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81447b5b PP |
1 | # The MIT License (MIT) |
2 | # | |
811644b8 | 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 | ||
e1c6bebd 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) | |
50842bdc | 44 | field_type_ptr = native_bt.field_get_type(ptr) |
81447b5b PP |
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) | |
50842bdc | 47 | typeid = native_bt.field_type_get_type_id(field_type._ptr) |
81447b5b PP |
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): | |
50842bdc | 55 | ptr = native_bt.field_copy(self._ptr) |
81447b5b PP |
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 | ||
e1c6bebd 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 | ||
742e4747 JG |
79 | @property |
80 | def is_set(self): | |
50842bdc | 81 | is_set = native_bt.field_is_set(self._ptr) |
742e4747 JG |
82 | return is_set > 0 |
83 | ||
84 | def reset(self): | |
50842bdc | 85 | ret = native_bt.field_reset(self._ptr) |
742e4747 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): | |
e1c6bebd | 108 | return int(self._value) |
81447b5b PP |
109 | |
110 | def __float__(self): | |
e1c6bebd | 111 | return float(self._value) |
81447b5b PP |
112 | |
113 | def __str__(self): | |
e1c6bebd | 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 | ||
e1c6bebd | 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 | ||
e1c6bebd | 128 | return self._value <= float(other) |
81447b5b | 129 | |
e1c6bebd | 130 | def _spec_eq(self, other): |
81447b5b PP |
131 | if not isinstance(other, numbers.Number): |
132 | return False | |
133 | ||
e1c6bebd | 134 | return self._value == complex(other) |
81447b5b PP |
135 | |
136 | def __rmod__(self, other): | |
e1c6bebd | 137 | return self._extract_value(other) % self._value |
81447b5b PP |
138 | |
139 | def __mod__(self, other): | |
e1c6bebd | 140 | return self._value % self._extract_value(other) |
81447b5b PP |
141 | |
142 | def __rfloordiv__(self, other): | |
e1c6bebd | 143 | return self._extract_value(other) // self._value |
81447b5b PP |
144 | |
145 | def __floordiv__(self, other): | |
e1c6bebd | 146 | return self._value // self._extract_value(other) |
81447b5b PP |
147 | |
148 | def __round__(self, ndigits=None): | |
149 | if ndigits is None: | |
e1c6bebd | 150 | return round(self._value) |
81447b5b | 151 | else: |
e1c6bebd | 152 | return round(self._value, ndigits) |
81447b5b PP |
153 | |
154 | def __ceil__(self): | |
e1c6bebd | 155 | return math.ceil(self._value) |
81447b5b PP |
156 | |
157 | def __floor__(self): | |
e1c6bebd | 158 | return math.floor(self._value) |
81447b5b PP |
159 | |
160 | def __trunc__(self): | |
e1c6bebd | 161 | return int(self._value) |
81447b5b PP |
162 | |
163 | def __abs__(self): | |
e1c6bebd | 164 | return abs(self._value) |
81447b5b PP |
165 | |
166 | def __add__(self, other): | |
e1c6bebd | 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): | |
e1c6bebd | 173 | return -self._value |
81447b5b PP |
174 | |
175 | def __pos__(self): | |
e1c6bebd | 176 | return +self._value |
81447b5b PP |
177 | |
178 | def __mul__(self, other): | |
e1c6bebd | 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): | |
e1c6bebd | 185 | return self._value / self._extract_value(other) |
81447b5b PP |
186 | |
187 | def __rtruediv__(self, other): | |
e1c6bebd | 188 | return self._extract_value(other) / self._value |
