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1 | /* UI_FILE - a generic STDIO like output stream. | |
2 | ||
3 | Copyright (C) 1999-2015 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | /* Implement the ``struct ui_file'' object. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "ui-file.h" | |
24 | #include "gdb_obstack.h" | |
25 | #include "gdb_select.h" | |
26 | #include "filestuff.h" | |
27 | ||
28 | static ui_file_isatty_ftype null_file_isatty; | |
29 | static ui_file_write_ftype null_file_write; | |
30 | static ui_file_write_ftype null_file_write_async_safe; | |
31 | static ui_file_fputs_ftype null_file_fputs; | |
32 | static ui_file_read_ftype null_file_read; | |
33 | static ui_file_flush_ftype null_file_flush; | |
34 | static ui_file_delete_ftype null_file_delete; | |
35 | static ui_file_rewind_ftype null_file_rewind; | |
36 | static ui_file_put_ftype null_file_put; | |
37 | static ui_file_fseek_ftype null_file_fseek; | |
38 | ||
39 | struct ui_file | |
40 | { | |
41 | int *magic; | |
42 | ui_file_flush_ftype *to_flush; | |
43 | ui_file_write_ftype *to_write; | |
44 | ui_file_write_async_safe_ftype *to_write_async_safe; | |
45 | ui_file_fputs_ftype *to_fputs; | |
46 | ui_file_read_ftype *to_read; | |
47 | ui_file_delete_ftype *to_delete; | |
48 | ui_file_isatty_ftype *to_isatty; | |
49 | ui_file_rewind_ftype *to_rewind; | |
50 | ui_file_put_ftype *to_put; | |
51 | ui_file_fseek_ftype *to_fseek; | |
52 | void *to_data; | |
53 | }; | |
54 | int ui_file_magic; | |
55 | ||
56 | struct ui_file * | |
57 | ui_file_new (void) | |
58 | { | |
59 | struct ui_file *file = XNEW (struct ui_file); | |
60 | ||
61 | file->magic = &ui_file_magic; | |
62 | set_ui_file_data (file, NULL, null_file_delete); | |
63 | set_ui_file_flush (file, null_file_flush); | |
64 | set_ui_file_write (file, null_file_write); | |
65 | set_ui_file_write_async_safe (file, null_file_write_async_safe); | |
66 | set_ui_file_fputs (file, null_file_fputs); | |
67 | set_ui_file_read (file, null_file_read); | |
68 | set_ui_file_isatty (file, null_file_isatty); | |
69 | set_ui_file_rewind (file, null_file_rewind); | |
70 | set_ui_file_put (file, null_file_put); | |
71 | set_ui_file_fseek (file, null_file_fseek); | |
72 | return file; | |
73 | } | |
74 | ||
75 | void | |
76 | ui_file_delete (struct ui_file *file) | |
77 | { | |
78 | file->to_delete (file); | |
79 | xfree (file); | |
80 | } | |
81 | ||
82 | static int | |
83 | null_file_isatty (struct ui_file *file) | |
84 | { | |
85 | return 0; | |
86 | } | |
87 | ||
88 | static void | |
89 | null_file_rewind (struct ui_file *file) | |
90 | { | |
91 | return; | |
92 | } | |
93 | ||
94 | static void | |
95 | null_file_put (struct ui_file *file, | |
96 | ui_file_put_method_ftype *write, | |
97 | void *dest) | |
98 | { | |
99 | return; | |
100 | } | |
101 | ||
102 | static void | |
103 | null_file_flush (struct ui_file *file) | |
104 | { | |
105 | return; | |
106 | } | |
107 | ||
108 | static void | |
109 | null_file_write (struct ui_file *file, | |
110 | const char *buf, | |
111 | long sizeof_buf) | |
112 | { | |
113 | if (file->to_fputs == null_file_fputs) | |
114 | /* Both the write and fputs methods are null. Discard the | |
115 | request. */ | |
116 | return; | |
117 | else | |
118 | { | |
119 | /* The fputs method isn't null, slowly pass the write request | |
