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81447b5b PP |
1 | # The MIT License (MIT) |
2 | # | |
f6a5e476 | 3 | # Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com> |
81447b5b PP |
4 | # |
5 | # Permission is hereby granted, free of charge, to any person obtaining a copy | |
6 | # of this software and associated documentation files (the "Software"), to deal | |
7 | # in the Software without restriction, including without limitation the rights | |
8 | # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
9 | # copies of the Software, and to permit persons to whom the Software is | |
10 | # furnished to do so, subject to the following conditions: | |
11 | # | |
12 | # The above copyright notice and this permission notice shall be included in | |
13 | # all copies or substantial portions of the Software. | |
14 | # | |
15 | # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
21 | # THE SOFTWARE. | |
22 | ||
23 | from bt2 import native_bt, object, utils | |
24 | import bt2.field_types | |
25 | import collections.abc | |
26 | import functools | |
27 | import numbers | |
28 | import math | |
29 | import abc | |
30 | import bt2 | |
31 | ||
32 | ||
80d037bc JG |
33 | def _get_leaf_field(obj): |
34 | if type(obj) is not _VariantField: | |
35 | return obj | |
36 | ||
37 | return _get_leaf_field(obj.selected_field) | |
38 | ||
39 | ||
81447b5b PP |
40 | def _create_from_ptr(ptr): |
41 | # recreate the field type wrapper of this field's type (the identity | |
42 | # could be different, but the underlying address should be the | |
43 | # same) | |
44 | field_type_ptr = native_bt.ctf_field_get_type(ptr) | |
45 | utils._handle_ptr(field_type_ptr, "cannot get field object's type") | |
46 | field_type = bt2.field_types._create_from_ptr(field_type_ptr) | |
47 | typeid = native_bt.ctf_field_type_get_type_id(field_type._ptr) | |
48 | field = _TYPE_ID_TO_OBJ[typeid]._create_from_ptr(ptr) | |
49 | field._field_type = field_type | |
50 | return field | |
51 | ||
52 | ||
53 | class _Field(object._Object, metaclass=abc.ABCMeta): | |
54 | def __copy__(self): | |
55 | ptr = native_bt.ctf_field_copy(self._ptr) | |
56 | utils._handle_ptr(ptr, 'cannot copy {} field object'.format(self._NAME.lower())) | |
57 | return _create_from_ptr(ptr) | |
58 | ||
59 | def __deepcopy__(self, memo): | |
60 | cpy = self.__copy__() | |
61 | memo[id(self)] = cpy | |
62 | return cpy | |
63 | ||
80d037bc JG |
64 | def __eq__(self, other): |
65 | # special case: two unset fields with the same field type are equal | |
66 | if isinstance(other, _Field): | |
67 | if not self.is_set or not other.is_set: | |
68 | if not self.is_set and not other.is_set and self.field_type == other.field_type: | |
69 | return True | |
70 | return False | |
71 | ||
72 | other = _get_leaf_field(other) | |
73 | return self._spec_eq(other) | |
74 | ||
81447b5b PP |
75 | @property |
76 | def field_type(self): | |
77 | return self._field_type | |
78 | ||
253a8c0d JG |
79 | @property |
80 | def is_set(self): | |
53d65c1d | 81 | is_set = native_bt.ctf_field_is_set(self._ptr) |
253a8c0d JG |
82 | return is_set > 0 |
83 | ||
84 | def reset(self): | |
53d65c1d | 85 | ret = native_bt.ctf_field_reset(self._ptr) |
253a8c0d JG |
86 | utils._handle_ret(ret, "cannot reset field object's value") |
87 | ||
81447b5b PP |
88 | |
89 | @functools.total_ordering | |
90 | class _NumericField(_Field): | |
91 | @staticmethod | |
92 | def _extract_value(other): | |
93 | if other is True or other is False: | |
94 | return other | |
95 | ||
96 | if isinstance(other, numbers.Integral): | |
