Commit | Line | Data |
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bd5635a1 | 1 | /* General utility routines for GDB, the GNU debugger. |
7919c3ed | 2 | Copyright 1986, 1989, 1990, 1991, 1992 Free Software Foundation, Inc. |
bd5635a1 RP |
3 | |
4 | This file is part of GDB. | |
5 | ||
351b221d | 6 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 7 | it under the terms of the GNU General Public License as published by |
351b221d JG |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. | |
bd5635a1 | 10 | |
351b221d | 11 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
351b221d JG |
17 | along with this program; if not, write to the Free Software |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
bd5635a1 | 19 | |
d747e0af | 20 | #include "defs.h" |
51b57ded | 21 | #if !defined(__GO32__) |
bd5635a1 RP |
22 | #include <sys/ioctl.h> |
23 | #include <sys/param.h> | |
24 | #include <pwd.h> | |
51b57ded | 25 | #endif |
2bc2e684 FF |
26 | #include <varargs.h> |
27 | #include <ctype.h> | |
28 | #include <string.h> | |
29 | ||
bd5635a1 RP |
30 | #include "signals.h" |
31 | #include "gdbcmd.h" | |
159dd2aa JK |
32 | #include "serial.h" |
33 | #if 0 | |
34 | /* No longer needed, I suspect. */ | |
bd5635a1 | 35 | #include "terminal.h" |
159dd2aa | 36 | #endif |
bd5635a1 RP |
37 | #include "bfd.h" |
38 | #include "target.h" | |
bcf2e6ab | 39 | #include "demangle.h" |
bd5d07d9 FF |
40 | #include "expression.h" |
41 | #include "language.h" | |
bd5635a1 | 42 | |
7919c3ed JG |
43 | /* Prototypes for local functions */ |
44 | ||
65ce5df4 JG |
45 | #if defined (NO_MMALLOC) || defined (NO_MMALLOC_CHECK) |
46 | #else | |
3624c875 | 47 | |
7919c3ed JG |
48 | static void |
49 | malloc_botch PARAMS ((void)); | |
3624c875 | 50 | |
65ce5df4 | 51 | #endif /* NO_MMALLOC, etc */ |
7919c3ed JG |
52 | |
53 | static void | |
54 | fatal_dump_core (); /* Can't prototype with <varargs.h> usage... */ | |
55 | ||
56 | static void | |
57 | prompt_for_continue PARAMS ((void)); | |
58 | ||
59 | static void | |
60 | set_width_command PARAMS ((char *, int, struct cmd_list_element *)); | |
61 | ||
bd5635a1 RP |
62 | /* If this definition isn't overridden by the header files, assume |
63 | that isatty and fileno exist on this system. */ | |
64 | #ifndef ISATTY | |
65 | #define ISATTY(FP) (isatty (fileno (FP))) | |
66 | #endif | |
67 | ||
bd5635a1 RP |
68 | /* Chain of cleanup actions established with make_cleanup, |
69 | to be executed if an error happens. */ | |
70 | ||
71 | static struct cleanup *cleanup_chain; | |
72 | ||
73 | /* Nonzero means a quit has been requested. */ | |
74 | ||
75 | int quit_flag; | |
76 | ||
159dd2aa JK |
77 | /* Nonzero means quit immediately if Control-C is typed now, rather |
78 | than waiting until QUIT is executed. Be careful in setting this; | |
79 | code which executes with immediate_quit set has to be very careful | |
80 | about being able to deal with being interrupted at any time. It is | |
81 | almost always better to use QUIT; the only exception I can think of | |
82 | is being able to quit out of a system call (using EINTR loses if | |
83 | the SIGINT happens between the previous QUIT and the system call). | |
84 | To immediately quit in the case in which a SIGINT happens between | |
85 | the previous QUIT and setting immediate_quit (desirable anytime we | |
86 | expect to block), call QUIT after setting immediate_quit. */ | |
bd5635a1 RP |
87 | |
88 | int immediate_quit; | |
89 | ||
90 | /* Nonzero means that encoded C++ names should be printed out in their | |
91 | C++ form rather than raw. */ | |
92 | ||
93 | int demangle = 1; | |
94 | ||
95 | /* Nonzero means that encoded C++ names should be printed out in their | |
96 | C++ form even in assembler language displays. If this is set, but | |
97 | DEMANGLE is zero, names are printed raw, i.e. DEMANGLE controls. */ | |
98 | ||
99 | int asm_demangle = 0; | |
100 | ||
101 | /* Nonzero means that strings with character values >0x7F should be printed | |
102 | as octal escapes. Zero means just print the value (e.g. it's an | |
103 | international character, and the terminal or window can cope.) */ | |
104 | ||
105 | int sevenbit_strings = 0; | |
81066208 JG |
106 | |
107 | /* String to be printed before error messages, if any. */ | |
108 | ||
109 | char *error_pre_print; | |
3624c875 | 110 | char *warning_pre_print = "\nwarning: "; |
bd5635a1 RP |
111 | \f |
112 | /* Add a new cleanup to the cleanup_chain, | |
113 | and return the previous chain pointer | |
114 | to be passed later to do_cleanups or discard_cleanups. | |
115 | Args are FUNCTION to clean up with, and ARG to pass to it. */ | |
116 | ||
117 | struct cleanup * | |
118 | make_cleanup (function, arg) | |
7919c3ed JG |
119 | void (*function) PARAMS ((PTR)); |
120 | PTR arg; | |
bd5635a1 RP |
121 | { |
122 | register struct cleanup *new | |
123 | = (struct cleanup *) xmalloc (sizeof (struct cleanup)); | |
124 | register struct cleanup *old_chain = cleanup_chain; | |
125 | ||
126 | new->next = cleanup_chain; | |
127 | new->function = function; | |
128 | new->arg = arg; | |
129 | cleanup_chain = new; | |
130 | ||
131 | return old_chain; | |
132 | } | |
133 | ||
134 | /* Discard cleanups and do the actions they describe | |
135 | until we get back to the point OLD_CHAIN in the cleanup_chain. */ | |
136 | ||
137 | void | |
138 | do_cleanups (old_chain) | |
139 | register struct cleanup *old_chain; | |
140 | { | |
141 | register struct cleanup *ptr; | |
142 | while ((ptr = cleanup_chain) != old_chain) | |
143 | { | |
5e5215eb | 144 | cleanup_chain = ptr->next; /* Do this first incase recursion */ |
bd5635a1 | 145 | (*ptr->function) (ptr->arg); |
bd5635a1 RP |
146 | free (ptr); |
147 | } | |
148 | } | |
149 | ||
150 | /* Discard cleanups, not doing the actions they describe, | |
151 | until we get back to the point OLD_CHAIN in the cleanup_chain. */ | |
152 | ||
153 | void | |
154 | discard_cleanups (old_chain) | |
155 | register struct cleanup *old_chain; | |
156 | { | |
157 | register struct cleanup *ptr; | |
158 | while ((ptr = cleanup_chain) != old_chain) | |
159 | { | |
160 | cleanup_chain = ptr->next; | |
be772100 | 161 | free ((PTR)ptr); |
bd5635a1 RP |
162 | } |
163 | } | |
164 | ||
165 | /* Set the cleanup_chain to 0, and return the old cleanup chain. */ | |
166 | struct cleanup * | |
167 | save_cleanups () | |
168 | { | |
169 | struct cleanup *old_chain = cleanup_chain; | |
170 | ||
171 | cleanup_chain = 0; | |
172 | return old_chain; | |
173 | } | |
174 | ||
175 | /* Restore the cleanup chain from a previously saved chain. */ | |
