Commit | Line | Data |
---|---|---|
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 PP |
26 | #define BT_LOG_OUTPUT_LEVEL btr_log_level |
27 | #define BT_LOG_TAG "PLUGIN-CTF-BTR" | |
28 | #include <babeltrace/logging-internal.h> | |
29 | ||
30 | static int btr_log_level = BT_LOG_NONE; | |
31 | ||
0fbb9a9f | 32 | #include <stdlib.h> |
e98a2d6e | 33 | #include <stdint.h> |
dfef8367 | 34 | #include <inttypes.h> |
e98a2d6e PP |
35 | #include <stdio.h> |
36 | #include <stddef.h> | |
37 | #include <stdbool.h> | |
38 | #include <assert.h> | |
39 | #include <string.h> | |
3d9990ac | 40 | #include <babeltrace/bitfield-internal.h> |
e98a2d6e | 41 | #include <babeltrace/ctf-ir/field-types.h> |
dfef8367 | 42 | #include <babeltrace/ctf-ir/field-types-internal.h> |
e98a2d6e | 43 | #include <babeltrace/ref.h> |
3d9990ac | 44 | #include <babeltrace/align-internal.h> |
e98a2d6e PP |
45 | #include <glib.h> |
46 | ||
06a626b8 | 47 | #include "btr.h" |
e98a2d6e | 48 | |
cc491a8f | 49 | #define PRINT_ERR_STREAM (btr ? btr->err_stream : stderr) |
e98a2d6e | 50 | #define PRINT_PREFIX "ctf-btr" |
1e649dff | 51 | #include "../print.h" |
e98a2d6e PP |
52 | |
53 | #define DIV8(_x) ((_x) >> 3) | |
54 | #define BYTES_TO_BITS(_x) ((_x) * 8) | |
55 | #define BITS_TO_BYTES_FLOOR(_x) DIV8(_x) | |
56 | #define BITS_TO_BYTES_CEIL(_x) DIV8((_x) + 7) | |
57 | #define IN_BYTE_OFFSET(_at) ((_at) & 7) | |
58 | ||
59 | /* A visit stack entry */ | |
60 | struct stack_entry { | |
61 | /* | |
62 | * Current type of base field, one of: | |
63 | * | |
64 | * * Structure | |
65 | * * Array | |
66 | * * Sequence | |
67 | * * Variant | |
68 | * | |
69 | * Owned by this. | |
70 | */ | |
71 | struct bt_ctf_field_type *base_type; | |
72 | ||
73 | /* Length of base field (always 1 for variant types) */ | |
74 | int64_t base_len; | |
75 | ||
76 | /* Lndex of next field to read */ | |
77 | int64_t index; | |
78 | }; | |
79 | ||
80 | /* Visit stack */ | |
81 | struct stack { | |
82 | /* Entries (struct stack_entry *) (top is last element) */ | |
83 | GPtrArray *entries; | |
84 | }; | |
85 | ||
86 | /* Reading states */ | |
87 | enum btr_state { | |
88 | BTR_STATE_NEXT_FIELD, | |
89 | BTR_STATE_ALIGN_BASIC, | |
90 | BTR_STATE_ALIGN_COMPOUND, | |
91 | BTR_STATE_READ_BASIC_BEGIN, | |
92 | BTR_STATE_READ_BASIC_CONTINUE, | |
93 | BTR_STATE_DONE, | |
94 | }; | |
95 | ||
96 | /* Binary type reader */ | |
97 | struct bt_ctf_btr { | |
98 | /* Bisit stack */ | |
99 | struct stack *stack; | |
100 | ||
101 | /* Error stream */ | |
102 | FILE *err_stream; | |
103 | ||
104 | /* Current basic field type */ | |
105 | struct bt_ctf_field_type *cur_basic_field_type; | |
106 | ||
107 | /* Current state */ | |
108 | enum btr_state state; | |
109 | ||
110 | /* | |
111 | * Last basic field type's byte order. | |
112 | * | |
113 | * This is used to detect errors since two contiguous basic | |
114 | * types for which the common boundary is not the boundary of | |
115 | * a byte cannot have different byte orders. | |
116 | * | |
117 | * This is set to BT_CTF_BYTE_ORDER_UNKNOWN on reset and when | |
118 | * the last basic field type was a string type. | |
119 | */ | |
120 | enum bt_ctf_byte_order last_bo; | |
121 | ||
122 | /* Current byte order (copied to last_bo after a successful read) */ | |
123 | enum bt_ctf_byte_order cur_bo; | |
124 | ||
125 | /* Stitch buffer infos */ | |
126 | struct { | |
127 | /* Stitch buffer */ | |
128 | uint8_t buf[16]; | |
129 | ||
130 | /* Offset, within stitch buffer, of first bit */ | |
131 | size_t offset; | |
132 | ||
133 | /* Length (bits) of data in stitch buffer from offset */ | |
134 | size_t at; | |
135 | } stitch; | |
136 | ||
137 | /* User buffer infos */ | |
138 | struct { | |
139 | /* Address */ | |
140 | const uint8_t *addr; | |
141 | ||
142 | /* Offset of data from address (bits) */ | |
143 | size_t offset; | |
144 | ||
145 | /* Current position from offset (bits) */ | |
146 | size_t at; | |
147 | ||
148 | /* Offset of offset within whole packet (bits) */ | |
149 | size_t packet_offset; | |
150 | ||
151 | /* Data size in buffer (bits) */ | |
152 | size_t sz; | |
153 | ||
154 | /* Buffer size (bytes) */ | |
155 | size_t buf_sz; | |
156 | } buf; | |
157 | ||
158 | /* User stuff */ | |
159 | struct { | |
160 | /* Callback functions */ | |
161 | struct bt_ctf_btr_cbs cbs; | |
162 | ||
163 | /* Private data */ | |
164 | void *data; | |
165 | } user; | |
166 | }; | |
167 | ||
dfef8367 PP |
168 | static |
169 | void __attribute__((constructor)) logging_ctor(void) | |
170 | { | |
171 | btr_log_level = | |
172 | bt_log_get_level_from_env("BABELTRACE_PLUGIN_CTF_BTR_LOG_LEVEL"); | |
173 | } | |
174 | ||
175 | static inline | |
176 | const char *btr_state_string(enum btr_state state) | |
177 | { | |
178 | switch (state) { | |
179 | case BTR_STATE_NEXT_FIELD: | |
180 | return "BTR_STATE_NEXT_FIELD"; | |
181 | case BTR_STATE_ALIGN_BASIC: | |
182 | return "BTR_STATE_ALIGN_BASIC"; | |
183 | case BTR_STATE_ALIGN_COMPOUND: | |
184 | return "BTR_STATE_ALIGN_COMPOUND"; | |
185 | case BTR_STATE_READ_BASIC_BEGIN: | |
186 | return "BTR_STATE_READ_BASIC_BEGIN"; | |
187 | case BTR_STATE_READ_BASIC_CONTINUE: | |
188 | return "BTR_STATE_READ_BASIC_CONTINUE"; | |
189 | case BTR_STATE_DONE: | |
190 | return "BTR_STATE_DONE"; | |
191 | default: | |
192 | return "(unknown)"; | |
193 | } | |
194 | } | |
195 | ||
e98a2d6e PP |
196 | static |
197 | void stack_entry_free_func(gpointer data) | |
198 | { | |
199 | struct stack_entry *entry = data; | |
200 | ||
201 | BT_PUT(entry->base_type); | |
202 | g_free(entry); | |
203 | } | |
204 | ||
205 | static | |
206 | struct stack *stack_new(void) | |
207 | { | |
208 | struct stack *stack = NULL; | |
209 | ||
210 | stack = g_new0(struct stack, 1); | |
211 | if (!stack) { | |
dfef8367 | 212 | BT_LOGE_STR("Failed to allocate one stack."); |
e98a2d6e PP |
213 | goto error; |
214 | } | |
215 | ||
216 | stack->entries = g_ptr_array_new_with_free_func(stack_entry_free_func); | |
217 | if (!stack->entries) { | |
dfef8367 | 218 | BT_LOGE_STR("Failed to allocate a GPtrArray."); |
e98a2d6e PP |
219 | goto error; |
220 | } | |
221 | ||
dfef8367 | 222 | BT_LOGD("Created stack: addr=%p", stack); |
e98a2d6e PP |
223 | return stack; |
224 | ||
225 | error: | |
226 | g_free(stack); | |
227 | ||
228 | return NULL; | |
229 | } | |
230 | ||
231 | static | |
232 | void stack_destroy(struct stack *stack) | |
233 | { | |
234 | if (!stack) { | |
235 | return; | |
236 | } | |
237 | ||
dfef8367 | 238 | BT_LOGD("Destroying stack: addr=%p", stack); |
e98a2d6e PP |
239 | g_ptr_array_free(stack->entries, TRUE); |
240 | g_free(stack); | |
241 | } | |
242 | ||
243 | static inline | |
244 | int64_t get_compound_field_type_length(struct bt_ctf_btr *btr, | |
dfef8367 | 245 | struct bt_ctf_field_type *field_type) |
e98a2d6e PP |
246 | { |
247 | int64_t length; | |
248 | ||
249 | switch (bt_ctf_field_type_get_type_id(field_type)) { | |
1487a16a | 250 | case BT_CTF_FIELD_TYPE_ID_STRUCT: |