97 | return int(other) | |
98 | ||
99 | if isinstance(other, numbers.Real): | |
100 | return float(other) | |
101 | ||
102 | if isinstance(other, numbers.Complex): | |
103 | return complex(other) | |
104 | ||
105 | raise TypeError("'{}' object is not a number object".format(other.__class__.__name__)) | |
106 | ||
107 | def __int__(self): | |
80d037bc | 108 | return int(self._value) |
81447b5b PP |
109 | |
110 | def __float__(self): | |
80d037bc | 111 | return float(self._value) |
81447b5b PP |
112 | |
113 | def __str__(self): | |
80d037bc | 114 | return str(self._value) |
81447b5b PP |
115 | |
116 | def __lt__(self, other): | |
117 | if not isinstance(other, numbers.Number): | |
118 | raise TypeError('unorderable types: {}() < {}()'.format(self.__class__.__name__, | |
119 | other.__class__.__name__)) | |
120 | ||
80d037bc | 121 | return self._value < float(other) |
81447b5b PP |
122 | |
123 | def __le__(self, other): | |
124 | if not isinstance(other, numbers.Number): | |
125 | raise TypeError('unorderable types: {}() <= {}()'.format(self.__class__.__name__, | |
126 | other.__class__.__name__)) | |
127 | ||
80d037bc | 128 | return self._value <= float(other) |
81447b5b | 129 | |
80d037bc | 130 | def _spec_eq(self, other): |
81447b5b PP |
131 | if not isinstance(other, numbers.Number): |
132 | return False | |
133 | ||
80d037bc | 134 | return self._value == complex(other) |
81447b5b PP |
135 | |
136 | def __rmod__(self, other): | |
80d037bc | 137 | return self._extract_value(other) % self._value |
81447b5b PP |
138 | |
139 | def __mod__(self, other): | |
80d037bc | 140 | return self._value % self._extract_value(other) |
81447b5b PP |
141 | |
142 | def __rfloordiv__(self, other): | |
80d037bc | 143 | return self._extract_value(other) // self._value |
81447b5b PP |
144 | |
145 | def __floordiv__(self, other): | |
80d037bc | 146 | return self._value // self._extract_value(other) |
81447b5b PP |
147 | |
148 | def __round__(self, ndigits=None): | |
149 | if ndigits is None: | |
80d037bc | 150 | return round(self._value) |
81447b5b | 151 | else: |
80d037bc | 152 | return round(self._value, ndigits) |
81447b5b PP |
153 | |
154 | def __ceil__(self): | |
80d037bc | 155 | return math.ceil(self._value) |
81447b5b PP |
156 | |
157 | def __floor__(self): | |
80d037bc | 158 | return math.floor(self._value) |
81447b5b PP |
159 | |
160 | def __trunc__(self): | |
80d037bc | 161 | return int(self._value) |
81447b5b PP |
162 | |
163 | def __abs__(self): | |
80d037bc | 164 | return abs(self._value) |
81447b5b PP |
165 | |
166 | def __add__(self, other): | |
80d037bc | 167 | return self._value + self._extract_value(other) |
81447b5b PP |
168 | |
169 | def __radd__(self, other): | |
170 | return self.__add__(other) | |
171 | ||
172 | def __neg__(self): | |
80d037bc | 173 | return -self._value |
81447b5b PP |
174 | |
175 | def __pos__(self): | |
80d037bc | 176 | return +self._value |
81447b5b PP |
177 | |
178 | def __mul__(self, other): | |
80d037bc | 179 | return self._value * self._extract_value(other) |
81447b5b PP |
180 | |
181 | def __rmul__(self, other): | |
182 | return self.__mul__(other) | |
183 | ||
184 | def __truediv__(self, other): | |
80d037bc | 185 | return self._value / self._extract_value(other) |
81447b5b PP |
186 | |
187 | def __rtruediv__(self, other): | |
80d037bc | 188 | return self._extract_value(other) / self._value |
81447b5b PP |
189 | |
190 | def __pow__(self, exponent): | |
80d037bc | 191 | return self._value ** self._extract_value(exponent) |
81447b5b PP |
192 | |
193 | def __rpow__(self, base): | |
