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2e33ac5a PP |
1 | #ifndef BABELTRACE_CTF_IR_FIELDS_H |
2 | #define BABELTRACE_CTF_IR_FIELDS_H | |
adc315b8 JG |
3 | |
4 | /* | |
2e33ac5a | 5 | * Babeltrace - CTF IR: Event Fields |
adc315b8 | 6 | * |
de9dd397 | 7 | * Copyright 2013, 2014 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
adc315b8 JG |
8 | * |
9 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
10 | * | |
11 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
12 | * of this software and associated documentation files (the "Software"), to deal | |
13 | * in the Software without restriction, including without limitation the rights | |
14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
15 | * copies of the Software, and to permit persons to whom the Software is | |
16 | * furnished to do so, subject to the following conditions: | |
17 | * | |
18 | * The above copyright notice and this permission notice shall be included in | |
19 | * all copies or substantial portions of the Software. | |
20 | * | |
21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
24 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
26 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
27 | * SOFTWARE. | |
28 | * | |
29 | * The Common Trace Format (CTF) Specification is available at | |
30 | * http://www.efficios.com/ctf | |
31 | */ | |
32 | ||
33 | #include <stdint.h> | |
cd95e351 | 34 | #include <stddef.h> |
adc315b8 JG |
35 | |
36 | #ifdef __cplusplus | |
37 | extern "C" { | |
38 | #endif | |
39 | ||
91f379cb PP |
40 | /** |
41 | @defgroup ctfirfields CTF IR fields | |
42 | @ingroup ctfir | |
43 | @brief CTF IR fields. | |
44 | ||
45 | @code | |
46 | #include <babeltrace/ctf-ir/fields.h> | |
47 | @endcode | |
48 | ||
49 | A CTF IR <strong><em>field</em></strong> is an object which holds a | |
50 | concrete value, and which is described by a @ft. | |
51 | ||
52 | In the CTF IR hierarchy, you can set the root fields of two objects: | |
53 | ||
54 | - \ref ctfirpacket | |
55 | - Trace packet header field: bt_ctf_packet_set_header(). | |
56 | - Stream packet context field: bt_ctf_packet_set_context(). | |
57 | - \ref ctfirevent | |
58 | - Stream event header field: bt_ctf_event_set_header(). | |
59 | - Stream event context field: bt_ctf_event_set_stream_event_context(). | |
60 | - Event context field: bt_ctf_event_set_event_context(). | |
61 | - Event payload field: bt_ctf_event_set_payload_field(). | |
62 | ||
63 | There are two categories of fields: | |
64 | ||
65 | - <strong>Basic fields</strong>: | |
66 | - @intfield: contains an integral value. | |
67 | - @floatfield: contains a floating point number value. | |
68 | - @enumfield: contains an integer field which contains an integral | |
69 | value. | |
70 | - @stringfield: contains a string value. | |
71 | - <strong>Compound fields</strong>: | |
72 | - @structfield: contains an ordered list of named fields | |
73 | (possibly with different @fts). | |
74 | - @arrayfield: contains an ordered list of fields which share | |
75 | the same field type. | |
76 | - @seqfield: contains an ordered list of fields which share | |
77 | the same field type. | |
78 | - @varfield: contains a single, current field. | |
79 | ||
80 | You can create a field object from a @ft object with | |
81 | bt_ctf_field_create(). The enumeration and compound fields create their | |
82 | contained fields with the following getters if such fields do not exist | |
83 | yet: | |
84 | ||
85 | - bt_ctf_field_enumeration_get_container() | |
86 | - bt_ctf_field_structure_get_field() | |
87 | - bt_ctf_field_array_get_field() | |
88 | - bt_ctf_field_sequence_get_field() | |
89 | - bt_ctf_field_variant_get_field() | |
90 | ||
91 | You can get a reference to the @ft which was used to create a field with | |
92 | bt_ctf_field_get_type(). You can get the | |
93 | \link #bt_ctf_type_id type ID\endlink of this field type directly with | |
94 | bt_ctf_field_get_type_id(). | |
95 | ||
96 | You can get a deep copy of a field with bt_ctf_field_copy(). The field | |
97 | copy, and its contained field copies if it's the case, have the same | |
98 | field type as the originals. | |
99 | ||
100 | As with any Babeltrace object, CTF IR field objects have | |
101 | <a href="https://en.wikipedia.org/wiki/Reference_counting">reference | |
102 | counts</a>. See \ref refs to learn more about the reference counting | |
103 | management of Babeltrace objects. | |
104 | ||
105 | The functions which freeze CTF IR \link ctfirpacket packet\endlink and | |
106 | \link ctfirevent event\endlink objects also freeze their root field | |
107 | objects. You cannot modify a frozen field object: it is considered | |
108 | immutable, except for \link refs reference counting\endlink. | |
109 | ||
110 | @sa ctfirfieldtypes | |
111 | ||
112 | @file | |
113 | @brief CTF IR fields type and functions. | |
114 | @sa ctfirfields | |
115 | ||
116 | @addtogroup ctfirfields | |
117 | @{ | |
118 | */ | |
119 | ||
120 | /** | |
121 | @struct bt_ctf_field | |
122 | @brief A CTF IR field. | |
123 | @sa ctfirfields | |
124 | */ | |
125 | struct bt_ctf_field; | |
adc315b8 JG |
126 | struct bt_ctf_event_class; |
127 | struct bt_ctf_event; | |
adc315b8 | 128 | struct bt_ctf_field_type; |
e0f15669 | 129 | struct bt_ctf_field_type_enumeration_mapping_iterator; |
adc315b8 | 130 | |
91f379cb PP |
131 | /** |
132 | @name Creation and parent field type access functions | |
133 | @{ | |
134 | */ | |
135 | ||
136 | /** | |
137 | @brief Creates an uninitialized @field described by the @ft | |
138 | \p field_type. | |
139 | ||