120 | onto that. FYI, this isn't as bad as it may look - the | |
121 | current (as of 1999-11-07) printf_* function calls fputc and | |
122 | fputc does exactly the below. By having a write function it | |
123 | is possible to clean up that code. */ | |
124 | int i; | |
125 | char b[2]; | |
126 | ||
127 | b[1] = '\0'; | |
128 | for (i = 0; i < sizeof_buf; i++) | |
129 | { | |
130 | b[0] = buf[i]; | |
131 | file->to_fputs (b, file); | |
132 | } | |
133 | return; | |
134 | } | |
135 | } | |
136 | ||
137 | static long | |
138 | null_file_read (struct ui_file *file, | |
139 | char *buf, | |
140 | long sizeof_buf) | |
141 | { | |
142 | errno = EBADF; | |
143 | return 0; | |
144 | } | |
145 | ||
146 | static void | |
147 | null_file_fputs (const char *buf, struct ui_file *file) | |
148 | { | |
149 | if (file->to_write == null_file_write) | |
150 | /* Both the write and fputs methods are null. Discard the | |
151 | request. */ | |
152 | return; | |
153 | else | |
154 | { | |
155 | /* The write method was implemented, use that. */ | |
156 | file->to_write (file, buf, strlen (buf)); | |
157 | } | |
158 | } | |
159 | ||
160 | static void | |
161 | null_file_write_async_safe (struct ui_file *file, | |
162 | const char *buf, | |
163 | long sizeof_buf) | |
164 | { | |
165 | return; | |
166 | } | |
167 | ||
168 | static void | |
169 | null_file_delete (struct ui_file *file) | |
170 | { | |
171 | return; | |
172 | } | |
173 | ||
174 | static int | |
175 | null_file_fseek (struct ui_file *stream, long offset, int whence) | |
176 | { | |
177 | errno = EBADF; | |
178 | ||
179 | return -1; | |
180 | } | |
181 | ||
182 | void * | |
183 | ui_file_data (struct ui_file *file) | |
184 | { | |
185 | if (file->magic != &ui_file_magic) | |
186 | internal_error (__FILE__, __LINE__, | |
187 | _("ui_file_data: bad magic number")); | |
188 | return file->to_data; | |
189 | } | |
190 | ||
191 | void | |
192 | gdb_flush (struct ui_file *file) | |
193 | { | |
194 | file->to_flush (file); | |
195 | } | |
196 | ||
197 | int | |
198 | ui_file_isatty (struct ui_file *file) | |
199 | { | |
200 | return file->to_isatty (file); | |
201 | } | |
202 | ||
203 | void | |
204 | ui_file_rewind (struct ui_file *file) | |
205 | { | |
206 | file->to_rewind (file); | |
207 | } | |
208 | ||
209 | void | |
210 | ui_file_put (struct ui_file *file, | |
211 | ui_file_put_method_ftype *write, | |
212 | void *dest) | |
213 | { | |
214 | file->to_put (file, write, dest); | |
215 | } | |
216 | ||
217 | void | |
218 | ui_file_write (struct ui_file *file, | |
219 | const char *buf, | |
220 | long length_buf) | |
221 | { | |
222 | file->to_write (file, buf, length_buf); | |
223 | } | |
224 | ||
225 | void | |
226 | ui_file_write_for_put (void *data, const char *buffer, long length_buffer) | |
227 | { | |
228 | ui_file_write (data, buffer, length_buffer); | |
229 | } | |
230 | ||
231 | void | |
232 | ui_file_write_async_safe (struct ui_file *file, | |
233 | const char *buf, | |
234 | long length_buf) | |
235 | { | |
236 | file->to_write_async_safe (file, buf, length_buf); | |
237 | } | |
238 | ||
239 | long | |
240 | ui_file_read (struct ui_file *file, char *buf, long length_buf) | |
241 | { | |
242 | return file->to_read (file, buf, length_buf); | |
243 | } | |
244 | ||
245 | int | |
246 | ui_file_fseek (struct ui_file *file, long offset, int whence) | |
