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bd5635a1 RP |
1 | /* General utility routines for GDB, the GNU debugger. |
2 | Copyright (C) 1986, 1989, 1990, 1991 Free Software Foundation, Inc. | |
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 RP |
19 | |
20 | #include <stdio.h> | |
21 | #include <sys/ioctl.h> | |
22 | #include <sys/param.h> | |
23 | #include <pwd.h> | |
24 | #include "defs.h" | |
25 | #include "param.h" | |
26 | #include "signals.h" | |
27 | #include "gdbcmd.h" | |
28 | #include "terminal.h" | |
29 | #include <varargs.h> | |
30 | #include <ctype.h> | |
31 | #include <string.h> | |
32 | #include "bfd.h" | |
33 | #include "target.h" | |
34 | ||
35 | extern volatile void return_to_top_level (); | |
36 | extern volatile void exit (); | |
37 | extern char *gdb_readline (); | |
38 | extern char *getenv(); | |
39 | extern char *malloc(); | |
40 | extern char *realloc(); | |
41 | ||
42 | /* If this definition isn't overridden by the header files, assume | |
43 | that isatty and fileno exist on this system. */ | |
44 | #ifndef ISATTY | |
45 | #define ISATTY(FP) (isatty (fileno (FP))) | |
46 | #endif | |
47 | ||
48 | #ifdef MISSING_VPRINTF | |
49 | #ifdef __GNU_LIBRARY | |
50 | #undef MISSING_VPRINTF | |
51 | #else /* !__GNU_LIBRARY */ | |
52 | ||
53 | #ifndef vfprintf | |
54 | #define vfprintf(file, format, ap) _doprnt (format, ap, file) | |
55 | #endif /* vfprintf */ | |
56 | ||
57 | #ifndef vprintf | |
58 | /* Can't #define it since printcmd.c needs it */ | |
59 | void | |
60 | vprintf (format, ap) | |
d11c44f1 | 61 | char *format; |
351b221d | 62 | va_list ap; |
bd5635a1 RP |
63 | { |
64 | vfprintf (stdout, format, ap); | |
65 | } | |
66 | #endif /* vprintf */ | |
67 | ||
68 | #endif /* GNU_LIBRARY */ | |
69 | #endif /* MISSING_VPRINTF */ | |
70 | ||
71 | void error (); | |
72 | void fatal (); | |
73 | ||
74 | /* Chain of cleanup actions established with make_cleanup, | |
75 | to be executed if an error happens. */ | |
76 | ||
77 | static struct cleanup *cleanup_chain; | |
78 | ||
79 | /* Nonzero means a quit has been requested. */ | |
80 | ||
81 | int quit_flag; | |
82 | ||
83 | /* Nonzero means quit immediately if Control-C is typed now, | |
84 | rather than waiting until QUIT is executed. */ | |
85 | ||
86 | int immediate_quit; | |
87 | ||
88 | /* Nonzero means that encoded C++ names should be printed out in their | |
89 | C++ form rather than raw. */ | |
90 | ||
91 | int demangle = 1; | |
92 | ||
93 | /* Nonzero means that encoded C++ names should be printed out in their | |
94 | C++ form even in assembler language displays. If this is set, but | |
95 | DEMANGLE is zero, names are printed raw, i.e. DEMANGLE controls. */ | |
96 | ||
97 | int asm_demangle = 0; | |
98 | ||
99 | /* Nonzero means that strings with character values >0x7F should be printed | |
100 | as octal escapes. Zero means just print the value (e.g. it's an | |
101 | international character, and the terminal or window can cope.) */ | |
102 | ||
103 | int sevenbit_strings = 0; | |
81066208 JG |
104 | |
105 | /* String to be printed before error messages, if any. */ | |
106 | ||
107 | char *error_pre_print; | |
bd5635a1 RP |
108 | \f |
109 | /* Add a new cleanup to the cleanup_chain, | |
110 | and return the previous chain pointer | |
111 | to be passed later to do_cleanups or discard_cleanups. | |
112 | Args are FUNCTION to clean up with, and ARG to pass to it. */ | |
113 | ||
114 | struct cleanup * | |
115 | make_cleanup (function, arg) | |
116 | void (*function) (); | |
117 | int arg; | |
118 | { | |
119 | register struct cleanup *new | |
120 | = (struct cleanup *) xmalloc (sizeof (struct cleanup)); | |
121 | register struct cleanup *old_chain = cleanup_chain; | |
122 | ||
123 | new->next = cleanup_chain; | |
124 | new->function = function; | |
125 | new->arg = arg; | |
126 | cleanup_chain = new; | |
127 | ||
128 | return old_chain; | |
129 | } | |
130 | ||
131 | /* Discard cleanups and do the actions they describe | |
132 | until we get back to the point OLD_CHAIN in the cleanup_chain. */ | |
133 | ||
134 | void | |
135 | do_cleanups (old_chain) | |
136 | register struct cleanup *old_chain; | |
137 | { | |
138 | register struct cleanup *ptr; | |
139 | while ((ptr = cleanup_chain) != old_chain) | |
140 | { | |
5e5215eb | 141 | cleanup_chain = ptr->next; /* Do this first incase recursion */ |
