Commit | Line | Data |
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e98a2d6e PP |
1 | /* |
2 | * Babeltrace - CTF binary type reader (BTR) | |
3 | * | |
4 | * Copyright (c) 2015-2016 EfficiOS Inc. and Linux Foundation | |
5 | * Copyright (c) 2015-2016 Philippe Proulx <pproulx@efficios.com> | |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
8 | * of this software and associated documentation files (the "Software"), to deal | |
9 | * in the Software without restriction, including without limitation the rights | |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | * copies of the Software, and to permit persons to whom the Software is | |
12 | * furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
20 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
23 | * SOFTWARE. | |
24 | */ | |
25 | ||
dfef8367 | 26 | #define BT_LOG_TAG "PLUGIN-CTF-BTR" |
888d5a32 | 27 | #include "logging.h" |
dfef8367 | 28 | |
0fbb9a9f | 29 | #include <stdlib.h> |
e98a2d6e | 30 | #include <stdint.h> |
dfef8367 | 31 | #include <inttypes.h> |
e98a2d6e PP |
32 | #include <stdio.h> |
33 | #include <stddef.h> | |
34 | #include <stdbool.h> | |
35 | #include <assert.h> | |
36 | #include <string.h> | |
3d9990ac | 37 | #include <babeltrace/bitfield-internal.h> |
e98a2d6e | 38 | #include <babeltrace/ctf-ir/field-types.h> |
dfef8367 | 39 | #include <babeltrace/ctf-ir/field-types-internal.h> |
e98a2d6e | 40 | #include <babeltrace/ref.h> |
3d9990ac | 41 | #include <babeltrace/align-internal.h> |
e98a2d6e PP |
42 | #include <glib.h> |
43 | ||
06a626b8 | 44 | #include "btr.h" |
e98a2d6e | 45 | |
cc491a8f | 46 | #define PRINT_ERR_STREAM (btr ? btr->err_stream : stderr) |
e98a2d6e | 47 | #define PRINT_PREFIX "ctf-btr" |
1e649dff | 48 | #include "../print.h" |
e98a2d6e PP |
49 | |
50 | #define DIV8(_x) ((_x) >> 3) | |
51 | #define BYTES_TO_BITS(_x) ((_x) * 8) | |
52 | #define BITS_TO_BYTES_FLOOR(_x) DIV8(_x) | |
53 | #define BITS_TO_BYTES_CEIL(_x) DIV8((_x) + 7) | |
54 | #define IN_BYTE_OFFSET(_at) ((_at) & 7) | |
55 | ||
56 | /* A visit stack entry */ | |
57 | struct stack_entry { | |
58 | /* | |
59 | * Current type of base field, one of: | |
60 | * | |
61 | * * Structure | |
62 | * * Array | |
63 | * * Sequence | |
64 | * * Variant | |
65 | * | |
66 | * Owned by this. | |
67 | */ | |
68 | struct bt_ctf_field_type *base_type; | |
69 | ||
70 | /* Length of base field (always 1 for variant types) */ | |
71 | int64_t base_len; | |
72 | ||
73 | /* Lndex of next field to read */ | |
74 | int64_t index; | |
75 | }; | |
76 | ||
77 | /* Visit stack */ | |
78 | struct stack { | |
79 | /* Entries (struct stack_entry *) (top is last element) */ | |
80 | GPtrArray *entries; | |
81 | }; | |
82 | ||
83 | /* Reading states */ | |
84 | enum btr_state { | |
85 | BTR_STATE_NEXT_FIELD, | |
86 | BTR_STATE_ALIGN_BASIC, | |
87 | BTR_STATE_ALIGN_COMPOUND, | |
88 | BTR_STATE_READ_BASIC_BEGIN, | |
89 | BTR_STATE_READ_BASIC_CONTINUE, | |
90 | BTR_STATE_DONE, | |
91 | }; | |
92 | ||
93 | /* Binary type reader */ | |
94 | struct bt_ctf_btr { | |
95 | /* Bisit stack */ | |
96 | struct stack *stack; | |
97 | ||
98 | /* Error stream */ | |
99 | FILE *err_stream; | |
100 | ||
101 | /* Current basic field type */ | |
102 | struct bt_ctf_field_type *cur_basic_field_type; | |
103 | ||
104 | /* Current state */ | |
105 | enum btr_state state; | |
106 | ||
107 | /* | |
108 | * Last basic field type's byte order. | |
109 | * | |
110 | * This is used to detect errors since two contiguous basic | |
111 | * types for which the common boundary is not the boundary of | |
112 | * a byte cannot have different byte orders. | |
113 | * | |
114 | * This is set to BT_CTF_BYTE_ORDER_UNKNOWN on reset and when | |
115 | * the last basic field type was a string type. | |
116 | */ | |
117 | enum bt_ctf_byte_order last_bo; | |
118 | ||
119 | /* Current byte order (copied to last_bo after a successful read) */ | |
120 | enum bt_ctf_byte_order cur_bo; | |
121 | ||
122 | /* Stitch buffer infos */ | |
123 | struct { | |
124 | /* Stitch buffer */ | |
125 | uint8_t buf[16]; | |
126 | ||
127 | /* Offset, within stitch buffer, of first bit */ | |
128 | size_t offset; | |
129 | ||
130 | /* Length (bits) of data in stitch buffer from offset */ | |
131 | size_t at; | |
132 | } stitch; | |
133 | ||
134 | /* User buffer infos */ | |
135 | struct { | |
136 | /* Address */ | |
137 | const uint8_t *addr; | |
138 | ||
139 | /* Offset of data from address (bits) */ | |
140 | size_t offset; | |
141 | ||
142 | /* Current position from offset (bits) */ | |
143 | size_t at; | |
144 | ||
145 | /* Offset of offset within whole packet (bits) */ | |
146 | size_t packet_offset; | |
147 | ||
148 | /* Data size in buffer (bits) */ | |
149 | size_t sz; | |
150 | ||
151 | /* Buffer size (bytes) */ | |
152 | size_t buf_sz; | |
153 | } buf; | |
154 | ||
155 | /* User stuff */ | |
156 | struct { | |
157 | /* Callback functions */ | |
158 | struct bt_ctf_btr_cbs cbs; | |
159 | ||
160 | /* Private data */ | |
161 | void *data; | |
162 | } user; | |
163 | }; | |
164 | ||
dfef8367 PP |
165 | static inline |
166 | const char *btr_state_string(enum btr_state state) | |
167 | { | |
168 | switch (state) { | |
169 | case BTR_STATE_NEXT_FIELD: | |
170 | return "BTR_STATE_NEXT_FIELD"; | |
171 | case BTR_STATE_ALIGN_BASIC: | |
172 | return "BTR_STATE_ALIGN_BASIC"; | |
173 | case BTR_STATE_ALIGN_COMPOUND: | |
174 | return "BTR_STATE_ALIGN_COMPOUND"; | |
175 | case BTR_STATE_READ_BASIC_BEGIN: | |
176 | return "BTR_STATE_READ_BASIC_BEGIN"; | |
177 | case BTR_STATE_READ_BASIC_CONTINUE: | |
178 | return "BTR_STATE_READ_BASIC_CONTINUE"; | |
179 | case BTR_STATE_DONE: | |
180 | return "BTR_STATE_DONE"; | |
181 | default: | |
182 | return "(unknown)"; | |
183 | } | |
184 | } | |
185 | ||
e98a2d6e PP |
186 | static |
187 | void stack_entry_free_func(gpointer data) | |
188 | { | |
189 | struct stack_entry *entry = data; | |
190 | ||
191 | BT_PUT(entry->base_type); | |
192 | g_free(entry); | |
193 | } | |
194 | ||
195 | static | |
196 | struct stack *stack_new(void) | |
197 | { | |
198 | struct stack *stack = NULL; | |
199 | ||
200 | stack = g_new0(struct stack, 1); | |
201 | if (!stack) { | |
dfef8367 | 202 | BT_LOGE_STR("Failed to allocate one stack."); |
e98a2d6e PP |
203 | goto error; |
204 | } | |
205 | ||
206 | stack->entries = g_ptr_array_new_with_free_func(stack_entry_free_func); | |
207 | if (!stack->entries) { | |
dfef8367 | 208 | BT_LOGE_STR("Failed to allocate a GPtrArray."); |
e98a2d6e PP |
209 | goto error; |
210 | } | |
211 | ||
dfef8367 | 212 | BT_LOGD("Created stack: addr=%p", stack); |
e98a2d6e PP |
213 | return stack; |
214 | ||
215 | error: | |
216 | g_free(stack); | |
217 | ||
218 | return NULL; | |
219 | } | |
220 | ||
221 | static | |
222 | void stack_destroy(struct stack *stack) | |
223 | { | |
224 | if (!stack) { | |
225 | return; | |
226 | } | |
227 | ||
dfef8367 | 228 | BT_LOGD("Destroying stack: addr=%p", stack); |
e98a2d6e PP |
229 | g_ptr_array_free(stack->entries, TRUE); |
