Commit | Line | Data |
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44c440bc PP |
1 | /* |
2 | * Copyright 2018 Philippe Proulx <pproulx@efficios.com> | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
5 | * of this software and associated documentation files (the "Software"), to deal | |
6 | * in the Software without restriction, including without limitation the rights | |
7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
8 | * copies of the Software, and to permit persons to whom the Software is | |
9 | * furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
20 | * SOFTWARE. | |
21 | */ | |
22 | ||
23 | #define BT_LOG_TAG "RESOLVE-FIELD-PATH" | |
24 | #include <babeltrace/lib-logging-internal.h> | |
25 | ||
26 | #include <babeltrace/assert-pre-internal.h> | |
27 | #include <babeltrace/assert-internal.h> | |
e5be10ef | 28 | #include <babeltrace/object.h> |
5cd6d0e5 | 29 | #include <babeltrace/trace-ir/field-classes-internal.h> |
56e18c4c | 30 | #include <babeltrace/trace-ir/field-path-internal.h> |
40f4ba76 | 31 | #include <babeltrace/trace-ir/field-path-const.h> |
56e18c4c | 32 | #include <babeltrace/trace-ir/resolve-field-path-internal.h> |
44c440bc PP |
33 | #include <limits.h> |
34 | #include <stdint.h> | |
35 | #include <inttypes.h> | |
36 | #include <glib.h> | |
37 | ||
38 | static | |
5cd6d0e5 PP |
39 | bool find_field_class_recursive(struct bt_field_class *fc, |
40 | struct bt_field_class *tgt_fc, struct bt_field_path *field_path) | |
44c440bc PP |
41 | { |
42 | bool found = false; | |
43 | ||
5cd6d0e5 | 44 | if (tgt_fc == fc) { |
44c440bc PP |
45 | found = true; |
46 | goto end; | |
47 | } | |
48 | ||
864cad70 PP |
49 | switch (fc->type) { |
50 | case BT_FIELD_CLASS_TYPE_STRUCTURE: | |
51 | case BT_FIELD_CLASS_TYPE_VARIANT: | |
44c440bc | 52 | { |
5cd6d0e5 PP |
53 | struct bt_field_class_named_field_class_container *container_fc = |
54 | (void *) fc; | |
44c440bc PP |
55 | uint64_t i; |
56 | ||
5cd6d0e5 PP |
57 | for (i = 0; i < container_fc->named_fcs->len; i++) { |
58 | struct bt_named_field_class *named_fc = | |
59 | BT_FIELD_CLASS_NAMED_FC_AT_INDEX( | |
60 | container_fc, i); | |
44c440bc PP |
61 | |
62 | g_array_append_val(field_path->indexes, i); | |
5cd6d0e5 PP |
63 | found = find_field_class_recursive(named_fc->fc, |
64 | tgt_fc, field_path); | |
44c440bc PP |
65 | if (found) { |
66 | goto end; | |
67 | } | |
68 | ||
69 | g_array_set_size(field_path->indexes, | |
70 | field_path->indexes->len - 1); | |
71 | } | |
72 | ||
73 | break; | |
74 | } | |
864cad70 PP |
75 | case BT_FIELD_CLASS_TYPE_STATIC_ARRAY: |
76 | case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY: | |
44c440bc | 77 | { |
5cd6d0e5 | 78 | struct bt_field_class_array *array_fc = (void *) fc; |
44c440bc | 79 | |
5cd6d0e5 PP |
80 | found = find_field_class_recursive(array_fc->element_fc, |
81 | tgt_fc, field_path); | |
44c440bc PP |
82 | break; |
83 | } | |
84 | default: | |
85 | break; | |
86 | } | |
87 | ||
88 | end: | |
89 | return found; | |
90 | } | |
