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 MT |
20 | #include "defs.h" |
21 | ||
bd5635a1 RP |
22 | #include <sys/ioctl.h> |
23 | #include <sys/param.h> | |
24 | #include <pwd.h> | |
2bc2e684 FF |
25 | #include <varargs.h> |
26 | #include <ctype.h> | |
27 | #include <string.h> | |
28 | ||
bd5635a1 RP |
29 | #include "signals.h" |
30 | #include "gdbcmd.h" | |
31 | #include "terminal.h" | |
bd5635a1 RP |
32 | #include "bfd.h" |
33 | #include "target.h" | |
34 | ||
7919c3ed JG |
35 | /* Prototypes for local functions */ |
36 | ||
37 | #if !defined (NO_MALLOC_CHECK) | |
3624c875 | 38 | |
7919c3ed JG |
39 | static void |
40 | malloc_botch PARAMS ((void)); | |
3624c875 | 41 | |
7919c3ed JG |
42 | #endif /* NO_MALLOC_CHECK */ |
43 | ||
44 | static void | |
45 | fatal_dump_core (); /* Can't prototype with <varargs.h> usage... */ | |
46 | ||
47 | static void | |
48 | prompt_for_continue PARAMS ((void)); | |
49 | ||
50 | static void | |
51 | set_width_command PARAMS ((char *, int, struct cmd_list_element *)); | |
52 | ||
53 | static void | |
54 | vfprintf_filtered PARAMS ((FILE *, char *, va_list)); | |
bd5635a1 RP |
55 | |
56 | /* If this definition isn't overridden by the header files, assume | |
57 | that isatty and fileno exist on this system. */ | |
58 | #ifndef ISATTY | |
59 | #define ISATTY(FP) (isatty (fileno (FP))) | |
60 | #endif | |
61 | ||
bd5635a1 RP |
62 | /* Chain of cleanup actions established with make_cleanup, |
63 | to be executed if an error happens. */ | |
64 | ||
65 | static struct cleanup *cleanup_chain; | |
66 | ||
67 | /* Nonzero means a quit has been requested. */ | |
68 | ||
69 | int quit_flag; | |
70 | ||
71 | /* Nonzero means quit immediately if Control-C is typed now, | |
72 | rather than waiting until QUIT is executed. */ | |
73 | ||
74 | int immediate_quit; | |
75 | ||
76 | /* Nonzero means that encoded C++ names should be printed out in their | |
77 | C++ form rather than raw. */ | |
78 | ||
79 | int demangle = 1; | |
80 | ||
81 | /* Nonzero means that encoded C++ names should be printed out in their | |
82 | C++ form even in assembler language displays. If this is set, but | |
83 | DEMANGLE is zero, names are printed raw, i.e. DEMANGLE controls. */ | |
84 | ||
85 | int asm_demangle = 0; | |
86 | ||
87 | /* Nonzero means that strings with character values >0x7F should be printed | |
88 | as octal escapes. Zero means just print the value (e.g. it's an | |
89 | international character, and the terminal or window can cope.) */ | |
90 | ||
91 | int sevenbit_strings = 0; | |
81066208 JG |
92 | |
93 | /* String to be printed before error messages, if any. */ | |
94 | ||
95 | char *error_pre_print; | |
3624c875 | 96 | char *warning_pre_print = "\nwarning: "; |
bd5635a1 RP |
97 | \f |
98 | /* Add a new cleanup to the cleanup_chain, | |
99 | and return the previous chain pointer | |
100 | to be passed later to do_cleanups or discard_cleanups. | |
101 | Args are FUNCTION to clean up with, and ARG to pass to it. */ | |
102 | ||
103 | struct cleanup * | |
104 | make_cleanup (function, arg) | |
7919c3ed JG |
105 | void (*function) PARAMS ((PTR)); |
106 | PTR arg; | |
bd5635a1 RP |
107 | { |
108 | register struct cleanup *new | |
109 | = (struct cleanup *) xmalloc (sizeof (struct cleanup)); | |
110 | register struct cleanup *old_chain = cleanup_chain; | |
111 | ||
112 | new->next = cleanup_chain; | |
113 | new->function = function; | |
114 | new->arg = arg; | |
115 | cleanup_chain = new; | |
116 | ||
117 | return old_chain; | |
118 | } | |
119 | ||
120 | /* Discard cleanups and do the actions they describe | |
121 | until we get back to the point OLD_CHAIN in the cleanup_chain. */ | |
122 | ||
123 | void | |
124 | do_cleanups (old_chain) | |
125 | register struct cleanup *old_chain; | |
126 | { | |
127 | register struct cleanup *ptr; | |
128 | while ((ptr = cleanup_chain) != old_chain) | |
129 | { | |
5e5215eb | 130 | cleanup_chain = ptr->next; /* Do this first incase recursion */ |
bd5635a1 | 131 | (*ptr->function) (ptr->arg); |
bd5635a1 RP |
132 | free (ptr); |
133 | } | |
134 | } | |
135 | ||
136 | /* Discard cleanups, not doing the actions they describe, | |
137 | until we get back to the point OLD_CHAIN in the cleanup_chain. */ | |
138 | ||
139 | void | |
140 | discard_cleanups (old_chain) | |
141 | register struct cleanup *old_chain; | |
142 | { | |
143 | register struct cleanup *ptr; | |
144 | while ((ptr = cleanup_chain) != old_chain) | |
145 | { | |
146 | cleanup_chain = ptr->next; | |
be772100 | 147 | free ((PTR)ptr); |
bd5635a1 RP |
148 | } |
149 | } | |
150 | ||
151 | /* Set the cleanup_chain to 0, and return the old cleanup chain. */ | |
152 | struct cleanup * | |
153 | save_cleanups () | |
154 | { | |
155 | struct cleanup *old_chain = cleanup_chain; | |
156 | ||
157 | cleanup_chain = 0; | |
158 | return old_chain; | |
159 | } | |
160 | ||
161 | /* Restore the cleanup chain from a previously saved chain. */ | |
162 | void | |
163 | restore_cleanups (chain) | |
164 | struct cleanup *chain; | |
165 | { | |
166 | cleanup_chain = chain; | |
167 | } | |
168 | ||
169 | /* This function is useful for cleanups. | |
170 | Do | |
171 | ||
172 | foo = xmalloc (...); | |
173 | old_chain = make_cleanup (free_current_contents, &foo); | |
174 | ||
175 | to arrange to free the object thus allocated. */ | |
176 | ||
177 | void | |
178 | free_current_contents (location) | |
179 | char **location; | |
180 | { | |
181 | free (*location); | |
