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cc61838f WJ |
1 | /*- |
2 | * This code is derived from software copyrighted by the Free Software | |
3 | * Foundation. | |
4 | * | |
5 | * Modified 1991 by Donn Seeley at UUNET Technologies, Inc. | |
6 | * Modified 1990 by Van Jacobson at Lawrence Berkeley Laboratory. | |
7 | * | |
8 | * $Header: utils.c,v 1.6 91/03/07 17:44:30 mccanne Exp $; | |
9 | */ | |
10 | ||
11 | #ifndef lint | |
12 | static char sccsid[] = "@(#)utils.c 6.4 (Berkeley) 5/8/91"; | |
13 | #endif /* not lint */ | |
14 | ||
15 | /* General utility routines for GDB, the GNU debugger. | |
16 | Copyright (C) 1986, 1989 Free Software Foundation, Inc. | |
17 | ||
18 | This file is part of GDB. | |
19 | ||
20 | GDB is free software; you can redistribute it and/or modify | |
21 | it under the terms of the GNU General Public License as published by | |
22 | the Free Software Foundation; either version 1, or (at your option) | |
23 | any later version. | |
24 | ||
25 | GDB is distributed in the hope that it will be useful, | |
26 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | GNU General Public License for more details. | |
29 | ||
30 | You should have received a copy of the GNU General Public License | |
31 | along with GDB; see the file COPYING. If not, write to | |
32 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
33 | ||
34 | #include "param.h" | |
35 | ||
36 | #include <stdio.h> | |
37 | #include <ctype.h> | |
38 | #include <signal.h> | |
39 | #include <sys/ioctl.h> | |
40 | #include <sys/param.h> | |
41 | #include <pwd.h> | |
42 | #include "defs.h" | |
43 | #ifdef HAVE_TERMIO | |
44 | #include <termio.h> | |
45 | #endif | |
46 | ||
47 | /* If this definition isn't overridden by the header files, assume | |
48 | that isatty and fileno exist on this system. */ | |
49 | #ifndef ISATTY | |
50 | #define ISATTY(FP) (isatty (fileno (FP))) | |
51 | #endif | |
52 | ||
53 | extern FILE *instream; | |
54 | ||
55 | void error (); | |
56 | void fatal (); | |
57 | ||
58 | /* Chain of cleanup actions established with make_cleanup, | |
59 | to be executed if an error happens. */ | |
60 | ||
61 | static struct cleanup *cleanup_chain; | |
62 | ||
63 | /* Nonzero means a quit has been requested. */ | |
64 | ||
65 | int quit_flag; | |
66 | ||
67 | /* Nonzero means quit immediately if Control-C is typed now, | |
68 | rather than waiting until QUIT is executed. */ | |
69 | ||
70 | int immediate_quit; | |
71 | \f | |
72 | /* Add a new cleanup to the cleanup_chain, | |
73 | and return the previous chain pointer | |
74 | to be passed later to do_cleanups or discard_cleanups. | |
75 | Args are FUNCTION to clean up with, and ARG to pass to it. */ | |
76 | ||
77 | struct cleanup * | |
78 | make_cleanup (function, arg) | |
79 | void (*function) (); | |
80 | int arg; | |
81 | { | |
82 | register struct cleanup *new | |
83 | = (struct cleanup *) xmalloc (sizeof (struct cleanup)); | |
84 | register struct cleanup *old_chain = cleanup_chain; | |
85 | ||
86 | new->next = cleanup_chain; | |
87 | new->function = function; | |
88 | new->arg = arg; | |
89 | cleanup_chain = new; | |
90 | ||
91 | return old_chain; | |
92 | } | |
93 | ||
94 | /* Discard cleanups and do the actions they describe | |
95 | until we get back to the point OLD_CHAIN in the cleanup_chain. */ | |
96 | ||
97 | void | |
98 | do_cleanups (old_chain) | |
99 | register struct cleanup *old_chain; | |
100 | { | |
101 | register struct cleanup *ptr; | |
102 | while ((ptr = cleanup_chain) != old_chain) | |
103 | { | |
104 | (*ptr->function) (ptr->arg); | |
105 | cleanup_chain = ptr->next; | |
106 | free (ptr); | |
107 | } | |
108 | } | |
109 | ||
110 | /* Discard cleanups, not doing the actions they describe, | |
111 | until we get back to the point OLD_CHAIN in the cleanup_chain. */ | |
112 | ||
113 | void | |
114 | discard_cleanups (old_chain) | |
115 | register struct cleanup *old_chain; | |
116 | { | |
117 | register struct cleanup *ptr; | |
118 | while ((ptr = cleanup_chain) != old_chain) | |