247 | { | |
248 | return file->to_fseek (file, offset, whence); | |
249 | } | |
250 | ||
251 | void | |
252 | fputs_unfiltered (const char *buf, struct ui_file *file) | |
253 | { | |
254 | file->to_fputs (buf, file); | |
255 | } | |
256 | ||
257 | void | |
258 | set_ui_file_flush (struct ui_file *file, ui_file_flush_ftype *flush_ptr) | |
259 | { | |
260 | file->to_flush = flush_ptr; | |
261 | } | |
262 | ||
263 | void | |
264 | set_ui_file_isatty (struct ui_file *file, ui_file_isatty_ftype *isatty_ptr) | |
265 | { | |
266 | file->to_isatty = isatty_ptr; | |
267 | } | |
268 | ||
269 | void | |
270 | set_ui_file_rewind (struct ui_file *file, ui_file_rewind_ftype *rewind_ptr) | |
271 | { | |
272 | file->to_rewind = rewind_ptr; | |
273 | } | |
274 | ||
275 | void | |
276 | set_ui_file_put (struct ui_file *file, ui_file_put_ftype *put_ptr) | |
277 | { | |
278 | file->to_put = put_ptr; | |
279 | } | |
280 | ||
281 | void | |
282 | set_ui_file_write (struct ui_file *file, | |
283 | ui_file_write_ftype *write_ptr) | |
284 | { | |
285 | file->to_write = write_ptr; | |
286 | } | |
287 | ||
288 | void | |
289 | set_ui_file_write_async_safe (struct ui_file *file, | |
290 | ui_file_write_async_safe_ftype *write_async_safe_ptr) | |
291 | { | |
292 | file->to_write_async_safe = write_async_safe_ptr; | |
293 | } | |
294 | ||
295 | void | |
296 | set_ui_file_read (struct ui_file *file, ui_file_read_ftype *read_ptr) | |
297 | { | |
298 | file->to_read = read_ptr; | |
299 | } | |
300 | ||
301 | void | |
302 | set_ui_file_fputs (struct ui_file *file, ui_file_fputs_ftype *fputs_ptr) | |
303 | { | |
304 | file->to_fputs = fputs_ptr; | |
305 | } | |
306 | ||
307 | void | |
308 | set_ui_file_fseek (struct ui_file *file, ui_file_fseek_ftype *fseek_ptr) | |
309 | { | |
310 | file->to_fseek = fseek_ptr; | |
311 | } | |
312 | ||
313 | void | |
314 | set_ui_file_data (struct ui_file *file, void *data, | |
315 | ui_file_delete_ftype *delete_ptr) | |
316 | { | |
317 | file->to_data = data; | |
318 | file->to_delete = delete_ptr; | |
319 | } | |
320 | ||
321 | /* ui_file utility function for converting a ``struct ui_file'' into | |
322 | a memory buffer. */ | |
323 | ||
324 | struct accumulated_ui_file | |
325 | { | |
326 | char *buffer; | |
327 | long length; | |
328 | }; | |
329 | ||
330 | static void | |
331 | do_ui_file_xstrdup (void *context, const char *buffer, long length) | |
332 | { | |
333 | struct accumulated_ui_file *acc = context; | |
334 | ||
335 | if (acc->buffer == NULL) | |
336 | acc->buffer = xmalloc (length + 1); | |
337 | else | |
338 | acc->buffer = xrealloc (acc->buffer, acc->length + length + 1); | |
339 | memcpy (acc->buffer + acc->length, buffer, length); | |
340 | acc->length += length; | |
341 | acc->buffer[acc->length] = '\0'; | |
342 | } | |
343 | ||
344 | char * | |
345 | ui_file_xstrdup (struct ui_file *file, long *length) | |
346 | { | |
347 | struct accumulated_ui_file acc; | |
348 | ||
349 | acc.buffer = NULL; | |
350 | acc.length = 0; | |
351 | ui_file_put (file, do_ui_file_xstrdup, &acc); | |
352 | if (acc.buffer == NULL) | |
353 | acc.buffer = xstrdup (""); | |
354 | if (length != NULL) | |
355 | *length = acc.length; | |
356 | return acc.buffer; | |
357 | } | |
358 | ||
359 | static void | |
360 | do_ui_file_obsavestring (void *context, const char *buffer, long length) | |
361 | { | |
