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24a3136a DS |
1 | /* |
2 | * babeltrace.i.in | |
3 | * | |
4 | * Babeltrace Python Module interface file | |
5 | * | |
6 | * Copyright 2012 EfficiOS Inc. | |
7 | * | |
8 | * Author: Danny Serres <danny.serres@efficios.com> | |
9 | * | |
10 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
11 | * of this software and associated documentation files (the "Software"), to deal | |
12 | * in the Software without restriction, including without limitation the rights | |
13 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
14 | * copies of the Software, and to permit persons to whom the Software is | |
15 | * furnished to do so, subject to the following conditions: | |
16 | * | |
17 | * The above copyright notice and this permission notice shall be included in | |
18 | * all copies or substantial portions of the Software. | |
19 | */ | |
20 | ||
21 | ||
22 | %define DOCSTRING | |
23 | "BABELTRACE_VERSION_STR | |
24 | ||
25 | Babeltrace is a trace viewer and converter reading and writing the | |
26 | Common Trace Format (CTF). Its main use is to pretty-print CTF | |
27 | traces into a human-readable text output. | |
28 | ||
29 | To use this module, the first step is to create a Context and add a | |
30 | trace to it." | |
31 | %enddef | |
32 | ||
33 | %module(docstring=DOCSTRING) babeltrace | |
34 | ||
35 | %include "typemaps.i" | |
36 | %{ | |
37 | #define SWIG_FILE_WITH_INIT | |
38 | #include <babeltrace/babeltrace.h> | |
39 | #include <babeltrace/babeltrace-internal.h> | |
40 | #include <babeltrace/trace-handle.h> | |
41 | #include <babeltrace/trace-handle-internal.h> | |
42 | #include <babeltrace/context.h> | |
43 | #include <babeltrace/context-internal.h> | |
44 | #include <babeltrace/iterator.h> | |
45 | #include <babeltrace/iterator-internal.h> | |
46 | #include <babeltrace/format.h> | |
47 | #include <babeltrace/list.h> | |
24a3136a DS |
48 | #include <babeltrace/types.h> |
49 | #include <babeltrace/ctf/iterator.h> | |
50 | #include "python-complements.h" | |
51 | %} | |
52 | ||
53 | typedef unsigned long long uint64_t; | |
54 | typedef long long int64_t; | |
55 | typedef int bt_intern_str; | |
56 | ||
57 | /* ================================================================= | |
58 | CONTEXT.H, CONTEXT-INTERNAL.H | |
59 | ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ | |
60 | */ | |
61 | ||
62 | %rename("_bt_context_create") bt_context_create(void); | |
63 | %rename("_bt_context_add_trace") bt_context_add_trace( | |
64 | struct bt_context *ctx, const char *path, const char *format, | |
2c0df204 XH |
65 | void (*packet_seek)(struct bt_stream_pos *pos, size_t index, int whence), |
66 | struct bt_mmap_stream_list *stream_list, FILE *metadata); | |
24a3136a DS |
67 | %rename("_bt_context_remove_trace") bt_context_remove_trace( |
68 | struct bt_context *ctx, int trace_id); | |
69 | %rename("_bt_context_get") bt_context_get(struct bt_context *ctx); | |
70 | %rename("_bt_context_put") bt_context_put(struct bt_context *ctx); | |
71 | %rename("_bt_ctf_event_get_context") bt_ctf_event_get_context( | |
72 | const struct bt_ctf_event *event); | |
73 | ||
74 | struct bt_context *bt_context_create(void); | |
75 | int bt_context_add_trace(struct bt_context *ctx, const char *path, const char *format, | |
2c0df204 XH |
76 | void (*packet_seek)(struct bt_stream_pos *pos, size_t index, int whence), |
77 | struct bt_mmap_stream_list *stream_list, FILE *metadata); | |
24a3136a DS |
78 | void bt_context_remove_trace(struct bt_context *ctx, int trace_id); |
79 | void bt_context_get(struct bt_context *ctx); | |
80 | void bt_context_put(struct bt_context *ctx); | |
81 | struct bt_context *bt_ctf_event_get_context(const struct bt_ctf_event *event); | |
82 | ||
83 | // class Context to prevent direct access to struct bt_context | |
84 | %pythoncode%{ | |
85 | class Context: | |
86 | """ | |
87 | The context represents the object in which a trace_collection is | |
88 | open. As long as this structure is allocated, the trace_collection | |
89 | is open and the traces it contains can be read and seeked by the | |
90 | iterators and callbacks. | |
91 | """ | |
92 | ||
93 | def __init__(self): | |
94 | self._c = _bt_context_create() | |
95 | ||
96 | def __del__(self): | |
97 | _bt_context_put(self._c) | |
98 | ||
99 | def add_trace(self, path, format_str, | |
100 | packet_seek=None, stream_list=None, metadata=None): | |
101 | """ | |
102 | Add a trace by path to the context. | |
103 | ||
104 | Open a trace. | |
105 | ||
106 | path is the path to the trace, it is not recursive. | |
107 | If "path" is None, stream_list is used instead as a list | |
108 | of mmap streams to open for the trace. | |
109 | ||
110 | format is a string containing the format name in which the trace was | |
111 | produced. | |
112 | ||
113 | packet_seek is not implemented for Python. Should be left None to | |
114 | use the default packet_seek handler provided by the trace format. | |
115 | ||
116 | stream_list is a linked list of streams, it is used to open a trace | |
117 | where the trace data is located in memory mapped areas instead of | |
118 | trace files, this argument should be None when path is not None. | |
119 | ||
120 | The metadata parameter acts as a metadata override when not None, | |
121 | otherwise the format handles the metadata opening. | |
122 | ||
123 | Return: the corresponding TraceHandle on success or None on error. | |
124 | """ | |
125 | if metadata is not None: | |
126 | metadata = metadata._file | |
127 | ||
128 | ret = _bt_context_add_trace(self._c, path, format_str, packet_seek, | |