119 | { | |
120 | cleanup_chain = ptr->next; | |
121 | free (ptr); | |
122 | } | |
123 | } | |
124 | ||
125 | /* Set the cleanup_chain to 0, and return the old cleanup chain. */ | |
126 | struct cleanup * | |
127 | save_cleanups () | |
128 | { | |
129 | struct cleanup *old_chain = cleanup_chain; | |
130 | ||
131 | cleanup_chain = 0; | |
132 | return old_chain; | |
133 | } | |
134 | ||
135 | /* Restore the cleanup chain from a previously saved chain. */ | |
136 | void | |
137 | restore_cleanups (chain) | |
138 | struct cleanup *chain; | |
139 | { | |
140 | cleanup_chain = chain; | |
141 | } | |
142 | ||
143 | /* This function is useful for cleanups. | |
144 | Do | |
145 | ||
146 | foo = xmalloc (...); | |
147 | old_chain = make_cleanup (free_current_contents, &foo); | |
148 | ||
149 | to arrange to free the object thus allocated. */ | |
150 | ||
151 | void | |
152 | free_current_contents (location) | |
153 | char **location; | |
154 | { | |
155 | free (*location); | |
156 | } | |
157 | \f | |
158 | /* Generally useful subroutines used throughout the program. */ | |
159 | ||
160 | /* Like malloc but get error if no storage available. */ | |
161 | ||
162 | char * | |
163 | xmalloc (size) | |
164 | long size; | |
165 | { | |
166 | register char *val = (char *) malloc (size); | |
167 | if (!val) | |
168 | fatal ("virtual memory exhausted.", 0); | |
169 | return val; | |
170 | } | |
171 | ||
172 | /* Like realloc but get error if no storage available. */ | |
173 | ||
174 | char * | |
175 | xrealloc (ptr, size) | |
176 | char *ptr; | |
177 | long size; | |
178 | { | |
179 | register char *val = (char *) realloc (ptr, size); | |
180 | if (!val) | |
181 | fatal ("virtual memory exhausted.", 0); | |
182 | return val; | |
183 | } | |
184 | ||
185 | /* Print the system error message for errno, and also mention STRING | |
186 | as the file name for which the error was encountered. | |
187 | Then return to command level. */ | |
188 | ||
189 | void | |
190 | perror_with_name (string) | |
191 | char *string; | |
192 | { | |
193 | extern int sys_nerr; | |
194 | extern char *sys_errlist[]; | |
195 | extern int errno; | |
196 | char *err; | |
197 | char *combined; | |
198 | ||
199 | if (errno < sys_nerr) | |
200 | err = sys_errlist[errno]; | |
201 | else | |
202 | err = "unknown error"; | |
203 | ||
204 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); | |
205 | strcpy (combined, string); | |
206 | strcat (combined, ": "); | |
207 | strcat (combined, err); | |
208 | ||
209 | error ("%s.", combined); | |
210 | } | |
211 | ||
212 | /* Print the system error message for ERRCODE, and also mention STRING | |
213 | as the file name for which the error was encountered. */ | |
214 | ||
215 | void | |
216 | print_sys_errmsg (string, errcode) | |
217 | char *string; | |
218 | int errcode; | |
219 | { | |
220 | extern int sys_nerr; | |
221 | extern char *sys_errlist[]; | |
222 | char *err; | |
223 | char *combined; | |
224 | ||
225 | if (errcode < sys_nerr) | |
226 | err = sys_errlist[errcode]; | |
227 | else | |
228 | err = "unknown error"; | |
229 | ||
230 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); | |
231 | strcpy (combined, string); | |
232 | strcat (combined, ": "); | |
233 | strcat (combined, err); | |
234 | ||
235 | printf ("%s.\n", combined); | |
236 | } | |
237 | ||
238 | void | |
239 | quit () | |
240 | { | |
241 | #ifdef HAVE_TERMIO | |
242 | ioctl (fileno (stdout), TCFLSH, 1); | |
243 | #else /* not HAVE_TERMIO */ | |
244 | ioctl (fileno (stdout), TIOCFLUSH, 0); | |
245 | #endif /* not HAVE_TERMIO */ | |
246 | #ifdef TIOCGPGRP | |
247 | error ("Quit"); | |
248 | #else | |
249 | error ("Quit (expect signal %d when inferior is resumed)", SIGINT); | |
250 | #endif /* TIOCGPGRP */ | |
251 | } | |
252 | ||
253 | /* Control C comes here */ | |
254 | ||
255 | void | |
256 | request_quit () | |
257 | { | |
258 | extern int remote_debugging; | |
259 | ||
260 | quit_flag = 1; | |
261 | ||
262 | #ifdef USG | |
263 | /* Restore the signal handler. */ | |