91 | ||
92 | static | |
5cd6d0e5 PP |
93 | int find_field_class(struct bt_field_class *root_fc, |
94 | enum bt_scope root_scope, struct bt_field_class *tgt_fc, | |
44c440bc PP |
95 | struct bt_field_path **ret_field_path) |
96 | { | |
97 | int ret = 0; | |
98 | struct bt_field_path *field_path = NULL; | |
99 | ||
5cd6d0e5 | 100 | if (!root_fc) { |
44c440bc PP |
101 | goto end; |
102 | } | |
103 | ||
104 | field_path = bt_field_path_create(); | |
105 | if (!field_path) { | |
106 | ret = -1; | |
107 | goto end; | |
108 | } | |
109 | ||
110 | field_path->root = root_scope; | |
5cd6d0e5 | 111 | if (!find_field_class_recursive(root_fc, tgt_fc, field_path)) { |
44c440bc | 112 | /* Not found here */ |
65300d60 | 113 | BT_OBJECT_PUT_REF_AND_RESET(field_path); |
44c440bc PP |
114 | } |
115 | ||
116 | end: | |
117 | *ret_field_path = field_path; | |
118 | return ret; | |
119 | } | |
120 | ||
121 | static | |
5cd6d0e5 | 122 | struct bt_field_path *find_field_class_in_ctx(struct bt_field_class *fc, |
44c440bc PP |
123 | struct bt_resolve_field_path_context *ctx) |
124 | { | |
125 | struct bt_field_path *field_path = NULL; | |
126 | int ret; | |
127 | ||
5cd6d0e5 PP |
128 | ret = find_field_class(ctx->packet_header, BT_SCOPE_PACKET_HEADER, |
129 | fc, &field_path); | |
44c440bc PP |
130 | if (ret || field_path) { |
131 | goto end; | |
132 | } | |
133 | ||
5cd6d0e5 PP |
134 | ret = find_field_class(ctx->packet_context, BT_SCOPE_PACKET_CONTEXT, |
135 | fc, &field_path); | |
44c440bc PP |
136 | if (ret || field_path) { |
137 | goto end; | |
138 | } | |
139 | ||
5cd6d0e5 PP |
140 | ret = find_field_class(ctx->event_header, BT_SCOPE_EVENT_HEADER, |
141 | fc, &field_path); | |
44c440bc PP |
142 | if (ret || field_path) { |
143 | goto end; | |
144 | } | |
145 | ||
5cd6d0e5 PP |
146 | ret = find_field_class(ctx->event_common_context, |
147 | BT_SCOPE_EVENT_COMMON_CONTEXT, fc, &field_path); | |
44c440bc PP |
148 | if (ret || field_path) { |
149 | goto end; | |
150 | } | |
151 | ||
5cd6d0e5 PP |
152 | ret = find_field_class(ctx->event_specific_context, |
153 | BT_SCOPE_EVENT_SPECIFIC_CONTEXT, fc, &field_path); | |
44c440bc PP |
154 | if (ret || field_path) { |
155 | goto end; | |
156 | } | |
157 | ||
5cd6d0e5 PP |
158 | ret = find_field_class(ctx->event_payload, BT_SCOPE_EVENT_PAYLOAD, |
159 | fc, &field_path); | |
44c440bc PP |
160 | if (ret || field_path) { |
161 | goto end; | |
162 | } | |
163 | ||
164 | end: | |
165 | return field_path; | |
166 | } | |
167 | ||
168 | BT_ASSERT_PRE_FUNC | |
169 | static inline | |
170 | bool target_is_before_source(struct bt_field_path *src_field_path, | |
171 | struct bt_field_path *tgt_field_path) | |
172 | { | |
173 | bool is_valid = true; | |
174 | uint64_t src_i = 0, tgt_i = 0; | |
175 | ||
176 | if (tgt_field_path->root < src_field_path->root) { | |
177 | goto end; | |
178 | } | |
179 | ||
180 | if (tgt_field_path->root > src_field_path->root) { | |
181 | is_valid = false; | |
182 | goto end; | |
183 | } | |
184 | ||