129 | stream_list, metadata) | |
130 | if ret < 0: | |
131 | return None | |
132 | ||
133 | th = TraceHandle.__new__(TraceHandle) | |
134 | th._id = ret | |
135 | return th | |
136 | ||
137 | def add_traces_recursive(self, path, format_str): | |
138 | """ | |
139 | Open a trace recursively. | |
140 | ||
141 | Find each trace present in the subdirectory starting from the given | |
142 | path, and add them to the context. | |
143 | ||
144 | Return a dict of TraceHandle instances (the full path is the key). | |
145 | Return None on error. | |
146 | """ | |
147 | ||
148 | import os | |
149 | ||
150 | trace_handles = {} | |
151 | ||
152 | noTrace = True | |
153 | error = False | |
154 | ||
155 | for fullpath, dirs, files in os.walk(path): | |
156 | if "metadata" in files: | |
157 | trace_handle = self.add_trace(fullpath, format_str) | |
158 | if trace_handle is None: | |
159 | error = True | |
160 | continue | |
161 | ||
162 | trace_handles[fullpath] = trace_handle | |
163 | noTrace = False | |
164 | ||
165 | if noTrace and error: | |
166 | return None | |
167 | return trace_handles | |
168 | ||
169 | def remove_trace(self, trace_handle): | |
170 | """ | |
171 | Remove a trace from the context. | |
172 | Effectively closing the trace. | |
173 | """ | |
174 | try: | |
175 | _bt_context_remove_trace(self._c, trace_handle._id) | |
176 | except AttributeError: | |
177 | raise TypeError("in remove_trace, " | |
178 | "argument 2 must be a TraceHandle instance") | |
179 | %} | |
180 | ||
181 | ||
182 | ||
183 | /* ================================================================= | |
184 | FORMAT.H, REGISTRY | |
185 | ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ | |
186 | */ | |
187 | ||
188 | %rename("lookup_format") bt_lookup_format(bt_intern_str qname); | |
189 | %rename("_bt_print_format_list") bt_fprintf_format_list(FILE *fp); | |
190 | %rename("register_format") bt_register_format(struct format *format); | |
cc26a15a | 191 | %rename("unregister_format") bt_unregister_format(struct bt_format *format); |
24a3136a DS |
192 | |
193 | extern struct format *bt_lookup_format(bt_intern_str qname); | |
194 | extern void bt_fprintf_format_list(FILE *fp); | |
2c0df204 | 195 | extern int bt_register_format(struct bt_format *format); |
cc26a15a | 196 | extern void bt_unregister_format(struct bt_format *format); |
24a3136a | 197 | |
24a3136a DS |
198 | %pythoncode %{ |
199 | ||
200 | def print_format_list(babeltrace_file): | |
201 | """ | |
202 | Print a list of available formats to file. | |
203 | ||
204 | babeltrace_file must be a File instance opened in write mode. | |
205 | """ | |
206 | try: | |
207 | if babeltrace_file._file is not None: | |
208 | _bt_print_format_list(babeltrace_file._file) | |
209 | except AttributeError: | |
210 | raise TypeError("in print_format_list, " | |
211 | "argument 1 must be a File instance") | |
212 | ||
213 | %} | |
214 | ||
215 | ||
216 | /* ================================================================= | |
217 | ITERATOR.H, ITERATOR-INTERNAL.H | |
218 | ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ | |
219 | */ | |
220 | ||
221 | %rename("_bt_iter_create") bt_iter_create(struct bt_context *ctx, | |
222 | const struct bt_iter_pos *begin_pos, const struct bt_iter_pos *end_pos); | |
223 | %rename("_bt_iter_destroy") bt_iter_destroy(struct bt_iter *iter); | |
224 | %rename("_bt_iter_next") bt_iter_next(struct bt_iter *iter); | |
225 | %rename("_bt_iter_get_pos") bt_iter_get_pos(struct bt_iter *iter); | |
226 | %rename("_bt_iter_free_pos") bt_iter_free_pos(struct bt_iter_pos *pos); | |
227 | %rename("_bt_iter_set_pos") bt_iter_set_pos(struct bt_iter *iter, | |
228 | const struct bt_iter_pos *pos); | |
229 | %rename("_bt_iter_create_time_pos") bt_iter_create_time_pos(struct bt_iter *iter, | |
230 | uint64_t timestamp); | |
231 | ||
232 | struct bt_iter *bt_iter_create(struct bt_context *ctx, | |
233 | const struct bt_iter_pos *begin_pos, const struct bt_iter_pos *end_pos); | |
234 | void bt_iter_destroy(struct bt_iter *iter); | |
235 | int bt_iter_next(struct bt_iter *iter); | |
236 | struct bt_iter_pos *bt_iter_get_pos(struct bt_iter *iter); | |
237 | void bt_iter_free_pos(struct bt_iter_pos *pos); | |
238 | int bt_iter_set_pos(struct bt_iter *iter, const struct bt_iter_pos *pos); | |
239 | struct bt_iter_pos *bt_iter_create_time_pos(struct bt_iter *iter, uint64_t timestamp); | |
240 | ||
241 | %rename("_bt_iter_pos") bt_iter_pos; | |
242 | %rename("SEEK_TIME") BT_SEEK_TIME; | |
243 | %rename("SEEK_RESTORE") BT_SEEK_RESTORE; | |
244 | %rename("SEEK_CUR") BT_SEEK_CUR; | |
245 | %rename("SEEK_BEGIN") BT_SEEK_BEGIN; | |
ef42f9eb | 246 | %rename("SEEK_LAST") BT_SEEK_LAST; |
24a3136a DS |
247 | |
248 | // This struct is taken from iterator.h | |
249 | // All changes to the struct must also be made here | |
250 | struct bt_iter_pos { | |
251 | enum { | |
252 | BT_SEEK_TIME, /* uses u.seek_time */ | |
253 | BT_SEEK_RESTORE, /* uses u.restore */ | |
254 | BT_SEEK_CUR, | |
255 | BT_SEEK_BEGIN, | |
ef42f9eb | 256 | BT_SEEK_LAST |
24a3136a DS |
257 | } type; |
258 | union { | |
259 | uint64_t seek_time; | |
260 | struct bt_saved_pos *restore; | |
261 | } u; | |
262 | }; | |
263 | ||
264 | ||
265 | %pythoncode%{ | |
266 | ||
267 | class IterPos: | |
268 | """This class represents the position where to set an iterator.""" | |
269 | ||
270 | __can_access = False | |
271 | ||
272 | def __init__(self, seek_type, seek_time = None): | |
273 | """ | |
274 | seek_type represents the type of seek to use. | |
275 | seek_time is the timestamp to seek to when using SEEK_TIME, it | |