230 | g_free(stack); | |
231 | } | |
232 | ||
233 | static inline | |
234 | int64_t get_compound_field_type_length(struct bt_ctf_btr *btr, | |
dfef8367 | 235 | struct bt_ctf_field_type *field_type) |
e98a2d6e PP |
236 | { |
237 | int64_t length; | |
238 | ||
239 | switch (bt_ctf_field_type_get_type_id(field_type)) { | |
1487a16a | 240 | case BT_CTF_FIELD_TYPE_ID_STRUCT: |
e98a2d6e PP |
241 | length = (int64_t) bt_ctf_field_type_structure_get_field_count( |
242 | field_type); | |
243 | break; | |
1487a16a | 244 | case BT_CTF_FIELD_TYPE_ID_VARIANT: |
e98a2d6e PP |
245 | /* Variant field types always "contain" a single type */ |
246 | length = 1; | |
247 | break; | |
1487a16a | 248 | case BT_CTF_FIELD_TYPE_ID_ARRAY: |
e98a2d6e PP |
249 | length = bt_ctf_field_type_array_get_length(field_type); |
250 | break; | |
1487a16a | 251 | case BT_CTF_FIELD_TYPE_ID_SEQUENCE: |
e98a2d6e PP |
252 | length = btr->user.cbs.query.get_sequence_length(field_type, |
253 | btr->user.data); | |
254 | break; | |
255 | default: | |
dfef8367 PP |
256 | BT_LOGW("Cannot get field type's field count: btr-addr=%p, " |
257 | "ft-addr=%p, ft-id=%s", | |
258 | btr, field_type, | |
259 | bt_ctf_field_type_id_string( | |
260 | bt_ctf_field_type_get_type_id(field_type))); | |
e98a2d6e PP |
261 | length = BT_CTF_BTR_STATUS_ERROR; |
262 | } | |
263 | ||
264 | return length; | |
265 | } | |
266 | ||
267 | static | |
268 | int stack_push(struct stack *stack, struct bt_ctf_field_type *base_type, | |
269 | size_t base_len) | |
270 | { | |
271 | int ret = 0; | |
272 | struct stack_entry *entry; | |
273 | ||
274 | assert(stack); | |
275 | assert(base_type); | |
276 | ||
dfef8367 PP |
277 | BT_LOGV("Pushing field type on stack: stack-addr=%p, " |
278 | "ft-addr=%p, ft-id=%s, base-length=%zu, " | |
279 | "stack-size-before=%u, stack-size-after=%u", | |
280 | stack, base_type, bt_ctf_field_type_id_string( | |
281 | bt_ctf_field_type_get_type_id(base_type)), | |
282 | base_len, stack->entries->len, stack->entries->len + 1); | |
e98a2d6e PP |
283 | entry = g_new0(struct stack_entry, 1); |
284 | if (!entry) { | |
dfef8367 PP |
285 | BT_LOGE("Failed to allocate one stack entry: stack-addr=%p", |
286 | stack); | |
e98a2d6e PP |
287 | ret = BT_CTF_BTR_STATUS_ERROR; |
288 | goto end; | |
289 | } | |
290 | ||
291 | entry->base_type = base_type; | |
292 | bt_get(entry->base_type); | |
293 | entry->base_len = base_len; | |
294 | g_ptr_array_add(stack->entries, entry); | |
295 | ||
296 | end: | |
297 | return ret; | |
298 | } | |
299 | ||
300 | static | |
301 | int stack_push_with_len(struct bt_ctf_btr *btr, | |
dfef8367 | 302 | struct bt_ctf_field_type *base_type) |
e98a2d6e PP |
303 | { |
304 | int ret = 0; | |
305 | int64_t base_len = get_compound_field_type_length(btr, base_type); | |
306 | ||
307 | if (base_len < 0) { | |
dfef8367 PP |
308 | BT_LOGW("Cannot get compound field type's field count: " |
309 | "btr-addr=%p, ft-addr=%p, ft-id=%s", | |
310 | btr, base_type, bt_ctf_field_type_id_string( | |
311 | bt_ctf_field_type_get_type_id(base_type))); | |
e98a2d6e PP |
312 | ret = BT_CTF_BTR_STATUS_ERROR; |
313 | goto end; | |
314 | } | |
315 | ||
316 | ret = stack_push(btr->stack, base_type, (size_t) base_len); | |
317 | ||
318 | end: | |
319 | return ret; | |
320 | } | |
321 | ||
322 | static inline | |
323 | unsigned int stack_size(struct stack *stack) | |
324 | { | |
325 | assert(stack); | |
326 | ||
327 | return stack->entries->len; | |
328 | } | |
329 | ||
330 | static | |
331 | void stack_pop(struct stack *stack) | |
332 | { | |
333 | assert(stack); | |
334 | assert(stack_size(stack)); | |
dfef8367 PP |
335 | BT_LOGV("Popping from stack: " |
336 | "stack-addr=%p, stack-size-before=%u, stack-size-after=%u", | |
337 | stack, stack->entries->len, stack->entries->len - 1); | |
e98a2d6e PP |
338 | g_ptr_array_remove_index(stack->entries, stack->entries->len - 1); |
339 | } | |
340 | ||
341 | static inline | |
342 | bool stack_empty(struct stack *stack) | |
343 | { | |
344 | return stack_size(stack) == 0; | |
345 | } | |
346 | ||
347 | static | |
348 | void stack_clear(struct stack *stack) | |
349 | { | |
350 | assert(stack); | |
351 | ||
352 | if (!stack_empty(stack)) { | |
353 | g_ptr_array_remove_range(stack->entries, 0, stack_size(stack)); | |
354 | } | |
355 | ||
356 | assert(stack_empty(stack)); | |
357 | } | |
358 | ||
359 | static inline | |
360 | struct stack_entry *stack_top(struct stack *stack) | |
361 | { | |
362 | assert(stack); | |
363 | assert(stack_size(stack)); | |
364 | ||
365 | return g_ptr_array_index(stack->entries, stack->entries->len - 1); | |
366 | } | |
367 | ||
368 | static inline | |
369 | size_t available_bits(struct bt_ctf_btr *btr) | |
370 | { | |
371 | return btr->buf.sz - btr->buf.at; | |
372 | } | |
373 | ||
374 | static inline | |
375 | void consume_bits(struct bt_ctf_btr *btr, size_t incr) | |
376 | { | |
dfef8367 PP |
377 | BT_LOGV("Advancing cursor: btr-addr=%p, cur-before=%zu, cur-after=%zu", |
378 | btr, btr->buf.at, btr->buf.at + incr); | |
e98a2d6e PP |
379 | btr->buf.at += incr; |
380 | } | |
381 | ||
382 | static inline | |
383 | bool has_enough_bits(struct bt_ctf_btr *btr, size_t sz) | |
384 | { | |
385 | return available_bits(btr) >= sz; | |
386 | } | |
387 | ||
388 | static inline | |
389 | bool at_least_one_bit_left(struct bt_ctf_btr *btr) | |
390 | { | |
391 | return has_enough_bits(btr, 1); | |
392 | } | |
393 | ||
394 | static inline | |
395 | size_t packet_at(struct bt_ctf_btr *btr) | |
396 | { | |
397 | return btr->buf.packet_offset + btr->buf.at; | |
398 | } | |
399 | ||
400 | static inline | |
401 | size_t buf_at_from_addr(struct bt_ctf_btr *btr) | |
402 | { | |
403 | /* | |
404 | * Considering this: | |
405 | * | |
406 | * ====== offset ===== (17) | |
407 | * | |
408 | * xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx | |
409 | * ^ | |
410 | * addr (0) ==== at ==== (12) | |
411 | * | |
412 | * We want this: | |
413 | * | |
414 | * =============================== (29) | |
415 | */ | |
416 | return btr->buf.offset + btr->buf.at; | |
417 | } | |
418 | ||
419 | static inline | |
420 | int get_basic_field_type_size(struct bt_ctf_btr *btr, | |
dfef8367 | 421 | struct bt_ctf_field_type *field_type) |
e98a2d6e PP |
422 | { |
423 | int size; | |
424 | ||
425 | switch (bt_ctf_field_type_get_type_id(field_type)) { | |
1487a16a | 426 | case BT_CTF_FIELD_TYPE_ID_INTEGER: |
e98a2d6e PP |
427 | size = bt_ctf_field_type_integer_get_size(field_type); |
428 | break; | |
1487a16a | 429 | case BT_CTF_FIELD_TYPE_ID_FLOAT: |
e98a2d6e PP |
430 | { |
431 | int exp_dig, mant_dig; | |
432 | ||
433 | exp_dig = | |
434 | bt_ctf_field_type_floating_point_get_exponent_digits( | |
435 | field_type); | |
436 | mant_dig = | |
437 | bt_ctf_field_type_floating_point_get_mantissa_digits( | |
438 | field_type); | |
dfef8367 PP |
439 | assert(exp_dig >= 0); |
440 | assert(mant_dig >= 0); | |
e98a2d6e PP |
441 | size = exp_dig + mant_dig; |
442 | break; | |
443 | } | |