362 | struct obstack *obstack = (struct obstack *) context; | |
363 | ||
364 | obstack_grow (obstack, buffer, length); | |
365 | } | |
366 | ||
367 | char * | |
368 | ui_file_obsavestring (struct ui_file *file, struct obstack *obstack, | |
369 | long *length) | |
370 | { | |
371 | ui_file_put (file, do_ui_file_obsavestring, obstack); | |
372 | *length = obstack_object_size (obstack); | |
373 | obstack_1grow (obstack, '\0'); | |
374 | return obstack_finish (obstack); | |
375 | } | |
376 | \f | |
377 | /* A pure memory based ``struct ui_file'' that can be used an output | |
378 | buffer. The buffers accumulated contents are available via | |
379 | ui_file_put(). */ | |
380 | ||
381 | struct mem_file | |
382 | { | |
383 | int *magic; | |
384 | char *buffer; | |
385 | int sizeof_buffer; | |
386 | int length_buffer; | |
387 | }; | |
388 | ||
389 | static ui_file_rewind_ftype mem_file_rewind; | |
390 | static ui_file_put_ftype mem_file_put; | |
391 | static ui_file_write_ftype mem_file_write; | |
392 | static ui_file_delete_ftype mem_file_delete; | |
393 | static struct ui_file *mem_file_new (void); | |
394 | static int mem_file_magic; | |
395 | ||
396 | static struct ui_file * | |
397 | mem_file_new (void) | |
398 | { | |
399 | struct mem_file *stream = XNEW (struct mem_file); | |
400 | struct ui_file *file = ui_file_new (); | |
401 | ||
402 | set_ui_file_data (file, stream, mem_file_delete); | |
403 | set_ui_file_rewind (file, mem_file_rewind); | |
404 | set_ui_file_put (file, mem_file_put); | |
405 | set_ui_file_write (file, mem_file_write); | |
406 | stream->magic = &mem_file_magic; | |
407 | stream->buffer = NULL; | |
408 | stream->sizeof_buffer = 0; | |
409 | stream->length_buffer = 0; | |
410 | return file; | |
411 | } | |
412 | ||
413 | static void | |
414 | mem_file_delete (struct ui_file *file) | |
415 | { | |
416 | struct mem_file *stream = ui_file_data (file); | |
417 | ||
418 | if (stream->magic != &mem_file_magic) | |
419 | internal_error (__FILE__, __LINE__, | |
420 | _("mem_file_delete: bad magic number")); | |
421 | if (stream->buffer != NULL) | |
422 | xfree (stream->buffer); | |
423 | xfree (stream); | |
424 | } | |
425 | ||
426 | struct ui_file * | |
427 | mem_fileopen (void) | |
428 | { | |
429 | return mem_file_new (); | |
430 | } | |
431 | ||
432 | static void | |
433 | mem_file_rewind (struct ui_file *file) | |
434 | { | |
435 | struct mem_file *stream = ui_file_data (file); | |
436 | ||
437 | if (stream->magic != &mem_file_magic) | |
438 | internal_error (__FILE__, __LINE__, | |
439 | _("mem_file_rewind: bad magic number")); | |
440 | stream->length_buffer = 0; | |
441 | } | |
442 | ||
443 | static void | |
444 | mem_file_put (struct ui_file *file, | |
445 | ui_file_put_method_ftype *write, | |
446 | void *dest) | |
447 | { | |
448 | struct mem_file *stream = ui_file_data (file); | |
449 | ||
450 | if (stream->magic != &mem_file_magic) | |
451 | internal_error (__FILE__, __LINE__, | |
452 | _("mem_file_put: bad magic number")); | |
453 | if (stream->length_buffer > 0) | |
454 | write (dest, stream->buffer, stream->length_buffer); | |
455 | } | |
456 | ||
457 | void | |
458 | mem_file_write (struct ui_file *file, | |
459 | const char *buffer, | |
460 | long length_buffer) | |
461 | { | |
462 | struct mem_file *stream = ui_file_data (file); | |
463 | ||