176 | void | |
177 | restore_cleanups (chain) | |
178 | struct cleanup *chain; | |
179 | { | |
180 | cleanup_chain = chain; | |
181 | } | |
182 | ||
183 | /* This function is useful for cleanups. | |
184 | Do | |
185 | ||
186 | foo = xmalloc (...); | |
187 | old_chain = make_cleanup (free_current_contents, &foo); | |
188 | ||
189 | to arrange to free the object thus allocated. */ | |
190 | ||
191 | void | |
192 | free_current_contents (location) | |
193 | char **location; | |
194 | { | |
195 | free (*location); | |
196 | } | |
088c3a0b JG |
197 | |
198 | /* Provide a known function that does nothing, to use as a base for | |
199 | for a possibly long chain of cleanups. This is useful where we | |
200 | use the cleanup chain for handling normal cleanups as well as dealing | |
201 | with cleanups that need to be done as a result of a call to error(). | |
202 | In such cases, we may not be certain where the first cleanup is, unless | |
203 | we have a do-nothing one to always use as the base. */ | |
204 | ||
205 | /* ARGSUSED */ | |
206 | void | |
207 | null_cleanup (arg) | |
208 | char **arg; | |
209 | { | |
210 | } | |
211 | ||
bd5635a1 | 212 | \f |
2bc2e684 FF |
213 | /* Provide a hook for modules wishing to print their own warning messages |
214 | to set up the terminal state in a compatible way, without them having | |
215 | to import all the target_<...> macros. */ | |
216 | ||
217 | void | |
218 | warning_setup () | |
219 | { | |
220 | target_terminal_ours (); | |
221 | wrap_here(""); /* Force out any buffered output */ | |
222 | fflush (stdout); | |
223 | } | |
224 | ||
225 | /* Print a warning message. | |
226 | The first argument STRING is the warning message, used as a fprintf string, | |
227 | and the remaining args are passed as arguments to it. | |
228 | The primary difference between warnings and errors is that a warning | |
229 | does not force the return to command level. */ | |
230 | ||
231 | /* VARARGS */ | |
232 | void | |
233 | warning (va_alist) | |
234 | va_dcl | |
235 | { | |
236 | va_list args; | |
237 | char *string; | |
238 | ||
239 | va_start (args); | |
240 | target_terminal_ours (); | |
241 | wrap_here(""); /* Force out any buffered output */ | |
242 | fflush (stdout); | |
243 | if (warning_pre_print) | |
244 | fprintf (stderr, warning_pre_print); | |
245 | string = va_arg (args, char *); | |
246 | vfprintf (stderr, string, args); | |
247 | fprintf (stderr, "\n"); | |
248 | va_end (args); | |
249 | } | |
250 | ||
bd5635a1 RP |
251 | /* Print an error message and return to command level. |
252 | The first argument STRING is the error message, used as a fprintf string, | |
253 | and the remaining args are passed as arguments to it. */ | |
254 | ||
255 | /* VARARGS */ | |
7919c3ed | 256 | NORETURN void |
bd5635a1 RP |
257 | error (va_alist) |
258 | va_dcl | |
259 | { | |
260 | va_list args; | |
261 | char *string; | |
262 | ||
263 | va_start (args); | |
264 | target_terminal_ours (); | |
2bc2e684 | 265 | wrap_here(""); /* Force out any buffered output */ |
bd5635a1 | 266 | fflush (stdout); |
81066208 | 267 | if (error_pre_print) |
bcf2e6ab | 268 | fprintf_filtered (stderr, error_pre_print); |
bd5635a1 | 269 | string = va_arg (args, char *); |
bcf2e6ab SG |
270 | vfprintf_filtered (stderr, string, args); |
271 | fprintf_filtered (stderr, "\n"); | |
bd5635a1 | 272 | va_end (args); |
159dd2aa | 273 | return_to_top_level (RETURN_ERROR); |
bd5635a1 RP |
274 | } |
275 | ||
276 | /* Print an error message and exit reporting failure. | |
277 | This is for a error that we cannot continue from. | |
7919c3ed JG |
278 | The arguments are printed a la printf. |
279 | ||
280 | This function cannot be declared volatile (NORETURN) in an | |
281 | ANSI environment because exit() is not declared volatile. */ | |
bd5635a1 RP |
282 | |
283 | /* VARARGS */ | |
7919c3ed | 284 | NORETURN void |
bd5635a1 RP |
285 | fatal (va_alist) |
286 | va_dcl | |
287 | { | |
288 | va_list args; | |
289 | char *string; | |
290 | ||
291 | va_start (args); | |
292 | string = va_arg (args, char *); | |
3624c875 | 293 | fprintf (stderr, "\ngdb: "); |
bd5635a1 RP |
294 | vfprintf (stderr, string, args); |
295 | fprintf (stderr, "\n"); | |
296 | va_end (args); | |
297 | exit (1); | |
298 | } | |
299 | ||
300 | /* Print an error message and exit, dumping core. | |
301 | The arguments are printed a la printf (). */ | |
7919c3ed | 302 | |
bd5635a1 | 303 | /* VARARGS */ |
7919c3ed | 304 | static void |
bd5635a1 RP |
305 | fatal_dump_core (va_alist) |
306 | va_dcl | |
307 | { | |
308 | va_list args; | |
309 | char *string; | |
310 | ||
311 | va_start (args); | |
312 | string = va_arg (args, char *); | |
313 | /* "internal error" is always correct, since GDB should never dump | |
314 | core, no matter what the input. */ | |
3624c875 | 315 | fprintf (stderr, "\ngdb internal error: "); |
bd5635a1 RP |
316 | vfprintf (stderr, string, args); |
317 | fprintf (stderr, "\n"); | |
318 | va_end (args); | |
319 | ||
320 | signal (SIGQUIT, SIG_DFL); | |
321 | kill (getpid (), SIGQUIT); | |
322 | /* We should never get here, but just in case... */ | |
323 | exit (1); | |
324 | } | |
7919c3ed | 325 | |
4ace50a5 FF |
326 | /* The strerror() function can return NULL for errno values that are |
327 | out of range. Provide a "safe" version that always returns a | |
328 | printable string. */ | |
329 | ||
330 | char * | |
331 | safe_strerror (errnum) | |
332 | int errnum; | |
333 | { | |
334 | char *msg; | |
335 | static char buf[32]; | |
336 | ||
337 | if ((msg = strerror (errnum)) == NULL) | |
338 | { | |
339 | sprintf (buf, "(undocumented errno %d)", errnum); | |
340 | msg = buf; | |
341 | } | |
342 | return (msg); | |
343 | } | |
344 | ||
345 | /* The strsignal() function can return NULL for signal values that are | |
346 | out of range. Provide a "safe" version that always returns a | |
347 | printable string. */ | |
348 | ||
349 | char * | |
350 | safe_strsignal (signo) | |
351 | int signo; | |
352 | { | |
353 | char *msg; | |
354 | static char buf[32]; | |
355 | ||
356 | if ((msg = strsignal (signo)) == NULL) | |
357 | { | |
358 | sprintf (buf, "(undocumented signal %d)", signo); | |
359 | msg = buf; | |
360 | } | |
361 | return (msg); | |
362 | } | |
363 | ||
364 | ||
bd5635a1 RP |
365 | /* Print the system error message for errno, and also mention STRING |
366 | as the file name for which the error was encountered. | |
367 | Then return to command level. */ | |
368 | ||
369 | void | |
370 | perror_with_name (string) | |
371 | char *string; | |