1487a16a | 444 | case BT_CTF_FIELD_TYPE_ID_ENUM: |
e98a2d6e PP |
445 | { |
446 | struct bt_ctf_field_type *int_type; | |
447 | ||
448 | int_type = bt_ctf_field_type_enumeration_get_container_type( | |
449 | field_type); | |
dfef8367 | 450 | assert(int_type); |
e98a2d6e PP |
451 | size = get_basic_field_type_size(btr, int_type); |
452 | BT_PUT(int_type); | |
453 | break; | |
454 | } | |
455 | default: | |
456 | size = BT_CTF_BTR_STATUS_ERROR; | |
457 | break; | |
458 | } | |
459 | ||
e98a2d6e PP |
460 | return size; |
461 | } | |
462 | ||
463 | static | |
464 | void stitch_reset(struct bt_ctf_btr *btr) | |
465 | { | |
466 | btr->stitch.offset = 0; | |
467 | btr->stitch.at = 0; | |
468 | } | |
469 | ||
470 | static inline | |
471 | size_t stitch_at_from_addr(struct bt_ctf_btr *btr) | |
472 | { | |
473 | return btr->stitch.offset + btr->stitch.at; | |
474 | } | |
475 | ||
476 | static | |
477 | void stitch_append_from_buf(struct bt_ctf_btr *btr, size_t sz) | |
478 | { | |
479 | size_t stitch_byte_at; | |
480 | size_t buf_byte_at; | |
481 | size_t nb_bytes;; | |
482 | ||
483 | if (sz == 0) { | |
484 | return; | |
485 | } | |
486 | ||
487 | stitch_byte_at = | |
488 | BITS_TO_BYTES_FLOOR(stitch_at_from_addr(btr)); | |
489 | buf_byte_at = BITS_TO_BYTES_FLOOR(buf_at_from_addr(btr)); | |
490 | nb_bytes = BITS_TO_BYTES_CEIL(sz); | |
491 | assert(nb_bytes > 0); | |
492 | memcpy(&btr->stitch.buf[stitch_byte_at], &btr->buf.addr[buf_byte_at], | |
493 | nb_bytes); | |
494 | btr->stitch.at += sz; | |
495 | consume_bits(btr, sz); | |
496 | } | |
497 | ||
498 | static | |
499 | void stitch_append_from_remaining_buf(struct bt_ctf_btr *btr) | |
500 | { | |
501 | stitch_append_from_buf(btr, available_bits(btr)); | |
502 | } | |
503 | ||
504 | static | |
505 | void stitch_set_from_remaining_buf(struct bt_ctf_btr *btr) | |
506 | { | |
507 | stitch_reset(btr); | |
508 | btr->stitch.offset = IN_BYTE_OFFSET(buf_at_from_addr(btr)); | |
509 | stitch_append_from_remaining_buf(btr); | |
510 | } | |
511 | ||
512 | static inline | |
513 | enum bt_ctf_btr_status read_unsigned_bitfield(const uint8_t *buf, size_t at, | |
dfef8367 | 514 | int64_t field_size, enum bt_ctf_byte_order bo, uint64_t *v) |
e98a2d6e PP |
515 | { |
516 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
517 | ||
518 | switch (bo) { | |
519 | case BT_CTF_BYTE_ORDER_BIG_ENDIAN: | |
520 | case BT_CTF_BYTE_ORDER_NETWORK: | |
521 | bt_bitfield_read_be(buf, uint8_t, at, field_size, v); | |
522 | break; | |
523 | case BT_CTF_BYTE_ORDER_LITTLE_ENDIAN: | |
524 | bt_bitfield_read_le(buf, uint8_t, at, field_size, v); | |
525 | break; | |
526 | default: | |
dfef8367 PP |
527 | BT_LOGF("Cannot read unsigned bit array: unknown byte order: bo=%d", bo); |
528 | abort(); | |
e98a2d6e PP |
529 | } |
530 | ||
dfef8367 PP |
531 | BT_LOGV("Read unsigned bit array: cur=%zu, size=%" PRId64 ", " |
532 | "bo=%s, val=%" PRIu64, at, field_size, | |
533 | bt_ctf_byte_order_string(bo), *v); | |
e98a2d6e PP |
534 | return status; |
535 | } | |
536 | ||
537 | static inline | |
538 | enum bt_ctf_btr_status read_signed_bitfield(const uint8_t *buf, size_t at, | |
dfef8367 | 539 | int64_t field_size, enum bt_ctf_byte_order bo, int64_t *v) |
e98a2d6e PP |
540 | { |
541 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
542 | ||
543 | switch (bo) { | |
544 | case BT_CTF_BYTE_ORDER_BIG_ENDIAN: | |
545 | case BT_CTF_BYTE_ORDER_NETWORK: | |
546 | bt_bitfield_read_be(buf, uint8_t, at, field_size, v); | |
547 | break; | |
548 | case BT_CTF_BYTE_ORDER_LITTLE_ENDIAN: | |
549 | bt_bitfield_read_le(buf, uint8_t, at, field_size, v); | |
550 | break; | |
551 | default: | |
dfef8367 PP |
552 | BT_LOGF("Cannot read signed bit array: unknown byte order: bo=%d", bo); |
553 | abort(); | |
e98a2d6e PP |
554 | } |
555 | ||
dfef8367 PP |
556 | BT_LOGV("Read signed bit array: cur=%zu, size=%" PRId64 ", " |
557 | "bo=%s, val=%" PRId64, at, field_size, | |
558 | bt_ctf_byte_order_string(bo), *v); | |
e98a2d6e PP |
559 | return status; |
560 | } | |
561 | ||
562 | typedef enum bt_ctf_btr_status (* read_basic_and_call_cb_t)(struct bt_ctf_btr *, | |
dfef8367 | 563 | const uint8_t *, size_t); |
e98a2d6e PP |
564 | |
565 | static inline | |
566 | enum bt_ctf_btr_status validate_contiguous_bo(struct bt_ctf_btr *btr, | |
dfef8367 | 567 | enum bt_ctf_byte_order next_bo) |
e98a2d6e PP |
568 | { |
569 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
570 | ||
571 | /* Always valid when at a byte boundary */ | |
572 | if (packet_at(btr) % 8 == 0) { | |
573 | goto end; | |
574 | } | |
575 | ||
576 | /* Always valid if last byte order is unknown */ | |
577 | if (btr->last_bo == BT_CTF_BYTE_ORDER_UNKNOWN) { | |
578 | goto end; | |
579 | } | |
580 | ||
581 | /* Always valid if next byte order is unknown */ | |
582 | if (next_bo == BT_CTF_BYTE_ORDER_UNKNOWN) { | |
583 | goto end; | |
584 | } | |
585 | ||
586 | /* Make sure last byte order is compatible with the next byte order */ | |
587 | switch (btr->last_bo) { | |
588 | case BT_CTF_BYTE_ORDER_BIG_ENDIAN: | |
589 | case BT_CTF_BYTE_ORDER_NETWORK: | |
590 | if (next_bo != BT_CTF_BYTE_ORDER_BIG_ENDIAN && | |
591 | next_bo != BT_CTF_BYTE_ORDER_NETWORK) { | |
592 | status = BT_CTF_BTR_STATUS_ERROR; | |
593 | } | |
594 | break; | |
595 | case BT_CTF_BYTE_ORDER_LITTLE_ENDIAN: | |
596 | if (next_bo != BT_CTF_BYTE_ORDER_LITTLE_ENDIAN) { | |
597 | status = BT_CTF_BTR_STATUS_ERROR; | |
598 | } | |
599 | break; | |
600 | default: | |
601 | status = BT_CTF_BTR_STATUS_ERROR; | |
602 | } | |
603 | ||
604 | end: | |
dfef8367 PP |
605 | if (status) { |
606 | BT_LOGW("Cannot read bit array: two different byte orders not at a byte boundary: " | |
607 | "btr-addr=%p, last-bo=%s, next-bo=%s", | |
608 | btr, bt_ctf_byte_order_string(btr->last_bo), | |
609 | bt_ctf_byte_order_string(next_bo)); | |
610 | } | |
611 | ||
e98a2d6e PP |
612 | return status; |
613 | } | |
614 | ||
615 | static | |
616 | enum bt_ctf_btr_status read_basic_float_and_call_cb(struct bt_ctf_btr *btr, | |
dfef8367 | 617 | const uint8_t *buf, size_t at) |
e98a2d6e PP |
618 | { |
619 | int ret; | |
620 | double dblval; | |
621 | int64_t field_size; | |
622 | enum bt_ctf_byte_order bo; | |
623 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
624 | ||
625 | field_size = get_basic_field_type_size(btr, btr->cur_basic_field_type); | |
626 | bo = bt_ctf_field_type_get_byte_order(btr->cur_basic_field_type); | |
627 | btr->cur_bo = bo; | |
628 | ||
629 | switch (field_size) { | |
630 | case 32: | |
631 | { | |
632 | uint64_t v; | |
633 | union { | |
634 | uint32_t u; | |
635 | float f; | |
636 | } f32; | |
637 | ||
638 | ret = bt_ctf_field_type_floating_point_get_mantissa_digits( | |
639 | btr->cur_basic_field_type); | |
640 | assert(ret == 24); | |
641 | ret = bt_ctf_field_type_floating_point_get_exponent_digits( | |
642 | btr->cur_basic_field_type); | |
643 | assert(ret == 8); | |
644 | status = read_unsigned_bitfield(buf, at, field_size, bo, &v); | |
645 | if (status != BT_CTF_BTR_STATUS_OK) { | |