264 | signal (SIGINT, request_quit); | |
265 | #endif | |
266 | ||
267 | if (immediate_quit) | |
268 | quit(); | |
269 | } | |
270 | ||
271 | /* Print an error message and return to command level. | |
272 | STRING is the error message, used as a fprintf string, | |
273 | and ARG is passed as an argument to it. */ | |
274 | ||
275 | void | |
276 | error (string, arg1, arg2, arg3) | |
277 | char *string; | |
278 | int arg1, arg2, arg3; | |
279 | { | |
280 | terminal_ours (); /* Should be ok even if no inf. */ | |
281 | fflush (stdout); | |
282 | fprintf (stderr, string, arg1, arg2, arg3); | |
283 | fprintf (stderr, "\n"); | |
284 | return_to_top_level (); | |
285 | } | |
286 | ||
287 | /* Print an error message and exit reporting failure. | |
288 | This is for a error that we cannot continue from. | |
289 | STRING and ARG are passed to fprintf. */ | |
290 | ||
291 | void | |
292 | fatal (string, arg) | |
293 | char *string; | |
294 | int arg; | |
295 | { | |
296 | fprintf (stderr, "gdb: "); | |
297 | fprintf (stderr, string, arg); | |
298 | fprintf (stderr, "\n"); | |
299 | exit (1); | |
300 | } | |
301 | ||
302 | /* Print an error message and exit, dumping core. | |
303 | STRING is a printf-style control string, and ARG is a corresponding | |
304 | argument. */ | |
305 | void | |
306 | fatal_dump_core (string, arg) | |
307 | char *string; | |
308 | int arg; | |
309 | { | |
310 | /* "internal error" is always correct, since GDB should never dump | |
311 | core, no matter what the input. */ | |
312 | fprintf (stderr, "gdb internal error: "); | |
313 | fprintf (stderr, string, arg); | |
314 | fprintf (stderr, "\n"); | |
315 | signal (SIGQUIT, SIG_DFL); | |
316 | kill (getpid (), SIGQUIT); | |
317 | /* We should never get here, but just in case... */ | |
318 | exit (1); | |
319 | } | |
320 | ||
321 | /* Make a copy of the string at PTR with SIZE characters | |
322 | (and add a null character at the end in the copy). | |
323 | Uses malloc to get the space. Returns the address of the copy. */ | |
324 | ||
325 | char * | |
326 | savestring (ptr, size) | |
327 | char *ptr; | |
328 | int size; | |
329 | { | |
330 | register char *p = (char *) xmalloc (size + 1); | |
331 | bcopy (ptr, p, size); | |
332 | p[size] = 0; | |
333 | return p; | |
334 | } | |
335 | ||
336 | char * | |
337 | concat (s1, s2, s3) | |
338 | char *s1, *s2, *s3; | |
339 | { | |
340 | register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; | |
341 | register char *val = (char *) xmalloc (len); | |
342 | strcpy (val, s1); | |
343 | strcat (val, s2); | |
344 | strcat (val, s3); | |
345 | return val; | |
346 | } | |
347 | ||
348 | void | |
349 | print_spaces (n, file) | |
350 | register int n; | |
351 | register FILE *file; | |
352 | { | |
353 | while (n-- > 0) | |
354 | fputc (' ', file); | |
355 | } | |
356 | ||
357 | /* Ask user a y-or-n question and return 1 iff answer is yes. | |
358 | Takes three args which are given to printf to print the question. | |
359 | The first, a control string, should end in "? ". | |
360 | It should not say how to answer, because we do that. */ | |
361 | ||
362 | int | |
363 | query (ctlstr, arg1, arg2) | |
364 | char *ctlstr; | |
365 | { | |
366 | register int answer; | |
367 | ||
368 | /* Automatically answer "yes" if input is not from a terminal. */ | |
369 | if (!input_from_terminal_p ()) | |
370 | return 1; | |
371 | ||
372 | while (1) | |
373 | { | |
374 | printf (ctlstr, arg1, arg2); | |
375 | printf ("(y or n) "); | |
376 | fflush (stdout); | |
377 | answer = fgetc (stdin); | |
378 | clearerr (stdin); /* in case of C-d */ | |
379 | if (answer != '\n') | |
380 | while (fgetc (stdin) != '\n') clearerr (stdin); | |
381 | if (answer >= 'a') | |
382 | answer -= 040; | |
383 | if (answer == 'Y') | |
384 | return 1; | |
385 | if (answer == 'N') | |
386 | return 0; | |
387 | printf ("Please answer y or n.\n"); | |
388 | } | |
389 | } | |
390 | \f | |
391 | /* Parse a C escape sequence. STRING_PTR points to a variable | |
392 | containing a pointer to the string to parse. That pointer | |