81447b5b PP |
189 | |
190 | def __pow__(self, exponent): | |
e1c6bebd | 191 | return self._value ** self._extract_value(exponent) |
81447b5b PP |
192 | |
193 | def __rpow__(self, base): | |
e1c6bebd | 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): | |
e1c6bebd | 227 | return self._value << self._extract_value(other) |
81447b5b PP |
228 | |
229 | def __rlshift__(self, other): | |
e1c6bebd | 230 | return self._extract_value(other) << self._value |
81447b5b PP |
231 | |
232 | def __rshift__(self, other): | |
e1c6bebd | 233 | return self._value >> self._extract_value(other) |
81447b5b PP |
234 | |
235 | def __rrshift__(self, other): | |
e1c6bebd | 236 | return self._extract_value(other) >> self._value |
81447b5b PP |
237 | |
238 | def __and__(self, other): | |
e1c6bebd | 239 | return self._value & self._extract_value(other) |
81447b5b PP |
240 | |
241 | def __rand__(self, other): | |
e1c6bebd | 242 | return self._extract_value(other) & self._value |
81447b5b PP |
243 | |
244 | def __xor__(self, other): | |
e1c6bebd | 245 | return self._value ^ self._extract_value(other) |
81447b5b PP |
246 | |
247 | def __rxor__(self, other): | |
e1c6bebd | 248 | return self._extract_value(other) ^ self._value |
81447b5b PP |
249 | |
250 | def __or__(self, other): | |
e1c6bebd | 251 | return self._value | self._extract_value(other) |
81447b5b PP |
252 | |
253 | def __ror__(self, other): | |
e1c6bebd | 254 | return self._extract_value(other) | self._value |
81447b5b PP |
255 | |
256 | def __invert__(self): | |
e1c6bebd | 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 | |
e1c6bebd | 301 | def _value(self): |
81447b5b | 302 | if self.field_type.is_signed: |
50842bdc | 303 | ret, value = native_bt.field_signed_integer_get_value(self._ptr) |
81447b5b | 304 | else: |
50842bdc | 305 | ret, value = native_bt.field_unsigned_integer_get_value(self._ptr) |
81447b5b | 306 | |
811644b8 | 307 | if ret < 0: |
e1c6bebd JG |
308 | if not self.is_set: |
309 | return | |
310 | ||
311 | utils._handle_ret(ret, "cannot get integer field's value") | |
811644b8 | 312 | |
81447b5b PP |
313 | return value |
314 | ||
e1c6bebd | 315 | def _set_value(self, value): |
81447b5b PP |
316 | value = self._value_to_int(value) |
317 | ||
318 | if self.field_type.is_signed: | |
50842bdc | 319 | ret = native_bt.field_signed_integer_set_value(self._ptr, value) |
81447b5b | 320 | else: |
50842bdc | 321 | ret = native_bt.field_unsigned_integer_set_value(self._ptr, value) |
81447b5b PP |
322 | |
323 | utils._handle_ret(ret, "cannot set integer field object's value") | |
324 | ||
e1c6bebd | 325 | value = property(fset=_set_value) |
81447b5b | 326 | |
0b03f63e | 327 | |
81447b5b PP |
328 | class _FloatingPointNumberField(_RealField): |
329 | _NAME = 'Floating point number' | |
330 | ||
331 | def _value_to_float(self, value): | |
332 | if not isinstance(value, numbers.Real): | |
333 | raise TypeError("expecting a real number object") | |
334 | ||
335 | return float(value) | |
336 | ||
337 | @property | |
e1c6bebd | 338 | def _value(self): |
50842bdc | 339 | ret, value = native_bt.field_floating_point_get_value(self._ptr) |
811644b8 PP |
340 | |
341 | if ret < 0: | |
e1c6bebd JG |
342 | if not self.is_set: |
343 | return | |
344 | ||
345 | utils._handle_ret(ret, "cannot get floating point number field's value") | |
811644b8 | 346 | |
