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> | |
f6ccaed9 | 35 | #include <babeltrace/assert-internal.h> |
e98a2d6e | 36 | #include <string.h> |
3d9990ac | 37 | #include <babeltrace/bitfield-internal.h> |
3dca2276 | 38 | #include <babeltrace/common-internal.h> |
9d408fca | 39 | #include <babeltrace/babeltrace.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 | |
e98a2d6e PP |
46 | #define DIV8(_x) ((_x) >> 3) |
47 | #define BYTES_TO_BITS(_x) ((_x) * 8) | |
48 | #define BITS_TO_BYTES_FLOOR(_x) DIV8(_x) | |
49 | #define BITS_TO_BYTES_CEIL(_x) DIV8((_x) + 7) | |
50 | #define IN_BYTE_OFFSET(_at) ((_at) & 7) | |
51 | ||
52 | /* A visit stack entry */ | |
53 | struct stack_entry { | |
54 | /* | |
55 | * Current type of base field, one of: | |
56 | * | |
57 | * * Structure | |
58 | * * Array | |
59 | * * Sequence | |
60 | * * Variant | |
e98a2d6e | 61 | */ |
50842bdc | 62 | struct bt_field_type *base_type; |
e98a2d6e PP |
63 | |
64 | /* Length of base field (always 1 for variant types) */ | |
65 | int64_t base_len; | |
66 | ||
67 | /* Lndex of next field to read */ | |
68 | int64_t index; | |
69 | }; | |
70 | ||
71 | /* Visit stack */ | |
72 | struct stack { | |
4077d987 PP |
73 | /* Entries (struct stack_entry) */ |
74 | GArray *entries; | |
75 | ||
76 | /* Number of active entries */ | |
77 | size_t size; | |
e98a2d6e PP |
78 | }; |
79 | ||
80 | /* Reading states */ | |
81 | enum btr_state { | |
82 | BTR_STATE_NEXT_FIELD, | |
83 | BTR_STATE_ALIGN_BASIC, | |
84 | BTR_STATE_ALIGN_COMPOUND, | |
85 | BTR_STATE_READ_BASIC_BEGIN, | |
86 | BTR_STATE_READ_BASIC_CONTINUE, | |
87 | BTR_STATE_DONE, | |
88 | }; | |
89 | ||
90 | /* Binary type reader */ | |
50842bdc | 91 | struct bt_btr { |
e98a2d6e PP |
92 | /* Bisit stack */ |
93 | struct stack *stack; | |
94 | ||
e98a2d6e | 95 | /* Current basic field type */ |
50842bdc | 96 | struct bt_field_type *cur_basic_field_type; |
e98a2d6e PP |
97 | |
98 | /* Current state */ | |
99 | enum btr_state state; | |
100 | ||
101 | /* | |
102 | * Last basic field type's byte order. | |
103 | * | |
104 | * This is used to detect errors since two contiguous basic | |
105 | * types for which the common boundary is not the boundary of | |
106 | * a byte cannot have different byte orders. | |
107 | * | |
50842bdc | 108 | * This is set to BT_BYTE_ORDER_UNKNOWN on reset and when |
e98a2d6e PP |
109 | * the last basic field type was a string type. |
110 | */ | |
50842bdc | 111 | enum bt_byte_order last_bo; |
e98a2d6e PP |
112 | |
113 | /* Current byte order (copied to last_bo after a successful read) */ | |
50842bdc | 114 | enum bt_byte_order cur_bo; |
e98a2d6e PP |
115 | |
116 | /* Stitch buffer infos */ | |
117 | struct { | |
118 | /* Stitch buffer */ | |
119 | uint8_t buf[16]; | |
120 | ||
121 | /* Offset, within stitch buffer, of first bit */ | |
122 | size_t offset; | |
123 | ||
124 | /* Length (bits) of data in stitch buffer from offset */ | |
125 | size_t at; | |
126 | } stitch; | |
127 | ||
128 | /* User buffer infos */ | |
129 | struct { | |
130 | /* Address */ | |
131 | const uint8_t *addr; | |
132 | ||
133 | /* Offset of data from address (bits) */ | |
134 | size_t offset; | |
135 | ||
136 | /* Current position from offset (bits) */ | |
137 | size_t at; | |
138 | ||
139 | /* Offset of offset within whole packet (bits) */ | |
140 | size_t packet_offset; | |
141 | ||
142 | /* Data size in buffer (bits) */ | |
143 | size_t sz; | |
144 | ||
145 | /* Buffer size (bytes) */ | |
146 | size_t buf_sz; | |
147 | } buf; | |
148 | ||
149 | /* User stuff */ | |
150 | struct { | |
151 | /* Callback functions */ | |
50842bdc | 152 | struct bt_btr_cbs cbs; |
e98a2d6e PP |
153 | |
154 | /* Private data */ | |
155 | void *data; | |
156 | } user; | |
157 | }; | |
158 | ||
dfef8367 PP |
159 | static inline |
160 | const char *btr_state_string(enum btr_state state) | |
161 | { | |
162 | switch (state) { | |
163 | case BTR_STATE_NEXT_FIELD: | |
164 | return "BTR_STATE_NEXT_FIELD"; | |
165 | case BTR_STATE_ALIGN_BASIC: | |
166 | return "BTR_STATE_ALIGN_BASIC"; | |
167 | case BTR_STATE_ALIGN_COMPOUND: | |
168 | return "BTR_STATE_ALIGN_COMPOUND"; | |
169 | case BTR_STATE_READ_BASIC_BEGIN: | |
170 | return "BTR_STATE_READ_BASIC_BEGIN"; | |
171 | case BTR_STATE_READ_BASIC_CONTINUE: | |
172 | return "BTR_STATE_READ_BASIC_CONTINUE"; | |
173 | case BTR_STATE_DONE: | |
174 | return "BTR_STATE_DONE"; | |
175 | default: | |
176 | return "(unknown)"; | |
177 | } | |
178 | } | |
179 | ||
e98a2d6e PP |
180 | static |
181 | struct stack *stack_new(void) | |
182 | { | |
183 | struct stack *stack = NULL; | |
184 | ||
185 | stack = g_new0(struct stack, 1); | |
186 | if (!stack) { | |
dfef8367 | 187 | BT_LOGE_STR("Failed to allocate one stack."); |
e98a2d6e PP |
188 | goto error; |
189 | } | |
190 | ||
4077d987 | 191 | stack->entries = g_array_new(FALSE, TRUE, sizeof(struct stack_entry)); |
e98a2d6e | 192 | if (!stack->entries) { |
4077d987 | 193 | BT_LOGE_STR("Failed to allocate a GArray."); |
e98a2d6e PP |
194 | goto error; |
195 | } | |
196 | ||
dfef8367 | 197 | BT_LOGD("Created stack: addr=%p", stack); |
e98a2d6e PP |
198 | return stack; |
199 | ||
200 | error: | |
201 | g_free(stack); | |
e98a2d6e PP |
202 | return NULL; |
203 | } | |
204 | ||
205 | static | |
206 | void stack_destroy(struct stack *stack) | |
207 | { | |
208 | if (!stack) { | |
209 | return; | |
210 | } | |
211 | ||
dfef8367 | 212 | BT_LOGD("Destroying stack: addr=%p", stack); |
4077d987 PP |
213 | |
214 | if (stack->entries) { | |
215 | g_array_free(stack->entries, TRUE); | |
216 | } | |
217 | ||
e98a2d6e PP |
218 | g_free(stack); |
219 | } | |
220 | ||
221 | static inline | |
50842bdc PP |
222 | int64_t get_compound_field_type_length(struct bt_btr *btr, |
223 | struct bt_field_type *field_type) | |
e98a2d6e PP |
224 | { |
225 | int64_t length; | |
226 | ||
50842bdc PP |
227 | switch (bt_field_type_get_type_id(field_type)) { |
228 | case BT_FIELD_TYPE_ID_STRUCT: | |
229 | length = (int64_t) bt_field_type_structure_get_field_count( | |
e98a2d6e PP |
230 | field_type); |
231 | break; | |
50842bdc | 232 | case BT_FIELD_TYPE_ID_VARIANT: |
e98a2d6e PP |
233 | /* Variant field types always "contain" a single type */ |
234 | length = 1; | |
235 | break; | |
50842bdc PP |
236 | case BT_FIELD_TYPE_ID_ARRAY: |
237 | length = bt_field_type_array_get_length(field_type); | |
e98a2d6e | 238 | break; |
50842bdc | 239 | case BT_FIELD_TYPE_ID_SEQUENCE: |
e98a2d6e PP |
240 | length = btr->user.cbs.query.get_sequence_length(field_type, |
241 | btr->user.data); | |
242 | break; | |
243 | default: | |
dfef8367 PP |
244 | BT_LOGW("Cannot get field type's field count: btr-addr=%p, " |
245 | "ft-addr=%p, ft-id=%s", | |
246 | btr, field_type, | |
3dca2276 | 247 | bt_common_field_type_id_string( |
50842bdc PP |
248 | bt_field_type_get_type_id(field_type))); |
249 | length = BT_BTR_STATUS_ERROR; | |
e98a2d6e PP |
250 | } |
251 | ||
252 | return length; | |
253 | } | |
254 | ||
255 | static | |