464 | if (stream->magic != &mem_file_magic) | |
465 | internal_error (__FILE__, __LINE__, | |
466 | _("mem_file_write: bad magic number")); | |
467 | if (stream->buffer == NULL) | |
468 | { | |
469 | stream->length_buffer = length_buffer; | |
470 | stream->sizeof_buffer = length_buffer; | |
471 | stream->buffer = xmalloc (stream->sizeof_buffer); | |
472 | memcpy (stream->buffer, buffer, length_buffer); | |
473 | } | |
474 | else | |
475 | { | |
476 | int new_length = stream->length_buffer + length_buffer; | |
477 | ||
478 | if (new_length >= stream->sizeof_buffer) | |
479 | { | |
480 | stream->sizeof_buffer = new_length; | |
481 | stream->buffer = xrealloc (stream->buffer, stream->sizeof_buffer); | |
482 | } | |
483 | memcpy (stream->buffer + stream->length_buffer, buffer, length_buffer); | |
484 | stream->length_buffer = new_length; | |
485 | } | |
486 | } | |
487 | \f | |
488 | /* ``struct ui_file'' implementation that maps directly onto | |
489 | <stdio.h>'s FILE. */ | |
490 | ||
491 | static ui_file_write_ftype stdio_file_write; | |
492 | static ui_file_write_async_safe_ftype stdio_file_write_async_safe; | |
493 | static ui_file_fputs_ftype stdio_file_fputs; | |
494 | static ui_file_read_ftype stdio_file_read; | |
495 | static ui_file_isatty_ftype stdio_file_isatty; | |
496 | static ui_file_delete_ftype stdio_file_delete; | |
497 | static struct ui_file *stdio_file_new (FILE *file, int close_p); | |
498 | static ui_file_flush_ftype stdio_file_flush; | |
499 | static ui_file_fseek_ftype stdio_file_fseek; | |
500 | ||
501 | static int stdio_file_magic; | |
502 | ||
503 | struct stdio_file | |
504 | { | |
505 | int *magic; | |
506 | FILE *file; | |
507 | /* The associated file descriptor is extracted ahead of time for | |
508 | stdio_file_write_async_safe's benefit, in case fileno isn't async-safe. */ | |
509 | int fd; | |
510 | int close_p; | |
511 | }; | |
512 | ||
513 | static struct ui_file * | |
514 | stdio_file_new (FILE *file, int close_p) | |
515 | { | |
516 | struct ui_file *ui_file = ui_file_new (); | |
517 | struct stdio_file *stdio = XNEW (struct stdio_file); | |
518 | ||
519 | stdio->magic = &stdio_file_magic; | |
520 | stdio->file = file; | |
521 | stdio->fd = fileno (file); | |
522 | stdio->close_p = close_p; | |
523 | set_ui_file_data (ui_file, stdio, stdio_file_delete); | |
524 | set_ui_file_flush (ui_file, stdio_file_flush); | |
525 | set_ui_file_write (ui_file, stdio_file_write); | |
526 | set_ui_file_write_async_safe (ui_file, stdio_file_write_async_safe); | |
527 | set_ui_file_fputs (ui_file, stdio_file_fputs); | |
528 | set_ui_file_read (ui_file, stdio_file_read); | |
529 | set_ui_file_isatty (ui_file, stdio_file_isatty); | |
530 | set_ui_file_fseek (ui_file, stdio_file_fseek); | |
531 | return ui_file; | |
532 | } | |
533 | ||
534 | static void | |
535 | stdio_file_delete (struct ui_file *file) | |
536 | { | |
537 | struct stdio_file *stdio = ui_file_data (file); | |
538 | ||
539 | if (stdio->magic != &stdio_file_magic) | |
540 | internal_error (__FILE__, __LINE__, | |
541 | _("stdio_file_delete: bad magic number")); | |
542 | if (stdio->close_p) | |
543 | { | |
544 | fclose (stdio->file); | |
545 | } | |
546 | xfree (stdio); | |
547 | } | |
548 | ||
549 | static void | |
550 | stdio_file_flush (struct ui_file *file) | |
551 | { | |
552 | struct stdio_file *stdio = ui_file_data (file); | |