bd5635a1 | 142 | (*ptr->function) (ptr->arg); |
bd5635a1 RP |
143 | free (ptr); |
144 | } | |
145 | } | |
146 | ||
147 | /* Discard cleanups, not doing the actions they describe, | |
148 | until we get back to the point OLD_CHAIN in the cleanup_chain. */ | |
149 | ||
150 | void | |
151 | discard_cleanups (old_chain) | |
152 | register struct cleanup *old_chain; | |
153 | { | |
154 | register struct cleanup *ptr; | |
155 | while ((ptr = cleanup_chain) != old_chain) | |
156 | { | |
157 | cleanup_chain = ptr->next; | |
158 | free (ptr); | |
159 | } | |
160 | } | |
161 | ||
162 | /* Set the cleanup_chain to 0, and return the old cleanup chain. */ | |
163 | struct cleanup * | |
164 | save_cleanups () | |
165 | { | |
166 | struct cleanup *old_chain = cleanup_chain; | |
167 | ||
168 | cleanup_chain = 0; | |
169 | return old_chain; | |
170 | } | |
171 | ||
172 | /* Restore the cleanup chain from a previously saved chain. */ | |
173 | void | |
174 | restore_cleanups (chain) | |
175 | struct cleanup *chain; | |
176 | { | |
177 | cleanup_chain = chain; | |
178 | } | |
179 | ||
180 | /* This function is useful for cleanups. | |
181 | Do | |
182 | ||
183 | foo = xmalloc (...); | |
184 | old_chain = make_cleanup (free_current_contents, &foo); | |
185 | ||
186 | to arrange to free the object thus allocated. */ | |
187 | ||
188 | void | |
189 | free_current_contents (location) | |
190 | char **location; | |
191 | { | |
192 | free (*location); | |
193 | } | |
194 | \f | |
195 | /* Print an error message and return to command level. | |
196 | The first argument STRING is the error message, used as a fprintf string, | |
197 | and the remaining args are passed as arguments to it. */ | |
198 | ||
199 | /* VARARGS */ | |
200 | void | |
201 | error (va_alist) | |
202 | va_dcl | |
203 | { | |
204 | va_list args; | |
205 | char *string; | |
206 | ||
207 | va_start (args); | |
208 | target_terminal_ours (); | |
209 | fflush (stdout); | |
81066208 JG |
210 | if (error_pre_print) |
211 | fprintf (stderr, error_pre_print); | |
bd5635a1 RP |
212 | string = va_arg (args, char *); |
213 | vfprintf (stderr, string, args); | |
214 | fprintf (stderr, "\n"); | |
215 | va_end (args); | |
216 | return_to_top_level (); | |
217 | } | |
218 | ||
219 | /* Print an error message and exit reporting failure. | |
220 | This is for a error that we cannot continue from. | |
221 | The arguments are printed a la printf. */ | |
222 | ||
223 | /* VARARGS */ | |
224 | void | |
225 | fatal (va_alist) | |
226 | va_dcl | |
227 | { | |
228 | va_list args; | |
229 | char *string; | |
230 | ||
231 | va_start (args); | |
232 | string = va_arg (args, char *); | |
233 | fprintf (stderr, "gdb: "); | |
234 | vfprintf (stderr, string, args); | |
235 | fprintf (stderr, "\n"); | |
236 | va_end (args); | |
237 | exit (1); | |
238 | } | |
239 | ||
240 | /* Print an error message and exit, dumping core. | |
241 | The arguments are printed a la printf (). */ | |
242 | /* VARARGS */ | |
243 | void | |
244 | fatal_dump_core (va_alist) | |
245 | va_dcl | |
246 | { | |
247 | va_list args; | |
248 | char *string; | |
249 | ||
250 | va_start (args); | |
251 | string = va_arg (args, char *); | |
252 | /* "internal error" is always correct, since GDB should never dump | |
253 | core, no matter what the input. */ | |
254 | fprintf (stderr, "gdb internal error: "); | |
255 | vfprintf (stderr, string, args); | |
256 | fprintf (stderr, "\n"); | |
257 | va_end (args); | |
258 | ||
259 | signal (SIGQUIT, SIG_DFL); | |
260 | kill (getpid (), SIGQUIT); | |
261 | /* We should never get here, but just in case... */ | |
262 | exit (1); | |
263 | } | |
264 | \f | |
265 | /* Memory management stuff (malloc friends). */ | |
266 | ||
267 | #if defined (NO_MALLOC_CHECK) | |
268 | void | |
269 | init_malloc () | |
270 | {} | |
271 | #else /* Have mcheck(). */ | |
272 | static void | |
273 | malloc_botch () | |
274 | { | |
275 | fatal_dump_core ("Memory corruption"); | |
276 | } | |
277 | ||
278 | void | |
279 | init_malloc () | |
280 | { | |
281 | mcheck (malloc_botch); | |
f266e564 | 282 | mtrace (); |
bd5635a1 RP |
283 | } |
284 | #endif /* Have mcheck(). */ | |
285 | ||
286 | /* Like malloc but get error if no storage available. */ | |
287 | ||
288 | #ifdef __STDC__ | |
289 | void * | |
290 | #else | |
291 | char * | |