276 | is expressed in nanoseconds | |
277 | Only use SEEK_RESTORE on IterPos obtained from the get_pos function | |
278 | in Iter class. | |
279 | """ | |
280 | ||
281 | self._pos = _bt_iter_pos() | |
282 | self._pos.type = seek_type | |
283 | if seek_time and seek_type == SEEK_TIME: | |
284 | self._pos.u.seek_time = seek_time | |
285 | self.__can_access = True | |
286 | ||
287 | def __del__(self): | |
288 | if not self.__can_access: | |
289 | _bt_iter_free_pos(self._pos) | |
290 | ||
291 | def _get_type(self): | |
292 | if not __can_access: | |
293 | raise AttributeError("seek_type is not available") | |
294 | return self._pos.type | |
295 | ||
296 | def _set_type(self, seek_type): | |
297 | if not __can_access: | |
298 | raise AttributeError("seek_type is not available") | |
299 | self._pos.type = seek_type | |
300 | ||
301 | def _get_time(self): | |
302 | if not __can_access: | |
303 | raise AttributeError("seek_time is not available") | |
304 | ||
305 | elif self._pos.type is not SEEK_TIME: | |
306 | raise TypeError("seek_type is not SEEK_TIME") | |
307 | ||
308 | return self._pos.u.seek_time | |
309 | ||
310 | def _set_time(self, time): | |
311 | if not __can_access: | |
312 | raise AttributeError("seek_time is not available") | |
313 | ||
314 | elif self._pos.type is not SEEK_TIME: | |
315 | raise TypeError("seek_type is not SEEK_TIME") | |
316 | ||
317 | self._pos.u.seek_time = time | |
318 | ||
319 | def _get_pos(self): | |
320 | return self._pos | |
321 | ||
322 | ||
323 | seek_type = property(_get_type, _set_type) | |
324 | seek_time = property(_get_time, _set_time) | |
325 | ||
326 | ||
327 | class Iterator: | |
328 | ||
329 | __with_init = False | |
330 | ||
331 | def __init__(self, context, begin_pos = None, end_pos = None, _no_init = None): | |
332 | """ | |
333 | Allocate a trace collection iterator. | |
334 | ||
335 | begin_pos and end_pos are optional parameters to specify the | |
336 | position at which the trace collection should be seeked upon | |
337 | iterator creation, and the position at which iteration will | |
338 | start returning "EOF". | |
339 | ||
340 | By default, if begin_pos is None, a BT_SEEK_CUR is performed at | |
341 | creation. By default, if end_pos is None, a BT_SEEK_END (end of | |
342 | trace) is the EOF criterion. | |
343 | """ | |
344 | if _no_init is None: | |
345 | if begin_pos is None: | |
346 | bp = None | |
347 | else: | |
348 | try: | |
349 | bp = begin_pos._pos | |
350 | except AttributeError: | |
351 | raise TypeError("in __init__, " | |
352 | "argument 3 must be a IterPos instance") | |
353 | ||
354 | if end_pos is None: | |
355 | ep = None | |
356 | else: | |
357 | try: | |
358 | ep = end_pos._pos | |
359 | except AttributeError: | |
360 | raise TypeError("in __init__, " | |
361 | "argument 4 must be a IterPos instance") | |
362 | ||
363 | try: | |
364 | self._bi = _bt_iter_create(context._c, bp, ep) | |
365 | except AttributeError: | |
366 | raise TypeError("in __init__, " | |
367 | "argument 2 must be a Context instance") | |
368 | ||
369 | self.__with_init = True | |
370 | ||
371 | else: | |
372 | self._bi = _no_init | |
373 | ||
374 | def __del__(self): | |
375 | if self.__with_init: | |
376 | _bt_iter_destroy(self._bi) | |
377 | ||
378 | def next(self): | |
379 | """ | |
380 | Move trace collection position to the next event. | |
381 | Returns 0 on success, a negative value on error. | |
382 | """ | |
383 | return _bt_iter_next(self._bi) | |
384 | ||
385 | def get_pos(self): | |
386 | """Return a IterPos class of the current iterator position.""" | |
387 | ret = IterPos(0) | |
388 | ret.__can_access = False | |
389 | ret._pos = _bt_iter_get_pos(self._bi) | |
390 | return ret | |
391 | ||
392 | def set_pos(self, pos): | |
393 | """ | |
394 | Move the iterator to a given position. | |
395 | ||
396 | On error, the stream_heap is reinitialized and returned empty. | |
397 | Return 0 for success. | |
398 | Return EOF if the position requested is after the last event of the | |
399 | trace collection. | |
400 | Return -EINVAL when called with invalid parameter. | |
401 | Return -ENOMEM if the stream_heap could not be properly initialized. | |
402 | """ | |
403 | try: | |
404 | return _bt_iter_set_pos(self._bi, pos._pos) | |
405 | except AttributeError: | |
406 | raise TypeError("in set_pos, " | |
407 | "argument 2 must be a IterPos instance") | |
408 | ||
409 | def create_time_pos(self, timestamp): | |
410 | """ | |
411 | Create a position based on time | |
412 | This function allocates and returns a new IterPos to be able to | |
413 | restore an iterator position based on a timestamp. | |
414 | """ | |
415 | ||
416 | if timestamp < 0: | |
417 | raise TypeError("timestamp must be an unsigned int") | |
418 | ||
419 | ret = IterPos(0) | |
420 | ret.__can_access = False | |
421 | ret._pos = _bt_iter_create_time_pos(self._bi, timestamp) | |
422 | return ret | |
423 | %} | |
424 | ||
425 | ||
426 | /* ================================================================= | |
427 | CLOCK-TYPE.H | |
428 | ¯¯¯¯¯¯¯¯¯¯¯¯ | |
429 | *** Enum copied from clock-type.h | |
430 | All changes must also be made here | |
431 | */ | |
432 | %rename("CLOCK_CYCLES") BT_CLOCK_CYCLES; | |
433 | %rename("CLOCK_REAL") BT_CLOCK_REAL; | |
434 | ||
435 | enum bt_clock_type { | |
436 | BT_CLOCK_CYCLES = 0, | |
437 | BT_CLOCK_REAL | |
438 | }; | |
439 | ||
440 | /* ================================================================= | |
441 | TRACE-HANDLE.H, TRACE-HANDLE-INTERNAL.H | |
442 | ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ | |
443 | */ | |
444 | ||