80d037bc | 194 | return self._extract_value(base) ** self._value |
81447b5b PP |
195 | |
196 | def __iadd__(self, other): | |
197 | self.value = self + other | |
198 | return self | |
199 | ||
200 | def __isub__(self, other): | |
201 | self.value = self - other | |
202 | return self | |
203 | ||
204 | def __imul__(self, other): | |
205 | self.value = self * other | |
206 | return self | |
207 | ||
208 | def __itruediv__(self, other): | |
209 | self.value = self / other | |
210 | return self | |
211 | ||
212 | def __ifloordiv__(self, other): | |
213 | self.value = self // other | |
214 | return self | |
215 | ||
216 | def __imod__(self, other): | |
217 | self.value = self % other | |
218 | return self | |
219 | ||
220 | def __ipow__(self, other): | |
221 | self.value = self ** other | |
222 | return self | |
223 | ||
224 | ||
225 | class _IntegralField(_NumericField, numbers.Integral): | |
226 | def __lshift__(self, other): | |
80d037bc | 227 | return self._value << self._extract_value(other) |
81447b5b PP |
228 | |
229 | def __rlshift__(self, other): | |
80d037bc | 230 | return self._extract_value(other) << self._value |
81447b5b PP |
231 | |
232 | def __rshift__(self, other): | |
80d037bc | 233 | return self._value >> self._extract_value(other) |
81447b5b PP |
234 | |
235 | def __rrshift__(self, other): | |
80d037bc | 236 | return self._extract_value(other) >> self._value |
81447b5b PP |
237 | |
238 | def __and__(self, other): | |
80d037bc | 239 | return self._value & self._extract_value(other) |
81447b5b PP |
240 | |
241 | def __rand__(self, other): | |
80d037bc | 242 | return self._extract_value(other) & self._value |
81447b5b PP |
243 | |
244 | def __xor__(self, other): | |
80d037bc | 245 | return self._value ^ self._extract_value(other) |
81447b5b PP |
246 | |
247 | def __rxor__(self, other): | |
80d037bc | 248 | return self._extract_value(other) ^ self._value |
81447b5b PP |
249 | |
250 | def __or__(self, other): | |
80d037bc | 251 | return self._value | self._extract_value(other) |
81447b5b PP |
252 | |
253 | def __ror__(self, other): | |
80d037bc | 254 | return self._extract_value(other) | self._value |
81447b5b PP |
255 | |
256 | def __invert__(self): | |
80d037bc | 257 | return ~self._value |
81447b5b PP |
258 | |
259 | def __ilshift__(self, other): | |
260 | self.value = self << other | |
261 | return self | |
262 | ||
263 | def __irshift__(self, other): | |
264 | self.value = self >> other | |
265 | return self | |
266 | ||
267 | def __iand__(self, other): | |
268 | self.value = self & other | |
269 | return self | |
270 | ||
271 | def __ixor__(self, other): | |
272 | self.value = self ^ other | |
273 | return self | |
274 | ||
275 | def __ior__(self, other): | |
276 | self.value = self | other | |
277 | return self | |
278 | ||
279 | ||
280 | class _RealField(_NumericField, numbers.Real): | |
281 | pass | |
282 | ||
283 | ||
284 | class _IntegerField(_IntegralField): | |
285 | _NAME = 'Integer' | |
286 | ||
287 | def _value_to_int(self, value): | |
288 | if not isinstance(value, numbers.Real): | |
289 | raise TypeError('expecting a real number object') | |
290 | ||
291 | value = int(value) | |
292 | ||
293 | if self.field_type.is_signed: | |
294 | utils._check_int64(value) | |
295 | else: | |
296 | utils._check_uint64(value) | |
297 | ||
298 | return value | |
299 | ||
300 | @property | |
80d037bc | 301 | def _value(self): |
81447b5b PP |
302 | if self.field_type.is_signed: |
303 | ret, value = native_bt.ctf_field_signed_integer_get_value(self._ptr) | |
304 | else: | |