292 | #endif | |
293 | xmalloc (size) | |
294 | long size; | |
295 | { | |
296 | register char *val; | |
297 | ||
298 | /* At least one place (dbxread.c:condense_misc_bunches where misc_count == 0) | |
299 | GDB wants to allocate zero bytes. */ | |
300 | if (size == 0) | |
301 | return NULL; | |
302 | ||
303 | val = (char *) malloc (size); | |
304 | if (!val) | |
305 | fatal ("virtual memory exhausted.", 0); | |
306 | return val; | |
307 | } | |
308 | ||
309 | /* Like realloc but get error if no storage available. */ | |
310 | ||
311 | #ifdef __STDC__ | |
312 | void * | |
313 | #else | |
314 | char * | |
315 | #endif | |
316 | xrealloc (ptr, size) | |
317 | char *ptr; | |
318 | long size; | |
319 | { | |
320 | register char *val = (char *) realloc (ptr, size); | |
321 | if (!val) | |
322 | fatal ("virtual memory exhausted.", 0); | |
323 | return val; | |
324 | } | |
325 | ||
326 | /* Print the system error message for errno, and also mention STRING | |
327 | as the file name for which the error was encountered. | |
328 | Then return to command level. */ | |
329 | ||
330 | void | |
331 | perror_with_name (string) | |
332 | char *string; | |
333 | { | |
334 | extern int sys_nerr; | |
335 | extern char *sys_errlist[]; | |
336 | char *err; | |
337 | char *combined; | |
338 | ||
339 | if (errno < sys_nerr) | |
340 | err = sys_errlist[errno]; | |
341 | else | |
342 | err = "unknown error"; | |
343 | ||
344 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); | |
345 | strcpy (combined, string); | |
346 | strcat (combined, ": "); | |
347 | strcat (combined, err); | |
348 | ||
349 | /* I understand setting these is a matter of taste. Still, some people | |
350 | may clear errno but not know about bfd_error. Doing this here is not | |
351 | unreasonable. */ | |
352 | bfd_error = no_error; | |
353 | errno = 0; | |
354 | ||
355 | error ("%s.", combined); | |
356 | } | |
357 | ||
358 | /* Print the system error message for ERRCODE, and also mention STRING | |
359 | as the file name for which the error was encountered. */ | |
360 | ||
361 | void | |
362 | print_sys_errmsg (string, errcode) | |
363 | char *string; | |
364 | int errcode; | |
365 | { | |
366 | extern int sys_nerr; | |
367 | extern char *sys_errlist[]; | |
368 | char *err; | |
369 | char *combined; | |
370 | ||
371 | if (errcode < sys_nerr) | |
372 | err = sys_errlist[errcode]; | |
373 | else | |
374 | err = "unknown error"; | |
375 | ||
376 | combined = (char *) alloca (strlen (err) + strlen (string) + 3); | |
377 | strcpy (combined, string); | |
378 | strcat (combined, ": "); | |
379 | strcat (combined, err); | |
380 | ||
381 | printf ("%s.\n", combined); | |
382 | } | |
383 | ||
384 | /* Control C eventually causes this to be called, at a convenient time. */ | |
385 | ||
386 | void | |
387 | quit () | |
388 | { | |
389 | target_terminal_ours (); | |
d11c44f1 | 390 | wrap_here ((char *)0); /* Force out any pending output */ |
bd5635a1 RP |
391 | #ifdef HAVE_TERMIO |
392 | ioctl (fileno (stdout), TCFLSH, 1); | |
393 | #else /* not HAVE_TERMIO */ | |
394 | ioctl (fileno (stdout), TIOCFLUSH, 0); | |
395 | #endif /* not HAVE_TERMIO */ | |
396 | #ifdef TIOCGPGRP | |
397 | error ("Quit"); | |
398 | #else | |
399 | error ("Quit (expect signal %d when inferior is resumed)", SIGINT); | |
400 | #endif /* TIOCGPGRP */ | |
401 | } | |
402 | ||
403 | /* Control C comes here */ | |
404 | ||
405 | void | |
406 | request_quit () | |
407 | { | |
408 | quit_flag = 1; | |
409 | ||
410 | #ifdef USG | |
411 | /* Restore the signal handler. */ | |
412 | signal (SIGINT, request_quit); | |
413 | #endif | |
414 | ||
415 | if (immediate_quit) | |
416 | quit (); | |
417 | } | |
418 | \f | |
419 | /* My replacement for the read system call. | |
420 | Used like `read' but keeps going if `read' returns too soon. */ | |
421 | ||
422 | int | |
423 | myread (desc, addr, len) | |
424 | int desc; | |
425 | char *addr; | |
426 | int len; | |
427 | { | |
428 | register int val; | |
429 | int orglen = len; | |
430 | ||
431 | while (len > 0) | |
432 | { | |
433 | val = read (desc, addr, len); | |
434 | if (val < 0) | |
435 | return val; | |
436 | if (val == 0) | |
437 | return orglen - len; | |
438 | len -= val; | |
439 | addr += val; | |
440 | } | |
441 | return orglen; | |
442 | } | |
443 | \f | |
444 | /* Make a copy of the string at PTR with SIZE characters | |