445 | %rename("_bt_trace_handle_create") bt_trace_handle_create(struct bt_context *ctx); | |
446 | %rename("_bt_trace_handle_destroy") bt_trace_handle_destroy(struct bt_trace_handle *bt); | |
447 | struct bt_trace_handle *bt_trace_handle_create(struct bt_context *ctx); | |
448 | void bt_trace_handle_destroy(struct bt_trace_handle *bt); | |
449 | ||
450 | %rename("_bt_trace_handle_get_path") bt_trace_handle_get_path(struct bt_context *ctx, | |
451 | int handle_id); | |
452 | %rename("_bt_trace_handle_get_timestamp_begin") bt_trace_handle_get_timestamp_begin( | |
453 | struct bt_context *ctx, int handle_id, enum bt_clock_type type); | |
454 | %rename("_bt_trace_handle_get_timestamp_end") bt_trace_handle_get_timestamp_end( | |
455 | struct bt_context *ctx, int handle_id, enum bt_clock_type type); | |
24a3136a DS |
456 | const char *bt_trace_handle_get_path(struct bt_context *ctx, int handle_id); |
457 | uint64_t bt_trace_handle_get_timestamp_begin(struct bt_context *ctx, int handle_id, | |
458 | enum bt_clock_type type); | |
459 | uint64_t bt_trace_handle_get_timestamp_end(struct bt_context *ctx, int handle_id, | |
460 | enum bt_clock_type type); | |
461 | ||
462 | %rename("_bt_ctf_event_get_handle_id") bt_ctf_event_get_handle_id( | |
463 | const struct bt_ctf_event *event); | |
464 | int bt_ctf_event_get_handle_id(const struct bt_ctf_event *event); | |
465 | ||
466 | ||
467 | %pythoncode%{ | |
468 | ||
469 | class TraceHandle(object): | |
470 | """ | |
471 | The TraceHandle allows the user to manipulate a trace file directly. | |
472 | It is a unique identifier representing a trace file. | |
473 | Do not instantiate. | |
474 | """ | |
475 | ||
476 | def __init__(self): | |
477 | raise NotImplementedError("TraceHandle cannot be instantiated") | |
478 | ||
479 | def __repr__(self): | |
288209fb | 480 | return "Babeltrace TraceHandle: trace_id('{0}')".format(self._id) |
24a3136a DS |
481 | |
482 | def get_id(self): | |
483 | """Return the TraceHandle id.""" | |
484 | return self._id | |
485 | ||
486 | def get_path(self, context): | |
487 | """Return the path of a TraceHandle.""" | |
488 | try: | |
489 | return _bt_trace_handle_get_path(context._c, self._id) | |
490 | except AttributeError: | |
491 | raise TypeError("in get_path, " | |
492 | "argument 2 must be a Context instance") | |
493 | ||
494 | def get_timestamp_begin(self, context, clock_type): | |
495 | """Return the creation time of the buffers of a trace.""" | |
496 | try: | |
497 | return _bt_trace_handle_get_timestamp_begin( | |
498 | context._c, self._id,clock_type) | |
499 | except AttributeError: | |
500 | raise TypeError("in get_timestamp_begin, " | |
501 | "argument 2 must be a Context instance") | |
502 | ||
503 | def get_timestamp_end(self, context, clock_type): | |
504 | """Return the destruction timestamp of the buffers of a trace.""" | |
505 | try: | |
506 | return _bt_trace_handle_get_timestamp_end( | |
507 | context._c, self._id, clock_type) | |
508 | except AttributeError: | |
509 | raise TypeError("in get_timestamp_end, " | |
510 | "argument 2 must be a Context instance") | |
511 | ||
512 | %} | |
513 | ||
514 | ||
515 | ||
516 | // ================================================================= | |
517 | // CTF | |
518 | // ================================================================= | |
519 | ||
520 | /* ================================================================= | |
521 | ITERATOR.H, EVENTS.H | |
522 | ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ | |
523 | */ | |
524 | ||
525 | //Iterator | |
526 | %rename("_bt_ctf_iter_create") bt_ctf_iter_create(struct bt_context *ctx, | |
527 | const struct bt_iter_pos *begin_pos, | |
528 | const struct bt_iter_pos *end_pos); | |
529 | %rename("_bt_ctf_get_iter") bt_ctf_get_iter(struct bt_ctf_iter *iter); | |
530 | %rename("_bt_ctf_iter_destroy") bt_ctf_iter_destroy(struct bt_ctf_iter *iter); | |
531 | %rename("_bt_ctf_iter_read_event") bt_ctf_iter_read_event(struct bt_ctf_iter *iter); | |
532 | ||
533 | struct bt_ctf_iter *bt_ctf_iter_create(struct bt_context *ctx, | |
534 | const struct bt_iter_pos *begin_pos, | |
535 | const struct bt_iter_pos *end_pos); | |
536 | struct bt_iter *bt_ctf_get_iter(struct bt_ctf_iter *iter); | |
537 | void bt_ctf_iter_destroy(struct bt_ctf_iter *iter); | |
538 | struct bt_ctf_event *bt_ctf_iter_read_event(struct bt_ctf_iter *iter); | |
539 | ||
540 | ||
541 | //Events | |
542 | ||
543 | %rename("_bt_ctf_get_top_level_scope") bt_ctf_get_top_level_scope(const struct | |
544 | bt_ctf_event *event, enum bt_ctf_scope scope); | |
545 | %rename("_bt_ctf_event_name") bt_ctf_event_name(const struct bt_ctf_event *ctf_event); | |
546 | %rename("_bt_ctf_get_timestamp") bt_ctf_get_timestamp( | |
547 | const struct bt_ctf_event *ctf_event); | |
548 | %rename("_bt_ctf_get_cycles") bt_ctf_get_cycles( | |
549 | const struct bt_ctf_event *ctf_event); | |
550 | ||
551 | %rename("_bt_ctf_get_field") bt_ctf_get_field(const struct bt_ctf_event *ctf_event, | |
2c0df204 | 552 | const struct bt_definition *scope, const char *field); |
24a3136a | 553 | %rename("_bt_ctf_get_index") bt_ctf_get_index(const struct bt_ctf_event *ctf_event, |
2c0df204 XH |
554 | const struct bt_definition *field, unsigned int index); |
555 | %rename("_bt_ctf_field_name") bt_ctf_field_name(const struct bt_definition *field); | |
556 | %rename("_bt_ctf_field_type") bt_ctf_field_type(const struct bt_declaration *field); | |
24a3136a | 557 | %rename("_bt_ctf_get_int_signedness") bt_ctf_get_int_signedness( |
2c0df204 XH |
558 | const struct bt_declaration *field); |
559 | %rename("_bt_ctf_get_int_base") bt_ctf_get_int_base(const struct bt_declaration *field); | |