393 | is updated past the characters we use. The value of the | |
394 | escape sequence is returned. | |
395 | ||
396 | A negative value means the sequence \ newline was seen, | |
397 | which is supposed to be equivalent to nothing at all. | |
398 | ||
399 | If \ is followed by a null character, we return a negative | |
400 | value and leave the string pointer pointing at the null character. | |
401 | ||
402 | If \ is followed by 000, we return 0 and leave the string pointer | |
403 | after the zeros. A value of 0 does not mean end of string. */ | |
404 | ||
405 | int | |
406 | parse_escape (string_ptr) | |
407 | char **string_ptr; | |
408 | { | |
409 | register int c = *(*string_ptr)++; | |
410 | switch (c) | |
411 | { | |
412 | case 'a': | |
413 | return '\a'; | |
414 | case 'b': | |
415 | return '\b'; | |
416 | case 'e': | |
417 | return 033; | |
418 | case 'f': | |
419 | return '\f'; | |
420 | case 'n': | |
421 | return '\n'; | |
422 | case 'r': | |
423 | return '\r'; | |
424 | case 't': | |
425 | return '\t'; | |
426 | case 'v': | |
427 | return '\v'; | |
428 | case '\n': | |
429 | return -2; | |
430 | case 0: | |
431 | (*string_ptr)--; | |
432 | return 0; | |
433 | case '^': | |
434 | c = *(*string_ptr)++; | |
435 | if (c == '\\') | |
436 | c = parse_escape (string_ptr); | |
437 | if (c == '?') | |
438 | return 0177; | |
439 | return (c & 0200) | (c & 037); | |
440 | ||
441 | case '0': | |
442 | case '1': | |
443 | case '2': | |
444 | case '3': | |
445 | case '4': | |
446 | case '5': | |
447 | case '6': | |
448 | case '7': | |
449 | { | |
450 | register int i = c - '0'; | |
451 | register int count = 0; | |
452 | while (++count < 3) | |
453 | { | |
454 | if ((c = *(*string_ptr)++) >= '0' && c <= '7') | |
455 | { | |
456 | i *= 8; | |
457 | i += c - '0'; | |
458 | } | |
459 | else | |
460 | { | |
461 | (*string_ptr)--; | |
462 | break; | |
463 | } | |
464 | } | |
465 | return i; | |
466 | } | |
467 | default: | |
468 | return c; | |
469 | } | |
470 | } | |
471 | \f | |
472 | /* Print the character CH on STREAM as part of the contents | |
473 | of a literal string whose delimiter is QUOTER. */ | |
474 | ||
475 | void | |
476 | printchar (ch, stream, quoter) | |
477 | unsigned char ch; | |
478 | FILE *stream; | |
479 | int quoter; | |
480 | { | |
481 | register int c = ch; | |
482 | if (c < 040 || c >= 0177) | |
483 | switch (c) | |
484 | { | |
485 | case '\n': | |
486 | fputs_filtered ("\\n", stream); | |
487 | break; | |
488 | case '\b': | |
489 | fputs_filtered ("\\b", stream); | |
490 | break; | |
491 | case '\t': | |
492 | fputs_filtered ("\\t", stream); | |
493 | break; | |
494 | case '\f': | |
495 | fputs_filtered ("\\f", stream); | |
496 | break; | |
497 | case '\r': | |
498 | fputs_filtered ("\\r", stream); | |
499 | break; | |
500 | case '\033': | |
501 | fputs_filtered ("\\e", stream); | |
502 | break; | |
503 | case '\007': | |
504 | fputs_filtered ("\\a", stream); | |
505 | break; | |
506 | default: | |
507 | fprintf_filtered (stream, "\\%.3o", (unsigned int) c); | |
508 | break; | |
509 | } | |
510 | else | |
511 | { | |
512 | if (c == '\\' || c == quoter) | |
513 | fputs_filtered ("\\", stream); | |
514 | fprintf_filtered (stream, "%c", c); | |
515 | } | |
516 | } | |
517 | \f | |
518 | static int lines_per_page, lines_printed, chars_per_line, chars_printed; | |
519 | ||
520 | /* Set values of page and line size. */ | |
521 | static void | |
522 | set_screensize_command (arg, from_tty) | |
523 | char *arg; | |
524 | int from_tty; | |
525 | { | |
526 | char *p = arg; | |
527 | char *p1; | |
528 | int tolinesize = lines_per_page; | |
529 | int tocharsize = chars_per_line; | |
530 | ||
531 | if (p == 0) | |
532 | error_no_arg ("set screensize"); | |
533 | ||
534 | while (*p >= '0' && *p <= '9') | |
535 | p++; | |
536 | ||
537 | if (*p && *p != ' ' && *p != '\t') | |
538 | error ("Non-integral argument given to \"set screensize\"."); | |
539 | ||
540 | tolinesize = atoi (arg); | |
541 | ||
542 | while (*p == ' ' || *p == '\t') | |