182 | } | |
088c3a0b JG |
183 | |
184 | /* Provide a known function that does nothing, to use as a base for | |
185 | for a possibly long chain of cleanups. This is useful where we | |
186 | use the cleanup chain for handling normal cleanups as well as dealing | |
187 | with cleanups that need to be done as a result of a call to error(). | |
188 | In such cases, we may not be certain where the first cleanup is, unless | |
189 | we have a do-nothing one to always use as the base. */ | |
190 | ||
191 | /* ARGSUSED */ | |
192 | void | |
193 | null_cleanup (arg) | |
194 | char **arg; | |
195 | { | |
196 | } | |
197 | ||
bd5635a1 | 198 | \f |
2bc2e684 FF |
199 | /* Provide a hook for modules wishing to print their own warning messages |
200 | to set up the terminal state in a compatible way, without them having | |
201 | to import all the target_<...> macros. */ | |
202 | ||
203 | void | |
204 | warning_setup () | |
205 | { | |
206 | target_terminal_ours (); | |
207 | wrap_here(""); /* Force out any buffered output */ | |
208 | fflush (stdout); | |
209 | } | |
210 | ||
211 | /* Print a warning message. | |
212 | The first argument STRING is the warning message, used as a fprintf string, | |
213 | and the remaining args are passed as arguments to it. | |
214 | The primary difference between warnings and errors is that a warning | |
215 | does not force the return to command level. */ | |
216 | ||
217 | /* VARARGS */ | |
218 | void | |
219 | warning (va_alist) | |
220 | va_dcl | |
221 | { | |
222 | va_list args; | |
223 | char *string; | |
224 | ||
225 | va_start (args); | |
226 | target_terminal_ours (); | |
227 | wrap_here(""); /* Force out any buffered output */ | |
228 | fflush (stdout); | |
229 | if (warning_pre_print) | |
230 | fprintf (stderr, warning_pre_print); | |
231 | string = va_arg (args, char *); | |
232 | vfprintf (stderr, string, args); | |
233 | fprintf (stderr, "\n"); | |
234 | va_end (args); | |
235 | } | |
236 | ||
bd5635a1 RP |
237 | /* Print an error message and return to command level. |
238 | The first argument STRING is the error message, used as a fprintf string, | |
239 | and the remaining args are passed as arguments to it. */ | |
240 | ||
241 | /* VARARGS */ | |
7919c3ed | 242 | NORETURN void |
bd5635a1 RP |
243 | error (va_alist) |
244 | va_dcl | |
245 | { | |
246 | va_list args; | |
247 | char *string; | |
248 | ||
249 | va_start (args); | |
250 | target_terminal_ours (); | |
2bc2e684 | 251 | wrap_here(""); /* Force out any buffered output */ |
bd5635a1 | 252 | fflush (stdout); |
81066208 JG |
253 | if (error_pre_print) |
254 | fprintf (stderr, error_pre_print); | |
bd5635a1 RP |
255 | string = va_arg (args, char *); |
256 | vfprintf (stderr, string, args); | |
257 | fprintf (stderr, "\n"); | |
258 | va_end (args); | |
259 | return_to_top_level (); | |
260 | } | |
261 | ||
262 | /* Print an error message and exit reporting failure. | |
263 | This is for a error that we cannot continue from. | |
7919c3ed JG |
264 | The arguments are printed a la printf. |
265 | ||
266 | This function cannot be declared volatile (NORETURN) in an | |
267 | ANSI environment because exit() is not declared volatile. */ | |
bd5635a1 RP |
268 | |
269 | /* VARARGS */ | |
7919c3ed | 270 | NORETURN void |
bd5635a1 RP |
271 | fatal (va_alist) |
272 | va_dcl | |
273 | { | |
274 | va_list args; | |
275 | char *string; | |
276 | ||
277 | va_start (args); | |
278 | string = va_arg (args, char *); | |
3624c875 | 279 | fprintf (stderr, "\ngdb: "); |
bd5635a1 RP |
280 | vfprintf (stderr, string, args); |
281 | fprintf (stderr, "\n"); | |
282 | va_end (args); | |
283 | exit (1); | |
284 | } | |
285 | ||
286 | /* Print an error message and exit, dumping core. | |
287 | The arguments are printed a la printf (). */ | |
7919c3ed | 288 | |
bd5635a1 | 289 | /* VARARGS */ |
7919c3ed | 290 | static void |
bd5635a1 RP |
291 | fatal_dump_core (va_alist) |
292 | va_dcl | |
293 | { | |
294 | va_list args; | |
295 | char *string; | |
296 | ||
297 | va_start (args); | |
298 | string = va_arg (args, char *); | |
299 | /* "internal error" is always correct, since GDB should never dump | |
300 | core, no matter what the input. */ | |
3624c875 | 301 | fprintf (stderr, "\ngdb internal error: "); |
bd5635a1 RP |
302 | vfprintf (stderr, string, args); |
303 | fprintf (stderr, "\n"); | |
304 | va_end (args); | |
305 | ||
306 | signal (SIGQUIT, SIG_DFL); | |
307 | kill (getpid (), SIGQUIT); | |
308 | /* We should never get here, but just in case... */ | |
309 | exit (1); | |
310 | } | |
7919c3ed | 311 | |
bd5635a1 RP |
312 | /* Print the system error message for errno, and also mention STRING |
313 | as the file name for which the error was encountered. | |
314 | Then return to command level. */ | |
315 | ||
316 | void | |
317 | perror_with_name (string) | |
318 | char *string; | |
319 | { | |
320 | extern int sys_nerr; | |
321 | extern char *sys_errlist[]; | |
322 | char *err; | |
323 | char *combined; | |
324 | ||
325 | if (errno < sys_nerr) | |
326 | err = sys_errlist[errno]; | |
327 | else | |
328 | err = "unknown error"; | |
329 | ||
330 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); | |
331 | strcpy (combined, string); | |
332 | strcat (combined, ": "); | |
333 | strcat (combined, err); | |
334 | ||
335 | /* I understand setting these is a matter of taste. Still, some people | |
336 | may clear errno but not know about bfd_error. Doing this here is not | |