24a3136a | 560 | %rename("_bt_ctf_get_int_byte_order") bt_ctf_get_int_byte_order( |
2c0df204 XH |
561 | const struct bt_declaration *field); |
562 | %rename("_bt_ctf_get_int_len") bt_ctf_get_int_len(const struct bt_declaration *field); | |
563 | %rename("_bt_ctf_get_encoding") bt_ctf_get_encoding(const struct bt_declaration *field); | |
564 | %rename("_bt_ctf_get_array_len") bt_ctf_get_array_len(const struct bt_declaration *field); | |
565 | %rename("_bt_ctf_get_uint64") bt_ctf_get_uint64(const struct bt_definition *field); | |
566 | %rename("_bt_ctf_get_int64") bt_ctf_get_int64(const struct bt_definition *field); | |
567 | %rename("_bt_ctf_get_char_array") bt_ctf_get_char_array(const struct bt_definition *field); | |
568 | %rename("_bt_ctf_get_string") bt_ctf_get_string(const struct bt_definition *field); | |
24a3136a DS |
569 | %rename("_bt_ctf_field_get_error") bt_ctf_field_get_error(void); |
570 | %rename("_bt_ctf_get_decl_event_name") bt_ctf_get_decl_event_name(const struct | |
571 | bt_ctf_event_decl *event); | |
572 | %rename("_bt_ctf_get_decl_field_name") bt_ctf_get_decl_field_name( | |
573 | const struct bt_ctf_field_decl *field); | |
f01efa78 | 574 | %rename("_bt_ctf_get_decl_from_def") bt_ctf_get_decl_from_def( |
2c0df204 | 575 | const struct bt_definition *field); |
24a3136a | 576 | |
2c0df204 | 577 | const struct bt_definition *bt_ctf_get_top_level_scope(const struct bt_ctf_event *ctf_event, |
24a3136a DS |
578 | enum bt_ctf_scope scope); |
579 | const char *bt_ctf_event_name(const struct bt_ctf_event *ctf_event); | |
580 | uint64_t bt_ctf_get_timestamp(const struct bt_ctf_event *ctf_event); | |
581 | uint64_t bt_ctf_get_cycles(const struct bt_ctf_event *ctf_event); | |
2c0df204 XH |
582 | const struct bt_definition *bt_ctf_get_field(const struct bt_ctf_event *ctf_event, |
583 | const struct bt_definition *scope, | |
24a3136a | 584 | const char *field); |
2c0df204 XH |
585 | const struct bt_definition *bt_ctf_get_index(const struct bt_ctf_event *ctf_event, |
586 | const struct bt_definition *field, | |
24a3136a | 587 | unsigned int index); |
2c0df204 XH |
588 | const char *bt_ctf_field_name(const struct bt_definition *field); |
589 | enum ctf_type_id bt_ctf_field_type(const struct bt_declaration *field); | |
590 | int bt_ctf_get_int_signedness(const struct bt_declaration *field); | |
591 | int bt_ctf_get_int_base(const struct bt_declaration *field); | |
592 | int bt_ctf_get_int_byte_order(const struct bt_declaration *field); | |
593 | ssize_t bt_ctf_get_int_len(const struct bt_declaration *field); | |
594 | enum ctf_string_encoding bt_ctf_get_encoding(const struct bt_declaration *field); | |
595 | int bt_ctf_get_array_len(const struct bt_declaration *field); | |
596 | uint64_t bt_ctf_get_uint64(const struct bt_definition *field); | |
597 | int64_t bt_ctf_get_int64(const struct bt_definition *field); | |
598 | char *bt_ctf_get_char_array(const struct bt_definition *field); | |
599 | char *bt_ctf_get_string(const struct bt_definition *field); | |
24a3136a DS |
600 | int bt_ctf_field_get_error(void); |
601 | const char *bt_ctf_get_decl_event_name(const struct bt_ctf_event_decl *event); | |
602 | const char *bt_ctf_get_decl_field_name(const struct bt_ctf_field_decl *field); | |
2c0df204 | 603 | const struct bt_declaration *bt_ctf_get_decl_from_def(const struct bt_definition *field); |
24a3136a DS |
604 | |
605 | %pythoncode%{ | |
606 | ||
607 | class ctf: | |
608 | ||
609 | #enum equivalent, accessible constants | |
610 | #These are taken directly from ctf/events.h | |
611 | #All changes to enums must also be made here | |
612 | class type_id: | |
613 | UNKNOWN = 0 | |
614 | INTEGER = 1 | |
615 | FLOAT = 2 | |
616 | ENUM = 3 | |
617 | STRING = 4 | |
618 | STRUCT = 5 | |
619 | UNTAGGED_VARIANT = 6 | |
620 | VARIANT = 7 | |
621 | ARRAY = 8 | |
622 | SEQUENCE = 9 | |
623 | NR_CTF_TYPES = 10 | |
624 | ||
625 | class scope: | |
626 | TRACE_PACKET_HEADER = 0 | |
627 | STREAM_PACKET_CONTEXT = 1 | |
628 | STREAM_EVENT_HEADER = 2 | |
629 | STREAM_EVENT_CONTEXT = 3 | |
630 | EVENT_CONTEXT = 4 | |
631 | EVENT_FIELDS = 5 | |
632 | ||
633 | class string_encoding: | |
634 | NONE = 0 | |
635 | UTF8 = 1 | |
636 | ASCII = 2 | |
637 | UNKNOWN = 3 | |
638 | ||
639 | class Iterator(Iterator, object): | |
640 | """ | |
641 | Allocate a CTF trace collection iterator. | |
642 | ||
643 | begin_pos and end_pos are optional parameters to specify the | |
644 | position at which the trace collection should be seeked upon | |
645 | iterator creation, and the position at which iteration will | |
646 | start returning "EOF". | |
647 | ||
648 | By default, if begin_pos is None, a SEEK_CUR is performed at | |
649 | creation. By default, if end_pos is None, a SEEK_END (end of | |
650 | trace) is the EOF criterion. | |
651 | ||
652 | Only one iterator can be created against a context. If more than one | |
653 | iterator is being created for the same context, the second creation | |
654 | will return None. The previous iterator must be destroyed before | |
655 | creation of the new iterator for this function to succeed. | |
656 | """ | |
657 | ||
658 | def __new__(cls, context, begin_pos = None, end_pos = None): | |
659 | # __new__ is used to control the return value | |
660 | # as the ctf.Iterator class should return None | |
661 | # if bt_ctf_iter_create returns NULL | |
662 | ||
663 | if begin_pos is None: | |
664 | bp = None | |
665 | else: | |
666 | bp = begin_pos._pos | |
667 | if end_pos is None: | |
668 | ep = None | |
669 | else: | |
670 | ep = end_pos._pos | |
671 | try: | |