140 | On success, \p field_type becomes the parent of the created field | |
141 | object. | |
142 | ||
143 | On success, this function creates an \em uninitialized field: it has | |
144 | no value. You need to set the value of the created field with one of the | |
145 | its specific setters. | |
146 | ||
147 | @param[in] field_type Field type which describes the field to create. | |
148 | @returns Created field object, or \c NULL on error. | |
149 | ||
150 | @prenotnull{field_type} | |
151 | @postsuccessrefcountret1 | |
152 | @postsuccessfrozen{field_type} | |
153 | */ | |
adc315b8 | 154 | extern struct bt_ctf_field *bt_ctf_field_create( |
91f379cb | 155 | struct bt_ctf_field_type *field_type); |
adc315b8 | 156 | |
91f379cb PP |
157 | /** |
158 | @brief Returns the parent @ft of the @field \p field. | |
adc315b8 | 159 | |
91f379cb PP |
160 | This function returns a reference to the field type which was used to |
161 | create the field object in the first place with bt_ctf_field_create(). | |
cd95e351 | 162 | |
91f379cb PP |
163 | @param[in] field Field of which to get the parent field type. |
164 | @returns Parent field type of \p event, | |
165 | or \c NULL on error. | |
adc315b8 | 166 | |
91f379cb PP |
167 | @prenotnull{field} |
168 | @postrefcountsame{field} | |
169 | @postsuccessrefcountretinc | |
170 | */ | |
171 | extern struct bt_ctf_field_type *bt_ctf_field_get_type( | |
172 | struct bt_ctf_field *field); | |
cd95e351 | 173 | |
91f379cb | 174 | /** @} */ |
adc315b8 | 175 | |
91f379cb PP |
176 | /** |
177 | @name Type information | |
178 | @{ | |
179 | */ | |
adc315b8 | 180 | |
91f379cb PP |
181 | /** |
182 | @brief Returns the type ID of the @ft of the @field \p field. | |
adc315b8 | 183 | |
91f379cb PP |
184 | @param[in] field Field of which to get the type ID of its |
185 | parent field type.. | |
186 | @returns Type ID of the parent field type of \p field, | |
187 | or #BT_CTF_TYPE_ID_UNKNOWN on error. | |
3f4a108d | 188 | |
91f379cb PP |
189 | @prenotnull{field} |
190 | @postrefcountsame{field} | |
f78d67fb | 191 | |
91f379cb PP |
192 | @sa #bt_ctf_type_id: CTF IR field type ID. |
193 | @sa bt_ctf_field_is_integer(): Returns whether or not a given field is a | |
194 | @intfield. | |
195 | @sa bt_ctf_field_is_floating_point(): Returns whether or not a given | |
196 | field is a @floatfield. | |
197 | @sa bt_ctf_field_is_enumeration(): Returns whether or not a given field | |
198 | is a @enumfield. | |
199 | @sa bt_ctf_field_is_string(): Returns whether or not a given field is a | |
200 | @stringfield. | |
201 | @sa bt_ctf_field_is_structure(): Returns whether or not a given field is | |
202 | a @structfield. | |
203 | @sa bt_ctf_field_is_array(): Returns whether or not a given field is a | |
204 | @arrayfield. | |
205 | @sa bt_ctf_field_is_sequence(): Returns whether or not a given field is | |
206 | a @seqfield. | |
207 | @sa bt_ctf_field_is_variant(): Returns whether or not a given field is a | |
208 | @varfield. | |
209 | */ | |
210 | extern enum bt_ctf_type_id bt_ctf_field_get_type_id(struct bt_ctf_field *field); | |
adc315b8 | 211 | |
96e8f959 MD |
212 | /* |
213 | * bt_ctf_field_signed_integer_get_value: get a signed integer field's value | |
214 | * | |
215 | * Get a signed integer field's value. | |
216 | * | |
217 | * @param integer Signed integer field instance. | |
218 | * @param value Pointer to a signed integer where the value will be stored. | |
219 | * | |
220 | * Returns 0 on success, a negative value on error. | |
221 | */ | |
222 | extern int bt_ctf_field_signed_integer_get_value(struct bt_ctf_field *integer, | |
223 | int64_t *value); | |
224 | ||
91f379cb PP |
225 | /** |
226 | @brief Returns whether or not the @field \p field is a @intfield. | |
cd95e351 | 227 | |
91f379cb PP |
228 | @param[in] field Field to check (can be \c NULL). |
229 | @returns 1 if \p field is an integer field, or 0 | |
230 | otherwise (including if \p field is | |
231 | \c NULL). | |
cd95e351 | 232 | |
91f379cb PP |
233 | @prenotnull{field} |
234 | @postrefcountsame{field} | |
adc315b8 | 235 | |
91f379cb PP |
236 | @sa bt_ctf_field_get_type_id(): Returns the type ID of a given |
237 | field's type. | |
238 | */ | |
239 | extern int bt_ctf_field_is_integer(struct bt_ctf_field *field); | |
cd95e351 | 240 | |
91f379cb PP |
241 | /** |
242 | @brief Returns whether or not the @field \p field is a @floatfield. | |
adc315b8 | 243 | |
91f379cb PP |
244 | @param[in] field Field to check (can be \c NULL). |
245 | @returns 1 if \p field is a floating point number field, | |
246 | or 0 otherwise (including if \p field is | |
247 | \c NULL). | |
248 | ||
249 | @prenotnull{field} | |
250 | @postrefcountsame{field} | |
251 | ||
252 | @sa bt_ctf_field_get_type_id(): Returns the type ID of a given | |
253 | field's type. | |
254 | */ | |
255 | extern int bt_ctf_field_is_floating_point(struct bt_ctf_field *field); | |
256 | ||
257 | /** | |
258 | @brief Returns whether or not the @field \p field is a @enumfield. | |
259 | ||
260 | @param[in] field Field to check (can be \c NULL). | |
261 | @returns 1 if \p field is an enumeration field, or 0 | |
262 | otherwise (including if \p field is | |
263 | \c NULL). | |
264 | ||
265 | @prenotnull{field} | |
266 | @postrefcountsame{field} | |
267 | ||
268 | @sa bt_ctf_field_get_type_id(): Returns the type ID of a given | |
269 | field's type. | |
270 | */ | |
271 | extern int bt_ctf_field_is_enumeration(struct bt_ctf_field *field); | |
272 | ||
273 | /** | |
274 | @brief Returns whether or not the @field \p field is a @stringfield. | |
275 | ||