372 | { | |
bd5635a1 RP |
373 | char *err; |
374 | char *combined; | |
375 | ||
4ace50a5 | 376 | err = safe_strerror (errno); |
bd5635a1 RP |
377 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); |
378 | strcpy (combined, string); | |
379 | strcat (combined, ": "); | |
380 | strcat (combined, err); | |
381 | ||
382 | /* I understand setting these is a matter of taste. Still, some people | |
383 | may clear errno but not know about bfd_error. Doing this here is not | |
384 | unreasonable. */ | |
385 | bfd_error = no_error; | |
386 | errno = 0; | |
387 | ||
388 | error ("%s.", combined); | |
389 | } | |
390 | ||
391 | /* Print the system error message for ERRCODE, and also mention STRING | |
392 | as the file name for which the error was encountered. */ | |
393 | ||
394 | void | |
395 | print_sys_errmsg (string, errcode) | |
396 | char *string; | |
397 | int errcode; | |
398 | { | |
bd5635a1 RP |
399 | char *err; |
400 | char *combined; | |
401 | ||
4ace50a5 | 402 | err = safe_strerror (errcode); |
bd5635a1 RP |
403 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); |
404 | strcpy (combined, string); | |
405 | strcat (combined, ": "); | |
406 | strcat (combined, err); | |
407 | ||
bcf2e6ab | 408 | fprintf (stderr, "%s.\n", combined); |
bd5635a1 RP |
409 | } |
410 | ||
411 | /* Control C eventually causes this to be called, at a convenient time. */ | |
412 | ||
413 | void | |
414 | quit () | |
415 | { | |
159dd2aa JK |
416 | serial_t stdout_serial = serial_fdopen (1); |
417 | ||
bd5635a1 | 418 | target_terminal_ours (); |
d11c44f1 | 419 | wrap_here ((char *)0); /* Force out any pending output */ |
159dd2aa JK |
420 | |
421 | SERIAL_FLUSH_OUTPUT (stdout_serial); | |
422 | ||
423 | SERIAL_UN_FDOPEN (stdout_serial); | |
424 | ||
425 | /* Don't use *_filtered; we don't want to prompt the user to continue. */ | |
426 | if (error_pre_print) | |
427 | fprintf (stderr, error_pre_print); | |
428 | ||
429 | if (job_control | |
430 | /* If there is no terminal switching for this target, then we can't | |
431 | possibly get screwed by the lack of job control. */ | |
432 | || current_target->to_terminal_ours == NULL) | |
433 | fprintf (stderr, "Quit\n"); | |
434 | else | |
435 | fprintf (stderr, | |
436 | "Quit (expect signal SIGINT when the program is resumed)\n"); | |
437 | return_to_top_level (RETURN_QUIT); | |
bd5635a1 RP |
438 | } |
439 | ||
bd5d07d9 FF |
440 | |
441 | #ifdef __GO32__ | |
442 | ||
443 | /* In the absence of signals, poll keyboard for a quit. | |
444 | Called from #define QUIT pollquit() in xm-go32.h. */ | |
445 | ||
446 | void | |
447 | pollquit() | |
448 | { | |
449 | if (kbhit ()) | |
450 | { | |
451 | int k = getkey (); | |
452 | if (k == 1) | |
453 | quit_flag = 1; | |
454 | else if (k == 2) | |
455 | immediate_quit = 1; | |
456 | quit (); | |
457 | } | |
458 | } | |
459 | ||
460 | #endif | |
461 | ||
bd5635a1 RP |
462 | /* Control C comes here */ |
463 | ||
464 | void | |
088c3a0b JG |
465 | request_quit (signo) |
466 | int signo; | |
bd5635a1 RP |
467 | { |
468 | quit_flag = 1; | |
469 | ||
470 | #ifdef USG | |
471 | /* Restore the signal handler. */ | |
088c3a0b | 472 | signal (signo, request_quit); |
bd5635a1 RP |
473 | #endif |
474 | ||
475 | if (immediate_quit) | |
476 | quit (); | |
477 | } | |
3624c875 FF |
478 | |
479 | \f | |
480 | /* Memory management stuff (malloc friends). */ | |
481 | ||
482 | #if defined (NO_MMALLOC) | |
483 | ||
484 | PTR | |
485 | mmalloc (md, size) | |
486 | PTR md; | |
487 | long size; | |
488 | { | |
489 | return (malloc (size)); | |
490 | } | |
491 | ||
492 | PTR | |
493 | mrealloc (md, ptr, size) | |
494 | PTR md; | |
495 | PTR ptr; | |
496 | long size; | |
497 | { | |
4ace50a5 FF |
498 | if (ptr == 0) /* Guard against old realloc's */ |
499 | return malloc (size); | |
500 | else | |
501 | return realloc (ptr, size); | |
3624c875 FF |
502 | } |
503 | ||
504 | void | |
505 | mfree (md, ptr) | |
506 | PTR md; | |
507 | PTR ptr; | |
508 | { | |
509 | free (ptr); | |
510 | } | |
511 | ||
512 | #endif /* NO_MMALLOC */ | |
513 | ||
514 | #if defined (NO_MMALLOC) || defined (NO_MMALLOC_CHECK) | |
515 | ||
516 | void | |
517 | init_malloc (md) | |
518 | PTR md; | |
519 | { | |
520 | } | |
521 | ||
522 | #else /* have mmalloc and want corruption checking */ | |
523 | ||
524 | static void | |
525 | malloc_botch () | |
526 | { | |
527 | fatal_dump_core ("Memory corruption"); | |
528 | } | |
529 | ||
530 | /* Attempt to install hooks in mmalloc/mrealloc/mfree for the heap specified | |
531 | by MD, to detect memory corruption. Note that MD may be NULL to specify | |
532 | the default heap that grows via sbrk. | |
533 | ||
534 | Note that for freshly created regions, we must call mmcheck prior to any | |
535 | mallocs in the region. Otherwise, any region which was allocated prior to | |
536 | installing the checking hooks, which is later reallocated or freed, will | |
537 | fail the checks! The mmcheck function only allows initial hooks to be | |
538 | installed before the first mmalloc. However, anytime after we have called | |
539 | mmcheck the first time to install the checking hooks, we can call it again | |
540 | to update the function pointer to the memory corruption handler. | |
541 | ||
542 | Returns zero on failure, non-zero on success. */ | |
543 | ||
544 | void | |
545 | init_malloc (md) | |
546 | PTR md; | |
547 | { | |
548 | if (!mmcheck (md, malloc_botch)) | |
549 | { | |
550 | warning ("internal error: failed to install memory consistency checks"); | |
551 | } | |
552 | ||
4ed3a9ea | 553 | mmtrace (); |
3624c875 FF |
554 | } |
555 | ||
556 | #endif /* Have mmalloc and want corruption checking */ | |
557 | ||
558 | /* Called when a memory allocation fails, with the number of bytes of | |
559 | memory requested in SIZE. */ | |
560 | ||
561 | NORETURN void | |
562 | nomem (size) | |
563 | long size; | |
564 | { | |
565 | if (size > 0) | |
566 | { | |
567 | fatal ("virtual memory exhausted: can't allocate %ld bytes.", size); | |
568 | } | |
569 | else | |
570 | { | |
571 | fatal ("virtual memory exhausted."); | |
572 | } | |
573 | } | |
574 | ||
575 | /* Like mmalloc but get error if no storage available, and protect against | |
576 | the caller wanting to allocate zero bytes. Whether to return NULL for | |
577 | a zero byte request, or translate the request into a request for one | |
578 | byte of zero'd storage, is a religious issue. */ | |
579 | ||
580 | PTR | |
581 | xmmalloc (md, size) | |
582 | PTR md; | |
583 | long size; | |
584 | { | |
585 | register PTR val; | |