672 | it = _bt_ctf_iter_create(context._c, bp, ep) | |
673 | except AttributeError: | |
674 | raise TypeError("in __init__, " | |
675 | "argument 2 must be a Context instance") | |
676 | if it is None: | |
677 | return None | |
678 | ||
679 | ret_class = super(ctf.Iterator, cls).__new__(cls) | |
680 | ret_class._i = it | |
681 | return ret_class | |
682 | ||
683 | def __init__(self, context, begin_pos = None, end_pos = None): | |
684 | Iterator.__init__(self, None, None, None, | |
685 | _bt_ctf_get_iter(self._i)) | |
686 | ||
687 | def __del__(self): | |
688 | _bt_ctf_iter_destroy(self._i) | |
689 | ||
690 | def read_event(self): | |
691 | """ | |
692 | Read the iterator's current event data. | |
693 | Return current event on success, None on end of trace. | |
694 | """ | |
695 | ret = _bt_ctf_iter_read_event(self._i) | |
696 | if ret is None: | |
697 | return ret | |
698 | ev = ctf.Event.__new__(ctf.Event) | |
699 | ev._e = ret | |
700 | return ev | |
701 | ||
702 | ||
703 | class Event(object): | |
704 | """ | |
705 | This class represents an event from the trace. | |
706 | It is obtained with read_event() from ctf.Iterator. | |
707 | Do not instantiate. | |
708 | """ | |
709 | ||
710 | def __init__(self): | |
711 | raise NotImplementedError("ctf.Event cannot be instantiated") | |
712 | ||
713 | def get_top_level_scope(self, scope): | |
714 | """ | |
715 | Return a definition of the top-level scope | |
716 | Top-level scopes are defined in ctf.scope. | |
717 | In order to get a field or a field list, the user needs to pass a | |
718 | scope as argument, this scope can be a top-level scope or a scope | |
719 | relative to an arbitrary field. This function provides the mapping | |
720 | between the scope and the actual definition of top-level scopes. | |
721 | On error return None. | |
722 | """ | |
723 | evDef = ctf.Definition.__new__(ctf.Definition) | |
724 | evDef._d = _bt_ctf_get_top_level_scope(self._e, scope) | |
725 | if evDef._d is None: | |
726 | return None | |
727 | return evDef | |
728 | ||
729 | def get_name(self): | |
730 | """Return the name of the event or None on error.""" | |
731 | return _bt_ctf_event_name(self._e) | |
732 | ||
733 | def get_cycles(self): | |
734 | """ | |
735 | Return the timestamp of the event as written in | |
736 | the packet (in cycles) or -1ULL on error. | |
737 | """ | |
738 | return _bt_ctf_get_cycles(self._e) | |
739 | ||
740 | def get_timestamp(self): | |
741 | """ | |
742 | Return the timestamp of the event offsetted with the | |
743 | system clock source or -1ULL on error. | |
744 | """ | |
745 | return _bt_ctf_get_timestamp(self._e) | |
746 | ||
7a30a668 XH |
747 | def get_field_with_scope(self, scope, field): |
748 | """ | |
749 | Return the definition of a specific field. | |
750 | Return None on error. | |
751 | """ | |
24a3136a DS |
752 | evDef = ctf.Definition.__new__(ctf.Definition) |
753 | try: | |
754 | evDef._d = _bt_ctf_get_field(self._e, scope._d, field) | |
755 | except AttributeError: | |
756 | raise TypeError("in get_field, argument 2 must be a " | |
757 | "Definition (scope) instance") | |
7a30a668 XH |
758 | if evDef._d is None: |
759 | return None | |
760 | evDef._s = scope | |
24a3136a DS |
761 | return evDef |
762 | ||
7a30a668 XH |
763 | def get_field(self, field): |
764 | """ | |
765 | Return the definition of fields by a name | |
766 | Return None on error | |
767 | """ | |
768 | eventScope = self.get_top_level_scope(ctf.scope.EVENT_FIELDS) | |
769 | streamScope = self.get_top_level_scope(ctf.scope.STREAM_EVENT_CONTEXT) | |
770 | fields_by_name = [] | |
771 | ||
772 | if eventScope is not None: | |
773 | evDef = self.get_field_with_scope(eventScope, field) | |
774 | if evDef is not None: | |
775 | fields_by_name.append(evDef) | |
776 | ||
777 | if streamScope is not None: | |
778 | evDef = self.get_field_with_scope(streamScope, field) | |
779 | if evDef is not None: | |
780 | fields_by_name.append(evDef); | |
781 | ||
782 | if not fields_by_name: | |
783 | return None | |
784 | return fields_by_name | |
785 | ||
786 | def get_field_list_with_scope(self, scope): | |
24a3136a | 787 | """ |
7a30a668 | 788 | Return a list of Definitions associated with the scope |
24a3136a DS |
789 | Return None on error. |
790 | """ | |
791 | try: | |
792 | field_lc = _bt_python_field_listcaller(self._e, scope._d) | |
793 | except AttributeError: | |
794 | raise TypeError("in get_field_list, argument 2 must be a " | |
795 | "Definition (scope) instance") | |
796 | ||
797 | if field_lc is None: | |
798 | return None | |
799 | ||
800 | def_list = [] | |
801 | i = 0 | |
802 | while True: | |
803 | tmp = ctf.Definition.__new__(ctf.Definition) | |
804 | tmp._d = _bt_python_field_one_from_list(field_lc, i) | |
805 | ||
806 | if tmp._d is None: | |
807 | #Last item of list is None, assured in | |
808 | #_bt_python_field_listcaller | |
809 | break | |
810 | ||
7a30a668 | 811 | tmp._s = scope |
24a3136a DS |
812 | def_list.append(tmp) |
813 | i += 1 | |
814 | return def_list | |
815 | ||
7a30a668 XH |
816 | def get_field_list(self): |
817 | """Return a list of Definitions or None on error.""" | |
818 | eventScope = self.get_top_level_scope(ctf.scope.EVENT_FIELDS) | |
819 | streamScope = self.get_top_level_scope(ctf.scope.STREAM_EVENT_CONTEXT) | |
820 | ||
821 | def_list = [] | |
822 | if eventScope is not None: | |
823 | event_field_list = self.get_field_list_with_scope(eventScope) | |
824 | if event_field_list is not None: | |
825 | def_list = event_field_list | |
826 | ||
827 | if streamScope is not None: | |
828 | event_field_list = self.get_field_list_with_scope(streamScope) | |