185 | BT_ASSERT(tgt_field_path->root == src_field_path->root); | |
186 | ||
187 | while (src_i < src_field_path->indexes->len && | |
188 | tgt_i < tgt_field_path->indexes->len) { | |
189 | uint64_t src_index = bt_field_path_get_index_by_index_inline( | |
190 | src_field_path, src_i); | |
191 | uint64_t tgt_index = bt_field_path_get_index_by_index_inline( | |
192 | tgt_field_path, tgt_i); | |
193 | ||
194 | if (tgt_index > src_index) { | |
195 | is_valid = false; | |
196 | goto end; | |
197 | } | |
198 | ||
199 | src_i++; | |
200 | tgt_i++; | |
201 | } | |
202 | ||
203 | end: | |
204 | return is_valid; | |
205 | } | |
206 | ||
207 | BT_ASSERT_PRE_FUNC | |
208 | static inline | |
5cd6d0e5 | 209 | struct bt_field_class *borrow_root_field_class( |
44c440bc PP |
210 | struct bt_resolve_field_path_context *ctx, enum bt_scope scope) |
211 | { | |
212 | switch (scope) { | |
213 | case BT_SCOPE_PACKET_HEADER: | |
214 | return ctx->packet_header; | |
215 | case BT_SCOPE_PACKET_CONTEXT: | |
216 | return ctx->packet_context; | |
217 | case BT_SCOPE_EVENT_HEADER: | |
218 | return ctx->event_header; | |
219 | case BT_SCOPE_EVENT_COMMON_CONTEXT: | |
220 | return ctx->event_common_context; | |
221 | case BT_SCOPE_EVENT_SPECIFIC_CONTEXT: | |
222 | return ctx->event_specific_context; | |
223 | case BT_SCOPE_EVENT_PAYLOAD: | |
224 | return ctx->event_payload; | |
225 | default: | |
226 | abort(); | |
227 | } | |
228 | ||
229 | return NULL; | |
230 | } | |
231 | ||
232 | BT_ASSERT_PRE_FUNC | |
233 | static inline | |
5cd6d0e5 | 234 | struct bt_field_class *borrow_child_field_class(struct bt_field_class *parent_fc, |
44c440bc PP |
235 | uint64_t index, bool *advance) |
236 | { | |
5cd6d0e5 | 237 | struct bt_field_class *child_fc = NULL; |
44c440bc | 238 | |
864cad70 PP |
239 | switch (parent_fc->type) { |
240 | case BT_FIELD_CLASS_TYPE_STRUCTURE: | |
241 | case BT_FIELD_CLASS_TYPE_VARIANT: | |
44c440bc | 242 | { |
5cd6d0e5 PP |
243 | struct bt_named_field_class *named_fc = |
244 | BT_FIELD_CLASS_NAMED_FC_AT_INDEX(parent_fc, index); | |
44c440bc | 245 | |
5cd6d0e5 | 246 | child_fc = named_fc->fc; |
44c440bc PP |
247 | *advance = true; |
248 | break; | |
249 | } | |
864cad70 PP |
250 | case BT_FIELD_CLASS_TYPE_STATIC_ARRAY: |
251 | case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY: | |
44c440bc | 252 | { |
5cd6d0e5 | 253 | struct bt_field_class_array *array_fc = (void *) parent_fc; |
44c440bc | 254 | |
5cd6d0e5 | 255 | child_fc = array_fc->element_fc; |
44c440bc PP |
256 | *advance = false; |
257 | break; | |
258 | } | |
259 | default: | |
260 | break; | |
261 | } | |
262 | ||
5cd6d0e5 | 263 | return child_fc; |
44c440bc PP |
264 | } |
265 | ||
266 | BT_ASSERT_PRE_FUNC | |
267 | static inline | |
5cd6d0e5 | 268 | bool target_field_path_in_different_scope_has_struct_fc_only( |
44c440bc PP |
269 | struct bt_field_path *src_field_path, |
270 | struct bt_field_path *tgt_field_path, | |
271 | struct bt_resolve_field_path_context *ctx) | |
272 | { | |
273 | bool is_valid = true; | |
274 | uint64_t i = 0; | |