81447b5b PP |
347 | return value |
348 | ||
e1c6bebd | 349 | def _set_value(self, value): |
81447b5b | 350 | value = self._value_to_float(value) |
50842bdc | 351 | ret = native_bt.field_floating_point_set_value(self._ptr, value) |
81447b5b PP |
352 | utils._handle_ret(ret, "cannot set floating point number field object's value") |
353 | ||
e1c6bebd | 354 | value = property(fset=_set_value) |
81447b5b | 355 | |
0b03f63e | 356 | |
81447b5b PP |
357 | class _EnumerationField(_IntegerField): |
358 | _NAME = 'Enumeration' | |
359 | ||
360 | @property | |
361 | def integer_field(self): | |
50842bdc | 362 | int_field_ptr = native_bt.field_enumeration_get_container(self._ptr) |
811644b8 | 363 | assert(int_field_ptr) |
81447b5b PP |
364 | return _create_from_ptr(int_field_ptr) |
365 | ||
e1c6bebd | 366 | def _set_value(self, value): |
81447b5b PP |
367 | self.integer_field.value = value |
368 | ||
4addd228 JG |
369 | def __repr__(self): |
370 | labels = [repr(v.name) for v in self.mappings] | |
371 | return '{} ({})'.format(self._value, ', '.join(labels)) | |
372 | ||
e1c6bebd JG |
373 | value = property(fset=_set_value) |
374 | ||
375 | @property | |
376 | def _value(self): | |
377 | return self.integer_field._value | |
378 | ||
81447b5b PP |
379 | @property |
380 | def mappings(self): | |
50842bdc | 381 | iter_ptr = native_bt.field_enumeration_get_mappings(self._ptr) |
811644b8 PP |
382 | assert(iter_ptr) |
383 | return bt2.field_types._EnumerationFieldTypeMappingIterator(iter_ptr, | |
384 | self.field_type.is_signed) | |
81447b5b PP |
385 | |
386 | ||
387 | @functools.total_ordering | |
388 | class _StringField(_Field, collections.abc.Sequence): | |
389 | _NAME = 'String' | |
390 | ||
391 | def _value_to_str(self, value): | |
392 | if isinstance(value, self.__class__): | |
e1c6bebd | 393 | value = value._value |
81447b5b PP |
394 | |
395 | if not isinstance(value, str): | |
396 | raise TypeError("expecting a 'str' object") | |
397 | ||
398 | return value | |
399 | ||
400 | @property | |
e1c6bebd | 401 | def _value(self): |
50842bdc | 402 | value = native_bt.field_string_get_value(self._ptr) |
81447b5b PP |
403 | return value |
404 | ||
e1c6bebd | 405 | def _set_value(self, value): |
81447b5b | 406 | value = self._value_to_str(value) |
50842bdc | 407 | ret = native_bt.field_string_set_value(self._ptr, value) |
81447b5b PP |
408 | utils._handle_ret(ret, "cannot set string field object's value") |
409 | ||
e1c6bebd JG |
410 | value = property(fset=_set_value) |
411 | ||
412 | def _spec_eq(self, other): | |
81447b5b PP |
413 | try: |
414 | other = self._value_to_str(other) | |
415 | except: | |
416 | return False | |
417 | ||
e1c6bebd | 418 | return self._value == other |
81447b5b PP |
419 | |
420 | def __le__(self, other): | |
e1c6bebd | 421 | return self._value <= self._value_to_str(other) |
81447b5b PP |
422 | |
423 | def __lt__(self, other): | |
e1c6bebd | 424 | return self._value < self._value_to_str(other) |
81447b5b PP |
425 | |
426 | def __bool__(self): | |
e1c6bebd | 427 | return bool(self._value) |
81447b5b PP |
428 | |
429 | def __str__(self): | |
e1c6bebd | 430 | return self._value |
81447b5b PP |
431 | |
432 | def __getitem__(self, index): | |
e1c6bebd | 433 | return self._value[index] |
81447b5b PP |
434 | |
435 | def __len__(self): | |
e1c6bebd | 436 | return len(self._value) |
81447b5b PP |