50842bdc | 256 | int stack_push(struct stack *stack, struct bt_field_type *base_type, |
e98a2d6e PP |
257 | size_t base_len) |
258 | { | |
e98a2d6e PP |
259 | struct stack_entry *entry; |
260 | ||
f6ccaed9 PP |
261 | BT_ASSERT(stack); |
262 | BT_ASSERT(base_type); | |
dfef8367 PP |
263 | BT_LOGV("Pushing field type on stack: stack-addr=%p, " |
264 | "ft-addr=%p, ft-id=%s, base-length=%zu, " | |
4077d987 | 265 | "stack-size-before=%zu, stack-size-after=%zu", |
3dca2276 | 266 | stack, base_type, bt_common_field_type_id_string( |
50842bdc | 267 | bt_field_type_get_type_id(base_type)), |
4077d987 PP |
268 | base_len, stack->size, stack->size + 1); |
269 | ||
270 | if (stack->entries->len == stack->size) { | |
271 | g_array_set_size(stack->entries, stack->size + 1); | |
e98a2d6e PP |
272 | } |
273 | ||
4077d987 | 274 | entry = &g_array_index(stack->entries, struct stack_entry, stack->size); |
e98a2d6e | 275 | entry->base_type = base_type; |
e98a2d6e | 276 | entry->base_len = base_len; |
4077d987 PP |
277 | entry->index = 0; |
278 | stack->size++; | |
279 | return 0; | |
e98a2d6e PP |
280 | } |
281 | ||
282 | static | |
50842bdc PP |
283 | int stack_push_with_len(struct bt_btr *btr, |
284 | struct bt_field_type *base_type) | |
e98a2d6e PP |
285 | { |
286 | int ret = 0; | |
287 | int64_t base_len = get_compound_field_type_length(btr, base_type); | |
288 | ||
289 | if (base_len < 0) { | |
dfef8367 PP |
290 | BT_LOGW("Cannot get compound field type's field count: " |
291 | "btr-addr=%p, ft-addr=%p, ft-id=%s", | |
3dca2276 | 292 | btr, base_type, bt_common_field_type_id_string( |
50842bdc PP |
293 | bt_field_type_get_type_id(base_type))); |
294 | ret = BT_BTR_STATUS_ERROR; | |
e98a2d6e PP |
295 | goto end; |
296 | } | |
297 | ||
298 | ret = stack_push(btr->stack, base_type, (size_t) base_len); | |
299 | ||
300 | end: | |
301 | return ret; | |
302 | } | |
303 | ||
304 | static inline | |
305 | unsigned int stack_size(struct stack *stack) | |
306 | { | |
f6ccaed9 | 307 | BT_ASSERT(stack); |
4077d987 | 308 | return stack->size; |
e98a2d6e PP |
309 | } |
310 | ||
311 | static | |
312 | void stack_pop(struct stack *stack) | |
313 | { | |
f6ccaed9 PP |
314 | BT_ASSERT(stack); |
315 | BT_ASSERT(stack_size(stack)); | |
dfef8367 PP |
316 | BT_LOGV("Popping from stack: " |
317 | "stack-addr=%p, stack-size-before=%u, stack-size-after=%u", | |
318 | stack, stack->entries->len, stack->entries->len - 1); | |
4077d987 | 319 | stack->size--; |
e98a2d6e PP |
320 | } |
321 | ||
322 | static inline | |
323 | bool stack_empty(struct stack *stack) | |
324 | { | |
325 | return stack_size(stack) == 0; | |
326 | } | |
327 | ||
328 | static | |
329 | void stack_clear(struct stack *stack) | |
330 | { | |
f6ccaed9 | 331 | BT_ASSERT(stack); |
4077d987 | 332 | stack->size = 0; |
e98a2d6e PP |
333 | } |
334 | ||
335 | static inline | |
336 | struct stack_entry *stack_top(struct stack *stack) | |
337 | { | |
f6ccaed9 PP |
338 | BT_ASSERT(stack); |
339 | BT_ASSERT(stack_size(stack)); | |
4077d987 PP |
340 | return &g_array_index(stack->entries, struct stack_entry, |
341 | stack->size - 1); | |
e98a2d6e PP |
342 | } |
343 | ||
344 | static inline | |
50842bdc | 345 | size_t available_bits(struct bt_btr *btr) |
e98a2d6e PP |
346 | { |
347 | return btr->buf.sz - btr->buf.at; | |
348 | } | |
349 | ||
350 | static inline | |
50842bdc | 351 | void consume_bits(struct bt_btr *btr, size_t incr) |
e98a2d6e | 352 | { |
dfef8367 PP |
353 | BT_LOGV("Advancing cursor: btr-addr=%p, cur-before=%zu, cur-after=%zu", |
354 | btr, btr->buf.at, btr->buf.at + incr); | |
e98a2d6e PP |
355 | btr->buf.at += incr; |
356 | } | |
357 | ||
358 | static inline | |
50842bdc | 359 | bool has_enough_bits(struct bt_btr *btr, size_t sz) |
e98a2d6e PP |
360 | { |
361 | return available_bits(btr) >= sz; | |
362 | } | |
363 | ||
364 | static inline | |
50842bdc | 365 | bool at_least_one_bit_left(struct bt_btr *btr) |
e98a2d6e PP |
366 | { |
367 | return has_enough_bits(btr, 1); | |
368 | } | |
369 | ||
370 | static inline | |
50842bdc | 371 | size_t packet_at(struct bt_btr *btr) |
e98a2d6e PP |
372 | { |
373 | return btr->buf.packet_offset + btr->buf.at; | |
374 | } | |
375 | ||
376 | static inline | |
50842bdc | 377 | size_t buf_at_from_addr(struct bt_btr *btr) |
e98a2d6e PP |
378 | { |
379 | /* | |
380 | * Considering this: | |
381 | * | |
382 | * ====== offset ===== (17) | |
383 | * | |
384 | * xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx | |
385 | * ^ | |
386 | * addr (0) ==== at ==== (12) | |
387 | * | |
388 | * We want this: | |
389 | * | |
390 | * =============================== (29) | |
391 | */ | |
392 | return btr->buf.offset + btr->buf.at; | |
393 | } | |
394 | ||
395 | static inline | |
50842bdc PP |
396 | int get_basic_field_type_size(struct bt_btr *btr, |
397 | struct bt_field_type *field_type) | |
e98a2d6e PP |
398 | { |
399 | int size; | |
400 | ||
50842bdc PP |
401 | switch (bt_field_type_get_type_id(field_type)) { |
402 | case BT_FIELD_TYPE_ID_INTEGER: | |
403 | size = bt_field_type_integer_get_size(field_type); | |
e98a2d6e | 404 | break; |
50842bdc | 405 | case BT_FIELD_TYPE_ID_FLOAT: |
e98a2d6e PP |
406 | { |
407 | int exp_dig, mant_dig; | |
408 | ||
409 | exp_dig = | |
50842bdc | 410 | bt_field_type_floating_point_get_exponent_digits( |
e98a2d6e PP |
411 | field_type); |
412 | mant_dig = | |
50842bdc | 413 | bt_field_type_floating_point_get_mantissa_digits( |
e98a2d6e | 414 | field_type); |
f6ccaed9 PP |
415 | BT_ASSERT(exp_dig >= 0); |
416 | BT_ASSERT(mant_dig >= 0); | |
e98a2d6e PP |
417 | size = exp_dig + mant_dig; |
418 | break; | |
419 | } | |
50842bdc | 420 | case BT_FIELD_TYPE_ID_ENUM: |
e98a2d6e | 421 | { |
50842bdc | 422 | struct bt_field_type *int_type; |
e98a2d6e | 423 | |
5ae32b51 PP |
424 | int_type = |
425 | bt_field_type_enumeration_borrow_container_field_type( | |
426 | field_type); | |
f6ccaed9 | 427 | BT_ASSERT(int_type); |
e98a2d6e | 428 | size = get_basic_field_type_size(btr, int_type); |
e98a2d6e PP |
429 | break; |
430 | } | |
431 | default: | |
50842bdc | 432 | size = BT_BTR_STATUS_ERROR; |
e98a2d6e PP |
433 | break; |
434 | } | |
435 | ||
e98a2d6e PP |
436 | return size; |
437 | } | |
438 | ||
439 | static | |
50842bdc | 440 | void stitch_reset(struct bt_btr *btr) |
e98a2d6e PP |
441 | { |
442 | btr->stitch.offset = 0; | |
443 | btr->stitch.at = 0; | |
444 | } | |
445 | ||
446 | static inline | |
50842bdc | 447 | size_t stitch_at_from_addr(struct bt_btr *btr) |
e98a2d6e PP |
448 | { |
449 | return btr->stitch.offset + btr->stitch.at; | |
450 | } | |
451 | ||
452 | static | |
50842bdc | 453 | void stitch_append_from_buf(struct bt_btr *btr, size_t sz) |
e98a2d6e PP |
454 | { |
455 | size_t stitch_byte_at; | |
456 | size_t buf_byte_at; | |
5ae32b51 | 457 | size_t nb_bytes; |
e98a2d6e PP |
458 | |
459 | if (sz == 0) { | |
460 | return; | |
461 | } | |
462 | ||
463 | stitch_byte_at = | |
464 | BITS_TO_BYTES_FLOOR(stitch_at_from_addr(btr)); | |
465 | buf_byte_at = BITS_TO_BYTES_FLOOR(buf_at_from_addr(btr)); | |