5cd6d0e5 | 275 | struct bt_field_class *fc; |
44c440bc PP |
276 | |
277 | if (src_field_path->root == tgt_field_path->root) { | |
278 | goto end; | |
279 | } | |
280 | ||
5cd6d0e5 | 281 | fc = borrow_root_field_class(ctx, tgt_field_path->root); |
44c440bc PP |
282 | |
283 | while (i < tgt_field_path->indexes->len) { | |
284 | uint64_t index = bt_field_path_get_index_by_index_inline( | |
285 | tgt_field_path, i); | |
286 | bool advance; | |
287 | ||
864cad70 PP |
288 | if (fc->type == BT_FIELD_CLASS_TYPE_STATIC_ARRAY || |
289 | fc->type == BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY || | |
290 | fc->type == BT_FIELD_CLASS_TYPE_VARIANT) { | |
44c440bc PP |
291 | is_valid = false; |
292 | goto end; | |
293 | } | |
294 | ||
5cd6d0e5 | 295 | fc = borrow_child_field_class(fc, index, &advance); |
44c440bc PP |
296 | |
297 | if (advance) { | |
298 | i++; | |
299 | } | |
300 | } | |
301 | ||
302 | end: | |
303 | return is_valid; | |
304 | } | |
305 | ||
306 | BT_ASSERT_PRE_FUNC | |
307 | static inline | |
5cd6d0e5 | 308 | bool lca_is_structure_field_class(struct bt_field_path *src_field_path, |
44c440bc PP |
309 | struct bt_field_path *tgt_field_path, |
310 | struct bt_resolve_field_path_context *ctx) | |
311 | { | |
312 | bool is_valid = true; | |
5cd6d0e5 PP |
313 | struct bt_field_class *src_fc; |
314 | struct bt_field_class *tgt_fc; | |
315 | struct bt_field_class *prev_fc = NULL; | |
44c440bc PP |
316 | uint64_t src_i = 0, tgt_i = 0; |
317 | ||
318 | if (src_field_path->root != tgt_field_path->root) { | |
319 | goto end; | |
320 | } | |
321 | ||
5cd6d0e5 PP |
322 | src_fc = borrow_root_field_class(ctx, src_field_path->root); |
323 | tgt_fc = borrow_root_field_class(ctx, tgt_field_path->root); | |
324 | BT_ASSERT(src_fc); | |
325 | BT_ASSERT(tgt_fc); | |
44c440bc PP |
326 | |
327 | while (src_i < src_field_path->indexes->len && | |
328 | tgt_i < tgt_field_path->indexes->len) { | |
329 | bool advance; | |
330 | uint64_t src_index = bt_field_path_get_index_by_index_inline( | |
331 | src_field_path, src_i); | |
332 | uint64_t tgt_index = bt_field_path_get_index_by_index_inline( | |
333 | tgt_field_path, tgt_i); | |
334 | ||
5cd6d0e5 PP |
335 | if (src_fc != tgt_fc) { |
336 | if (!prev_fc) { | |
44c440bc PP |
337 | /* |
338 | * This is correct: the LCA is the root | |
5cd6d0e5 PP |
339 | * scope field classe, which must be a |
340 | * structure field classe. | |
44c440bc PP |
341 | */ |
342 | break; | |
343 | } | |
344 | ||
864cad70 | 345 | if (prev_fc->type != BT_FIELD_CLASS_TYPE_STRUCTURE) { |
44c440bc PP |
346 | is_valid = false; |
347 | } | |
348 | ||
349 | break; | |
350 | } | |
351 | ||
5cd6d0e5 PP |
352 | prev_fc = src_fc; |
353 | src_fc = borrow_child_field_class(src_fc, src_index, &advance); | |
44c440bc PP |
354 | |
355 | if (advance) { | |
356 | src_i++; | |
357 | } | |
358 | ||
5cd6d0e5 | 359 | tgt_fc = borrow_child_field_class(tgt_fc, tgt_index, &advance); |
44c440bc PP |
360 | |
361 | if (advance) { | |
362 | tgt_i++; | |
363 | } | |