337 | unreasonable. */ | |
338 | bfd_error = no_error; | |
339 | errno = 0; | |
340 | ||
341 | error ("%s.", combined); | |
342 | } | |
343 | ||
344 | /* Print the system error message for ERRCODE, and also mention STRING | |
345 | as the file name for which the error was encountered. */ | |
346 | ||
347 | void | |
348 | print_sys_errmsg (string, errcode) | |
349 | char *string; | |
350 | int errcode; | |
351 | { | |
352 | extern int sys_nerr; | |
353 | extern char *sys_errlist[]; | |
354 | char *err; | |
355 | char *combined; | |
356 | ||
357 | if (errcode < sys_nerr) | |
358 | err = sys_errlist[errcode]; | |
359 | else | |
360 | err = "unknown error"; | |
361 | ||
362 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); | |
363 | strcpy (combined, string); | |
364 | strcat (combined, ": "); | |
365 | strcat (combined, err); | |
366 | ||
367 | printf ("%s.\n", combined); | |
368 | } | |
369 | ||
370 | /* Control C eventually causes this to be called, at a convenient time. */ | |
371 | ||
372 | void | |
373 | quit () | |
374 | { | |
375 | target_terminal_ours (); | |
d11c44f1 | 376 | wrap_here ((char *)0); /* Force out any pending output */ |
bd5635a1 RP |
377 | #ifdef HAVE_TERMIO |
378 | ioctl (fileno (stdout), TCFLSH, 1); | |
379 | #else /* not HAVE_TERMIO */ | |
380 | ioctl (fileno (stdout), TIOCFLUSH, 0); | |
381 | #endif /* not HAVE_TERMIO */ | |
382 | #ifdef TIOCGPGRP | |
383 | error ("Quit"); | |
384 | #else | |
385 | error ("Quit (expect signal %d when inferior is resumed)", SIGINT); | |
386 | #endif /* TIOCGPGRP */ | |
387 | } | |
388 | ||
389 | /* Control C comes here */ | |
390 | ||
391 | void | |
088c3a0b JG |
392 | request_quit (signo) |
393 | int signo; | |
bd5635a1 RP |
394 | { |
395 | quit_flag = 1; | |
396 | ||
397 | #ifdef USG | |
398 | /* Restore the signal handler. */ | |
088c3a0b | 399 | signal (signo, request_quit); |
bd5635a1 RP |
400 | #endif |
401 | ||
402 | if (immediate_quit) | |
403 | quit (); | |
404 | } | |
3624c875 FF |
405 | |
406 | \f | |
407 | /* Memory management stuff (malloc friends). */ | |
408 | ||
409 | #if defined (NO_MMALLOC) | |
410 | ||
411 | PTR | |
412 | mmalloc (md, size) | |
413 | PTR md; | |
414 | long size; | |
415 | { | |
416 | return (malloc (size)); | |
417 | } | |
418 | ||
419 | PTR | |
420 | mrealloc (md, ptr, size) | |
421 | PTR md; | |
422 | PTR ptr; | |
423 | long size; | |
424 | { | |
425 | return (realloc (ptr, size)); | |
426 | } | |
427 | ||
428 | void | |
429 | mfree (md, ptr) | |
430 | PTR md; | |
431 | PTR ptr; | |
432 | { | |
433 | free (ptr); | |
434 | } | |
435 | ||
436 | #endif /* NO_MMALLOC */ | |
437 | ||
438 | #if defined (NO_MMALLOC) || defined (NO_MMALLOC_CHECK) | |
439 | ||
440 | void | |
441 | init_malloc (md) | |
442 | PTR md; | |
443 | { | |
444 | } | |
445 | ||
446 | #else /* have mmalloc and want corruption checking */ | |
447 | ||
448 | static void | |
449 | malloc_botch () | |
450 | { | |
451 | fatal_dump_core ("Memory corruption"); | |
452 | } | |
453 | ||
454 | /* Attempt to install hooks in mmalloc/mrealloc/mfree for the heap specified | |
455 | by MD, to detect memory corruption. Note that MD may be NULL to specify | |
456 | the default heap that grows via sbrk. | |
457 | ||
458 | Note that for freshly created regions, we must call mmcheck prior to any | |
459 | mallocs in the region. Otherwise, any region which was allocated prior to | |
460 | installing the checking hooks, which is later reallocated or freed, will | |
461 | fail the checks! The mmcheck function only allows initial hooks to be | |
462 | installed before the first mmalloc. However, anytime after we have called | |
463 | mmcheck the first time to install the checking hooks, we can call it again | |
464 | to update the function pointer to the memory corruption handler. | |
465 | ||
466 | Returns zero on failure, non-zero on success. */ | |
467 | ||
468 | void | |
469 | init_malloc (md) | |
470 | PTR md; | |
471 | { | |
472 | if (!mmcheck (md, malloc_botch)) | |
473 | { | |
474 | warning ("internal error: failed to install memory consistency checks"); | |
475 | } | |
476 | ||
477 | (void) mmtrace (); | |
478 | } | |
479 | ||
480 | #endif /* Have mmalloc and want corruption checking */ | |
481 | ||
482 | /* Called when a memory allocation fails, with the number of bytes of | |
483 | memory requested in SIZE. */ | |
484 | ||
485 | NORETURN void | |
486 | nomem (size) | |
487 | long size; | |
488 | { | |
489 | if (size > 0) | |
490 | { | |
491 | fatal ("virtual memory exhausted: can't allocate %ld bytes.", size); | |
492 | } | |
493 | else | |
494 | { | |
495 | fatal ("virtual memory exhausted."); | |
496 | } | |
497 | } | |
498 | ||
499 | /* Like mmalloc but get error if no storage available, and protect against | |
500 | the caller wanting to allocate zero bytes. Whether to return NULL for | |
501 | a zero byte request, or translate the request into a request for one | |
502 | byte of zero'd storage, is a religious issue. */ | |
503 | ||
504 | PTR | |
505 | xmmalloc (md, size) | |
506 | PTR md; | |
507 | long size; | |
508 | { | |
509 | register PTR val; | |
510 | ||
511 | if (size == 0) | |
512 | { | |
513 | val = NULL; | |
514 | } | |
515 | else if ((val = mmalloc (md, size)) == NULL) | |
516 | { | |
517 | nomem (size); | |
518 | } | |
519 | return (val); | |
520 | } | |
521 | ||
522 | /* Like mrealloc but get error if no storage available. */ | |
523 | ||
524 | PTR | |
525 | xmrealloc (md, ptr, size) | |