466 | nb_bytes = BITS_TO_BYTES_CEIL(sz); | |
f6ccaed9 PP |
467 | BT_ASSERT(nb_bytes > 0); |
468 | BT_ASSERT(btr->buf.addr); | |
e98a2d6e PP |
469 | memcpy(&btr->stitch.buf[stitch_byte_at], &btr->buf.addr[buf_byte_at], |
470 | nb_bytes); | |
471 | btr->stitch.at += sz; | |
472 | consume_bits(btr, sz); | |
473 | } | |
474 | ||
475 | static | |
50842bdc | 476 | void stitch_append_from_remaining_buf(struct bt_btr *btr) |
e98a2d6e PP |
477 | { |
478 | stitch_append_from_buf(btr, available_bits(btr)); | |
479 | } | |
480 | ||
481 | static | |
50842bdc | 482 | void stitch_set_from_remaining_buf(struct bt_btr *btr) |
e98a2d6e PP |
483 | { |
484 | stitch_reset(btr); | |
485 | btr->stitch.offset = IN_BYTE_OFFSET(buf_at_from_addr(btr)); | |
486 | stitch_append_from_remaining_buf(btr); | |
487 | } | |
488 | ||
489 | static inline | |
50842bdc PP |
490 | enum bt_btr_status read_unsigned_bitfield(const uint8_t *buf, size_t at, |
491 | int64_t field_size, enum bt_byte_order bo, uint64_t *v) | |
e98a2d6e | 492 | { |
50842bdc | 493 | enum bt_btr_status status = BT_BTR_STATUS_OK; |
e98a2d6e PP |
494 | |
495 | switch (bo) { | |
50842bdc PP |
496 | case BT_BYTE_ORDER_BIG_ENDIAN: |
497 | case BT_BYTE_ORDER_NETWORK: | |
e98a2d6e PP |
498 | bt_bitfield_read_be(buf, uint8_t, at, field_size, v); |
499 | break; | |
50842bdc | 500 | case BT_BYTE_ORDER_LITTLE_ENDIAN: |
e98a2d6e PP |
501 | bt_bitfield_read_le(buf, uint8_t, at, field_size, v); |
502 | break; | |
503 | default: | |
dfef8367 PP |
504 | BT_LOGF("Cannot read unsigned bit array: unknown byte order: bo=%d", bo); |
505 | abort(); | |
e98a2d6e PP |
506 | } |
507 | ||
dfef8367 PP |
508 | BT_LOGV("Read unsigned bit array: cur=%zu, size=%" PRId64 ", " |
509 | "bo=%s, val=%" PRIu64, at, field_size, | |
3dca2276 | 510 | bt_common_byte_order_string(bo), *v); |
e98a2d6e PP |
511 | return status; |
512 | } | |
513 | ||
514 | static inline | |
50842bdc PP |
515 | enum bt_btr_status read_signed_bitfield(const uint8_t *buf, size_t at, |
516 | int64_t field_size, enum bt_byte_order bo, int64_t *v) | |
e98a2d6e | 517 | { |
50842bdc | 518 | enum bt_btr_status status = BT_BTR_STATUS_OK; |
e98a2d6e PP |
519 | |
520 | switch (bo) { | |
50842bdc PP |
521 | case BT_BYTE_ORDER_BIG_ENDIAN: |
522 | case BT_BYTE_ORDER_NETWORK: | |
e98a2d6e PP |
523 | bt_bitfield_read_be(buf, uint8_t, at, field_size, v); |
524 | break; | |
50842bdc | 525 | case BT_BYTE_ORDER_LITTLE_ENDIAN: |
e98a2d6e PP |
526 | bt_bitfield_read_le(buf, uint8_t, at, field_size, v); |
527 | break; | |
528 | default: | |
dfef8367 PP |
529 | BT_LOGF("Cannot read signed bit array: unknown byte order: bo=%d", bo); |
530 | abort(); | |
e98a2d6e PP |
531 | } |
532 | ||
dfef8367 PP |
533 | BT_LOGV("Read signed bit array: cur=%zu, size=%" PRId64 ", " |
534 | "bo=%s, val=%" PRId64, at, field_size, | |
3dca2276 | 535 | bt_common_byte_order_string(bo), *v); |
e98a2d6e PP |
536 | return status; |
537 | } | |
538 | ||
50842bdc | 539 | typedef enum bt_btr_status (* read_basic_and_call_cb_t)(struct bt_btr *, |
dfef8367 | 540 | const uint8_t *, size_t); |
e98a2d6e PP |
541 | |
542 | static inline | |
50842bdc PP |
543 | enum bt_btr_status validate_contiguous_bo(struct bt_btr *btr, |
544 | enum bt_byte_order next_bo) | |
e98a2d6e | 545 | { |
50842bdc | 546 | enum bt_btr_status status = BT_BTR_STATUS_OK; |
e98a2d6e PP |
547 | |
548 | /* Always valid when at a byte boundary */ | |
549 | if (packet_at(btr) % 8 == 0) { | |
550 | goto end; | |
551 | } | |
552 | ||
553 | /* Always valid if last byte order is unknown */ | |
50842bdc | 554 | if (btr->last_bo == BT_BYTE_ORDER_UNKNOWN) { |
e98a2d6e PP |
555 | goto end; |
556 | } | |
557 | ||
558 | /* Always valid if next byte order is unknown */ | |
50842bdc | 559 | if (next_bo == BT_BYTE_ORDER_UNKNOWN) { |
e98a2d6e PP |
560 | goto end; |
561 | } | |
562 | ||
563 | /* Make sure last byte order is compatible with the next byte order */ | |
564 | switch (btr->last_bo) { | |
50842bdc PP |
565 | case BT_BYTE_ORDER_BIG_ENDIAN: |
566 | case BT_BYTE_ORDER_NETWORK: | |
567 | if (next_bo != BT_BYTE_ORDER_BIG_ENDIAN && | |
568 | next_bo != BT_BYTE_ORDER_NETWORK) { | |
569 | status = BT_BTR_STATUS_ERROR; | |
e98a2d6e PP |
570 | } |
571 | break; | |
50842bdc PP |
572 | case BT_BYTE_ORDER_LITTLE_ENDIAN: |
573 | if (next_bo != BT_BYTE_ORDER_LITTLE_ENDIAN) { | |
574 | status = BT_BTR_STATUS_ERROR; | |
e98a2d6e PP |
575 | } |
576 | break; | |
577 | default: | |
50842bdc | 578 | status = BT_BTR_STATUS_ERROR; |
e98a2d6e PP |
579 | } |
580 | ||
581 | end: | |
fdf0e7a0 | 582 | if (status < 0) { |
dfef8367 PP |
583 | BT_LOGW("Cannot read bit array: two different byte orders not at a byte boundary: " |
584 | "btr-addr=%p, last-bo=%s, next-bo=%s", | |
3dca2276 PP |
585 | btr, bt_common_byte_order_string(btr->last_bo), |
586 | bt_common_byte_order_string(next_bo)); | |
dfef8367 PP |
587 | } |
588 | ||
e98a2d6e PP |
589 | return status; |
590 | } | |
591 | ||
592 | static | |
50842bdc | 593 | enum bt_btr_status read_basic_float_and_call_cb(struct bt_btr *btr, |
dfef8367 | 594 | const uint8_t *buf, size_t at) |
e98a2d6e PP |
595 | { |
596 | int ret; | |
597 | double dblval; | |
598 | int64_t field_size; | |
50842bdc PP |
599 | enum bt_byte_order bo; |
600 | enum bt_btr_status status = BT_BTR_STATUS_OK; | |
e98a2d6e PP |
601 | |
602 | field_size = get_basic_field_type_size(btr, btr->cur_basic_field_type); | |
50842bdc | 603 | bo = bt_field_type_get_byte_order(btr->cur_basic_field_type); |
e98a2d6e PP |
604 | btr->cur_bo = bo; |
605 | ||
606 | switch (field_size) { | |
607 | case 32: | |
608 | { | |
609 | uint64_t v; | |
610 | union { | |
611 | uint32_t u; | |
612 | float f; | |
613 | } f32; | |
614 | ||
50842bdc | 615 | ret = bt_field_type_floating_point_get_mantissa_digits( |
e98a2d6e | 616 | btr->cur_basic_field_type); |
f6ccaed9 | 617 | BT_ASSERT(ret == 24); |
50842bdc | 618 | ret = bt_field_type_floating_point_get_exponent_digits( |
e98a2d6e | 619 | btr->cur_basic_field_type); |
f6ccaed9 | 620 | BT_ASSERT(ret == 8); |
e98a2d6e | 621 | status = read_unsigned_bitfield(buf, at, field_size, bo, &v); |
50842bdc | 622 | if (status != BT_BTR_STATUS_OK) { |
dfef8367 PP |
623 | BT_LOGW("Cannot read unsigned 32-bit bit array for floating point number field: " |
624 | "btr-addr=%p, status=%s", | |
50842bdc | 625 | btr, bt_btr_status_string(status)); |
e98a2d6e PP |
626 | goto end; |
627 | } | |
628 | ||
629 | f32.u = (uint32_t) v; | |
630 | dblval = (double) f32.f; | |
631 | break; | |
632 | } | |
633 | case 64: | |
634 | { | |
635 | union { | |
636 | uint64_t u; | |
637 | double d; | |
638 | } f64; | |
639 | ||
50842bdc | 640 | ret = bt_field_type_floating_point_get_mantissa_digits( |
e98a2d6e | 641 | btr->cur_basic_field_type); |
f6ccaed9 | 642 | BT_ASSERT(ret == 53); |
50842bdc | 643 | ret = bt_field_type_floating_point_get_exponent_digits( |
e98a2d6e | 644 | btr->cur_basic_field_type); |
f6ccaed9 | 645 | BT_ASSERT(ret == 11); |
e98a2d6e PP |
646 | status = read_unsigned_bitfield(buf, at, field_size, bo, |
