1d84967f6f5e3629da1937a0898b35f0faced6e1
[deliverable/binutils-gdb.git] / gdb / utils.c
1 /* General utility routines for GDB, the GNU debugger.
2
3 Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software
5 Foundation, Inc.
6
7 This file is part of GDB.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
23
24 #include "defs.h"
25 #include "gdb_assert.h"
26 #include <ctype.h>
27 #include "gdb_string.h"
28 #include "event-top.h"
29 #include "exceptions.h"
30
31 #ifdef TUI
32 #include "tui/tui.h" /* For tui_get_command_dimension. */
33 #endif
34
35 #ifdef __GO32__
36 #include <pc.h>
37 #endif
38
39 /* SunOS's curses.h has a '#define reg register' in it. Thank you Sun. */
40 #ifdef reg
41 #undef reg
42 #endif
43
44 #include <signal.h>
45 #include "gdbcmd.h"
46 #include "serial.h"
47 #include "bfd.h"
48 #include "target.h"
49 #include "demangle.h"
50 #include "expression.h"
51 #include "language.h"
52 #include "charset.h"
53 #include "annotate.h"
54 #include "filenames.h"
55 #include "symfile.h"
56
57 #include "inferior.h" /* for signed_pointer_to_address */
58
59 #include <sys/param.h> /* For MAXPATHLEN */
60
61 #include "gdb_curses.h"
62
63 #include "readline/readline.h"
64
65 #ifdef NEED_DECLARATION_MALLOC
66 extern PTR malloc (); /* OK: PTR */
67 #endif
68 #ifdef NEED_DECLARATION_REALLOC
69 extern PTR realloc (); /* OK: PTR */
70 #endif
71 #ifdef NEED_DECLARATION_FREE
72 extern void free ();
73 #endif
74 /* Actually, we'll never have the decl, since we don't define _GNU_SOURCE. */
75 #if defined(HAVE_CANONICALIZE_FILE_NAME) \
76 && defined(NEED_DECLARATION_CANONICALIZE_FILE_NAME)
77 extern char *canonicalize_file_name (const char *);
78 #endif
79
80 /* readline defines this. */
81 #undef savestring
82
83 void (*deprecated_error_begin_hook) (void);
84
85 /* Prototypes for local functions */
86
87 static void vfprintf_maybe_filtered (struct ui_file *, const char *,
88 va_list, int);
89
90 static void fputs_maybe_filtered (const char *, struct ui_file *, int);
91
92 static void do_my_cleanups (struct cleanup **, struct cleanup *);
93
94 static void prompt_for_continue (void);
95
96 static void set_screen_size (void);
97 static void set_width (void);
98
99 /* Chain of cleanup actions established with make_cleanup,
100 to be executed if an error happens. */
101
102 static struct cleanup *cleanup_chain; /* cleaned up after a failed command */
103 static struct cleanup *final_cleanup_chain; /* cleaned up when gdb exits */
104 static struct cleanup *run_cleanup_chain; /* cleaned up on each 'run' */
105 static struct cleanup *exec_cleanup_chain; /* cleaned up on each execution command */
106 /* cleaned up on each error from within an execution command */
107 static struct cleanup *exec_error_cleanup_chain;
108
109 /* Pointer to what is left to do for an execution command after the
110 target stops. Used only in asynchronous mode, by targets that
111 support async execution. The finish and until commands use it. So
112 does the target extended-remote command. */
113 struct continuation *cmd_continuation;
114 struct continuation *intermediate_continuation;
115
116 /* Nonzero if we have job control. */
117
118 int job_control;
119
120 /* Nonzero means a quit has been requested. */
121
122 int quit_flag;
123
124 /* Nonzero means quit immediately if Control-C is typed now, rather
125 than waiting until QUIT is executed. Be careful in setting this;
126 code which executes with immediate_quit set has to be very careful
127 about being able to deal with being interrupted at any time. It is
128 almost always better to use QUIT; the only exception I can think of
129 is being able to quit out of a system call (using EINTR loses if
130 the SIGINT happens between the previous QUIT and the system call).
131 To immediately quit in the case in which a SIGINT happens between
132 the previous QUIT and setting immediate_quit (desirable anytime we
133 expect to block), call QUIT after setting immediate_quit. */
134
135 int immediate_quit;
136
137 /* Nonzero means that encoded C++/ObjC names should be printed out in their
138 C++/ObjC form rather than raw. */
139
140 int demangle = 1;
141
142 /* Nonzero means that encoded C++/ObjC names should be printed out in their
143 C++/ObjC form even in assembler language displays. If this is set, but
144 DEMANGLE is zero, names are printed raw, i.e. DEMANGLE controls. */
145
146 int asm_demangle = 0;
147
148 /* Nonzero means that strings with character values >0x7F should be printed
149 as octal escapes. Zero means just print the value (e.g. it's an
150 international character, and the terminal or window can cope.) */
151
152 int sevenbit_strings = 0;
153
154 /* String to be printed before error messages, if any. */
155
156 char *error_pre_print;
157
158 /* String to be printed before quit messages, if any. */
159
160 char *quit_pre_print;
161
162 /* String to be printed before warning messages, if any. */
163
164 char *warning_pre_print = "\nwarning: ";
165
166 int pagination_enabled = 1;
167 \f
168
169 /* Add a new cleanup to the cleanup_chain,
170 and return the previous chain pointer
171 to be passed later to do_cleanups or discard_cleanups.
172 Args are FUNCTION to clean up with, and ARG to pass to it. */
173
174 struct cleanup *
175 make_cleanup (make_cleanup_ftype *function, void *arg)
176 {
177 return make_my_cleanup (&cleanup_chain, function, arg);
178 }
179
180 struct cleanup *
181 make_final_cleanup (make_cleanup_ftype *function, void *arg)
182 {
183 return make_my_cleanup (&final_cleanup_chain, function, arg);
184 }
185
186 struct cleanup *
187 make_run_cleanup (make_cleanup_ftype *function, void *arg)
188 {
189 return make_my_cleanup (&run_cleanup_chain, function, arg);
190 }
191
192 struct cleanup *
193 make_exec_cleanup (make_cleanup_ftype *function, void *arg)
194 {
195 return make_my_cleanup (&exec_cleanup_chain, function, arg);
196 }
197
198 struct cleanup *
199 make_exec_error_cleanup (make_cleanup_ftype *function, void *arg)
200 {
201 return make_my_cleanup (&exec_error_cleanup_chain, function, arg);
202 }
203
204 static void
205 do_freeargv (void *arg)
206 {
207 freeargv ((char **) arg);
208 }
209
210 struct cleanup *
211 make_cleanup_freeargv (char **arg)
212 {
213 return make_my_cleanup (&cleanup_chain, do_freeargv, arg);
214 }
215
216 static void
217 do_bfd_close_cleanup (void *arg)
218 {
219 bfd_close (arg);
220 }
221
222 struct cleanup *
223 make_cleanup_bfd_close (bfd *abfd)
224 {
225 return make_cleanup (do_bfd_close_cleanup, abfd);
226 }
227
228 static void
229 do_close_cleanup (void *arg)
230 {
231 int *fd = arg;
232 close (*fd);
233 xfree (fd);
234 }
235
236 struct cleanup *
237 make_cleanup_close (int fd)
238 {
239 int *saved_fd = xmalloc (sizeof (fd));
240 *saved_fd = fd;
241 return make_cleanup (do_close_cleanup, saved_fd);
242 }
243
244 static void
245 do_ui_file_delete (void *arg)
246 {
247 ui_file_delete (arg);
248 }
249
250 struct cleanup *
251 make_cleanup_ui_file_delete (struct ui_file *arg)
252 {
253 return make_my_cleanup (&cleanup_chain, do_ui_file_delete, arg);
254 }
255
256 static void
257 do_free_section_addr_info (void *arg)
258 {
259 free_section_addr_info (arg);
260 }
261
262 struct cleanup *
263 make_cleanup_free_section_addr_info (struct section_addr_info *addrs)
264 {
265 return make_my_cleanup (&cleanup_chain, do_free_section_addr_info, addrs);
266 }
267
268
269 struct cleanup *
270 make_my_cleanup (struct cleanup **pmy_chain, make_cleanup_ftype *function,
271 void *arg)
272 {
273 struct cleanup *new
274 = (struct cleanup *) xmalloc (sizeof (struct cleanup));
275 struct cleanup *old_chain = *pmy_chain;
276
277 new->next = *pmy_chain;
278 new->function = function;
279 new->arg = arg;
280 *pmy_chain = new;
281
282 return old_chain;
283 }
284
285 /* Discard cleanups and do the actions they describe
286 until we get back to the point OLD_CHAIN in the cleanup_chain. */
287
288 void
289 do_cleanups (struct cleanup *old_chain)
290 {
291 do_my_cleanups (&cleanup_chain, old_chain);
292 }
293
294 void
295 do_final_cleanups (struct cleanup *old_chain)
296 {
297 do_my_cleanups (&final_cleanup_chain, old_chain);
298 }
299
300 void
301 do_run_cleanups (struct cleanup *old_chain)
302 {
303 do_my_cleanups (&run_cleanup_chain, old_chain);
304 }
305
306 void
307 do_exec_cleanups (struct cleanup *old_chain)
308 {
309 do_my_cleanups (&exec_cleanup_chain, old_chain);
310 }
311
312 void
313 do_exec_error_cleanups (struct cleanup *old_chain)
314 {
315 do_my_cleanups (&exec_error_cleanup_chain, old_chain);
316 }
317
318 static void
319 do_my_cleanups (struct cleanup **pmy_chain,
320 struct cleanup *old_chain)
321 {
322 struct cleanup *ptr;
323 while ((ptr = *pmy_chain) != old_chain)
324 {
325 *pmy_chain = ptr->next; /* Do this first incase recursion */
326 (*ptr->function) (ptr->arg);
327 xfree (ptr);
328 }
329 }
330
331 /* Discard cleanups, not doing the actions they describe,
332 until we get back to the point OLD_CHAIN in the cleanup_chain. */
333
334 void
335 discard_cleanups (struct cleanup *old_chain)
336 {
337 discard_my_cleanups (&cleanup_chain, old_chain);
338 }
339
340 void
341 discard_final_cleanups (struct cleanup *old_chain)
342 {
343 discard_my_cleanups (&final_cleanup_chain, old_chain);
344 }
345
346 void
347 discard_exec_error_cleanups (struct cleanup *old_chain)
348 {
349 discard_my_cleanups (&exec_error_cleanup_chain, old_chain);
350 }
351
352 void
353 discard_my_cleanups (struct cleanup **pmy_chain,
354 struct cleanup *old_chain)
355 {
356 struct cleanup *ptr;
357 while ((ptr = *pmy_chain) != old_chain)
358 {
359 *pmy_chain = ptr->next;
360 xfree (ptr);
361 }
362 }
363
364 /* Set the cleanup_chain to 0, and return the old cleanup chain. */
365 struct cleanup *
366 save_cleanups (void)
367 {
368 return save_my_cleanups (&cleanup_chain);
369 }
370
371 struct cleanup *
372 save_final_cleanups (void)
373 {
374 return save_my_cleanups (&final_cleanup_chain);
375 }
376
377 struct cleanup *
378 save_my_cleanups (struct cleanup **pmy_chain)
379 {
380 struct cleanup *old_chain = *pmy_chain;
381
382 *pmy_chain = 0;
383 return old_chain;
384 }
385
386 /* Restore the cleanup chain from a previously saved chain. */
387 void
388 restore_cleanups (struct cleanup *chain)
389 {
390 restore_my_cleanups (&cleanup_chain, chain);
391 }
392
393 void
394 restore_final_cleanups (struct cleanup *chain)
395 {
396 restore_my_cleanups (&final_cleanup_chain, chain);
397 }
398
399 void
400 restore_my_cleanups (struct cleanup **pmy_chain, struct cleanup *chain)
401 {
402 *pmy_chain = chain;
403 }
404
405 /* This function is useful for cleanups.