364 | } | |
365 | ||
366 | end: | |
367 | return is_valid; | |
368 | } | |
369 | ||
370 | BT_ASSERT_PRE_FUNC | |
371 | static inline | |
5cd6d0e5 | 372 | bool lca_to_target_has_struct_fc_only(struct bt_field_path *src_field_path, |
44c440bc PP |
373 | struct bt_field_path *tgt_field_path, |
374 | struct bt_resolve_field_path_context *ctx) | |
375 | { | |
376 | bool is_valid = true; | |
5cd6d0e5 PP |
377 | struct bt_field_class *src_fc; |
378 | struct bt_field_class *tgt_fc; | |
44c440bc PP |
379 | uint64_t src_i = 0, tgt_i = 0; |
380 | ||
381 | if (src_field_path->root != tgt_field_path->root) { | |
382 | goto end; | |
383 | } | |
384 | ||
5cd6d0e5 PP |
385 | src_fc = borrow_root_field_class(ctx, src_field_path->root); |
386 | tgt_fc = borrow_root_field_class(ctx, tgt_field_path->root); | |
387 | BT_ASSERT(src_fc); | |
388 | BT_ASSERT(tgt_fc); | |
389 | BT_ASSERT(src_fc == tgt_fc); | |
44c440bc PP |
390 | |
391 | /* Find LCA */ | |
392 | while (src_i < src_field_path->indexes->len && | |
393 | tgt_i < tgt_field_path->indexes->len) { | |
394 | bool advance; | |
395 | uint64_t src_index = bt_field_path_get_index_by_index_inline( | |
396 | src_field_path, src_i); | |
397 | uint64_t tgt_index = bt_field_path_get_index_by_index_inline( | |
398 | tgt_field_path, tgt_i); | |
399 | ||
400 | if (src_i != tgt_i) { | |
5cd6d0e5 | 401 | /* Next field class is different: LCA is `tgt_fc` */ |
44c440bc PP |
402 | break; |
403 | } | |
404 | ||
5cd6d0e5 | 405 | src_fc = borrow_child_field_class(src_fc, src_index, &advance); |
44c440bc PP |
406 | |
407 | if (advance) { | |
408 | src_i++; | |
409 | } | |
410 | ||
5cd6d0e5 | 411 | tgt_fc = borrow_child_field_class(tgt_fc, tgt_index, &advance); |
44c440bc PP |
412 | |
413 | if (advance) { | |
414 | tgt_i++; | |
415 | } | |
416 | } | |
417 | ||
5cd6d0e5 | 418 | /* Only structure field classes to the target */ |
44c440bc PP |
419 | while (tgt_i < tgt_field_path->indexes->len) { |
420 | bool advance; | |
421 | uint64_t tgt_index = bt_field_path_get_index_by_index_inline( | |
422 | tgt_field_path, tgt_i); | |
423 | ||
864cad70 PP |
424 | if (tgt_fc->type == BT_FIELD_CLASS_TYPE_STATIC_ARRAY || |
425 | tgt_fc->type == BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY || | |
426 | tgt_fc->type == BT_FIELD_CLASS_TYPE_VARIANT) { | |
44c440bc PP |
427 | is_valid = false; |
428 | goto end; | |
429 | } | |
430 | ||
5cd6d0e5 | 431 | tgt_fc = borrow_child_field_class(tgt_fc, tgt_index, &advance); |
44c440bc PP |
432 | |
433 | if (advance) { | |
434 | tgt_i++; | |
435 | } | |
436 | } | |
437 | ||
438 | end: | |
439 | return is_valid; | |
440 | } | |
441 | ||
442 | BT_ASSERT_PRE_FUNC | |
443 | static inline | |
5cd6d0e5 PP |
444 | bool field_path_is_valid(struct bt_field_class *src_fc, |
445 | struct bt_field_class *tgt_fc, | |
44c440bc PP |
446 | struct bt_resolve_field_path_context *ctx) |
447 | { | |
448 | bool is_valid = true; | |
5cd6d0e5 PP |
449 | struct bt_field_path *src_field_path = find_field_class_in_ctx( |
450 | src_fc, ctx); | |