445 | (and add a null character at the end in the copy). | |
446 | Uses malloc to get the space. Returns the address of the copy. */ | |
447 | ||
448 | char * | |
449 | savestring (ptr, size) | |
450 | char *ptr; | |
451 | int size; | |
452 | { | |
453 | register char *p = (char *) xmalloc (size + 1); | |
454 | bcopy (ptr, p, size); | |
455 | p[size] = 0; | |
456 | return p; | |
457 | } | |
458 | ||
8aa13b87 JK |
459 | /* The "const" is so it compiles under DGUX (which prototypes strsave |
460 | in <string.h>. FIXME: This should be named "xstrsave", shouldn't it? | |
461 | Doesn't real strsave return NULL if out of memory? */ | |
bd5635a1 RP |
462 | char * |
463 | strsave (ptr) | |
8aa13b87 | 464 | const char *ptr; |
bd5635a1 RP |
465 | { |
466 | return savestring (ptr, strlen (ptr)); | |
467 | } | |
468 | ||
469 | char * | |
470 | concat (s1, s2, s3) | |
471 | char *s1, *s2, *s3; | |
472 | { | |
473 | register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1; | |
474 | register char *val = (char *) xmalloc (len); | |
475 | strcpy (val, s1); | |
476 | strcat (val, s2); | |
477 | strcat (val, s3); | |
478 | return val; | |
479 | } | |
480 | ||
481 | void | |
482 | print_spaces (n, file) | |
483 | register int n; | |
484 | register FILE *file; | |
485 | { | |
486 | while (n-- > 0) | |
487 | fputc (' ', file); | |
488 | } | |
489 | ||
490 | /* Ask user a y-or-n question and return 1 iff answer is yes. | |
491 | Takes three args which are given to printf to print the question. | |
492 | The first, a control string, should end in "? ". | |
493 | It should not say how to answer, because we do that. */ | |
494 | ||
495 | /* VARARGS */ | |
496 | int | |
497 | query (va_alist) | |
498 | va_dcl | |
499 | { | |
500 | va_list args; | |
501 | char *ctlstr; | |
502 | register int answer; | |
503 | register int ans2; | |
504 | ||
505 | /* Automatically answer "yes" if input is not from a terminal. */ | |
506 | if (!input_from_terminal_p ()) | |
507 | return 1; | |
508 | ||
509 | while (1) | |
510 | { | |
511 | va_start (args); | |
512 | ctlstr = va_arg (args, char *); | |
513 | vfprintf (stdout, ctlstr, args); | |
514 | va_end (args); | |
515 | printf ("(y or n) "); | |
516 | fflush (stdout); | |
517 | answer = fgetc (stdin); | |
518 | clearerr (stdin); /* in case of C-d */ | |
519 | if (answer == EOF) /* C-d */ | |
520 | return 1; | |
521 | if (answer != '\n') /* Eat rest of input line, to EOF or newline */ | |
522 | do | |
523 | { | |
524 | ans2 = fgetc (stdin); | |
525 | clearerr (stdin); | |
526 | } | |
527 | while (ans2 != EOF && ans2 != '\n'); | |
528 | if (answer >= 'a') | |
529 | answer -= 040; | |
530 | if (answer == 'Y') | |
531 | return 1; | |
532 | if (answer == 'N') | |
533 | return 0; | |
534 | printf ("Please answer y or n.\n"); | |
535 | } | |
536 | } | |
537 | \f | |
538 | /* Parse a C escape sequence. STRING_PTR points to a variable | |
539 | containing a pointer to the string to parse. That pointer | |
540 | should point to the character after the \. That pointer | |
541 | is updated past the characters we use. The value of the | |
542 | escape sequence is returned. | |
543 | ||
544 | A negative value means the sequence \ newline was seen, | |
545 | which is supposed to be equivalent to nothing at all. | |
546 | ||
547 | If \ is followed by a null character, we return a negative | |
548 | value and leave the string pointer pointing at the null character. | |
549 | ||
550 | If \ is followed by 000, we return 0 and leave the string pointer | |
551 | after the zeros. A value of 0 does not mean end of string. */ | |
552 | ||
553 | int | |
554 | parse_escape (string_ptr) | |
555 | char **string_ptr; | |
556 | { | |
557 | register int c = *(*string_ptr)++; | |
558 | switch (c) | |
559 | { | |
560 | case 'a': | |
561 | return '\a'; | |
562 | case 'b': | |
563 | return '\b'; | |
564 | case 'e': | |
565 | return 033; | |
566 | case 'f': | |
567 | return '\f'; | |
568 | case 'n': | |
569 | return '\n'; | |
570 | case 'r': | |
571 | return '\r'; | |
572 | case 't': | |
573 | return '\t'; | |
574 | case 'v': | |
575 | return '\v'; | |
576 | case '\n': | |
577 | return -2; | |
578 | case 0: | |
579 | (*string_ptr)--; | |
580 | return 0; | |
581 | case '^': | |
582 | c = *(*string_ptr)++; | |
583 | if (c == '\\') | |
584 | c = parse_escape (string_ptr); | |