543 | p++; | |
544 | ||
545 | if (*p) | |
546 | { | |
547 | p1 = p; | |
548 | while (*p1 >= '0' && *p1 <= '9') | |
549 | p1++; | |
550 | ||
551 | if (*p1) | |
552 | error ("Non-integral second argument given to \"set screensize\"."); | |
553 | ||
554 | tocharsize = atoi (p); | |
555 | } | |
556 | ||
557 | lines_per_page = tolinesize; | |
558 | chars_per_line = tocharsize; | |
559 | } | |
560 | ||
561 | static void | |
562 | instream_cleanup(stream) | |
563 | FILE *stream; | |
564 | { | |
565 | instream = stream; | |
566 | } | |
567 | ||
568 | static void | |
569 | prompt_for_continue () | |
570 | { | |
571 | if (ISATTY(stdin) && ISATTY(stdout)) | |
572 | { | |
573 | struct cleanup *old_chain = make_cleanup(instream_cleanup, instream); | |
574 | char *cp, *gdb_readline(); | |
575 | ||
576 | instream = stdin; | |
577 | immediate_quit++; | |
578 | if (cp = gdb_readline ("---Type <return> to continue---")) | |
579 | free(cp); | |
580 | chars_printed = lines_printed = 0; | |
581 | immediate_quit--; | |
582 | do_cleanups(old_chain); | |
583 | } | |
584 | } | |
585 | ||
586 | /* Reinitialize filter; ie. tell it to reset to original values. */ | |
587 | ||
588 | void | |
589 | reinitialize_more_filter () | |
590 | { | |
591 | lines_printed = 0; | |
592 | chars_printed = 0; | |
593 | } | |
594 | ||
595 | static void | |
596 | screensize_info (arg, from_tty) | |
597 | char *arg; | |
598 | int from_tty; | |
599 | { | |
600 | if (arg) | |
601 | error ("\"info screensize\" does not take any arguments."); | |
602 | ||
603 | if (!lines_per_page) | |
604 | printf ("Output more filtering is disabled.\n"); | |
605 | else | |
606 | { | |
607 | printf ("Output more filtering is enabled with\n"); | |
608 | printf ("%d lines per page and %d characters per line.\n", | |
609 | lines_per_page, chars_per_line); | |
610 | } | |
611 | } | |
612 | ||
613 | /* Like fputs but pause after every screenful. | |
614 | Unlike fputs, fputs_filtered does not return a value. | |
615 | It is OK for LINEBUFFER to be NULL, in which case just don't print | |
616 | anything. | |
617 | ||
618 | Note that a longjmp to top level may occur in this routine | |
619 | (since prompt_for_continue may do so) so this routine should not be | |
620 | called when cleanups are not in place. */ | |
621 | ||
622 | void | |
623 | fputs_filtered (linebuffer, stream) | |
624 | char *linebuffer; | |
625 | FILE *stream; | |
626 | { | |
627 | char *lineptr; | |
628 | ||
629 | if (linebuffer == 0) | |
630 | return; | |
631 | ||
632 | /* Don't do any filtering if it is disabled. */ | |
633 | if (stream != stdout || !ISATTY(stdout) || lines_per_page == 0) | |
634 | { | |
635 | fputs (linebuffer, stream); | |
636 | return; | |
637 | } | |
638 | ||
639 | /* Go through and output each character. Show line extension | |
640 | when this is necessary; prompt user for new page when this is | |
641 | necessary. */ | |
642 | ||
643 | lineptr = linebuffer; | |
644 | while (*lineptr) | |
645 | { | |
646 | /* Possible new page. */ | |
647 | if (lines_printed >= lines_per_page - 1) | |
648 | prompt_for_continue (); | |
649 | ||
650 | while (*lineptr && *lineptr != '\n') | |
651 | { | |
652 | /* Print a single line. */ | |
653 | if (*lineptr == '\t') | |
654 | { | |
655 | putc ('\t', stream); | |
656 | /* Shifting right by 3 produces the number of tab stops | |
657 | we have already passed, and then adding one and | |
658 | shifting left 3 advances to the next tab stop. */ | |
659 | chars_printed = ((chars_printed >> 3) + 1) << 3; | |
660 | lineptr++; | |
661 | } | |
662 | else | |
663 | { | |
664 | putc (*lineptr, stream); | |
665 | chars_printed++; | |
666 | lineptr++; | |
667 | } | |
668 | ||
669 | if (chars_printed >= chars_per_line) | |
670 | { | |
671 | chars_printed = 0; | |
672 | lines_printed++; | |
673 | /* Possible new page. */ | |
674 | if (lines_printed >= lines_per_page - 1) | |
675 | prompt_for_continue (); | |
676 | } | |
677 | } | |
678 | ||
679 | if (*lineptr == '\n') | |
680 | { | |
681 | lines_printed++; | |