586 | ||
587 | if (size == 0) | |
588 | { | |
589 | val = NULL; | |
590 | } | |
591 | else if ((val = mmalloc (md, size)) == NULL) | |
592 | { | |
593 | nomem (size); | |
594 | } | |
595 | return (val); | |
596 | } | |
597 | ||
598 | /* Like mrealloc but get error if no storage available. */ | |
599 | ||
600 | PTR | |
601 | xmrealloc (md, ptr, size) | |
602 | PTR md; | |
603 | PTR ptr; | |
604 | long size; | |
605 | { | |
606 | register PTR val; | |
607 | ||
608 | if (ptr != NULL) | |
609 | { | |
610 | val = mrealloc (md, ptr, size); | |
611 | } | |
612 | else | |
613 | { | |
614 | val = mmalloc (md, size); | |
615 | } | |
616 | if (val == NULL) | |
617 | { | |
618 | nomem (size); | |
619 | } | |
620 | return (val); | |
621 | } | |
622 | ||
623 | /* Like malloc but get error if no storage available, and protect against | |
624 | the caller wanting to allocate zero bytes. */ | |
625 | ||
626 | PTR | |
627 | xmalloc (size) | |
628 | long size; | |
629 | { | |
630 | return (xmmalloc ((void *) NULL, size)); | |
631 | } | |
632 | ||
633 | /* Like mrealloc but get error if no storage available. */ | |
634 | ||
635 | PTR | |
636 | xrealloc (ptr, size) | |
637 | PTR ptr; | |
638 | long size; | |
639 | { | |
640 | return (xmrealloc ((void *) NULL, ptr, size)); | |
641 | } | |
642 | ||
bd5635a1 RP |
643 | \f |
644 | /* My replacement for the read system call. | |
645 | Used like `read' but keeps going if `read' returns too soon. */ | |
646 | ||
647 | int | |
648 | myread (desc, addr, len) | |
649 | int desc; | |
650 | char *addr; | |
651 | int len; | |
652 | { | |
653 | register int val; | |
654 | int orglen = len; | |
655 | ||
656 | while (len > 0) | |
657 | { | |
658 | val = read (desc, addr, len); | |
659 | if (val < 0) | |
660 | return val; | |
661 | if (val == 0) | |
662 | return orglen - len; | |
663 | len -= val; | |
664 | addr += val; | |
665 | } | |
666 | return orglen; | |
667 | } | |
668 | \f | |
669 | /* Make a copy of the string at PTR with SIZE characters | |
670 | (and add a null character at the end in the copy). | |
671 | Uses malloc to get the space. Returns the address of the copy. */ | |
672 | ||
673 | char * | |
674 | savestring (ptr, size) | |
088c3a0b | 675 | const char *ptr; |
bd5635a1 RP |
676 | int size; |
677 | { | |
678 | register char *p = (char *) xmalloc (size + 1); | |
4ed3a9ea | 679 | memcpy (p, ptr, size); |
bd5635a1 RP |
680 | p[size] = 0; |
681 | return p; | |
682 | } | |
683 | ||
3624c875 FF |
684 | char * |
685 | msavestring (md, ptr, size) | |
686 | void *md; | |
687 | const char *ptr; | |
688 | int size; | |
689 | { | |
690 | register char *p = (char *) xmmalloc (md, size + 1); | |
4ed3a9ea | 691 | memcpy (p, ptr, size); |
3624c875 FF |
692 | p[size] = 0; |
693 | return p; | |
694 | } | |
695 | ||
8aa13b87 JK |
696 | /* The "const" is so it compiles under DGUX (which prototypes strsave |
697 | in <string.h>. FIXME: This should be named "xstrsave", shouldn't it? | |
698 | Doesn't real strsave return NULL if out of memory? */ | |
bd5635a1 RP |
699 | char * |
700 | strsave (ptr) | |
8aa13b87 | 701 | const char *ptr; |
bd5635a1 RP |
702 | { |
703 | return savestring (ptr, strlen (ptr)); | |
704 | } | |
705 | ||
3624c875 FF |
706 | char * |
707 | mstrsave (md, ptr) | |
708 | void *md; | |
709 | const char *ptr; | |
710 | { | |
711 | return (msavestring (md, ptr, strlen (ptr))); | |
712 | } | |
713 | ||
bd5635a1 RP |
714 | void |
715 | print_spaces (n, file) | |
716 | register int n; | |
717 | register FILE *file; | |
718 | { | |
719 | while (n-- > 0) | |
720 | fputc (' ', file); | |
721 | } | |
722 | ||
723 | /* Ask user a y-or-n question and return 1 iff answer is yes. | |
724 | Takes three args which are given to printf to print the question. | |
725 | The first, a control string, should end in "? ". | |
726 | It should not say how to answer, because we do that. */ | |
727 | ||
728 | /* VARARGS */ | |
729 | int | |
730 | query (va_alist) | |
731 | va_dcl | |
732 | { | |
733 | va_list args; | |
734 | char *ctlstr; | |
735 | register int answer; | |
736 | register int ans2; | |
737 | ||
738 | /* Automatically answer "yes" if input is not from a terminal. */ | |
739 | if (!input_from_terminal_p ()) | |
740 | return 1; | |
741 | ||
742 | while (1) | |
743 | { | |
546014f7 PB |
744 | wrap_here (""); /* Flush any buffered output */ |
745 | fflush (stdout); | |
bd5635a1 RP |
746 | va_start (args); |
747 | ctlstr = va_arg (args, char *); | |
bcf2e6ab | 748 | vfprintf_filtered (stdout, ctlstr, args); |
b36e3a9b | 749 | va_end (args); |
bcf2e6ab | 750 | printf_filtered ("(y or n) "); |
b36e3a9b SG |
751 | fflush (stdout); |
752 | answer = fgetc (stdin); | |
753 | clearerr (stdin); /* in case of C-d */ | |
754 | if (answer == EOF) /* C-d */ | |
755 | return 1; | |
756 | if (answer != '\n') /* Eat rest of input line, to EOF or newline */ | |
757 | do | |
758 | { | |
759 | ans2 = fgetc (stdin); | |
760 | clearerr (stdin); | |
761 | } | |
762 | while (ans2 != EOF && ans2 != '\n'); | |
bd5635a1 RP |
763 | if (answer >= 'a') |
764 | answer -= 040; | |
765 | if (answer == 'Y') | |
766 | return 1; | |
767 | if (answer == 'N') | |
768 | return 0; | |
bcf2e6ab | 769 | printf_filtered ("Please answer y or n.\n"); |
bd5635a1 RP |
770 | } |
771 | } | |
7919c3ed | 772 | |
bd5635a1 RP |
773 | \f |
774 | /* Parse a C escape sequence. STRING_PTR points to a variable | |
775 | containing a pointer to the string to parse. That pointer | |
776 | should point to the character after the \. That pointer | |
777 | is updated past the characters we use. The value of the | |
778 | escape sequence is returned. | |
779 | ||
780 | A negative value means the sequence \ newline was seen, | |
781 | which is supposed to be equivalent to nothing at all. | |
782 | ||
783 | If \ is followed by a null character, we return a negative | |
784 | value and leave the string pointer pointing at the null character. | |
785 | ||
786 | If \ is followed by 000, we return 0 and leave the string pointer | |
787 | after the zeros. A value of 0 does not mean end of string. */ | |
788 | ||
789 | int | |
790 | parse_escape (string_ptr) | |
791 | char **string_ptr; | |
792 | { | |
793 | register int c = *(*string_ptr)++; | |
794 | switch (c) | |
795 | { | |
796 | case 'a': | |
2bc2e684 | 797 | return 007; /* Bell (alert) char */ |
bd5635a1 RP |
798 | case 'b': |
799 | return '\b'; | |
2bc2e684 | 800 | case 'e': /* Escape character */ |
bd5635a1 RP |
801 | return 033; |
802 | case 'f': | |
803 | return '\f'; | |
804 | case 'n': | |
805 | return '\n'; | |
806 | case 'r': | |