585 | if (c == '?') | |
586 | return 0177; | |
587 | return (c & 0200) | (c & 037); | |
588 | ||
589 | case '0': | |
590 | case '1': | |
591 | case '2': | |
592 | case '3': | |
593 | case '4': | |
594 | case '5': | |
595 | case '6': | |
596 | case '7': | |
597 | { | |
598 | register int i = c - '0'; | |
599 | register int count = 0; | |
600 | while (++count < 3) | |
601 | { | |
602 | if ((c = *(*string_ptr)++) >= '0' && c <= '7') | |
603 | { | |
604 | i *= 8; | |
605 | i += c - '0'; | |
606 | } | |
607 | else | |
608 | { | |
609 | (*string_ptr)--; | |
610 | break; | |
611 | } | |
612 | } | |
613 | return i; | |
614 | } | |
615 | default: | |
616 | return c; | |
617 | } | |
618 | } | |
619 | \f | |
620 | /* Print the character CH on STREAM as part of the contents | |
621 | of a literal string whose delimiter is QUOTER. */ | |
622 | ||
623 | void | |
624 | printchar (ch, stream, quoter) | |
625 | unsigned char ch; | |
626 | FILE *stream; | |
627 | int quoter; | |
628 | { | |
629 | register int c = ch; | |
630 | ||
631 | if (c < 040 || (sevenbit_strings && c >= 0177)) | |
632 | switch (c) | |
633 | { | |
634 | case '\n': | |
635 | fputs_filtered ("\\n", stream); | |
636 | break; | |
637 | case '\b': | |
638 | fputs_filtered ("\\b", stream); | |
639 | break; | |
640 | case '\t': | |
641 | fputs_filtered ("\\t", stream); | |
642 | break; | |
643 | case '\f': | |
644 | fputs_filtered ("\\f", stream); | |
645 | break; | |
646 | case '\r': | |
647 | fputs_filtered ("\\r", stream); | |
648 | break; | |
649 | case '\033': | |
650 | fputs_filtered ("\\e", stream); | |
651 | break; | |
652 | case '\007': | |
653 | fputs_filtered ("\\a", stream); | |
654 | break; | |
655 | default: | |
656 | fprintf_filtered (stream, "\\%.3o", (unsigned int) c); | |
657 | break; | |
658 | } | |
659 | else | |
660 | { | |
661 | if (c == '\\' || c == quoter) | |
662 | fputs_filtered ("\\", stream); | |
663 | fprintf_filtered (stream, "%c", c); | |
664 | } | |
665 | } | |
666 | \f | |
667 | /* Number of lines per page or UINT_MAX if paging is disabled. */ | |
668 | static unsigned int lines_per_page; | |
669 | /* Number of chars per line or UNIT_MAX is line folding is disabled. */ | |
670 | static unsigned int chars_per_line; | |
671 | /* Current count of lines printed on this page, chars on this line. */ | |
672 | static unsigned int lines_printed, chars_printed; | |
673 | ||
674 | /* Buffer and start column of buffered text, for doing smarter word- | |
675 | wrapping. When someone calls wrap_here(), we start buffering output | |
676 | that comes through fputs_filtered(). If we see a newline, we just | |
677 | spit it out and forget about the wrap_here(). If we see another | |
678 | wrap_here(), we spit it out and remember the newer one. If we see | |
679 | the end of the line, we spit out a newline, the indent, and then | |
680 | the buffered output. | |
681 | ||
682 | wrap_column is the column number on the screen where wrap_buffer begins. | |
683 | When wrap_column is zero, wrapping is not in effect. | |
684 | wrap_buffer is malloc'd with chars_per_line+2 bytes. | |
685 | When wrap_buffer[0] is null, the buffer is empty. | |
686 | wrap_pointer points into it at the next character to fill. | |
687 | wrap_indent is the string that should be used as indentation if the | |
688 | wrap occurs. */ | |
689 | ||
690 | static char *wrap_buffer, *wrap_pointer, *wrap_indent; | |
691 | static int wrap_column; | |
692 | ||
693 | /* Get the number of lines to print with commands like "list". | |
694 | This is based on guessing how many long (i.e. more than chars_per_line | |
695 | characters) lines there will be. To be completely correct, "list" | |
696 | and friends should be rewritten to count characters and see where | |
697 | things are wrapping, but that would be a fair amount of work. */ | |
698 | int | |
699 | lines_to_list () | |
700 | { | |
701 | /* RMS didn't like the following algorithm. Let's set it back to | |
702 | 10 and see if anyone else complains. */ | |
703 | /* return lines_per_page == UINT_MAX ? 10 : lines_per_page / 2; */ | |
704 | return 10; | |
705 | } | |
706 | ||
e1ce8aa5 | 707 | /* ARGSUSED */ |
bd5635a1 RP |
708 | static void |
709 | set_width_command (args, from_tty, c) | |
710 | char *args; | |
711 | int from_tty; | |
712 | struct cmd_list_element *c; | |