682 | putc ('\n', stream); | |
683 | lineptr++; | |
684 | chars_printed = 0; | |
685 | } | |
686 | } | |
687 | } | |
688 | ||
689 | /* fputs_demangled is a variant of fputs_filtered that | |
690 | demangles g++ names.*/ | |
691 | ||
692 | void | |
693 | fputs_demangled (linebuffer, stream, arg_mode) | |
694 | char *linebuffer; | |
695 | FILE *stream; | |
696 | { | |
697 | #ifdef __STDC__ | |
698 | extern char *cplus_demangle (const char *, int); | |
699 | #else | |
700 | extern char *cplus_demangle (); | |
701 | #endif | |
702 | #define SYMBOL_MAX 1024 | |
703 | ||
704 | #define SYMBOL_CHAR(c) (isascii(c) && (isalnum(c) || (c) == '_' || (c) == '$')) | |
705 | ||
706 | char buf[SYMBOL_MAX+1]; | |
707 | char *p; | |
708 | ||
709 | if (linebuffer == NULL) | |
710 | return; | |
711 | ||
712 | p = linebuffer; | |
713 | ||
714 | while ( *p != (char) 0 ) { | |
715 | int i = 0; | |
716 | ||
717 | /* collect non-interesting characters into buf */ | |
718 | while ( *p != (char) 0 && !SYMBOL_CHAR(*p) ) { | |
719 | buf[i++] = *p; | |
720 | p++; | |
721 | } | |
722 | if (i > 0) { | |
723 | /* output the non-interesting characters without demangling */ | |
724 | buf[i] = (char) 0; | |
725 | fputs_filtered(buf, stream); | |
726 | i = 0; /* reset buf */ | |
727 | } | |
728 | ||
729 | /* and now the interesting characters */ | |
730 | while (i < SYMBOL_MAX && *p != (char) 0 && SYMBOL_CHAR(*p) ) { | |
731 | buf[i++] = *p; | |
732 | p++; | |
733 | } | |
734 | buf[i] = (char) 0; | |
735 | if (i > 0) { | |
736 | char * result; | |
737 | ||
738 | if ( (result = cplus_demangle(buf, arg_mode)) != NULL ) { | |
739 | fputs_filtered(result, stream); | |
740 | free(result); | |
741 | } | |
742 | else { | |
743 | fputs_filtered(buf, stream); | |
744 | } | |
745 | } | |
746 | } | |
747 | } | |
748 | ||
749 | /* Print ARG1, ARG2, and ARG3 on stdout using format FORMAT. If this | |
750 | information is going to put the amount written since the last call | |
751 | to INIIALIZE_MORE_FILTER or the last page break over the page size, | |
752 | print out a pause message and do a gdb_readline to get the users | |
753 | permision to continue. | |
754 | ||
755 | Unlike fprintf, this function does not return a value. | |
756 | ||
757 | Note that this routine has a restriction that the length of the | |
758 | final output line must be less than 255 characters *or* it must be | |
759 | less than twice the size of the format string. This is a very | |
760 | arbitrary restriction, but it is an internal restriction, so I'll | |
761 | put it in. This means that the %s format specifier is almost | |
762 | useless; unless the caller can GUARANTEE that the string is short | |
763 | enough, fputs_filtered should be used instead. | |
764 | ||
765 | Note also that a longjmp to top level may occur in this routine | |
766 | (since prompt_for_continue may do so) so this routine should not be | |
767 | called when cleanups are not in place. */ | |
768 | ||
769 | void | |
770 | fprintf_filtered (stream, format, arg1, arg2, arg3, arg4, arg5, arg6) | |
771 | FILE *stream; | |
772 | char *format; | |
773 | int arg1, arg2, arg3, arg4, arg5, arg6; | |
774 | { | |
775 | static char *linebuffer = (char *) 0; | |
776 | static int line_size; | |
777 | int format_length = strlen (format); | |
778 | int numchars; | |
779 | ||
780 | /* Allocated linebuffer for the first time. */ | |
781 | if (!linebuffer) | |
782 | { | |
783 | linebuffer = (char *) xmalloc (255); | |
784 | line_size = 255; | |
785 | } | |
786 | ||
787 | /* Reallocate buffer to a larger size if this is necessary. */ | |
788 | if (format_length * 2 > line_size) | |
789 | { | |
790 | line_size = format_length * 2; | |
791 | ||
792 | /* You don't have to copy. */ | |
793 | free (linebuffer); | |
794 | linebuffer = (char *) xmalloc (line_size); | |
795 | } | |
796 | ||
797 | /* This won't blow up if the restrictions described above are | |
798 | followed. */ | |
799 | (void) sprintf (linebuffer, format, arg1, arg2, arg3, arg4, arg5, arg6); | |
800 | ||