e98a2d6e PP |
251 | length = (int64_t) bt_ctf_field_type_structure_get_field_count( |
252 | field_type); | |
253 | break; | |
1487a16a | 254 | case BT_CTF_FIELD_TYPE_ID_VARIANT: |
e98a2d6e PP |
255 | /* Variant field types always "contain" a single type */ |
256 | length = 1; | |
257 | break; | |
1487a16a | 258 | case BT_CTF_FIELD_TYPE_ID_ARRAY: |
e98a2d6e PP |
259 | length = bt_ctf_field_type_array_get_length(field_type); |
260 | break; | |
1487a16a | 261 | case BT_CTF_FIELD_TYPE_ID_SEQUENCE: |
e98a2d6e PP |
262 | length = btr->user.cbs.query.get_sequence_length(field_type, |
263 | btr->user.data); | |
264 | break; | |
265 | default: | |
dfef8367 PP |
266 | BT_LOGW("Cannot get field type's field count: btr-addr=%p, " |
267 | "ft-addr=%p, ft-id=%s", | |
268 | btr, field_type, | |
269 | bt_ctf_field_type_id_string( | |
270 | bt_ctf_field_type_get_type_id(field_type))); | |
e98a2d6e PP |
271 | length = BT_CTF_BTR_STATUS_ERROR; |
272 | } | |
273 | ||
274 | return length; | |
275 | } | |
276 | ||
277 | static | |
278 | int stack_push(struct stack *stack, struct bt_ctf_field_type *base_type, | |
279 | size_t base_len) | |
280 | { | |
281 | int ret = 0; | |
282 | struct stack_entry *entry; | |
283 | ||
284 | assert(stack); | |
285 | assert(base_type); | |
286 | ||
dfef8367 PP |
287 | BT_LOGV("Pushing field type on stack: stack-addr=%p, " |
288 | "ft-addr=%p, ft-id=%s, base-length=%zu, " | |
289 | "stack-size-before=%u, stack-size-after=%u", | |
290 | stack, base_type, bt_ctf_field_type_id_string( | |
291 | bt_ctf_field_type_get_type_id(base_type)), | |
292 | base_len, stack->entries->len, stack->entries->len + 1); | |
e98a2d6e PP |
293 | entry = g_new0(struct stack_entry, 1); |
294 | if (!entry) { | |
dfef8367 PP |
295 | BT_LOGE("Failed to allocate one stack entry: stack-addr=%p", |
296 | stack); | |
e98a2d6e PP |
297 | ret = BT_CTF_BTR_STATUS_ERROR; |
298 | goto end; | |
299 | } | |
300 | ||
301 | entry->base_type = base_type; | |
302 | bt_get(entry->base_type); | |
303 | entry->base_len = base_len; | |
304 | g_ptr_array_add(stack->entries, entry); | |
305 | ||
306 | end: | |
307 | return ret; | |
308 | } | |
309 | ||
310 | static | |
311 | int stack_push_with_len(struct bt_ctf_btr *btr, | |
dfef8367 | 312 | struct bt_ctf_field_type *base_type) |
e98a2d6e PP |
313 | { |
314 | int ret = 0; | |
315 | int64_t base_len = get_compound_field_type_length(btr, base_type); | |
316 | ||
317 | if (base_len < 0) { | |
dfef8367 PP |
318 | BT_LOGW("Cannot get compound field type's field count: " |
319 | "btr-addr=%p, ft-addr=%p, ft-id=%s", | |
320 | btr, base_type, bt_ctf_field_type_id_string( | |
321 | bt_ctf_field_type_get_type_id(base_type))); | |
e98a2d6e PP |
322 | ret = BT_CTF_BTR_STATUS_ERROR; |
323 | goto end; | |
324 | } | |
325 | ||
326 | ret = stack_push(btr->stack, base_type, (size_t) base_len); | |
327 | ||
328 | end: | |
329 | return ret; | |
330 | } | |
331 | ||
332 | static inline | |
333 | unsigned int stack_size(struct stack *stack) | |
334 | { | |
335 | assert(stack); | |
336 | ||
337 | return stack->entries->len; | |
338 | } | |
339 | ||
340 | static | |
341 | void stack_pop(struct stack *stack) | |
342 | { | |
343 | assert(stack); | |
344 | assert(stack_size(stack)); | |
dfef8367 PP |
345 | BT_LOGV("Popping from stack: " |
346 | "stack-addr=%p, stack-size-before=%u, stack-size-after=%u", | |
347 | stack, stack->entries->len, stack->entries->len - 1); | |
e98a2d6e PP |
348 | g_ptr_array_remove_index(stack->entries, stack->entries->len - 1); |
349 | } | |
350 | ||
351 | static inline | |
352 | bool stack_empty(struct stack *stack) | |
353 | { | |
354 | return stack_size(stack) == 0; | |
355 | } | |
356 | ||
357 | static | |
358 | void stack_clear(struct stack *stack) | |
359 | { | |
360 | assert(stack); | |
361 | ||
362 | if (!stack_empty(stack)) { | |
363 | g_ptr_array_remove_range(stack->entries, 0, stack_size(stack)); | |
364 | } | |
365 | ||
366 | assert(stack_empty(stack)); | |
367 | } | |
368 | ||
369 | static inline | |
370 | struct stack_entry *stack_top(struct stack *stack) | |
371 | { | |
372 | assert(stack); | |
373 | assert(stack_size(stack)); | |
374 | ||
375 | return g_ptr_array_index(stack->entries, stack->entries->len - 1); | |
376 | } | |
377 | ||
378 | static inline | |
379 | size_t available_bits(struct bt_ctf_btr *btr) | |
380 | { | |
381 | return btr->buf.sz - btr->buf.at; | |
382 | } | |
383 | ||
384 | static inline | |
385 | void consume_bits(struct bt_ctf_btr *btr, size_t incr) | |
386 | { | |
dfef8367 PP |
387 | BT_LOGV("Advancing cursor: btr-addr=%p, cur-before=%zu, cur-after=%zu", |
388 | btr, btr->buf.at, btr->buf.at + incr); | |
e98a2d6e PP |
389 | btr->buf.at += incr; |
390 | } | |
391 | ||
392 | static inline | |
393 | bool has_enough_bits(struct bt_ctf_btr *btr, size_t sz) | |
394 | { | |
395 | return available_bits(btr) >= sz; | |
396 | } | |
397 | ||
398 | static inline | |
399 | bool at_least_one_bit_left(struct bt_ctf_btr *btr) | |
400 | { | |
401 | return has_enough_bits(btr, 1); | |
402 | } | |
403 | ||
404 | static inline | |
405 | size_t packet_at(struct bt_ctf_btr *btr) | |
406 | { | |
407 | return btr->buf.packet_offset + btr->buf.at; | |
408 | } | |
409 | ||
410 | static inline | |
411 | size_t buf_at_from_addr(struct bt_ctf_btr *btr) | |
412 | { | |
413 | /* | |
414 | * Considering this: | |
415 | * | |
416 | * ====== offset ===== (17) | |
417 | * | |
418 | * xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx | |
419 | * ^ | |
420 | * addr (0) ==== at ==== (12) | |
421 | * | |
422 | * We want this: | |
423 | * | |
424 | * =============================== (29) | |
425 | */ | |
426 | return btr->buf.offset + btr->buf.at; | |
427 | } | |
428 | ||
429 | static inline | |
430 | int get_basic_field_type_size(struct bt_ctf_btr *btr, | |
dfef8367 | 431 | struct bt_ctf_field_type *field_type) |
e98a2d6e PP |
432 | { |
433 | int size; | |
434 | ||
435 | switch (bt_ctf_field_type_get_type_id(field_type)) { | |
1487a16a | 436 | case BT_CTF_FIELD_TYPE_ID_INTEGER: |
e98a2d6e PP |
437 | size = bt_ctf_field_type_integer_get_size(field_type); |
438 | break; | |
1487a16a | 439 | case BT_CTF_FIELD_TYPE_ID_FLOAT: |
e98a2d6e PP |
440 | { |
441 | int exp_dig, mant_dig; | |
442 | ||
443 | exp_dig = | |
444 | bt_ctf_field_type_floating_point_get_exponent_digits( | |
445 | field_type); | |
446 | mant_dig = | |
447 | bt_ctf_field_type_floating_point_get_mantissa_digits( | |
448 | field_type); | |
dfef8367 PP |
449 | assert(exp_dig >= 0); |
450 | assert(mant_dig >= 0); | |
e98a2d6e PP |
451 | size = exp_dig + mant_dig; |
452 | break; | |
453 | } | |
1487a16a | 454 | case BT_CTF_FIELD_TYPE_ID_ENUM: |
e98a2d6e PP |
455 | { |
456 | struct bt_ctf_field_type *int_type; | |
457 | ||
458 | int_type = bt_ctf_field_type_enumeration_get_container_type( | |
459 | field_type); | |
dfef8367 | 460 | assert(int_type); |
e98a2d6e PP |
461 | size = get_basic_field_type_size(btr, int_type); |