713 | { | |
714 | if (!wrap_buffer) | |
715 | { | |
716 | wrap_buffer = (char *) xmalloc (chars_per_line + 2); | |
717 | wrap_buffer[0] = '\0'; | |
718 | } | |
719 | else | |
720 | wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2); | |
721 | wrap_pointer = wrap_buffer; /* Start it at the beginning */ | |
722 | } | |
723 | ||
724 | static void | |
725 | prompt_for_continue () | |
726 | { | |
351b221d JG |
727 | char *ignore; |
728 | ||
bd5635a1 | 729 | immediate_quit++; |
351b221d JG |
730 | ignore = gdb_readline ("---Type <return> to continue---"); |
731 | if (ignore) | |
732 | free (ignore); | |
bd5635a1 RP |
733 | chars_printed = lines_printed = 0; |
734 | immediate_quit--; | |
351b221d | 735 | dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */ |
bd5635a1 RP |
736 | } |
737 | ||
738 | /* Reinitialize filter; ie. tell it to reset to original values. */ | |
739 | ||
740 | void | |
741 | reinitialize_more_filter () | |
742 | { | |
743 | lines_printed = 0; | |
744 | chars_printed = 0; | |
745 | } | |
746 | ||
747 | /* Indicate that if the next sequence of characters overflows the line, | |
748 | a newline should be inserted here rather than when it hits the end. | |
749 | If INDENT is nonzero, it is a string to be printed to indent the | |
750 | wrapped part on the next line. INDENT must remain accessible until | |
751 | the next call to wrap_here() or until a newline is printed through | |
752 | fputs_filtered(). | |
753 | ||
754 | If the line is already overfull, we immediately print a newline and | |
755 | the indentation, and disable further wrapping. | |
756 | ||
757 | INDENT should not contain tabs, as that | |
758 | will mess up the char count on the next line. FIXME. */ | |
759 | ||
760 | void | |
761 | wrap_here(indent) | |
762 | char *indent; | |
763 | { | |
764 | if (wrap_buffer[0]) | |
765 | { | |
766 | *wrap_pointer = '\0'; | |
767 | fputs (wrap_buffer, stdout); | |
768 | } | |
769 | wrap_pointer = wrap_buffer; | |
770 | wrap_buffer[0] = '\0'; | |
771 | if (chars_printed >= chars_per_line) | |
772 | { | |
773 | puts_filtered ("\n"); | |
774 | puts_filtered (indent); | |
775 | wrap_column = 0; | |
776 | } | |
777 | else | |
778 | { | |
779 | wrap_column = chars_printed; | |
780 | wrap_indent = indent; | |
781 | } | |
782 | } | |
783 | ||
784 | /* Like fputs but pause after every screenful, and can wrap at points | |
785 | other than the final character of a line. | |
786 | Unlike fputs, fputs_filtered does not return a value. | |
787 | It is OK for LINEBUFFER to be NULL, in which case just don't print | |
788 | anything. | |
789 | ||
790 | Note that a longjmp to top level may occur in this routine | |
791 | (since prompt_for_continue may do so) so this routine should not be | |
792 | called when cleanups are not in place. */ | |
793 | ||
794 | void | |
795 | fputs_filtered (linebuffer, stream) | |
796 | char *linebuffer; | |
797 | FILE *stream; | |
798 | { | |
799 | char *lineptr; | |
800 | ||
801 | if (linebuffer == 0) | |
802 | return; | |
803 | ||
804 | /* Don't do any filtering if it is disabled. */ | |
805 | if (stream != stdout | |
806 | || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX)) | |
807 | { | |
808 | fputs (linebuffer, stream); | |
809 | return; | |
810 | } | |
811 | ||
812 | /* Go through and output each character. Show line extension | |
813 | when this is necessary; prompt user for new page when this is | |
814 | necessary. */ | |
815 | ||
816 | lineptr = linebuffer; | |
817 | while (*lineptr) | |
818 | { | |
819 | /* Possible new page. */ | |
820 | if (lines_printed >= lines_per_page - 1) | |
821 | prompt_for_continue (); | |
822 | ||
823 | while (*lineptr && *lineptr != '\n') | |
824 | { | |
825 | /* Print a single line. */ | |
826 | if (*lineptr == '\t') | |
827 | { | |
828 | if (wrap_column) | |
829 | *wrap_pointer++ = '\t'; | |
830 | else | |
831 | putc ('\t', stream); | |
832 | /* Shifting right by 3 produces the number of tab stops | |
833 | we have already passed, and then adding one and | |
834 | shifting left 3 advances to the next tab stop. */ | |
835 | chars_printed = ((chars_printed >> 3) + 1) << 3; | |
836 | lineptr++; | |
837 | } | |
838 | else | |
839 | { | |
840 | if (wrap_column) | |
841 | *wrap_pointer++ = *lineptr; | |
842 | else | |
843 | putc (*lineptr, stream); | |
844 | chars_printed++; | |