305 | ret, value = native_bt.ctf_field_unsigned_integer_get_value(self._ptr) | |
306 | ||
f6a5e476 | 307 | if ret < 0: |
80d037bc JG |
308 | if not self.is_set: |
309 | return | |
310 | ||
311 | utils._handle_ret(ret, "cannot get integer field's value") | |
f6a5e476 | 312 | |
81447b5b PP |
313 | return value |
314 | ||
80d037bc | 315 | def _set_value(self, value): |
81447b5b PP |
316 | value = self._value_to_int(value) |
317 | ||
318 | if self.field_type.is_signed: | |
319 | ret = native_bt.ctf_field_signed_integer_set_value(self._ptr, value) | |
320 | else: | |
321 | ret = native_bt.ctf_field_unsigned_integer_set_value(self._ptr, value) | |
322 | ||
323 | utils._handle_ret(ret, "cannot set integer field object's value") | |
324 | ||
80d037bc | 325 | value = property(fset=_set_value) |
81447b5b PP |
326 | |
327 | class _FloatingPointNumberField(_RealField): | |
328 | _NAME = 'Floating point number' | |
329 | ||
330 | def _value_to_float(self, value): | |
331 | if not isinstance(value, numbers.Real): | |
332 | raise TypeError("expecting a real number object") | |
333 | ||
334 | return float(value) | |
335 | ||
336 | @property | |
80d037bc | 337 | def _value(self): |
81447b5b | 338 | ret, value = native_bt.ctf_field_floating_point_get_value(self._ptr) |
f6a5e476 PP |
339 | |
340 | if ret < 0: | |
80d037bc JG |
341 | if not self.is_set: |
342 | return | |
343 | ||
344 | utils._handle_ret(ret, "cannot get floating point number field's value") | |
f6a5e476 | 345 | |
81447b5b PP |
346 | return value |
347 | ||
80d037bc | 348 | def _set_value(self, value): |
81447b5b PP |
349 | value = self._value_to_float(value) |
350 | ret = native_bt.ctf_field_floating_point_set_value(self._ptr, value) | |
351 | utils._handle_ret(ret, "cannot set floating point number field object's value") | |
352 | ||
80d037bc | 353 | value = property(fset=_set_value) |
81447b5b PP |
354 | |
355 | class _EnumerationField(_IntegerField): | |
356 | _NAME = 'Enumeration' | |
357 | ||
358 | @property | |
359 | def integer_field(self): | |
360 | int_field_ptr = native_bt.ctf_field_enumeration_get_container(self._ptr) | |
f6a5e476 | 361 | assert(int_field_ptr) |
81447b5b PP |
362 | return _create_from_ptr(int_field_ptr) |
363 | ||
80d037bc | 364 | def _set_value(self, value): |
81447b5b PP |
365 | self.integer_field.value = value |
366 | ||
80d037bc JG |
367 | value = property(fset=_set_value) |
368 | ||
369 | @property | |
370 | def _value(self): | |
371 | return self.integer_field._value | |
372 | ||
81447b5b PP |
373 | @property |
374 | def mappings(self): | |
f6a5e476 PP |
375 | iter_ptr = native_bt.ctf_field_enumeration_get_mappings(self._ptr) |
376 | assert(iter_ptr) | |
377 | return bt2.field_types._EnumerationFieldTypeMappingIterator(iter_ptr, | |
378 | self.field_type.is_signed) | |
81447b5b PP |
379 | |
380 | ||
381 | @functools.total_ordering | |
382 | class _StringField(_Field, collections.abc.Sequence): | |
383 | _NAME = 'String' | |
384 | ||
385 | def _value_to_str(self, value): | |
386 | if isinstance(value, self.__class__): | |
80d037bc | 387 | value = value._value |
81447b5b PP |
388 | |
389 | if not isinstance(value, str): | |
390 | raise TypeError("expecting a 'str' object") | |
391 | ||
392 | return value | |
393 | ||
394 | @property | |
80d037bc | 395 | def _value(self): |
81447b5b | 396 | value = native_bt.ctf_field_string_get_value(self._ptr) |
81447b5b PP |
397 | return value |
398 | ||
80d037bc | 399 | def _set_value(self, value): |
81447b5b PP |
400 | value = self._value_to_str(value) |
401 | ret = native_bt.ctf_field_string_set_value(self._ptr, value) | |