462 | BT_PUT(int_type); | |
463 | break; | |
464 | } | |
465 | default: | |
466 | size = BT_CTF_BTR_STATUS_ERROR; | |
467 | break; | |
468 | } | |
469 | ||
e98a2d6e PP |
470 | return size; |
471 | } | |
472 | ||
473 | static | |
474 | void stitch_reset(struct bt_ctf_btr *btr) | |
475 | { | |
476 | btr->stitch.offset = 0; | |
477 | btr->stitch.at = 0; | |
478 | } | |
479 | ||
480 | static inline | |
481 | size_t stitch_at_from_addr(struct bt_ctf_btr *btr) | |
482 | { | |
483 | return btr->stitch.offset + btr->stitch.at; | |
484 | } | |
485 | ||
486 | static | |
487 | void stitch_append_from_buf(struct bt_ctf_btr *btr, size_t sz) | |
488 | { | |
489 | size_t stitch_byte_at; | |
490 | size_t buf_byte_at; | |
491 | size_t nb_bytes;; | |
492 | ||
493 | if (sz == 0) { | |
494 | return; | |
495 | } | |
496 | ||
497 | stitch_byte_at = | |
498 | BITS_TO_BYTES_FLOOR(stitch_at_from_addr(btr)); | |
499 | buf_byte_at = BITS_TO_BYTES_FLOOR(buf_at_from_addr(btr)); | |
500 | nb_bytes = BITS_TO_BYTES_CEIL(sz); | |
501 | assert(nb_bytes > 0); | |
502 | memcpy(&btr->stitch.buf[stitch_byte_at], &btr->buf.addr[buf_byte_at], | |
503 | nb_bytes); | |
504 | btr->stitch.at += sz; | |
505 | consume_bits(btr, sz); | |
506 | } | |
507 | ||
508 | static | |
509 | void stitch_append_from_remaining_buf(struct bt_ctf_btr *btr) | |
510 | { | |
511 | stitch_append_from_buf(btr, available_bits(btr)); | |
512 | } | |
513 | ||
514 | static | |
515 | void stitch_set_from_remaining_buf(struct bt_ctf_btr *btr) | |
516 | { | |
517 | stitch_reset(btr); | |
518 | btr->stitch.offset = IN_BYTE_OFFSET(buf_at_from_addr(btr)); | |
519 | stitch_append_from_remaining_buf(btr); | |
520 | } | |
521 | ||
522 | static inline | |
523 | enum bt_ctf_btr_status read_unsigned_bitfield(const uint8_t *buf, size_t at, | |
dfef8367 | 524 | int64_t field_size, enum bt_ctf_byte_order bo, uint64_t *v) |
e98a2d6e PP |
525 | { |
526 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
527 | ||
528 | switch (bo) { | |
529 | case BT_CTF_BYTE_ORDER_BIG_ENDIAN: | |
530 | case BT_CTF_BYTE_ORDER_NETWORK: | |
531 | bt_bitfield_read_be(buf, uint8_t, at, field_size, v); | |
532 | break; | |
533 | case BT_CTF_BYTE_ORDER_LITTLE_ENDIAN: | |
534 | bt_bitfield_read_le(buf, uint8_t, at, field_size, v); | |
535 | break; | |
536 | default: | |
dfef8367 PP |
537 | BT_LOGF("Cannot read unsigned bit array: unknown byte order: bo=%d", bo); |
538 | abort(); | |
e98a2d6e PP |
539 | } |
540 | ||
dfef8367 PP |
541 | BT_LOGV("Read unsigned bit array: cur=%zu, size=%" PRId64 ", " |
542 | "bo=%s, val=%" PRIu64, at, field_size, | |
543 | bt_ctf_byte_order_string(bo), *v); | |
e98a2d6e PP |
544 | return status; |
545 | } | |
546 | ||
547 | static inline | |
548 | enum bt_ctf_btr_status read_signed_bitfield(const uint8_t *buf, size_t at, | |
dfef8367 | 549 | int64_t field_size, enum bt_ctf_byte_order bo, int64_t *v) |
e98a2d6e PP |
550 | { |
551 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
552 | ||
553 | switch (bo) { | |
554 | case BT_CTF_BYTE_ORDER_BIG_ENDIAN: | |
555 | case BT_CTF_BYTE_ORDER_NETWORK: | |
556 | bt_bitfield_read_be(buf, uint8_t, at, field_size, v); | |
557 | break; | |
558 | case BT_CTF_BYTE_ORDER_LITTLE_ENDIAN: | |
559 | bt_bitfield_read_le(buf, uint8_t, at, field_size, v); | |
560 | break; | |
561 | default: | |
dfef8367 PP |
562 | BT_LOGF("Cannot read signed bit array: unknown byte order: bo=%d", bo); |
563 | abort(); | |
e98a2d6e PP |
564 | } |
565 | ||
dfef8367 PP |
566 | BT_LOGV("Read signed bit array: cur=%zu, size=%" PRId64 ", " |
567 | "bo=%s, val=%" PRId64, at, field_size, | |
568 | bt_ctf_byte_order_string(bo), *v); | |
e98a2d6e PP |
569 | return status; |
570 | } | |
571 | ||
572 | typedef enum bt_ctf_btr_status (* read_basic_and_call_cb_t)(struct bt_ctf_btr *, | |
dfef8367 | 573 | const uint8_t *, size_t); |
e98a2d6e PP |
574 | |
575 | static inline | |
576 | enum bt_ctf_btr_status validate_contiguous_bo(struct bt_ctf_btr *btr, | |
dfef8367 | 577 | enum bt_ctf_byte_order next_bo) |
e98a2d6e PP |
578 | { |
579 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
580 | ||
581 | /* Always valid when at a byte boundary */ | |
582 | if (packet_at(btr) % 8 == 0) { | |
583 | goto end; | |
584 | } | |
585 | ||
586 | /* Always valid if last byte order is unknown */ | |
587 | if (btr->last_bo == BT_CTF_BYTE_ORDER_UNKNOWN) { | |
588 | goto end; | |
589 | } | |
590 | ||
591 | /* Always valid if next byte order is unknown */ | |
592 | if (next_bo == BT_CTF_BYTE_ORDER_UNKNOWN) { | |
593 | goto end; | |
594 | } | |
595 | ||
596 | /* Make sure last byte order is compatible with the next byte order */ | |
597 | switch (btr->last_bo) { | |
598 | case BT_CTF_BYTE_ORDER_BIG_ENDIAN: | |
599 | case BT_CTF_BYTE_ORDER_NETWORK: | |
600 | if (next_bo != BT_CTF_BYTE_ORDER_BIG_ENDIAN && | |
601 | next_bo != BT_CTF_BYTE_ORDER_NETWORK) { | |
602 | status = BT_CTF_BTR_STATUS_ERROR; | |
603 | } | |
604 | break; | |
605 | case BT_CTF_BYTE_ORDER_LITTLE_ENDIAN: | |
606 | if (next_bo != BT_CTF_BYTE_ORDER_LITTLE_ENDIAN) { | |
607 | status = BT_CTF_BTR_STATUS_ERROR; | |
608 | } | |
609 | break; | |
610 | default: | |
611 | status = BT_CTF_BTR_STATUS_ERROR; | |
612 | } | |
613 | ||
614 | end: | |
dfef8367 PP |
615 | if (status) { |
616 | BT_LOGW("Cannot read bit array: two different byte orders not at a byte boundary: " | |
617 | "btr-addr=%p, last-bo=%s, next-bo=%s", | |
618 | btr, bt_ctf_byte_order_string(btr->last_bo), | |
619 | bt_ctf_byte_order_string(next_bo)); | |
620 | } | |
621 | ||
e98a2d6e PP |
622 | return status; |
623 | } | |
624 | ||
625 | static | |
626 | enum bt_ctf_btr_status read_basic_float_and_call_cb(struct bt_ctf_btr *btr, | |
dfef8367 | 627 | const uint8_t *buf, size_t at) |
e98a2d6e PP |
628 | { |
629 | int ret; | |
630 | double dblval; | |
631 | int64_t field_size; | |
632 | enum bt_ctf_byte_order bo; | |
633 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
634 | ||
635 | field_size = get_basic_field_type_size(btr, btr->cur_basic_field_type); | |
636 | bo = bt_ctf_field_type_get_byte_order(btr->cur_basic_field_type); | |
637 | btr->cur_bo = bo; | |
638 | ||
639 | switch (field_size) { | |
640 | case 32: | |
641 | { | |
642 | uint64_t v; | |
643 | union { | |
644 | uint32_t u; | |
645 | float f; | |
646 | } f32; | |
647 | ||
648 | ret = bt_ctf_field_type_floating_point_get_mantissa_digits( | |
649 | btr->cur_basic_field_type); | |
650 | assert(ret == 24); | |
651 | ret = bt_ctf_field_type_floating_point_get_exponent_digits( | |
652 | btr->cur_basic_field_type); | |
653 | assert(ret == 8); | |
654 | status = read_unsigned_bitfield(buf, at, field_size, bo, &v); | |
655 | if (status != BT_CTF_BTR_STATUS_OK) { | |
dfef8367 PP |
656 | BT_LOGW("Cannot read unsigned 32-bit bit array for floating point number field: " |
657 | "btr-addr=%p, status=%s", | |
658 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
659 | goto end; |
660 | } | |
661 | ||
662 | f32.u = (uint32_t) v; | |