801 | fputs_filtered (linebuffer, stream); | |
802 | } | |
803 | ||
804 | void | |
805 | printf_filtered (format, arg1, arg2, arg3, arg4, arg5, arg6) | |
806 | char *format; | |
807 | int arg1, arg2, arg3, arg4, arg5, arg6; | |
808 | { | |
809 | fprintf_filtered (stdout, format, arg1, arg2, arg3, arg4, arg5, arg6); | |
810 | } | |
811 | ||
812 | /* Print N spaces. */ | |
813 | void | |
814 | print_spaces_filtered (n, stream) | |
815 | int n; | |
816 | FILE *stream; | |
817 | { | |
818 | register char *s = (char *) alloca (n + 1); | |
819 | register char *t = s; | |
820 | ||
821 | while (n--) | |
822 | *t++ = ' '; | |
823 | *t = '\0'; | |
824 | ||
825 | fputs_filtered (s, stream); | |
826 | } | |
827 | ||
828 | \f | |
829 | #ifdef USG | |
830 | bcopy (from, to, count) | |
831 | char *from, *to; | |
832 | { | |
833 | memcpy (to, from, count); | |
834 | } | |
835 | ||
836 | bcmp (from, to, count) | |
837 | { | |
838 | return (memcmp (to, from, count)); | |
839 | } | |
840 | ||
841 | bzero (to, count) | |
842 | char *to; | |
843 | { | |
844 | while (count--) | |
845 | *to++ = 0; | |
846 | } | |
847 | ||
848 | getwd (buf) | |
849 | char *buf; | |
850 | { | |
851 | getcwd (buf, MAXPATHLEN); | |
852 | } | |
853 | ||
854 | char * | |
855 | index (s, c) | |
856 | char *s; | |
857 | { | |
858 | char *strchr (); | |
859 | return strchr (s, c); | |
860 | } | |
861 | ||
862 | char * | |
863 | rindex (s, c) | |
864 | char *s; | |
865 | { | |
866 | char *strrchr (); | |
867 | return strrchr (s, c); | |
868 | } | |
869 | ||
870 | #ifndef USG | |
871 | char *sys_siglist[32] = { | |
872 | "SIG0", | |
873 | "SIGHUP", | |
874 | "SIGINT", | |
875 | "SIGQUIT", | |
876 | "SIGILL", | |
877 | "SIGTRAP", | |
878 | "SIGIOT", | |
879 | "SIGEMT", | |
880 | "SIGFPE", | |
881 | "SIGKILL", | |
882 | "SIGBUS", | |
883 | "SIGSEGV", | |
884 | "SIGSYS", | |
885 | "SIGPIPE", | |
886 | "SIGALRM", | |
887 | "SIGTERM", | |
888 | "SIGUSR1", | |
889 | "SIGUSR2", | |
890 | "SIGCLD", | |
891 | "SIGPWR", | |
892 | "SIGWIND", | |
893 | "SIGPHONE", | |
894 | "SIGPOLL", | |
895 | }; | |
896 | #endif | |
897 | ||
898 | /* Queue routines */ | |
899 | ||
900 | struct queue { | |
901 | struct queue *forw; | |
902 | struct queue *back; | |
903 | }; | |
904 | ||
905 | insque (item, after) | |
906 | struct queue *item; | |
907 | struct queue *after; | |
908 | { | |
909 | item->forw = after->forw; | |
910 | after->forw->back = item; | |
911 | ||
912 | item->back = after; | |
913 | after->forw = item; | |
914 | } | |
915 | ||
916 | remque (item) | |
917 | struct queue *item; | |
918 | { | |
919 | item->forw->back = item->back; | |
920 | item->back->forw = item->forw; | |
921 | } | |
922 | #endif /* USG */ | |
923 | \f | |
924 | #ifdef USG | |
925 | /* There is too much variation in Sys V signal numbers and names, so | |
926 | we must initialize them at runtime. */ | |
927 | static char undoc[] = "(undocumented)"; | |
928 | ||
929 | char *sys_siglist[NSIG]; | |
930 | #endif /* USG */ | |
931 | ||
932 | extern struct cmd_list_element *setlist; | |
933 | ||
934 | void | |
935 | _initialize_utils () | |
936 | { | |
937 | int i; | |
938 | add_cmd ("screensize", class_support, set_screensize_command, | |
939 | "Change gdb's notion of the size of the output screen.\n\ | |
940 | The first argument is the number of lines on a page.\n\ | |
941 | The second argument (optional) is the number of characters on a line.", | |
942 | &setlist); | |
943 | add_info ("screensize", screensize_info, | |
944 | "Show gdb's current notion of the size of the output screen."); | |
945 | ||
946 | /* These defaults will be used if we are unable to get the correct | |
947 | values from termcap. */ | |
948 | lines_per_page = 24; | |
949 | chars_per_line = 80; | |
950 | /* Initialize the screen height and width from termcap. */ | |
951 | { | |
952 | int termtype = getenv ("TERM"); | |
953 | ||
954 | /* Positive means success, nonpositive means failure. */ | |
955 | int status; | |
956 | ||
957 | /* 2048 is large enough for all known terminals, according to the | |