829 | if event_field_list is not None: | |
830 | def_list.extend(event_field_list) | |
831 | ||
832 | if not def_list: | |
833 | return None | |
834 | return def_list | |
835 | ||
24a3136a DS |
836 | def get_index(self, field, index): |
837 | """ | |
838 | If the field is an array or a sequence, return the element | |
839 | at position index, otherwise return None | |
840 | """ | |
841 | evDef = ctf.Definition.__new__(ctf.Definition) | |
842 | try: | |
843 | evDef._d = _bt_ctf_get_index(self._e, field._d, index) | |
844 | except AttributeError: | |
845 | raise TypeError("in get_index, argument 2 must be a " | |
846 | "Definition (field) instance") | |
847 | ||
848 | if evDef._d is None: | |
849 | return None | |
850 | return evDef | |
851 | ||
852 | def get_handle(self): | |
853 | """ | |
854 | Get the TraceHandle associated with an event | |
855 | Return None on error | |
856 | """ | |
857 | ret = _bt_ctf_event_get_handle_id(self._e) | |
858 | if ret < 0: | |
859 | return None | |
860 | ||
861 | th = TraceHandle.__new__(TraceHandle) | |
862 | th._id = ret | |
863 | return th | |
864 | ||
865 | def get_context(self): | |
866 | """ | |
867 | Get the context associated with an event. | |
868 | Return None on error. | |
869 | """ | |
870 | ctx = Context() | |
871 | ctx._c = _bt_ctf_event_get_context(self._e); | |
872 | if ctx._c is None: | |
873 | return None | |
874 | else: | |
875 | return ctx | |
876 | ||
877 | ||
878 | class Definition(object): | |
879 | """Definition class. Do not instantiate.""" | |
880 | ||
881 | def __init__(self): | |
882 | raise NotImplementedError("ctf.Definition cannot be instantiated") | |
883 | ||
884 | def __repr__(self): | |
288209fb | 885 | return "Babeltrace Definition: name('{0}'), type({1})".format( |
24a3136a DS |
886 | self.field_name(), self.field_type()) |
887 | ||
888 | def field_name(self): | |
889 | """Return the name of a field or None on error.""" | |
890 | return _bt_ctf_field_name(self._d) | |
891 | ||
892 | def field_type(self): | |
893 | """Return the type of a field or -1 if unknown.""" | |
f01efa78 | 894 | return _bt_ctf_field_type(_bt_ctf_get_decl_from_def(self._d)) |
24a3136a DS |
895 | |
896 | def get_int_signedness(self): | |
897 | """ | |
898 | Return the signedness of an integer: | |
899 | 0 if unsigned; 1 if signed; -1 on error. | |
900 | """ | |
f01efa78 | 901 | return _bt_ctf_get_int_signedness(_bt_ctf_get_decl_from_def(self._d)) |
24a3136a DS |
902 | |
903 | def get_int_base(self): | |
904 | """Return the base of an int or a negative value on error.""" | |
f01efa78 | 905 | return _bt_ctf_get_int_base(_bt_ctf_get_decl_from_def(self._d)) |
24a3136a DS |
906 | |
907 | def get_int_byte_order(self): | |
908 | """ | |
909 | Return the byte order of an int or a negative | |
910 | value on error. | |
911 | """ | |
f01efa78 | 912 | return _bt_ctf_get_int_byte_order(_bt_ctf_get_decl_from_def(self._d)) |
24a3136a DS |
913 | |
914 | def get_int_len(self): | |
915 | """ | |
916 | Return the size, in bits, of an int or a negative | |
917 | value on error. | |
918 | """ | |
135c8f9c | 919 | return _bt_ctf_get_int_len(_bt_ctf_get_decl_from_def(self._d)) |
24a3136a DS |
920 | |
921 | def get_encoding(self): | |
922 | """ | |
923 | Return the encoding of an int or a string. | |
924 | Return a negative value on error. | |
925 | """ | |
f01efa78 | 926 | return _bt_ctf_get_encoding(_bt_ctf_get_decl_from_def(self._d)) |
24a3136a DS |
927 | |
928 | def get_array_len(self): | |
929 | """ | |
930 | Return the len of an array or a negative | |
931 | value on error. | |
932 | """ | |
f01efa78 | 933 | return _bt_ctf_get_array_len(_bt_ctf_get_decl_from_def(self._d)) |
24a3136a DS |
934 | |
935 | def get_uint64(self): | |
936 | """ | |
937 | Return the value associated with the field. | |
938 | If the field does not exist or is not of the type requested, | |
939 | the value returned is undefined. To check if an error occured, | |
940 | use the ctf.field_error() function after accessing a field. | |
941 | """ | |
942 | return _bt_ctf_get_uint64(self._d) | |
943 | ||
944 | def get_int64(self): | |
945 | """ | |
946 | Return the value associated with the field. | |
947 | If the field does not exist or is not of the type requested, | |
948 | the value returned is undefined. To check if an error occured, | |
949 | use the ctf.field_error() function after accessing a field. | |
950 | """ | |
951 | return _bt_ctf_get_int64(self._d) | |
952 | ||
953 | def get_char_array(self): | |
954 | """ | |
955 | Return the value associated with the field. | |
956 | If the field does not exist or is not of the type requested, | |
957 | the value returned is undefined. To check if an error occured, | |
958 | use the ctf.field_error() function after accessing a field. | |
959 | """ | |
960 | return _bt_ctf_get_char_array(self._d) | |
961 | ||
962 | def get_str(self): | |
963 | """ | |
964 | Return the value associated with the field. | |
965 | If the field does not exist or is not of the type requested, | |
966 | the value returned is undefined. To check if an error occured, | |
967 | use the ctf.field_error() function after accessing a field. | |
968 | """ | |
969 | return _bt_ctf_get_string(self._d) | |
970 | ||
7a30a668 XH |
971 | def get_scope(self): |
972 | """Return the scope of a field or None on error.""" | |
973 | return self._s | |
24a3136a DS |
974 | |
975 | class EventDecl(object): | |
976 | """Event declaration class. Do not instantiate.""" | |
977 | ||
978 | def __init__(self): | |
979 | raise NotImplementedError("ctf.EventDecl cannot be instantiated") | |
980 | ||
981 | def __repr__(self): | |