663 | dblval = (double) f32.f; | |
664 | break; | |
665 | } | |
666 | case 64: | |
667 | { | |
668 | union { | |
669 | uint64_t u; | |
670 | double d; | |
671 | } f64; | |
672 | ||
673 | ret = bt_ctf_field_type_floating_point_get_mantissa_digits( | |
674 | btr->cur_basic_field_type); | |
675 | assert(ret == 53); | |
676 | ret = bt_ctf_field_type_floating_point_get_exponent_digits( | |
677 | btr->cur_basic_field_type); | |
678 | assert(ret == 11); | |
679 | status = read_unsigned_bitfield(buf, at, field_size, bo, | |
680 | &f64.u); | |
681 | if (status != BT_CTF_BTR_STATUS_OK) { | |
dfef8367 PP |
682 | BT_LOGW("Cannot read unsigned 64-bit bit array for floating point number field: " |
683 | "btr-addr=%p, status=%s", | |
684 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
685 | goto end; |
686 | } | |
687 | ||
688 | dblval = f64.d; | |
689 | break; | |
690 | } | |
691 | default: | |
692 | /* Only 32-bit and 64-bit fields are supported currently */ | |
dfef8367 PP |
693 | BT_LOGW("Only 32-bit and 64-bit floating point number fields are supported: " |
694 | "btr-addr=%p", btr); | |
e98a2d6e PP |
695 | status = BT_CTF_BTR_STATUS_ERROR; |
696 | goto end; | |
697 | } | |
698 | ||
dfef8367 PP |
699 | BT_LOGV("Read floating point number value: btr=%p, cur=%zu, val=%f", |
700 | btr, at, dblval); | |
701 | ||
e98a2d6e | 702 | if (btr->user.cbs.types.floating_point) { |
dfef8367 | 703 | BT_LOGV("Calling user function (floating point number)."); |
e98a2d6e PP |
704 | status = btr->user.cbs.types.floating_point(dblval, |
705 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 PP |
706 | BT_LOGV("User function returned: status=%s", |
707 | bt_ctf_btr_status_string(status)); | |
708 | if (status != BT_CTF_BTR_STATUS_OK) { | |
709 | BT_LOGW("User function failed: btr-addr=%p, status=%s", | |
710 | btr, bt_ctf_btr_status_string(status)); | |
711 | } | |
e98a2d6e PP |
712 | } |
713 | ||
714 | end: | |
715 | return status; | |
716 | } | |
717 | ||
718 | static inline | |
719 | enum bt_ctf_btr_status read_basic_int_and_call(struct bt_ctf_btr *btr, | |
dfef8367 PP |
720 | const uint8_t *buf, size_t at, |
721 | struct bt_ctf_field_type *int_type, | |
722 | struct bt_ctf_field_type *orig_type) | |
e98a2d6e PP |
723 | { |
724 | int signd; | |
725 | int64_t field_size; | |
726 | enum bt_ctf_byte_order bo; | |
727 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
728 | ||
729 | signd = bt_ctf_field_type_integer_get_signed(int_type); | |
730 | field_size = get_basic_field_type_size(btr, int_type); | |
731 | if (field_size < 1) { | |
dfef8367 PP |
732 | BT_LOGW("Cannot get integer field type's size: " |
733 | "btr=%p, at=%zu, ft-addr=%p", | |
734 | btr, at, int_type); | |
e98a2d6e PP |
735 | status = BT_CTF_BTR_STATUS_ERROR; |
736 | goto end; | |
737 | } | |
738 | ||
739 | bo = bt_ctf_field_type_get_byte_order(int_type); | |
740 | ||
741 | /* | |
742 | * Update current byte order now because we could be reading | |
743 | * the integer value of an enumeration type, and thus we know | |
744 | * here the actual supporting integer type's byte order. | |
745 | */ | |
746 | btr->cur_bo = bo; | |
747 | ||
748 | if (signd) { | |
749 | int64_t v; | |
750 | ||
751 | status = read_signed_bitfield(buf, at, field_size, bo, &v); | |
752 | if (status != BT_CTF_BTR_STATUS_OK) { | |
dfef8367 PP |
753 | BT_LOGW("Cannot read signed bit array for signed integer field: " |
754 | "btr-addr=%p, status=%s", | |
755 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
756 | goto end; |
757 | } | |
758 | ||
759 | if (btr->user.cbs.types.signed_int) { | |
dfef8367 | 760 | BT_LOGV("Calling user function (signed integer)."); |
e98a2d6e PP |
761 | status = btr->user.cbs.types.signed_int(v, |
762 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 PP |
763 | BT_LOGV("User function returned: status=%s", |
764 | bt_ctf_btr_status_string(status)); | |
765 | if (status != BT_CTF_BTR_STATUS_OK) { | |
766 | BT_LOGW("User function failed: " | |
767 | "btr-addr=%p, status=%s", | |
768 | btr, bt_ctf_btr_status_string(status)); | |
769 | } | |
e98a2d6e PP |
770 | } |
771 | } else { | |
772 | uint64_t v; | |
773 | ||
774 | status = read_unsigned_bitfield(buf, at, field_size, bo, &v); | |
775 | if (status != BT_CTF_BTR_STATUS_OK) { | |
dfef8367 PP |
776 | BT_LOGW("Cannot read unsigned bit array for unsigned integer field: " |
777 | "btr-addr=%p, status=%s", | |
778 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
779 | goto end; |
780 | } | |
781 | ||
782 | if (btr->user.cbs.types.unsigned_int) { | |
dfef8367 | 783 | BT_LOGV("Calling user function (unsigned integer)."); |
e98a2d6e PP |
784 | status = btr->user.cbs.types.unsigned_int(v, |
785 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 PP |
786 | BT_LOGV("User function returned: status=%s", |
787 | bt_ctf_btr_status_string(status)); | |
788 | if (status != BT_CTF_BTR_STATUS_OK) { | |
789 | BT_LOGW("User function failed: " | |
790 | "btr-addr=%p, status=%s", | |
791 | btr, bt_ctf_btr_status_string(status)); | |
792 | } | |
e98a2d6e PP |
793 | } |
794 | } | |
795 | ||
796 | end: | |
797 | return status; | |
798 | } | |
799 | ||
800 | static | |
801 | enum bt_ctf_btr_status read_basic_int_and_call_cb(struct bt_ctf_btr *btr, | |
dfef8367 | 802 | const uint8_t *buf, size_t at) |
e98a2d6e PP |
803 | { |
804 | return read_basic_int_and_call(btr, buf, at, btr->cur_basic_field_type, | |
805 | btr->cur_basic_field_type); | |
806 | } | |
807 | ||
808 | static | |
809 | enum bt_ctf_btr_status read_basic_enum_and_call_cb(struct bt_ctf_btr *btr, | |
dfef8367 | 810 | const uint8_t *buf, size_t at) |
e98a2d6e PP |
811 | { |
812 | struct bt_ctf_field_type *int_field_type; | |
813 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
814 | ||
815 | int_field_type = bt_ctf_field_type_enumeration_get_container_type( | |
816 | btr->cur_basic_field_type); | |
dfef8367 | 817 | assert(int_field_type); |
e98a2d6e PP |
818 | status = read_basic_int_and_call(btr, buf, at, |
819 | int_field_type, btr->cur_basic_field_type); | |
dfef8367 | 820 | bt_put(int_field_type); |
e98a2d6e PP |
821 | return status; |
822 | } | |
823 | ||
824 | static inline | |
825 | enum bt_ctf_btr_status read_basic_type_and_call_continue(struct bt_ctf_btr *btr, | |
dfef8367 | 826 | read_basic_and_call_cb_t read_basic_and_call_cb) |
e98a2d6e PP |
827 | { |
828 | size_t available; | |
829 | int64_t field_size; | |
830 | int64_t needed_bits; | |
831 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
832 | ||
833 | if (!at_least_one_bit_left(btr)) { | |
dfef8367 | 834 | BT_LOGV("Reached end of data: btr-addr=%p", btr); |
e98a2d6e PP |
835 | status = BT_CTF_BTR_STATUS_EOF; |
836 | goto end; | |
837 | } | |
838 | ||
839 | field_size = get_basic_field_type_size(btr, btr->cur_basic_field_type); | |
840 | if (field_size < 1) { | |
dfef8367 PP |
841 | BT_LOGW("Cannot get basic field type's size: " |
842 | "btr-addr=%p, ft-addr=%p", | |