807 | return '\r'; | |
808 | case 't': | |
809 | return '\t'; | |
810 | case 'v': | |
811 | return '\v'; | |
812 | case '\n': | |
813 | return -2; | |
814 | case 0: | |
815 | (*string_ptr)--; | |
816 | return 0; | |
817 | case '^': | |
818 | c = *(*string_ptr)++; | |
819 | if (c == '\\') | |
820 | c = parse_escape (string_ptr); | |
821 | if (c == '?') | |
822 | return 0177; | |
823 | return (c & 0200) | (c & 037); | |
824 | ||
825 | case '0': | |
826 | case '1': | |
827 | case '2': | |
828 | case '3': | |
829 | case '4': | |
830 | case '5': | |
831 | case '6': | |
832 | case '7': | |
833 | { | |
834 | register int i = c - '0'; | |
835 | register int count = 0; | |
836 | while (++count < 3) | |
837 | { | |
838 | if ((c = *(*string_ptr)++) >= '0' && c <= '7') | |
839 | { | |
840 | i *= 8; | |
841 | i += c - '0'; | |
842 | } | |
843 | else | |
844 | { | |
845 | (*string_ptr)--; | |
846 | break; | |
847 | } | |
848 | } | |
849 | return i; | |
850 | } | |
851 | default: | |
852 | return c; | |
853 | } | |
854 | } | |
855 | \f | |
51b80b00 FF |
856 | /* Print the character C on STREAM as part of the contents of a literal |
857 | string whose delimiter is QUOTER. Note that this routine should only | |
858 | be call for printing things which are independent of the language | |
859 | of the program being debugged. */ | |
bd5635a1 RP |
860 | |
861 | void | |
51b80b00 | 862 | gdb_printchar (c, stream, quoter) |
088c3a0b | 863 | register int c; |
bd5635a1 RP |
864 | FILE *stream; |
865 | int quoter; | |
866 | { | |
bd5635a1 | 867 | |
7e7e2d40 JG |
868 | c &= 0xFF; /* Avoid sign bit follies */ |
869 | ||
fcdb113e JG |
870 | if ( c < 0x20 || /* Low control chars */ |
871 | (c >= 0x7F && c < 0xA0) || /* DEL, High controls */ | |
872 | (sevenbit_strings && c >= 0x80)) { /* high order bit set */ | |
bd5635a1 RP |
873 | switch (c) |
874 | { | |
875 | case '\n': | |
876 | fputs_filtered ("\\n", stream); | |
877 | break; | |
878 | case '\b': | |
879 | fputs_filtered ("\\b", stream); | |
880 | break; | |
881 | case '\t': | |
882 | fputs_filtered ("\\t", stream); | |
883 | break; | |
884 | case '\f': | |
885 | fputs_filtered ("\\f", stream); | |
886 | break; | |
887 | case '\r': | |
888 | fputs_filtered ("\\r", stream); | |
889 | break; | |
890 | case '\033': | |
891 | fputs_filtered ("\\e", stream); | |
892 | break; | |
893 | case '\007': | |
894 | fputs_filtered ("\\a", stream); | |
895 | break; | |
896 | default: | |
897 | fprintf_filtered (stream, "\\%.3o", (unsigned int) c); | |
898 | break; | |
899 | } | |
2bc2e684 FF |
900 | } else { |
901 | if (c == '\\' || c == quoter) | |
902 | fputs_filtered ("\\", stream); | |
903 | fprintf_filtered (stream, "%c", c); | |
904 | } | |
bd5635a1 RP |
905 | } |
906 | \f | |
907 | /* Number of lines per page or UINT_MAX if paging is disabled. */ | |
908 | static unsigned int lines_per_page; | |
909 | /* Number of chars per line or UNIT_MAX is line folding is disabled. */ | |
910 | static unsigned int chars_per_line; | |
911 | /* Current count of lines printed on this page, chars on this line. */ | |
912 | static unsigned int lines_printed, chars_printed; | |
913 | ||
914 | /* Buffer and start column of buffered text, for doing smarter word- | |
915 | wrapping. When someone calls wrap_here(), we start buffering output | |
916 | that comes through fputs_filtered(). If we see a newline, we just | |
917 | spit it out and forget about the wrap_here(). If we see another | |
918 | wrap_here(), we spit it out and remember the newer one. If we see | |
919 | the end of the line, we spit out a newline, the indent, and then | |
159dd2aa JK |
920 | the buffered output. */ |
921 | ||
922 | /* Malloc'd buffer with chars_per_line+2 bytes. Contains characters which | |
923 | are waiting to be output (they have already been counted in chars_printed). | |
924 | When wrap_buffer[0] is null, the buffer is empty. */ | |
925 | static char *wrap_buffer; | |
bd5635a1 | 926 | |
159dd2aa JK |
927 | /* Pointer in wrap_buffer to the next character to fill. */ |
928 | static char *wrap_pointer; | |
bd5635a1 | 929 | |
159dd2aa JK |
930 | /* String to indent by if the wrap occurs. Must not be NULL if wrap_column |
931 | is non-zero. */ | |
932 | static char *wrap_indent; | |
933 | ||
934 | /* Column number on the screen where wrap_buffer begins, or 0 if wrapping | |
935 | is not in effect. */ | |
bd5635a1 RP |
936 | static int wrap_column; |
937 | ||
e1ce8aa5 | 938 | /* ARGSUSED */ |
bd5635a1 RP |
939 | static void |
940 | set_width_command (args, from_tty, c) | |
941 | char *args; | |
942 | int from_tty; | |
943 | struct cmd_list_element *c; | |
944 | { | |
945 | if (!wrap_buffer) | |
946 | { | |
947 | wrap_buffer = (char *) xmalloc (chars_per_line + 2); | |
948 | wrap_buffer[0] = '\0'; | |
949 | } | |
950 | else | |
951 | wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2); | |
952 | wrap_pointer = wrap_buffer; /* Start it at the beginning */ | |
953 | } | |
954 | ||
d974236f JG |
955 | /* Wait, so the user can read what's on the screen. Prompt the user |
956 | to continue by pressing RETURN. */ | |
957 | ||
bd5635a1 RP |
958 | static void |
959 | prompt_for_continue () | |
960 | { | |
351b221d JG |
961 | char *ignore; |
962 | ||
d974236f JG |
963 | /* We must do this *before* we call gdb_readline, else it will eventually |
964 | call us -- thinking that we're trying to print beyond the end of the | |
965 | screen. */ | |
966 | reinitialize_more_filter (); | |
967 | ||
bd5635a1 | 968 | immediate_quit++; |
159dd2aa JK |
969 | /* On a real operating system, the user can quit with SIGINT. |
970 | But not on GO32. | |
971 | ||
972 | 'q' is provided on all systems so users don't have to change habits | |
973 | from system to system, and because telling them what to do in | |
974 | the prompt is more user-friendly than expecting them to think of | |
975 | SIGINT. */ | |
976 | ignore = | |
977 | gdb_readline ("---Type <return> to continue, or q <return> to quit---"); | |
351b221d | 978 | if (ignore) |
159dd2aa JK |
979 | { |
980 | char *p = ignore; | |
981 | while (*p == ' ' || *p == '\t') | |
982 | ++p; | |
983 | if (p[0] == 'q') | |
984 | request_quit (SIGINT); | |
985 | free (ignore); | |
986 | } | |
bd5635a1 | 987 | immediate_quit--; |
d974236f JG |
988 | |
989 | /* Now we have to do this again, so that GDB will know that it doesn't | |
990 | need to save the ---Type <return>--- line at the top of the screen. */ | |
991 | reinitialize_more_filter (); | |
992 | ||
351b221d | 993 | dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */ |
bd5635a1 RP |
