPE_REAL:
 415                 return "REAL";
 416         case BT_FIELD_CLASS_TYPE_UNSIGNED_ENUMERATION:
 417                 return "UNSIGNED_ENUMERATION";
 418         case BT_FIELD_CLASS_TYPE_SIGNED_ENUMERATION:
 419                 return "SIGNED_ENUMERATION";
 420         case BT_FIELD_CLASS_TYPE_STRING:
 421                 return "STRING";
 422         case BT_FIELD_CLASS_TYPE_STRUCTURE:
 423                 return "STRUCTURE";
 424         case BT_FIELD_CLASS_TYPE_STATIC_ARRAY:
 425                 return "STATIC_ARRAY";
 426         case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY:
 427                 return "DYNAMIC_ARRAY";
 428         case BT_FIELD_CLASS_TYPE_VARIANT_WITHOUT_SELECTOR:
 429                 return "VARIANT_WITHOUT_SELECTOR";
 430         case BT_FIELD_CLASS_TYPE_VARIANT_WITH_UNSIGNED_SELECTOR:
 431                 return "VARIANT_WITH_UNSIGNED_SELECTOR";
 432         case BT_FIELD_CLASS_TYPE_VARIANT_WITH_SIGNED_SELECTOR:
 433                 return "VARIANT_WITH_SIGNED_SELECTOR";
 434         default:
 435                 return "(unknown)";
 436         }
 437 };
 438
 439 static inline
 440 const char *bt_common_field_class_integer_preferred_display_base_string(enum bt_field_class_integer_preferred_display_base base)
 441 {
 442         switch (base) {
 443         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_BINARY:
 444                 return "BINARY";
 445         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_OCTAL:
 446                 return "OCTAL";
 447         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_DECIMAL:
 448                 return "DECIMAL";
 449         case BT_FIELD_CLASS_INTEGER_PREFERRED_DISPLAY_BASE_HEXADECIMAL:
 450                 return "HEXADECIMAL";
 451         default:
 452                 return "(unknown)";
 453         }
 454 }
 455
 456 static inline
 457 const char *bt_common_scope_string(enum bt_field_path_scope scope)
 458 {
 459         switch (scope) {
 460         case BT_FIELD_PATH_SCOPE_PACKET_CONTEXT:
 461                 return "PACKET_CONTEXT";
 462         case BT_FIELD_PATH_SCOPE_EVENT_COMMON_CONTEXT:
 463                 return "EVENT_COMMON_CONTEXT";
 464         case BT_FIELD_PATH_SCOPE_EVENT_SPECIFIC_CONTEXT:
 465                 return "EVENT_SPECIFIC_CONTEXT";
 466         case BT_FIELD_PATH_SCOPE_EVENT_PAYLOAD:
 467                 return "EVENT_PAYLOAD";
 468         default:
 469                 return "(unknown)";
 470         }
 471 }
 472
 473 static inline
 474 const char *bt_common_event_class_log_level_string(
 475                 enum bt_event_class_log_level level)
 476 {
 477         switch (level) {
 478         case BT_EVENT_CLASS_LOG_LEVEL_EMERGENCY:
 479                 return "EMERGENCY";
 480         case BT_EVENT_CLASS_LOG_LEVEL_ALERT:
 481                 return "ALERT";
 482         case BT_EVENT_CLASS_LOG_LEVEL_CRITICAL:
 483                 return "CRITICAL";
 484         case BT_EVENT_CLASS_LOG_LEVEL_ERROR:
 485                 return "ERROR";
 486         case BT_EVENT_CLASS_LOG_LEVEL_WARNING:
 487                 return "WARNING";
 488         case BT_EVENT_CLASS_LOG_LEVEL_NOTICE:
 489                 return "NOTICE";
 490         case BT_EVENT_CLASS_LOG_LEVEL_INFO:
 491                 return "INFO";
 492         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_SYSTEM:
 493                 return "DEBUG_SYSTEM";
 494         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_PROGRAM:
 495                 return "DEBUG_PROGRAM";
 496         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_PROCESS:
 497                 return "DEBUG_PROCESS";
 498         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_MODULE:
 499                 return "DEBUG_MODULE";
 500         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_UNIT:
 501                 return "DEBUG_UNIT";
 502         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_FUNCTION:
 503                 return "DEBUG_FUNCTION";
 504         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG_LINE:
 505                 return "DEBUG_LINE";
 506         case BT_EVENT_CLASS_LOG_LEVEL_DEBUG:
 507                 return "DEBUG";
 508         default:
 509                 return "(unknown)";