406 Do
407
408 foo = xmalloc (...);
409 old_chain = make_cleanup (free_current_contents, &foo);
410
411 to arrange to free the object thus allocated. */
412
413 void
414 free_current_contents (void *ptr)
415 {
416 void **location = ptr;
417 if (location == NULL)
418 internal_error (__FILE__, __LINE__,
419 "free_current_contents: NULL pointer");
420 if (*location != NULL)
421 {
422 xfree (*location);
423 *location = NULL;
424 }
425 }
426
427 /* Provide a known function that does nothing, to use as a base for
428 for a possibly long chain of cleanups. This is useful where we
429 use the cleanup chain for handling normal cleanups as well as dealing
430 with cleanups that need to be done as a result of a call to error().
431 In such cases, we may not be certain where the first cleanup is, unless
432 we have a do-nothing one to always use as the base. */
433
434 void
435 null_cleanup (void *arg)
436 {
437 }
438
439 /* Add a continuation to the continuation list, the global list
440 cmd_continuation. The new continuation will be added at the front.*/
441 void
442 add_continuation (void (*continuation_hook) (struct continuation_arg *),
443 struct continuation_arg *arg_list)
444 {
445 struct continuation *continuation_ptr;
446
447 continuation_ptr =
448 (struct continuation *) xmalloc (sizeof (struct continuation));
449 continuation_ptr->continuation_hook = continuation_hook;
450 continuation_ptr->arg_list = arg_list;
451 continuation_ptr->next = cmd_continuation;
452 cmd_continuation = continuation_ptr;
453 }
454
455 /* Walk down the cmd_continuation list, and execute all the
456 continuations. There is a problem though. In some cases new
457 continuations may be added while we are in the middle of this
458 loop. If this happens they will be added in the front, and done
459 before we have a chance of exhausting those that were already
460 there. We need to then save the beginning of the list in a pointer
461 and do the continuations from there on, instead of using the
462 global beginning of list as our iteration pointer. */
463 void
464 do_all_continuations (void)
465 {
466 struct continuation *continuation_ptr;
467 struct continuation *saved_continuation;
468
469 /* Copy the list header into another pointer, and set the global
470 list header to null, so that the global list can change as a side
471 effect of invoking the continuations and the processing of
472 the preexisting continuations will not be affected. */
473 continuation_ptr = cmd_continuation;
474 cmd_continuation = NULL;
475
476 /* Work now on the list we have set aside. */
477 while (continuation_ptr)
478 {
479 (continuation_ptr->continuation_hook) (continuation_ptr->arg_list);
480 saved_continuation = continuation_ptr;
481 continuation_ptr = continuation_ptr->next;
482 xfree (saved_continuation);
483 }
484 }
485
486 /* Walk down the cmd_continuation list, and get rid of all the
487 continuations. */
488 void
489 discard_all_continuations (void)
490 {
491 struct continuation *continuation_ptr;
492
493 while (cmd_continuation)
494 {
495 continuation_ptr = cmd_continuation;
496 cmd_continuation = continuation_ptr->next;
497 xfree (continuation_ptr);
498 }
499 }
500
501 /* Add a continuation to the continuation list, the global list
502 intermediate_continuation. The new continuation will be added at
503 the front. */
504 void
505 add_intermediate_continuation (void (*continuation_hook)
506 (struct continuation_arg *),
507 struct continuation_arg *arg_list)
508 {
509 struct continuation *continuation_ptr;
510
511 continuation_ptr =
512 (struct continuation *) xmalloc (sizeof (struct continuation));
513 continuation_ptr->continuation_hook = continuation_hook;
514 continuation_ptr->arg_list = arg_list;
515 continuation_ptr->next = intermediate_continuation;
516 intermediate_continuation = continuation_ptr;
517 }
518
519 /* Walk down the cmd_continuation list, and execute all the
520 continuations. There is a problem though. In some cases new
521 continuations may be added while we are in the middle of this
522 loop. If this happens they will be added in the front, and done
523 before we have a chance of exhausting those that were already
524 there. We need to then save the beginning of the list in a pointer
525 and do the continuations from there on, instead of using the
526 global beginning of list as our iteration pointer.*/
527 void
528 do_all_intermediate_continuations (void)
529 {
530 struct continuation *continuation_ptr;
531 struct continuation *saved_continuation;
532
533 /* Copy the list header into another pointer, and set the global
534 list header to null, so that the global list can change as a side
535 effect of invoking the continuations and the processing of
536 the preexisting continuations will not be affected. */
537 continuation_ptr = intermediate_continuation;
538 intermediate_continuation = NULL;
539
540 /* Work now on the list we have set aside. */
541 while (continuation_ptr)
542 {
543 (continuation_ptr->continuation_hook) (continuation_ptr->arg_list);
544 saved_continuation = continuation_ptr;
545 continuation_ptr = continuation_ptr->next;
546 xfree (saved_continuation);
547 }
548 }
549
550 /* Walk down the cmd_continuation list, and get rid of all the
551 continuations. */
552 void
553 discard_all_intermediate_continuations (void)
554 {
555 struct continuation *continuation_ptr;
556
557 while (intermediate_continuation)
558 {
559 continuation_ptr = intermediate_continuation;
560 intermediate_continuation = continuation_ptr->next;
561 xfree (continuation_ptr);
562 }
563 }
564 \f
565
566
567 /* Print a warning message. The first argument STRING is the warning
568 message, used as an fprintf format string, the second is the
569 va_list of arguments for that string. A warning is unfiltered (not
570 paginated) so that the user does not need to page through each
571 screen full of warnings when there are lots of them. */
572
573 void
574 vwarning (const char *string, va_list args)
575 {
576 if (deprecated_warning_hook)
577 (*deprecated_warning_hook) (string, args);
578 else
579 {
580 target_terminal_ours ();
581 wrap_here (""); /* Force out any buffered output */
582 gdb_flush (gdb_stdout);
583 if (warning_pre_print)
584 fputs_unfiltered (warning_pre_print, gdb_stderr);
585 vfprintf_unfiltered (gdb_stderr, string, args);
586 fprintf_unfiltered (gdb_stderr, "\n");
587 va_end (args);
588 }
589 }
590
591 /* Print a warning message.
592 The first argument STRING is the warning message, used as a fprintf string,
593 and the remaining args are passed as arguments to it.
594 The primary difference between warnings and errors is that a warning
595 does not force the return to command level. */
596
597 void
598 warning (const char *string, ...)
599 {
600 va_list args;
601 va_start (args, string);
602 vwarning (string, args);
603 va_end (args);
604 }
605
606 /* Print an error message and return to command level.
607 The first argument STRING is the error message, used as a fprintf string,
608 and the remaining args are passed as arguments to it. */
609
610 NORETURN void
611 verror (const char *string, va_list args)
612 {
613 throw_verror (GENERIC_ERROR, string, args);
614 }
615
616 NORETURN void
617 error (const char *string, ...)
618 {
619 va_list args;
620 va_start (args, string);
621 throw_verror (GENERIC_ERROR, string, args);
622 va_end (args);
623 }
624
625 /* Print an error message and quit.
626 The first argument STRING is the error message, used as a fprintf string,
627 and the remaining args are passed as arguments to it. */
628
629 NORETURN void
630 vfatal (const char *string, va_list args)
631 {
632 throw_vfatal (string, args);
633 }
634
635 NORETURN void
636 fatal (const char *string, ...)
637 {
638 va_list args;
639 va_start (args, string);
640 throw_vfatal (string, args);
641 va_end (args);
642 }
643
644 /* Cause a silent error to occur. Any error message is recorded
645 though it is not issued. */
646 NORETURN void
647 error_silent (const char *string, ...)
648 {
649 va_list args;
650 va_start (args, string);
651 throw_vsilent (string, args);
652 va_end (args);
653 }
654
655 /* Output an error message including any pre-print text to gdb_stderr. */
656 void
657 error_output_message (char *pre_print, char *msg)
658 {
659 target_terminal_ours ();
660 wrap_here (""); /* Force out any buffered output */
661 gdb_flush (gdb_stdout);
662 annotate_error_begin ();
663 if (pre_print)
664 fputs_filtered (pre_print, gdb_stderr);
665 fputs_filtered (msg, gdb_stderr);
666 fprintf_filtered (gdb_stderr, "\n");
667 }
668
669 NORETURN void
670 error_stream (struct ui_file *stream)
671 {
672 long len;
673 char *message = ui_file_xstrdup (stream, &len);
674 make_cleanup (xfree, message);
675 error ("%s", message);
676 }
677
678 /* Print a message reporting an internal error/warning. Ask the user
679 if they want to continue, dump core, or just exit. Return
680 something to indicate a quit. */
681
682 struct internal_problem
683 {
684 const char *name;
685 /* FIXME: cagney/2002-08-15: There should be ``maint set/show''
686 commands available for controlling these variables. */
687 enum auto_boolean should_quit;
688 enum auto_boolean should_dump_core;
689 };
690
691 /* Report a problem, internal to GDB, to the user. Once the problem
692 has been reported, and assuming GDB didn't quit, the caller can
693 either allow execution to resume or throw an error. */
694
695 static void
696 internal_vproblem (struct internal_problem *problem,
697 const char *file, int line, const char *fmt, va_list ap)
698 {
699 static int dejavu;
700 int quit_p;
701 int dump_core_p;
702 char *reason;
703
704 /* Don't allow infinite error/warning recursion. */
705 {
706 static char msg[] = "Recursive internal problem.\n";
707 switch (dejavu)
708 {
709 case 0:
710 dejavu = 1;
711 break;
712 case 1:
713 dejavu = 2;
714 fputs_unfiltered (msg, gdb_stderr);
715 abort (); /* NOTE: GDB has only three calls to abort(). */
716 default:
717 dejavu = 3;
718 write (STDERR_FILENO, msg, sizeof (msg));
719 exit (1);
720 }
721 }
722
723 /* Try to get the message out and at the start of a new line. */
724 target_terminal_ours ();
725 begin_line ();
726
727 /* Create a string containing the full error/warning message. Need
728 to call query with this full string, as otherwize the reason
729 (error/warning) and question become separated. Format using a
730 style similar to a compiler error message. Include extra detail
731 so that the user knows that they are living on the edge. */
732 {
733 char *msg;
734 msg = xstrvprintf (fmt, ap);
735 reason = xstrprintf ("\
736 %s:%d: %s: %s\n\
737 A problem internal to GDB has been detected,\n\
738 further debugging may prove unreliable.", file, line, problem->name, msg);
739 xfree (msg);
740 make_cleanup (xfree, reason);
741 }
742
743 switch (problem->should_quit)
744 {
745 case AUTO_BOOLEAN_AUTO:
746 /* Default (yes/batch case) is to quit GDB. When in batch mode
747 this lessens the likelhood of GDB going into an infinate
748 loop. */
749 quit_p = query ("%s\nQuit this debugging session? ", reason);
750 break;
751 case AUTO_BOOLEAN_TRUE:
752 quit_p = 1;
753 break;
754 case AUTO_BOOLEAN_FALSE:
755 quit_p = 0;
756 break;
757 default:
758 internal_error (__FILE__, __LINE__, "bad switch");
759 }
760
761 switch (problem->should_dump_core)
762 {
763 case AUTO_BOOLEAN_AUTO:
764 /* Default (yes/batch case) is to dump core. This leaves a GDB
765 `dropping' so that it is easier to see that something went
766 wrong in GDB. */
767 dump_core_p = query ("%s\nCreate a core file of GDB? ", reason);
768 break;
769 break;
770 case AUTO_BOOLEAN_TRUE:
771 dump_core_p = 1;
772 break;
773 case AUTO_BOOLEAN_FALSE:
774 dump_core_p = 0;
775 break;
776 default:
777 internal_error (__FILE__, __LINE__, "bad switch");
778 }
779
780 if (quit_p)
781 {
782 if (dump_core_p)
783 abort (); /* NOTE: GDB has only three calls to abort(). */
784 else
785 exit (1);
786 }
787 else
788 {
789 if (dump_core_p)
790 {
791 if (fork () == 0)
792 abort (); /* NOTE: GDB has only three calls to abort(). */
793 }
794 }
795
796 dejavu = 0;
797 }
798
799 static struct internal_problem internal_error_problem = {
800 "internal-error", AUTO_BOOLEAN_AUTO, AUTO_BOOLEAN_AUTO
801 };
802
803 NORETURN void
804 internal_verror (const char *file, int line, const char *fmt, va_list ap)
805 {
806 internal_vproblem (&internal_error_problem, file, line, fmt, ap);
807 throw_reason (RETURN_ERROR);
808 }
809
810 NORETURN void
811 internal_error (const char *file, int line, const char *string, ...)