dfef8367 PP |
646 | BT_LOGW("Cannot read unsigned 32-bit bit array for floating point number field: " |
647 | "btr-addr=%p, status=%s", | |
648 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
649 | goto end; |
650 | } | |
651 | ||
652 | f32.u = (uint32_t) v; | |
653 | dblval = (double) f32.f; | |
654 | break; | |
655 | } | |
656 | case 64: | |
657 | { | |
658 | union { | |
659 | uint64_t u; | |
660 | double d; | |
661 | } f64; | |
662 | ||
663 | ret = bt_ctf_field_type_floating_point_get_mantissa_digits( | |
664 | btr->cur_basic_field_type); | |
665 | assert(ret == 53); | |
666 | ret = bt_ctf_field_type_floating_point_get_exponent_digits( | |
667 | btr->cur_basic_field_type); | |
668 | assert(ret == 11); | |
669 | status = read_unsigned_bitfield(buf, at, field_size, bo, | |
670 | &f64.u); | |
671 | if (status != BT_CTF_BTR_STATUS_OK) { | |
dfef8367 PP |
672 | BT_LOGW("Cannot read unsigned 64-bit bit array for floating point number field: " |
673 | "btr-addr=%p, status=%s", | |
674 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
675 | goto end; |
676 | } | |
677 | ||
678 | dblval = f64.d; | |
679 | break; | |
680 | } | |
681 | default: | |
682 | /* Only 32-bit and 64-bit fields are supported currently */ | |
dfef8367 PP |
683 | BT_LOGW("Only 32-bit and 64-bit floating point number fields are supported: " |
684 | "btr-addr=%p", btr); | |
e98a2d6e PP |
685 | status = BT_CTF_BTR_STATUS_ERROR; |
686 | goto end; | |
687 | } | |
688 | ||
dfef8367 PP |
689 | BT_LOGV("Read floating point number value: btr=%p, cur=%zu, val=%f", |
690 | btr, at, dblval); | |
691 | ||
e98a2d6e | 692 | if (btr->user.cbs.types.floating_point) { |
dfef8367 | 693 | BT_LOGV("Calling user function (floating point number)."); |
e98a2d6e PP |
694 | status = btr->user.cbs.types.floating_point(dblval, |
695 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 PP |
696 | BT_LOGV("User function returned: status=%s", |
697 | bt_ctf_btr_status_string(status)); | |
698 | if (status != BT_CTF_BTR_STATUS_OK) { | |
699 | BT_LOGW("User function failed: btr-addr=%p, status=%s", | |
700 | btr, bt_ctf_btr_status_string(status)); | |
701 | } | |
e98a2d6e PP |
702 | } |
703 | ||
704 | end: | |
705 | return status; | |
706 | } | |
707 | ||
708 | static inline | |
709 | enum bt_ctf_btr_status read_basic_int_and_call(struct bt_ctf_btr *btr, | |
dfef8367 PP |
710 | const uint8_t *buf, size_t at, |
711 | struct bt_ctf_field_type *int_type, | |
712 | struct bt_ctf_field_type *orig_type) | |
e98a2d6e PP |
713 | { |
714 | int signd; | |
715 | int64_t field_size; | |
716 | enum bt_ctf_byte_order bo; | |
717 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
718 | ||
719 | signd = bt_ctf_field_type_integer_get_signed(int_type); | |
720 | field_size = get_basic_field_type_size(btr, int_type); | |
721 | if (field_size < 1) { | |
dfef8367 PP |
722 | BT_LOGW("Cannot get integer field type's size: " |
723 | "btr=%p, at=%zu, ft-addr=%p", | |
724 | btr, at, int_type); | |
e98a2d6e PP |
725 | status = BT_CTF_BTR_STATUS_ERROR; |
726 | goto end; | |
727 | } | |
728 | ||
729 | bo = bt_ctf_field_type_get_byte_order(int_type); | |
730 | ||
731 | /* | |
732 | * Update current byte order now because we could be reading | |
733 | * the integer value of an enumeration type, and thus we know | |
734 | * here the actual supporting integer type's byte order. | |
735 | */ | |
736 | btr->cur_bo = bo; | |
737 | ||
738 | if (signd) { | |
739 | int64_t v; | |
740 | ||
741 | status = read_signed_bitfield(buf, at, field_size, bo, &v); | |
742 | if (status != BT_CTF_BTR_STATUS_OK) { | |
dfef8367 PP |
743 | BT_LOGW("Cannot read signed bit array for signed integer field: " |
744 | "btr-addr=%p, status=%s", | |
745 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
746 | goto end; |
747 | } | |
748 | ||
749 | if (btr->user.cbs.types.signed_int) { | |
dfef8367 | 750 | BT_LOGV("Calling user function (signed integer)."); |
e98a2d6e PP |
751 | status = btr->user.cbs.types.signed_int(v, |
752 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 PP |
753 | BT_LOGV("User function returned: status=%s", |
754 | bt_ctf_btr_status_string(status)); | |
755 | if (status != BT_CTF_BTR_STATUS_OK) { | |
756 | BT_LOGW("User function failed: " | |
757 | "btr-addr=%p, status=%s", | |
758 | btr, bt_ctf_btr_status_string(status)); | |
759 | } | |
e98a2d6e PP |
760 | } |
761 | } else { | |
762 | uint64_t v; | |
763 | ||
764 | status = read_unsigned_bitfield(buf, at, field_size, bo, &v); | |
765 | if (status != BT_CTF_BTR_STATUS_OK) { | |
dfef8367 PP |
766 | BT_LOGW("Cannot read unsigned bit array for unsigned integer field: " |
767 | "btr-addr=%p, status=%s", | |
768 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
769 | goto end; |
770 | } | |
771 | ||
772 | if (btr->user.cbs.types.unsigned_int) { | |
dfef8367 | 773 | BT_LOGV("Calling user function (unsigned integer)."); |
e98a2d6e PP |
774 | status = btr->user.cbs.types.unsigned_int(v, |
775 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 PP |
776 | BT_LOGV("User function returned: status=%s", |
777 | bt_ctf_btr_status_string(status)); | |
778 | if (status != BT_CTF_BTR_STATUS_OK) { | |
779 | BT_LOGW("User function failed: " | |
780 | "btr-addr=%p, status=%s", | |
781 | btr, bt_ctf_btr_status_string(status)); | |
782 | } | |
e98a2d6e PP |
783 | } |
784 | } | |
785 | ||
786 | end: | |
787 | return status; | |
788 | } | |
789 | ||
790 | static | |
791 | enum bt_ctf_btr_status read_basic_int_and_call_cb(struct bt_ctf_btr *btr, | |
dfef8367 | 792 | const uint8_t *buf, size_t at) |
e98a2d6e PP |
793 | { |
794 | return read_basic_int_and_call(btr, buf, at, btr->cur_basic_field_type, | |
795 | btr->cur_basic_field_type); | |
796 | } | |
797 | ||
798 | static | |
799 | enum bt_ctf_btr_status read_basic_enum_and_call_cb(struct bt_ctf_btr *btr, | |
dfef8367 | 800 | const uint8_t *buf, size_t at) |
e98a2d6e PP |
801 | { |
802 | struct bt_ctf_field_type *int_field_type; | |
803 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
804 | ||
805 | int_field_type = bt_ctf_field_type_enumeration_get_container_type( | |
806 | btr->cur_basic_field_type); | |
dfef8367 | 807 | assert(int_field_type); |
e98a2d6e PP |
808 | status = read_basic_int_and_call(btr, buf, at, |
809 | int_field_type, btr->cur_basic_field_type); | |
dfef8367 | 810 | bt_put(int_field_type); |
e98a2d6e PP |
811 | return status; |
812 | } | |
813 | ||
814 | static inline | |
815 | enum bt_ctf_btr_status read_basic_type_and_call_continue(struct bt_ctf_btr *btr, | |
dfef8367 | 816 | read_basic_and_call_cb_t read_basic_and_call_cb) |
e98a2d6e PP |
817 | { |
818 | size_t available; | |
819 | int64_t field_size; | |
820 | int64_t needed_bits; | |
821 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
822 | ||
823 | if (!at_least_one_bit_left(btr)) { | |
dfef8367 | 824 | BT_LOGV("Reached end of data: btr-addr=%p", btr); |
e98a2d6e PP |
825 | status = BT_CTF_BTR_STATUS_EOF; |
826 | goto end; | |
827 | } | |
828 | ||