845 | lineptr++; | |
846 | } | |
847 | ||
848 | if (chars_printed >= chars_per_line) | |
849 | { | |
850 | unsigned int save_chars = chars_printed; | |
851 | ||
852 | chars_printed = 0; | |
853 | lines_printed++; | |
854 | /* If we aren't actually wrapping, don't output newline -- | |
855 | if chars_per_line is right, we probably just overflowed | |
856 | anyway; if it's wrong, let us keep going. */ | |
857 | if (wrap_column) | |
858 | putc ('\n', stream); | |
859 | ||
860 | /* Possible new page. */ | |
861 | if (lines_printed >= lines_per_page - 1) | |
862 | prompt_for_continue (); | |
863 | ||
864 | /* Now output indentation and wrapped string */ | |
865 | if (wrap_column) | |
866 | { | |
867 | if (wrap_indent) | |
868 | fputs (wrap_indent, stream); | |
869 | *wrap_pointer = '\0'; /* Null-terminate saved stuff */ | |
870 | fputs (wrap_buffer, stream); /* and eject it */ | |
871 | /* FIXME, this strlen is what prevents wrap_indent from | |
872 | containing tabs. However, if we recurse to print it | |
873 | and count its chars, we risk trouble if wrap_indent is | |
874 | longer than (the user settable) chars_per_line. | |
875 | Note also that this can set chars_printed > chars_per_line | |
876 | if we are printing a long string. */ | |
877 | chars_printed = strlen (wrap_indent) | |
878 | + (save_chars - wrap_column); | |
879 | wrap_pointer = wrap_buffer; /* Reset buffer */ | |
880 | wrap_buffer[0] = '\0'; | |
881 | wrap_column = 0; /* And disable fancy wrap */ | |
882 | } | |
883 | } | |
884 | } | |
885 | ||
886 | if (*lineptr == '\n') | |
887 | { | |
888 | chars_printed = 0; | |
d11c44f1 | 889 | wrap_here ((char *)0); /* Spit out chars, cancel further wraps */ |
bd5635a1 RP |
890 | lines_printed++; |
891 | putc ('\n', stream); | |
892 | lineptr++; | |
893 | } | |
894 | } | |
895 | } | |
896 | ||
897 | ||
898 | /* fputs_demangled is a variant of fputs_filtered that | |
899 | demangles g++ names.*/ | |
900 | ||
901 | void | |
902 | fputs_demangled (linebuffer, stream, arg_mode) | |
903 | char *linebuffer; | |
904 | FILE *stream; | |
905 | int arg_mode; | |
906 | { | |
907 | #ifdef __STDC__ | |
908 | extern char *cplus_demangle (const char *, int); | |
909 | #else | |
910 | extern char *cplus_demangle (); | |
911 | #endif | |
912 | #define SYMBOL_MAX 1024 | |
913 | ||
f88e7af8 JK |
914 | #define SYMBOL_CHAR(c) (isascii(c) \ |
915 | && (isalnum(c) || (c) == '_' || (c) == CPLUS_MARKER)) | |
bd5635a1 RP |
916 | |
917 | char buf[SYMBOL_MAX+1]; | |
918 | # define SLOP 5 /* How much room to leave in buf */ | |
919 | char *p; | |
920 | ||
921 | if (linebuffer == NULL) | |
922 | return; | |
923 | ||
924 | /* If user wants to see raw output, no problem. */ | |
925 | if (!demangle) { | |
926 | fputs_filtered (linebuffer, stream); | |
bdbd5f50 | 927 | return; |
bd5635a1 RP |
928 | } |
929 | ||
930 | p = linebuffer; | |
931 | ||
932 | while ( *p != (char) 0 ) { | |
933 | int i = 0; | |
934 | ||
935 | /* collect non-interesting characters into buf */ | |
936 | while ( *p != (char) 0 && !SYMBOL_CHAR(*p) && i < (int)sizeof(buf)-SLOP ) { | |
937 | buf[i++] = *p; | |
938 | p++; | |
939 | } | |
940 | if (i > 0) { | |
941 | /* output the non-interesting characters without demangling */ | |
942 | buf[i] = (char) 0; | |
943 | fputs_filtered(buf, stream); | |
944 | i = 0; /* reset buf */ | |
945 | } | |
946 | ||
947 | /* and now the interesting characters */ | |
948 | while (i < SYMBOL_MAX | |
949 | && *p != (char) 0 | |
950 | && SYMBOL_CHAR(*p) | |
951 | && i < (int)sizeof(buf) - SLOP) { | |
952 | buf[i++] = *p; | |
953 | p++; | |
954 | } | |
955 | buf[i] = (char) 0; | |
956 | if (i > 0) { | |
957 | char * result; | |
958 | ||
959 | if ( (result = cplus_demangle(buf, arg_mode)) != NULL ) { | |
960 | fputs_filtered(result, stream); | |
961 | free(result); | |
962 | } | |
963 | else { | |
964 | fputs_filtered(buf, stream); | |
965 | } | |
966 | } | |
967 | } | |
968 | } | |
969 | ||
970 | /* Print a variable number of ARGS using format FORMAT. If this | |
971 | information is going to put the amount written (since the last call | |
972 | to INITIALIZE_MORE_FILTER or the last page break) over the page size, | |
973 | print out a pause message and do a gdb_readline to get the users | |
974 | permision to continue. | |
975 | ||
976 | Unlike fprintf, this function does not return a value. | |