526 | PTR md; | |
527 | PTR ptr; | |
528 | long size; | |
529 | { | |
530 | register PTR val; | |
531 | ||
532 | if (ptr != NULL) | |
533 | { | |
534 | val = mrealloc (md, ptr, size); | |
535 | } | |
536 | else | |
537 | { | |
538 | val = mmalloc (md, size); | |
539 | } | |
540 | if (val == NULL) | |
541 | { | |
542 | nomem (size); | |
543 | } | |
544 | return (val); | |
545 | } | |
546 | ||
547 | /* Like malloc but get error if no storage available, and protect against | |
548 | the caller wanting to allocate zero bytes. */ | |
549 | ||
550 | PTR | |
551 | xmalloc (size) | |
552 | long size; | |
553 | { | |
554 | return (xmmalloc ((void *) NULL, size)); | |
555 | } | |
556 | ||
557 | /* Like mrealloc but get error if no storage available. */ | |
558 | ||
559 | PTR | |
560 | xrealloc (ptr, size) | |
561 | PTR ptr; | |
562 | long size; | |
563 | { | |
564 | return (xmrealloc ((void *) NULL, ptr, size)); | |
565 | } | |
566 | ||
bd5635a1 RP |
567 | \f |
568 | /* My replacement for the read system call. | |
569 | Used like `read' but keeps going if `read' returns too soon. */ | |
570 | ||
571 | int | |
572 | myread (desc, addr, len) | |
573 | int desc; | |
574 | char *addr; | |
575 | int len; | |
576 | { | |
577 | register int val; | |
578 | int orglen = len; | |
579 | ||
580 | while (len > 0) | |
581 | { | |
582 | val = read (desc, addr, len); | |
583 | if (val < 0) | |
584 | return val; | |
585 | if (val == 0) | |
586 | return orglen - len; | |
587 | len -= val; | |
588 | addr += val; | |
589 | } | |
590 | return orglen; | |
591 | } | |
592 | \f | |
593 | /* Make a copy of the string at PTR with SIZE characters | |
594 | (and add a null character at the end in the copy). | |
595 | Uses malloc to get the space. Returns the address of the copy. */ | |
596 | ||
597 | char * | |
598 | savestring (ptr, size) | |
088c3a0b | 599 | const char *ptr; |
bd5635a1 RP |
600 | int size; |
601 | { | |
602 | register char *p = (char *) xmalloc (size + 1); | |
603 | bcopy (ptr, p, size); | |
604 | p[size] = 0; | |
605 | return p; | |
606 | } | |
607 | ||
3624c875 FF |
608 | char * |
609 | msavestring (md, ptr, size) | |
610 | void *md; | |
611 | const char *ptr; | |
612 | int size; | |
613 | { | |
614 | register char *p = (char *) xmmalloc (md, size + 1); | |
615 | bcopy (ptr, p, size); | |
616 | p[size] = 0; | |
617 | return p; | |
618 | } | |
619 | ||
8aa13b87 JK |
620 | /* The "const" is so it compiles under DGUX (which prototypes strsave |
621 | in <string.h>. FIXME: This should be named "xstrsave", shouldn't it? | |
622 | Doesn't real strsave return NULL if out of memory? */ | |
bd5635a1 RP |
623 | char * |
624 | strsave (ptr) | |
8aa13b87 | 625 | const char *ptr; |
bd5635a1 RP |
626 | { |
627 | return savestring (ptr, strlen (ptr)); | |
628 | } | |
629 | ||
3624c875 FF |
630 | char * |
631 | mstrsave (md, ptr) | |
632 | void *md; | |
633 | const char *ptr; | |
634 | { | |
635 | return (msavestring (md, ptr, strlen (ptr))); | |
636 | } | |
637 | ||
bd5635a1 RP |
638 | void |
639 | print_spaces (n, file) | |
640 | register int n; | |
641 | register FILE *file; | |
642 | { | |
643 | while (n-- > 0) | |
644 | fputc (' ', file); | |
645 | } | |
646 | ||
647 | /* Ask user a y-or-n question and return 1 iff answer is yes. | |
648 | Takes three args which are given to printf to print the question. | |
649 | The first, a control string, should end in "? ". | |
650 | It should not say how to answer, because we do that. */ | |
651 | ||
652 | /* VARARGS */ | |
653 | int | |
654 | query (va_alist) | |
655 | va_dcl | |
656 | { | |
657 | va_list args; | |
658 | char *ctlstr; | |
659 | register int answer; | |
660 | register int ans2; | |
661 | ||
662 | /* Automatically answer "yes" if input is not from a terminal. */ | |
663 | if (!input_from_terminal_p ()) | |
664 | return 1; | |
665 | ||
666 | while (1) | |
667 | { | |
668 | va_start (args); | |
669 | ctlstr = va_arg (args, char *); | |
670 | vfprintf (stdout, ctlstr, args); | |
671 | va_end (args); | |
672 | printf ("(y or n) "); | |
673 | fflush (stdout); | |
674 | answer = fgetc (stdin); | |
675 | clearerr (stdin); /* in case of C-d */ | |
676 | if (answer == EOF) /* C-d */ | |
677 | return 1; | |
678 | if (answer != '\n') /* Eat rest of input line, to EOF or newline */ | |
679 | do | |
680 | { | |
681 | ans2 = fgetc (stdin); | |
682 | clearerr (stdin); | |
683 | } | |
684 | while (ans2 != EOF && ans2 != '\n'); | |
685 | if (answer >= 'a') | |
686 | answer -= 040; | |
687 | if (answer == 'Y') | |
688 | return 1; | |
689 | if (answer == 'N') | |
690 | return 0; | |
691 | printf ("Please answer y or n.\n"); | |
692 | } | |
693 | } | |
7919c3ed | 694 | |
bd5635a1 RP |
695 | \f |
696 | /* Parse a C escape sequence. STRING_PTR points to a variable | |
697 | containing a pointer to the string to parse. That pointer | |
698 | should point to the character after the \. That pointer | |
699 | is updated past the characters we use. The value of the | |
700 | escape sequence is returned. | |
701 | ||
702 | A negative value means the sequence \ newline was seen, | |
703 | which is supposed to be equivalent to nothing at all. | |
704 | ||
705 | If \ is followed by a null character, we return a negative | |
706 | value and leave the string pointer pointing at the null character. | |
707 | ||
708 | If \ is followed by 000, we return 0 and leave the string pointer | |
709 | after the zeros. A value of 0 does not mean end of string. */ | |
