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0220be14 JG |
1 | /* |
2 | * Copyright (C) 2022 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #ifndef LTTNG_FIELD_H | |
9 | #define LTTNG_FIELD_H | |
10 | ||
6e01cdc6 | 11 | #include <common/format.hpp> |
b6bbb1d6 | 12 | #include <common/make-unique.hpp> |
6e01cdc6 JG |
13 | |
14 | #include <vendor/optional.hpp> | |
15 | ||
45110cdd | 16 | #include <algorithm> |
0220be14 JG |
17 | #include <memory> |
18 | #include <string> | |
19 | #include <type_traits> | |
20 | #include <vector> | |
21 | ||
0220be14 JG |
22 | namespace lttng { |
23 | namespace sessiond { | |
24 | namespace trace { | |
25 | ||
26 | class field_visitor; | |
27 | class type_visitor; | |
28 | ||
24ed18f2 JG |
29 | enum class byte_order { |
30 | BIG_ENDIAN_, | |
31 | LITTLE_ENDIAN_, | |
32 | }; | |
33 | ||
eda1aa02 JG |
34 | class field_location { |
35 | public: | |
36 | enum class root { | |
37 | PACKET_HEADER, | |
38 | PACKET_CONTEXT, | |
39 | EVENT_RECORD_HEADER, | |
40 | EVENT_RECORD_COMMON_CONTEXT, | |
41 | EVENT_RECORD_SPECIFIC_CONTEXT, | |
42 | EVENT_RECORD_PAYLOAD, | |
43 | }; | |
44 | ||
45 | using elements = std::vector<std::string>; | |
46 | ||
47 | field_location(root lookup_root, elements elements); | |
48 | bool operator==(const field_location& other) const noexcept; | |
49 | ||
50 | const root root_; | |
51 | const elements elements_; | |
52 | }; | |
53 | ||
0220be14 JG |
54 | /* |
55 | * Field, and the various field types, represents fields as exposed by the | |
56 | * LTTng tracers. These classes do not attempt to describe the complete spectrum of the CTF | |
57 | * specification. | |
58 | */ | |
59 | ||
60 | class type { | |
61 | public: | |
62 | using cuptr = std::unique_ptr<const type>; | |
63 | ||
64 | static byte_order reverse_byte_order(byte_order byte_order) noexcept; | |
65 | ||
66 | bool operator==(const type& other) const noexcept; | |
67 | bool operator!=(const type& other) const noexcept; | |
9d89db29 | 68 | |
0220be14 | 69 | virtual ~type(); |
9d89db29 JG |
70 | type(const type&) = delete; |
71 | type(type&&) = delete; | |
72 | type& operator=(type&&) = delete; | |
73 | type& operator=(const type&) = delete; | |
b6bbb1d6 JG |
74 | |
75 | /* Obtain an independent copy of `type`. */ | |
76 | virtual type::cuptr copy() const = 0; | |
77 | ||
0220be14 JG |
78 | virtual void accept(type_visitor& visitor) const = 0; |
79 | ||
80 | const unsigned int alignment; | |
81 | ||
82 | protected: | |
cd9adb8b | 83 | explicit type(unsigned int alignment); |
0220be14 JG |
84 | |
85 | private: | |
86 | virtual bool _is_equal(const type& rhs) const noexcept = 0; | |
87 | }; | |
88 | ||
89 | class field { | |
90 | public: | |
45110cdd | 91 | using uptr = std::unique_ptr<field>; |
0220be14 JG |
92 | using cuptr = std::unique_ptr<const field>; |
93 | ||
94 | field(std::string name, type::cuptr type); | |
95 | void accept(field_visitor& visitor) const; | |
96 | bool operator==(const field& other) const noexcept; | |
97 | ||
45110cdd JG |
98 | const type& get_type() const; |
99 | type::cuptr move_type() noexcept; | |
100 | ||
0220be14 | 101 | const std::string name; |
45110cdd JG |
102 | |
103 | private: | |
104 | type::cuptr _type; | |