829 | field_size = get_basic_field_type_size(btr, btr->cur_basic_field_type); | |
830 | if (field_size < 1) { | |
dfef8367 PP |
831 | BT_LOGW("Cannot get basic field type's size: " |
832 | "btr-addr=%p, ft-addr=%p", | |
833 | btr, btr->cur_basic_field_type); | |
e98a2d6e PP |
834 | status = BT_CTF_BTR_STATUS_ERROR; |
835 | goto end; | |
836 | } | |
837 | ||
838 | available = available_bits(btr); | |
839 | needed_bits = field_size - btr->stitch.at; | |
dfef8367 PP |
840 | BT_LOGV("Continuing basic field decoding: " |
841 | "btr-addr=%p, field-size=%" PRId64 ", needed-size=%" PRId64 ", " | |
842 | "available-size=%zu", | |
843 | btr, field_size, needed_bits, available); | |
e98a2d6e PP |
844 | if (needed_bits <= available) { |
845 | /* We have all the bits; append to stitch, then decode */ | |
846 | stitch_append_from_buf(btr, needed_bits); | |
847 | status = read_basic_and_call_cb(btr, btr->stitch.buf, | |
848 | btr->stitch.offset); | |
849 | if (status != BT_CTF_BTR_STATUS_OK) { | |
dfef8367 PP |
850 | BT_LOGW("Cannot read basic field: " |
851 | "btr-addr=%p, ft-addr=%p, status=%s", | |
852 | btr, btr->cur_basic_field_type, | |
853 | bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
854 | goto end; |
855 | } | |
856 | ||
857 | if (stack_empty(btr->stack)) { | |
858 | /* Root is a basic type */ | |
859 | btr->state = BTR_STATE_DONE; | |
860 | } else { | |
861 | /* Go to next field */ | |
862 | stack_top(btr->stack)->index++; | |
863 | btr->state = BTR_STATE_NEXT_FIELD; | |
864 | btr->last_bo = btr->cur_bo; | |
865 | } | |
866 | goto end; | |
867 | } | |
868 | ||
869 | /* We are here; it means we don't have enough data to decode this */ | |
dfef8367 | 870 | BT_LOGV_STR("Not enough data to read the next basic field: appending to stitch buffer."); |
e98a2d6e PP |
871 | stitch_append_from_remaining_buf(btr); |
872 | status = BT_CTF_BTR_STATUS_EOF; | |
873 | ||
874 | end: | |
875 | return status; | |
876 | } | |
877 | ||
878 | static inline | |
879 | enum bt_ctf_btr_status read_basic_type_and_call_begin(struct bt_ctf_btr *btr, | |
dfef8367 | 880 | read_basic_and_call_cb_t read_basic_and_call_cb) |
e98a2d6e PP |
881 | { |
882 | size_t available; | |
883 | int64_t field_size; | |
884 | enum bt_ctf_byte_order bo; | |
885 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
886 | ||
887 | if (!at_least_one_bit_left(btr)) { | |
dfef8367 | 888 | BT_LOGV("Reached end of data: btr-addr=%p", btr); |
e98a2d6e PP |
889 | status = BT_CTF_BTR_STATUS_EOF; |
890 | goto end; | |
891 | } | |
892 | ||
893 | field_size = get_basic_field_type_size(btr, btr->cur_basic_field_type); | |
e98a2d6e | 894 | if (field_size < 1) { |
dfef8367 PP |
895 | BT_LOGW("Cannot get basic field type's size: " |
896 | "btr-addr=%p, ft-addr=%p", | |
897 | btr, btr->cur_basic_field_type); | |
e98a2d6e PP |
898 | status = BT_CTF_BTR_STATUS_ERROR; |
899 | goto end; | |
900 | } | |
901 | ||
902 | bo = bt_ctf_field_type_get_byte_order(btr->cur_basic_field_type); | |
903 | status = validate_contiguous_bo(btr, bo); | |
e98a2d6e | 904 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 | 905 | /* validate_contiguous_bo() logs errors */ |
e98a2d6e PP |
906 | goto end; |
907 | } | |
908 | ||
909 | available = available_bits(btr); | |
910 | ||
911 | if (field_size <= available) { | |
912 | /* We have all the bits; decode and set now */ | |
913 | status = read_basic_and_call_cb(btr, btr->buf.addr, | |
914 | buf_at_from_addr(btr)); | |
e98a2d6e | 915 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
916 | BT_LOGW("Cannot read basic field: " |
917 | "btr-addr=%p, ft-addr=%p, status=%s", | |
918 | btr, btr->cur_basic_field_type, | |
919 | bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
920 | goto end; |
921 | } | |
922 | ||
923 | consume_bits(btr, field_size); | |
924 | ||
925 | if (stack_empty(btr->stack)) { | |
926 | /* Root is a basic type */ | |
927 | btr->state = BTR_STATE_DONE; | |
928 | } else { | |
929 | /* Go to next field */ | |
930 | stack_top(btr->stack)->index++; | |
931 | btr->state = BTR_STATE_NEXT_FIELD; | |
932 | btr->last_bo = btr->cur_bo; | |
933 | } | |
934 | ||
935 | goto end; | |
936 | } | |
937 | ||
938 | /* We are here; it means we don't have enough data to decode this */ | |
dfef8367 | 939 | BT_LOGV_STR("Not enough data to read the next basic field: setting stitch buffer."); |
e98a2d6e PP |
940 | stitch_set_from_remaining_buf(btr); |
941 | btr->state = BTR_STATE_READ_BASIC_CONTINUE; | |
942 | status = BT_CTF_BTR_STATUS_EOF; | |
943 | ||
944 | end: | |
945 | return status; | |
946 | } | |
947 | ||
948 | static inline | |
949 | enum bt_ctf_btr_status read_basic_int_type_and_call_begin( | |
dfef8367 | 950 | struct bt_ctf_btr *btr) |
e98a2d6e PP |
951 | { |
952 | return read_basic_type_and_call_begin(btr, read_basic_int_and_call_cb); | |
953 | } | |
954 | ||
955 | static inline | |
956 | enum bt_ctf_btr_status read_basic_int_type_and_call_continue( | |
dfef8367 | 957 | struct bt_ctf_btr *btr) |
e98a2d6e PP |
958 | { |
959 | return read_basic_type_and_call_continue(btr, | |
960 | read_basic_int_and_call_cb); | |
961 | } | |
962 | ||
963 | static inline | |
964 | enum bt_ctf_btr_status read_basic_float_type_and_call_begin( | |
dfef8367 | 965 | struct bt_ctf_btr *btr) |
e98a2d6e PP |
966 | { |
967 | return read_basic_type_and_call_begin(btr, | |
968 | read_basic_float_and_call_cb); | |
969 | } | |
970 | ||
971 | static inline | |
972 | enum bt_ctf_btr_status read_basic_float_type_and_call_continue( | |
dfef8367 | 973 | struct bt_ctf_btr *btr) |
e98a2d6e PP |
974 | { |
975 | return read_basic_type_and_call_continue(btr, | |
976 | read_basic_float_and_call_cb); | |
977 | } | |
978 | ||
979 | static inline | |
980 | enum bt_ctf_btr_status read_basic_enum_type_and_call_begin( | |
dfef8367 | 981 | struct bt_ctf_btr *btr) |
e98a2d6e PP |
982 | { |
983 | return read_basic_type_and_call_begin(btr, | |
984 | read_basic_enum_and_call_cb); | |
985 | } | |
986 | ||
987 | static inline | |
988 | enum bt_ctf_btr_status read_basic_enum_type_and_call_continue( | |
dfef8367 | 989 | struct bt_ctf_btr *btr) |
e98a2d6e PP |
990 | { |
991 | return read_basic_type_and_call_continue(btr, | |
992 | read_basic_enum_and_call_cb); | |
993 | } | |
994 | ||
995 | static inline | |
996 | enum bt_ctf_btr_status read_basic_string_type_and_call( | |
dfef8367 | 997 | struct bt_ctf_btr *btr, bool begin) |
e98a2d6e PP |
998 | { |
999 | size_t buf_at_bytes; | |
1000 | const uint8_t *result; | |
1001 | size_t available_bytes; | |
1002 | const uint8_t *first_chr; | |
1003 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1004 | ||
1005 | if (!at_least_one_bit_left(btr)) { | |
dfef8367 | 1006 | BT_LOGV("Reached end of data: btr-addr=%p", btr); |
e98a2d6e PP |
1007 | status = BT_CTF_BTR_STATUS_EOF; |
1008 | goto end; | |
1009 | } | |
1010 | ||
1011 | assert(buf_at_from_addr(btr) % 8 == 0); | |
1012 | available_bytes = BITS_TO_BYTES_FLOOR(available_bits(btr)); | |
1013 | buf_at_bytes = BITS_TO_BYTES_FLOOR(buf_at_from_addr(btr)); | |