451 | struct bt_field_path *tgt_field_path = find_field_class_in_ctx( | |
452 | tgt_fc, ctx); | |
44c440bc PP |
453 | |
454 | if (!src_field_path) { | |
5cd6d0e5 PP |
455 | BT_ASSERT_PRE_MSG("Cannot find requesting field classe in " |
456 | "resolving context: %!+F", src_fc); | |
44c440bc PP |
457 | is_valid = false; |
458 | goto end; | |
459 | } | |
460 | ||
461 | if (!tgt_field_path) { | |
5cd6d0e5 PP |
462 | BT_ASSERT_PRE_MSG("Cannot find target field classe in " |
463 | "resolving context: %!+F", tgt_fc); | |
44c440bc PP |
464 | is_valid = false; |
465 | goto end; | |
466 | } | |
467 | ||
468 | /* Target must be before source */ | |
469 | if (!target_is_before_source(src_field_path, tgt_field_path)) { | |
5cd6d0e5 PP |
470 | BT_ASSERT_PRE_MSG("Target field classe is located after " |
471 | "requesting field classe: %![req-fc-]+F, %![tgt-fc-]+F", | |
472 | src_fc, tgt_fc); | |
44c440bc PP |
473 | is_valid = false; |
474 | goto end; | |
475 | } | |
476 | ||
477 | /* | |
478 | * If target is in a different scope than source, there are no | |
5cd6d0e5 | 479 | * array or variant field classes on the way to the target. |
44c440bc | 480 | */ |
5cd6d0e5 | 481 | if (!target_field_path_in_different_scope_has_struct_fc_only( |
44c440bc | 482 | src_field_path, tgt_field_path, ctx)) { |
5cd6d0e5 PP |
483 | BT_ASSERT_PRE_MSG("Target field classe is located in a " |
484 | "different scope than requesting field classe, " | |
485 | "but within an array or a variant field classe: " | |
486 | "%![req-fc-]+F, %![tgt-fc-]+F", | |
487 | src_fc, tgt_fc); | |
44c440bc PP |
488 | is_valid = false; |
489 | goto end; | |
490 | } | |
491 | ||
5cd6d0e5 PP |
492 | /* Same scope: LCA must be a structure field classe */ |
493 | if (!lca_is_structure_field_class(src_field_path, tgt_field_path, ctx)) { | |
44c440bc | 494 | BT_ASSERT_PRE_MSG("Lowest common ancestor of target and " |
5cd6d0e5 PP |
495 | "requesting field classes is not a structure field classe: " |
496 | "%![req-fc-]+F, %![tgt-fc-]+F", | |
497 | src_fc, tgt_fc); | |
44c440bc PP |
498 | is_valid = false; |
499 | goto end; | |
500 | } | |
501 | ||
502 | /* Same scope: path from LCA to target has no array/variant FTs */ | |
5cd6d0e5 | 503 | if (!lca_to_target_has_struct_fc_only(src_field_path, tgt_field_path, |
44c440bc PP |
504 | ctx)) { |
505 | BT_ASSERT_PRE_MSG("Path from lowest common ancestor of target " | |
5cd6d0e5 PP |
506 | "and requesting field classes to target field classe " |
507 | "contains an array or a variant field classe: " | |
508 | "%![req-fc-]+F, %![tgt-fc-]+F", src_fc, tgt_fc); | |
44c440bc PP |
509 | is_valid = false; |
510 | goto end; | |
511 | } | |
512 | ||
513 | end: | |
65300d60 PP |
514 | bt_object_put_ref(src_field_path); |
515 | bt_object_put_ref(tgt_field_path); | |
44c440bc PP |
516 | return is_valid; |
517 | } | |
518 | ||
519 | static | |
5cd6d0e5 PP |
520 | struct bt_field_path *resolve_field_path(struct bt_field_class *src_fc, |
521 | struct bt_field_class *tgt_fc, | |
44c440bc PP |