0220be14 JG |
105 | }; |
106 | ||
107 | class integer_type : public type { | |
108 | public: | |
109 | enum class signedness { | |
110 | SIGNED, | |
111 | UNSIGNED, | |
112 | }; | |
113 | ||
114 | enum class base { | |
115 | BINARY = 2, | |
116 | OCTAL = 8, | |
117 | DECIMAL = 10, | |
118 | HEXADECIMAL = 16, | |
119 | }; | |
120 | ||
e7360180 JG |
121 | enum class role { |
122 | DEFAULT_CLOCK_TIMESTAMP, | |
123 | /* Packet header field class specific roles. */ | |
124 | DATA_STREAM_CLASS_ID, | |
125 | DATA_STREAM_ID, | |
126 | PACKET_MAGIC_NUMBER, | |
127 | /* Packet context field class specific roles. */ | |
128 | DISCARDED_EVENT_RECORD_COUNTER_SNAPSHOT, | |
129 | PACKET_CONTENT_LENGTH, | |
130 | PACKET_END_DEFAULT_CLOCK_TIMESTAMP, | |
131 | PACKET_SEQUENCE_NUMBER, | |
132 | PACKET_TOTAL_LENGTH, | |
133 | /* Event record field class roles. */ | |
134 | EVENT_RECORD_CLASS_ID, | |
135 | }; | |
136 | ||
137 | using roles = std::vector<role>; | |
138 | ||
0220be14 JG |
139 | integer_type(unsigned int alignment, |
140 | byte_order byte_order, | |
141 | unsigned int size, | |
142 | signedness signedness, | |
e7360180 JG |
143 | base base, |
144 | roles roles = {}); | |
0220be14 | 145 | |
cd9adb8b | 146 | type::cuptr copy() const override; |
b6bbb1d6 | 147 | |
cd9adb8b | 148 | void accept(type_visitor& visitor) const override; |
0220be14 JG |
149 | |
150 | const enum byte_order byte_order; | |
151 | const unsigned int size; | |
65cd3c0c JG |
152 | /* |
153 | * signedness and base are suffixed with '_' to work-around a bug in older | |
154 | * GCCs (before 6) that do not recognize hidden/shadowed enumeration as valid | |
155 | * nested-name-specifiers. | |
156 | */ | |
157 | const signedness signedness_; | |
158 | const base base_; | |
e7360180 | 159 | const roles roles_; |
0220be14 JG |
160 | |
161 | protected: | |
cd9adb8b | 162 | bool _is_equal(const type& other) const noexcept override; |
0220be14 JG |
163 | }; |
164 | ||
165 | class floating_point_type : public type { | |
166 | public: | |
167 | floating_point_type(unsigned int alignment, | |
168 | byte_order byte_order, | |
169 | unsigned int exponent_digits, | |
170 | unsigned int mantissa_digits); | |
171 | ||
cd9adb8b | 172 | type::cuptr copy() const final; |
b6bbb1d6 | 173 | |
cd9adb8b | 174 | void accept(type_visitor& visitor) const final; |
0220be14 JG |
175 | |
176 | const enum byte_order byte_order; | |
177 | const unsigned int exponent_digits; | |
178 | const unsigned int mantissa_digits; | |
179 | ||
180 | private: | |
cd9adb8b | 181 | bool _is_equal(const type& other) const noexcept final; |
0220be14 JG |
182 | }; |
183 | ||
184 | class enumeration_type : public integer_type { | |
9d89db29 JG |
185 | public: |
186 | ~enumeration_type() override = default; | |
187 | enumeration_type(const enumeration_type&) = delete; | |
188 | enumeration_type(enumeration_type&&) = delete; | |
189 | enumeration_type& operator=(enumeration_type&&) = delete; | |
190 | enumeration_type& operator=(const enumeration_type&) = delete; | |
191 | ||
0220be14 JG |
192 | protected: |
193 | enumeration_type(unsigned int alignment, | |
9d89db29 JG |
194 | enum byte_order byte_order, |
195 | unsigned int size, | |
196 | enum signedness signedness, | |