958 | GNU termcap manual. */ | |
959 | char term_buffer[2048]; | |
960 | ||
961 | if (termtype) | |
962 | { | |
963 | status = tgetent (term_buffer, termtype); | |
964 | if (status > 0) | |
965 | { | |
966 | int val; | |
967 | ||
968 | val = tgetnum ("li"); | |
969 | if (val >= 0) | |
970 | lines_per_page = val; | |
971 | else | |
972 | /* The number of lines per page is not mentioned | |
973 | in the terminal description. This probably means | |
974 | that paging is not useful (e.g. emacs shell window), | |
975 | so disable paging. */ | |
976 | lines_per_page = 0; | |
977 | ||
978 | val = tgetnum ("co"); | |
979 | if (val >= 0) | |
980 | chars_per_line = val; | |
981 | } | |
982 | } | |
983 | } | |
984 | ||
985 | #ifdef USG | |
986 | /* Initialize signal names. */ | |
987 | for (i = 0; i < NSIG; i++) | |
988 | sys_siglist[i] = undoc; | |
989 | ||
990 | #ifdef SIGHUP | |
991 | sys_siglist[SIGHUP ] = "SIGHUP"; | |
992 | #endif | |
993 | #ifdef SIGINT | |
994 | sys_siglist[SIGINT ] = "SIGINT"; | |
995 | #endif | |
996 | #ifdef SIGQUIT | |
997 | sys_siglist[SIGQUIT ] = "SIGQUIT"; | |
998 | #endif | |
999 | #ifdef SIGILL | |
1000 | sys_siglist[SIGILL ] = "SIGILL"; | |
1001 | #endif | |
1002 | #ifdef SIGTRAP | |
1003 | sys_siglist[SIGTRAP ] = "SIGTRAP"; | |
1004 | #endif | |
1005 | #ifdef SIGIOT | |
1006 | sys_siglist[SIGIOT ] = "SIGIOT"; | |
1007 | #endif | |
1008 | #ifdef SIGEMT | |
1009 | sys_siglist[SIGEMT ] = "SIGEMT"; | |
1010 | #endif | |
1011 | #ifdef SIGFPE | |
1012 | sys_siglist[SIGFPE ] = "SIGFPE"; | |
1013 | #endif | |
1014 | #ifdef SIGKILL | |
1015 | sys_siglist[SIGKILL ] = "SIGKILL"; | |
1016 | #endif | |
1017 | #ifdef SIGBUS | |
1018 | sys_siglist[SIGBUS ] = "SIGBUS"; | |
1019 | #endif | |
1020 | #ifdef SIGSEGV | |
1021 | sys_siglist[SIGSEGV ] = "SIGSEGV"; | |
1022 | #endif | |
1023 | #ifdef SIGSYS | |
1024 | sys_siglist[SIGSYS ] = "SIGSYS"; | |
1025 | #endif | |
1026 | #ifdef SIGPIPE | |
1027 | sys_siglist[SIGPIPE ] = "SIGPIPE"; | |
1028 | #endif | |
1029 | #ifdef SIGALRM | |
1030 | sys_siglist[SIGALRM ] = "SIGALRM"; | |
1031 | #endif | |
1032 | #ifdef SIGTERM | |
1033 | sys_siglist[SIGTERM ] = "SIGTERM"; | |
1034 | #endif | |
1035 | #ifdef SIGUSR1 | |
1036 | sys_siglist[SIGUSR1 ] = "SIGUSR1"; | |
1037 | #endif | |
1038 | #ifdef SIGUSR2 | |
1039 | sys_siglist[SIGUSR2 ] = "SIGUSR2"; | |
1040 | #endif | |
1041 | #ifdef SIGCLD | |
1042 | sys_siglist[SIGCLD ] = "SIGCLD"; | |
1043 | #endif | |
1044 | #ifdef SIGCHLD | |
1045 | sys_siglist[SIGCHLD ] = "SIGCHLD"; | |
1046 | #endif | |
1047 | #ifdef SIGPWR | |
1048 | sys_siglist[SIGPWR ] = "SIGPWR"; | |
1049 | #endif | |
1050 | #ifdef SIGTSTP | |
1051 | sys_siglist[SIGTSTP ] = "SIGTSTP"; | |
1052 | #endif | |
1053 | #ifdef SIGTTIN | |
1054 | sys_siglist[SIGTTIN ] = "SIGTTIN"; | |
1055 | #endif | |
1056 | #ifdef SIGTTOU | |
1057 | sys_siglist[SIGTTOU ] = "SIGTTOU"; | |
1058 | #endif | |
1059 | #ifdef SIGSTOP | |
1060 | sys_siglist[SIGSTOP ] = "SIGSTOP"; | |
1061 | #endif | |
1062 | #ifdef SIGXCPU | |
1063 | sys_siglist[SIGXCPU ] = "SIGXCPU"; | |
1064 | #endif | |
1065 | #ifdef SIGXFSZ | |
1066 | sys_siglist[SIGXFSZ ] = "SIGXFSZ"; | |
1067 | #endif | |
1068 | #ifdef SIGVTALRM | |
1069 | sys_siglist[SIGVTALRM ] = "SIGVTALRM"; | |
1070 | #endif | |
1071 | #ifdef SIGPROF | |
1072 | sys_siglist[SIGPROF ] = "SIGPROF"; | |
1073 | #endif | |
1074 | #ifdef SIGWINCH | |
1075 | sys_siglist[SIGWINCH ] = "SIGWINCH"; | |
1076 | #endif | |
1077 | #ifdef SIGCONT | |
1078 | sys_siglist[SIGCONT ] = "SIGCONT"; | |
1079 | #endif | |
1080 | #ifdef SIGURG | |
1081 | sys_siglist[SIGURG ] = "SIGURG"; | |
1082 | #endif | |
1083 | #ifdef SIGIO | |
1084 | sys_siglist[SIGIO ] = "SIGIO"; | |
1085 | #endif | |
1086 | #ifdef SIGWIND | |
1087 | sys_siglist[SIGWIND ] = "SIGWIND"; | |
1088 | #endif | |
1089 | #ifdef SIGPHONE | |
1090 | sys_siglist[SIGPHONE ] = "SIGPHONE"; | |
1091 | #endif | |
1092 | #ifdef SIGPOLL | |
1093 | sys_siglist[SIGPOLL ] = "SIGPOLL"; | |
1094 | #endif | |
1095 | #endif /* USG */ | |
1096 | } |