1014 | first_chr = &btr->buf.addr[buf_at_bytes]; | |
1015 | result = memchr(first_chr, '\0', available_bytes); | |
1016 | ||
1017 | if (begin && btr->user.cbs.types.string_begin) { | |
dfef8367 | 1018 | BT_LOGV("Calling user function (string, beginning)."); |
e98a2d6e PP |
1019 | status = btr->user.cbs.types.string_begin( |
1020 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 PP |
1021 | BT_LOGV("User function returned: status=%s", |
1022 | bt_ctf_btr_status_string(status)); | |
e98a2d6e | 1023 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1024 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
1025 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1026 | goto end; |
1027 | } | |
1028 | } | |
1029 | ||
1030 | if (!result) { | |
1031 | /* No null character yet */ | |
1032 | if (btr->user.cbs.types.string) { | |
dfef8367 | 1033 | BT_LOGV("Calling user function (substring)."); |
e98a2d6e PP |
1034 | status = btr->user.cbs.types.string( |
1035 | (const char *) first_chr, | |
1036 | available_bytes, btr->cur_basic_field_type, | |
1037 | btr->user.data); | |
dfef8367 PP |
1038 | BT_LOGV("User function returned: status=%s", |
1039 | bt_ctf_btr_status_string(status)); | |
e98a2d6e | 1040 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1041 | BT_LOGW("User function failed: " |
1042 | "btr-addr=%p, status=%s", | |
1043 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1044 | goto end; |
1045 | } | |
1046 | } | |
1047 | ||
1048 | consume_bits(btr, BYTES_TO_BITS(available_bytes)); | |
1049 | btr->state = BTR_STATE_READ_BASIC_CONTINUE; | |
1050 | status = BT_CTF_BTR_STATUS_EOF; | |
1051 | } else { | |
1052 | /* Found the null character */ | |
1053 | size_t result_len = (size_t) (result - first_chr); | |
1054 | ||
1055 | if (btr->user.cbs.types.string && result_len) { | |
dfef8367 | 1056 | BT_LOGV("Calling user function (substring)."); |
e98a2d6e PP |
1057 | status = btr->user.cbs.types.string( |
1058 | (const char *) first_chr, | |
1059 | result_len, btr->cur_basic_field_type, | |
1060 | btr->user.data); | |
dfef8367 PP |
1061 | BT_LOGV("User function returned: status=%s", |
1062 | bt_ctf_btr_status_string(status)); | |
e98a2d6e | 1063 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1064 | BT_LOGW("User function failed: " |
1065 | "btr-addr=%p, status=%s", | |
1066 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1067 | goto end; |
1068 | } | |
1069 | } | |
1070 | ||
1071 | if (btr->user.cbs.types.string_end) { | |
dfef8367 | 1072 | BT_LOGV("Calling user function (string, end)."); |
e98a2d6e PP |
1073 | status = btr->user.cbs.types.string_end( |
1074 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 PP |
1075 | BT_LOGV("User function returned: status=%s", |
1076 | bt_ctf_btr_status_string(status)); | |
e98a2d6e | 1077 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1078 | BT_LOGW("User function failed: " |
1079 | "btr-addr=%p, status=%s", | |
1080 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1081 | goto end; |
1082 | } | |
1083 | } | |
1084 | ||
1085 | consume_bits(btr, BYTES_TO_BITS(result_len + 1)); | |
1086 | ||
1087 | if (stack_empty(btr->stack)) { | |
1088 | /* Root is a basic type */ | |
1089 | btr->state = BTR_STATE_DONE; | |
1090 | } else { | |
1091 | /* Go to next field */ | |
1092 | stack_top(btr->stack)->index++; | |
1093 | btr->state = BTR_STATE_NEXT_FIELD; | |
1094 | btr->last_bo = btr->cur_bo; | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | end: | |
1099 | return status; | |
1100 | } | |
1101 | ||
1102 | static inline | |
1103 | enum bt_ctf_btr_status read_basic_begin_state(struct bt_ctf_btr *btr) | |
1104 | { | |
1105 | enum bt_ctf_btr_status status; | |
1106 | ||
1107 | assert(btr->cur_basic_field_type); | |
1108 | ||
1109 | switch (bt_ctf_field_type_get_type_id(btr->cur_basic_field_type)) { | |
1487a16a | 1110 | case BT_CTF_FIELD_TYPE_ID_INTEGER: |
e98a2d6e PP |
1111 | status = read_basic_int_type_and_call_begin(btr); |
1112 | break; | |
1487a16a | 1113 | case BT_CTF_FIELD_TYPE_ID_FLOAT: |
e98a2d6e PP |
1114 | status = read_basic_float_type_and_call_begin(btr); |
1115 | break; | |
1487a16a | 1116 | case BT_CTF_FIELD_TYPE_ID_ENUM: |
e98a2d6e PP |
1117 | status = read_basic_enum_type_and_call_begin(btr); |
1118 | break; | |
1487a16a | 1119 | case BT_CTF_FIELD_TYPE_ID_STRING: |
e98a2d6e PP |
1120 | status = read_basic_string_type_and_call(btr, true); |
1121 | break; | |
1122 | default: | |
dfef8367 PP |
1123 | BT_LOGF("Unknown basic field type ID: " |
1124 | "btr-addr=%p, ft-addr=%p, ft-id=%s", | |
1125 | btr, btr->cur_basic_field_type, | |
1126 | bt_ctf_field_type_id_string( | |
1127 | bt_ctf_field_type_get_type_id( | |
1128 | btr->cur_basic_field_type))); | |
0fbb9a9f | 1129 | abort(); |
e98a2d6e PP |
1130 | } |
1131 | ||
1132 | return status; | |
1133 | } | |
1134 | ||
1135 | static inline | |
1136 | enum bt_ctf_btr_status read_basic_continue_state(struct bt_ctf_btr *btr) | |
1137 | { | |
1138 | enum bt_ctf_btr_status status; | |
1139 | ||
1140 | assert(btr->cur_basic_field_type); | |
1141 | ||
1142 | switch (bt_ctf_field_type_get_type_id(btr->cur_basic_field_type)) { | |
1487a16a | 1143 | case BT_CTF_FIELD_TYPE_ID_INTEGER: |
e98a2d6e PP |
1144 | status = read_basic_int_type_and_call_continue(btr); |
1145 | break; | |
1487a16a | 1146 | case BT_CTF_FIELD_TYPE_ID_FLOAT: |
e98a2d6e PP |
1147 | status = read_basic_float_type_and_call_continue(btr); |
1148 | break; | |
1487a16a | 1149 | case BT_CTF_FIELD_TYPE_ID_ENUM: |
e98a2d6e PP |
1150 | status = read_basic_enum_type_and_call_continue(btr); |
1151 | break; | |
1487a16a | 1152 | case BT_CTF_FIELD_TYPE_ID_STRING: |
e98a2d6e PP |
1153 | status = read_basic_string_type_and_call(btr, false); |
1154 | break; | |
1155 | default: | |
dfef8367 PP |
1156 | BT_LOGF("Unknown basic field type ID: " |
1157 | "btr-addr=%p, ft-addr=%p, ft-id=%s", | |
1158 | btr, btr->cur_basic_field_type, | |
1159 | bt_ctf_field_type_id_string( | |
1160 | bt_ctf_field_type_get_type_id( | |
1161 | btr->cur_basic_field_type))); | |
0fbb9a9f | 1162 | abort(); |
e98a2d6e PP |
1163 | } |
1164 | ||
1165 | return status; | |
1166 | } | |
1167 | ||
1168 | static inline | |
1169 | size_t bits_to_skip_to_align_to(struct bt_ctf_btr *btr, size_t align) | |
1170 | { | |
1171 | size_t aligned_packet_at; | |
1172 | ||
1173 | aligned_packet_at = ALIGN(packet_at(btr), align); | |
e98a2d6e PP |
1174 | return aligned_packet_at - packet_at(btr); |
1175 | } | |
1176 | ||
1177 | static inline | |
1178 | enum bt_ctf_btr_status align_type_state(struct bt_ctf_btr *btr, | |
dfef8367 | 1179 | struct bt_ctf_field_type *field_type, enum btr_state next_state) |
e98a2d6e PP |
1180 | { |
1181 | int field_alignment; | |
1182 | size_t skip_bits; | |
1183 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1184 | ||
1185 | /* Get field's alignment */ | |
1186 | field_alignment = bt_ctf_field_type_get_alignment(field_type); | |
1187 | if (field_alignment < 0) { | |
dfef8367 PP |
1188 | BT_LOGW("Cannot get field type's alignment: " |