 510         }
 511 };
 512
 513 static inline
 514 const char *bt_common_value_type_string(enum bt_value_type type)
 515 {
 516         switch (type) {
 517         case BT_VALUE_TYPE_NULL:
 518                 return "NULL";
 519         case BT_VALUE_TYPE_BOOL:
 520                 return "BOOL";
 521         case BT_VALUE_TYPE_UNSIGNED_INTEGER:
 522                 return "UNSIGNED_INTEGER";
 523         case BT_VALUE_TYPE_SIGNED_INTEGER:
 524                 return "SIGNED_INTEGER";
 525         case BT_VALUE_TYPE_REAL:
 526                 return "REAL";
 527         case BT_VALUE_TYPE_STRING:
 528                 return "STRING";
 529         case BT_VALUE_TYPE_ARRAY:
 530                 return "ARRAY";
 531         case BT_VALUE_TYPE_MAP:
 532                 return "MAP";
 533         default:
 534                 return "(unknown)";
 535         }
 536 };
 537
 538 static inline
 539 GString *bt_common_field_path_string(struct bt_field_path *path)
 540 {
 541         GString *str = g_string_new(NULL);
 542         uint64_t i;
 543
 544         BT_ASSERT(path);
 545
 546         if (!str) {
 547                 goto end;
 548         }
 549
 550         g_string_append_printf(str, "[%s", bt_common_scope_string(
 551                 bt_field_path_get_root_scope(path)));
 552
 553         for (i = 0; i < bt_field_path_get_item_count(path); i++) {
 554                 const struct bt_field_path_item *fp_item =
 555                         bt_field_path_borrow_item_by_index_const(path, i);
 556
 557                 switch (bt_field_path_item_get_type(fp_item)) {
 558                 case BT_FIELD_PATH_ITEM_TYPE_INDEX:
 559                         g_string_append_printf(str, ", %" PRIu64,
 560                                 bt_field_path_item_index_get_index(fp_item));
 561                         break;
 562                 case BT_FIELD_PATH_ITEM_TYPE_CURRENT_ARRAY_ELEMENT:
 563                         g_string_append(str, ", <CUR>");
 564                         break;
 565                 default:
 566                         abort();
 567                 }
 568         }
 569
 570         g_string_append(str, "]");
 571
 572 end:
 573         return str;
 574 }
 575
 576 static inline
 577 const char *bt_common_logging_level_string(
 578                 enum bt_logging_level level)
 579 {
 580         switch (level) {
 581         case BT_LOGGING_LEVEL_TRACE:
 582                 return "TRACE";
 583         case BT_LOGGING_LEVEL_DEBUG:
 584                 return "DEBUG";
 585         case BT_LOGGING_LEVEL_INFO:
 586                 return "INFO";
 587         case BT_LOGGING_LEVEL_WARNING:
 588                 return "WARNING";
 589         case BT_LOGGING_LEVEL_ERROR:
 590                 return "ERROR";
 591         case BT_LOGGING_LEVEL_FATAL:
 592                 return "FATAL";
 593         case BT_LOGGING_LEVEL_NONE:
 594                 return "NONE";
 595         default:
 596                 return "(unknown)";
 597         }
 598 };
 599
 600 static inline
 601 const char *bt_common_func_status_string(int status)
 602 {
 603         switch (status) {
 604         case __BT_FUNC_STATUS_OVERFLOW_ERROR:
 605                 return "OVERFLOW";
 606         case __BT_FUNC_STATUS_INVALID_OBJECT:
 607                 return "INVALID_OBJECT";
 608         case __BT_FUNC_STATUS_MEMORY_ERROR:
 609                 return "MEMORY_ERROR";
 610         case __BT_FUNC_STATUS_ERROR:
 611                 return "ERROR";
 612         case __BT_FUNC_STATUS_OK:
 613                 return "OK";
 614         case __BT_FUNC_STATUS_END:
 615                 return "END";
 616         case __BT_FUNC_STATUS_NOT_FOUND:
 617                 return "NOT_FOUND";
 618         case __BT_FUNC_STATUS_AGAIN:
 619                 return "AGAIN";
 620         case __BT_FUNC_STATUS_INTERRUPTED:
 621                 return "INTERRUPTED";
 622         default:
 623                 return "(unknown)";
 624         }
 625 }
 626
 627 #define NS_PER_S_I      INT64_C(1000000000)
 628 #define NS_PER_S_U      UINT64_C(1000000000)
 629
 630 static inline
 631 int bt_common_clock_value_from_ns_from_origin(
 632                 int64_t cc_offset_seconds, uint64_t cc_offset_cycles,
 633                 uint64_t cc_freq, int64_t ns_from_origin,