647 | &f64.u); | |
50842bdc | 648 | if (status != BT_BTR_STATUS_OK) { |
dfef8367 PP |
649 | BT_LOGW("Cannot read unsigned 64-bit bit array for floating point number field: " |
650 | "btr-addr=%p, status=%s", | |
50842bdc | 651 | btr, bt_btr_status_string(status)); |
e98a2d6e PP |
652 | goto end; |
653 | } | |
654 | ||
655 | dblval = f64.d; | |
656 | break; | |
657 | } | |
658 | default: | |
659 | /* Only 32-bit and 64-bit fields are supported currently */ | |
dfef8367 PP |
660 | BT_LOGW("Only 32-bit and 64-bit floating point number fields are supported: " |
661 | "btr-addr=%p", btr); | |
50842bdc | 662 | status = BT_BTR_STATUS_ERROR; |
e98a2d6e PP |
663 | goto end; |
664 | } | |
665 | ||
dfef8367 PP |
666 | BT_LOGV("Read floating point number value: btr=%p, cur=%zu, val=%f", |
667 | btr, at, dblval); | |
668 | ||
e98a2d6e | 669 | if (btr->user.cbs.types.floating_point) { |
dfef8367 | 670 | BT_LOGV("Calling user function (floating point number)."); |
e98a2d6e PP |
671 | status = btr->user.cbs.types.floating_point(dblval, |
672 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 | 673 | BT_LOGV("User function returned: status=%s", |
50842bdc PP |
674 | bt_btr_status_string(status)); |
675 | if (status != BT_BTR_STATUS_OK) { | |
dfef8367 | 676 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
50842bdc | 677 | btr, bt_btr_status_string(status)); |
dfef8367 | 678 | } |
e98a2d6e PP |
679 | } |
680 | ||
681 | end: | |
682 | return status; | |
683 | } | |
684 | ||
685 | static inline | |
50842bdc | 686 | enum bt_btr_status read_basic_int_and_call(struct bt_btr *btr, |
dfef8367 | 687 | const uint8_t *buf, size_t at, |
50842bdc PP |
688 | struct bt_field_type *int_type, |
689 | struct bt_field_type *orig_type) | |
e98a2d6e | 690 | { |
50842bdc | 691 | bt_bool signd; |
e98a2d6e | 692 | int64_t field_size; |
50842bdc PP |
693 | enum bt_byte_order bo; |
694 | enum bt_btr_status status = BT_BTR_STATUS_OK; | |
e98a2d6e | 695 | |
50842bdc | 696 | signd = bt_field_type_integer_is_signed(int_type); |
e98a2d6e PP |
697 | field_size = get_basic_field_type_size(btr, int_type); |
698 | if (field_size < 1) { | |
dfef8367 PP |
699 | BT_LOGW("Cannot get integer field type's size: " |
700 | "btr=%p, at=%zu, ft-addr=%p", | |
701 | btr, at, int_type); | |
50842bdc | 702 | status = BT_BTR_STATUS_ERROR; |
e98a2d6e PP |
703 | goto end; |
704 | } | |
705 | ||
50842bdc | 706 | bo = bt_field_type_get_byte_order(int_type); |
e98a2d6e PP |
707 | |
708 | /* | |
709 | * Update current byte order now because we could be reading | |
710 | * the integer value of an enumeration type, and thus we know | |
711 | * here the actual supporting integer type's byte order. | |
712 | */ | |
713 | btr->cur_bo = bo; | |
714 | ||
715 | if (signd) { | |
716 | int64_t v; | |
717 | ||
718 | status = read_signed_bitfield(buf, at, field_size, bo, &v); | |
50842bdc | 719 | if (status != BT_BTR_STATUS_OK) { |
dfef8367 PP |
720 | BT_LOGW("Cannot read signed bit array for signed integer field: " |
721 | "btr-addr=%p, status=%s", | |
50842bdc | 722 | btr, bt_btr_status_string(status)); |
e98a2d6e PP |
723 | goto end; |
724 | } | |
725 | ||
726 | if (btr->user.cbs.types.signed_int) { | |
dfef8367 | 727 | BT_LOGV("Calling user function (signed integer)."); |
e98a2d6e PP |
728 | status = btr->user.cbs.types.signed_int(v, |
729 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 | 730 | BT_LOGV("User function returned: status=%s", |
50842bdc PP |
731 | bt_btr_status_string(status)); |
732 | if (status != BT_BTR_STATUS_OK) { | |
dfef8367 PP |
733 | BT_LOGW("User function failed: " |
734 | "btr-addr=%p, status=%s", | |
50842bdc | 735 | btr, bt_btr_status_string(status)); |
dfef8367 | 736 | } |
e98a2d6e PP |
737 | } |
738 | } else { | |
739 | uint64_t v; | |
740 | ||
741 | status = read_unsigned_bitfield(buf, at, field_size, bo, &v); | |
50842bdc | 742 | if (status != BT_BTR_STATUS_OK) { |
dfef8367 PP |
743 | BT_LOGW("Cannot read unsigned bit array for unsigned integer field: " |
744 | "btr-addr=%p, status=%s", | |
50842bdc | 745 | btr, bt_btr_status_string(status)); |
e98a2d6e PP |
746 | goto end; |
747 | } | |
748 | ||
749 | if (btr->user.cbs.types.unsigned_int) { | |
dfef8367 | 750 | BT_LOGV("Calling user function (unsigned integer)."); |
e98a2d6e PP |
751 | status = btr->user.cbs.types.unsigned_int(v, |
752 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 | 753 | BT_LOGV("User function returned: status=%s", |
50842bdc PP |
754 | bt_btr_status_string(status)); |
755 | if (status != BT_BTR_STATUS_OK) { | |
dfef8367 PP |
756 | BT_LOGW("User function failed: " |
757 | "btr-addr=%p, status=%s", | |
50842bdc | 758 | btr, bt_btr_status_string(status)); |
dfef8367 | 759 | } |
e98a2d6e PP |
760 | } |
761 | } | |
762 | ||
763 | end: | |
764 | return status; | |
765 | } | |
766 | ||
767 | static | |
50842bdc | 768 | enum bt_btr_status read_basic_int_and_call_cb(struct bt_btr *btr, |
dfef8367 | 769 | const uint8_t *buf, size_t at) |
e98a2d6e PP |
770 | { |
771 | return read_basic_int_and_call(btr, buf, at, btr->cur_basic_field_type, | |
772 | btr->cur_basic_field_type); | |
773 | } | |
774 | ||
775 | static | |
50842bdc | 776 | enum bt_btr_status read_basic_enum_and_call_cb(struct bt_btr *btr, |
dfef8367 | 777 | const uint8_t *buf, size_t at) |
e98a2d6e | 778 | { |
50842bdc PP |
779 | struct bt_field_type *int_field_type; |
780 | enum bt_btr_status status = BT_BTR_STATUS_OK; | |
e98a2d6e | 781 | |
5ae32b51 | 782 | int_field_type = bt_field_type_enumeration_borrow_container_field_type( |
e98a2d6e | 783 | btr->cur_basic_field_type); |
f6ccaed9 | 784 | BT_ASSERT(int_field_type); |
e98a2d6e PP |
785 | status = read_basic_int_and_call(btr, buf, at, |
786 | int_field_type, btr->cur_basic_field_type); | |
e98a2d6e PP |
787 | return status; |
788 | } | |
789 | ||
790 | static inline | |
50842bdc | 791 | enum bt_btr_status read_basic_type_and_call_continue(struct bt_btr *btr, |
dfef8367 | 792 | read_basic_and_call_cb_t read_basic_and_call_cb) |
e98a2d6e PP |
793 | { |
794 | size_t available; | |
795 | int64_t field_size; | |
796 | int64_t needed_bits; | |
50842bdc | 797 | enum bt_btr_status status = BT_BTR_STATUS_OK; |
e98a2d6e PP |
798 | |
799 | if (!at_least_one_bit_left(btr)) { | |
dfef8367 | 800 | BT_LOGV("Reached end of data: btr-addr=%p", btr); |
50842bdc | 801 | status = BT_BTR_STATUS_EOF; |
e98a2d6e PP |
802 | goto end; |
803 | } | |
804 | ||
805 | field_size = get_basic_field_type_size(btr, btr->cur_basic_field_type); | |
806 | if (field_size < 1) { | |
dfef8367 PP |
807 | BT_LOGW("Cannot get basic field type's size: " |
808 | "btr-addr=%p, ft-addr=%p", | |
809 | btr, btr->cur_basic_field_type); | |
50842bdc | 810 | status = BT_BTR_STATUS_ERROR; |
e98a2d6e PP |
811 | goto end; |
812 | } | |
813 | ||
814 | available = available_bits(btr); | |
815 | needed_bits = field_size - btr->stitch.at; | |
dfef8367 PP |
816 | BT_LOGV("Continuing basic field decoding: " |