553 | ||
554 | if (stdio->magic != &stdio_file_magic) | |
555 | internal_error (__FILE__, __LINE__, | |
556 | _("stdio_file_flush: bad magic number")); | |
557 | fflush (stdio->file); | |
558 | } | |
559 | ||
560 | static long | |
561 | stdio_file_read (struct ui_file *file, char *buf, long length_buf) | |
562 | { | |
563 | struct stdio_file *stdio = ui_file_data (file); | |
564 | ||
565 | if (stdio->magic != &stdio_file_magic) | |
566 | internal_error (__FILE__, __LINE__, | |
567 | _("stdio_file_read: bad magic number")); | |
568 | ||
569 | /* For the benefit of Windows, call gdb_select before reading from | |
570 | the file. Wait until at least one byte of data is available. | |
571 | Control-C can interrupt gdb_select, but not read. */ | |
572 | { | |
573 | fd_set readfds; | |
574 | FD_ZERO (&readfds); | |
575 | FD_SET (stdio->fd, &readfds); | |
576 | if (gdb_select (stdio->fd + 1, &readfds, NULL, NULL, NULL) == -1) | |
577 | return -1; | |
578 | } | |
579 | ||
580 | return read (stdio->fd, buf, length_buf); | |
581 | } | |
582 | ||
583 | static void | |
584 | stdio_file_write (struct ui_file *file, const char *buf, long length_buf) | |
585 | { | |
586 | struct stdio_file *stdio = ui_file_data (file); | |
587 | ||
588 | if (stdio->magic != &stdio_file_magic) | |
589 | internal_error (__FILE__, __LINE__, | |
590 | _("stdio_file_write: bad magic number")); | |
591 | /* Calling error crashes when we are called from the exception framework. */ | |
592 | if (fwrite (buf, length_buf, 1, stdio->file)) | |
593 | { | |
594 | /* Nothing. */ | |
595 | } | |
596 | } | |
597 | ||
598 | static void | |
599 | stdio_file_write_async_safe (struct ui_file *file, | |
600 | const char *buf, long length_buf) | |
601 | { | |
602 | struct stdio_file *stdio = ui_file_data (file); | |
603 | ||
604 | if (stdio->magic != &stdio_file_magic) | |
605 | { | |
606 | /* gettext isn't necessarily async safe, so we can't use _("error message") here. | |
607 | We could extract the correct translation ahead of time, but this is an extremely | |
608 | rare event, and one of the other stdio_file_* routines will presumably catch | |
609 | the problem anyway. For now keep it simple and ignore the error here. */ | |
610 | return; | |
611 | } | |
612 | ||
613 | /* This is written the way it is to avoid a warning from gcc about not using the | |
614 | result of write (since it can be declared with attribute warn_unused_result). | |
615 | Alas casting to void doesn't work for this. */ | |
616 | if (write (stdio->fd, buf, length_buf)) | |
617 | { | |
618 | /* Nothing. */ | |
619 | } | |
620 | } | |
621 | ||
622 | static void | |
623 | stdio_file_fputs (const char *linebuffer, struct ui_file *file) | |
624 | { | |
625 | struct stdio_file *stdio = ui_file_data (file); | |
626 | ||
627 | if (stdio->magic != &stdio_file_magic) | |
628 | internal_error (__FILE__, __LINE__, | |
629 | _("stdio_file_fputs: bad magic number")); | |
630 | /* Calling error crashes when we are called from the exception framework. */ | |
631 | if (fputs (linebuffer, stdio->file)) | |
632 | { | |
633 | /* Nothing. */ | |
634 | } | |
635 | } | |
636 | ||
637 | static int | |
638 | stdio_file_isatty (struct ui_file *file) | |
639 | { | |
640 | struct stdio_file *stdio = ui_file_data (file); | |
641 | ||
642 | if (stdio->magic != &stdio_file_magic) | |