710 | ||
711 | int | |
712 | parse_escape (string_ptr) | |
713 | char **string_ptr; | |
714 | { | |
715 | register int c = *(*string_ptr)++; | |
716 | switch (c) | |
717 | { | |
718 | case 'a': | |
2bc2e684 | 719 | return 007; /* Bell (alert) char */ |
bd5635a1 RP |
720 | case 'b': |
721 | return '\b'; | |
2bc2e684 | 722 | case 'e': /* Escape character */ |
bd5635a1 RP |
723 | return 033; |
724 | case 'f': | |
725 | return '\f'; | |
726 | case 'n': | |
727 | return '\n'; | |
728 | case 'r': | |
729 | return '\r'; | |
730 | case 't': | |
731 | return '\t'; | |
732 | case 'v': | |
733 | return '\v'; | |
734 | case '\n': | |
735 | return -2; | |
736 | case 0: | |
737 | (*string_ptr)--; | |
738 | return 0; | |
739 | case '^': | |
740 | c = *(*string_ptr)++; | |
741 | if (c == '\\') | |
742 | c = parse_escape (string_ptr); | |
743 | if (c == '?') | |
744 | return 0177; | |
745 | return (c & 0200) | (c & 037); | |
746 | ||
747 | case '0': | |
748 | case '1': | |
749 | case '2': | |
750 | case '3': | |
751 | case '4': | |
752 | case '5': | |
753 | case '6': | |
754 | case '7': | |
755 | { | |
756 | register int i = c - '0'; | |
757 | register int count = 0; | |
758 | while (++count < 3) | |
759 | { | |
760 | if ((c = *(*string_ptr)++) >= '0' && c <= '7') | |
761 | { | |
762 | i *= 8; | |
763 | i += c - '0'; | |
764 | } | |
765 | else | |
766 | { | |
767 | (*string_ptr)--; | |
768 | break; | |
769 | } | |
770 | } | |
771 | return i; | |
772 | } | |
773 | default: | |
774 | return c; | |
775 | } | |
776 | } | |
777 | \f | |
088c3a0b | 778 | /* Print the character C on STREAM as part of the contents |
bd5635a1 RP |
779 | of a literal string whose delimiter is QUOTER. */ |
780 | ||
781 | void | |
088c3a0b JG |
782 | printchar (c, stream, quoter) |
783 | register int c; | |
bd5635a1 RP |
784 | FILE *stream; |
785 | int quoter; | |
786 | { | |
bd5635a1 | 787 | |
2bc2e684 | 788 | if (c < 040 || (sevenbit_strings && c >= 0177)) { |
bd5635a1 RP |
789 | switch (c) |
790 | { | |
791 | case '\n': | |
792 | fputs_filtered ("\\n", stream); | |
793 | break; | |
794 | case '\b': | |
795 | fputs_filtered ("\\b", stream); | |
796 | break; | |
797 | case '\t': | |
798 | fputs_filtered ("\\t", stream); | |
799 | break; | |
800 | case '\f': | |
801 | fputs_filtered ("\\f", stream); | |
802 | break; | |
803 | case '\r': | |
804 | fputs_filtered ("\\r", stream); | |
805 | break; | |
806 | case '\033': | |
807 | fputs_filtered ("\\e", stream); | |
808 | break; | |
809 | case '\007': | |
810 | fputs_filtered ("\\a", stream); | |
811 | break; | |
812 | default: | |
813 | fprintf_filtered (stream, "\\%.3o", (unsigned int) c); | |
814 | break; | |
815 | } | |
2bc2e684 FF |
816 | } else { |
817 | if (c == '\\' || c == quoter) | |
818 | fputs_filtered ("\\", stream); | |
819 | fprintf_filtered (stream, "%c", c); | |
820 | } | |
bd5635a1 RP |
821 | } |
822 | \f | |
823 | /* Number of lines per page or UINT_MAX if paging is disabled. */ | |
824 | static unsigned int lines_per_page; | |
825 | /* Number of chars per line or UNIT_MAX is line folding is disabled. */ | |
826 | static unsigned int chars_per_line; | |
827 | /* Current count of lines printed on this page, chars on this line. */ | |
828 | static unsigned int lines_printed, chars_printed; | |
829 | ||
830 | /* Buffer and start column of buffered text, for doing smarter word- | |
831 | wrapping. When someone calls wrap_here(), we start buffering output | |
832 | that comes through fputs_filtered(). If we see a newline, we just | |
833 | spit it out and forget about the wrap_here(). If we see another | |
834 | wrap_here(), we spit it out and remember the newer one. If we see | |
835 | the end of the line, we spit out a newline, the indent, and then | |
836 | the buffered output. | |
837 | ||
838 | wrap_column is the column number on the screen where wrap_buffer begins. | |
839 | When wrap_column is zero, wrapping is not in effect. | |
840 | wrap_buffer is malloc'd with chars_per_line+2 bytes. | |
841 | When wrap_buffer[0] is null, the buffer is empty. | |
842 | wrap_pointer points into it at the next character to fill. | |
843 | wrap_indent is the string that should be used as indentation if the | |
844 | wrap occurs. */ | |
845 | ||
846 | static char *wrap_buffer, *wrap_pointer, *wrap_indent; | |
847 | static int wrap_column; | |
848 | ||
e1ce8aa5 | 849 | /* ARGSUSED */ |
bd5635a1 RP |
850 | static void |
851 | set_width_command (args, from_tty, c) | |
852 | char *args; | |
853 | int from_tty; | |
854 | struct cmd_list_element *c; | |
855 | { | |
856 | if (!wrap_buffer) | |
857 | { | |
858 | wrap_buffer = (char *) xmalloc (chars_per_line + 2); | |
859 | wrap_buffer[0] = '\0'; | |
860 | } | |
861 | else | |
862 | wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2); | |
863 | wrap_pointer = wrap_buffer; /* Start it at the beginning */ | |
864 | } | |
865 | ||
866 | static void | |
867 | prompt_for_continue () | |
868 | { | |
351b221d JG |
869 | char *ignore; |
870 | ||
bd5635a1 | 871 | immediate_quit++; |
351b221d JG |
872 | ignore = gdb_readline ("---Type <return> to continue---"); |
873 | if (ignore) | |
874 | free (ignore); | |
bd5635a1 RP |
875 | chars_printed = lines_printed = 0; |
876 | immediate_quit--; | |
351b221d | 877 | dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */ |
bd5635a1 RP |
878 | } |
879 | ||
880 | /* Reinitialize filter; ie. tell it to reset to original values. */ | |
881 | ||