812 {
813 va_list ap;
814 va_start (ap, string);
815 internal_verror (file, line, string, ap);
816 va_end (ap);
817 }
818
819 static struct internal_problem internal_warning_problem = {
820 "internal-warning", AUTO_BOOLEAN_AUTO, AUTO_BOOLEAN_AUTO
821 };
822
823 void
824 internal_vwarning (const char *file, int line, const char *fmt, va_list ap)
825 {
826 internal_vproblem (&internal_warning_problem, file, line, fmt, ap);
827 }
828
829 void
830 internal_warning (const char *file, int line, const char *string, ...)
831 {
832 va_list ap;
833 va_start (ap, string);
834 internal_vwarning (file, line, string, ap);
835 va_end (ap);
836 }
837
838 /* The strerror() function can return NULL for errno values that are
839 out of range. Provide a "safe" version that always returns a
840 printable string. */
841
842 char *
843 safe_strerror (int errnum)
844 {
845 char *msg;
846 static char buf[32];
847
848 msg = strerror (errnum);
849 if (msg == NULL)
850 {
851 sprintf (buf, "(undocumented errno %d)", errnum);
852 msg = buf;
853 }
854 return (msg);
855 }
856
857 /* Print the system error message for errno, and also mention STRING
858 as the file name for which the error was encountered.
859 Then return to command level. */
860
861 NORETURN void
862 perror_with_name (const char *string)
863 {
864 char *err;
865 char *combined;
866
867 err = safe_strerror (errno);
868 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
869 strcpy (combined, string);
870 strcat (combined, ": ");
871 strcat (combined, err);
872
873 /* I understand setting these is a matter of taste. Still, some people
874 may clear errno but not know about bfd_error. Doing this here is not
875 unreasonable. */
876 bfd_set_error (bfd_error_no_error);
877 errno = 0;
878
879 error ("%s.", combined);
880 }
881
882 /* Print the system error message for ERRCODE, and also mention STRING
883 as the file name for which the error was encountered. */
884
885 void
886 print_sys_errmsg (const char *string, int errcode)
887 {
888 char *err;
889 char *combined;
890
891 err = safe_strerror (errcode);
892 combined = (char *) alloca (strlen (err) + strlen (string) + 3);
893 strcpy (combined, string);
894 strcat (combined, ": ");
895 strcat (combined, err);
896
897 /* We want anything which was printed on stdout to come out first, before
898 this message. */
899 gdb_flush (gdb_stdout);
900 fprintf_unfiltered (gdb_stderr, "%s.\n", combined);
901 }
902
903 /* Control C eventually causes this to be called, at a convenient time. */
904
905 void
906 quit (void)
907 {
908 struct serial *gdb_stdout_serial = serial_fdopen (1);
909
910 target_terminal_ours ();
911
912 /* We want all output to appear now, before we print "Quit". We
913 have 3 levels of buffering we have to flush (it's possible that
914 some of these should be changed to flush the lower-level ones
915 too): */
916
917 /* 1. The _filtered buffer. */
918 wrap_here ((char *) 0);
919
920 /* 2. The stdio buffer. */
921 gdb_flush (gdb_stdout);
922 gdb_flush (gdb_stderr);
923
924 /* 3. The system-level buffer. */
925 serial_drain_output (gdb_stdout_serial);
926 serial_un_fdopen (gdb_stdout_serial);
927
928 annotate_error_begin ();
929
930 /* Don't use *_filtered; we don't want to prompt the user to continue. */
931 if (quit_pre_print)
932 fputs_unfiltered (quit_pre_print, gdb_stderr);
933
934 #ifdef __MSDOS__
935 /* No steenking SIGINT will ever be coming our way when the
936 program is resumed. Don't lie. */
937 fprintf_unfiltered (gdb_stderr, "Quit\n");
938 #else
939 if (job_control
940 /* If there is no terminal switching for this target, then we can't
941 possibly get screwed by the lack of job control. */
942 || current_target.to_terminal_ours == NULL)
943 fprintf_unfiltered (gdb_stderr, "Quit\n");
944 else
945 fprintf_unfiltered (gdb_stderr,
946 "Quit (expect signal SIGINT when the program is resumed)\n");
947 #endif
948 throw_reason (RETURN_QUIT);
949 }
950
951 /* Control C comes here */
952 void
953 request_quit (int signo)
954 {
955 quit_flag = 1;
956 /* Restore the signal handler. Harmless with BSD-style signals,
957 needed for System V-style signals. */
958 signal (signo, request_quit);
959
960 if (immediate_quit)
961 quit ();
962 }
963 \f
964 /* Called when a memory allocation fails, with the number of bytes of
965 memory requested in SIZE. */
966
967 NORETURN void
968 nomem (long size)
969 {
970 if (size > 0)
971 {
972 internal_error (__FILE__, __LINE__,
973 "virtual memory exhausted: can't allocate %ld bytes.",
974 size);
975 }
976 else
977 {
978 internal_error (__FILE__, __LINE__, "virtual memory exhausted.");
979 }
980 }
981
982 /* The xmalloc() (libiberty.h) family of memory management routines.
983
984 These are like the ISO-C malloc() family except that they implement
985 consistent semantics and guard against typical memory management
986 problems. */
987
988 /* NOTE: These are declared using PTR to ensure consistency with
989 "libiberty.h". xfree() is GDB local. */
990
991 PTR /* OK: PTR */
992 xmalloc (size_t size)
993 {
994 void *val;
995
996 /* See libiberty/xmalloc.c. This function need's to match that's
997 semantics. It never returns NULL. */
998 if (size == 0)
999 size = 1;
1000
1001 val = malloc (size); /* OK: malloc */
1002 if (val == NULL)
1003 nomem (size);
1004
1005 return (val);
1006 }
1007
1008 PTR /* OK: PTR */
1009 xrealloc (PTR ptr, size_t size) /* OK: PTR */
1010 {
1011 void *val;
1012
1013 /* See libiberty/xmalloc.c. This function need's to match that's
1014 semantics. It never returns NULL. */
1015 if (size == 0)
1016 size = 1;
1017
1018 if (ptr != NULL)
1019 val = realloc (ptr, size); /* OK: realloc */
1020 else
1021 val = malloc (size); /* OK: malloc */
1022 if (val == NULL)
1023 nomem (size);
1024
1025 return (val);
1026 }
1027
1028 PTR /* OK: PTR */
1029 xcalloc (size_t number, size_t size)
1030 {
1031 void *mem;
1032
1033 /* See libiberty/xmalloc.c. This function need's to match that's
1034 semantics. It never returns NULL. */
1035 if (number == 0 || size == 0)
1036 {
1037 number = 1;
1038 size = 1;
1039 }
1040
1041 mem = calloc (number, size); /* OK: xcalloc */
1042 if (mem == NULL)
1043 nomem (number * size);
1044
1045 return mem;
1046 }
1047
1048 void
1049 xfree (void *ptr)
1050 {
1051 if (ptr != NULL)
1052 free (ptr); /* OK: free */
1053 }
1054 \f
1055
1056 /* Like asprintf/vasprintf but get an internal_error if the call
1057 fails. */
1058
1059 char *
1060 xstrprintf (const char *format, ...)
1061 {
1062 char *ret;
1063 va_list args;
1064 va_start (args, format);
1065 ret = xstrvprintf (format, args);
1066 va_end (args);
1067 return ret;
1068 }
1069
1070 void
1071 xasprintf (char **ret, const char *format, ...)
1072 {
1073 va_list args;
1074 va_start (args, format);
1075 (*ret) = xstrvprintf (format, args);
1076 va_end (args);
1077 }
1078
1079 void
1080 xvasprintf (char **ret, const char *format, va_list ap)
1081 {
1082 (*ret) = xstrvprintf (format, ap);
1083 }
1084
1085 char *
1086 xstrvprintf (const char *format, va_list ap)
1087 {
1088 char *ret = NULL;
1089 int status = vasprintf (&ret, format, ap);
1090 /* NULL is returned when there was a memory allocation problem. */
1091 if (ret == NULL)
1092 nomem (0);
1093 /* A negative status (the printed length) with a non-NULL buffer
1094 should never happen, but just to be sure. */
1095 if (status < 0)
1096 internal_error (__FILE__, __LINE__,
1097 "vasprintf call failed (errno %d)", errno);
1098 return ret;
1099 }
1100
1101 /* My replacement for the read system call.
1102 Used like `read' but keeps going if `read' returns too soon. */
1103
1104 int
1105 myread (int desc, char *addr, int len)
1106 {
1107 int val;
1108 int orglen = len;
1109
1110 while (len > 0)
1111 {
1112 val = read (desc, addr, len);
1113 if (val < 0)
1114 return val;
1115 if (val == 0)
1116 return orglen - len;
1117 len -= val;
1118 addr += val;
1119 }
1120 return orglen;
1121 }
1122 \f
1123 /* Make a copy of the string at PTR with SIZE characters
1124 (and add a null character at the end in the copy).
1125 Uses malloc to get the space. Returns the address of the copy. */
1126
1127 char *
1128 savestring (const char *ptr, size_t size)
1129 {
1130 char *p = (char *) xmalloc (size + 1);
1131 memcpy (p, ptr, size);
1132 p[size] = 0;
1133 return p;
1134 }
1135
1136 void
1137 print_spaces (int n, struct ui_file *file)
1138 {
1139 fputs_unfiltered (n_spaces (n), file);
1140 }
1141
1142 /* Print a host address. */
1143
1144 void
1145 gdb_print_host_address (const void *addr, struct ui_file *stream)
1146 {
1147
1148 /* We could use the %p conversion specifier to fprintf if we had any
1149 way of knowing whether this host supports it. But the following
1150 should work on the Alpha and on 32 bit machines. */
1151
1152 fprintf_filtered (stream, "0x%lx", (unsigned long) addr);
1153 }
1154
1155 /* Ask user a y-or-n question and return 1 iff answer is yes.
1156 Takes three args which are given to printf to print the question.
1157 The first, a control string, should end in "? ".
1158 It should not say how to answer, because we do that. */
1159
1160 /* VARARGS */
1161 int
1162 query (const char *ctlstr, ...)
1163 {
1164 va_list args;
1165 int answer;
1166 int ans2;
1167 int retval;
1168
1169 if (deprecated_query_hook)
1170 {
1171 va_start (args, ctlstr);
1172 return deprecated_query_hook (ctlstr, args);
1173 }
1174
1175 /* Automatically answer "yes" if input is not from a terminal. */
1176 if (!input_from_terminal_p ())
1177 return 1;
1178
1179 while (1)
1180 {
1181 wrap_here (""); /* Flush any buffered output */
1182 gdb_flush (gdb_stdout);
1183
1184 if (annotation_level > 1)
1185 printf_filtered ("\n\032\032pre-query\n");
1186
1187 va_start (args, ctlstr);
1188 vfprintf_filtered (gdb_stdout, ctlstr, args);
1189 va_end (args);
1190 printf_filtered ("(y or n) ");
1191
1192 if (annotation_level > 1)
1193 printf_filtered ("\n\032\032query\n");
1194
1195 wrap_here ("");
1196 gdb_flush (gdb_stdout);
1197
1198 answer = fgetc (stdin);
1199 clearerr (stdin); /* in case of C-d */
1200 if (answer == EOF) /* C-d */
1201 {
1202 retval = 1;
1203 break;
1204 }
1205 /* Eat rest of input line, to EOF or newline */
1206 if (answer != '\n')
1207 do
1208 {
1209 ans2 = fgetc (stdin);
1210 clearerr (stdin);
1211 }
1212 while (ans2 != EOF && ans2 != '\n' && ans2 != '\r');
1213
1214 if (answer >= 'a')
1215 answer -= 040;
1216 if (answer == 'Y')
1217 {
1218 retval = 1;
1219 break;
1220 }
1221 if (answer == 'N')
1222 {
1223 retval = 0;
1224 break;
1225 }
1226 printf_filtered ("Please answer y or n.\n");
1227 }
1228
1229 if (annotation_level > 1)
1230 printf_filtered ("\n\032\032post-query\n");
1231 return retval;
1232 }
1233 \f
1234
1235 /* This function supports the nquery() and yquery() functions.