1189 | "btr-addr=%p, ft-addr=%p, ft-id=%s", | |
1190 | btr, field_type, | |
1191 | bt_ctf_field_type_id_string( | |
1192 | bt_ctf_field_type_get_type_id(field_type))); | |
e98a2d6e PP |
1193 | status = BT_CTF_BTR_STATUS_ERROR; |
1194 | goto end; | |
1195 | } | |
1196 | ||
1197 | /* | |
1198 | * 0 means "undefined" for variants; what we really want is 1 | |
1199 | * (always aligned) | |
1200 | */ | |
1201 | if (field_alignment == 0) { | |
1202 | field_alignment = 1; | |
1203 | } | |
1204 | ||
1205 | /* Compute how many bits we need to skip */ | |
1206 | skip_bits = bits_to_skip_to_align_to(btr, field_alignment); | |
1207 | ||
1208 | /* Nothing to skip? aligned */ | |
1209 | if (skip_bits == 0) { | |
1210 | btr->state = next_state; | |
1211 | goto end; | |
1212 | } | |
1213 | ||
1214 | /* Make sure there's at least one bit left */ | |
1215 | if (!at_least_one_bit_left(btr)) { | |
1216 | status = BT_CTF_BTR_STATUS_EOF; | |
1217 | goto end; | |
1218 | } | |
1219 | ||
1220 | /* Consume as many bits as possible in what's left */ | |
1221 | consume_bits(btr, MIN(available_bits(btr), skip_bits)); | |
1222 | ||
1223 | /* Are we done now? */ | |
1224 | skip_bits = bits_to_skip_to_align_to(btr, field_alignment); | |
e98a2d6e PP |
1225 | if (skip_bits == 0) { |
1226 | /* Yes: go to next state */ | |
1227 | btr->state = next_state; | |
1228 | goto end; | |
1229 | } else { | |
1230 | /* No: need more data */ | |
dfef8367 | 1231 | BT_LOGV("Reached end of data when aligning: btr-addr=%p", btr); |
e98a2d6e PP |
1232 | status = BT_CTF_BTR_STATUS_EOF; |
1233 | } | |
1234 | ||
1235 | end: | |
1236 | return status; | |
1237 | } | |
1238 | ||
1239 | static inline | |
1240 | bool is_compound_type(struct bt_ctf_field_type *field_type) | |
1241 | { | |
1487a16a | 1242 | enum bt_ctf_field_type_id id = bt_ctf_field_type_get_type_id(field_type); |
e98a2d6e | 1243 | |
1487a16a PP |
1244 | return id == BT_CTF_FIELD_TYPE_ID_STRUCT || id == BT_CTF_FIELD_TYPE_ID_ARRAY || |
1245 | id == BT_CTF_FIELD_TYPE_ID_SEQUENCE || id == BT_CTF_FIELD_TYPE_ID_VARIANT; | |
e98a2d6e PP |
1246 | } |
1247 | ||
1248 | static inline | |
1249 | enum bt_ctf_btr_status next_field_state(struct bt_ctf_btr *btr) | |
1250 | { | |
1251 | int ret; | |
1252 | struct stack_entry *top; | |
1253 | struct bt_ctf_field_type *next_field_type = NULL; | |
1254 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1255 | ||
1256 | if (stack_empty(btr->stack)) { | |
1257 | goto end; | |
1258 | } | |
1259 | ||
1260 | top = stack_top(btr->stack); | |
1261 | ||
1262 | /* Are we done with this base type? */ | |
1263 | while (top->index == top->base_len) { | |
1264 | if (btr->user.cbs.types.compound_end) { | |
dfef8367 | 1265 | BT_LOGV("Calling user function (compound, end)."); |
e98a2d6e PP |
1266 | status = btr->user.cbs.types.compound_end( |
1267 | top->base_type, btr->user.data); | |
dfef8367 PP |
1268 | BT_LOGV("User function returned: status=%s", |
1269 | bt_ctf_btr_status_string(status)); | |
e98a2d6e | 1270 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1271 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
1272 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1273 | goto end; |
1274 | } | |
1275 | } | |
1276 | ||
1277 | stack_pop(btr->stack); | |
1278 | ||
1279 | /* Are we done with the root type? */ | |
1280 | if (stack_empty(btr->stack)) { | |
1281 | btr->state = BTR_STATE_DONE; | |
1282 | goto end; | |
1283 | } | |
1284 | ||
1285 | top = stack_top(btr->stack); | |
1286 | top->index++; | |
1287 | } | |
1288 | ||
1289 | /* Get next field's type */ | |
1290 | switch (bt_ctf_field_type_get_type_id(top->base_type)) { | |
1487a16a | 1291 | case BT_CTF_FIELD_TYPE_ID_STRUCT: |
e98a2d6e PP |
1292 | ret = bt_ctf_field_type_structure_get_field( |
1293 | top->base_type, NULL, &next_field_type, | |
1294 | top->index); | |
1295 | if (ret) { | |
1296 | next_field_type = NULL; | |
1297 | } | |
1298 | break; | |
1487a16a | 1299 | case BT_CTF_FIELD_TYPE_ID_ARRAY: |
e98a2d6e PP |
1300 | next_field_type = |
1301 | bt_ctf_field_type_array_get_element_type( | |
1302 | top->base_type); | |
1303 | break; | |
1487a16a | 1304 | case BT_CTF_FIELD_TYPE_ID_SEQUENCE: |
e98a2d6e PP |
1305 | next_field_type = |
1306 | bt_ctf_field_type_sequence_get_element_type( | |
1307 | top->base_type); | |
1308 | break; | |
1487a16a | 1309 | case BT_CTF_FIELD_TYPE_ID_VARIANT: |
e98a2d6e PP |
1310 | /* Variant types are dynamic: query the user, he should know! */ |
1311 | next_field_type = | |
1312 | btr->user.cbs.query.get_variant_type( | |
1313 | top->base_type, btr->user.data); | |
1314 | break; | |
1315 | default: | |
1316 | break; | |
1317 | } | |
1318 | ||
1319 | if (!next_field_type) { | |
dfef8367 PP |
1320 | BT_LOGW("Cannot get the field type of the next field: " |
1321 | "btr-addr=%p, base-ft-addr=%p, base-ft-id=%s, " | |
1322 | "index=%" PRId64, | |
1323 | btr, top->base_type, | |
1324 | bt_ctf_field_type_id_string( | |
1325 | bt_ctf_field_type_get_type_id(top->base_type)), | |
1326 | top->index); | |
e98a2d6e PP |
1327 | status = BT_CTF_BTR_STATUS_ERROR; |
1328 | goto end; | |
1329 | } | |
1330 | ||
1331 | if (is_compound_type(next_field_type)) { | |
1332 | if (btr->user.cbs.types.compound_begin) { | |
dfef8367 | 1333 | BT_LOGV("Calling user function (compound, begin)."); |
e98a2d6e PP |
1334 | status = btr->user.cbs.types.compound_begin( |
1335 | next_field_type, btr->user.data); | |
dfef8367 PP |
1336 | BT_LOGV("User function returned: status=%s", |
1337 | bt_ctf_btr_status_string(status)); | |
e98a2d6e | 1338 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1339 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
1340 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1341 | goto end; |
1342 | } | |
1343 | } | |
1344 | ||
1345 | ret = stack_push_with_len(btr, next_field_type); | |
1346 | if (ret) { | |
dfef8367 | 1347 | /* stack_push_with_len() logs errors */ |
e98a2d6e PP |
1348 | status = BT_CTF_BTR_STATUS_ERROR; |
1349 | goto end; | |
1350 | } | |
1351 | ||
1352 | /* Next state: align a compound type */ | |
1353 | btr->state = BTR_STATE_ALIGN_COMPOUND; | |
1354 | } else { | |
1355 | /* Replace current basic field type */ | |
dfef8367 PP |
1356 | BT_LOGV("Replacing current basic field type: " |
1357 | "btr-addr=%p, cur-basic-ft-addr=%p, " | |
1358 | "next-basic-ft-addr=%p", | |
1359 | btr, btr->cur_basic_field_type, next_field_type); | |
e98a2d6e PP |
1360 | BT_MOVE(btr->cur_basic_field_type, next_field_type); |
1361 | ||
1362 | /* Next state: align a basic type */ | |
1363 | btr->state = BTR_STATE_ALIGN_BASIC; | |
1364 | } | |
1365 | ||
1366 | end: | |
1367 | BT_PUT(next_field_type); | |
1368 | ||
1369 | return status; | |
1370 | } | |
1371 | ||
1372 | static inline | |
1373 | enum bt_ctf_btr_status handle_state(struct bt_ctf_btr *btr) | |
1374 | { | |
1375 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1376 | ||
dfef8367 PP |
1377 | BT_LOGV("Handling state: btr-addr=%p, state=%s", |
1378 | btr, btr_state_string(btr->state)); | |