882 | void | |
883 | reinitialize_more_filter () | |
884 | { | |
885 | lines_printed = 0; | |
886 | chars_printed = 0; | |
887 | } | |
888 | ||
889 | /* Indicate that if the next sequence of characters overflows the line, | |
890 | a newline should be inserted here rather than when it hits the end. | |
891 | If INDENT is nonzero, it is a string to be printed to indent the | |
892 | wrapped part on the next line. INDENT must remain accessible until | |
893 | the next call to wrap_here() or until a newline is printed through | |
894 | fputs_filtered(). | |
895 | ||
896 | If the line is already overfull, we immediately print a newline and | |
897 | the indentation, and disable further wrapping. | |
898 | ||
2bc2e684 FF |
899 | If we don't know the width of lines, but we know the page height, |
900 | we must not wrap words, but should still keep track of newlines | |
901 | that were explicitly printed. | |
902 | ||
bd5635a1 RP |
903 | INDENT should not contain tabs, as that |
904 | will mess up the char count on the next line. FIXME. */ | |
905 | ||
906 | void | |
907 | wrap_here(indent) | |
908 | char *indent; | |
909 | { | |
910 | if (wrap_buffer[0]) | |
911 | { | |
912 | *wrap_pointer = '\0'; | |
913 | fputs (wrap_buffer, stdout); | |
914 | } | |
915 | wrap_pointer = wrap_buffer; | |
916 | wrap_buffer[0] = '\0'; | |
2bc2e684 FF |
917 | if (chars_per_line == UINT_MAX) /* No line overflow checking */ |
918 | { | |
919 | wrap_column = 0; | |
920 | } | |
921 | else if (chars_printed >= chars_per_line) | |
bd5635a1 RP |
922 | { |
923 | puts_filtered ("\n"); | |
924 | puts_filtered (indent); | |
925 | wrap_column = 0; | |
926 | } | |
927 | else | |
928 | { | |
929 | wrap_column = chars_printed; | |
930 | wrap_indent = indent; | |
931 | } | |
932 | } | |
933 | ||
934 | /* Like fputs but pause after every screenful, and can wrap at points | |
935 | other than the final character of a line. | |
936 | Unlike fputs, fputs_filtered does not return a value. | |
937 | It is OK for LINEBUFFER to be NULL, in which case just don't print | |
938 | anything. | |
939 | ||
940 | Note that a longjmp to top level may occur in this routine | |
941 | (since prompt_for_continue may do so) so this routine should not be | |
942 | called when cleanups are not in place. */ | |
943 | ||
944 | void | |
945 | fputs_filtered (linebuffer, stream) | |
088c3a0b | 946 | const char *linebuffer; |
bd5635a1 RP |
947 | FILE *stream; |
948 | { | |
7919c3ed | 949 | const char *lineptr; |
bd5635a1 RP |
950 | |
951 | if (linebuffer == 0) | |
952 | return; | |
953 | ||
954 | /* Don't do any filtering if it is disabled. */ | |
955 | if (stream != stdout | |
956 | || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX)) | |
957 | { | |
958 | fputs (linebuffer, stream); | |
959 | return; | |
960 | } | |
961 | ||
962 | /* Go through and output each character. Show line extension | |
963 | when this is necessary; prompt user for new page when this is | |
964 | necessary. */ | |
965 | ||
966 | lineptr = linebuffer; | |
967 | while (*lineptr) | |
968 | { | |
969 | /* Possible new page. */ | |
970 | if (lines_printed >= lines_per_page - 1) | |
971 | prompt_for_continue (); | |
972 | ||
973 | while (*lineptr && *lineptr != '\n') | |
974 | { | |
975 | /* Print a single line. */ | |
976 | if (*lineptr == '\t') | |
977 | { | |
978 | if (wrap_column) | |
979 | *wrap_pointer++ = '\t'; | |
980 | else | |
981 | putc ('\t', stream); | |
982 | /* Shifting right by 3 produces the number of tab stops | |
983 | we have already passed, and then adding one and | |
984 | shifting left 3 advances to the next tab stop. */ | |
985 | chars_printed = ((chars_printed >> 3) + 1) << 3; | |
986 | lineptr++; | |
987 | } | |
988 | else | |
989 | { | |
990 | if (wrap_column) | |
991 | *wrap_pointer++ = *lineptr; | |
992 | else | |
993 | putc (*lineptr, stream); | |
994 | chars_printed++; | |
995 | lineptr++; | |
996 | } | |
997 | ||
998 | if (chars_printed >= chars_per_line) | |
999 | { | |
1000 | unsigned int save_chars = chars_printed; | |
1001 | ||
1002 | chars_printed = 0; | |
1003 | lines_printed++; | |
1004 | /* If we aren't actually wrapping, don't output newline -- | |
1005 | if chars_per_line is right, we probably just overflowed | |
1006 | anyway; if it's wrong, let us keep going. */ | |
1007 | if (wrap_column) | |
1008 | putc ('\n', stream); | |
1009 | ||
1010 | /* Possible new page. */ | |
1011 | if (lines_printed >= lines_per_page - 1) | |
1012 | prompt_for_continue (); | |
1013 | ||
1014 | /* Now output indentation and wrapped string */ | |
1015 | if (wrap_column) | |
1016 | { | |
1017 | if (wrap_indent) | |
1018 | fputs (wrap_indent, stream); | |
1019 | *wrap_pointer = '\0'; /* Null-terminate saved stuff */ | |
1020 | fputs (wrap_buffer, stream); /* and eject it */ | |
1021 | /* FIXME, this strlen is what prevents wrap_indent from | |
1022 | containing tabs. However, if we recurse to print it | |
1023 | and count its chars, we risk trouble if wrap_indent is | |
1024 | longer than (the user settable) chars_per_line. | |
1025 | Note also that this can set chars_printed > chars_per_line | |
1026 | if we are printing a long string. */ | |
1027 | chars_printed = strlen (wrap_indent) | |
1028 | + (save_chars - wrap_column); | |
1029 | wrap_pointer = wrap_buffer; /* Reset buffer */ | |
1030 | wrap_buffer[0] = '\0'; | |
1031 | wrap_column = 0; /* And disable fancy wrap */ | |
1032 | } | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | if (*lineptr == '\n') | |