643 | internal_error (__FILE__, __LINE__, | |
644 | _("stdio_file_isatty: bad magic number")); | |
645 | return (isatty (stdio->fd)); | |
646 | } | |
647 | ||
648 | static int | |
649 | stdio_file_fseek (struct ui_file *file, long offset, int whence) | |
650 | { | |
651 | struct stdio_file *stdio = ui_file_data (file); | |
652 | ||
653 | if (stdio->magic != &stdio_file_magic) | |
654 | internal_error (__FILE__, __LINE__, | |
655 | _("stdio_file_fseek: bad magic number")); | |
656 | ||
657 | return fseek (stdio->file, offset, whence); | |
658 | } | |
659 | ||
660 | #ifdef __MINGW32__ | |
661 | /* This is the implementation of ui_file method to_write for stderr. | |
662 | gdb_stdout is flushed before writing to gdb_stderr. */ | |
663 | ||
664 | static void | |
665 | stderr_file_write (struct ui_file *file, const char *buf, long length_buf) | |
666 | { | |
667 | gdb_flush (gdb_stdout); | |
668 | stdio_file_write (file, buf, length_buf); | |
669 | } | |
670 | ||
671 | /* This is the implementation of ui_file method to_fputs for stderr. | |
672 | gdb_stdout is flushed before writing to gdb_stderr. */ | |
673 | ||
674 | static void | |
675 | stderr_file_fputs (const char *linebuffer, struct ui_file *file) | |
676 | { | |
677 | gdb_flush (gdb_stdout); | |
678 | stdio_file_fputs (linebuffer, file); | |
679 | } | |
680 | #endif | |
681 | ||
682 | struct ui_file * | |
683 | stderr_fileopen (void) | |
684 | { | |
685 | struct ui_file *ui_file = stdio_fileopen (stderr); | |
686 | ||
687 | #ifdef __MINGW32__ | |
688 | /* There is no real line-buffering on Windows, see | |
689 | http://msdn.microsoft.com/en-us/library/86cebhfs%28v=vs.71%29.aspx | |
690 | so the stdout is either fully-buffered or non-buffered. We can't | |
691 | make stdout non-buffered, because of two concerns, | |
692 | 1. non-buffering hurts performance, | |
693 | 2. non-buffering may change GDB's behavior when it is interacting | |
694 | with front-end, such as Emacs. | |
695 | ||
696 | We decided to leave stdout as fully buffered, but flush it first | |
697 | when something is written to stderr. */ | |
698 | ||
699 | /* Method 'to_write_async_safe' is not overwritten, because there's | |
700 | no way to flush a stream in an async-safe manner. Fortunately, | |
701 | it doesn't really matter, because: | |
702 | - that method is only used for printing internal debug output | |
703 | from signal handlers. | |
704 | - Windows hosts don't have a concept of async-safeness. Signal | |
705 | handlers run in a separate thread, so they can call | |
706 | the regular non-async-safe output routines freely. */ | |
707 | set_ui_file_write (ui_file, stderr_file_write); | |
708 | set_ui_file_fputs (ui_file, stderr_file_fputs); | |
709 | #endif | |
710 | ||
711 | return ui_file; | |
712 | } | |
713 | ||
714 | /* Like fdopen(). Create a ui_file from a previously opened FILE. */ | |
715 | ||
716 | struct ui_file * | |
717 | stdio_fileopen (FILE *file) | |
718 | { | |
719 | return stdio_file_new (file, 0); | |
720 | } | |
721 | ||
722 | struct ui_file * | |
723 | gdb_fopen (const char *name, const char *mode) | |
724 | { | |
725 | FILE *f = gdb_fopen_cloexec (name, mode); | |
726 | ||
727 | if (f == NULL) | |
728 | return NULL; | |
729 | return stdio_file_new (f, 1); | |
730 | } | |
731 | ||
732 | /* ``struct ui_file'' implementation that maps onto two ui-file objects. */ | |