437 | |
438 | def __iadd__(self, value): | |
439 | value = self._value_to_str(value) | |
50842bdc | 440 | ret = native_bt.field_string_append(self._ptr, value) |
81447b5b PP |
441 | utils._handle_ret(ret, "cannot append to string field object's value") |
442 | return self | |
443 | ||
444 | ||
445 | class _ContainerField(_Field): | |
446 | def __bool__(self): | |
447 | return len(self) != 0 | |
448 | ||
449 | def __len__(self): | |
450 | count = self._count() | |
811644b8 | 451 | assert(count >= 0) |
81447b5b PP |
452 | return count |
453 | ||
454 | def __delitem__(self, index): | |
455 | raise NotImplementedError | |
456 | ||
457 | ||
458 | class _StructureField(_ContainerField, collections.abc.MutableMapping): | |
459 | _NAME = 'Structure' | |
460 | ||
461 | def _count(self): | |
462 | return len(self.field_type) | |
463 | ||
464 | def __getitem__(self, key): | |
465 | utils._check_str(key) | |
50842bdc | 466 | ptr = native_bt.field_structure_get_field_by_name(self._ptr, key) |
81447b5b PP |
467 | |
468 | if ptr is None: | |
469 | raise KeyError(key) | |
470 | ||
471 | return _create_from_ptr(ptr) | |
472 | ||
473 | def __setitem__(self, key, value): | |
236355c2 | 474 | # raises if key is somehow invalid |
81447b5b PP |
475 | field = self[key] |
476 | ||
81447b5b PP |
477 | # the field's property does the appropriate conversion or raises |
478 | # the appropriate exception | |
479 | field.value = value | |
480 | ||
481 | def at_index(self, index): | |
482 | utils._check_uint64(index) | |
811644b8 PP |
483 | |
484 | if index >= len(self): | |
485 | raise IndexError | |
486 | ||
50842bdc | 487 | field_ptr = native_bt.field_structure_get_field_by_index(self._ptr, index) |
811644b8 | 488 | assert(field_ptr) |
81447b5b PP |
489 | return _create_from_ptr(field_ptr) |
490 | ||
491 | def __iter__(self): | |
492 | # same name iterator | |
493 | return iter(self.field_type) | |
494 | ||
e1c6bebd JG |
495 | def _spec_eq(self, other): |
496 | try: | |
497 | if len(self) != len(other): | |
81447b5b PP |
498 | return False |
499 | ||
e1c6bebd JG |
500 | for self_key, self_value in self.items(): |
501 | if self_key not in other: | |
502 | return False | |
81447b5b | 503 | |
e1c6bebd | 504 | other_value = other[self_key] |
81447b5b | 505 | |
e1c6bebd JG |
506 | if self_value != other_value: |
507 | return False | |
508 | ||
509 | return True | |
510 | except: | |
511 | return False | |
81447b5b | 512 | |
7c54e2e7 | 513 | @property |
e1c6bebd JG |
514 | def _value(self): |
515 | return {key: value._value for key, value in self.items()} | |
7c54e2e7 | 516 | |
e1c6bebd JG |
517 | def _set_value(self, values): |
518 | original_values = self._value | |
7c54e2e7 | 519 | |
e1c6bebd JG |
520 | try: |
521 | for key, value in values.items(): | |
522 | self[key].value = value | |
523 | except: | |
524 | self.value = original_values | |
525 | raise | |
7c54e2e7 | 526 | |
e1c6bebd | 527 | value = property(fset=_set_value) |
81447b5b | 528 | |
ac7e2dc6 JG |
529 | def __repr__(self): |
530 | items = ['{}: {}'.format(repr(k), repr(v)) for k, v in self.items()] | |
531 | return '{{{}}}'.format(', '.join(items)) | |
532 | ||
0b03f63e | 533 | |
81447b5b PP |
534 | class _VariantField(_Field): |
535 | _NAME = 'Variant' | |
536 | ||
537 | @property | |
538 | def tag_field(self): | |
50842bdc | 539 | field_ptr = native_bt.field_variant_get_tag(self._ptr) |