276 | @param[in] field Field to check (can be \c NULL). | |
277 | @returns 1 if \p field is a string field, or 0 | |
278 | otherwise (including if \p field is | |
279 | \c NULL). | |
280 | ||
281 | @prenotnull{field} | |
282 | @postrefcountsame{field} | |
283 | ||
284 | @sa bt_ctf_field_get_type_id(): Returns the type ID of a given | |
285 | field's type. | |
286 | */ | |
287 | extern int bt_ctf_field_is_string(struct bt_ctf_field *field); | |
288 | ||
289 | /** | |
290 | @brief Returns whether or not the @field \p field is a @structfield. | |
291 | ||
292 | @param[in] field Field to check (can be \c NULL). | |
293 | @returns 1 if \p field is a structure field, or 0 | |
294 | otherwise (including if \p field is | |
295 | \c NULL). | |
296 | ||
297 | @prenotnull{field} | |
298 | @postrefcountsame{field} | |
299 | ||
300 | @sa bt_ctf_field_get_type_id(): Returns the type ID of a given | |
301 | field's type. | |
302 | */ | |
303 | extern int bt_ctf_field_is_structure(struct bt_ctf_field *field); | |
304 | ||
305 | /** | |
306 | @brief Returns whether or not the @field \p field is a @arrayfield. | |
307 | ||
308 | @param[in] field Field to check (can be \c NULL). | |
309 | @returns 1 if \p field is an array field, or 0 | |
310 | otherwise (including if \p field is | |
311 | \c NULL). | |
312 | ||
313 | @prenotnull{field} | |
314 | @postrefcountsame{field} | |
315 | ||
316 | @sa bt_ctf_field_get_type_id(): Returns the type ID of a given | |
317 | field's type. | |
318 | */ | |
319 | extern int bt_ctf_field_is_array(struct bt_ctf_field *field); | |
320 | ||
321 | /** | |
322 | @brief Returns whether or not the @field \p field is a @seqfield. | |
323 | ||
324 | @param[in] field Field to check (can be \c NULL). | |
325 | @returns 1 if \p field is a sequence field, or 0 | |
326 | otherwise (including if \p field is | |
327 | \c NULL). | |
328 | ||
329 | @prenotnull{field} | |
330 | @postrefcountsame{field} | |
331 | ||
332 | @sa bt_ctf_field_get_type_id(): Returns the type ID of a given | |
333 | field's type. | |
334 | */ | |
335 | extern int bt_ctf_field_is_sequence(struct bt_ctf_field *field); | |
336 | ||
337 | /** | |
338 | @brief Returns whether or not the @field \p field is a @varfield. | |
339 | ||
340 | @param[in] field Field to check (can be \c NULL). | |
341 | @returns 1 if \p field is a variant field, or 0 | |
342 | otherwise (including if \p field is | |
343 | \c NULL). | |
344 | ||
345 | @prenotnull{field} | |
346 | @postrefcountsame{field} | |
347 | ||
348 | @sa bt_ctf_field_get_type_id(): Returns the type ID of a given | |
349 | field's type. | |
350 | */ | |
351 | extern int bt_ctf_field_is_variant(struct bt_ctf_field *field); | |
352 | ||
353 | /** @} */ | |
354 | ||
355 | /** | |
356 | @name Misc. functions | |
357 | @{ | |
358 | */ | |
359 | ||
360 | /** | |
361 | @brief Creates a \em deep copy of the @field \p field. | |
362 | ||
363 | You can copy a frozen field: the resulting copy is <em>not frozen</em>. | |
364 | ||
365 | @param[in] field Field to copy. | |
366 | @returns Deep copy of \p field on success, | |
367 | or \c NULL on error. | |
368 | ||
369 | @prenotnull{field} | |
370 | @postrefcountsame{field} | |
371 | @postsuccessrefcountret1 | |
372 | @post <strong>On success</strong>, the returned field is not frozen. | |
373 | */ | |
374 | extern struct bt_ctf_field *bt_ctf_field_copy(struct bt_ctf_field *field); | |
375 | ||
376 | /** @} */ | |
377 | ||
378 | /** @} */ | |
379 | ||
380 | /** | |
381 | @defgroup ctfirintfield CTF IR integer field | |
382 | @ingroup ctfirfields | |
383 | @brief CTF IR integer field. | |
384 | ||
385 | @code | |
386 | #include <babeltrace/ctf-ir/fields.h> | |
387 | @endcode | |
388 | ||
389 | A CTF IR <strong><em>integer field</em></strong> is a @field which | |
390 | holds a signed or unsigned integral value, and which is described by | |
391 | a @intft. | |
392 | ||
393 | An integer field object is considered \em unsigned if | |
394 | bt_ctf_field_type_integer_get_signed() on its parent field type returns | |
395 | 0. Otherwise it is considered \em signed. You \em must use | |
396 | bt_ctf_field_unsigned_integer_get_value() and | |
397 | bt_ctf_field_unsigned_integer_set_value() with an unsigned integer | |
398 | field, and bt_ctf_field_signed_integer_get_value() and | |
399 | bt_ctf_field_signed_integer_set_value() with a signed integer field. | |
400 | ||
401 | After you create an integer field with bt_ctf_field_create(), you | |
402 | \em must set an integral value with | |
403 | bt_ctf_field_unsigned_integer_set_value() or | |
404 | bt_ctf_field_signed_integer_set_value() before you can get the | |
405 | field's value with bt_ctf_field_unsigned_integer_get_value() or | |
406 | bt_ctf_field_signed_integer_get_value(). | |
407 | ||
408 | @sa ctfirintfieldtype | |
409 | @sa ctfirfields | |
410 | ||
411 | @addtogroup ctfirintfield | |
412 | @{ | |
413 | */ | |
414 | ||
415 | /** | |
416 | @brief Returns the signed integral value of the @intfield | |
417 | \p integer_field. | |
418 | ||
419 | @param[in] integer_field Integer field of which to get the | |
420 | signed integral value. | |
421 | @param[out] value Returned signed integral value of | |
422 | \p integer_field. | |
423 | @returns 0 on success, or a negative value on | |
424 | error, including if \p integer_field | |
425 | has no integral value yet. | |
426 | ||
427 | @prenotnull{integer_field} | |
428 | @prenotnull{value} | |
429 | @preisintfield{integer_field} | |
430 | @pre bt_ctf_field_type_integer_get_signed() returns 1 for the parent | |
431 | @ft of \p integer_field. | |