843 | btr, btr->cur_basic_field_type); | |
e98a2d6e PP |
844 | status = BT_CTF_BTR_STATUS_ERROR; |
845 | goto end; | |
846 | } | |
847 | ||
848 | available = available_bits(btr); | |
849 | needed_bits = field_size - btr->stitch.at; | |
dfef8367 PP |
850 | BT_LOGV("Continuing basic field decoding: " |
851 | "btr-addr=%p, field-size=%" PRId64 ", needed-size=%" PRId64 ", " | |
852 | "available-size=%zu", | |
853 | btr, field_size, needed_bits, available); | |
e98a2d6e PP |
854 | if (needed_bits <= available) { |
855 | /* We have all the bits; append to stitch, then decode */ | |
856 | stitch_append_from_buf(btr, needed_bits); | |
857 | status = read_basic_and_call_cb(btr, btr->stitch.buf, | |
858 | btr->stitch.offset); | |
859 | if (status != BT_CTF_BTR_STATUS_OK) { | |
dfef8367 PP |
860 | BT_LOGW("Cannot read basic field: " |
861 | "btr-addr=%p, ft-addr=%p, status=%s", | |
862 | btr, btr->cur_basic_field_type, | |
863 | bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
864 | goto end; |
865 | } | |
866 | ||
867 | if (stack_empty(btr->stack)) { | |
868 | /* Root is a basic type */ | |
869 | btr->state = BTR_STATE_DONE; | |
870 | } else { | |
871 | /* Go to next field */ | |
872 | stack_top(btr->stack)->index++; | |
873 | btr->state = BTR_STATE_NEXT_FIELD; | |
874 | btr->last_bo = btr->cur_bo; | |
875 | } | |
876 | goto end; | |
877 | } | |
878 | ||
879 | /* We are here; it means we don't have enough data to decode this */ | |
dfef8367 | 880 | BT_LOGV_STR("Not enough data to read the next basic field: appending to stitch buffer."); |
e98a2d6e PP |
881 | stitch_append_from_remaining_buf(btr); |
882 | status = BT_CTF_BTR_STATUS_EOF; | |
883 | ||
884 | end: | |
885 | return status; | |
886 | } | |
887 | ||
888 | static inline | |
889 | enum bt_ctf_btr_status read_basic_type_and_call_begin(struct bt_ctf_btr *btr, | |
dfef8367 | 890 | read_basic_and_call_cb_t read_basic_and_call_cb) |
e98a2d6e PP |
891 | { |
892 | size_t available; | |
893 | int64_t field_size; | |
894 | enum bt_ctf_byte_order bo; | |
895 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
896 | ||
897 | if (!at_least_one_bit_left(btr)) { | |
dfef8367 | 898 | BT_LOGV("Reached end of data: btr-addr=%p", btr); |
e98a2d6e PP |
899 | status = BT_CTF_BTR_STATUS_EOF; |
900 | goto end; | |
901 | } | |
902 | ||
903 | field_size = get_basic_field_type_size(btr, btr->cur_basic_field_type); | |
e98a2d6e | 904 | if (field_size < 1) { |
dfef8367 PP |
905 | BT_LOGW("Cannot get basic field type's size: " |
906 | "btr-addr=%p, ft-addr=%p", | |
907 | btr, btr->cur_basic_field_type); | |
e98a2d6e PP |
908 | status = BT_CTF_BTR_STATUS_ERROR; |
909 | goto end; | |
910 | } | |
911 | ||
912 | bo = bt_ctf_field_type_get_byte_order(btr->cur_basic_field_type); | |
913 | status = validate_contiguous_bo(btr, bo); | |
e98a2d6e | 914 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 | 915 | /* validate_contiguous_bo() logs errors */ |
e98a2d6e PP |
916 | goto end; |
917 | } | |
918 | ||
919 | available = available_bits(btr); | |
920 | ||
921 | if (field_size <= available) { | |
922 | /* We have all the bits; decode and set now */ | |
923 | status = read_basic_and_call_cb(btr, btr->buf.addr, | |
924 | buf_at_from_addr(btr)); | |
e98a2d6e | 925 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
926 | BT_LOGW("Cannot read basic field: " |
927 | "btr-addr=%p, ft-addr=%p, status=%s", | |
928 | btr, btr->cur_basic_field_type, | |
929 | bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
930 | goto end; |
931 | } | |
932 | ||
933 | consume_bits(btr, field_size); | |
934 | ||
935 | if (stack_empty(btr->stack)) { | |
936 | /* Root is a basic type */ | |
937 | btr->state = BTR_STATE_DONE; | |
938 | } else { | |
939 | /* Go to next field */ | |
940 | stack_top(btr->stack)->index++; | |
941 | btr->state = BTR_STATE_NEXT_FIELD; | |
942 | btr->last_bo = btr->cur_bo; | |
943 | } | |
944 | ||
945 | goto end; | |
946 | } | |
947 | ||
948 | /* We are here; it means we don't have enough data to decode this */ | |
dfef8367 | 949 | BT_LOGV_STR("Not enough data to read the next basic field: setting stitch buffer."); |
e98a2d6e PP |
950 | stitch_set_from_remaining_buf(btr); |
951 | btr->state = BTR_STATE_READ_BASIC_CONTINUE; | |
952 | status = BT_CTF_BTR_STATUS_EOF; | |
953 | ||
954 | end: | |
955 | return status; | |
956 | } | |
957 | ||
958 | static inline | |
959 | enum bt_ctf_btr_status read_basic_int_type_and_call_begin( | |
dfef8367 | 960 | struct bt_ctf_btr *btr) |
e98a2d6e PP |
961 | { |
962 | return read_basic_type_and_call_begin(btr, read_basic_int_and_call_cb); | |
963 | } | |
964 | ||
965 | static inline | |
966 | enum bt_ctf_btr_status read_basic_int_type_and_call_continue( | |
dfef8367 | 967 | struct bt_ctf_btr *btr) |
e98a2d6e PP |
968 | { |
969 | return read_basic_type_and_call_continue(btr, | |
970 | read_basic_int_and_call_cb); | |
971 | } | |
972 | ||
973 | static inline | |
974 | enum bt_ctf_btr_status read_basic_float_type_and_call_begin( | |
dfef8367 | 975 | struct bt_ctf_btr *btr) |
e98a2d6e PP |
976 | { |
977 | return read_basic_type_and_call_begin(btr, | |
978 | read_basic_float_and_call_cb); | |
979 | } | |
980 | ||
981 | static inline | |
982 | enum bt_ctf_btr_status read_basic_float_type_and_call_continue( | |
dfef8367 | 983 | struct bt_ctf_btr *btr) |
e98a2d6e PP |
984 | { |
985 | return read_basic_type_and_call_continue(btr, | |
986 | read_basic_float_and_call_cb); | |
987 | } | |
988 | ||
989 | static inline | |
990 | enum bt_ctf_btr_status read_basic_enum_type_and_call_begin( | |
dfef8367 | 991 | struct bt_ctf_btr *btr) |
e98a2d6e PP |
992 | { |
993 | return read_basic_type_and_call_begin(btr, | |
994 | read_basic_enum_and_call_cb); | |
995 | } | |
996 | ||
997 | static inline | |
998 | enum bt_ctf_btr_status read_basic_enum_type_and_call_continue( | |
dfef8367 | 999 | struct bt_ctf_btr *btr) |
e98a2d6e PP |
1000 | { |
1001 | return read_basic_type_and_call_continue(btr, | |
1002 | read_basic_enum_and_call_cb); | |
1003 | } | |
1004 | ||
1005 | static inline | |
1006 | enum bt_ctf_btr_status read_basic_string_type_and_call( | |
dfef8367 | 1007 | struct bt_ctf_btr *btr, bool begin) |
e98a2d6e PP |
1008 | { |
1009 | size_t buf_at_bytes; | |
1010 | const uint8_t *result; | |
1011 | size_t available_bytes; | |
1012 | const uint8_t *first_chr; | |
1013 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1014 | ||
1015 | if (!at_least_one_bit_left(btr)) { | |
dfef8367 | 1016 | BT_LOGV("Reached end of data: btr-addr=%p", btr); |
e98a2d6e PP |
1017 | status = BT_CTF_BTR_STATUS_EOF; |
1018 | goto end; | |
1019 | } | |
1020 | ||
1021 | assert(buf_at_from_addr(btr) % 8 == 0); | |
1022 | available_bytes = BITS_TO_BYTES_FLOOR(available_bits(btr)); | |
1023 | buf_at_bytes = BITS_TO_BYTES_FLOOR(buf_at_from_addr(btr)); | |
1024 | first_chr = &btr->buf.addr[buf_at_bytes]; | |
1025 | result = memchr(first_chr, '\0', available_bytes); | |
1026 | ||
1027 | if (begin && btr->user.cbs.types.string_begin) { | |