811644b8 PP |
540 | |
541 | if field_ptr is None: | |
542 | return | |
543 | ||
81447b5b PP |
544 | return _create_from_ptr(field_ptr) |
545 | ||
546 | @property | |
547 | def selected_field(self): | |
548 | return self.field() | |
549 | ||
550 | def field(self, tag_field=None): | |
551 | if tag_field is None: | |
50842bdc | 552 | field_ptr = native_bt.field_variant_get_current_field(self._ptr) |
811644b8 PP |
553 | |
554 | if field_ptr is None: | |
555 | return | |
81447b5b PP |
556 | else: |
557 | utils._check_type(tag_field, _EnumerationField) | |
50842bdc | 558 | field_ptr = native_bt.field_variant_get_field(self._ptr, tag_field._ptr) |
81447b5b PP |
559 | utils._handle_ptr(field_ptr, "cannot select variant field object's field") |
560 | ||
561 | return _create_from_ptr(field_ptr) | |
562 | ||
e1c6bebd JG |
563 | def _spec_eq(self, other): |
564 | return _get_leaf_field(self) == other | |
811644b8 PP |
565 | |
566 | def __bool__(self): | |
567 | return bool(self.selected_field) | |
81447b5b | 568 | |
872eeccb JG |
569 | def __repr__(self): |
570 | return repr(self._value) | |
571 | ||
e1c6bebd JG |
572 | @property |
573 | def _value(self): | |
574 | if self.selected_field is not None: | |
575 | return self.selected_field._value | |
576 | ||
577 | def _set_value(self, value): | |
578 | self.selected_field.value = value | |
579 | ||
580 | value = property(fset=_set_value) | |
81447b5b | 581 | |
0b03f63e | 582 | |
81447b5b PP |
583 | class _ArraySequenceField(_ContainerField, collections.abc.MutableSequence): |
584 | def __getitem__(self, index): | |
585 | if not isinstance(index, numbers.Integral): | |
586 | raise TypeError("'{}' is not an integral number object: invalid index".format(index.__class__.__name__)) | |
587 | ||
588 | index = int(index) | |
589 | ||
590 | if index < 0 or index >= len(self): | |
591 | raise IndexError('{} field object index is out of range'.format(self._NAME)) | |
592 | ||
593 | field_ptr = self._get_field_ptr_at_index(index) | |
811644b8 | 594 | assert(field_ptr) |
81447b5b PP |
595 | return _create_from_ptr(field_ptr) |
596 | ||
597 | def __setitem__(self, index, value): | |
598 | # we can only set numbers and strings | |
599 | if not isinstance(value, (numbers.Number, _StringField, str)): | |
600 | raise TypeError('expecting number or string object') | |
601 | ||
602 | # raises if index is somehow invalid | |
603 | field = self[index] | |
604 | ||
605 | if not isinstance(field, (_NumericField, _StringField)): | |
606 | raise TypeError('can only set the value of a number or string field') | |
607 | ||
608 | # the field's property does the appropriate conversion or raises | |
609 | # the appropriate exception | |
610 | field.value = value | |
611 | ||
612 | def insert(self, index, value): | |
613 | raise NotImplementedError | |
614 | ||
e1c6bebd JG |
615 | def _spec_eq(self, other): |
616 | try: | |
617 | if len(self) != len(other): | |
81447b5b PP |
618 | return False |
619 | ||
e1c6bebd JG |
620 | for self_field, other_field in zip(self, other): |
621 | if self_field != other_field: | |
622 | return False | |
7c54e2e7 | 623 | |
e1c6bebd JG |
624 | return True |
625 | except: | |
626 | return False | |
7c54e2e7 | 627 | |
e1c6bebd JG |
628 | @property |
629 | def _value(self): | |
630 | return [field._value for field in self] | |