197 | enum base base, | |
198 | integer_type::roles roles = {}); | |
0220be14 | 199 | |
cd9adb8b | 200 | void accept(type_visitor& visitor) const override = 0; |
0220be14 JG |
201 | }; |
202 | ||
203 | namespace details { | |
204 | template <class MappingIntegerType> | |
205 | class enumeration_mapping_range { | |
206 | public: | |
207 | using range_integer_t = MappingIntegerType; | |
208 | ||
209 | enumeration_mapping_range(MappingIntegerType in_begin, MappingIntegerType in_end) : | |
210 | begin{in_begin}, end{in_end} | |
211 | { | |
212 | } | |
213 | ||
214 | const range_integer_t begin, end; | |
215 | }; | |
216 | ||
217 | template <class MappingIntegerType> | |
218 | bool operator==(const enumeration_mapping_range<MappingIntegerType>& lhs, | |
219 | const enumeration_mapping_range<MappingIntegerType>& rhs) noexcept | |
220 | { | |
221 | return lhs.begin == rhs.begin && lhs.end == rhs.end; | |
222 | } | |
223 | ||
224 | template <class MappingIntegerType> | |
225 | class enumeration_mapping { | |
226 | public: | |
227 | using range_t = enumeration_mapping_range<MappingIntegerType>; | |
228 | ||
9d89db29 JG |
229 | enumeration_mapping(std::string in_name, MappingIntegerType value) : |
230 | name{ std::move(in_name) }, range{ value, value } | |
0220be14 JG |
231 | { |
232 | } | |
233 | ||
9d89db29 JG |
234 | enumeration_mapping(std::string in_name, range_t in_range) : |
235 | name{ std::move(in_name) }, range{ in_range } | |
0220be14 JG |
236 | { |
237 | } | |
238 | ||
9d89db29 JG |
239 | enumeration_mapping(const enumeration_mapping<MappingIntegerType>& other) = default; |
240 | enumeration_mapping(enumeration_mapping<MappingIntegerType>&& other) noexcept : | |
241 | name{ std::move(other.name) }, range{ other.range } | |
0220be14 JG |
242 | { |
243 | } | |
244 | ||
9d89db29 JG |
245 | enumeration_mapping& operator=(enumeration_mapping&&) = delete; |
246 | enumeration_mapping& operator=(const enumeration_mapping&) = delete; | |
247 | ~enumeration_mapping() = default; | |
248 | ||
0220be14 | 249 | const std::string name; |
da9dd521 JG |
250 | /* |
251 | * Only one range per mapping is supported for the moment as | |
252 | * the tracers (and CTF 1.8) can't express multiple ranges per | |
253 | * mapping, which is allowed by CTF 2. | |
254 | */ | |
255 | const range_t range; | |
0220be14 JG |
256 | }; |
257 | ||
258 | template <class MappingIntegerType> | |
259 | bool operator==(const enumeration_mapping<MappingIntegerType>& lhs, | |
260 | const enumeration_mapping<MappingIntegerType>& rhs) noexcept | |
261 | { | |
262 | return lhs.name == rhs.name && lhs.range == rhs.range; | |
263 | } | |
264 | } /* namespace details */ | |
265 | ||
b6bbb1d6 | 266 | template <typename MappingIntegerType> |
0220be14 JG |
267 | class typed_enumeration_type : public enumeration_type { |
268 | public: | |
269 | using mapping = details::enumeration_mapping<MappingIntegerType>; | |
270 | using mappings = std::vector<mapping>; | |
271 | ||
272 | static_assert(std::is_integral<MappingIntegerType>::value && | |
273 | sizeof(MappingIntegerType) == 8, | |
274 | "MappingIntegerType must be either int64_t or uint64_t"); | |
275 | ||
276 | typed_enumeration_type(unsigned int in_alignment, | |