dfef8367 | 1028 | BT_LOGV("Calling user function (string, beginning)."); |
e98a2d6e PP |
1029 | status = btr->user.cbs.types.string_begin( |
1030 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 PP |
1031 | BT_LOGV("User function returned: status=%s", |
1032 | bt_ctf_btr_status_string(status)); | |
e98a2d6e | 1033 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1034 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
1035 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1036 | goto end; |
1037 | } | |
1038 | } | |
1039 | ||
1040 | if (!result) { | |
1041 | /* No null character yet */ | |
1042 | if (btr->user.cbs.types.string) { | |
dfef8367 | 1043 | BT_LOGV("Calling user function (substring)."); |
e98a2d6e PP |
1044 | status = btr->user.cbs.types.string( |
1045 | (const char *) first_chr, | |
1046 | available_bytes, btr->cur_basic_field_type, | |
1047 | btr->user.data); | |
dfef8367 PP |
1048 | BT_LOGV("User function returned: status=%s", |
1049 | bt_ctf_btr_status_string(status)); | |
e98a2d6e | 1050 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1051 | BT_LOGW("User function failed: " |
1052 | "btr-addr=%p, status=%s", | |
1053 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1054 | goto end; |
1055 | } | |
1056 | } | |
1057 | ||
1058 | consume_bits(btr, BYTES_TO_BITS(available_bytes)); | |
1059 | btr->state = BTR_STATE_READ_BASIC_CONTINUE; | |
1060 | status = BT_CTF_BTR_STATUS_EOF; | |
1061 | } else { | |
1062 | /* Found the null character */ | |
1063 | size_t result_len = (size_t) (result - first_chr); | |
1064 | ||
1065 | if (btr->user.cbs.types.string && result_len) { | |
dfef8367 | 1066 | BT_LOGV("Calling user function (substring)."); |
e98a2d6e PP |
1067 | status = btr->user.cbs.types.string( |
1068 | (const char *) first_chr, | |
1069 | result_len, btr->cur_basic_field_type, | |
1070 | btr->user.data); | |
dfef8367 PP |
1071 | BT_LOGV("User function returned: status=%s", |
1072 | bt_ctf_btr_status_string(status)); | |
e98a2d6e | 1073 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1074 | BT_LOGW("User function failed: " |
1075 | "btr-addr=%p, status=%s", | |
1076 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1077 | goto end; |
1078 | } | |
1079 | } | |
1080 | ||
1081 | if (btr->user.cbs.types.string_end) { | |
dfef8367 | 1082 | BT_LOGV("Calling user function (string, end)."); |
e98a2d6e PP |
1083 | status = btr->user.cbs.types.string_end( |
1084 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 PP |
1085 | BT_LOGV("User function returned: status=%s", |
1086 | bt_ctf_btr_status_string(status)); | |
e98a2d6e | 1087 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1088 | BT_LOGW("User function failed: " |
1089 | "btr-addr=%p, status=%s", | |
1090 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1091 | goto end; |
1092 | } | |
1093 | } | |
1094 | ||
1095 | consume_bits(btr, BYTES_TO_BITS(result_len + 1)); | |
1096 | ||
1097 | if (stack_empty(btr->stack)) { | |
1098 | /* Root is a basic type */ | |
1099 | btr->state = BTR_STATE_DONE; | |
1100 | } else { | |
1101 | /* Go to next field */ | |
1102 | stack_top(btr->stack)->index++; | |
1103 | btr->state = BTR_STATE_NEXT_FIELD; | |
1104 | btr->last_bo = btr->cur_bo; | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | end: | |
1109 | return status; | |
1110 | } | |
1111 | ||
1112 | static inline | |
1113 | enum bt_ctf_btr_status read_basic_begin_state(struct bt_ctf_btr *btr) | |
1114 | { | |
1115 | enum bt_ctf_btr_status status; | |
1116 | ||
1117 | assert(btr->cur_basic_field_type); | |
1118 | ||
1119 | switch (bt_ctf_field_type_get_type_id(btr->cur_basic_field_type)) { | |
1487a16a | 1120 | case BT_CTF_FIELD_TYPE_ID_INTEGER: |
e98a2d6e PP |
1121 | status = read_basic_int_type_and_call_begin(btr); |
1122 | break; | |
1487a16a | 1123 | case BT_CTF_FIELD_TYPE_ID_FLOAT: |
e98a2d6e PP |
1124 | status = read_basic_float_type_and_call_begin(btr); |
1125 | break; | |
1487a16a | 1126 | case BT_CTF_FIELD_TYPE_ID_ENUM: |
e98a2d6e PP |
1127 | status = read_basic_enum_type_and_call_begin(btr); |
1128 | break; | |
1487a16a | 1129 | case BT_CTF_FIELD_TYPE_ID_STRING: |
e98a2d6e PP |
1130 | status = read_basic_string_type_and_call(btr, true); |
1131 | break; | |
1132 | default: | |
dfef8367 PP |
1133 | BT_LOGF("Unknown basic field type ID: " |
1134 | "btr-addr=%p, ft-addr=%p, ft-id=%s", | |
1135 | btr, btr->cur_basic_field_type, | |
1136 | bt_ctf_field_type_id_string( | |
1137 | bt_ctf_field_type_get_type_id( | |
1138 | btr->cur_basic_field_type))); | |
0fbb9a9f | 1139 | abort(); |
e98a2d6e PP |
1140 | } |
1141 | ||
1142 | return status; | |
1143 | } | |
1144 | ||
1145 | static inline | |
1146 | enum bt_ctf_btr_status read_basic_continue_state(struct bt_ctf_btr *btr) | |
1147 | { | |
1148 | enum bt_ctf_btr_status status; | |
1149 | ||
1150 | assert(btr->cur_basic_field_type); | |
1151 | ||
1152 | switch (bt_ctf_field_type_get_type_id(btr->cur_basic_field_type)) { | |
1487a16a | 1153 | case BT_CTF_FIELD_TYPE_ID_INTEGER: |
e98a2d6e PP |
1154 | status = read_basic_int_type_and_call_continue(btr); |
1155 | break; | |
1487a16a | 1156 | case BT_CTF_FIELD_TYPE_ID_FLOAT: |
e98a2d6e PP |
1157 | status = read_basic_float_type_and_call_continue(btr); |
1158 | break; | |
1487a16a | 1159 | case BT_CTF_FIELD_TYPE_ID_ENUM: |
e98a2d6e PP |
1160 | status = read_basic_enum_type_and_call_continue(btr); |
1161 | break; | |
1487a16a | 1162 | case BT_CTF_FIELD_TYPE_ID_STRING: |
e98a2d6e PP |
1163 | status = read_basic_string_type_and_call(btr, false); |
1164 | break; | |
1165 | default: | |
dfef8367 PP |
1166 | BT_LOGF("Unknown basic field type ID: " |
1167 | "btr-addr=%p, ft-addr=%p, ft-id=%s", | |
1168 | btr, btr->cur_basic_field_type, | |
1169 | bt_ctf_field_type_id_string( | |
1170 | bt_ctf_field_type_get_type_id( | |
1171 | btr->cur_basic_field_type))); | |
0fbb9a9f | 1172 | abort(); |
e98a2d6e PP |
1173 | } |
1174 | ||
1175 | return status; | |
1176 | } | |
1177 | ||
1178 | static inline | |
1179 | size_t bits_to_skip_to_align_to(struct bt_ctf_btr *btr, size_t align) | |
1180 | { | |
1181 | size_t aligned_packet_at; | |
1182 | ||
1183 | aligned_packet_at = ALIGN(packet_at(btr), align); | |
e98a2d6e PP |
1184 | return aligned_packet_at - packet_at(btr); |
1185 | } | |
1186 | ||
1187 | static inline | |
1188 | enum bt_ctf_btr_status align_type_state(struct bt_ctf_btr *btr, | |
dfef8367 | 1189 | struct bt_ctf_field_type *field_type, enum btr_state next_state) |
e98a2d6e PP |
1190 | { |
1191 | int field_alignment; | |
1192 | size_t skip_bits; | |
1193 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1194 | ||
1195 | /* Get field's alignment */ | |
1196 | field_alignment = bt_ctf_field_type_get_alignment(field_type); | |
1197 | if (field_alignment < 0) { | |
dfef8367 PP |
1198 | BT_LOGW("Cannot get field type's alignment: " |
1199 | "btr-addr=%p, ft-addr=%p, ft-id=%s", | |
1200 | btr, field_type, | |
1201 | bt_ctf_field_type_id_string( | |