1236 Ask user a y-or-n question and return 0 if answer is no, 1 if
1237 answer is yes, or default the answer to the specified default.
1238 DEFCHAR is either 'y' or 'n' and refers to the default answer.
1239 CTLSTR is the control string and should end in "? ". It should
1240 not say how to answer, because we do that.
1241 ARGS are the arguments passed along with the CTLSTR argument to
1242 printf. */
1243
1244 static int
1245 defaulted_query (const char *ctlstr, const char defchar, va_list args)
1246 {
1247 int answer;
1248 int ans2;
1249 int retval;
1250 int def_value;
1251 char def_answer, not_def_answer;
1252 char *y_string, *n_string;
1253
1254 /* Set up according to which answer is the default. */
1255 if (defchar == 'y')
1256 {
1257 def_value = 1;
1258 def_answer = 'Y';
1259 not_def_answer = 'N';
1260 y_string = "[y]";
1261 n_string = "n";
1262 }
1263 else
1264 {
1265 def_value = 0;
1266 def_answer = 'N';
1267 not_def_answer = 'Y';
1268 y_string = "y";
1269 n_string = "[n]";
1270 }
1271
1272 if (deprecated_query_hook)
1273 {
1274 return deprecated_query_hook (ctlstr, args);
1275 }
1276
1277 /* Automatically answer default value if input is not from a terminal. */
1278 if (!input_from_terminal_p ())
1279 return def_value;
1280
1281 while (1)
1282 {
1283 wrap_here (""); /* Flush any buffered output */
1284 gdb_flush (gdb_stdout);
1285
1286 if (annotation_level > 1)
1287 printf_filtered ("\n\032\032pre-query\n");
1288
1289 vfprintf_filtered (gdb_stdout, ctlstr, args);
1290 printf_filtered ("(%s or %s) ", y_string, n_string);
1291
1292 if (annotation_level > 1)
1293 printf_filtered ("\n\032\032query\n");
1294
1295 wrap_here ("");
1296 gdb_flush (gdb_stdout);
1297
1298 answer = fgetc (stdin);
1299 clearerr (stdin); /* in case of C-d */
1300 if (answer == EOF) /* C-d */
1301 {
1302 retval = def_value;
1303 break;
1304 }
1305 /* Eat rest of input line, to EOF or newline */
1306 if (answer != '\n')
1307 do
1308 {
1309 ans2 = fgetc (stdin);
1310 clearerr (stdin);
1311 }
1312 while (ans2 != EOF && ans2 != '\n' && ans2 != '\r');
1313
1314 if (answer >= 'a')
1315 answer -= 040;
1316 /* Check answer. For the non-default, the user must specify
1317 the non-default explicitly. */
1318 if (answer == not_def_answer)
1319 {
1320 retval = !def_value;
1321 break;
1322 }
1323 /* Otherwise, for the default, the user may either specify
1324 the required input or have it default by entering nothing. */
1325 if (answer == def_answer || answer == '\n' ||
1326 answer == '\r' || answer == EOF)
1327 {
1328 retval = def_value;
1329 break;
1330 }
1331 /* Invalid entries are not defaulted and require another selection. */
1332 printf_filtered ("Please answer %s or %s.\n",
1333 y_string, n_string);
1334 }
1335
1336 if (annotation_level > 1)
1337 printf_filtered ("\n\032\032post-query\n");
1338 return retval;
1339 }
1340 \f
1341
1342 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
1343 answer is yes, or 0 if answer is defaulted.
1344 Takes three args which are given to printf to print the question.
1345 The first, a control string, should end in "? ".
1346 It should not say how to answer, because we do that. */
1347
1348 int
1349 nquery (const char *ctlstr, ...)
1350 {
1351 va_list args;
1352
1353 va_start (args, ctlstr);
1354 return defaulted_query (ctlstr, 'n', args);
1355 va_end (args);
1356 }
1357
1358 /* Ask user a y-or-n question and return 0 if answer is no, 1 if
1359 answer is yes, or 1 if answer is defaulted.
1360 Takes three args which are given to printf to print the question.
1361 The first, a control string, should end in "? ".
1362 It should not say how to answer, because we do that. */
1363
1364 int
1365 yquery (const char *ctlstr, ...)
1366 {
1367 va_list args;
1368
1369 va_start (args, ctlstr);
1370 return defaulted_query (ctlstr, 'y', args);
1371 va_end (args);
1372 }
1373
1374 /* Print an error message saying that we couldn't make sense of a
1375 \^mumble sequence in a string or character constant. START and END
1376 indicate a substring of some larger string that contains the
1377 erroneous backslash sequence, missing the initial backslash. */
1378 static NORETURN int
1379 no_control_char_error (const char *start, const char *end)
1380 {
1381 int len = end - start;
1382 char *copy = alloca (end - start + 1);
1383
1384 memcpy (copy, start, len);
1385 copy[len] = '\0';
1386
1387 error ("There is no control character `\\%s' in the `%s' character set.",
1388 copy, target_charset ());
1389 }
1390
1391 /* Parse a C escape sequence. STRING_PTR points to a variable
1392 containing a pointer to the string to parse. That pointer
1393 should point to the character after the \. That pointer
1394 is updated past the characters we use. The value of the
1395 escape sequence is returned.
1396
1397 A negative value means the sequence \ newline was seen,
1398 which is supposed to be equivalent to nothing at all.
1399
1400 If \ is followed by a null character, we return a negative
1401 value and leave the string pointer pointing at the null character.
1402
1403 If \ is followed by 000, we return 0 and leave the string pointer
1404 after the zeros. A value of 0 does not mean end of string. */
1405
1406 int
1407 parse_escape (char **string_ptr)
1408 {
1409 int target_char;
1410 int c = *(*string_ptr)++;
1411 if (c_parse_backslash (c, &target_char))
1412 return target_char;
1413 else
1414 switch (c)
1415 {
1416 case '\n':
1417 return -2;
1418 case 0:
1419 (*string_ptr)--;
1420 return 0;
1421 case '^':
1422 {
1423 /* Remember where this escape sequence started, for reporting
1424 errors. */
1425 char *sequence_start_pos = *string_ptr - 1;
1426
1427 c = *(*string_ptr)++;
1428
1429 if (c == '?')
1430 {
1431 /* XXXCHARSET: What is `delete' in the host character set? */
1432 c = 0177;
1433
1434 if (!host_char_to_target (c, &target_char))
1435 error ("There is no character corresponding to `Delete' "
1436 "in the target character set `%s'.", host_charset ());
1437
1438 return target_char;
1439 }
1440 else if (c == '\\')
1441 target_char = parse_escape (string_ptr);
1442 else
1443 {
1444 if (!host_char_to_target (c, &target_char))
1445 no_control_char_error (sequence_start_pos, *string_ptr);
1446 }
1447
1448 /* Now target_char is something like `c', and we want to find
1449 its control-character equivalent. */
1450 if (!target_char_to_control_char (target_char, &target_char))
1451 no_control_char_error (sequence_start_pos, *string_ptr);
1452
1453 return target_char;
1454 }
1455
1456 /* XXXCHARSET: we need to use isdigit and value-of-digit
1457 methods of the host character set here. */
1458
1459 case '0':
1460 case '1':
1461 case '2':
1462 case '3':
1463 case '4':
1464 case '5':
1465 case '6':
1466 case '7':
1467 {
1468 int i = c - '0';
1469 int count = 0;
1470 while (++count < 3)
1471 {
1472 c = (**string_ptr);
1473 if (c >= '0' && c <= '7')
1474 {
1475 (*string_ptr)++;
1476 i *= 8;
1477 i += c - '0';
1478 }
1479 else
1480 {
1481 break;
1482 }
1483 }
1484 return i;
1485 }
1486 default:
1487 if (!host_char_to_target (c, &target_char))
1488 error
1489 ("The escape sequence `\%c' is equivalent to plain `%c', which"
1490 " has no equivalent\n" "in the `%s' character set.", c, c,
1491 target_charset ());
1492 return target_char;
1493 }
1494 }
1495 \f
1496 /* Print the character C on STREAM as part of the contents of a literal
1497 string whose delimiter is QUOTER. Note that this routine should only
1498 be call for printing things which are independent of the language
1499 of the program being debugged. */
1500
1501 static void
1502 printchar (int c, void (*do_fputs) (const char *, struct ui_file *),
1503 void (*do_fprintf) (struct ui_file *, const char *, ...),
1504 struct ui_file *stream, int quoter)
1505 {
1506
1507 c &= 0xFF; /* Avoid sign bit follies */
1508
1509 if (c < 0x20 || /* Low control chars */
1510 (c >= 0x7F && c < 0xA0) || /* DEL, High controls */
1511 (sevenbit_strings && c >= 0x80))
1512 { /* high order bit set */
1513 switch (c)
1514 {
1515 case '\n':
1516 do_fputs ("\\n", stream);
1517 break;
1518 case '\b':
1519 do_fputs ("\\b", stream);
1520 break;
1521 case '\t':
1522 do_fputs ("\\t", stream);
1523 break;
1524 case '\f':
1525 do_fputs ("\\f", stream);
1526 break;
1527 case '\r':
1528 do_fputs ("\\r", stream);
1529 break;
1530 case '\033':
1531 do_fputs ("\\e", stream);
1532 break;
1533 case '\007':
1534 do_fputs ("\\a", stream);
1535 break;
1536 default:
1537 do_fprintf (stream, "\\%.3o", (unsigned int) c);
1538 break;
1539 }
1540 }
1541 else
1542 {
1543 if (c == '\\' || c == quoter)
1544 do_fputs ("\\", stream);
1545 do_fprintf (stream, "%c", c);
1546 }
1547 }
1548
1549 /* Print the character C on STREAM as part of the contents of a
1550 literal string whose delimiter is QUOTER. Note that these routines
1551 should only be call for printing things which are independent of
1552 the language of the program being debugged. */
1553
1554 void
1555 fputstr_filtered (const char *str, int quoter, struct ui_file *stream)
1556 {
1557 while (*str)
1558 printchar (*str++, fputs_filtered, fprintf_filtered, stream, quoter);
1559 }
1560
1561 void
1562 fputstr_unfiltered (const char *str, int quoter, struct ui_file *stream)
1563 {
1564 while (*str)
1565 printchar (*str++, fputs_unfiltered, fprintf_unfiltered, stream, quoter);
1566 }
1567
1568 void
1569 fputstrn_unfiltered (const char *str, int n, int quoter,
1570 struct ui_file *stream)
1571 {
1572 int i;
1573 for (i = 0; i < n; i++)
1574 printchar (str[i], fputs_unfiltered, fprintf_unfiltered, stream, quoter);
1575 }
1576 \f
1577
1578 /* Number of lines per page or UINT_MAX if paging is disabled. */
1579 static unsigned int lines_per_page;
1580
1581 /* Number of chars per line or UINT_MAX if line folding is disabled. */
1582 static unsigned int chars_per_line;
1583
1584 /* Current count of lines printed on this page, chars on this line. */
1585 static unsigned int lines_printed, chars_printed;
1586
1587 /* Buffer and start column of buffered text, for doing smarter word-
1588 wrapping. When someone calls wrap_here(), we start buffering output
1589 that comes through fputs_filtered(). If we see a newline, we just
1590 spit it out and forget about the wrap_here(). If we see another
1591 wrap_here(), we spit it out and remember the newer one. If we see
1592 the end of the line, we spit out a newline, the indent, and then
1593 the buffered output. */
1594
1595 /* Malloc'd buffer with chars_per_line+2 bytes. Contains characters which
1596 are waiting to be output (they have already been counted in chars_printed).