277 | enum byte_order in_byte_order, | |
278 | unsigned int in_size, | |
0220be14 | 279 | enum base in_base, |
e7360180 JG |
280 | const std::shared_ptr<const mappings>& in_mappings, |
281 | integer_type::roles in_roles = {}) : | |
0220be14 JG |
282 | enumeration_type(in_alignment, |
283 | in_byte_order, | |
284 | in_size, | |
e7360180 JG |
285 | std::is_signed<MappingIntegerType>::value ? |
286 | integer_type::signedness::SIGNED : | |
287 | integer_type::signedness::UNSIGNED, | |
288 | in_base, | |
289 | std::move(in_roles)), | |
da9dd521 | 290 | mappings_{std::move(in_mappings)} |
0220be14 JG |
291 | { |
292 | } | |
293 | ||
cd9adb8b | 294 | type::cuptr copy() const override |
b6bbb1d6 JG |
295 | { |
296 | return lttng::make_unique<typed_enumeration_type<MappingIntegerType>>( | |
297 | alignment, byte_order, size, base_, mappings_, roles_); | |
298 | } | |
299 | ||
cd9adb8b | 300 | void accept(type_visitor& visitor) const final; |
0220be14 | 301 | |
da9dd521 | 302 | const std::shared_ptr<const mappings> mappings_; |
0220be14 JG |
303 | |
304 | private: | |
cd9adb8b | 305 | bool _is_equal(const type& base_other) const noexcept final |
0220be14 JG |
306 | { |
307 | const auto& other = static_cast<const typed_enumeration_type<MappingIntegerType>&>( | |
308 | base_other); | |
309 | ||
da9dd521 | 310 | return integer_type::_is_equal(base_other) && *this->mappings_ == *other.mappings_; |
0220be14 JG |
311 | } |
312 | }; | |
313 | ||
314 | /* Aliases for all allowed enumeration mapping types. */ | |
315 | using signed_enumeration_type = typed_enumeration_type<int64_t>; | |
316 | using unsigned_enumeration_type = typed_enumeration_type<uint64_t>; | |
317 | ||
318 | class array_type : public type { | |
319 | public: | |
320 | array_type(unsigned int alignment, type::cuptr element_type); | |
321 | ||
d7bfb9b0 | 322 | const type::cuptr element_type; |
0220be14 JG |
323 | |
324 | protected: | |
cd9adb8b | 325 | bool _is_equal(const type& base_other) const noexcept override; |
0220be14 JG |
326 | }; |
327 | ||
328 | class static_length_array_type : public array_type { | |
329 | public: | |
330 | static_length_array_type(unsigned int alignment, | |
331 | type::cuptr element_type, | |
332 | uint64_t in_length); | |
333 | ||
cd9adb8b | 334 | type::cuptr copy() const final; |
b6bbb1d6 | 335 | |
cd9adb8b | 336 | void accept(type_visitor& visitor) const final; |
0220be14 JG |
337 | |
338 | const uint64_t length; | |
339 | ||
340 | private: | |
cd9adb8b | 341 | bool _is_equal(const type& base_other) const noexcept final; |
0220be14 JG |
342 | }; |
343 | ||
344 | class dynamic_length_array_type : public array_type { | |
345 | public: | |
346 | dynamic_length_array_type(unsigned int alignment, | |
347 | type::cuptr element_type, | |
eda1aa02 | 348 | field_location length_field_location); |
0220be14 | 349 | |
cd9adb8b | 350 | type::cuptr copy() const final; |
b6bbb1d6 | 351 | |
cd9adb8b | 352 | void accept(type_visitor& visitor) const final; |
0220be14 | 353 | |
eda1aa02 | 354 | const field_location length_field_location; |
0220be14 JG |
355 | |
356 | private: | |
cd9adb8b | 357 | bool _is_equal(const type& base_other) const noexcept final; |
0220be14 JG |
358 | }; |
359 | ||