1379 | ||
e98a2d6e PP |
1380 | switch (btr->state) { |
1381 | case BTR_STATE_NEXT_FIELD: | |
1382 | status = next_field_state(btr); | |
1383 | break; | |
1384 | case BTR_STATE_ALIGN_BASIC: | |
1385 | status = align_type_state(btr, btr->cur_basic_field_type, | |
1386 | BTR_STATE_READ_BASIC_BEGIN); | |
1387 | break; | |
1388 | case BTR_STATE_ALIGN_COMPOUND: | |
1389 | status = align_type_state(btr, stack_top(btr->stack)->base_type, | |
1390 | BTR_STATE_NEXT_FIELD); | |
1391 | break; | |
1392 | case BTR_STATE_READ_BASIC_BEGIN: | |
1393 | status = read_basic_begin_state(btr); | |
1394 | break; | |
1395 | case BTR_STATE_READ_BASIC_CONTINUE: | |
1396 | status = read_basic_continue_state(btr); | |
1397 | break; | |
1398 | case BTR_STATE_DONE: | |
1399 | break; | |
1400 | } | |
1401 | ||
dfef8367 PP |
1402 | BT_LOGV("Handled state: btr-addr=%p, status=%s", |
1403 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1404 | return status; |
1405 | } | |
1406 | ||
1407 | struct bt_ctf_btr *bt_ctf_btr_create(struct bt_ctf_btr_cbs cbs, void *data, | |
1408 | FILE *err_stream) | |
1409 | { | |
1410 | struct bt_ctf_btr *btr; | |
1411 | ||
dfef8367 | 1412 | BT_LOGD_STR("Creating binary type reader (BTR)."); |
e98a2d6e PP |
1413 | btr = g_new0(struct bt_ctf_btr, 1); |
1414 | if (!btr) { | |
dfef8367 | 1415 | BT_LOGE_STR("Failed to allocate one binary type reader."); |
e98a2d6e PP |
1416 | goto end; |
1417 | } | |
1418 | ||
1419 | btr->stack = stack_new(); | |
1420 | if (!btr->stack) { | |
dfef8367 | 1421 | BT_LOGE_STR("Cannot create BTR's stack."); |
e98a2d6e PP |
1422 | bt_ctf_btr_destroy(btr); |
1423 | btr = NULL; | |
1424 | goto end; | |
1425 | } | |
1426 | ||
1427 | btr->state = BTR_STATE_NEXT_FIELD; | |
1428 | btr->user.cbs = cbs; | |
1429 | btr->user.data = data; | |
1430 | btr->err_stream = err_stream; | |
dfef8367 | 1431 | BT_LOGD("Created BTR: addr=%p", btr); |
e98a2d6e PP |
1432 | |
1433 | end: | |
1434 | return btr; | |
1435 | } | |
1436 | ||
1437 | void bt_ctf_btr_destroy(struct bt_ctf_btr *btr) | |
1438 | { | |
1439 | if (btr->stack) { | |
1440 | stack_destroy(btr->stack); | |
1441 | } | |
1442 | ||
dfef8367 | 1443 | BT_LOGD("Destroying BTR: addr=%p", btr); |
e98a2d6e PP |
1444 | BT_PUT(btr->cur_basic_field_type); |
1445 | g_free(btr); | |
1446 | } | |
1447 | ||
1448 | static | |
1449 | void reset(struct bt_ctf_btr *btr) | |
1450 | { | |
dfef8367 | 1451 | BT_LOGD("Resetting BTR: addr=%p", btr); |
e98a2d6e PP |
1452 | stack_clear(btr->stack); |
1453 | BT_PUT(btr->cur_basic_field_type); | |
1454 | stitch_reset(btr); | |
1455 | btr->buf.addr = NULL; | |
1456 | btr->last_bo = BT_CTF_BYTE_ORDER_UNKNOWN; | |
1457 | } | |
1458 | ||
dfef8367 PP |
1459 | static |
1460 | void update_packet_offset(struct bt_ctf_btr *btr) | |
1461 | { | |
1462 | BT_LOGV("Updating packet offset for next call: " | |
1463 | "btr-addr=%p, cur-packet-offset=%zu, next-packet-offset=%zu", | |
1464 | btr, btr->buf.packet_offset, | |
1465 | btr->buf.packet_offset + btr->buf.at); | |
1466 | btr->buf.packet_offset += btr->buf.at; | |
1467 | } | |
1468 | ||
e98a2d6e PP |
1469 | size_t bt_ctf_btr_start(struct bt_ctf_btr *btr, |
1470 | struct bt_ctf_field_type *type, const uint8_t *buf, | |
1471 | size_t offset, size_t packet_offset, size_t sz, | |
1472 | enum bt_ctf_btr_status *status) | |
1473 | { | |
1474 | assert(btr); | |
1475 | assert(buf); | |
1476 | assert(sz > 0); | |
1477 | assert(BYTES_TO_BITS(sz) > offset); | |
1478 | reset(btr); | |
1479 | btr->buf.addr = buf; | |
1480 | btr->buf.offset = offset; | |
1481 | btr->buf.at = 0; | |
1482 | btr->buf.packet_offset = packet_offset; | |
1483 | btr->buf.buf_sz = sz; | |
1484 | btr->buf.sz = BYTES_TO_BITS(sz) - offset; | |
1485 | *status = BT_CTF_BTR_STATUS_OK; | |
1486 | ||
dfef8367 PP |
1487 | BT_LOGV("Starting decoding: btr-addr=%p, ft-addr=%p, " |
1488 | "buf-addr=%p, buf-size=%zu, offset=%zu, " | |
1489 | "packet-offset=%zu", | |
1490 | btr, type, buf, sz, offset, packet_offset); | |
1491 | ||
e98a2d6e PP |
1492 | /* Set root type */ |
1493 | if (is_compound_type(type)) { | |
1494 | /* Compound type: push on visit stack */ | |
1495 | int stack_ret; | |
1496 | ||
1497 | if (btr->user.cbs.types.compound_begin) { | |
dfef8367 | 1498 | BT_LOGV("Calling user function (compound, begin)."); |
e98a2d6e PP |
1499 | *status = btr->user.cbs.types.compound_begin( |
1500 | type, btr->user.data); | |
dfef8367 PP |
1501 | BT_LOGV("User function returned: status=%s", |
1502 | bt_ctf_btr_status_string(*status)); | |
e98a2d6e | 1503 | if (*status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1504 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
1505 | btr, bt_ctf_btr_status_string(*status)); | |
e98a2d6e PP |
1506 | goto end; |
1507 | } | |
1508 | } | |
1509 | ||
1510 | stack_ret = stack_push_with_len(btr, type); | |
1511 | if (stack_ret) { | |
dfef8367 | 1512 | /* stack_push_with_len() logs errors */ |
e98a2d6e PP |
1513 | *status = BT_CTF_BTR_STATUS_ERROR; |
1514 | goto end; | |
1515 | } | |
1516 | ||
1517 | btr->state = BTR_STATE_ALIGN_COMPOUND; | |
1518 | } else { | |
1519 | /* Basic type: set as current basic type */ | |
1520 | btr->cur_basic_field_type = type; | |
1521 | bt_get(btr->cur_basic_field_type); | |
1522 | btr->state = BTR_STATE_ALIGN_BASIC; | |
1523 | } | |
1524 | ||
1525 | /* Run the machine! */ | |
dfef8367 PP |
1526 | BT_LOGV_STR("Running the state machine."); |
1527 | ||
e98a2d6e PP |
1528 | while (true) { |
1529 | *status = handle_state(btr); | |
1530 | if (*status != BT_CTF_BTR_STATUS_OK) { | |
1531 | break; | |
1532 | } else if (btr->state == BTR_STATE_DONE) { | |
1533 | break; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | /* Update packet offset for next time */ | |
dfef8367 | 1538 | update_packet_offset(btr); |
e98a2d6e PP |
1539 | |
1540 | end: | |
1541 | return btr->buf.at; | |
1542 | } | |
1543 | ||
1544 | size_t bt_ctf_btr_continue(struct bt_ctf_btr *btr, | |
1545 | const uint8_t *buf, size_t sz, | |
1546 | enum bt_ctf_btr_status *status) | |
1547 | { | |
1548 | assert(btr); | |
1549 | assert(buf); | |
1550 | assert(sz > 0); | |
1551 | btr->buf.addr = buf; | |
1552 | btr->buf.offset = 0; | |
1553 | btr->buf.at = 0; | |
1554 | btr->buf.buf_sz = sz; | |
1555 | btr->buf.sz = BYTES_TO_BITS(sz); | |
1556 | *status = BT_CTF_BTR_STATUS_OK; | |
1557 | ||
dfef8367 PP |
1558 | BT_LOGV("Continuing decoding: btr-addr=%p, buf-addr=%p, buf-size=%zu", |
1559 | btr, buf, sz); | |
1560 | ||
e98a2d6e | 1561 | /* Continue running the machine */ |
dfef8367 PP |
1562 | BT_LOGV_STR("Running the state machine."); |
1563 | ||
e98a2d6e PP |
1564 | while (true) { |
1565 | *status = handle_state(btr); | |
1566 | if (*status != BT_CTF_BTR_STATUS_OK) { | |
1567 | break; | |
1568 | } else if (btr->state == BTR_STATE_DONE) { | |
1569 | break; | |
1570 | } | |
1571 | } | |
1572 | ||
1573 | /* Update packet offset for next time */ | |
dfef8367 | 1574 | update_packet_offset(btr); |
e98a2d6e PP |
1575 | return btr->buf.at; |
1576 | } |