1597 When wrap_buffer[0] is null, the buffer is empty. */
1598 static char *wrap_buffer;
1599
1600 /* Pointer in wrap_buffer to the next character to fill. */
1601 static char *wrap_pointer;
1602
1603 /* String to indent by if the wrap occurs. Must not be NULL if wrap_column
1604 is non-zero. */
1605 static char *wrap_indent;
1606
1607 /* Column number on the screen where wrap_buffer begins, or 0 if wrapping
1608 is not in effect. */
1609 static int wrap_column;
1610 \f
1611
1612 /* Inialize the number of lines per page and chars per line. */
1613
1614 void
1615 init_page_info (void)
1616 {
1617 #if defined(TUI)
1618 if (!tui_get_command_dimension (&chars_per_line, &lines_per_page))
1619 #endif
1620 {
1621 int rows, cols;
1622
1623 #if defined(__GO32__)
1624 rows = ScreenRows ();
1625 cols = ScreenCols ();
1626 lines_per_page = rows;
1627 chars_per_line = cols;
1628 #else
1629 /* Make sure Readline has initialized its terminal settings. */
1630 rl_reset_terminal (NULL);
1631
1632 /* Get the screen size from Readline. */
1633 rl_get_screen_size (&rows, &cols);
1634 lines_per_page = rows;
1635 chars_per_line = cols;
1636
1637 /* Readline should have fetched the termcap entry for us. */
1638 if (tgetnum ("li") < 0 || getenv ("EMACS"))
1639 {
1640 /* The number of lines per page is not mentioned in the
1641 terminal description. This probably means that paging is
1642 not useful (e.g. emacs shell window), so disable paging. */
1643 lines_per_page = UINT_MAX;
1644 }
1645
1646 /* FIXME: Get rid of this junk. */
1647 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1648 SIGWINCH_HANDLER (SIGWINCH);
1649 #endif
1650
1651 /* If the output is not a terminal, don't paginate it. */
1652 if (!ui_file_isatty (gdb_stdout))
1653 lines_per_page = UINT_MAX;
1654 #endif
1655 }
1656
1657 set_screen_size ();
1658 set_width ();
1659 }
1660
1661 /* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */
1662
1663 static void
1664 set_screen_size (void)
1665 {
1666 int rows = lines_per_page;
1667 int cols = chars_per_line;
1668
1669 if (rows <= 0)
1670 rows = INT_MAX;
1671
1672 if (cols <= 0)
1673 rl_get_screen_size (NULL, &cols);
1674
1675 /* Update Readline's idea of the terminal size. */
1676 rl_set_screen_size (rows, cols);
1677 }
1678
1679 /* Reinitialize WRAP_BUFFER according to the current value of
1680 CHARS_PER_LINE. */
1681
1682 static void
1683 set_width (void)
1684 {
1685 if (chars_per_line == 0)
1686 init_page_info ();
1687
1688 if (!wrap_buffer)
1689 {
1690 wrap_buffer = (char *) xmalloc (chars_per_line + 2);
1691 wrap_buffer[0] = '\0';
1692 }
1693 else
1694 wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2);
1695 wrap_pointer = wrap_buffer; /* Start it at the beginning. */
1696 }
1697
1698 static void
1699 set_width_command (char *args, int from_tty, struct cmd_list_element *c)
1700 {
1701 set_screen_size ();
1702 set_width ();
1703 }
1704
1705 static void
1706 set_height_command (char *args, int from_tty, struct cmd_list_element *c)
1707 {
1708 set_screen_size ();
1709 }
1710
1711 /* Wait, so the user can read what's on the screen. Prompt the user
1712 to continue by pressing RETURN. */
1713
1714 static void
1715 prompt_for_continue (void)
1716 {
1717 char *ignore;
1718 char cont_prompt[120];
1719
1720 if (annotation_level > 1)
1721 printf_unfiltered ("\n\032\032pre-prompt-for-continue\n");
1722
1723 strcpy (cont_prompt,
1724 "---Type <return> to continue, or q <return> to quit---");
1725 if (annotation_level > 1)
1726 strcat (cont_prompt, "\n\032\032prompt-for-continue\n");
1727
1728 /* We must do this *before* we call gdb_readline, else it will eventually
1729 call us -- thinking that we're trying to print beyond the end of the
1730 screen. */
1731 reinitialize_more_filter ();
1732
1733 immediate_quit++;
1734 /* On a real operating system, the user can quit with SIGINT.
1735 But not on GO32.
1736
1737 'q' is provided on all systems so users don't have to change habits
1738 from system to system, and because telling them what to do in
1739 the prompt is more user-friendly than expecting them to think of
1740 SIGINT. */
1741 /* Call readline, not gdb_readline, because GO32 readline handles control-C
1742 whereas control-C to gdb_readline will cause the user to get dumped
1743 out to DOS. */
1744 ignore = gdb_readline_wrapper (cont_prompt);
1745
1746 if (annotation_level > 1)
1747 printf_unfiltered ("\n\032\032post-prompt-for-continue\n");
1748
1749 if (ignore)
1750 {
1751 char *p = ignore;
1752 while (*p == ' ' || *p == '\t')
1753 ++p;
1754 if (p[0] == 'q')
1755 async_request_quit (0);
1756 xfree (ignore);
1757 }
1758 immediate_quit--;
1759
1760 /* Now we have to do this again, so that GDB will know that it doesn't
1761 need to save the ---Type <return>--- line at the top of the screen. */
1762 reinitialize_more_filter ();
1763
1764 dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
1765 }
1766
1767 /* Reinitialize filter; ie. tell it to reset to original values. */
1768
1769 void
1770 reinitialize_more_filter (void)
1771 {
1772 lines_printed = 0;
1773 chars_printed = 0;
1774 }
1775
1776 /* Indicate that if the next sequence of characters overflows the line,
1777 a newline should be inserted here rather than when it hits the end.
1778 If INDENT is non-null, it is a string to be printed to indent the
1779 wrapped part on the next line. INDENT must remain accessible until
1780 the next call to wrap_here() or until a newline is printed through
1781 fputs_filtered().
1782
1783 If the line is already overfull, we immediately print a newline and
1784 the indentation, and disable further wrapping.
1785
1786 If we don't know the width of lines, but we know the page height,
1787 we must not wrap words, but should still keep track of newlines
1788 that were explicitly printed.
1789
1790 INDENT should not contain tabs, as that will mess up the char count
1791 on the next line. FIXME.
1792
1793 This routine is guaranteed to force out any output which has been
1794 squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be
1795 used to force out output from the wrap_buffer. */
1796
1797 void
1798 wrap_here (char *indent)
1799 {
1800 /* This should have been allocated, but be paranoid anyway. */
1801 if (!wrap_buffer)
1802 internal_error (__FILE__, __LINE__, "failed internal consistency check");
1803
1804 if (wrap_buffer[0])
1805 {
1806 *wrap_pointer = '\0';
1807 fputs_unfiltered (wrap_buffer, gdb_stdout);
1808 }
1809 wrap_pointer = wrap_buffer;
1810 wrap_buffer[0] = '\0';
1811 if (chars_per_line == UINT_MAX) /* No line overflow checking */
1812 {
1813 wrap_column = 0;
1814 }
1815 else if (chars_printed >= chars_per_line)
1816 {
1817 puts_filtered ("\n");
1818 if (indent != NULL)
1819 puts_filtered (indent);
1820 wrap_column = 0;
1821 }
1822 else
1823 {
1824 wrap_column = chars_printed;
1825 if (indent == NULL)
1826 wrap_indent = "";
1827 else
1828 wrap_indent = indent;
1829 }
1830 }
1831
1832 /* Print input string to gdb_stdout, filtered, with wrap,
1833 arranging strings in columns of n chars. String can be
1834 right or left justified in the column. Never prints
1835 trailing spaces. String should never be longer than
1836 width. FIXME: this could be useful for the EXAMINE
1837 command, which currently doesn't tabulate very well */
1838
1839 void
1840 puts_filtered_tabular (char *string, int width, int right)
1841 {
1842 int spaces = 0;
1843 int stringlen;
1844 char *spacebuf;
1845
1846 gdb_assert (chars_per_line > 0);
1847 if (chars_per_line == UINT_MAX)
1848 {
1849 fputs_filtered (string, gdb_stdout);
1850 fputs_filtered ("\n", gdb_stdout);
1851 return;
1852 }
1853
1854 if (((chars_printed - 1) / width + 2) * width >= chars_per_line)
1855 fputs_filtered ("\n", gdb_stdout);
1856
1857 if (width >= chars_per_line)
1858 width = chars_per_line - 1;
1859
1860 stringlen = strlen (string);
1861
1862 if (chars_printed > 0)
1863 spaces = width - (chars_printed - 1) % width - 1;
1864 if (right)
1865 spaces += width - stringlen;
1866
1867 spacebuf = alloca (spaces + 1);
1868 spacebuf[spaces] = '\0';
1869 while (spaces--)
1870 spacebuf[spaces] = ' ';
1871
1872 fputs_filtered (spacebuf, gdb_stdout);
1873 fputs_filtered (string, gdb_stdout);
1874 }
1875
1876
1877 /* Ensure that whatever gets printed next, using the filtered output
1878 commands, starts at the beginning of the line. I.E. if there is
1879 any pending output for the current line, flush it and start a new
1880 line. Otherwise do nothing. */
1881
1882 void
1883 begin_line (void)
1884 {
1885 if (chars_printed > 0)
1886 {
1887 puts_filtered ("\n");
1888 }
1889 }
1890
1891
1892 /* Like fputs but if FILTER is true, pause after every screenful.
1893
1894 Regardless of FILTER can wrap at points other than the final
1895 character of a line.
1896
1897 Unlike fputs, fputs_maybe_filtered does not return a value.
1898 It is OK for LINEBUFFER to be NULL, in which case just don't print
1899 anything.