1202 | bt_ctf_field_type_get_type_id(field_type))); | |
e98a2d6e PP |
1203 | status = BT_CTF_BTR_STATUS_ERROR; |
1204 | goto end; | |
1205 | } | |
1206 | ||
1207 | /* | |
1208 | * 0 means "undefined" for variants; what we really want is 1 | |
1209 | * (always aligned) | |
1210 | */ | |
1211 | if (field_alignment == 0) { | |
1212 | field_alignment = 1; | |
1213 | } | |
1214 | ||
1215 | /* Compute how many bits we need to skip */ | |
1216 | skip_bits = bits_to_skip_to_align_to(btr, field_alignment); | |
1217 | ||
1218 | /* Nothing to skip? aligned */ | |
1219 | if (skip_bits == 0) { | |
1220 | btr->state = next_state; | |
1221 | goto end; | |
1222 | } | |
1223 | ||
1224 | /* Make sure there's at least one bit left */ | |
1225 | if (!at_least_one_bit_left(btr)) { | |
1226 | status = BT_CTF_BTR_STATUS_EOF; | |
1227 | goto end; | |
1228 | } | |
1229 | ||
1230 | /* Consume as many bits as possible in what's left */ | |
1231 | consume_bits(btr, MIN(available_bits(btr), skip_bits)); | |
1232 | ||
1233 | /* Are we done now? */ | |
1234 | skip_bits = bits_to_skip_to_align_to(btr, field_alignment); | |
e98a2d6e PP |
1235 | if (skip_bits == 0) { |
1236 | /* Yes: go to next state */ | |
1237 | btr->state = next_state; | |
1238 | goto end; | |
1239 | } else { | |
1240 | /* No: need more data */ | |
dfef8367 | 1241 | BT_LOGV("Reached end of data when aligning: btr-addr=%p", btr); |
e98a2d6e PP |
1242 | status = BT_CTF_BTR_STATUS_EOF; |
1243 | } | |
1244 | ||
1245 | end: | |
1246 | return status; | |
1247 | } | |
1248 | ||
1249 | static inline | |
1250 | bool is_compound_type(struct bt_ctf_field_type *field_type) | |
1251 | { | |
1487a16a | 1252 | enum bt_ctf_field_type_id id = bt_ctf_field_type_get_type_id(field_type); |
e98a2d6e | 1253 | |
1487a16a PP |
1254 | return id == BT_CTF_FIELD_TYPE_ID_STRUCT || id == BT_CTF_FIELD_TYPE_ID_ARRAY || |
1255 | id == BT_CTF_FIELD_TYPE_ID_SEQUENCE || id == BT_CTF_FIELD_TYPE_ID_VARIANT; | |
e98a2d6e PP |
1256 | } |
1257 | ||
1258 | static inline | |
1259 | enum bt_ctf_btr_status next_field_state(struct bt_ctf_btr *btr) | |
1260 | { | |
1261 | int ret; | |
1262 | struct stack_entry *top; | |
1263 | struct bt_ctf_field_type *next_field_type = NULL; | |
1264 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1265 | ||
1266 | if (stack_empty(btr->stack)) { | |
1267 | goto end; | |
1268 | } | |
1269 | ||
1270 | top = stack_top(btr->stack); | |
1271 | ||
1272 | /* Are we done with this base type? */ | |
1273 | while (top->index == top->base_len) { | |
1274 | if (btr->user.cbs.types.compound_end) { | |
dfef8367 | 1275 | BT_LOGV("Calling user function (compound, end)."); |
e98a2d6e PP |
1276 | status = btr->user.cbs.types.compound_end( |
1277 | top->base_type, btr->user.data); | |
dfef8367 PP |
1278 | BT_LOGV("User function returned: status=%s", |
1279 | bt_ctf_btr_status_string(status)); | |
e98a2d6e | 1280 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1281 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
1282 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1283 | goto end; |
1284 | } | |
1285 | } | |
1286 | ||
1287 | stack_pop(btr->stack); | |
1288 | ||
1289 | /* Are we done with the root type? */ | |
1290 | if (stack_empty(btr->stack)) { | |
1291 | btr->state = BTR_STATE_DONE; | |
1292 | goto end; | |
1293 | } | |
1294 | ||
1295 | top = stack_top(btr->stack); | |
1296 | top->index++; | |
1297 | } | |
1298 | ||
1299 | /* Get next field's type */ | |
1300 | switch (bt_ctf_field_type_get_type_id(top->base_type)) { | |
1487a16a | 1301 | case BT_CTF_FIELD_TYPE_ID_STRUCT: |
e98a2d6e PP |
1302 | ret = bt_ctf_field_type_structure_get_field( |
1303 | top->base_type, NULL, &next_field_type, | |
1304 | top->index); | |
1305 | if (ret) { | |
1306 | next_field_type = NULL; | |
1307 | } | |
1308 | break; | |
1487a16a | 1309 | case BT_CTF_FIELD_TYPE_ID_ARRAY: |
e98a2d6e PP |
1310 | next_field_type = |
1311 | bt_ctf_field_type_array_get_element_type( | |
1312 | top->base_type); | |
1313 | break; | |
1487a16a | 1314 | case BT_CTF_FIELD_TYPE_ID_SEQUENCE: |
e98a2d6e PP |
1315 | next_field_type = |
1316 | bt_ctf_field_type_sequence_get_element_type( | |
1317 | top->base_type); | |
1318 | break; | |
1487a16a | 1319 | case BT_CTF_FIELD_TYPE_ID_VARIANT: |
e98a2d6e PP |
1320 | /* Variant types are dynamic: query the user, he should know! */ |
1321 | next_field_type = | |
1322 | btr->user.cbs.query.get_variant_type( | |
1323 | top->base_type, btr->user.data); | |
1324 | break; | |
1325 | default: | |
1326 | break; | |
1327 | } | |
1328 | ||
1329 | if (!next_field_type) { | |
dfef8367 PP |
1330 | BT_LOGW("Cannot get the field type of the next field: " |
1331 | "btr-addr=%p, base-ft-addr=%p, base-ft-id=%s, " | |
1332 | "index=%" PRId64, | |
1333 | btr, top->base_type, | |
1334 | bt_ctf_field_type_id_string( | |
1335 | bt_ctf_field_type_get_type_id(top->base_type)), | |
1336 | top->index); | |
e98a2d6e PP |
1337 | status = BT_CTF_BTR_STATUS_ERROR; |
1338 | goto end; | |
1339 | } | |
1340 | ||
1341 | if (is_compound_type(next_field_type)) { | |
1342 | if (btr->user.cbs.types.compound_begin) { | |
dfef8367 | 1343 | BT_LOGV("Calling user function (compound, begin)."); |
e98a2d6e PP |
1344 | status = btr->user.cbs.types.compound_begin( |
1345 | next_field_type, btr->user.data); | |
dfef8367 PP |
1346 | BT_LOGV("User function returned: status=%s", |
1347 | bt_ctf_btr_status_string(status)); | |
e98a2d6e | 1348 | if (status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1349 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
1350 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1351 | goto end; |
1352 | } | |
1353 | } | |
1354 | ||
1355 | ret = stack_push_with_len(btr, next_field_type); | |
1356 | if (ret) { | |
dfef8367 | 1357 | /* stack_push_with_len() logs errors */ |
e98a2d6e PP |
1358 | status = BT_CTF_BTR_STATUS_ERROR; |
1359 | goto end; | |
1360 | } | |
1361 | ||
1362 | /* Next state: align a compound type */ | |
1363 | btr->state = BTR_STATE_ALIGN_COMPOUND; | |
1364 | } else { | |
1365 | /* Replace current basic field type */ | |
dfef8367 PP |
1366 | BT_LOGV("Replacing current basic field type: " |
1367 | "btr-addr=%p, cur-basic-ft-addr=%p, " | |
1368 | "next-basic-ft-addr=%p", | |
1369 | btr, btr->cur_basic_field_type, next_field_type); | |
e98a2d6e PP |
1370 | BT_MOVE(btr->cur_basic_field_type, next_field_type); |
1371 | ||
1372 | /* Next state: align a basic type */ | |
1373 | btr->state = BTR_STATE_ALIGN_BASIC; | |
1374 | } | |
1375 | ||
1376 | end: | |
1377 | BT_PUT(next_field_type); | |
1378 | ||
1379 | return status; | |
1380 | } | |
1381 | ||
1382 | static inline | |
1383 | enum bt_ctf_btr_status handle_state(struct bt_ctf_btr *btr) | |
1384 | { | |
1385 | enum bt_ctf_btr_status status = BT_CTF_BTR_STATUS_OK; | |
1386 | ||
dfef8367 PP |
1387 | BT_LOGV("Handling state: btr-addr=%p, state=%s", |
1388 | btr, btr_state_string(btr->state)); | |
1389 | ||
e98a2d6e PP |