1037 | { | |
1038 | chars_printed = 0; | |
d11c44f1 | 1039 | wrap_here ((char *)0); /* Spit out chars, cancel further wraps */ |
bd5635a1 RP |
1040 | lines_printed++; |
1041 | putc ('\n', stream); | |
1042 | lineptr++; | |
1043 | } | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | ||
1048 | /* fputs_demangled is a variant of fputs_filtered that | |
1049 | demangles g++ names.*/ | |
1050 | ||
1051 | void | |
1052 | fputs_demangled (linebuffer, stream, arg_mode) | |
1053 | char *linebuffer; | |
1054 | FILE *stream; | |
1055 | int arg_mode; | |
1056 | { | |
bd5635a1 RP |
1057 | #define SYMBOL_MAX 1024 |
1058 | ||
f88e7af8 JK |
1059 | #define SYMBOL_CHAR(c) (isascii(c) \ |
1060 | && (isalnum(c) || (c) == '_' || (c) == CPLUS_MARKER)) | |
bd5635a1 RP |
1061 | |
1062 | char buf[SYMBOL_MAX+1]; | |
1063 | # define SLOP 5 /* How much room to leave in buf */ | |
1064 | char *p; | |
1065 | ||
1066 | if (linebuffer == NULL) | |
1067 | return; | |
1068 | ||
1069 | /* If user wants to see raw output, no problem. */ | |
1070 | if (!demangle) { | |
1071 | fputs_filtered (linebuffer, stream); | |
bdbd5f50 | 1072 | return; |
bd5635a1 RP |
1073 | } |
1074 | ||
1075 | p = linebuffer; | |
1076 | ||
1077 | while ( *p != (char) 0 ) { | |
1078 | int i = 0; | |
1079 | ||
1080 | /* collect non-interesting characters into buf */ | |
1081 | while ( *p != (char) 0 && !SYMBOL_CHAR(*p) && i < (int)sizeof(buf)-SLOP ) { | |
1082 | buf[i++] = *p; | |
1083 | p++; | |
1084 | } | |
1085 | if (i > 0) { | |
1086 | /* output the non-interesting characters without demangling */ | |
1087 | buf[i] = (char) 0; | |
1088 | fputs_filtered(buf, stream); | |
1089 | i = 0; /* reset buf */ | |
1090 | } | |
1091 | ||
1092 | /* and now the interesting characters */ | |
1093 | while (i < SYMBOL_MAX | |
1094 | && *p != (char) 0 | |
1095 | && SYMBOL_CHAR(*p) | |
1096 | && i < (int)sizeof(buf) - SLOP) { | |
1097 | buf[i++] = *p; | |
1098 | p++; | |
1099 | } | |
1100 | buf[i] = (char) 0; | |
1101 | if (i > 0) { | |
1102 | char * result; | |
1103 | ||
1104 | if ( (result = cplus_demangle(buf, arg_mode)) != NULL ) { | |
1105 | fputs_filtered(result, stream); | |
1106 | free(result); | |
1107 | } | |
1108 | else { | |
1109 | fputs_filtered(buf, stream); | |
1110 | } | |
1111 | } | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | /* Print a variable number of ARGS using format FORMAT. If this | |
1116 | information is going to put the amount written (since the last call | |
1117 | to INITIALIZE_MORE_FILTER or the last page break) over the page size, | |
1118 | print out a pause message and do a gdb_readline to get the users | |
1119 | permision to continue. | |
1120 | ||
1121 | Unlike fprintf, this function does not return a value. | |
1122 | ||
1123 | We implement three variants, vfprintf (takes a vararg list and stream), | |
1124 | fprintf (takes a stream to write on), and printf (the usual). | |
1125 | ||
1126 | Note that this routine has a restriction that the length of the | |
1127 | final output line must be less than 255 characters *or* it must be | |
1128 | less than twice the size of the format string. This is a very | |
1129 | arbitrary restriction, but it is an internal restriction, so I'll | |
1130 | put it in. This means that the %s format specifier is almost | |
1131 | useless; unless the caller can GUARANTEE that the string is short | |
1132 | enough, fputs_filtered should be used instead. | |
1133 | ||
1134 | Note also that a longjmp to top level may occur in this routine | |
1135 | (since prompt_for_continue may do so) so this routine should not be | |
1136 | called when cleanups are not in place. */ | |
1137 | ||
7919c3ed | 1138 | static void |
bd5635a1 | 1139 | vfprintf_filtered (stream, format, args) |
bd5635a1 RP |
1140 | FILE *stream; |
1141 | char *format; | |
7919c3ed | 1142 | va_list args; |
bd5635a1 RP |
1143 | { |
1144 | static char *linebuffer = (char *) 0; | |
1145 | static int line_size; | |
1146 | int format_length; | |
1147 | ||
1148 | format_length = strlen (format); | |
1149 | ||
1150 | /* Allocated linebuffer for the first time. */ | |
1151 | if (!linebuffer) | |
1152 | { | |
1153 | linebuffer = (char *) xmalloc (255); | |
1154 | line_size = 255; | |
1155 | } | |
1156 | ||
1157 | /* Reallocate buffer to a larger size if this is necessary. */ | |
1158 | if (format_length * 2 > line_size) | |
1159 | { | |
1160 | line_size = format_length * 2; | |
1161 | ||
1162 | /* You don't have to copy. */ | |
1163 | free (linebuffer); | |
1164 | linebuffer = (char *) xmalloc (line_size); | |
1165 | } | |
1166 | ||
1167 | ||
1168 | /* This won't blow up if the restrictions described above are | |
1169 | followed. */ | |
bd5635a1 | 1170 | (void) vsprintf (linebuffer, format, args); |
bd5635a1 RP |
1171 | |
1172 | fputs_filtered (linebuffer, stream); | |
1173 | } | |
1174 | ||
bd5635a1 RP |
1175 | /* VARARGS */ |
1176 | void | |
1177 | fprintf_filtered (va_alist) | |
1178 | va_dcl | |
1179 | { | |
bd5635a1 RP |
1180 | FILE *stream; |
1181 | char *format; | |
7919c3ed | 1182 | va_list args; |
bd5635a1 RP |
1183 | |
1184 | va_start (args); | |
1185 | stream = va_arg (args, FILE *); | |
1186 | format = va_arg (args, char *); | |
1187 | ||
1188 | /* This won't blow up if the restrictions described above are | |
1189 | followed. */ | |
7919c3ed | 1190 | vfprintf_filtered (stream, format, args); |
bd5635a1 RP |
1191 | va_end (args); |
1192 | } | |