432 | @pre \p integer_field contains a signed integral value previously | |
433 | set with bt_ctf_field_signed_integer_set_value(). | |
434 | @postrefcountsame{integer_field} | |
435 | ||
436 | @sa bt_ctf_field_signed_integer_set_value(): Sets the signed integral | |
437 | value of a given integer field. | |
438 | */ | |
439 | extern int bt_ctf_field_signed_integer_get_value( | |
440 | struct bt_ctf_field *integer_field, int64_t *value); | |
441 | ||
442 | /** | |
443 | @brief Sets the signed integral value of the @intfield | |
444 | \p integer_field to \p value. | |
445 | ||
446 | @param[in] integer_field Integer field of which to set | |
447 | the signed integral value. | |
448 | @param[in] value New signed integral value of | |
449 | \p integer_field. | |
450 | @returns 0 on success, or a negative value on error. | |
451 | ||
452 | @prenotnull{integer_field} | |
453 | @preisintfield{integer_field} | |
454 | @prehot{integer_field} | |
455 | @pre bt_ctf_field_type_integer_get_signed() returns 1 for the parent | |
456 | @ft of \p integer_field. | |
457 | @postrefcountsame{integer_field} | |
458 | ||
459 | @sa bt_ctf_field_signed_integer_get_value(): Returns the signed integral | |
460 | value of a given integer field. | |
461 | */ | |
462 | extern int bt_ctf_field_signed_integer_set_value( | |
463 | struct bt_ctf_field *integer_field, int64_t value); | |
464 | ||
465 | /** | |
466 | @brief Returns the unsigned integral value of the @intfield | |
467 | \p integer_field. | |
468 | ||
469 | @param[in] integer_field Integer field of which to get the | |
470 | unsigned integral value. | |
471 | @param[out] value Returned unsigned integral value of | |
472 | \p integer_field. | |
473 | @returns 0 on success, or a negative value on | |
474 | error, including if \p integer_field | |
475 | has no integral value yet. | |
476 | ||
477 | @prenotnull{integer_field} | |
478 | @prenotnull{value} | |
479 | @preisintfield{integer_field} | |
480 | @pre bt_ctf_field_type_integer_get_signed() returns 0 for the parent | |
481 | @ft of \p integer_field. | |
482 | @pre \p integer_field contains an unsigned integral value previously | |
483 | set with bt_ctf_field_unsigned_integer_set_value(). | |
484 | @postrefcountsame{integer_field} | |
485 | ||
486 | @sa bt_ctf_field_unsigned_integer_set_value(): Sets the unsigned | |
487 | integral value of a given integer field. | |
488 | */ | |
489 | extern int bt_ctf_field_unsigned_integer_get_value( | |
490 | struct bt_ctf_field *integer_field, uint64_t *value); | |
491 | ||
492 | /** | |
493 | @brief Sets the unsigned integral value of the @intfield | |
494 | \p integer_field to \p value. | |
495 | ||
496 | @param[in] integer_field Integer field of which to set | |
497 | the unsigned integral value. | |
498 | @param[in] value New unsigned integral value of | |
499 | \p integer_field. | |
500 | @returns 0 on success, or a negative value on error. | |
501 | ||
502 | @prenotnull{integer_field} | |
503 | @preisintfield{integer_field} | |
504 | @prehot{integer_field} | |
505 | @pre bt_ctf_field_type_integer_get_signed() returns 0 for the parent | |
506 | @ft of \p integer_field. | |
507 | @postrefcountsame{integer_field} | |
508 | ||
509 | @sa bt_ctf_field_unsigned_integer_get_value(): Returns the unsigned | |
510 | integral value of a given integer field. | |
511 | */ | |
512 | extern int bt_ctf_field_unsigned_integer_set_value( | |
513 | struct bt_ctf_field *integer_field, uint64_t value); | |
514 | ||
515 | /** @} */ | |
516 | ||
517 | /** | |
518 | @defgroup ctfirfloatfield CTF IR floating point number field | |
519 | @ingroup ctfirfields | |
520 | @brief CTF IR floating point number field. | |
521 | ||
522 | @code | |
523 | #include <babeltrace/ctf-ir/fields.h> | |
524 | @endcode | |
525 | ||
526 | A CTF IR <strong><em>floating point number field</em></strong> is a | |
527 | @field which holds a floating point number value, and which is | |
528 | described by a @floatft. | |
529 | ||
530 | After you create a floating point number field with bt_ctf_field_create(), you | |
531 | \em must set a floating point number value with | |
532 | bt_ctf_field_floating_point_set_value() before you can get the | |
533 | field's value with bt_ctf_field_floating_point_get_value(). | |
534 | ||
535 | @sa ctfirfloatfieldtype | |
536 | @sa ctfirfields | |
537 | ||
538 | @addtogroup ctfirfloatfield | |
539 | @{ | |
540 | */ | |
541 | ||
542 | /** | |
543 | @brief Returns the floating point number value of the @floatfield | |
544 | \p float_field. | |
545 | ||
546 | @param[in] float_field Floating point number field of which to get the | |
547 | floating point number value. | |
548 | @param[out] value Returned floating point number value of | |
549 | \p float_field. | |
550 | @returns 0 on success, or a negative value on error, | |
551 | including if \p float_field has no floating | |
552 | point number value yet. | |
553 | ||
554 | @prenotnull{float_field} | |
555 | @prenotnull{value} | |
556 | @preisfloatfield{float_field} | |
557 | @pre \p float_field contains a floating point number value previously | |
558 | set with bt_ctf_field_floating_point_set_value(). | |
559 | @postrefcountsame{float_field} | |
560 | ||
561 | @sa bt_ctf_field_floating_point_set_value(): Sets the floating point | |
562 | number value of a given floating point number field. | |
563 | */ | |
cd95e351 | 564 | extern int bt_ctf_field_floating_point_get_value( |
91f379cb | 565 | struct bt_ctf_field *float_field, double *value); |
cd95e351 | 566 | |
91f379cb PP |
567 | /** |
568 | @brief Sets the floating point number value of the @floatfield | |