1390 | switch (btr->state) { |
1391 | case BTR_STATE_NEXT_FIELD: | |
1392 | status = next_field_state(btr); | |
1393 | break; | |
1394 | case BTR_STATE_ALIGN_BASIC: | |
1395 | status = align_type_state(btr, btr->cur_basic_field_type, | |
1396 | BTR_STATE_READ_BASIC_BEGIN); | |
1397 | break; | |
1398 | case BTR_STATE_ALIGN_COMPOUND: | |
1399 | status = align_type_state(btr, stack_top(btr->stack)->base_type, | |
1400 | BTR_STATE_NEXT_FIELD); | |
1401 | break; | |
1402 | case BTR_STATE_READ_BASIC_BEGIN: | |
1403 | status = read_basic_begin_state(btr); | |
1404 | break; | |
1405 | case BTR_STATE_READ_BASIC_CONTINUE: | |
1406 | status = read_basic_continue_state(btr); | |
1407 | break; | |
1408 | case BTR_STATE_DONE: | |
1409 | break; | |
1410 | } | |
1411 | ||
dfef8367 PP |
1412 | BT_LOGV("Handled state: btr-addr=%p, status=%s", |
1413 | btr, bt_ctf_btr_status_string(status)); | |
e98a2d6e PP |
1414 | return status; |
1415 | } | |
1416 | ||
1417 | struct bt_ctf_btr *bt_ctf_btr_create(struct bt_ctf_btr_cbs cbs, void *data, | |
1418 | FILE *err_stream) | |
1419 | { | |
1420 | struct bt_ctf_btr *btr; | |
1421 | ||
dfef8367 | 1422 | BT_LOGD_STR("Creating binary type reader (BTR)."); |
e98a2d6e PP |
1423 | btr = g_new0(struct bt_ctf_btr, 1); |
1424 | if (!btr) { | |
dfef8367 | 1425 | BT_LOGE_STR("Failed to allocate one binary type reader."); |
e98a2d6e PP |
1426 | goto end; |
1427 | } | |
1428 | ||
1429 | btr->stack = stack_new(); | |
1430 | if (!btr->stack) { | |
dfef8367 | 1431 | BT_LOGE_STR("Cannot create BTR's stack."); |
e98a2d6e PP |
1432 | bt_ctf_btr_destroy(btr); |
1433 | btr = NULL; | |
1434 | goto end; | |
1435 | } | |
1436 | ||
1437 | btr->state = BTR_STATE_NEXT_FIELD; | |
1438 | btr->user.cbs = cbs; | |
1439 | btr->user.data = data; | |
1440 | btr->err_stream = err_stream; | |
dfef8367 | 1441 | BT_LOGD("Created BTR: addr=%p", btr); |
e98a2d6e PP |
1442 | |
1443 | end: | |
1444 | return btr; | |
1445 | } | |
1446 | ||
1447 | void bt_ctf_btr_destroy(struct bt_ctf_btr *btr) | |
1448 | { | |
1449 | if (btr->stack) { | |
1450 | stack_destroy(btr->stack); | |
1451 | } | |
1452 | ||
dfef8367 | 1453 | BT_LOGD("Destroying BTR: addr=%p", btr); |
e98a2d6e PP |
1454 | BT_PUT(btr->cur_basic_field_type); |
1455 | g_free(btr); | |
1456 | } | |
1457 | ||
1458 | static | |
1459 | void reset(struct bt_ctf_btr *btr) | |
1460 | { | |
dfef8367 | 1461 | BT_LOGD("Resetting BTR: addr=%p", btr); |
e98a2d6e PP |
1462 | stack_clear(btr->stack); |
1463 | BT_PUT(btr->cur_basic_field_type); | |
1464 | stitch_reset(btr); | |
1465 | btr->buf.addr = NULL; | |
1466 | btr->last_bo = BT_CTF_BYTE_ORDER_UNKNOWN; | |
1467 | } | |
1468 | ||
dfef8367 PP |
1469 | static |
1470 | void update_packet_offset(struct bt_ctf_btr *btr) | |
1471 | { | |
1472 | BT_LOGV("Updating packet offset for next call: " | |
1473 | "btr-addr=%p, cur-packet-offset=%zu, next-packet-offset=%zu", | |
1474 | btr, btr->buf.packet_offset, | |
1475 | btr->buf.packet_offset + btr->buf.at); | |
1476 | btr->buf.packet_offset += btr->buf.at; | |
1477 | } | |
1478 | ||
e98a2d6e PP |
1479 | size_t bt_ctf_btr_start(struct bt_ctf_btr *btr, |
1480 | struct bt_ctf_field_type *type, const uint8_t *buf, | |
1481 | size_t offset, size_t packet_offset, size_t sz, | |
1482 | enum bt_ctf_btr_status *status) | |
1483 | { | |
1484 | assert(btr); | |
1485 | assert(buf); | |
1486 | assert(sz > 0); | |
1487 | assert(BYTES_TO_BITS(sz) > offset); | |
1488 | reset(btr); | |
1489 | btr->buf.addr = buf; | |
1490 | btr->buf.offset = offset; | |
1491 | btr->buf.at = 0; | |
1492 | btr->buf.packet_offset = packet_offset; | |
1493 | btr->buf.buf_sz = sz; | |
1494 | btr->buf.sz = BYTES_TO_BITS(sz) - offset; | |
1495 | *status = BT_CTF_BTR_STATUS_OK; | |
1496 | ||
dfef8367 PP |
1497 | BT_LOGV("Starting decoding: btr-addr=%p, ft-addr=%p, " |
1498 | "buf-addr=%p, buf-size=%zu, offset=%zu, " | |
1499 | "packet-offset=%zu", | |
1500 | btr, type, buf, sz, offset, packet_offset); | |
1501 | ||
e98a2d6e PP |
1502 | /* Set root type */ |
1503 | if (is_compound_type(type)) { | |
1504 | /* Compound type: push on visit stack */ | |
1505 | int stack_ret; | |
1506 | ||
1507 | if (btr->user.cbs.types.compound_begin) { | |
dfef8367 | 1508 | BT_LOGV("Calling user function (compound, begin)."); |
e98a2d6e PP |
1509 | *status = btr->user.cbs.types.compound_begin( |
1510 | type, btr->user.data); | |
dfef8367 PP |
1511 | BT_LOGV("User function returned: status=%s", |
1512 | bt_ctf_btr_status_string(*status)); | |
e98a2d6e | 1513 | if (*status != BT_CTF_BTR_STATUS_OK) { |
dfef8367 PP |
1514 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
1515 | btr, bt_ctf_btr_status_string(*status)); | |
e98a2d6e PP |
1516 | goto end; |
1517 | } | |
1518 | } | |
1519 | ||
1520 | stack_ret = stack_push_with_len(btr, type); | |
1521 | if (stack_ret) { | |
dfef8367 | 1522 | /* stack_push_with_len() logs errors */ |
e98a2d6e PP |
1523 | *status = BT_CTF_BTR_STATUS_ERROR; |
1524 | goto end; | |
1525 | } | |
1526 | ||
1527 | btr->state = BTR_STATE_ALIGN_COMPOUND; | |
1528 | } else { | |
1529 | /* Basic type: set as current basic type */ | |
1530 | btr->cur_basic_field_type = type; | |
1531 | bt_get(btr->cur_basic_field_type); | |
1532 | btr->state = BTR_STATE_ALIGN_BASIC; | |
1533 | } | |
1534 | ||
1535 | /* Run the machine! */ | |
dfef8367 PP |
1536 | BT_LOGV_STR("Running the state machine."); |
1537 | ||
e98a2d6e PP |
1538 | while (true) { |
1539 | *status = handle_state(btr); | |
1540 | if (*status != BT_CTF_BTR_STATUS_OK) { | |
1541 | break; | |
1542 | } else if (btr->state == BTR_STATE_DONE) { | |
1543 | break; | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | /* Update packet offset for next time */ | |
dfef8367 | 1548 | update_packet_offset(btr); |
e98a2d6e PP |
1549 | |
1550 | end: | |
1551 | return btr->buf.at; | |
1552 | } | |
1553 | ||
1554 | size_t bt_ctf_btr_continue(struct bt_ctf_btr *btr, | |
1555 | const uint8_t *buf, size_t sz, | |
1556 | enum bt_ctf_btr_status *status) | |
1557 | { | |
1558 | assert(btr); | |
1559 | assert(buf); | |
1560 | assert(sz > 0); | |
1561 | btr->buf.addr = buf; | |
1562 | btr->buf.offset = 0; | |
1563 | btr->buf.at = 0; | |
1564 | btr->buf.buf_sz = sz; | |
1565 | btr->buf.sz = BYTES_TO_BITS(sz); | |
1566 | *status = BT_CTF_BTR_STATUS_OK; | |
1567 | ||
dfef8367 PP |
1568 | BT_LOGV("Continuing decoding: btr-addr=%p, buf-addr=%p, buf-size=%zu", |
1569 | btr, buf, sz); | |
1570 | ||
e98a2d6e | 1571 | /* Continue running the machine */ |
dfef8367 PP |
1572 | BT_LOGV_STR("Running the state machine."); |
1573 | ||
e98a2d6e PP |
1574 | while (true) { |
1575 | *status = handle_state(btr); | |
1576 | if (*status != BT_CTF_BTR_STATUS_OK) { | |
1577 | break; | |
1578 | } else if (btr->state == BTR_STATE_DONE) { | |
1579 | break; | |
1580 | } | |
1581 | } | |
1582 | ||
1583 | /* Update packet offset for next time */ | |
dfef8367 | 1584 | update_packet_offset(btr); |
e98a2d6e PP |
1585 | return btr->buf.at; |
1586 | } |