402 | utils._handle_ret(ret, "cannot set string field object's value") | |
403 | ||
80d037bc JG |
404 | value = property(fset=_set_value) |
405 | ||
406 | def _spec_eq(self, other): | |
81447b5b PP |
407 | try: |
408 | other = self._value_to_str(other) | |
409 | except: | |
410 | return False | |
411 | ||
80d037bc | 412 | return self._value == other |
81447b5b PP |
413 | |
414 | def __le__(self, other): | |
80d037bc | 415 | return self._value <= self._value_to_str(other) |
81447b5b PP |
416 | |
417 | def __lt__(self, other): | |
80d037bc | 418 | return self._value < self._value_to_str(other) |
81447b5b PP |
419 | |
420 | def __bool__(self): | |
80d037bc | 421 | return bool(self._value) |
81447b5b PP |
422 | |
423 | def __str__(self): | |
80d037bc | 424 | return self._value |
81447b5b PP |
425 | |
426 | def __getitem__(self, index): | |
80d037bc | 427 | return self._value[index] |
81447b5b PP |
428 | |
429 | def __len__(self): | |
80d037bc | 430 | return len(self._value) |
81447b5b PP |
431 | |
432 | def __iadd__(self, value): | |
433 | value = self._value_to_str(value) | |
434 | ret = native_bt.ctf_field_string_append(self._ptr, value) | |
435 | utils._handle_ret(ret, "cannot append to string field object's value") | |
436 | return self | |
437 | ||
438 | ||
439 | class _ContainerField(_Field): | |
440 | def __bool__(self): | |
441 | return len(self) != 0 | |
442 | ||
443 | def __len__(self): | |
444 | count = self._count() | |
f6a5e476 | 445 | assert(count >= 0) |
81447b5b PP |
446 | return count |
447 | ||
448 | def __delitem__(self, index): | |
449 | raise NotImplementedError | |
450 | ||
451 | ||
452 | class _StructureField(_ContainerField, collections.abc.MutableMapping): | |
453 | _NAME = 'Structure' | |
454 | ||
455 | def _count(self): | |
456 | return len(self.field_type) | |
457 | ||
458 | def __getitem__(self, key): | |
459 | utils._check_str(key) | |
f6a5e476 | 460 | ptr = native_bt.ctf_field_structure_get_field_by_name(self._ptr, key) |
81447b5b PP |
461 | |
462 | if ptr is None: | |
463 | raise KeyError(key) | |
464 | ||
465 | return _create_from_ptr(ptr) | |
466 | ||
467 | def __setitem__(self, key, value): | |
f987e50a | 468 | # raises if key is somehow invalid |
81447b5b PP |
469 | field = self[key] |
470 | ||
81447b5b PP |
471 | # the field's property does the appropriate conversion or raises |
472 | # the appropriate exception | |
473 | field.value = value | |
474 | ||
475 | def at_index(self, index): | |
476 | utils._check_uint64(index) | |
f6a5e476 PP |
477 | |
478 | if index >= len(self): | |
479 | raise IndexError | |
480 | ||
81447b5b | 481 | field_ptr = native_bt.ctf_field_structure_get_field_by_index(self._ptr, index) |
f6a5e476 | 482 | assert(field_ptr) |
81447b5b PP |
483 | return _create_from_ptr(field_ptr) |
484 | ||
485 | def __iter__(self): | |
486 | # same name iterator | |
487 | return iter(self.field_type) | |
488 | ||
80d037bc JG |
489 | def _spec_eq(self, other): |
490 | try: | |
491 | if len(self) != len(other): | |
81447b5b PP |
492 | return False |
493 | ||
80d037bc JG |
494 | for self_key, self_value in self.items(): |
495 | if self_key not in other: | |
496 | return False | |
81447b5b | 497 | |
80d037bc | 498 | other_value = other[self_key] |
81447b5b | 499 | |
80d037bc JG |
500 | if self_value != other_value: |
501 | return False | |
502 | ||
503 | return True | |
504 | except: | |
505 | return False | |
81447b5b | 506 | |
d5697082 | 507 | @property |
80d037bc JG |
508 | def _value(self): |
509 | return {key: value._value for key, value in self.items()} | |