569 | \p float_field to \p value. | |
570 | ||
571 | @param[in] float_field Floating point number field of which to set | |
572 | the floating point number value. | |
573 | @param[in] value New floating point number value of | |
574 | \p float_field. | |
575 | @returns 0 on success, or a negative value on error. | |
576 | ||
577 | @prenotnull{float_field} | |
578 | @preisfloatfield{float_field} | |
579 | @prehot{float_field} | |
580 | @postrefcountsame{float_field} | |
581 | ||
582 | @sa bt_ctf_field_floating_point_get_value(): Returns the floating point | |
583 | number value of a given floating point number field. | |
584 | */ | |
adc315b8 | 585 | extern int bt_ctf_field_floating_point_set_value( |
91f379cb | 586 | struct bt_ctf_field *float_field, |
adc315b8 JG |
587 | double value); |
588 | ||
91f379cb PP |
589 | /** @} */ |
590 | ||
591 | /** | |
592 | @defgroup ctfirenumfield CTF IR enumeration field | |
593 | @ingroup ctfirfields | |
594 | @brief CTF IR enumeration field. | |
595 | ||
596 | @code | |
597 | #include <babeltrace/ctf-ir/fields.h> | |
598 | @endcode | |
599 | ||
600 | A CTF IR <strong><em>enumeration field</em></strong> is a @field which | |
601 | holds a @intfield, and which is described by a @enumft. | |
602 | ||
603 | To set the current integral value of an enumeration field, you need to | |
604 | get its wrapped @intfield with bt_ctf_field_enumeration_get_container(), | |
605 | and then set the integral value with either | |
606 | bt_ctf_field_signed_integer_set_value() or | |
607 | bt_ctf_field_unsigned_integer_set_value(). | |
608 | ||
609 | Once you set the integral value of an enumeration field by following the | |
e0f15669 | 610 | previous paragraph, you can get the names of the mappings containing this |
91f379cb | 611 | value in the enumeration field with |
e0f15669 | 612 | bt_ctf_field_enumeration_get_mappings(). |
91f379cb PP |
613 | |
614 | @sa ctfirenumfieldtype | |
615 | @sa ctfirfields | |
616 | ||
617 | @addtogroup ctfirenumfield | |
618 | @{ | |
619 | */ | |
620 | ||
621 | /** | |
622 | @brief Returns the @intfield, potentially creating it, wrapped by the | |
623 | @enumfield \p enum_field. | |
624 | ||
625 | This function creates the @intfield to return if it does not currently | |
626 | exist. | |
627 | ||
628 | @param[in] enum_field Enumeration field of which to get the wrapped | |
629 | integer field. | |
630 | @returns Integer field wrapped by \p enum_field, or | |
631 | \c NULL on error. | |
632 | ||
633 | @prenotnull{enum_field} | |
634 | @preisenumfield{enum_field} | |
635 | @postrefcountsame{enum_field} | |
636 | @postsuccessrefcountretinc | |
637 | */ | |
638 | extern struct bt_ctf_field *bt_ctf_field_enumeration_get_container( | |
639 | struct bt_ctf_field *enum_field); | |
640 | ||
641 | /** | |
8dc7eb94 | 642 | @brief Returns a @enumiter to the mappings selected by the current |
e0f15669 | 643 | integral value of the @enumfield \p enum_field. |
91f379cb | 644 | |
91f379cb PP |
645 | @param[in] enum_field Enumeration field of which to get the name of |
646 | mapping associated to its current integral | |
647 | value. | |
e0f15669 JG |
648 | @returns An iterator to the mappings associated to the |
649 | current integral value of \p enum_field, or | |
650 | \c NULL on error. | |
91f379cb PP |
651 | |
652 | @prenotnull{enum_field} | |
653 | @preisenumfield{enum_field} | |
654 | @pre The wrapped integer field of \p enum_field contains an integral | |
655 | value. | |
656 | @postrefcountsame{enum_field} | |
8dc7eb94 | 657 | @postsuccessrefcountret1 |
91f379cb | 658 | */ |
e0f15669 JG |
659 | extern struct bt_ctf_field_type_enumeration_mapping_iterator * |
660 | bt_ctf_field_enumeration_get_mappings(struct bt_ctf_field *enum_field); | |
91f379cb PP |
661 | |
662 | /** @} */ | |
663 | ||
664 | /** | |
665 | @defgroup ctfirstringfield CTF IR string field | |
666 | @ingroup ctfirfields | |
667 | @brief CTF IR string field. | |
668 | ||
669 | @code | |
670 | #include <babeltrace/ctf-ir/fields.h> | |
671 | @endcode | |
672 | ||
673 | A CTF IR <strong><em>string field</em></strong> is a @field which holds | |
674 | a string value, and which is described by a @stringft. | |
675 | ||
676 | Use bt_ctf_field_string_set_value() to set the current string value | |
677 | of a string field object. You can also use bt_ctf_field_string_append() | |
678 | and bt_ctf_field_string_append_len() to append a string to the current | |
679 | value of a string field. | |
680 | ||
681 | After you create a string field with bt_ctf_field_create(), you | |
682 | \em must set a string value with | |
683 | bt_ctf_field_string_set_value(), bt_ctf_field_string_append(), or | |
684 | bt_ctf_field_string_append_len() before you can get the | |
685 | field's value with bt_ctf_field_string_get_value(). | |
686 | ||
687 | @sa ctfirstringfieldtype | |
688 | @sa ctfirfields | |
689 | ||
690 | @addtogroup ctfirstringfield | |
691 | @{ | |
692 | */ | |
693 | ||
694 | /** | |
695 | @brief Returns the string value of the @stringfield \p string_field. | |
696 | ||
697 | On success, \p string_field remains the sole owner of the returned | |
698 | value. | |
699 | ||
700 | @param[in] string_field String field field of which to get the | |
701 | string value. | |
702 | @returns String value, or \c NULL on error. | |
703 | ||
704 | @prenotnull{string_field} | |
705 | @prenotnull{value} | |
706 | @preisstringfield{string_field} | |
707 | @pre \p string_field contains a string value previously | |
708 | set with bt_ctf_field_string_set_value(), | |
709 | bt_ctf_field_string_append(), or | |