817 | "btr-addr=%p, field-size=%" PRId64 ", needed-size=%" PRId64 ", " | |
818 | "available-size=%zu", | |
819 | btr, field_size, needed_bits, available); | |
e98a2d6e PP |
820 | if (needed_bits <= available) { |
821 | /* We have all the bits; append to stitch, then decode */ | |
822 | stitch_append_from_buf(btr, needed_bits); | |
823 | status = read_basic_and_call_cb(btr, btr->stitch.buf, | |
824 | btr->stitch.offset); | |
50842bdc | 825 | if (status != BT_BTR_STATUS_OK) { |
dfef8367 PP |
826 | BT_LOGW("Cannot read basic field: " |
827 | "btr-addr=%p, ft-addr=%p, status=%s", | |
828 | btr, btr->cur_basic_field_type, | |
50842bdc | 829 | bt_btr_status_string(status)); |
e98a2d6e PP |
830 | goto end; |
831 | } | |
832 | ||
833 | if (stack_empty(btr->stack)) { | |
834 | /* Root is a basic type */ | |
835 | btr->state = BTR_STATE_DONE; | |
836 | } else { | |
837 | /* Go to next field */ | |
838 | stack_top(btr->stack)->index++; | |
839 | btr->state = BTR_STATE_NEXT_FIELD; | |
840 | btr->last_bo = btr->cur_bo; | |
841 | } | |
842 | goto end; | |
843 | } | |
844 | ||
845 | /* We are here; it means we don't have enough data to decode this */ | |
dfef8367 | 846 | BT_LOGV_STR("Not enough data to read the next basic field: appending to stitch buffer."); |
e98a2d6e | 847 | stitch_append_from_remaining_buf(btr); |
50842bdc | 848 | status = BT_BTR_STATUS_EOF; |
e98a2d6e PP |
849 | |
850 | end: | |
851 | return status; | |
852 | } | |
853 | ||
854 | static inline | |
50842bdc | 855 | enum bt_btr_status read_basic_type_and_call_begin(struct bt_btr *btr, |
dfef8367 | 856 | read_basic_and_call_cb_t read_basic_and_call_cb) |
e98a2d6e PP |
857 | { |
858 | size_t available; | |
859 | int64_t field_size; | |
50842bdc PP |
860 | enum bt_byte_order bo; |
861 | enum bt_btr_status status = BT_BTR_STATUS_OK; | |
e98a2d6e PP |
862 | |
863 | if (!at_least_one_bit_left(btr)) { | |
dfef8367 | 864 | BT_LOGV("Reached end of data: btr-addr=%p", btr); |
50842bdc | 865 | status = BT_BTR_STATUS_EOF; |
e98a2d6e PP |
866 | goto end; |
867 | } | |
868 | ||
869 | field_size = get_basic_field_type_size(btr, btr->cur_basic_field_type); | |
e98a2d6e | 870 | if (field_size < 1) { |
dfef8367 PP |
871 | BT_LOGW("Cannot get basic field type's size: " |
872 | "btr-addr=%p, ft-addr=%p", | |
873 | btr, btr->cur_basic_field_type); | |
50842bdc | 874 | status = BT_BTR_STATUS_ERROR; |
e98a2d6e PP |
875 | goto end; |
876 | } | |
877 | ||
50842bdc | 878 | bo = bt_field_type_get_byte_order(btr->cur_basic_field_type); |
e98a2d6e | 879 | status = validate_contiguous_bo(btr, bo); |
50842bdc | 880 | if (status != BT_BTR_STATUS_OK) { |
dfef8367 | 881 | /* validate_contiguous_bo() logs errors */ |
e98a2d6e PP |
882 | goto end; |
883 | } | |
884 | ||
885 | available = available_bits(btr); | |
886 | ||
887 | if (field_size <= available) { | |
888 | /* We have all the bits; decode and set now */ | |
f6ccaed9 | 889 | BT_ASSERT(btr->buf.addr); |
e98a2d6e PP |
890 | status = read_basic_and_call_cb(btr, btr->buf.addr, |
891 | buf_at_from_addr(btr)); | |
50842bdc | 892 | if (status != BT_BTR_STATUS_OK) { |
dfef8367 PP |
893 | BT_LOGW("Cannot read basic field: " |
894 | "btr-addr=%p, ft-addr=%p, status=%s", | |
895 | btr, btr->cur_basic_field_type, | |
50842bdc | 896 | bt_btr_status_string(status)); |
e98a2d6e PP |
897 | goto end; |
898 | } | |
899 | ||
900 | consume_bits(btr, field_size); | |
901 | ||
902 | if (stack_empty(btr->stack)) { | |
903 | /* Root is a basic type */ | |
904 | btr->state = BTR_STATE_DONE; | |
905 | } else { | |
906 | /* Go to next field */ | |
907 | stack_top(btr->stack)->index++; | |
908 | btr->state = BTR_STATE_NEXT_FIELD; | |
909 | btr->last_bo = btr->cur_bo; | |
910 | } | |
911 | ||
912 | goto end; | |
913 | } | |
914 | ||
915 | /* We are here; it means we don't have enough data to decode this */ | |
dfef8367 | 916 | BT_LOGV_STR("Not enough data to read the next basic field: setting stitch buffer."); |
e98a2d6e PP |
917 | stitch_set_from_remaining_buf(btr); |
918 | btr->state = BTR_STATE_READ_BASIC_CONTINUE; | |
50842bdc | 919 | status = BT_BTR_STATUS_EOF; |
e98a2d6e PP |
920 | |
921 | end: | |
922 | return status; | |
923 | } | |
924 | ||
925 | static inline | |
50842bdc PP |
926 | enum bt_btr_status read_basic_int_type_and_call_begin( |
927 | struct bt_btr *btr) | |
e98a2d6e PP |
928 | { |
929 | return read_basic_type_and_call_begin(btr, read_basic_int_and_call_cb); | |
930 | } | |
931 | ||
932 | static inline | |
50842bdc PP |
933 | enum bt_btr_status read_basic_int_type_and_call_continue( |
934 | struct bt_btr *btr) | |
e98a2d6e PP |
935 | { |
936 | return read_basic_type_and_call_continue(btr, | |
937 | read_basic_int_and_call_cb); | |
938 | } | |
939 | ||
940 | static inline | |
50842bdc PP |
941 | enum bt_btr_status read_basic_float_type_and_call_begin( |
942 | struct bt_btr *btr) | |
e98a2d6e PP |
943 | { |
944 | return read_basic_type_and_call_begin(btr, | |
945 | read_basic_float_and_call_cb); | |
946 | } | |
947 | ||
948 | static inline | |
50842bdc PP |
949 | enum bt_btr_status read_basic_float_type_and_call_continue( |
950 | struct bt_btr *btr) | |
e98a2d6e PP |
951 | { |
952 | return read_basic_type_and_call_continue(btr, | |
953 | read_basic_float_and_call_cb); | |
954 | } | |
955 | ||
956 | static inline | |
50842bdc PP |
957 | enum bt_btr_status read_basic_enum_type_and_call_begin( |
958 | struct bt_btr *btr) | |
e98a2d6e PP |
959 | { |
960 | return read_basic_type_and_call_begin(btr, | |
961 | read_basic_enum_and_call_cb); | |
962 | } | |
963 | ||
964 | static inline | |
50842bdc PP |
965 | enum bt_btr_status read_basic_enum_type_and_call_continue( |
966 | struct bt_btr *btr) | |
e98a2d6e PP |
967 | { |
968 | return read_basic_type_and_call_continue(btr, | |
969 | read_basic_enum_and_call_cb); | |
970 | } | |
971 | ||
972 | static inline | |
50842bdc PP |
973 | enum bt_btr_status read_basic_string_type_and_call( |
974 | struct bt_btr *btr, bool begin) | |
e98a2d6e PP |
975 | { |
976 | size_t buf_at_bytes; | |
977 | const uint8_t *result; | |
978 | size_t available_bytes; | |
979 | const uint8_t *first_chr; | |
50842bdc | 980 | enum bt_btr_status status = BT_BTR_STATUS_OK; |
e98a2d6e PP |
981 | |
982 | if (!at_least_one_bit_left(btr)) { | |
dfef8367 | 983 | BT_LOGV("Reached end of data: btr-addr=%p", btr); |
50842bdc | 984 | status = BT_BTR_STATUS_EOF; |
e98a2d6e PP |
985 | goto end; |
986 | } | |
987 | ||
f6ccaed9 | 988 | BT_ASSERT(buf_at_from_addr(btr) % 8 == 0); |
e98a2d6e PP |
989 | available_bytes = BITS_TO_BYTES_FLOOR(available_bits(btr)); |
990 | buf_at_bytes = BITS_TO_BYTES_FLOOR(buf_at_from_addr(btr)); | |
f6ccaed9 | 991 | BT_ASSERT(btr->buf.addr); |
e98a2d6e PP |
992 | first_chr = &btr->buf.addr[buf_at_bytes]; |
993 | result = memchr(first_chr, '\0', available_bytes); | |
994 | ||
995 | if (begin && btr->user.cbs.types.string_begin) { | |
dfef8367 | 996 | BT_LOGV("Calling user function (string, beginning)."); |
e98a2d6e PP |
997 | status = btr->user.cbs.types.string_begin( |