1193 | ||
1194 | /* VARARGS */ | |
1195 | void | |
1196 | printf_filtered (va_alist) | |
1197 | va_dcl | |
1198 | { | |
1199 | va_list args; | |
1200 | char *format; | |
1201 | ||
1202 | va_start (args); | |
1203 | format = va_arg (args, char *); | |
1204 | ||
7919c3ed | 1205 | vfprintf_filtered (stdout, format, args); |
bd5635a1 RP |
1206 | va_end (args); |
1207 | } | |
bd5635a1 RP |
1208 | |
1209 | /* Easy */ | |
1210 | ||
1211 | void | |
1212 | puts_filtered (string) | |
1213 | char *string; | |
1214 | { | |
1215 | fputs_filtered (string, stdout); | |
1216 | } | |
1217 | ||
1218 | /* Return a pointer to N spaces and a null. The pointer is good | |
1219 | until the next call to here. */ | |
1220 | char * | |
1221 | n_spaces (n) | |
1222 | int n; | |
1223 | { | |
1224 | register char *t; | |
1225 | static char *spaces; | |
1226 | static int max_spaces; | |
1227 | ||
1228 | if (n > max_spaces) | |
1229 | { | |
1230 | if (spaces) | |
1231 | free (spaces); | |
3624c875 | 1232 | spaces = (char *) xmalloc (n+1); |
bd5635a1 RP |
1233 | for (t = spaces+n; t != spaces;) |
1234 | *--t = ' '; | |
1235 | spaces[n] = '\0'; | |
1236 | max_spaces = n; | |
1237 | } | |
1238 | ||
1239 | return spaces + max_spaces - n; | |
1240 | } | |
1241 | ||
1242 | /* Print N spaces. */ | |
1243 | void | |
1244 | print_spaces_filtered (n, stream) | |
1245 | int n; | |
1246 | FILE *stream; | |
1247 | { | |
1248 | fputs_filtered (n_spaces (n), stream); | |
1249 | } | |
1250 | \f | |
1251 | /* C++ demangler stuff. */ | |
bd5635a1 RP |
1252 | |
1253 | /* Print NAME on STREAM, demangling if necessary. */ | |
1254 | void | |
1255 | fprint_symbol (stream, name) | |
1256 | FILE *stream; | |
1257 | char *name; | |
1258 | { | |
1259 | char *demangled; | |
1260 | if ((!demangle) || NULL == (demangled = cplus_demangle (name, 1))) | |
1261 | fputs_filtered (name, stream); | |
1262 | else | |
1263 | { | |
1264 | fputs_filtered (demangled, stream); | |
1265 | free (demangled); | |
1266 | } | |
1267 | } | |
1268 | \f | |
bd5635a1 RP |
1269 | void |
1270 | _initialize_utils () | |
1271 | { | |
1272 | struct cmd_list_element *c; | |
1273 | ||
1274 | c = add_set_cmd ("width", class_support, var_uinteger, | |
1275 | (char *)&chars_per_line, | |
1276 | "Set number of characters gdb thinks are in a line.", | |
1277 | &setlist); | |
1278 | add_show_from_set (c, &showlist); | |
d747e0af | 1279 | c->function.sfunc = set_width_command; |
bd5635a1 RP |
1280 | |
1281 | add_show_from_set | |
1282 | (add_set_cmd ("height", class_support, | |
1283 | var_uinteger, (char *)&lines_per_page, | |
1284 | "Set number of lines gdb thinks are in a page.", &setlist), | |
1285 | &showlist); | |
1286 | ||
1287 | /* These defaults will be used if we are unable to get the correct | |
1288 | values from termcap. */ | |
1289 | lines_per_page = 24; | |
1290 | chars_per_line = 80; | |
1291 | /* Initialize the screen height and width from termcap. */ | |
1292 | { | |
1293 | char *termtype = getenv ("TERM"); | |
1294 | ||
1295 | /* Positive means success, nonpositive means failure. */ | |
1296 | int status; | |
1297 | ||
1298 | /* 2048 is large enough for all known terminals, according to the | |
1299 | GNU termcap manual. */ | |
1300 | char term_buffer[2048]; | |
1301 | ||
1302 | if (termtype) | |
1303 | { | |
1304 | status = tgetent (term_buffer, termtype); | |
1305 | if (status > 0) | |
1306 | { | |
1307 | int val; | |
1308 | ||
1309 | val = tgetnum ("li"); | |
1310 | if (val >= 0) | |
1311 | lines_per_page = val; | |
1312 | else | |
1313 | /* The number of lines per page is not mentioned | |
1314 | in the terminal description. This probably means | |
1315 | that paging is not useful (e.g. emacs shell window), | |
1316 | so disable paging. */ | |
1317 | lines_per_page = UINT_MAX; | |
1318 | ||
1319 | val = tgetnum ("co"); | |
1320 | if (val >= 0) | |
1321 | chars_per_line = val; | |
1322 | } | |
1323 | } | |
1324 | } | |
1325 | ||
1eeba686 PB |
1326 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
1327 | ||
1328 | /* If tere is a better way to determine window size, use it. */ | |
1329 | SIGWINCH_HANDLER (); | |
1330 | #endif | |
1331 | ||
2bc2e684 FF |
1332 | /* If the output is not a terminal, don't paginate it. */ |
1333 | if (!ISATTY (stdout)) | |
1334 | lines_per_page = UINT_MAX; | |
1335 | ||
bd5635a1 RP |
1336 | set_width_command ((char *)NULL, 0, c); |
1337 | ||
1338 | add_show_from_set | |
1339 | (add_set_cmd ("demangle", class_support, var_boolean, | |
1340 | (char *)&demangle, | |
1341 | "Set demangling of encoded C++ names when displaying symbols.", | |
f266e564 JK |
1342 | &setprintlist), |
1343 | &showprintlist); | |
bd5635a1 RP |
1344 | |
1345 | add_show_from_set | |
1346 | (add_set_cmd ("sevenbit-strings", class_support, var_boolean, | |
1347 | (char *)&sevenbit_strings, | |
1348 | "Set printing of 8-bit characters in strings as \\nnn.", | |
f266e564 JK |
1349 | &setprintlist), |
1350 | &showprintlist); | |
bd5635a1 RP |
1351 | |
1352 | add_show_from_set | |
1353 | (add_set_cmd ("asm-demangle", class_support, var_boolean, | |
1354 | (char *)&asm_demangle, | |
1355 | "Set demangling of C++ names in disassembly listings.", | |
f266e564 JK |
1356 | &setprintlist), |
1357 | &showprintlist); | |
bd5635a1 | 1358 | } |
1eeba686 PB |
1359 | |
1360 | /* Machine specific function to handle SIGWINCH signal. */ | |
1361 | ||
1362 | #ifdef SIGWINCH_HANDLER_BODY | |
1363 | SIGWINCH_HANDLER_BODY | |
1364 | #endif |