710 | bt_ctf_field_string_append_len(). | |
711 | @postrefcountsame{string_field} | |
712 | ||
713 | @sa bt_ctf_field_string_set_value(): Sets the string value of a given | |
714 | string field. | |
715 | */ | |
cd95e351 JG |
716 | extern const char *bt_ctf_field_string_get_value( |
717 | struct bt_ctf_field *string_field); | |
718 | ||
91f379cb PP |
719 | /** |
720 | @brief Sets the string value of the @stringfield \p string_field to | |
721 | \p value. | |
722 | ||
723 | @param[in] string_field String field of which to set | |
724 | the string value. | |
725 | @param[in] value New string value of \p string_field (copied | |
726 | on success). | |
727 | @returns 0 on success, or a negative value on error. | |
728 | ||
729 | @prenotnull{string_field} | |
730 | @prenotnull{value} | |
731 | @preisstringfield{string_field} | |
732 | @prehot{string_field} | |
733 | @postrefcountsame{string_field} | |
734 | ||
735 | @sa bt_ctf_field_string_get_value(): Returns the string value of a | |
736 | given string field. | |
737 | */ | |
cd95e351 | 738 | extern int bt_ctf_field_string_set_value(struct bt_ctf_field *string_field, |
adc315b8 JG |
739 | const char *value); |
740 | ||
91f379cb PP |
741 | /** |
742 | @brief Appends the string \p value to the current string value of | |
743 | the @stringfield \p string_field. | |
744 | ||
745 | This function is the equivalent of: | |
746 | ||
747 | @code | |
748 | bt_ctf_field_string_append_len(string_field, value, strlen(value)); | |
749 | @endcode | |
750 | ||
751 | @param[in] string_field String field of which to append \p value to | |
752 | its current value. | |
753 | @param[in] value String to append to the current string value | |
754 | of \p string_field (copied on success). | |
755 | @returns 0 on success, or a negative value on error. | |
756 | ||
757 | @prenotnull{string_field} | |
758 | @prenotnull{value} | |
759 | @preisstringfield{string_field} | |
760 | @prehot{string_field} | |
761 | @postrefcountsame{string_field} | |
762 | ||
763 | @sa bt_ctf_field_string_set_value(): Sets the string value of a given | |
764 | string field. | |
765 | */ | |
c6f9c5a3 PP |
766 | extern int bt_ctf_field_string_append(struct bt_ctf_field *string_field, |
767 | const char *value); | |
768 | ||
91f379cb PP |
769 | /** |
770 | @brief Appends the first \p length characters of \p value to the | |
771 | current string value of the @stringfield \p string_field. | |
772 | ||
773 | If \p string_field has no current string value, this function first | |
774 | sets an empty string as the string value of \p string_field and then | |
775 | appends the first \p length characters of \p value. | |
776 | ||
777 | @param[in] string_field String field of which to append the first | |
778 | \p length characters of \p value to | |
779 | its current value. | |
780 | @param[in] value String containing the characters to append to | |
781 | the current string value of \p string_field | |
782 | (copied on success). | |
783 | @param[in] length Number of characters of \p value to append to | |
784 | the current string value of \p string_field. | |
785 | @returns 0 on success, or a negative value on error. | |
786 | ||
787 | @prenotnull{string_field} | |
788 | @prenotnull{value} | |
789 | @preisstringfield{string_field} | |
790 | @prehot{string_field} | |
791 | @postrefcountsame{string_field} | |
792 | ||
793 | @sa bt_ctf_field_string_set_value(): Sets the string value of a given | |
794 | string field. | |
795 | */ | |
f98c6554 PP |
796 | extern int bt_ctf_field_string_append_len( |
797 | struct bt_ctf_field *string_field, const char *value, | |
798 | unsigned int length); | |
799 | ||
91f379cb | 800 | /** @} */ |
cd95e351 | 801 | |
91f379cb PP |
802 | /** |
803 | @defgroup ctfirstructfield CTF IR structure field | |
804 | @ingroup ctfirfields | |
805 | @brief CTF IR structure field. | |
4ebcc695 | 806 | |
91f379cb PP |
807 | @code |
808 | #include <babeltrace/ctf-ir/fields.h> | |
809 | @endcode | |
8f3553be | 810 | |
91f379cb PP |
811 | A CTF IR <strong><em>structure field</em></strong> is a @field which |
812 | contains an ordered list of zero or more named @fields which can be | |
813 | different @fts, and which is described by a @structft. | |
8f3553be | 814 | |
91f379cb PP |
815 | To set the value of a specific field of a structure field, you need to |
816 | first get the field with bt_ctf_field_structure_get_field() or | |
817 | bt_ctf_field_structure_get_field_by_index(). | |
8f3553be | 818 | |
91f379cb PP |
819 | @sa ctfirstructfieldtype |
820 | @sa ctfirfields | |
8f3553be | 821 | |
91f379cb PP |
822 | @addtogroup ctfirstructfield |
823 | @{ | |
824 | */ | |
8f3553be | 825 | |
91f379cb PP |
826 | /** |
827 | @brief Returns the @field named \p name, potentially creating it, | |
828 | in the @structfield \p struct_field. | |
8f3553be | 829 | |
91f379cb PP |
830 | This function creates the @field to return if it does not currently |
831 | exist. | |
8f3553be | 832 | |
91f379cb PP |
833 | @param[in] struct_field Structure field of which to get the field |
834 | named \p name. | |
835 | @param[in] name Name of the field to get from \p struct_field. | |
836 | @returns Field named \p name in \p struct_field, or | |
837 | \c NULL on error. | |
8f3553be | 838 | |
91f379cb PP |
839 | @prenotnull{struct_field} |
840 | @prenotnull{name} | |
841 | @preisstructfield{struct_field} | |
842 | @postrefcountsame{struct_field} | |
843 | @postsuccessrefcountretinc | |
844 | ||
845 | @sa bt_ctf_field_structure_get_field_by_index(): Returns the field of a | |
846 | given structure field by index. | |