998 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 | 999 | BT_LOGV("User function returned: status=%s", |
50842bdc PP |
1000 | bt_btr_status_string(status)); |
1001 | if (status != BT_BTR_STATUS_OK) { | |
dfef8367 | 1002 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
50842bdc | 1003 | btr, bt_btr_status_string(status)); |
e98a2d6e PP |
1004 | goto end; |
1005 | } | |
1006 | } | |
1007 | ||
1008 | if (!result) { | |
1009 | /* No null character yet */ | |
1010 | if (btr->user.cbs.types.string) { | |
dfef8367 | 1011 | BT_LOGV("Calling user function (substring)."); |
e98a2d6e PP |
1012 | status = btr->user.cbs.types.string( |
1013 | (const char *) first_chr, | |
1014 | available_bytes, btr->cur_basic_field_type, | |
1015 | btr->user.data); | |
dfef8367 | 1016 | BT_LOGV("User function returned: status=%s", |
50842bdc PP |
1017 | bt_btr_status_string(status)); |
1018 | if (status != BT_BTR_STATUS_OK) { | |
dfef8367 PP |
1019 | BT_LOGW("User function failed: " |
1020 | "btr-addr=%p, status=%s", | |
50842bdc | 1021 | btr, bt_btr_status_string(status)); |
e98a2d6e PP |
1022 | goto end; |
1023 | } | |
1024 | } | |
1025 | ||
1026 | consume_bits(btr, BYTES_TO_BITS(available_bytes)); | |
1027 | btr->state = BTR_STATE_READ_BASIC_CONTINUE; | |
50842bdc | 1028 | status = BT_BTR_STATUS_EOF; |
e98a2d6e PP |
1029 | } else { |
1030 | /* Found the null character */ | |
1031 | size_t result_len = (size_t) (result - first_chr); | |
1032 | ||
1033 | if (btr->user.cbs.types.string && result_len) { | |
dfef8367 | 1034 | BT_LOGV("Calling user function (substring)."); |
e98a2d6e PP |
1035 | status = btr->user.cbs.types.string( |
1036 | (const char *) first_chr, | |
1037 | result_len, btr->cur_basic_field_type, | |
1038 | btr->user.data); | |
dfef8367 | 1039 | BT_LOGV("User function returned: status=%s", |
50842bdc PP |
1040 | bt_btr_status_string(status)); |
1041 | if (status != BT_BTR_STATUS_OK) { | |
dfef8367 PP |
1042 | BT_LOGW("User function failed: " |
1043 | "btr-addr=%p, status=%s", | |
50842bdc | 1044 | btr, bt_btr_status_string(status)); |
e98a2d6e PP |
1045 | goto end; |
1046 | } | |
1047 | } | |
1048 | ||
1049 | if (btr->user.cbs.types.string_end) { | |
dfef8367 | 1050 | BT_LOGV("Calling user function (string, end)."); |
e98a2d6e PP |
1051 | status = btr->user.cbs.types.string_end( |
1052 | btr->cur_basic_field_type, btr->user.data); | |
dfef8367 | 1053 | BT_LOGV("User function returned: status=%s", |
50842bdc PP |
1054 | bt_btr_status_string(status)); |
1055 | if (status != BT_BTR_STATUS_OK) { | |
dfef8367 PP |
1056 | BT_LOGW("User function failed: " |
1057 | "btr-addr=%p, status=%s", | |
50842bdc | 1058 | btr, bt_btr_status_string(status)); |
e98a2d6e PP |
1059 | goto end; |
1060 | } | |
1061 | } | |
1062 | ||
1063 | consume_bits(btr, BYTES_TO_BITS(result_len + 1)); | |
1064 | ||
1065 | if (stack_empty(btr->stack)) { | |
1066 | /* Root is a basic type */ | |
1067 | btr->state = BTR_STATE_DONE; | |
1068 | } else { | |
1069 | /* Go to next field */ | |
1070 | stack_top(btr->stack)->index++; | |
1071 | btr->state = BTR_STATE_NEXT_FIELD; | |
1072 | btr->last_bo = btr->cur_bo; | |
1073 | } | |
1074 | } | |
1075 | ||
1076 | end: | |
1077 | return status; | |
1078 | } | |
1079 | ||
1080 | static inline | |
50842bdc | 1081 | enum bt_btr_status read_basic_begin_state(struct bt_btr *btr) |
e98a2d6e | 1082 | { |
50842bdc | 1083 | enum bt_btr_status status; |
e98a2d6e | 1084 | |
f6ccaed9 | 1085 | BT_ASSERT(btr->cur_basic_field_type); |
e98a2d6e | 1086 | |
50842bdc PP |
1087 | switch (bt_field_type_get_type_id(btr->cur_basic_field_type)) { |
1088 | case BT_FIELD_TYPE_ID_INTEGER: | |
e98a2d6e PP |
1089 | status = read_basic_int_type_and_call_begin(btr); |
1090 | break; | |
50842bdc | 1091 | case BT_FIELD_TYPE_ID_FLOAT: |
e98a2d6e PP |
1092 | status = read_basic_float_type_and_call_begin(btr); |
1093 | break; | |
50842bdc | 1094 | case BT_FIELD_TYPE_ID_ENUM: |
e98a2d6e PP |
1095 | status = read_basic_enum_type_and_call_begin(btr); |
1096 | break; | |
50842bdc | 1097 | case BT_FIELD_TYPE_ID_STRING: |
e98a2d6e PP |
1098 | status = read_basic_string_type_and_call(btr, true); |
1099 | break; | |
1100 | default: | |
dfef8367 PP |
1101 | BT_LOGF("Unknown basic field type ID: " |
1102 | "btr-addr=%p, ft-addr=%p, ft-id=%s", | |
1103 | btr, btr->cur_basic_field_type, | |
3dca2276 | 1104 | bt_common_field_type_id_string( |
50842bdc | 1105 | bt_field_type_get_type_id( |
dfef8367 | 1106 | btr->cur_basic_field_type))); |
0fbb9a9f | 1107 | abort(); |
e98a2d6e PP |
1108 | } |
1109 | ||
1110 | return status; | |
1111 | } | |
1112 | ||
1113 | static inline | |
50842bdc | 1114 | enum bt_btr_status read_basic_continue_state(struct bt_btr *btr) |
e98a2d6e | 1115 | { |
50842bdc | 1116 | enum bt_btr_status status; |
e98a2d6e | 1117 | |
f6ccaed9 | 1118 | BT_ASSERT(btr->cur_basic_field_type); |
e98a2d6e | 1119 | |
50842bdc PP |
1120 | switch (bt_field_type_get_type_id(btr->cur_basic_field_type)) { |
1121 | case BT_FIELD_TYPE_ID_INTEGER: | |
e98a2d6e PP |
1122 | status = read_basic_int_type_and_call_continue(btr); |
1123 | break; | |
50842bdc | 1124 | case BT_FIELD_TYPE_ID_FLOAT: |
e98a2d6e PP |
1125 | status = read_basic_float_type_and_call_continue(btr); |
1126 | break; | |
50842bdc | 1127 | case BT_FIELD_TYPE_ID_ENUM: |
e98a2d6e PP |
1128 | status = read_basic_enum_type_and_call_continue(btr); |
1129 | break; | |
50842bdc | 1130 | case BT_FIELD_TYPE_ID_STRING: |
e98a2d6e PP |
1131 | status = read_basic_string_type_and_call(btr, false); |
1132 | break; | |
1133 | default: | |
dfef8367 PP |
1134 | BT_LOGF("Unknown basic field type ID: " |
1135 | "btr-addr=%p, ft-addr=%p, ft-id=%s", | |
1136 | btr, btr->cur_basic_field_type, | |
3dca2276 | 1137 | bt_common_field_type_id_string( |
50842bdc | 1138 | bt_field_type_get_type_id( |
dfef8367 | 1139 | btr->cur_basic_field_type))); |
0fbb9a9f | 1140 | abort(); |
e98a2d6e PP |
1141 | } |
1142 | ||
1143 | return status; | |
1144 | } | |
1145 | ||
1146 | static inline | |
50842bdc | 1147 | size_t bits_to_skip_to_align_to(struct bt_btr *btr, size_t align) |
e98a2d6e PP |
1148 | { |
1149 | size_t aligned_packet_at; | |
1150 | ||
1151 | aligned_packet_at = ALIGN(packet_at(btr), align); | |
e98a2d6e PP |
1152 | return aligned_packet_at - packet_at(btr); |
1153 | } | |
1154 | ||
1155 | static inline | |
50842bdc PP |
1156 | enum bt_btr_status align_type_state(struct bt_btr *btr, |
1157 | struct bt_field_type *field_type, enum btr_state next_state) | |
e98a2d6e PP |
1158 | { |
1159 | int field_alignment; | |
1160 | size_t skip_bits; | |
50842bdc | 1161 | enum bt_btr_status status = BT_BTR_STATUS_OK; |
e98a2d6e PP |
1162 | |
1163 | /* Get field's alignment */ | |
50842bdc | 1164 | field_alignment = bt_field_type_get_alignment(field_type); |
e98a2d6e | 1165 | if (field_alignment < 0) { |
dfef8367 PP |
1166 | BT_LOGW("Cannot get field type's alignment: " |
1167 | "btr-addr=%p, ft-addr=%p, ft-id=%s", | |
1168 | btr, field_type, | |
3dca2276 | 1169 | bt_common_field_type_id_string( |
50842bdc PP |