288209fb | 982 | return "Babeltrace EventDecl: name {0}".format(self.get_name()) |
24a3136a DS |
983 | |
984 | def get_name(self): | |
985 | """Return the name of the event or None on error""" | |
986 | return _bt_ctf_get_decl_event_name(self._d) | |
987 | ||
988 | def get_decl_fields(self, scope): | |
989 | """ | |
990 | Return a list of ctf.FieldDecl | |
991 | Return None on error. | |
992 | """ | |
993 | ptr_list = _by_python_field_decl_listcaller(self._d, scope) | |
994 | ||
995 | if ptr_list is None: | |
996 | return None | |
997 | ||
998 | decl_list = [] | |
999 | i = 0 | |
1000 | while True: | |
1001 | tmp = ctf.FieldDecl.__new__(ctf.FieldDecl) | |
1002 | tmp._d = _bt_python_field_decl_one_from_list( | |
1003 | ptr_list, i) | |
1004 | ||
1005 | if tmp._d is None: | |
1006 | #Last item of list is None | |
1007 | break | |
1008 | ||
1009 | decl_list.append(tmp) | |
1010 | i += 1 | |
1011 | return decl_list | |
1012 | ||
1013 | ||
1014 | class FieldDecl(object): | |
1015 | """Field declaration class. Do not instantiate.""" | |
1016 | ||
1017 | def __init__(self): | |
1018 | raise NotImplementedError("ctf.FieldDecl cannot be instantiated") | |
1019 | ||
1020 | def __repr__(self): | |
288209fb | 1021 | return "Babeltrace FieldDecl: name {0}".format(self.get_name()) |
24a3136a DS |
1022 | |
1023 | def get_name(self): | |
1024 | """Return the name of a FieldDecl or None on error""" | |
1025 | return _bt_ctf_get_decl_field_name(self._d) | |
1026 | ||
1027 | ||
1028 | @staticmethod | |
1029 | def field_error(): | |
1030 | """ | |
1031 | Return the last error code encountered while | |
1032 | accessing a field and reset the error flag. | |
1033 | Return 0 if no error, a negative value otherwise. | |
1034 | """ | |
1035 | return _bt_ctf_field_get_error() | |
1036 | ||
1037 | @staticmethod | |
1038 | def get_event_decl_list(trace_handle, context): | |
1039 | """ | |
1040 | Return a list of ctf.EventDecl | |
1041 | Return None on error. | |
1042 | """ | |
1043 | try: | |
1044 | handle_id = trace_handle._id | |
1045 | except AttributeError: | |
1046 | raise TypeError("in get_event_decl_list, " | |
1047 | "argument 1 must be a TraceHandle instance") | |
1048 | try: | |
1049 | ptr_list = _bt_python_event_decl_listcaller(handle_id, context._c) | |
1050 | except AttributeError: | |
1051 | raise TypeError("in get_event_decl_list, " | |
1052 | "argument 2 must be a Context instance") | |
1053 | ||
1054 | if ptr_list is None: | |
1055 | return None | |
1056 | ||
1057 | decl_list = [] | |
1058 | i = 0 | |
1059 | while True: | |
1060 | tmp = ctf.EventDecl.__new__(ctf.EventDecl) | |
1061 | tmp._d = _bt_python_decl_one_from_list(ptr_list, i) | |
1062 | ||
1063 | if tmp._d is None: | |
1064 | #Last item of list is None | |
1065 | break | |
1066 | ||
1067 | decl_list.append(tmp) | |
1068 | i += 1 | |
1069 | return decl_list | |
1070 | ||
1071 | %} | |
1072 | ||
1073 | ||
1074 | ||
1075 | // ================================================================= | |
1076 | // NEW FUNCTIONS | |
1077 | // File and list-related | |
1078 | // python-complements.h | |
1079 | // ================================================================= | |
1080 | ||
1081 | %include python-complements.c | |
1082 | ||
1083 | %pythoncode %{ | |
1084 | ||
1085 | class File(object): | |
1086 | """ | |
1087 | Open a file for babeltrace. | |
1088 | ||
1089 | file_path is a string containing the path or None to use the | |
1090 | standard output in writing mode. | |
1091 | ||
1092 | The mode can be 'r', 'w' or 'a' for reading (default), writing or | |
1093 | appending. The file will be created if it doesn't exist when | |
1094 | opened for writing or appending; it will be truncated when opened | |
1095 | for writing. Add a 'b' to the mode for binary files. Add a '+' | |
1096 | to the mode to allow simultaneous reading and writing. | |
1097 | """ | |
1098 | ||
1099 | def __new__(cls, file_path, mode='r'): | |
1100 | # __new__ is used to control the return value | |
1101 | # as the File class should return None | |
1102 | # if _bt_file_open returns NULL | |
1103 | ||
1104 | # Type check | |
1105 | if file_path is not None and type(file_path) is not str: | |
1106 | raise TypeError("in method __init__, argument 2 of type 'str'") | |
1107 | if type(mode) is not str: | |
1108 | raise TypeError("in method __init__, argument 3 of type 'str'") | |
1109 | ||
1110 | # Opening file | |
1111 | file_ptr = _bt_file_open(file_path, mode) | |
1112 | if file_ptr is None: | |
1113 | return None | |
1114 | ||
1115 | # Class instantiation | |
1116 | file_inst = super(File, cls).__new__(cls) | |
1117 | file_inst._file = file_ptr | |
1118 | return file_inst | |
1119 | ||
1120 | def __init__(self, file_path, mode='r'): | |
1121 | self._opened = True | |
1122 | self._use_stdout = False | |
1123 | ||
1124 | if file_path is None: | |
1125 | # use stdout | |
1126 | file_path = "stdout" | |
1127 | mode = 'w' | |
1128 | self._use_stdout = True | |
1129 | ||
1130 | self._file_path = file_path | |
1131 | self._mode = mode | |
1132 | ||
1133 | def __del__(self): | |
1134 | self.close() | |
1135 | ||
1136 | def __repr__(self): | |
1137 | if self._opened: | |
1138 | stat = 'opened' | |
1139 | else: | |
1140 | stat = 'closed' | |
288209fb | 1141 | return "{0} babeltrace File; file_path('{1}'), mode('{2}')".format( |
24a3136a DS |
1142 | stat, self._file_path, self._mode) |
1143 | ||
1144 | def close(self): | |
1145 | """Close the file. Is also called using del.""" | |
1146 | if self._opened and not self._use_stdout: | |
1147 | _bt_file_close(self._file) | |
1148 | self._opened = False | |
1149 | %} |