522 | struct bt_resolve_field_path_context *ctx) |
523 | { | |
5cd6d0e5 PP |
524 | BT_ASSERT_PRE(field_path_is_valid(src_fc, tgt_fc, ctx), |
525 | "Invalid target field classe: %![req-fc-]+F, %![tgt-fc-]+F", | |
526 | src_fc, tgt_fc); | |
527 | return find_field_class_in_ctx(tgt_fc, ctx); | |
44c440bc PP |
528 | } |
529 | ||
530 | BT_HIDDEN | |
5cd6d0e5 | 531 | int bt_resolve_field_paths(struct bt_field_class *fc, |
44c440bc PP |
532 | struct bt_resolve_field_path_context *ctx) |
533 | { | |
534 | int ret = 0; | |
535 | ||
5cd6d0e5 | 536 | BT_ASSERT(fc); |
44c440bc | 537 | |
5cd6d0e5 | 538 | /* Resolving part for dynamic array and variant field classes */ |
864cad70 PP |
539 | switch (fc->type) { |
540 | case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY: | |
44c440bc | 541 | { |
5cd6d0e5 | 542 | struct bt_field_class_dynamic_array *dyn_array_fc = (void *) fc; |
44c440bc | 543 | |
5cd6d0e5 PP |
544 | if (dyn_array_fc->length_fc) { |
545 | BT_ASSERT(!dyn_array_fc->length_field_path); | |
546 | dyn_array_fc->length_field_path = resolve_field_path( | |
547 | fc, dyn_array_fc->length_fc, ctx); | |
548 | if (!dyn_array_fc->length_field_path) { | |
44c440bc PP |
549 | ret = -1; |
550 | goto end; | |
551 | } | |
552 | } | |
553 | ||
554 | break; | |
555 | } | |
864cad70 | 556 | case BT_FIELD_CLASS_TYPE_VARIANT: |
44c440bc | 557 | { |
5cd6d0e5 PP |
558 | struct bt_field_class_variant *var_fc = (void *) fc; |
559 | ||
560 | if (var_fc->selector_fc) { | |
561 | BT_ASSERT(!var_fc->selector_field_path); | |
562 | var_fc->selector_field_path = | |
563 | resolve_field_path(fc, | |
564 | var_fc->selector_fc, ctx); | |
565 | if (!var_fc->selector_field_path) { | |
44c440bc PP |
566 | ret = -1; |
567 | goto end; | |
568 | } | |
569 | } | |
570 | } | |
571 | default: | |
572 | break; | |
573 | } | |
574 | ||
575 | /* Recursive part */ | |
864cad70 PP |
576 | switch (fc->type) { |
577 | case BT_FIELD_CLASS_TYPE_STRUCTURE: | |
578 | case BT_FIELD_CLASS_TYPE_VARIANT: | |
44c440bc | 579 | { |
5cd6d0e5 PP |
580 | struct bt_field_class_named_field_class_container *container_fc = |
581 | (void *) fc; | |
44c440bc PP |
582 | uint64_t i; |
583 | ||
5cd6d0e5 PP |
584 | for (i = 0; i < container_fc->named_fcs->len; i++) { |
585 | struct bt_named_field_class *named_fc = | |
586 | BT_FIELD_CLASS_NAMED_FC_AT_INDEX( | |
587 | container_fc, i); | |
44c440bc | 588 | |
5cd6d0e5 | 589 | ret = bt_resolve_field_paths(named_fc->fc, ctx); |
44c440bc PP |
590 | if (ret) { |
591 | goto end; | |
592 | } | |
593 | } | |
594 | ||
595 | break; | |
596 | } | |
864cad70 PP |
597 | case BT_FIELD_CLASS_TYPE_STATIC_ARRAY: |
598 | case BT_FIELD_CLASS_TYPE_DYNAMIC_ARRAY: | |
44c440bc | 599 | { |
5cd6d0e5 | 600 | struct bt_field_class_array *array_fc = (void *) fc; |
44c440bc | 601 | |
5cd6d0e5 | 602 | ret = bt_resolve_field_paths(array_fc->element_fc, ctx); |
44c440bc PP |
603 | break; |
604 | } | |
605 | default: | |
606 | break; | |
607 | } | |
608 | ||
609 | end: | |
610 | return ret; | |
611 | } |