1170 | bt_field_type_get_type_id(field_type))); |
1171 | status = BT_BTR_STATUS_ERROR; | |
e98a2d6e PP |
1172 | goto end; |
1173 | } | |
1174 | ||
1175 | /* | |
1176 | * 0 means "undefined" for variants; what we really want is 1 | |
1177 | * (always aligned) | |
1178 | */ | |
1179 | if (field_alignment == 0) { | |
1180 | field_alignment = 1; | |
1181 | } | |
1182 | ||
1183 | /* Compute how many bits we need to skip */ | |
1184 | skip_bits = bits_to_skip_to_align_to(btr, field_alignment); | |
1185 | ||
1186 | /* Nothing to skip? aligned */ | |
1187 | if (skip_bits == 0) { | |
1188 | btr->state = next_state; | |
1189 | goto end; | |
1190 | } | |
1191 | ||
1192 | /* Make sure there's at least one bit left */ | |
1193 | if (!at_least_one_bit_left(btr)) { | |
50842bdc | 1194 | status = BT_BTR_STATUS_EOF; |
e98a2d6e PP |
1195 | goto end; |
1196 | } | |
1197 | ||
1198 | /* Consume as many bits as possible in what's left */ | |
1199 | consume_bits(btr, MIN(available_bits(btr), skip_bits)); | |
1200 | ||
1201 | /* Are we done now? */ | |
1202 | skip_bits = bits_to_skip_to_align_to(btr, field_alignment); | |
e98a2d6e PP |
1203 | if (skip_bits == 0) { |
1204 | /* Yes: go to next state */ | |
1205 | btr->state = next_state; | |
1206 | goto end; | |
1207 | } else { | |
1208 | /* No: need more data */ | |
dfef8367 | 1209 | BT_LOGV("Reached end of data when aligning: btr-addr=%p", btr); |
50842bdc | 1210 | status = BT_BTR_STATUS_EOF; |
e98a2d6e PP |
1211 | } |
1212 | ||
1213 | end: | |
1214 | return status; | |
1215 | } | |
1216 | ||
1217 | static inline | |
50842bdc | 1218 | bool is_compound_type(struct bt_field_type *field_type) |
e98a2d6e | 1219 | { |
50842bdc | 1220 | enum bt_field_type_id id = bt_field_type_get_type_id(field_type); |
e98a2d6e | 1221 | |
50842bdc PP |
1222 | return id == BT_FIELD_TYPE_ID_STRUCT || id == BT_FIELD_TYPE_ID_ARRAY || |
1223 | id == BT_FIELD_TYPE_ID_SEQUENCE || id == BT_FIELD_TYPE_ID_VARIANT; | |
e98a2d6e PP |
1224 | } |
1225 | ||
1226 | static inline | |
50842bdc | 1227 | enum bt_btr_status next_field_state(struct bt_btr *btr) |
e98a2d6e PP |
1228 | { |
1229 | int ret; | |
1230 | struct stack_entry *top; | |
50842bdc PP |
1231 | struct bt_field_type *next_field_type = NULL; |
1232 | enum bt_btr_status status = BT_BTR_STATUS_OK; | |
e98a2d6e PP |
1233 | |
1234 | if (stack_empty(btr->stack)) { | |
1235 | goto end; | |
1236 | } | |
1237 | ||
1238 | top = stack_top(btr->stack); | |
1239 | ||
1240 | /* Are we done with this base type? */ | |
1241 | while (top->index == top->base_len) { | |
1242 | if (btr->user.cbs.types.compound_end) { | |
dfef8367 | 1243 | BT_LOGV("Calling user function (compound, end)."); |
e98a2d6e PP |
1244 | status = btr->user.cbs.types.compound_end( |
1245 | top->base_type, btr->user.data); | |
dfef8367 | 1246 | BT_LOGV("User function returned: status=%s", |
50842bdc PP |
1247 | bt_btr_status_string(status)); |
1248 | if (status != BT_BTR_STATUS_OK) { | |
dfef8367 | 1249 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
50842bdc | 1250 | btr, bt_btr_status_string(status)); |
e98a2d6e PP |
1251 | goto end; |
1252 | } | |
1253 | } | |
1254 | ||
1255 | stack_pop(btr->stack); | |
1256 | ||
1257 | /* Are we done with the root type? */ | |
1258 | if (stack_empty(btr->stack)) { | |
1259 | btr->state = BTR_STATE_DONE; | |
1260 | goto end; | |
1261 | } | |
1262 | ||
1263 | top = stack_top(btr->stack); | |
1264 | top->index++; | |
1265 | } | |
1266 | ||
1267 | /* Get next field's type */ | |
50842bdc PP |
1268 | switch (bt_field_type_get_type_id(top->base_type)) { |
1269 | case BT_FIELD_TYPE_ID_STRUCT: | |
5ae32b51 | 1270 | ret = bt_field_type_structure_borrow_field_by_index( |
e98a2d6e PP |
1271 | top->base_type, NULL, &next_field_type, |
1272 | top->index); | |
1273 | if (ret) { | |
1274 | next_field_type = NULL; | |
1275 | } | |
1276 | break; | |
50842bdc | 1277 | case BT_FIELD_TYPE_ID_ARRAY: |
e98a2d6e | 1278 | next_field_type = |
5ae32b51 | 1279 | bt_field_type_array_borrow_element_field_type( |
e98a2d6e PP |
1280 | top->base_type); |
1281 | break; | |
50842bdc | 1282 | case BT_FIELD_TYPE_ID_SEQUENCE: |
e98a2d6e | 1283 | next_field_type = |
5ae32b51 | 1284 | bt_field_type_sequence_borrow_element_field_type( |
e98a2d6e PP |
1285 | top->base_type); |
1286 | break; | |
50842bdc | 1287 | case BT_FIELD_TYPE_ID_VARIANT: |
e98a2d6e PP |
1288 | /* Variant types are dynamic: query the user, he should know! */ |
1289 | next_field_type = | |
5ae32b51 | 1290 | btr->user.cbs.query.borrow_variant_field_type( |
e98a2d6e PP |
1291 | top->base_type, btr->user.data); |
1292 | break; | |
1293 | default: | |
1294 | break; | |
1295 | } | |
1296 | ||
1297 | if (!next_field_type) { | |
dfef8367 PP |
1298 | BT_LOGW("Cannot get the field type of the next field: " |
1299 | "btr-addr=%p, base-ft-addr=%p, base-ft-id=%s, " | |
1300 | "index=%" PRId64, | |
1301 | btr, top->base_type, | |
3dca2276 | 1302 | bt_common_field_type_id_string( |
50842bdc | 1303 | bt_field_type_get_type_id(top->base_type)), |
dfef8367 | 1304 | top->index); |
50842bdc | 1305 | status = BT_BTR_STATUS_ERROR; |
e98a2d6e PP |
1306 | goto end; |
1307 | } | |
1308 | ||
1309 | if (is_compound_type(next_field_type)) { | |
1310 | if (btr->user.cbs.types.compound_begin) { | |
dfef8367 | 1311 | BT_LOGV("Calling user function (compound, begin)."); |
e98a2d6e PP |
1312 | status = btr->user.cbs.types.compound_begin( |
1313 | next_field_type, btr->user.data); | |
dfef8367 | 1314 | BT_LOGV("User function returned: status=%s", |
50842bdc PP |
1315 | bt_btr_status_string(status)); |
1316 | if (status != BT_BTR_STATUS_OK) { | |
dfef8367 | 1317 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
50842bdc | 1318 | btr, bt_btr_status_string(status)); |
e98a2d6e PP |
1319 | goto end; |
1320 | } | |
1321 | } | |
1322 | ||
1323 | ret = stack_push_with_len(btr, next_field_type); | |
1324 | if (ret) { | |
dfef8367 | 1325 | /* stack_push_with_len() logs errors */ |
50842bdc | 1326 | status = BT_BTR_STATUS_ERROR; |
e98a2d6e PP |
1327 | goto end; |
1328 | } | |
1329 | ||
1330 | /* Next state: align a compound type */ | |
1331 | btr->state = BTR_STATE_ALIGN_COMPOUND; | |
1332 | } else { | |
1333 | /* Replace current basic field type */ | |
dfef8367 PP |
1334 | BT_LOGV("Replacing current basic field type: " |
1335 | "btr-addr=%p, cur-basic-ft-addr=%p, " | |
1336 | "next-basic-ft-addr=%p", | |
1337 | btr, btr->cur_basic_field_type, next_field_type); | |
5ae32b51 | 1338 | btr->cur_basic_field_type = next_field_type; |
e98a2d6e PP |
1339 | |
1340 | /* Next state: align a basic type */ | |
1341 | btr->state = BTR_STATE_ALIGN_BASIC; | |
1342 | } | |
1343 | ||
1344 | end: | |
e98a2d6e PP |
1345 | return status; |
1346 | } | |
1347 | ||
1348 | static inline | |
50842bdc | 1349 | enum bt_btr_status handle_state(struct bt_btr *btr) |
e98a2d6e | 1350 | { |
50842bdc | 1351 | enum bt_btr_status status = BT_BTR_STATUS_OK; |
e98a2d6e | 1352 | |
dfef8367 PP |
1353 | BT_LOGV("Handling state: btr-addr=%p, state=%s", |