733 | ||
734 | static ui_file_write_ftype tee_file_write; | |
735 | static ui_file_fputs_ftype tee_file_fputs; | |
736 | static ui_file_isatty_ftype tee_file_isatty; | |
737 | static ui_file_delete_ftype tee_file_delete; | |
738 | static ui_file_flush_ftype tee_file_flush; | |
739 | ||
740 | static int tee_file_magic; | |
741 | ||
742 | struct tee_file | |
743 | { | |
744 | int *magic; | |
745 | struct ui_file *one, *two; | |
746 | int close_one, close_two; | |
747 | }; | |
748 | ||
749 | struct ui_file * | |
750 | tee_file_new (struct ui_file *one, int close_one, | |
751 | struct ui_file *two, int close_two) | |
752 | { | |
753 | struct ui_file *ui_file = ui_file_new (); | |
754 | struct tee_file *tee = XNEW (struct tee_file); | |
755 | ||
756 | tee->magic = &tee_file_magic; | |
757 | tee->one = one; | |
758 | tee->two = two; | |
759 | tee->close_one = close_one; | |
760 | tee->close_two = close_two; | |
761 | set_ui_file_data (ui_file, tee, tee_file_delete); | |
762 | set_ui_file_flush (ui_file, tee_file_flush); | |
763 | set_ui_file_write (ui_file, tee_file_write); | |
764 | set_ui_file_fputs (ui_file, tee_file_fputs); | |
765 | set_ui_file_isatty (ui_file, tee_file_isatty); | |
766 | return ui_file; | |
767 | } | |
768 | ||
769 | static void | |
770 | tee_file_delete (struct ui_file *file) | |
771 | { | |
772 | struct tee_file *tee = ui_file_data (file); | |
773 | ||
774 | if (tee->magic != &tee_file_magic) | |
775 | internal_error (__FILE__, __LINE__, | |
776 | _("tee_file_delete: bad magic number")); | |
777 | if (tee->close_one) | |
778 | ui_file_delete (tee->one); | |
779 | if (tee->close_two) | |
780 | ui_file_delete (tee->two); | |
781 | ||
782 | xfree (tee); | |
783 | } | |
784 | ||
785 | static void | |
786 | tee_file_flush (struct ui_file *file) | |
787 | { | |
788 | struct tee_file *tee = ui_file_data (file); | |
789 | ||
790 | if (tee->magic != &tee_file_magic) | |
791 | internal_error (__FILE__, __LINE__, | |
792 | _("tee_file_flush: bad magic number")); | |
793 | tee->one->to_flush (tee->one); | |
794 | tee->two->to_flush (tee->two); | |
795 | } | |
796 | ||
797 | static void | |
798 | tee_file_write (struct ui_file *file, const char *buf, long length_buf) | |
799 | { | |
800 | struct tee_file *tee = ui_file_data (file); | |
801 | ||
802 | if (tee->magic != &tee_file_magic) | |
803 | internal_error (__FILE__, __LINE__, | |
804 | _("tee_file_write: bad magic number")); | |
805 | ui_file_write (tee->one, buf, length_buf); | |
806 | ui_file_write (tee->two, buf, length_buf); | |
807 | } | |
808 | ||
809 | static void | |
810 | tee_file_fputs (const char *linebuffer, struct ui_file *file) | |
811 | { | |
812 | struct tee_file *tee = ui_file_data (file); | |
813 | ||
814 | if (tee->magic != &tee_file_magic) | |
815 | internal_error (__FILE__, __LINE__, | |
816 | _("tee_file_fputs: bad magic number")); | |
817 | tee->one->to_fputs (linebuffer, tee->one); | |
818 | tee->two->to_fputs (linebuffer, tee->two); | |
819 | } | |
820 | ||
821 | static int | |
822 | tee_file_isatty (struct ui_file *file) | |
823 | { | |
824 | struct tee_file *tee = ui_file_data (file); | |
825 | ||
826 | if (tee->magic != &tee_file_magic) | |
827 | internal_error (__FILE__, __LINE__, | |
828 | _("tee_file_isatty: bad magic number")); | |
829 | ||
830 | return ui_file_isatty (tee->one); | |
831 | } |