847 | */ | |
848 | extern struct bt_ctf_field *bt_ctf_field_structure_get_field( | |
849 | struct bt_ctf_field *struct_field, const char *name); | |
850 | ||
851 | /** | |
852 | @brief Returns the @field at index \p index in the @structfield | |
853 | \p struct_field. | |
854 | ||
855 | @param[in] struct_field Structure field of which to get the field | |
856 | at index \p index. | |
857 | @param[in] index Index of the field to get in \p struct_field. | |
858 | @returns Field at index \p index in \p struct_field, or | |
859 | \c NULL on error. | |
860 | ||
861 | @prenotnull{struct_field} | |
862 | @preisstructfield{struct_field} | |
863 | @pre \p index is lesser than the number of fields contained in the | |
864 | parent field type of \p struct_field (see | |
865 | bt_ctf_field_type_structure_get_field_count()). | |
866 | @postrefcountsame{struct_field} | |
867 | @postsuccessrefcountretinc | |
868 | ||
869 | @sa bt_ctf_field_structure_get_field(): Returns the field of a | |
870 | given structure field by name. | |
871 | */ | |
872 | extern struct bt_ctf_field *bt_ctf_field_structure_get_field_by_index( | |
873 | struct bt_ctf_field *struct_field, int index); | |
874 | ||
875 | /** @} */ | |
876 | ||
877 | /** | |
878 | @defgroup ctfirarrayfield CTF IR array field | |
879 | @ingroup ctfirfields | |
880 | @brief CTF IR array field. | |
881 | ||
882 | @code | |
883 | #include <babeltrace/ctf-ir/fields.h> | |
884 | @endcode | |
885 | ||
886 | A CTF IR <strong><em>array field</em></strong> is a @field which | |
887 | contains an ordered list of zero or more @fields sharing the same @ft, | |
888 | and which is described by a @arrayft. | |
889 | ||
890 | To set the value of a specific field of an array field, you need to | |
891 | first get the field with bt_ctf_field_array_get_field(). | |
892 | ||
893 | @sa ctfirarrayfieldtype | |
894 | @sa ctfirfields | |
895 | ||
896 | @addtogroup ctfirarrayfield | |
897 | @{ | |
898 | */ | |
899 | ||
900 | /** | |
901 | @brief Returns the @field at index \p index, potentially creating it, | |
902 | in the @arrayfield \p array_field. | |
903 | ||
904 | This function creates the @field to return if it does not currently | |
905 | exist. | |
906 | ||
907 | @param[in] array_field Array field of which to get the field | |
908 | at index \p index. | |
909 | @param[in] index Index of the field to get in \p array_field. | |
910 | @returns Field at index \p index in \p array_field, or | |
911 | \c NULL on error. | |
912 | ||
913 | @prenotnull{array_field} | |
914 | @preisarrayfield{array_field} | |
915 | @pre \p index is lesser than bt_ctf_field_type_array_get_length() called | |
916 | on the field type of \p array_field. | |
917 | @postrefcountsame{array_field} | |
918 | @postsuccessrefcountretinc | |
919 | */ | |
920 | extern struct bt_ctf_field *bt_ctf_field_array_get_field( | |
921 | struct bt_ctf_field *array_field, uint64_t index); | |
922 | ||
923 | /** @} */ | |
924 | ||
925 | /** | |
926 | @defgroup ctfirseqfield CTF IR sequence field | |
927 | @ingroup ctfirfields | |
928 | @brief CTF IR sequence field. | |
929 | ||
930 | @code | |
931 | #include <babeltrace/ctf-ir/fields.h> | |
932 | @endcode | |
933 | ||
934 | A CTF IR <strong><em>sequence field</em></strong> is a @field which | |
935 | contains an ordered list of zero or more @fields sharing the same @ft, | |
936 | and which is described by a @seqft. | |
937 | ||
938 | Before you can get a specific field of a sequence field with | |
939 | bt_ctf_field_sequence_get_field(), you need to set its current length | |
940 | @intfield with bt_ctf_field_sequence_set_length(). The integral value of | |
941 | the length field of a sequence field indicates the number of fields | |
942 | it contains. | |
943 | ||
944 | @sa ctfirseqfieldtype | |
945 | @sa ctfirfields | |
946 | ||
947 | @addtogroup ctfirseqfield | |
948 | @{ | |
949 | */ | |
950 | ||
951 | /** | |
952 | @brief Returns the @field at index \p index, potentially creating it, | |
953 | in the @seqfield \p sequence_field. | |
954 | ||
955 | This function creates the @field to return if it does not currently | |
956 | exist. | |
957 | ||
958 | @param[in] sequence_field Sequence field of which to get the field | |
959 | at index \p index. | |
960 | @param[in] index Index of the field to get in | |
961 | \p sequence_field. | |
962 | @returns Field at index \p index in | |
963 | \p sequence_field, or \c NULL on error. | |
964 | ||
965 | @prenotnull{sequence_field} | |
966 | @preisseqfield{sequence_field} | |
967 | @pre \p sequence_field has a length field previously set with | |
968 | bt_ctf_field_sequence_set_length(). | |
969 | @pre \p index is lesser than the current integral value of the current | |
970 | length field of \p sequence_field (see | |
971 | bt_ctf_field_sequence_get_length()). | |
972 | @postrefcountsame{sequence_field} | |
973 | @postsuccessrefcountretinc | |
974 | */ | |
975 | extern struct bt_ctf_field *bt_ctf_field_sequence_get_field( | |
976 | struct bt_ctf_field *sequence_field, uint64_t index); | |
977 | ||
978 | /** | |
979 | @brief Returns the length @intfield of the @seqfield \p sequence_field. | |
980 | ||
981 | The current integral value of the returned length field indicates the | |
982 | number of fields contained in \p sequence_field. | |
983 | ||
984 | @param[in] sequence_field Sequence field of which to get the | |
985 | length field. | |
986 | @returns Length field of \p sequence_field, or | |
987 | \c NULL on error. | |
988 | ||
989 | @prenotnull{sequence_field} | |
990 | @preisseqfield{sequence_field} | |