1900
1901 Note that a longjmp to top level may occur in this routine (only if
1902 FILTER is true) (since prompt_for_continue may do so) so this
1903 routine should not be called when cleanups are not in place. */
1904
1905 static void
1906 fputs_maybe_filtered (const char *linebuffer, struct ui_file *stream,
1907 int filter)
1908 {
1909 const char *lineptr;
1910
1911 if (linebuffer == 0)
1912 return;
1913
1914 /* Don't do any filtering if it is disabled. */
1915 if ((stream != gdb_stdout) || !pagination_enabled
1916 || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX))
1917 {
1918 fputs_unfiltered (linebuffer, stream);
1919 return;
1920 }
1921
1922 /* Go through and output each character. Show line extension
1923 when this is necessary; prompt user for new page when this is
1924 necessary. */
1925
1926 lineptr = linebuffer;
1927 while (*lineptr)
1928 {
1929 /* Possible new page. */
1930 if (filter && (lines_printed >= lines_per_page - 1))
1931 prompt_for_continue ();
1932
1933 while (*lineptr && *lineptr != '\n')
1934 {
1935 /* Print a single line. */
1936 if (*lineptr == '\t')
1937 {
1938 if (wrap_column)
1939 *wrap_pointer++ = '\t';
1940 else
1941 fputc_unfiltered ('\t', stream);
1942 /* Shifting right by 3 produces the number of tab stops
1943 we have already passed, and then adding one and
1944 shifting left 3 advances to the next tab stop. */
1945 chars_printed = ((chars_printed >> 3) + 1) << 3;
1946 lineptr++;
1947 }
1948 else
1949 {
1950 if (wrap_column)
1951 *wrap_pointer++ = *lineptr;
1952 else
1953 fputc_unfiltered (*lineptr, stream);
1954 chars_printed++;
1955 lineptr++;
1956 }
1957
1958 if (chars_printed >= chars_per_line)
1959 {
1960 unsigned int save_chars = chars_printed;
1961
1962 chars_printed = 0;
1963 lines_printed++;
1964 /* If we aren't actually wrapping, don't output newline --
1965 if chars_per_line is right, we probably just overflowed
1966 anyway; if it's wrong, let us keep going. */
1967 if (wrap_column)
1968 fputc_unfiltered ('\n', stream);
1969
1970 /* Possible new page. */
1971 if (lines_printed >= lines_per_page - 1)
1972 prompt_for_continue ();
1973
1974 /* Now output indentation and wrapped string */
1975 if (wrap_column)
1976 {
1977 fputs_unfiltered (wrap_indent, stream);
1978 *wrap_pointer = '\0'; /* Null-terminate saved stuff */
1979 fputs_unfiltered (wrap_buffer, stream); /* and eject it */
1980 /* FIXME, this strlen is what prevents wrap_indent from
1981 containing tabs. However, if we recurse to print it
1982 and count its chars, we risk trouble if wrap_indent is
1983 longer than (the user settable) chars_per_line.
1984 Note also that this can set chars_printed > chars_per_line
1985 if we are printing a long string. */
1986 chars_printed = strlen (wrap_indent)
1987 + (save_chars - wrap_column);
1988 wrap_pointer = wrap_buffer; /* Reset buffer */
1989 wrap_buffer[0] = '\0';
1990 wrap_column = 0; /* And disable fancy wrap */
1991 }
1992 }
1993 }
1994
1995 if (*lineptr == '\n')
1996 {
1997 chars_printed = 0;
1998 wrap_here ((char *) 0); /* Spit out chars, cancel further wraps */
1999 lines_printed++;
2000 fputc_unfiltered ('\n', stream);
2001 lineptr++;
2002 }
2003 }
2004 }
2005
2006 void
2007 fputs_filtered (const char *linebuffer, struct ui_file *stream)
2008 {
2009 fputs_maybe_filtered (linebuffer, stream, 1);
2010 }
2011
2012 int
2013 putchar_unfiltered (int c)
2014 {
2015 char buf = c;
2016 ui_file_write (gdb_stdout, &buf, 1);
2017 return c;
2018 }
2019
2020 /* Write character C to gdb_stdout using GDB's paging mechanism and return C.
2021 May return nonlocally. */
2022
2023 int
2024 putchar_filtered (int c)
2025 {
2026 return fputc_filtered (c, gdb_stdout);
2027 }
2028
2029 int
2030 fputc_unfiltered (int c, struct ui_file *stream)
2031 {
2032 char buf = c;
2033 ui_file_write (stream, &buf, 1);
2034 return c;
2035 }
2036
2037 int
2038 fputc_filtered (int c, struct ui_file *stream)
2039 {
2040 char buf[2];
2041
2042 buf[0] = c;
2043 buf[1] = 0;
2044 fputs_filtered (buf, stream);
2045 return c;
2046 }
2047
2048 /* puts_debug is like fputs_unfiltered, except it prints special
2049 characters in printable fashion. */
2050
2051 void
2052 puts_debug (char *prefix, char *string, char *suffix)
2053 {
2054 int ch;
2055
2056 /* Print prefix and suffix after each line. */
2057 static int new_line = 1;
2058 static int return_p = 0;
2059 static char *prev_prefix = "";
2060 static char *prev_suffix = "";
2061
2062 if (*string == '\n')
2063 return_p = 0;
2064
2065 /* If the prefix is changing, print the previous suffix, a new line,
2066 and the new prefix. */
2067 if ((return_p || (strcmp (prev_prefix, prefix) != 0)) && !new_line)
2068 {
2069 fputs_unfiltered (prev_suffix, gdb_stdlog);
2070 fputs_unfiltered ("\n", gdb_stdlog);
2071 fputs_unfiltered (prefix, gdb_stdlog);
2072 }
2073
2074 /* Print prefix if we printed a newline during the previous call. */
2075 if (new_line)
2076 {
2077 new_line = 0;
2078 fputs_unfiltered (prefix, gdb_stdlog);
2079 }
2080
2081 prev_prefix = prefix;
2082 prev_suffix = suffix;
2083
2084 /* Output characters in a printable format. */
2085 while ((ch = *string++) != '\0')
2086 {
2087 switch (ch)
2088 {
2089 default:
2090 if (isprint (ch))
2091 fputc_unfiltered (ch, gdb_stdlog);
2092
2093 else
2094 fprintf_unfiltered (gdb_stdlog, "\\x%02x", ch & 0xff);
2095 break;
2096
2097 case '\\':
2098 fputs_unfiltered ("\\\\", gdb_stdlog);
2099 break;
2100 case '\b':
2101 fputs_unfiltered ("\\b", gdb_stdlog);
2102 break;
2103 case '\f':
2104 fputs_unfiltered ("\\f", gdb_stdlog);
2105 break;
2106 case '\n':
2107 new_line = 1;
2108 fputs_unfiltered ("\\n", gdb_stdlog);
2109 break;
2110 case '\r':
2111 fputs_unfiltered ("\\r", gdb_stdlog);
2112 break;
2113 case '\t':
2114 fputs_unfiltered ("\\t", gdb_stdlog);
2115 break;
2116 case '\v':
2117 fputs_unfiltered ("\\v", gdb_stdlog);
2118 break;
2119 }
2120
2121 return_p = ch == '\r';
2122 }
2123
2124 /* Print suffix if we printed a newline. */
2125 if (new_line)
2126 {
2127 fputs_unfiltered (suffix, gdb_stdlog);
2128 fputs_unfiltered ("\n", gdb_stdlog);
2129 }
2130 }
2131
2132
2133 /* Print a variable number of ARGS using format FORMAT. If this
2134 information is going to put the amount written (since the last call
2135 to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
2136 call prompt_for_continue to get the users permision to continue.
2137
2138 Unlike fprintf, this function does not return a value.
2139
2140 We implement three variants, vfprintf (takes a vararg list and stream),
2141 fprintf (takes a stream to write on), and printf (the usual).
2142
2143 Note also that a longjmp to top level may occur in this routine
2144 (since prompt_for_continue may do so) so this routine should not be
2145 called when cleanups are not in place. */
2146
2147 static void
2148 vfprintf_maybe_filtered (struct ui_file *stream, const char *format,
2149 va_list args, int filter)
2150 {
2151 char *linebuffer;
2152 struct cleanup *old_cleanups;
2153
2154 linebuffer = xstrvprintf (format, args);
2155 old_cleanups = make_cleanup (xfree, linebuffer);
2156 fputs_maybe_filtered (linebuffer, stream, filter);
2157 do_cleanups (old_cleanups);
2158 }
2159
2160
2161 void
2162 vfprintf_filtered (struct ui_file *stream, const char *format, va_list args)
2163 {
2164 vfprintf_maybe_filtered (stream, format, args, 1);
2165 }
2166
2167 void
2168 vfprintf_unfiltered (struct ui_file *stream, const char *format, va_list args)
2169 {
2170 char *linebuffer;
2171 struct cleanup *old_cleanups;
2172
2173 linebuffer = xstrvprintf (format, args);
2174 old_cleanups = make_cleanup (xfree, linebuffer);
2175 fputs_unfiltered (linebuffer, stream);
2176 do_cleanups (old_cleanups);
2177 }
2178
2179 void
2180 vprintf_filtered (const char *format, va_list args)
2181 {
2182 vfprintf_maybe_filtered (gdb_stdout, format, args, 1);
2183 }
2184
2185 void
2186 vprintf_unfiltered (const char *format, va_list args)
2187 {
2188 vfprintf_unfiltered (gdb_stdout, format, args);
2189 }
2190
2191 void
2192 fprintf_filtered (struct ui_file *stream, const char *format, ...)
2193 {
2194 va_list args;
2195 va_start (args, format);
2196 vfprintf_filtered (stream, format, args);
2197 va_end (args);
2198 }
2199
2200 void
2201 fprintf_unfiltered (struct ui_file *stream, const char *format, ...)
2202 {
2203 va_list args;
2204 va_start (args, format);
2205 vfprintf_unfiltered (stream, format, args);
2206 va_end (args);
2207 }
2208
2209 /* Like fprintf_filtered, but prints its result indented.
2210 Called as fprintfi_filtered (spaces, stream, format, ...); */
2211
2212 void
2213 fprintfi_filtered (int spaces, struct ui_file *stream, const char *format,
2214 ...)
2215 {
2216 va_list args;
2217 va_start (args, format);
2218 print_spaces_filtered (spaces, stream);
2219
2220 vfprintf_filtered (stream, format, args);
2221 va_end (args);
2222 }
2223
2224
2225 void
2226 printf_filtered (const char *format, ...)
2227 {
2228 va_list args;
2229 va_start (args, format);
2230 vfprintf_filtered (gdb_stdout, format, args);
2231 va_end (args);
2232 }
2233
2234
2235 void
2236 printf_unfiltered (const char *format, ...)
2237 {
2238 va_list args;
2239 va_start (args, format);
2240 vfprintf_unfiltered (gdb_stdout, format, args);
2241 va_end (args);
2242 }
2243
2244 /* Like printf_filtered, but prints it's result indented.
2245 Called as printfi_filtered (spaces, format, ...); */
2246
2247 void
2248 printfi_filtered (int spaces, const char *format, ...)
2249 {
2250 va_list args;
2251 va_start (args, format);
2252 print_spaces_filtered (spaces, gdb_stdout);
2253 vfprintf_filtered (gdb_stdout, format, args);
2254 va_end (args);
2255 }
2256
2257 /* Easy -- but watch out!
2258
2259 This routine is *not* a replacement for puts()! puts() appends a newline.
2260 This one doesn't, and had better not! */
2261
2262 void
2263 puts_filtered (const char *string)
2264 {
2265 fputs_filtered (string, gdb_stdout);
2266 }
2267
2268 void
2269 puts_unfiltered (const char *string)
2270 {
2271 fputs_unfiltered (string, gdb_stdout);
2272 }
2273
2274 /* Return a pointer to N spaces and a null. The pointer is good
2275 until the next call to here. */
2276 char *
2277 n_spaces (int n)
2278 {
2279 char *t;
2280 static char *spaces = 0;
2281 static int max_spaces = -1;
2282
2283 if (n > max_spaces)
2284 {
2285 if (spaces)
2286 xfree (spaces);
2287 spaces = (char *) xmalloc (n + 1);
2288 for (t = spaces + n; t != spaces;)
2289 *--t = ' ';
2290 spaces[n] = '\0';
2291 max_spaces = n;
2292 }
2293
2294 return spaces + max_spaces - n;
2295 }
2296
2297 /* Print N spaces. */
2298 void
2299 print_spaces_filtered (int n, struct ui_file *stream)
2300 {
2301 fputs_filtered (n_spaces (n), stream);
2302 }
2303 \f
2304 /* C++/ObjC demangler stuff. */
2305
2306 /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
2307 LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
2308 If the name is not mangled, or the language for the name is unknown, or
2309 demangling is off, the name is printed in its "raw" form. */
2310
2311 void
2312 fprintf_symbol_filtered (struct ui_file *stream, char *name,
2313 enum language lang, int arg_mode)
2314 {
2315 char *demangled;
2316
2317 if (name != NULL)
2318 {
2319 /* If user wants to see raw output, no problem. */
2320 if (!demangle)
2321 {
2322 fputs_filtered (name, stream);
2323 }
2324 else
2325 {
2326 demangled = language_demangle (language_def (lang), name, arg_mode);
2327 fputs_filtered (demangled ? demangled : name, stream);
2328 if (demangled != NULL)
2329 {
2330 xfree (demangled);
2331 }
2332 }
2333 }
2334 }
2335
2336 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
2337 differences in whitespace. Returns 0 if they match, non-zero if they
2338 don't (slightly different than strcmp()'s range of return values).