 634                 uint64_t *raw_value)
 635 {
 636         int ret = 0;
 637         int64_t offset_in_ns;
 638         uint64_t value_in_ns;
 639         uint64_t rem_value_in_ns;
 640         uint64_t value_periods;
 641         uint64_t value_period_cycles;
 642         int64_t ns_to_add;
 643
 644         BT_ASSERT(raw_value);
 645
 646         /* Compute offset part of requested value, in nanoseconds */
 647         if (!bt_safe_to_mul_int64(cc_offset_seconds, NS_PER_S_I)) {
 648                 ret = -1;
 649                 goto end;
 650         }
 651
 652         offset_in_ns = cc_offset_seconds * NS_PER_S_I;
 653
 654         if (cc_freq == NS_PER_S_U) {
 655                 ns_to_add = (int64_t) cc_offset_cycles;
 656         } else {
 657                 if (!bt_safe_to_mul_int64((int64_t) cc_offset_cycles,
 658                                 NS_PER_S_I)) {
 659                         ret = -1;
 660                         goto end;
 661                 }
 662
 663                 ns_to_add = ((int64_t) cc_offset_cycles * NS_PER_S_I) /
 664                         (int64_t) cc_freq;
 665         }
 666
 667         if (!bt_safe_to_add_int64(offset_in_ns, ns_to_add)) {
 668                 ret = -1;
 669                 goto end;
 670         }
 671
 672         offset_in_ns += ns_to_add;
 673
 674         /* Value part in nanoseconds */
 675         if (ns_from_origin < offset_in_ns) {
 676                 ret = -1;
 677                 goto end;
 678         }
 679
 680         value_in_ns = (uint64_t) (ns_from_origin - offset_in_ns);
 681
 682         /* Number of whole clock periods in `value_in_ns` */
 683         value_periods = value_in_ns / NS_PER_S_U;
 684
 685         /* Remaining nanoseconds in cycles + whole clock periods in cycles */
 686         rem_value_in_ns = value_in_ns - value_periods * NS_PER_S_U;
 687
 688         if (value_periods > UINT64_MAX / cc_freq) {
 689                 ret = -1;
 690                 goto end;
 691         }
 692
 693         if (!bt_safe_to_mul_uint64(value_periods, cc_freq)) {
 694                 ret = -1;
 695                 goto end;
 696         }
 697
 698         value_period_cycles = value_periods * cc_freq;
 699
 700         if (!bt_safe_to_mul_uint64(cc_freq, rem_value_in_ns)) {
 701                 ret = -1;
 702                 goto end;
 703         }
 704
 705         if (!bt_safe_to_add_uint64(cc_freq * rem_value_in_ns / NS_PER_S_U,
 706                         value_period_cycles)) {
 707                 ret = -1;
 708                 goto end;
 709         }
 710
 711         *raw_value = cc_freq * rem_value_in_ns / NS_PER_S_U +
 712                 value_period_cycles;
 713
 714 end:
 715         return ret;
 716 }
 717
 718 /*
 719  * bt_g_string_append_printf cannot be inlined because it expects a
 720  * variadic argument list.
 721  */
 722 BT_HIDDEN
 723 int bt_common_g_string_append_printf(GString *str, const char *fmt, ...);
 724
 725 static inline
 726 void bt_common_g_string_append(GString *str, const char *s)
 727 {
 728         gsize len, allocated_len, s_len;
 729
 730         /* str->len excludes \0. */
 731         len = str->len;
 732         /* Exclude \0. */
 733         allocated_len = str->allocated_len - 1;
 734         s_len = strlen(s);
 735         if (G_UNLIKELY(allocated_len < len + s_len)) {
 736                 /* Resize. */
 737                 g_string_set_size(str, len + s_len);
 738         } else {
 739                 str->len = len + s_len;
 740         }
 741         memcpy(str->str + len, s, s_len + 1);
 742 }
 743
 744 static inline
 745 void bt_common_g_string_append_c(GString *str, char c)
 746 {
 747         gsize len, allocated_len, s_len;
 748
 749         /* str->len excludes \0. */
 750         len = str->len;
 751         /* Exclude \0. */
 752         allocated_len = str->allocated_len - 1;
 753         s_len = 1;
 754         if (G_UNLIKELY(allocated_len < len + s_len)) {
 755                 /* Resize. */
 756                 g_string_set_size(str, len + s_len);
 757         } else {
 758                 str->len = len + s_len;
 759         }
 760         str->str[len] = c;
 761         str->str[len + 1] = '\0';
 762 }
 763
 764 #endif /* BABELTRACE_COMMON_INTERNAL_H */