e7360180 JG |
360 | class static_length_blob_type : public type { |
361 | public: | |
362 | enum class role { | |
363 | /* Packet header field class specific role. */ | |
da9dd521 | 364 | METADATA_STREAM_UUID, |
e7360180 JG |
365 | }; |
366 | ||
367 | using roles = std::vector<role>; | |
368 | ||
369 | static_length_blob_type(unsigned int alignment, uint64_t in_length_bytes, roles roles = {}); | |
370 | ||
cd9adb8b | 371 | type::cuptr copy() const final; |
b6bbb1d6 | 372 | |
cd9adb8b | 373 | void accept(type_visitor& visitor) const final; |
e7360180 JG |
374 | |
375 | const uint64_t length_bytes; | |
376 | const roles roles_; | |
377 | ||
378 | private: | |
cd9adb8b | 379 | bool _is_equal(const type& base_other) const noexcept final; |
e7360180 JG |
380 | }; |
381 | ||
382 | class dynamic_length_blob_type : public type { | |
383 | public: | |
eda1aa02 | 384 | dynamic_length_blob_type(unsigned int alignment, field_location length_field_location); |
e7360180 | 385 | |
cd9adb8b | 386 | type::cuptr copy() const final; |
b6bbb1d6 | 387 | |
cd9adb8b | 388 | void accept(type_visitor& visitor) const final; |
e7360180 | 389 | |
eda1aa02 | 390 | const field_location length_field_location; |
e7360180 JG |
391 | |
392 | private: | |
cd9adb8b | 393 | bool _is_equal(const type& base_other) const noexcept final; |
e7360180 JG |
394 | }; |
395 | ||
0220be14 JG |
396 | class string_type : public type { |
397 | public: | |
398 | enum class encoding { | |
399 | ASCII, | |
400 | UTF8, | |
401 | }; | |
402 | ||
403 | string_type(unsigned int alignment, enum encoding encoding); | |
404 | ||
65cd3c0c JG |
405 | /* |
406 | * encoding is suffixed with '_' to work-around a bug in older | |
407 | * GCCs (before 6) that do not recognize hidden/shadowed enumeration as valid | |
408 | * nested-name-specifiers. | |
409 | */ | |
410 | const encoding encoding_; | |
0220be14 JG |
411 | |
412 | protected: | |
cd9adb8b | 413 | bool _is_equal(const type& base_other) const noexcept override; |
0220be14 JG |
414 | }; |
415 | ||
416 | class static_length_string_type : public string_type { | |
417 | public: | |
418 | static_length_string_type( | |
419 | unsigned int alignment, enum encoding in_encoding, uint64_t length); | |
b6bbb1d6 | 420 | |
cd9adb8b | 421 | type::cuptr copy() const final; |
b6bbb1d6 | 422 | |
cd9adb8b | 423 | void accept(type_visitor& visitor) const final; |
0220be14 JG |
424 | |
425 | const uint64_t length; | |
426 | ||
427 | private: | |
cd9adb8b | 428 | bool _is_equal(const type& base_other) const noexcept final; |
0220be14 JG |
429 | }; |
430 | ||
431 | class dynamic_length_string_type : public string_type { | |
432 | public: | |
433 | dynamic_length_string_type(unsigned int alignment, | |
434 | enum encoding in_encoding, | |
eda1aa02 | 435 | field_location length_field_location); |
b6bbb1d6 | 436 | |
cd9adb8b | 437 | type::cuptr copy() const final; |
b6bbb1d6 | 438 | |
cd9adb8b | 439 | void accept(type_visitor& visitor) const final; |
0220be14 | 440 | |
eda1aa02 | 441 | const field_location length_field_location; |
0220be14 JG |
442 | |
443 | private: | |
cd9adb8b | 444 | bool _is_equal(const type& base_other) const noexcept final; |
0220be14 JG |
445 | }; |
446 | ||