2339
2340 As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO".
2341 This "feature" is useful when searching for matching C++ function names
2342 (such as if the user types 'break FOO', where FOO is a mangled C++
2343 function). */
2344
2345 int
2346 strcmp_iw (const char *string1, const char *string2)
2347 {
2348 while ((*string1 != '\0') && (*string2 != '\0'))
2349 {
2350 while (isspace (*string1))
2351 {
2352 string1++;
2353 }
2354 while (isspace (*string2))
2355 {
2356 string2++;
2357 }
2358 if (*string1 != *string2)
2359 {
2360 break;
2361 }
2362 if (*string1 != '\0')
2363 {
2364 string1++;
2365 string2++;
2366 }
2367 }
2368 return (*string1 != '\0' && *string1 != '(') || (*string2 != '\0');
2369 }
2370
2371 /* This is like strcmp except that it ignores whitespace and treats
2372 '(' as the first non-NULL character in terms of ordering. Like
2373 strcmp (and unlike strcmp_iw), it returns negative if STRING1 <
2374 STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2
2375 according to that ordering.
2376
2377 If a list is sorted according to this function and if you want to
2378 find names in the list that match some fixed NAME according to
2379 strcmp_iw(LIST_ELT, NAME), then the place to start looking is right
2380 where this function would put NAME.
2381
2382 Here are some examples of why using strcmp to sort is a bad idea:
2383
2384 Whitespace example:
2385
2386 Say your partial symtab contains: "foo<char *>", "goo". Then, if
2387 we try to do a search for "foo<char*>", strcmp will locate this
2388 after "foo<char *>" and before "goo". Then lookup_partial_symbol
2389 will start looking at strings beginning with "goo", and will never
2390 see the correct match of "foo<char *>".
2391
2392 Parenthesis example:
2393
2394 In practice, this is less like to be an issue, but I'll give it a
2395 shot. Let's assume that '$' is a legitimate character to occur in
2396 symbols. (Which may well even be the case on some systems.) Then
2397 say that the partial symbol table contains "foo$" and "foo(int)".
2398 strcmp will put them in this order, since '$' < '('. Now, if the
2399 user searches for "foo", then strcmp will sort "foo" before "foo$".
2400 Then lookup_partial_symbol will notice that strcmp_iw("foo$",
2401 "foo") is false, so it won't proceed to the actual match of
2402 "foo(int)" with "foo". */
2403
2404 int
2405 strcmp_iw_ordered (const char *string1, const char *string2)
2406 {
2407 while ((*string1 != '\0') && (*string2 != '\0'))
2408 {
2409 while (isspace (*string1))
2410 {
2411 string1++;
2412 }
2413 while (isspace (*string2))
2414 {
2415 string2++;
2416 }
2417 if (*string1 != *string2)
2418 {
2419 break;
2420 }
2421 if (*string1 != '\0')
2422 {
2423 string1++;
2424 string2++;
2425 }
2426 }
2427
2428 switch (*string1)
2429 {
2430 /* Characters are non-equal unless they're both '\0'; we want to
2431 make sure we get the comparison right according to our
2432 comparison in the cases where one of them is '\0' or '('. */
2433 case '\0':
2434 if (*string2 == '\0')
2435 return 0;
2436 else
2437 return -1;
2438 case '(':
2439 if (*string2 == '\0')
2440 return 1;
2441 else
2442 return -1;
2443 default:
2444 if (*string2 == '(')
2445 return 1;
2446 else
2447 return *string1 - *string2;
2448 }
2449 }
2450
2451 /* A simple comparison function with opposite semantics to strcmp. */
2452
2453 int
2454 streq (const char *lhs, const char *rhs)
2455 {
2456 return !strcmp (lhs, rhs);
2457 }
2458 \f
2459
2460 /*
2461 ** subset_compare()
2462 ** Answer whether string_to_compare is a full or partial match to
2463 ** template_string. The partial match must be in sequence starting
2464 ** at index 0.
2465 */
2466 int
2467 subset_compare (char *string_to_compare, char *template_string)
2468 {
2469 int match;
2470 if (template_string != (char *) NULL && string_to_compare != (char *) NULL
2471 && strlen (string_to_compare) <= strlen (template_string))
2472 match =
2473 (strncmp
2474 (template_string, string_to_compare, strlen (string_to_compare)) == 0);
2475 else
2476 match = 0;
2477 return match;
2478 }
2479
2480
2481 static void pagination_on_command (char *arg, int from_tty);
2482 static void
2483 pagination_on_command (char *arg, int from_tty)
2484 {
2485 pagination_enabled = 1;
2486 }
2487
2488 static void pagination_on_command (char *arg, int from_tty);
2489 static void
2490 pagination_off_command (char *arg, int from_tty)
2491 {
2492 pagination_enabled = 0;
2493 }
2494 \f
2495
2496 void
2497 initialize_utils (void)
2498 {
2499 struct cmd_list_element *c;
2500
2501 c = add_set_cmd ("width", class_support, var_uinteger, &chars_per_line,
2502 "Set number of characters gdb thinks are in a line.",
2503 &setlist);
2504 deprecated_add_show_from_set (c, &showlist);
2505 set_cmd_sfunc (c, set_width_command);
2506
2507 c = add_set_cmd ("height", class_support, var_uinteger, &lines_per_page,
2508 "Set number of lines gdb thinks are in a page.", &setlist);
2509 deprecated_add_show_from_set (c, &showlist);
2510 set_cmd_sfunc (c, set_height_command);
2511
2512 init_page_info ();
2513
2514 deprecated_add_show_from_set
2515 (add_set_cmd ("demangle", class_support, var_boolean,
2516 (char *) &demangle,
2517 "Set demangling of encoded C++/ObjC names when displaying symbols.",
2518 &setprintlist), &showprintlist);
2519
2520 deprecated_add_show_from_set
2521 (add_set_cmd ("pagination", class_support,
2522 var_boolean, (char *) &pagination_enabled,
2523 "Set state of pagination.", &setlist), &showlist);
2524
2525 if (xdb_commands)
2526 {
2527 add_com ("am", class_support, pagination_on_command,
2528 "Enable pagination");
2529 add_com ("sm", class_support, pagination_off_command,
2530 "Disable pagination");
2531 }
2532
2533 deprecated_add_show_from_set
2534 (add_set_cmd ("sevenbit-strings", class_support, var_boolean,
2535 (char *) &sevenbit_strings,
2536 "Set printing of 8-bit characters in strings as \\nnn.",
2537 &setprintlist), &showprintlist);
2538
2539 deprecated_add_show_from_set
2540 (add_set_cmd ("asm-demangle", class_support, var_boolean,
2541 (char *) &asm_demangle,
2542 "Set demangling of C++/ObjC names in disassembly listings.",
2543 &setprintlist), &showprintlist);
2544 }
2545
2546 /* Machine specific function to handle SIGWINCH signal. */
2547
2548 #ifdef SIGWINCH_HANDLER_BODY
2549 SIGWINCH_HANDLER_BODY
2550 #endif
2551 /* print routines to handle variable size regs, etc. */
2552 /* temporary storage using circular buffer */
2553 #define NUMCELLS 16
2554 #define CELLSIZE 50
2555 static char *
2556 get_cell (void)
2557 {
2558 static char buf[NUMCELLS][CELLSIZE];
2559 static int cell = 0;
2560 if (++cell >= NUMCELLS)
2561 cell = 0;
2562 return buf[cell];
2563 }
2564
2565 int
2566 strlen_paddr (void)
2567 {
2568 return (TARGET_ADDR_BIT / 8 * 2);
2569 }
2570
2571 char *
2572 paddr (CORE_ADDR addr)
2573 {
2574 return phex (addr, TARGET_ADDR_BIT / 8);
2575 }
2576
2577 char *
2578 paddr_nz (CORE_ADDR addr)
2579 {
2580 return phex_nz (addr, TARGET_ADDR_BIT / 8);
2581 }
2582
2583 static void
2584 decimal2str (char *paddr_str, char *sign, ULONGEST addr, int width)
2585 {
2586 /* steal code from valprint.c:print_decimal(). Should this worry
2587 about the real size of addr as the above does? */
2588 unsigned long temp[3];
2589 int i = 0;
2590 do
2591 {
2592 temp[i] = addr % (1000 * 1000 * 1000);
2593 addr /= (1000 * 1000 * 1000);
2594 i++;
2595 width -= 9;
2596 }
2597 while (addr != 0 && i < (sizeof (temp) / sizeof (temp[0])));
2598 width += 9;
2599 if (width < 0)
2600 width = 0;
2601 switch (i)
2602 {
2603 case 1:
2604 sprintf (paddr_str, "%s%0*lu", sign, width, temp[0]);
2605 break;
2606 case 2:
2607 sprintf (paddr_str, "%s%0*lu%09lu", sign, width, temp[1], temp[0]);
2608 break;
2609 case 3:
2610 sprintf (paddr_str, "%s%0*lu%09lu%09lu", sign, width,
2611 temp[2], temp[1], temp[0]);
2612 break;
2613 default:
2614 internal_error (__FILE__, __LINE__,
2615 "failed internal consistency check");
2616 }
2617 }
2618
2619 static void
2620 octal2str (char *paddr_str, ULONGEST addr, int width)
2621 {
2622 unsigned long temp[3];
2623 int i = 0;
2624 do
2625 {
2626 temp[i] = addr % (0100000 * 0100000);
2627 addr /= (0100000 * 0100000);
2628 i++;
2629 width -= 10;
2630 }
2631 while (addr != 0 && i < (sizeof (temp) / sizeof (temp[0])));
2632 width += 10;
2633 if (width < 0)
2634 width = 0;
2635 switch (i)
2636 {
2637 case 1:
2638 if (temp[0] == 0)
2639 sprintf (paddr_str, "%*o", width, 0);
2640 else
2641 sprintf (paddr_str, "0%0*lo", width, temp[0]);
2642 break;
2643 case 2:
2644 sprintf (paddr_str, "0%0*lo%010lo", width, temp[1], temp[0]);
2645 break;
2646 case 3:
2647 sprintf (paddr_str, "0%0*lo%010lo%010lo", width,
2648 temp[2], temp[1], temp[0]);
2649 break;
2650 default:
2651 internal_error (__FILE__, __LINE__,
2652 "failed internal consistency check");
2653 }
2654 }
2655
2656 char *
2657 paddr_u (CORE_ADDR addr)
2658 {
2659 char *paddr_str = get_cell ();
2660 decimal2str (paddr_str, "", addr, 0);
2661 return paddr_str;
2662 }
2663
2664 char *
2665 paddr_d (LONGEST addr)
2666 {
2667 char *paddr_str = get_cell ();
2668 if (addr < 0)
2669 decimal2str (paddr_str, "-", -addr, 0);
2670 else
2671 decimal2str (paddr_str, "", addr, 0);
2672 return paddr_str;
2673 }
2674
2675 /* eliminate warning from compiler on 32-bit systems */
2676 static int thirty_two = 32;
2677
2678 char *
2679 phex (ULONGEST l, int sizeof_l)
2680 {
2681 char *str;
2682 switch (sizeof_l)
2683 {
2684 case 8:
2685 str = get_cell ();
2686 sprintf (str, "%08lx%08lx",
2687 (unsigned long) (l >> thirty_two),
2688 (unsigned long) (l & 0xffffffff));
2689 break;
2690 case 4:
2691 str = get_cell ();
2692 sprintf (str, "%08lx", (unsigned long) l);
2693 break;
2694 case 2:
2695 str = get_cell ();
2696 sprintf (str, "%04x", (unsigned short) (l & 0xffff));
2697 break;
2698 default:
2699 str = phex (l, sizeof (l));
2700 break;
2701 }
2702 return str;
2703 }
2704
2705 char *
2706 phex_nz (ULONGEST l, int sizeof_l)
2707 {
2708 char *str;
2709 switch (sizeof_l)
2710 {
2711 case 8:
2712 {
2713 unsigned long high = (unsigned long) (l >> thirty_two);
2714 str = get_cell ();
2715 if (high == 0)
2716 sprintf (str, "%lx", (unsigned long) (l & 0xffffffff));
2717 else
2718 sprintf (str, "%lx%08lx", high, (unsigned long) (l & 0xffffffff));
2719 break;
2720 }
2721 case 4:
2722 str = get_cell ();
2723 sprintf (str, "%lx", (unsigned long) l);
2724 break;
2725 case 2:
2726 str = get_cell ();
2727 sprintf (str, "%x", (unsigned short) (l & 0xffff));
2728 break;
2729 default:
2730 str = phex_nz (l, sizeof (l));
2731 break;
2732 }
2733 return str;
2734 }
2735
2736 /* Converts a LONGEST to a C-format hexadecimal literal and stores it
2737 in a static string. Returns a pointer to this string. */
2738 char *
2739 hex_string (LONGEST num)
2740 {
2741 char *result = get_cell ();
2742 snprintf (result, CELLSIZE, "0x%s", phex_nz (num, sizeof (num)));
2743 return result;
2744 }
2745
2746 /* Converts a LONGEST number to a C-format hexadecimal literal and
2747 stores it in a static string. Returns a pointer to this string
2748 that is valid until the next call. The number is padded on the
2749 left with 0s to at least WIDTH characters. */
2750 char *
2751 hex_string_custom (LONGEST num, int width)
2752 {
2753 char *result = get_cell ();
2754 char *result_end = result + CELLSIZE - 1;
2755 const char *hex = phex_nz (num, sizeof (num));