994 | } |
995 | ||
996 | /* Reinitialize filter; ie. tell it to reset to original values. */ | |
997 | ||
998 | void | |
999 | reinitialize_more_filter () | |
1000 | { | |
1001 | lines_printed = 0; | |
1002 | chars_printed = 0; | |
1003 | } | |
1004 | ||
1005 | /* Indicate that if the next sequence of characters overflows the line, | |
1006 | a newline should be inserted here rather than when it hits the end. | |
159dd2aa | 1007 | If INDENT is non-null, it is a string to be printed to indent the |
bd5635a1 RP |
1008 | wrapped part on the next line. INDENT must remain accessible until |
1009 | the next call to wrap_here() or until a newline is printed through | |
1010 | fputs_filtered(). | |
1011 | ||
1012 | If the line is already overfull, we immediately print a newline and | |
1013 | the indentation, and disable further wrapping. | |
1014 | ||
2bc2e684 FF |
1015 | If we don't know the width of lines, but we know the page height, |
1016 | we must not wrap words, but should still keep track of newlines | |
1017 | that were explicitly printed. | |
1018 | ||
159dd2aa JK |
1019 | INDENT should not contain tabs, as that will mess up the char count |
1020 | on the next line. FIXME. | |
1021 | ||
1022 | This routine is guaranteed to force out any output which has been | |
1023 | squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be | |
1024 | used to force out output from the wrap_buffer. */ | |
bd5635a1 RP |
1025 | |
1026 | void | |
1027 | wrap_here(indent) | |
159dd2aa | 1028 | char *indent; |
bd5635a1 RP |
1029 | { |
1030 | if (wrap_buffer[0]) | |
1031 | { | |
1032 | *wrap_pointer = '\0'; | |
1033 | fputs (wrap_buffer, stdout); | |
1034 | } | |
1035 | wrap_pointer = wrap_buffer; | |
1036 | wrap_buffer[0] = '\0'; | |
2bc2e684 FF |
1037 | if (chars_per_line == UINT_MAX) /* No line overflow checking */ |
1038 | { | |
1039 | wrap_column = 0; | |
1040 | } | |
1041 | else if (chars_printed >= chars_per_line) | |
bd5635a1 RP |
1042 | { |
1043 | puts_filtered ("\n"); | |
159dd2aa JK |
1044 | if (indent != NULL) |
1045 | puts_filtered (indent); | |
bd5635a1 RP |
1046 | wrap_column = 0; |
1047 | } | |
1048 | else | |
1049 | { | |
1050 | wrap_column = chars_printed; | |
159dd2aa JK |
1051 | if (indent == NULL) |
1052 | wrap_indent = ""; | |
1053 | else | |
1054 | wrap_indent = indent; | |
bd5635a1 RP |
1055 | } |
1056 | } | |
1057 | ||
51b80b00 FF |
1058 | /* Ensure that whatever gets printed next, using the filtered output |
1059 | commands, starts at the beginning of the line. I.E. if there is | |
1060 | any pending output for the current line, flush it and start a new | |
1061 | line. Otherwise do nothing. */ | |
1062 | ||
1063 | void | |
1064 | begin_line () | |
1065 | { | |
1066 | if (chars_printed > 0) | |
1067 | { | |
1068 | puts_filtered ("\n"); | |
1069 | } | |
1070 | } | |
1071 | ||
bd5635a1 RP |
1072 | /* Like fputs but pause after every screenful, and can wrap at points |
1073 | other than the final character of a line. | |
1074 | Unlike fputs, fputs_filtered does not return a value. | |
1075 | It is OK for LINEBUFFER to be NULL, in which case just don't print | |
1076 | anything. | |
1077 | ||
1078 | Note that a longjmp to top level may occur in this routine | |
1079 | (since prompt_for_continue may do so) so this routine should not be | |
1080 | called when cleanups are not in place. */ | |
1081 | ||
1082 | void | |
1083 | fputs_filtered (linebuffer, stream) | |
088c3a0b | 1084 | const char *linebuffer; |
bd5635a1 RP |
1085 | FILE *stream; |
1086 | { | |
7919c3ed | 1087 | const char *lineptr; |
bd5635a1 RP |
1088 | |
1089 | if (linebuffer == 0) | |
1090 | return; | |
1091 | ||
1092 | /* Don't do any filtering if it is disabled. */ | |
1093 | if (stream != stdout | |
1094 | || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX)) | |
1095 | { | |
1096 | fputs (linebuffer, stream); | |
1097 | return; | |
1098 | } | |
1099 | ||
1100 | /* Go through and output each character. Show line extension | |
1101 | when this is necessary; prompt user for new page when this is | |
1102 | necessary. */ | |
1103 | ||
1104 | lineptr = linebuffer; | |
1105 | while (*lineptr) | |
1106 | { | |
1107 | /* Possible new page. */ | |
1108 | if (lines_printed >= lines_per_page - 1) | |
1109 | prompt_for_continue (); | |
1110 | ||
1111 | while (*lineptr && *lineptr != '\n') | |
1112 | { | |
1113 | /* Print a single line. */ | |
1114 | if (*lineptr == '\t') | |
1115 | { | |
1116 | if (wrap_column) | |
1117 | *wrap_pointer++ = '\t'; | |
1118 | else | |
1119 | putc ('\t', stream); | |
1120 | /* Shifting right by 3 produces the number of tab stops | |
1121 | we have already passed, and then adding one and | |
1122 | shifting left 3 advances to the next tab stop. */ | |
1123 | chars_printed = ((chars_printed >> 3) + 1) << 3; | |
1124 | lineptr++; | |
1125 | } | |
1126 | else | |
1127 | { | |
1128 | if (wrap_column) | |
1129 | *wrap_pointer++ = *lineptr; | |
1130 | else | |
1131 | putc (*lineptr, stream); | |
1132 | chars_printed++; | |
1133 | lineptr++; | |
1134 | } | |
1135 | ||
1136 | if (chars_printed >= chars_per_line) | |
1137 | { | |
1138 | unsigned int save_chars = chars_printed; | |
1139 | ||
1140 | chars_printed = 0; | |
1141 | lines_printed++; | |
1142 | /* If we aren't actually wrapping, don't output newline -- | |
1143 | if chars_per_line is right, we probably just overflowed | |
1144 | anyway; if it's wrong, let us keep going. */ | |
1145 | if (wrap_column) | |
1146 | putc ('\n', stream); | |
1147 | ||
1148 | /* Possible new page. */ | |
1149 | if (lines_printed >= lines_per_page - 1) | |
1150 | prompt_for_continue (); | |
1151 | ||
1152 | /* Now output indentation and wrapped string */ | |
1153 | if (wrap_column) | |
1154 | { | |
159dd2aa | 1155 | fputs (wrap_indent, stream); |
bd5635a1 RP |
1156 | *wrap_pointer = '\0'; /* Null-terminate saved stuff */ |
1157 | fputs (wrap_buffer, stream); /* and eject it */ | |
1158 | /* FIXME, this strlen is what prevents wrap_indent from | |
1159 | containing tabs. However, if we recurse to print it | |
1160 | and count its chars, we risk trouble if wrap_indent is | |
1161 | longer than (the user settable) chars_per_line. | |
1162 | Note also that this can set chars_printed > chars_per_line | |
1163 | if we are printing a long string. */ | |
1164 | chars_printed = strlen (wrap_indent) | |
1165 | + (save_chars - wrap_column); | |
1166 | wrap_pointer = wrap_buffer; /* Reset buffer */ | |
1167 | wrap_buffer[0] = '\0'; | |
1168 | wrap_column = 0; /* And disable fancy wrap */ | |