447 | class null_terminated_string_type : public string_type { | |
448 | public: | |
449 | null_terminated_string_type(unsigned int alignment, enum encoding in_encoding); | |
b6bbb1d6 | 450 | |
cd9adb8b | 451 | type::cuptr copy() const final; |
b6bbb1d6 | 452 | |
cd9adb8b | 453 | void accept(type_visitor& visitor) const final; |
0220be14 JG |
454 | }; |
455 | ||
456 | class structure_type : public type { | |
457 | public: | |
458 | using fields = std::vector<field::cuptr>; | |
459 | ||
460 | structure_type(unsigned int alignment, fields in_fields); | |
461 | ||
cd9adb8b | 462 | type::cuptr copy() const final; |
b6bbb1d6 | 463 | |
cd9adb8b | 464 | void accept(type_visitor& visitor) const final; |
0220be14 | 465 | |
da9dd521 | 466 | const fields fields_; |
0220be14 JG |
467 | |
468 | private: | |
cd9adb8b | 469 | bool _is_equal(const type& base_other) const noexcept final; |
0220be14 JG |
470 | }; |
471 | ||
b6bbb1d6 | 472 | template <typename MappingIntegerType> |
0220be14 | 473 | class variant_type : public type { |
45110cdd JG |
474 | static_assert(std::is_same<MappingIntegerType, |
475 | unsigned_enumeration_type::mapping::range_t:: | |
476 | range_integer_t>::value || | |
477 | std::is_same<MappingIntegerType, | |
478 | signed_enumeration_type::mapping::range_t:: | |
479 | range_integer_t>::value, | |
480 | "Variant mapping integer type must be one of those allowed by typed_enumeration_type"); | |
0220be14 | 481 | |
45110cdd JG |
482 | public: |
483 | using choice = std::pair<const details::enumeration_mapping<MappingIntegerType>, type::cuptr>; | |
484 | using choices = std::vector<choice>; | |
485 | ||
486 | variant_type(unsigned int in_alignment, | |
487 | field_location in_selector_field_location, | |
488 | choices in_choices) : | |
489 | type(in_alignment), | |
490 | selector_field_location{std::move(in_selector_field_location)}, | |
da9dd521 | 491 | choices_{std::move(in_choices)} |
45110cdd JG |
492 | { |
493 | } | |
0220be14 | 494 | |
cd9adb8b | 495 | type::cuptr copy() const final |
b6bbb1d6 JG |
496 | { |
497 | choices copy_of_choices; | |
498 | ||
499 | copy_of_choices.reserve(choices_.size()); | |
500 | for (const auto& current_choice : choices_) { | |
501 | copy_of_choices.emplace_back( | |
502 | current_choice.first, current_choice.second->copy()); | |
503 | } | |
504 | ||
505 | return lttng::make_unique<variant_type<MappingIntegerType>>( | |
506 | alignment, selector_field_location, std::move(copy_of_choices)); | |
507 | } | |
508 | ||
cd9adb8b | 509 | void accept(type_visitor& visitor) const final; |
0220be14 | 510 | |
eda1aa02 | 511 | const field_location selector_field_location; |
da9dd521 | 512 | const choices choices_; |
0220be14 JG |
513 | |
514 | private: | |
45110cdd JG |
515 | static bool _choices_are_equal(const choices& a, const choices& b) |
516 | { | |
517 | if (a.size() != b.size()) { | |
518 | return false; | |
519 | } | |
520 | ||
45110cdd JG |
521 | return std::equal(a.cbegin(), a.cend(), b.cbegin(), |
522 | [](const choice& choice_a, const choice& choice_b) { | |
523 | return choice_a.first == choice_b.first && | |
524 | *choice_a.second == *choice_b.second; | |
525 | }); | |
526 | } | |
527 | ||
cd9adb8b | 528 | bool _is_equal(const type& base_other) const noexcept final |