7c54e2e7 | 631 | |
81447b5b PP |
632 | |
633 | class _ArrayField(_ArraySequenceField): | |
634 | _NAME = 'Array' | |
635 | ||
636 | def _count(self): | |
637 | return self.field_type.length | |
638 | ||
639 | def _get_field_ptr_at_index(self, index): | |
50842bdc | 640 | return native_bt.field_array_get_field(self._ptr, index) |
81447b5b | 641 | |
e1c6bebd JG |
642 | def _set_value(self, values): |
643 | if len(self) != len(values): | |
644 | raise ValueError( | |
645 | 'expected length of value and array field to match') | |
646 | ||
647 | original_values = self._value | |
648 | try: | |
649 | for index, value in enumerate(values): | |
650 | if value is not None: | |
651 | self[index].value = value | |
652 | else: | |
653 | self[index].reset() | |
654 | except: | |
655 | self.value = original_values | |
656 | raise | |
657 | ||
658 | value = property(fset=_set_value) | |
659 | ||
81447b5b PP |
660 | |
661 | class _SequenceField(_ArraySequenceField): | |
662 | _NAME = 'Sequence' | |
663 | ||
664 | def _count(self): | |
a29094be | 665 | return int(self.length_field) |
81447b5b PP |
666 | |
667 | @property | |
668 | def length_field(self): | |
50842bdc | 669 | field_ptr = native_bt.field_sequence_get_length(self._ptr) |
a29094be JG |
670 | if field_ptr is None: |
671 | return | |
81447b5b PP |
672 | return _create_from_ptr(field_ptr) |
673 | ||
674 | @length_field.setter | |
675 | def length_field(self, length_field): | |
676 | utils._check_type(length_field, _IntegerField) | |
50842bdc | 677 | ret = native_bt.field_sequence_set_length(self._ptr, length_field._ptr) |
81447b5b PP |
678 | utils._handle_ret(ret, "cannot set sequence field object's length field") |
679 | ||
680 | def _get_field_ptr_at_index(self, index): | |
50842bdc | 681 | return native_bt.field_sequence_get_field(self._ptr, index) |
81447b5b | 682 | |
e1c6bebd JG |
683 | def _set_value(self, values): |
684 | original_length_field = self.length_field | |
685 | if original_length_field is not None: | |
686 | original_values = self._value | |
687 | ||
688 | if len(values) != self.length_field: | |
689 | if self.length_field is not None: | |
690 | length_ft = self.length_field.field_type | |
691 | else: | |
692 | length_ft = bt2.IntegerFieldType(size=64, is_signed=False) | |
693 | self.length_field = length_ft(len(values)) | |
694 | ||
695 | try: | |
696 | for index, value in enumerate(values): | |
697 | if value is not None: | |
698 | self[index].value = value | |
699 | else: | |
700 | self[index].reset() | |
701 | except: | |
702 | if original_length_field is not None: | |
703 | self.length_field = original_length_field | |
704 | self.value = original_values | |
705 | else: | |
706 | self.reset() | |
707 | raise | |
708 | ||
709 | value = property(fset=_set_value) | |
81447b5b | 710 | |
0b03f63e | 711 | |
81447b5b | 712 | _TYPE_ID_TO_OBJ = { |
50842bdc PP |
713 | native_bt.FIELD_TYPE_ID_INTEGER: _IntegerField, |
714 | native_bt.FIELD_TYPE_ID_FLOAT: _FloatingPointNumberField, | |
715 | native_bt.FIELD_TYPE_ID_ENUM: _EnumerationField, | |
716 | native_bt.FIELD_TYPE_ID_STRING: _StringField, | |
717 | native_bt.FIELD_TYPE_ID_STRUCT: _StructureField, | |
718 | native_bt.FIELD_TYPE_ID_ARRAY: _ArrayField, | |
719 | native_bt.FIELD_TYPE_ID_SEQUENCE: _SequenceField, | |
720 | native_bt.FIELD_TYPE_ID_VARIANT: _VariantField, | |
81447b5b | 721 | } |