1169 | } | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | if (*lineptr == '\n') | |
1174 | { | |
1175 | chars_printed = 0; | |
d11c44f1 | 1176 | wrap_here ((char *)0); /* Spit out chars, cancel further wraps */ |
bd5635a1 RP |
1177 | lines_printed++; |
1178 | putc ('\n', stream); | |
1179 | lineptr++; | |
1180 | } | |
1181 | } | |
1182 | } | |
1183 | ||
bd5635a1 RP |
1184 | /* Print a variable number of ARGS using format FORMAT. If this |
1185 | information is going to put the amount written (since the last call | |
d974236f | 1186 | to REINITIALIZE_MORE_FILTER or the last page break) over the page size, |
bd5635a1 RP |
1187 | print out a pause message and do a gdb_readline to get the users |
1188 | permision to continue. | |
1189 | ||
1190 | Unlike fprintf, this function does not return a value. | |
1191 | ||
1192 | We implement three variants, vfprintf (takes a vararg list and stream), | |
1193 | fprintf (takes a stream to write on), and printf (the usual). | |
1194 | ||
1195 | Note that this routine has a restriction that the length of the | |
1196 | final output line must be less than 255 characters *or* it must be | |
1197 | less than twice the size of the format string. This is a very | |
1198 | arbitrary restriction, but it is an internal restriction, so I'll | |
1199 | put it in. This means that the %s format specifier is almost | |
1200 | useless; unless the caller can GUARANTEE that the string is short | |
1201 | enough, fputs_filtered should be used instead. | |
1202 | ||
1203 | Note also that a longjmp to top level may occur in this routine | |
1204 | (since prompt_for_continue may do so) so this routine should not be | |
1205 | called when cleanups are not in place. */ | |
1206 | ||
d974236f JG |
1207 | #define MIN_LINEBUF 255 |
1208 | ||
a8e033f2 | 1209 | void |
bd5635a1 | 1210 | vfprintf_filtered (stream, format, args) |
bd5635a1 RP |
1211 | FILE *stream; |
1212 | char *format; | |
7919c3ed | 1213 | va_list args; |
bd5635a1 | 1214 | { |
d974236f JG |
1215 | char line_buf[MIN_LINEBUF+10]; |
1216 | char *linebuffer = line_buf; | |
bd5635a1 RP |
1217 | int format_length; |
1218 | ||
1219 | format_length = strlen (format); | |
1220 | ||
bd5635a1 | 1221 | /* Reallocate buffer to a larger size if this is necessary. */ |
d974236f | 1222 | if (format_length * 2 > MIN_LINEBUF) |
bd5635a1 | 1223 | { |
d974236f | 1224 | linebuffer = alloca (10 + format_length * 2); |
bd5635a1 RP |
1225 | } |
1226 | ||
bd5635a1 RP |
1227 | /* This won't blow up if the restrictions described above are |
1228 | followed. */ | |
4ed3a9ea | 1229 | vsprintf (linebuffer, format, args); |
bd5635a1 RP |
1230 | |
1231 | fputs_filtered (linebuffer, stream); | |
1232 | } | |
1233 | ||
51b80b00 FF |
1234 | void |
1235 | vprintf_filtered (format, args) | |
1236 | char *format; | |
1237 | va_list args; | |
1238 | { | |
1239 | vfprintf_filtered (stdout, format, args); | |
1240 | } | |
1241 | ||
bd5635a1 RP |
1242 | /* VARARGS */ |
1243 | void | |
1244 | fprintf_filtered (va_alist) | |
1245 | va_dcl | |
1246 | { | |
546014f7 | 1247 | va_list args; |
bd5635a1 RP |
1248 | FILE *stream; |
1249 | char *format; | |
546014f7 PB |
1250 | |
1251 | va_start (args); | |
1252 | stream = va_arg (args, FILE *); | |
1253 | format = va_arg (args, char *); | |
1254 | ||
1255 | /* This won't blow up if the restrictions described above are | |
1256 | followed. */ | |
1257 | vfprintf_filtered (stream, format, args); | |
1258 | va_end (args); | |
1259 | } | |
1260 | ||
1261 | /* Like fprintf_filtered, but prints it's result indent. | |
1262 | Called as fprintfi_filtered (spaces, format, arg1, arg2, ...); */ | |
1263 | ||
1264 | /* VARARGS */ | |
1265 | void | |
1266 | fprintfi_filtered (va_alist) | |
1267 | va_dcl | |
1268 | { | |
7919c3ed | 1269 | va_list args; |
546014f7 PB |
1270 | int spaces; |
1271 | FILE *stream; | |
1272 | char *format; | |
bd5635a1 RP |
1273 | |
1274 | va_start (args); | |
546014f7 | 1275 | spaces = va_arg (args, int); |
bd5635a1 RP |
1276 | stream = va_arg (args, FILE *); |
1277 | format = va_arg (args, char *); | |
546014f7 | 1278 | print_spaces_filtered (spaces, stream); |
bd5635a1 RP |
1279 | |
1280 | /* This won't blow up if the restrictions described above are | |
1281 | followed. */ | |
7919c3ed | 1282 | vfprintf_filtered (stream, format, args); |
bd5635a1 RP |
1283 | va_end (args); |
1284 | } | |
1285 | ||
1286 | /* VARARGS */ | |
1287 | void | |
1288 | printf_filtered (va_alist) | |
1289 | va_dcl | |
1290 | { | |
1291 | va_list args; | |
1292 | char *format; | |
1293 | ||
1294 | va_start (args); | |
1295 | format = va_arg (args, char *); | |
1296 | ||
7919c3ed | 1297 | vfprintf_filtered (stdout, format, args); |
bd5635a1 RP |
1298 | va_end (args); |
1299 | } | |
bd5635a1 | 1300 | |
546014f7 PB |
1301 | /* Like printf_filtered, but prints it's result indented. |
1302 | Called as printfi_filtered (spaces, format, arg1, arg2, ...); */ | |
1303 | ||
1304 | /* VARARGS */ | |
1305 | void | |
1306 | printfi_filtered (va_alist) | |
1307 | va_dcl | |
1308 | { | |
1309 | va_list args; | |
1310 | int spaces; | |
1311 | char *format; | |
1312 | ||
1313 | va_start (args); | |
1314 | spaces = va_arg (args, int); | |
1315 | format = va_arg (args, char *); | |
1316 | print_spaces_filtered (spaces, stdout); | |
1317 | vfprintf_filtered (stdout, format, args); | |
1318 | va_end (args); | |
1319 | } | |
1320 | ||
51b80b00 FF |
1321 | /* Easy -- but watch out! |
1322 | ||
1323 | This routine is *not* a replacement for puts()! puts() appends a newline. | |
1324 | This one doesn't, and had better not! */ | |
bd5635a1 RP |
1325 | |
1326 | void | |
1327 | puts_filtered (string) | |
1328 | char *string; | |
1329 | { | |
1330 | fputs_filtered (string, stdout); | |
1331 | } | |
1332 | ||
1333 | /* Return a pointer to N spaces and a null. The pointer is good | |
1334 | until the next call to here. */ | |
1335 | char * | |
1336 | n_spaces (n) | |
1337 | int n; | |
1338 | { | |
1339 | register char *t; | |
1340 | static char *spaces; | |
1341 | static int max_spaces; | |
1342 | ||
1343 | if (n > max_spaces) | |
1344 | { | |
1345 | if (spaces) | |
1346 | free (spaces); | |
3624c875 | 1347 | spaces = (char *) xmalloc (n+1); |
bd5635a1 RP |
1348 | for (t = spaces+n; t != spaces;) |
1349 | *--t = ' '; | |
1350 | spaces[n] = '\0'; | |
1351 | max_spaces = n; | |
1352 | } | |
1353 | ||
1354 | return spaces + max_spaces - n; | |
1355 | } | |
1356 | ||
1357 | /* Print N spaces. */ | |
1358 | void | |
1359 | print_spaces_filtered (n, stream) | |
1360 | int n; | |
1361 | FILE *stream; | |
1362 | { | |