45110cdd JG |
529 | { |
530 | const auto& other = static_cast<decltype(*this)&>(base_other); | |
531 | ||
532 | return selector_field_location == other.selector_field_location && | |
da9dd521 | 533 | _choices_are_equal(choices_, other.choices_); |
45110cdd | 534 | } |
0220be14 JG |
535 | }; |
536 | ||
537 | class field_visitor { | |
538 | public: | |
539 | virtual ~field_visitor() = default; | |
9d89db29 JG |
540 | field_visitor(field_visitor&&) = delete; |
541 | field_visitor(const field_visitor&) = delete; | |
542 | field_visitor& operator=(const field_visitor&) = delete; | |
543 | field_visitor& operator=(field_visitor&&) = delete; | |
544 | ||
0220be14 JG |
545 | virtual void visit(const field& field) = 0; |
546 | ||
547 | protected: | |
548 | field_visitor() = default; | |
549 | }; | |
550 | ||
551 | class type_visitor { | |
552 | public: | |
553 | virtual ~type_visitor() = default; | |
9d89db29 JG |
554 | type_visitor(type_visitor&&) = delete; |
555 | type_visitor(const type_visitor&) = delete; | |
556 | type_visitor& operator=(const type_visitor&) = delete; | |
557 | type_visitor& operator=(type_visitor&&) = delete; | |
558 | ||
0220be14 JG |
559 | virtual void visit(const integer_type& type) = 0; |
560 | virtual void visit(const floating_point_type& type) = 0; | |
561 | virtual void visit(const signed_enumeration_type& type) = 0; | |
562 | virtual void visit(const unsigned_enumeration_type& type) = 0; | |
563 | virtual void visit(const static_length_array_type& type) = 0; | |
564 | virtual void visit(const dynamic_length_array_type& type) = 0; | |
e7360180 JG |
565 | virtual void visit(const static_length_blob_type& type) = 0; |
566 | virtual void visit(const dynamic_length_blob_type& type) = 0; | |
0220be14 JG |
567 | virtual void visit(const null_terminated_string_type& type) = 0; |
568 | virtual void visit(const static_length_string_type& type) = 0; | |
569 | virtual void visit(const dynamic_length_string_type& type) = 0; | |
570 | virtual void visit(const structure_type& type) = 0; | |
45110cdd JG |
571 | virtual void visit(const variant_type<signed_enumeration_type::mapping::range_t::range_integer_t>& type) = 0; |
572 | virtual void visit(const variant_type<unsigned_enumeration_type::mapping::range_t::range_integer_t>& type) = 0; | |
0220be14 JG |
573 | |
574 | protected: | |
575 | type_visitor() = default; | |
576 | }; | |
577 | ||
578 | } /* namespace trace */ | |
579 | } /* namespace sessiond */ | |
580 | } /* namespace lttng */ | |
581 | ||
6e01cdc6 | 582 | /* |
b6bbb1d6 JG |
583 | * Field formatters for libfmt. |
584 | * | |
6e01cdc6 JG |
585 | * Due to a bug in g++ < 7.1, this specialization must be enclosed in the fmt namespace, |
586 | * see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56480. | |
587 | */ | |
588 | namespace fmt { | |
589 | template <> | |
590 | struct formatter<lttng::sessiond::trace::field_location> : formatter<std::string> { | |
31375c42 JG |
591 | template <typename FormatContextType> |
592 | typename FormatContextType::iterator format( | |
593 | const lttng::sessiond::trace::field_location& location, FormatContextType& ctx) | |
6e01cdc6 JG |
594 | { |
595 | std::string location_str{"["}; | |