1354 | btr, btr_state_string(btr->state)); | |
1355 | ||
e98a2d6e PP |
1356 | switch (btr->state) { |
1357 | case BTR_STATE_NEXT_FIELD: | |
1358 | status = next_field_state(btr); | |
1359 | break; | |
1360 | case BTR_STATE_ALIGN_BASIC: | |
1361 | status = align_type_state(btr, btr->cur_basic_field_type, | |
1362 | BTR_STATE_READ_BASIC_BEGIN); | |
1363 | break; | |
1364 | case BTR_STATE_ALIGN_COMPOUND: | |
1365 | status = align_type_state(btr, stack_top(btr->stack)->base_type, | |
1366 | BTR_STATE_NEXT_FIELD); | |
1367 | break; | |
1368 | case BTR_STATE_READ_BASIC_BEGIN: | |
1369 | status = read_basic_begin_state(btr); | |
1370 | break; | |
1371 | case BTR_STATE_READ_BASIC_CONTINUE: | |
1372 | status = read_basic_continue_state(btr); | |
1373 | break; | |
1374 | case BTR_STATE_DONE: | |
1375 | break; | |
1376 | } | |
1377 | ||
dfef8367 | 1378 | BT_LOGV("Handled state: btr-addr=%p, status=%s", |
50842bdc | 1379 | btr, bt_btr_status_string(status)); |
e98a2d6e PP |
1380 | return status; |
1381 | } | |
1382 | ||
50842bdc | 1383 | struct bt_btr *bt_btr_create(struct bt_btr_cbs cbs, void *data) |
e98a2d6e | 1384 | { |
50842bdc | 1385 | struct bt_btr *btr; |
e98a2d6e | 1386 | |
dfef8367 | 1387 | BT_LOGD_STR("Creating binary type reader (BTR)."); |
50842bdc | 1388 | btr = g_new0(struct bt_btr, 1); |
e98a2d6e | 1389 | if (!btr) { |
dfef8367 | 1390 | BT_LOGE_STR("Failed to allocate one binary type reader."); |
e98a2d6e PP |
1391 | goto end; |
1392 | } | |
1393 | ||
1394 | btr->stack = stack_new(); | |
1395 | if (!btr->stack) { | |
dfef8367 | 1396 | BT_LOGE_STR("Cannot create BTR's stack."); |
50842bdc | 1397 | bt_btr_destroy(btr); |
e98a2d6e PP |
1398 | btr = NULL; |
1399 | goto end; | |
1400 | } | |
1401 | ||
1402 | btr->state = BTR_STATE_NEXT_FIELD; | |
1403 | btr->user.cbs = cbs; | |
1404 | btr->user.data = data; | |
dfef8367 | 1405 | BT_LOGD("Created BTR: addr=%p", btr); |
e98a2d6e PP |
1406 | |
1407 | end: | |
1408 | return btr; | |
1409 | } | |
1410 | ||
50842bdc | 1411 | void bt_btr_destroy(struct bt_btr *btr) |
e98a2d6e PP |
1412 | { |
1413 | if (btr->stack) { | |
1414 | stack_destroy(btr->stack); | |
1415 | } | |
1416 | ||
dfef8367 | 1417 | BT_LOGD("Destroying BTR: addr=%p", btr); |
e98a2d6e PP |
1418 | g_free(btr); |
1419 | } | |
1420 | ||
1421 | static | |
50842bdc | 1422 | void reset(struct bt_btr *btr) |
e98a2d6e | 1423 | { |
dfef8367 | 1424 | BT_LOGD("Resetting BTR: addr=%p", btr); |
e98a2d6e | 1425 | stack_clear(btr->stack); |
e98a2d6e PP |
1426 | stitch_reset(btr); |
1427 | btr->buf.addr = NULL; | |
50842bdc | 1428 | btr->last_bo = BT_BYTE_ORDER_UNKNOWN; |
e98a2d6e PP |
1429 | } |
1430 | ||
dfef8367 | 1431 | static |
50842bdc | 1432 | void update_packet_offset(struct bt_btr *btr) |
dfef8367 PP |
1433 | { |
1434 | BT_LOGV("Updating packet offset for next call: " | |
1435 | "btr-addr=%p, cur-packet-offset=%zu, next-packet-offset=%zu", | |
1436 | btr, btr->buf.packet_offset, | |
1437 | btr->buf.packet_offset + btr->buf.at); | |
1438 | btr->buf.packet_offset += btr->buf.at; | |
1439 | } | |
1440 | ||
50842bdc PP |
1441 | size_t bt_btr_start(struct bt_btr *btr, |
1442 | struct bt_field_type *type, const uint8_t *buf, | |
e98a2d6e | 1443 | size_t offset, size_t packet_offset, size_t sz, |
50842bdc | 1444 | enum bt_btr_status *status) |
e98a2d6e | 1445 | { |
f6ccaed9 PP |
1446 | BT_ASSERT(btr); |
1447 | BT_ASSERT(BYTES_TO_BITS(sz) >= offset); | |
e98a2d6e PP |
1448 | reset(btr); |
1449 | btr->buf.addr = buf; | |
1450 | btr->buf.offset = offset; | |
1451 | btr->buf.at = 0; | |
1452 | btr->buf.packet_offset = packet_offset; | |
1453 | btr->buf.buf_sz = sz; | |
1454 | btr->buf.sz = BYTES_TO_BITS(sz) - offset; | |
50842bdc | 1455 | *status = BT_BTR_STATUS_OK; |
e98a2d6e | 1456 | |
dfef8367 PP |
1457 | BT_LOGV("Starting decoding: btr-addr=%p, ft-addr=%p, " |
1458 | "buf-addr=%p, buf-size=%zu, offset=%zu, " | |
1459 | "packet-offset=%zu", | |
1460 | btr, type, buf, sz, offset, packet_offset); | |
1461 | ||
e98a2d6e PP |
1462 | /* Set root type */ |
1463 | if (is_compound_type(type)) { | |
1464 | /* Compound type: push on visit stack */ | |
1465 | int stack_ret; | |
1466 | ||
1467 | if (btr->user.cbs.types.compound_begin) { | |
dfef8367 | 1468 | BT_LOGV("Calling user function (compound, begin)."); |
e98a2d6e PP |
1469 | *status = btr->user.cbs.types.compound_begin( |
1470 | type, btr->user.data); | |
dfef8367 | 1471 | BT_LOGV("User function returned: status=%s", |
50842bdc PP |
1472 | bt_btr_status_string(*status)); |
1473 | if (*status != BT_BTR_STATUS_OK) { | |
dfef8367 | 1474 | BT_LOGW("User function failed: btr-addr=%p, status=%s", |
50842bdc | 1475 | btr, bt_btr_status_string(*status)); |
e98a2d6e PP |
1476 | goto end; |
1477 | } | |
1478 | } | |
1479 | ||
1480 | stack_ret = stack_push_with_len(btr, type); | |
1481 | if (stack_ret) { | |
dfef8367 | 1482 | /* stack_push_with_len() logs errors */ |
50842bdc | 1483 | *status = BT_BTR_STATUS_ERROR; |
e98a2d6e PP |
1484 | goto end; |
1485 | } | |
1486 | ||
1487 | btr->state = BTR_STATE_ALIGN_COMPOUND; | |
1488 | } else { | |
1489 | /* Basic type: set as current basic type */ | |
1490 | btr->cur_basic_field_type = type; | |
e98a2d6e PP |
1491 | btr->state = BTR_STATE_ALIGN_BASIC; |
1492 | } | |
1493 | ||
1494 | /* Run the machine! */ | |
dfef8367 PP |
1495 | BT_LOGV_STR("Running the state machine."); |
1496 | ||
e98a2d6e PP |
1497 | while (true) { |
1498 | *status = handle_state(btr); | |
50842bdc | 1499 | if (*status != BT_BTR_STATUS_OK || |
fdf0e7a0 | 1500 | btr->state == BTR_STATE_DONE) { |
e98a2d6e PP |
1501 | break; |
1502 | } | |
1503 | } | |
1504 | ||
1505 | /* Update packet offset for next time */ | |
dfef8367 | 1506 | update_packet_offset(btr); |
e98a2d6e PP |
1507 | |
1508 | end: | |
1509 | return btr->buf.at; | |
1510 | } | |
1511 | ||
50842bdc | 1512 | size_t bt_btr_continue(struct bt_btr *btr, |
e98a2d6e | 1513 | const uint8_t *buf, size_t sz, |
50842bdc | 1514 | enum bt_btr_status *status) |
e98a2d6e | 1515 | { |
f6ccaed9 PP |
1516 | BT_ASSERT(btr); |
1517 | BT_ASSERT(buf); | |
1518 | BT_ASSERT(sz > 0); | |
e98a2d6e PP |
1519 | btr->buf.addr = buf; |
1520 | btr->buf.offset = 0; | |
1521 | btr->buf.at = 0; | |
1522 | btr->buf.buf_sz = sz; | |
1523 | btr->buf.sz = BYTES_TO_BITS(sz); | |
50842bdc | 1524 | *status = BT_BTR_STATUS_OK; |
e98a2d6e | 1525 | |
dfef8367 PP |
1526 | BT_LOGV("Continuing decoding: btr-addr=%p, buf-addr=%p, buf-size=%zu", |
1527 | btr, buf, sz); | |
1528 | ||
e98a2d6e | 1529 | /* Continue running the machine */ |
dfef8367 PP |
1530 | BT_LOGV_STR("Running the state machine."); |
1531 | ||
e98a2d6e PP |
1532 | while (true) { |
1533 | *status = handle_state(btr); | |
50842bdc | 1534 | if (*status != BT_BTR_STATUS_OK || |
fdf0e7a0 | 1535 | btr->state == BTR_STATE_DONE) { |
e98a2d6e PP |
1536 | break; |
1537 | } | |
1538 | } | |
1539 | ||
1540 | /* Update packet offset for next time */ | |
dfef8367 | 1541 | update_packet_offset(btr); |
e98a2d6e PP |
1542 | return btr->buf.at; |
1543 | } |