1363 | fputs_filtered (n_spaces (n), stream); | |
1364 | } | |
1365 | \f | |
1366 | /* C++ demangler stuff. */ | |
bd5635a1 | 1367 | |
65ce5df4 JG |
1368 | /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language |
1369 | LANG, using demangling args ARG_MODE, and print it filtered to STREAM. | |
1370 | If the name is not mangled, or the language for the name is unknown, or | |
1371 | demangling is off, the name is printed in its "raw" form. */ | |
1372 | ||
bd5635a1 | 1373 | void |
65ce5df4 | 1374 | fprintf_symbol_filtered (stream, name, lang, arg_mode) |
bd5635a1 RP |
1375 | FILE *stream; |
1376 | char *name; | |
65ce5df4 JG |
1377 | enum language lang; |
1378 | int arg_mode; | |
bd5635a1 | 1379 | { |
65ce5df4 | 1380 | char *demangled; |
bd5d07d9 | 1381 | |
65ce5df4 | 1382 | if (name != NULL) |
bd5d07d9 | 1383 | { |
65ce5df4 JG |
1384 | /* If user wants to see raw output, no problem. */ |
1385 | if (!demangle) | |
bd5d07d9 | 1386 | { |
65ce5df4 JG |
1387 | fputs_filtered (name, stream); |
1388 | } | |
1389 | else | |
1390 | { | |
1391 | switch (lang) | |
1392 | { | |
1393 | case language_cplus: | |
1394 | demangled = cplus_demangle (name, arg_mode); | |
1395 | break; | |
65ce5df4 JG |
1396 | case language_chill: |
1397 | demangled = chill_demangle (name); | |
1398 | break; | |
65ce5df4 JG |
1399 | default: |
1400 | demangled = NULL; | |
1401 | break; | |
1402 | } | |
1403 | fputs_filtered (demangled ? demangled : name, stream); | |
1404 | if (demangled != NULL) | |
1405 | { | |
1406 | free (demangled); | |
1407 | } | |
bd5d07d9 | 1408 | } |
bd5635a1 RP |
1409 | } |
1410 | } | |
51b57ded FF |
1411 | |
1412 | /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any | |
1413 | differences in whitespace. Returns 0 if they match, non-zero if they | |
546014f7 PB |
1414 | don't (slightly different than strcmp()'s range of return values). |
1415 | ||
1416 | As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO". | |
2e4964ad FF |
1417 | This "feature" is useful when searching for matching C++ function names |
1418 | (such as if the user types 'break FOO', where FOO is a mangled C++ | |
1419 | function). */ | |
51b57ded | 1420 | |
51b80b00 | 1421 | int |
51b57ded FF |
1422 | strcmp_iw (string1, string2) |
1423 | const char *string1; | |
1424 | const char *string2; | |
1425 | { | |
1426 | while ((*string1 != '\0') && (*string2 != '\0')) | |
1427 | { | |
1428 | while (isspace (*string1)) | |
1429 | { | |
1430 | string1++; | |
1431 | } | |
1432 | while (isspace (*string2)) | |
1433 | { | |
1434 | string2++; | |
1435 | } | |
1436 | if (*string1 != *string2) | |
1437 | { | |
1438 | break; | |
1439 | } | |
1440 | if (*string1 != '\0') | |
1441 | { | |
1442 | string1++; | |
1443 | string2++; | |
1444 | } | |
1445 | } | |
546014f7 | 1446 | return (*string1 != '\0' && *string1 != '(') || (*string2 != '\0'); |
51b57ded FF |
1447 | } |
1448 | ||
bd5635a1 | 1449 | \f |
bd5635a1 RP |
1450 | void |
1451 | _initialize_utils () | |
1452 | { | |
1453 | struct cmd_list_element *c; | |
1454 | ||
1455 | c = add_set_cmd ("width", class_support, var_uinteger, | |
1456 | (char *)&chars_per_line, | |
1457 | "Set number of characters gdb thinks are in a line.", | |
1458 | &setlist); | |
1459 | add_show_from_set (c, &showlist); | |
d747e0af | 1460 | c->function.sfunc = set_width_command; |
bd5635a1 RP |
1461 | |
1462 | add_show_from_set | |
1463 | (add_set_cmd ("height", class_support, | |
1464 | var_uinteger, (char *)&lines_per_page, | |
1465 | "Set number of lines gdb thinks are in a page.", &setlist), | |
1466 | &showlist); | |
1467 | ||
1468 | /* These defaults will be used if we are unable to get the correct | |
1469 | values from termcap. */ | |
51b57ded FF |
1470 | #if defined(__GO32__) |
1471 | lines_per_page = ScreenRows(); | |
1472 | chars_per_line = ScreenCols(); | |
1473 | #else | |
bd5635a1 RP |
1474 | lines_per_page = 24; |
1475 | chars_per_line = 80; | |
1476 | /* Initialize the screen height and width from termcap. */ | |
1477 | { | |
1478 | char *termtype = getenv ("TERM"); | |
1479 | ||
1480 | /* Positive means success, nonpositive means failure. */ | |
1481 | int status; | |
1482 | ||
1483 | /* 2048 is large enough for all known terminals, according to the | |
1484 | GNU termcap manual. */ | |
1485 | char term_buffer[2048]; | |
1486 | ||
1487 | if (termtype) | |
1488 | { | |
1489 | status = tgetent (term_buffer, termtype); | |
1490 | if (status > 0) | |
1491 | { | |
1492 | int val; | |
1493 | ||
1494 | val = tgetnum ("li"); | |
1495 | if (val >= 0) | |
1496 | lines_per_page = val; | |
1497 | else | |
1498 | /* The number of lines per page is not mentioned | |
1499 | in the terminal description. This probably means | |
1500 | that paging is not useful (e.g. emacs shell window), | |
1501 | so disable paging. */ | |
1502 | lines_per_page = UINT_MAX; | |
1503 | ||
1504 | val = tgetnum ("co"); | |
1505 | if (val >= 0) | |
1506 | chars_per_line = val; | |
1507 | } | |
1508 | } | |
1509 | } | |
1510 | ||
1eeba686 PB |
1511 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
1512 | ||
4ace50a5 | 1513 | /* If there is a better way to determine the window size, use it. */ |
1eeba686 PB |
1514 | SIGWINCH_HANDLER (); |
1515 | #endif | |
51b57ded | 1516 | #endif |
2bc2e684 FF |
1517 | /* If the output is not a terminal, don't paginate it. */ |
1518 | if (!ISATTY (stdout)) | |
1519 | lines_per_page = UINT_MAX; | |
1520 | ||
bd5635a1 RP |
1521 | set_width_command ((char *)NULL, 0, c); |
1522 | ||
1523 | add_show_from_set | |
1524 | (add_set_cmd ("demangle", class_support, var_boolean, | |
1525 | (char *)&demangle, | |
1526 | "Set demangling of encoded C++ names when displaying symbols.", | |
f266e564 JK |
1527 | &setprintlist), |
1528 | &showprintlist); | |
bd5635a1 RP |
1529 | |
1530 | add_show_from_set | |
1531 | (add_set_cmd ("sevenbit-strings", class_support, var_boolean, | |
1532 | (char *)&sevenbit_strings, | |
1533 | "Set printing of 8-bit characters in strings as \\nnn.", | |
f266e564 JK |
1534 | &setprintlist), |
1535 | &showprintlist); | |
bd5635a1 RP |
1536 | |
1537 | add_show_from_set | |
1538 | (add_set_cmd ("asm-demangle", class_support, var_boolean, | |
1539 | (char *)&asm_demangle, | |
1540 | "Set demangling of C++ names in disassembly listings.", | |
f266e564 JK |
1541 | &setprintlist), |
1542 | &showprintlist); | |
bd5635a1 | 1543 | } |
1eeba686 PB |
1544 | |
1545 | /* Machine specific function to handle SIGWINCH signal. */ | |
1546 | ||
1547 | #ifdef SIGWINCH_HANDLER_BODY | |
1548 | SIGWINCH_HANDLER_BODY | |
1549 | #endif | |
bd5d07d9 | 1550 |