596 | ||
597 | switch (location.root_) { | |
598 | case lttng::sessiond::trace::field_location::root::PACKET_HEADER: | |
599 | location_str += "\"packet-header\""; | |
600 | break; | |
601 | case lttng::sessiond::trace::field_location::root::PACKET_CONTEXT: | |
602 | location_str += "\"packet-context\""; | |
603 | break; | |
604 | case lttng::sessiond::trace::field_location::root::EVENT_RECORD_HEADER: | |
605 | location_str += "\"event-record-header\""; | |
606 | break; | |
607 | case lttng::sessiond::trace::field_location::root::EVENT_RECORD_COMMON_CONTEXT: | |
608 | location_str += "\"event-record-common-context\""; | |
609 | break; | |
610 | case lttng::sessiond::trace::field_location::root::EVENT_RECORD_SPECIFIC_CONTEXT: | |
611 | location_str += "\"event-record-specific-context\""; | |
612 | break; | |
613 | case lttng::sessiond::trace::field_location::root::EVENT_RECORD_PAYLOAD: | |
614 | location_str += "\"event-record-payload\""; | |
615 | break; | |
616 | } | |
617 | ||
618 | for (const auto &name : location.elements_) { | |
619 | location_str += ", \"" + name + "\""; | |
620 | } | |
621 | ||
622 | location_str += "]"; | |
623 | return format_to(ctx.out(), location_str); | |
624 | } | |
625 | }; | |
b6bbb1d6 JG |
626 | |
627 | namespace details { | |
628 | template <typename MappingIntegerType> | |
629 | ::std::string format_mapping_range(typename lttng::sessiond::trace::typed_enumeration_type< | |
630 | MappingIntegerType>::mapping::range_t range) | |
631 | { | |
632 | if (range.begin == range.end) { | |
633 | return ::fmt::format("[{}]", range.begin); | |
634 | } else { | |
635 | return ::fmt::format("[{}, {}]", range.begin, range.end); | |
636 | } | |
637 | } | |
638 | } /* namespace details */ | |
639 | ||
640 | template <> | |
641 | struct formatter<typename lttng::sessiond::trace::signed_enumeration_type::mapping::range_t> | |
642 | : formatter<std::string> { | |
31375c42 JG |
643 | template <typename FormatContextType> |
644 | typename FormatContextType::iterator | |
b6bbb1d6 | 645 | format(typename lttng::sessiond::trace::signed_enumeration_type::mapping::range_t range, |
31375c42 | 646 | FormatContextType& ctx) |
b6bbb1d6 JG |
647 | { |
648 | return format_to(ctx.out(), | |
649 | details::format_mapping_range< | |
650 | lttng::sessiond::trace::signed_enumeration_type:: | |
651 | mapping::range_t::range_integer_t>( | |
652 | range)); | |
653 | } | |
654 | }; | |
655 | ||
656 | template <> | |
657 | struct formatter<typename lttng::sessiond::trace::unsigned_enumeration_type::mapping::range_t> | |
658 | : formatter<std::string> { | |
31375c42 JG |
659 | template <typename FormatContextType> |
660 | typename FormatContextType::iterator | |
b6bbb1d6 | 661 | format(typename lttng::sessiond::trace::unsigned_enumeration_type::mapping::range_t range, |
31375c42 | 662 | FormatContextType& ctx) |
b6bbb1d6 JG |
663 | { |
664 | return format_to(ctx.out(), | |
665 | details::format_mapping_range< | |
666 | lttng::sessiond::trace::unsigned_enumeration_type:: | |
667 | mapping::range_t::range_integer_t>( | |
668 | range)); | |
669 | } | |
670 | }; | |
671 | ||
6e01cdc6 JG |
672 | } /* namespace fmt */ |
673 | ||
0220be14 | 674 | #endif /* LTTNG_FIELD_H */ |