d5697082 | 510 | |
80d037bc JG |
511 | def _set_value(self, values): |
512 | original_values = self._value | |
d5697082 | 513 | |
80d037bc JG |
514 | try: |
515 | for key, value in values.items(): | |
516 | self[key].value = value | |
517 | except: | |
518 | self.value = original_values | |
519 | raise | |
d5697082 | 520 | |
80d037bc | 521 | value = property(fset=_set_value) |
81447b5b PP |
522 | |
523 | class _VariantField(_Field): | |
524 | _NAME = 'Variant' | |
525 | ||
526 | @property | |
527 | def tag_field(self): | |
528 | field_ptr = native_bt.ctf_field_variant_get_tag(self._ptr) | |
f6a5e476 PP |
529 | |
530 | if field_ptr is None: | |
531 | return | |
532 | ||
81447b5b PP |
533 | return _create_from_ptr(field_ptr) |
534 | ||
535 | @property | |
536 | def selected_field(self): | |
537 | return self.field() | |
538 | ||
539 | def field(self, tag_field=None): | |
540 | if tag_field is None: | |
541 | field_ptr = native_bt.ctf_field_variant_get_current_field(self._ptr) | |
f6a5e476 PP |
542 | |
543 | if field_ptr is None: | |
544 | return | |
81447b5b PP |
545 | else: |
546 | utils._check_type(tag_field, _EnumerationField) | |
547 | field_ptr = native_bt.ctf_field_variant_get_field(self._ptr, tag_field._ptr) | |
548 | utils._handle_ptr(field_ptr, "cannot select variant field object's field") | |
549 | ||
550 | return _create_from_ptr(field_ptr) | |
551 | ||
80d037bc JG |
552 | def _spec_eq(self, other): |
553 | return _get_leaf_field(self) == other | |
f6a5e476 PP |
554 | |
555 | def __bool__(self): | |
556 | return bool(self.selected_field) | |
81447b5b | 557 | |
80d037bc JG |
558 | @property |
559 | def _value(self): | |
560 | if self.selected_field is not None: | |
561 | return self.selected_field._value | |
562 | ||
563 | def _set_value(self, value): | |
564 | self.selected_field.value = value | |
565 | ||
566 | value = property(fset=_set_value) | |
81447b5b PP |
567 | |
568 | class _ArraySequenceField(_ContainerField, collections.abc.MutableSequence): | |
569 | def __getitem__(self, index): | |
570 | if not isinstance(index, numbers.Integral): | |
571 | raise TypeError("'{}' is not an integral number object: invalid index".format(index.__class__.__name__)) | |
572 | ||
573 | index = int(index) | |
574 | ||
575 | if index < 0 or index >= len(self): | |
576 | raise IndexError('{} field object index is out of range'.format(self._NAME)) | |
577 | ||
578 | field_ptr = self._get_field_ptr_at_index(index) | |
f6a5e476 | 579 | assert(field_ptr) |
81447b5b PP |
580 | return _create_from_ptr(field_ptr) |
581 | ||
582 | def __setitem__(self, index, value): | |
583 | # we can only set numbers and strings | |
584 | if not isinstance(value, (numbers.Number, _StringField, str)): | |
585 | raise TypeError('expecting number or string object') | |
586 | ||
587 | # raises if index is somehow invalid | |
588 | field = self[index] | |
589 | ||
590 | if not isinstance(field, (_NumericField, _StringField)): | |
591 | raise TypeError('can only set the value of a number or string field') | |
592 | ||
593 | # the field's property does the appropriate conversion or raises | |
594 | # the appropriate exception | |
595 | field.value = value | |
596 | ||
597 | def insert(self, index, value): | |
598 | raise NotImplementedError | |
599 | ||
80d037bc JG |
600 | def _spec_eq(self, other): |
601 | try: | |
602 | if len(self) != len(other): | |
81447b5b PP |
603 | return False |
604 | ||
80d037bc JG |
605 | for self_field, other_field in zip(self, other): |
606 | if self_field != other_field: | |