2756 int hex_len = strlen (hex);
2757
2758 if (hex_len > width)
2759 width = hex_len;
2760 if (width + 2 >= CELLSIZE)
2761 internal_error (__FILE__, __LINE__,
2762 "hex_string_custom: insufficient space to store result");
2763
2764 strcpy (result_end - width - 2, "0x");
2765 memset (result_end - width, '0', width);
2766 strcpy (result_end - hex_len, hex);
2767 return result_end - width - 2;
2768 }
2769
2770 /* Convert VAL to a numeral in the given radix. For
2771 * radix 10, IS_SIGNED may be true, indicating a signed quantity;
2772 * otherwise VAL is interpreted as unsigned. If WIDTH is supplied,
2773 * it is the minimum width (0-padded if needed). USE_C_FORMAT means
2774 * to use C format in all cases. If it is false, then 'x'
2775 * and 'o' formats do not include a prefix (0x or leading 0). */
2776
2777 char *
2778 int_string (LONGEST val, int radix, int is_signed, int width,
2779 int use_c_format)
2780 {
2781 switch (radix)
2782 {
2783 case 16:
2784 {
2785 char *result;
2786 if (width == 0)
2787 result = hex_string (val);
2788 else
2789 result = hex_string_custom (val, width);
2790 if (! use_c_format)
2791 result += 2;
2792 return result;
2793 }
2794 case 10:
2795 {
2796 char *result = get_cell ();
2797 if (is_signed && val < 0)
2798 decimal2str (result, "-", -val, width);
2799 else
2800 decimal2str (result, "", val, width);
2801 return result;
2802 }
2803 case 8:
2804 {
2805 char *result = get_cell ();
2806 octal2str (result, val, width);
2807 if (use_c_format || val == 0)
2808 return result;
2809 else
2810 return result + 1;
2811 }
2812 default:
2813 internal_error (__FILE__, __LINE__,
2814 "failed internal consistency check");
2815 }
2816 }
2817
2818 /* Convert a CORE_ADDR into a string. */
2819 const char *
2820 core_addr_to_string (const CORE_ADDR addr)
2821 {
2822 char *str = get_cell ();
2823 strcpy (str, "0x");
2824 strcat (str, phex (addr, sizeof (addr)));
2825 return str;
2826 }
2827
2828 const char *
2829 core_addr_to_string_nz (const CORE_ADDR addr)
2830 {
2831 char *str = get_cell ();
2832 strcpy (str, "0x");
2833 strcat (str, phex_nz (addr, sizeof (addr)));
2834 return str;
2835 }
2836
2837 /* Convert a string back into a CORE_ADDR. */
2838 CORE_ADDR
2839 string_to_core_addr (const char *my_string)
2840 {
2841 CORE_ADDR addr = 0;
2842 if (my_string[0] == '0' && tolower (my_string[1]) == 'x')
2843 {
2844 /* Assume that it is in decimal. */
2845 int i;
2846 for (i = 2; my_string[i] != '\0'; i++)
2847 {
2848 if (isdigit (my_string[i]))
2849 addr = (my_string[i] - '0') + (addr * 16);
2850 else if (isxdigit (my_string[i]))
2851 addr = (tolower (my_string[i]) - 'a' + 0xa) + (addr * 16);
2852 else
2853 internal_error (__FILE__, __LINE__, "invalid hex");
2854 }
2855 }
2856 else
2857 {
2858 /* Assume that it is in decimal. */
2859 int i;
2860 for (i = 0; my_string[i] != '\0'; i++)
2861 {
2862 if (isdigit (my_string[i]))
2863 addr = (my_string[i] - '0') + (addr * 10);
2864 else
2865 internal_error (__FILE__, __LINE__, "invalid decimal");
2866 }
2867 }
2868 return addr;
2869 }
2870
2871 char *
2872 gdb_realpath (const char *filename)
2873 {
2874 /* Method 1: The system has a compile time upper bound on a filename
2875 path. Use that and realpath() to canonicalize the name. This is
2876 the most common case. Note that, if there isn't a compile time
2877 upper bound, you want to avoid realpath() at all costs. */
2878 #if defined(HAVE_REALPATH)
2879 {
2880 # if defined (PATH_MAX)
2881 char buf[PATH_MAX];
2882 # define USE_REALPATH
2883 # elif defined (MAXPATHLEN)
2884 char buf[MAXPATHLEN];
2885 # define USE_REALPATH
2886 # endif
2887 # if defined (USE_REALPATH)
2888 const char *rp = realpath (filename, buf);
2889 if (rp == NULL)
2890 rp = filename;
2891 return xstrdup (rp);
2892 # endif
2893 }
2894 #endif /* HAVE_REALPATH */
2895
2896 /* Method 2: The host system (i.e., GNU) has the function
2897 canonicalize_file_name() which malloc's a chunk of memory and
2898 returns that, use that. */
2899 #if defined(HAVE_CANONICALIZE_FILE_NAME)
2900 {
2901 char *rp = canonicalize_file_name (filename);
2902 if (rp == NULL)
2903 return xstrdup (filename);
2904 else
2905 return rp;
2906 }
2907 #endif
2908
2909 /* FIXME: cagney/2002-11-13:
2910
2911 Method 2a: Use realpath() with a NULL buffer. Some systems, due
2912 to the problems described in in method 3, have modified their
2913 realpath() implementation so that it will allocate a buffer when
2914 NULL is passed in. Before this can be used, though, some sort of
2915 configure time test would need to be added. Otherwize the code
2916 will likely core dump. */
2917
2918 /* Method 3: Now we're getting desperate! The system doesn't have a
2919 compile time buffer size and no alternative function. Query the
2920 OS, using pathconf(), for the buffer limit. Care is needed
2921 though, some systems do not limit PATH_MAX (return -1 for
2922 pathconf()) making it impossible to pass a correctly sized buffer
2923 to realpath() (it could always overflow). On those systems, we
2924 skip this. */
2925 #if defined (HAVE_REALPATH) && defined (HAVE_UNISTD_H) && defined(HAVE_ALLOCA)
2926 {
2927 /* Find out the max path size. */
2928 long path_max = pathconf ("/", _PC_PATH_MAX);
2929 if (path_max > 0)
2930 {
2931 /* PATH_MAX is bounded. */
2932 char *buf = alloca (path_max);
2933 char *rp = realpath (filename, buf);
2934 return xstrdup (rp ? rp : filename);
2935 }
2936 }
2937 #endif
2938
2939 /* This system is a lost cause, just dup the buffer. */
2940 return xstrdup (filename);
2941 }
2942
2943 /* Return a copy of FILENAME, with its directory prefix canonicalized
2944 by gdb_realpath. */
2945
2946 char *
2947 xfullpath (const char *filename)
2948 {
2949 const char *base_name = lbasename (filename);
2950 char *dir_name;
2951 char *real_path;
2952 char *result;
2953
2954 /* Extract the basename of filename, and return immediately
2955 a copy of filename if it does not contain any directory prefix. */
2956 if (base_name == filename)
2957 return xstrdup (filename);
2958
2959 dir_name = alloca ((size_t) (base_name - filename + 2));
2960 /* Allocate enough space to store the dir_name + plus one extra
2961 character sometimes needed under Windows (see below), and
2962 then the closing \000 character */
2963 strncpy (dir_name, filename, base_name - filename);
2964 dir_name[base_name - filename] = '\000';
2965
2966 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
2967 /* We need to be careful when filename is of the form 'd:foo', which
2968 is equivalent of d:./foo, which is totally different from d:/foo. */
2969 if (strlen (dir_name) == 2 && isalpha (dir_name[0]) && dir_name[1] == ':')
2970 {
2971 dir_name[2] = '.';
2972 dir_name[3] = '\000';
2973 }
2974 #endif
2975
2976 /* Canonicalize the directory prefix, and build the resulting
2977 filename. If the dirname realpath already contains an ending
2978 directory separator, avoid doubling it. */
2979 real_path = gdb_realpath (dir_name);
2980 if (IS_DIR_SEPARATOR (real_path[strlen (real_path) - 1]))
2981 result = concat (real_path, base_name, NULL);
2982 else
2983 result = concat (real_path, SLASH_STRING, base_name, NULL);
2984
2985 xfree (real_path);
2986 return result;
2987 }
2988
2989
2990 /* This is the 32-bit CRC function used by the GNU separate debug
2991 facility. An executable may contain a section named
2992 .gnu_debuglink, which holds the name of a separate executable file
2993 containing its debug info, and a checksum of that file's contents,
2994 computed using this function. */
2995 unsigned long
2996 gnu_debuglink_crc32 (unsigned long crc, unsigned char *buf, size_t len)
2997 {
2998 static const unsigned long crc32_table[256] = {
2999 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
3000 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
3001 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
3002 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
3003 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
3004 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
3005 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
3006 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
3007 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
3008 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
3009 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
3010 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
3011 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
3012 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
3013 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
3014 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
3015 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
3016 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
3017 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
3018 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
3019 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
3020 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
3021 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
3022 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
3023 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
3024 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
3025 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
3026 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
3027 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
3028 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
3029 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
3030 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
3031 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
3032 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
3033 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
3034 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
3035 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
3036 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
3037 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
3038 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
3039 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
3040 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
3041 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
3042 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
3043 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
3044 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
3045 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
3046 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
3047 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
3048 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
3049 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
3050 0x2d02ef8d
3051 };
3052 unsigned char *end;
3053
3054 crc = ~crc & 0xffffffff;
3055 for (end = buf + len; buf < end; ++buf)
3056 crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
3057 return ~crc & 0xffffffff;;
3058 }
3059
3060 ULONGEST
3061 align_up (ULONGEST v, int n)
3062 {
3063 /* Check that N is really a power of two. */
3064 gdb_assert (n && (n & (n-1)) == 0);
3065 return (v + n - 1) & -n;
3066 }
3067
3068 ULONGEST
3069 align_down (ULONGEST v, int n)
3070 {
3071 /* Check that N is really a power of two. */
3072 gdb_assert (n && (n & (n-1)) == 0);
3073 return (v & -n);
3074 }
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