991 | @pre \p sequence_field has a length field previously set with | |
992 | bt_ctf_field_sequence_set_length(). | |
993 | @postrefcountsame{sequence_field} | |
994 | @postsuccessrefcountretinc | |
995 | @post <strong>On success</strong>, the returned field is a @intfield. | |
996 | ||
997 | @sa bt_ctf_field_sequence_set_length(): Sets the length field of a given | |
998 | sequence field. | |
999 | */ | |
1000 | extern struct bt_ctf_field *bt_ctf_field_sequence_get_length( | |
1001 | struct bt_ctf_field *sequence_field); | |
1002 | ||
1003 | /** | |
1004 | @brief Sets the length @intfield of the @seqfield \p sequence_field | |
1005 | to \p length_field. | |
1006 | ||
1007 | The current integral value of \p length_field indicates the number of | |
1008 | fields contained in \p sequence_field. | |
1009 | ||
1010 | @param[in] sequence_field Sequence field of which to set the | |
1011 | length field. | |
1012 | @param[in] length_field Length field of \p sequence_field. | |
1013 | @returns 0 on success, or a negative value on error. | |
1014 | ||
1015 | @prenotnull{sequence_field} | |
1016 | @prenotnull{length_field} | |
1017 | @preisseqfield{sequence_field} | |
1018 | @preisintfield{length_field} | |
1019 | @prehot{sequence_field} | |
1020 | @postrefcountsame{sequence_field} | |
1021 | @postsuccessrefcountinc{length_field} | |
1022 | ||
1023 | @sa bt_ctf_field_sequence_get_length(): Returns the length field of a | |
1024 | given sequence field. | |
1025 | */ | |
1026 | extern int bt_ctf_field_sequence_set_length(struct bt_ctf_field *sequence_field, | |
1027 | struct bt_ctf_field *length_field); | |
1028 | ||
1029 | /** @} */ | |
1030 | ||
1031 | /** | |
1032 | @defgroup ctfirvarfield CTF IR variant field | |
1033 | @ingroup ctfirfields | |
1034 | @brief CTF IR variant field. | |
1035 | ||
1036 | @code | |
1037 | #include <babeltrace/ctf-ir/fields.h> | |
1038 | @endcode | |
1039 | ||
1040 | A CTF IR <strong><em>variant field</em></strong> is a @field which | |
1041 | contains a current @field amongst one or more choices, and which is | |
1042 | described by a @varft. | |
1043 | ||
1044 | Use bt_ctf_field_variant_get_field() to get the @field selected by | |
1045 | a specific tag @enumfield. Once you call this function, you can call | |
1046 | bt_ctf_field_variant_get_current_field() afterwards to get this last | |
1047 | field again. | |
1048 | ||
1049 | @sa ctfirvarfieldtype | |
1050 | @sa ctfirfields | |
1051 | ||
1052 | @addtogroup ctfirvarfield | |
1053 | @{ | |
1054 | */ | |
1055 | ||
1056 | /** | |
1057 | @brief Returns the @field, potentially creating it, selected by the | |
1058 | tag @intfield \p tag_field in the @varfield \p variant_field. | |
1059 | ||
1060 | This function creates the @field to return if it does not currently | |
1061 | exist. | |
1062 | ||
1063 | Once you call this function, you can call | |
1064 | bt_ctf_field_variant_get_current_field() to get the same field again, | |
1065 | and you can call bt_ctf_field_variant_get_tag() to get \p tag_field. | |
1066 | ||
1067 | @param[in] variant_field Variant field of which to get the field | |
1068 | selected by \p tag_field. | |
1069 | @param[in] tag_field Tag field. | |
1070 | @returns Field selected by \p tag_field in | |
1071 | \p variant_field, or \c NULL on error. | |
1072 | ||
1073 | @prenotnull{variant_field} | |
1074 | @prenotnull{tag_field} | |
1075 | @preisvarfield{variant_field} | |
1076 | @preisenumfield{tag_field} | |
1077 | @postrefcountsame{variant_field} | |
1078 | @postsuccessrefcountinc{tag_field} | |
1079 | @postsuccessrefcountretinc | |
1080 | */ | |
1081 | extern struct bt_ctf_field *bt_ctf_field_variant_get_field( | |
1082 | struct bt_ctf_field *variant_field, | |
1083 | struct bt_ctf_field *tag_field); | |
1084 | ||
1085 | /** | |
1086 | @brief Returns the currently selected @field of the @varfield | |
1087 | \p variant_field. | |
1088 | ||
1089 | @param[in] variant_field Variant field of which to get the | |
1090 | currently selected field. | |
1091 | @returns Currently selected field of | |
1092 | \p variant_field, or \c NULL if there's | |
1093 | no selected field or on error. | |
1094 | ||
1095 | @prenotnull{variant_field} | |
1096 | @preisvarfield{variant_field} | |
1097 | @pre \p variant_field contains has a current selected field previously | |
1098 | set with bt_ctf_field_variant_get_field(). | |
1099 | @postrefcountsame{variant_field} | |
1100 | @postsuccessrefcountretinc | |
1101 | */ | |
1102 | extern struct bt_ctf_field *bt_ctf_field_variant_get_current_field( | |
1103 | struct bt_ctf_field *variant_field); | |
1104 | ||
1105 | /** | |
1106 | @brief Returns the tag @enumfield of the @varfield \p variant_field. | |
1107 | ||
1108 | @param[in] variant_field Variant field of which to get the | |
1109 | tag field. | |
1110 | @returns Tag field of \p variant_field, or | |
1111 | \c NULL on error. | |
1112 | ||
1113 | @prenotnull{variant_field} | |
1114 | @preisvarfield{variant_field} | |
1115 | @pre \p variant_field contains has a current selected field previously | |
1116 | set with bt_ctf_field_variant_get_field(). | |
1117 | @postrefcountsame{variant_field} | |
1118 | @postsuccessrefcountretinc | |
1119 | @post <strong>On success</strong>, the returned field is a @enumfield. | |
1120 | */ | |
1121 | extern struct bt_ctf_field *bt_ctf_field_variant_get_tag( | |
1122 | struct bt_ctf_field *variant_field); | |
1123 | ||
1124 | /** @} */ | |
a39fe52e | 1125 | |
adc315b8 JG |
1126 | #ifdef __cplusplus |
1127 | } | |
1128 | #endif | |
1129 | ||
2e33ac5a | 1130 | #endif /* BABELTRACE_CTF_IR_FIELDS_H */ |