607 | return False | |
d5697082 | 608 | |
80d037bc JG |
609 | return True |
610 | except: | |
611 | return False | |
d5697082 | 612 | |
80d037bc JG |
613 | @property |
614 | def _value(self): | |
615 | return [field._value for field in self] | |
d5697082 | 616 | |
81447b5b PP |
617 | |
618 | class _ArrayField(_ArraySequenceField): | |
619 | _NAME = 'Array' | |
620 | ||
621 | def _count(self): | |
622 | return self.field_type.length | |
623 | ||
624 | def _get_field_ptr_at_index(self, index): | |
625 | return native_bt.ctf_field_array_get_field(self._ptr, index) | |
626 | ||
80d037bc JG |
627 | def _set_value(self, values): |
628 | if len(self) != len(values): | |
629 | raise ValueError( | |
630 | 'expected length of value and array field to match') | |
631 | ||
632 | original_values = self._value | |
633 | try: | |
634 | for index, value in enumerate(values): | |
635 | if value is not None: | |
636 | self[index].value = value | |
637 | else: | |
638 | self[index].reset() | |
639 | except: | |
640 | self.value = original_values | |
641 | raise | |
642 | ||
643 | value = property(fset=_set_value) | |
644 | ||
81447b5b PP |
645 | |
646 | class _SequenceField(_ArraySequenceField): | |
647 | _NAME = 'Sequence' | |
648 | ||
649 | def _count(self): | |
7b6af2b9 | 650 | return int(self.length_field) |
81447b5b PP |
651 | |
652 | @property | |
653 | def length_field(self): | |
654 | field_ptr = native_bt.ctf_field_sequence_get_length(self._ptr) | |
7b6af2b9 JG |
655 | if field_ptr is None: |
656 | return | |
81447b5b PP |
657 | return _create_from_ptr(field_ptr) |
658 | ||
659 | @length_field.setter | |
660 | def length_field(self, length_field): | |
661 | utils._check_type(length_field, _IntegerField) | |
662 | ret = native_bt.ctf_field_sequence_set_length(self._ptr, length_field._ptr) | |
663 | utils._handle_ret(ret, "cannot set sequence field object's length field") | |
664 | ||
665 | def _get_field_ptr_at_index(self, index): | |
666 | return native_bt.ctf_field_sequence_get_field(self._ptr, index) | |
667 | ||
80d037bc JG |
668 | def _set_value(self, values): |
669 | original_length_field = self.length_field | |
670 | if original_length_field is not None: | |
671 | original_values = self._value | |
672 | ||
673 | if len(values) != self.length_field: | |
674 | if self.length_field is not None: | |
675 | length_ft = self.length_field.field_type | |
676 | else: | |
677 | length_ft = bt2.IntegerFieldType(size=64, is_signed=False) | |
678 | self.length_field = length_ft(len(values)) | |
679 | ||
680 | try: | |
681 | for index, value in enumerate(values): | |
682 | if value is not None: | |
683 | self[index].value = value | |
684 | else: | |
685 | self[index].reset() | |
686 | except: | |
687 | if original_length_field is not None: | |
688 | self.length_field = original_length_field | |
689 | self.value = original_values | |
690 | else: | |
691 | self.reset() | |
692 | raise | |
693 | ||
694 | value = property(fset=_set_value) | |
81447b5b PP |
695 | |
696 | _TYPE_ID_TO_OBJ = { | |
f6a5e476 PP |
697 | native_bt.CTF_FIELD_TYPE_ID_INTEGER: _IntegerField, |
698 | native_bt.CTF_FIELD_TYPE_ID_FLOAT: _FloatingPointNumberField, | |
699 | native_bt.CTF_FIELD_TYPE_ID_ENUM: _EnumerationField, | |
700 | native_bt.CTF_FIELD_TYPE_ID_STRING: _StringField, | |
701 | native_bt.CTF_FIELD_TYPE_ID_STRUCT: _StructureField, | |
702 | native_bt.CTF_FIELD_TYPE_ID_ARRAY: _ArrayField, | |
703 | native_bt.CTF_FIELD_TYPE_ID_SEQUENCE: _SequenceField, | |
704 | native_bt.CTF_FIELD_TYPE_ID_VARIANT: _VariantField, | |
81447b5b | 705 | } |