977 | ||
978 | We implement three variants, vfprintf (takes a vararg list and stream), | |
979 | fprintf (takes a stream to write on), and printf (the usual). | |
980 | ||
981 | Note that this routine has a restriction that the length of the | |
982 | final output line must be less than 255 characters *or* it must be | |
983 | less than twice the size of the format string. This is a very | |
984 | arbitrary restriction, but it is an internal restriction, so I'll | |
985 | put it in. This means that the %s format specifier is almost | |
986 | useless; unless the caller can GUARANTEE that the string is short | |
987 | enough, fputs_filtered should be used instead. | |
988 | ||
989 | Note also that a longjmp to top level may occur in this routine | |
990 | (since prompt_for_continue may do so) so this routine should not be | |
991 | called when cleanups are not in place. */ | |
992 | ||
993 | #if !defined(MISSING_VPRINTF) || defined (vsprintf) | |
994 | /* VARARGS */ | |
995 | void | |
996 | vfprintf_filtered (stream, format, args) | |
997 | va_list args; | |
998 | #else | |
999 | void fprintf_filtered (stream, format, arg1, arg2, arg3, arg4, arg5, arg6) | |
1000 | #endif | |
1001 | FILE *stream; | |
1002 | char *format; | |
1003 | { | |
1004 | static char *linebuffer = (char *) 0; | |
1005 | static int line_size; | |
1006 | int format_length; | |
1007 | ||
1008 | format_length = strlen (format); | |
1009 | ||
1010 | /* Allocated linebuffer for the first time. */ | |
1011 | if (!linebuffer) | |
1012 | { | |
1013 | linebuffer = (char *) xmalloc (255); | |
1014 | line_size = 255; | |
1015 | } | |
1016 | ||
1017 | /* Reallocate buffer to a larger size if this is necessary. */ | |
1018 | if (format_length * 2 > line_size) | |
1019 | { | |
1020 | line_size = format_length * 2; | |
1021 | ||
1022 | /* You don't have to copy. */ | |
1023 | free (linebuffer); | |
1024 | linebuffer = (char *) xmalloc (line_size); | |
1025 | } | |
1026 | ||
1027 | ||
1028 | /* This won't blow up if the restrictions described above are | |
1029 | followed. */ | |
1030 | #if !defined(MISSING_VPRINTF) || defined (vsprintf) | |
1031 | (void) vsprintf (linebuffer, format, args); | |
1032 | #else | |
1033 | (void) sprintf (linebuffer, format, arg1, arg2, arg3, arg4, arg5, arg6); | |
1034 | #endif | |
1035 | ||
1036 | fputs_filtered (linebuffer, stream); | |
1037 | } | |
1038 | ||
1039 | #if !defined(MISSING_VPRINTF) || defined (vsprintf) | |
1040 | /* VARARGS */ | |
1041 | void | |
1042 | fprintf_filtered (va_alist) | |
1043 | va_dcl | |
1044 | { | |
1045 | va_list args; | |
1046 | FILE *stream; | |
1047 | char *format; | |
1048 | ||
1049 | va_start (args); | |
1050 | stream = va_arg (args, FILE *); | |
1051 | format = va_arg (args, char *); | |
1052 | ||
1053 | /* This won't blow up if the restrictions described above are | |
1054 | followed. */ | |
1055 | (void) vfprintf_filtered (stream, format, args); | |
1056 | va_end (args); | |
1057 | } | |
1058 | ||
1059 | /* VARARGS */ | |
1060 | void | |
1061 | printf_filtered (va_alist) | |
1062 | va_dcl | |
1063 | { | |
1064 | va_list args; | |
1065 | char *format; | |
1066 | ||
1067 | va_start (args); | |
1068 | format = va_arg (args, char *); | |
1069 | ||
1070 | (void) vfprintf_filtered (stdout, format, args); | |
1071 | va_end (args); | |
1072 | } | |
1073 | #else | |
1074 | void | |
1075 | printf_filtered (format, arg1, arg2, arg3, arg4, arg5, arg6) | |
1076 | char *format; | |
1077 | int arg1, arg2, arg3, arg4, arg5, arg6; | |
1078 | { | |
1079 | fprintf_filtered (stdout, format, arg1, arg2, arg3, arg4, arg5, arg6); | |
1080 | } | |
1081 | #endif | |
1082 | ||
1083 | /* Easy */ | |
1084 | ||
1085 | void | |
1086 | puts_filtered (string) | |
1087 | char *string; | |
1088 | { | |
1089 | fputs_filtered (string, stdout); | |
1090 | } | |
1091 | ||
1092 | /* Return a pointer to N spaces and a null. The pointer is good | |
1093 | until the next call to here. */ | |
1094 | char * | |
1095 | n_spaces (n) | |
1096 | int n; | |
1097 | { | |
1098 | register char *t; | |
1099 | static char *spaces; | |
1100 | static int max_spaces; | |
1101 | ||
1102 | if (n > max_spaces) | |
1103 | { | |
1104 | if (spaces) | |
1105 | free (spaces); | |
1106 | spaces = malloc (n+1); | |
1107 | for (t = spaces+n; t != spaces;) | |
1108 | *--t = ' '; | |
1109 | spaces[n] = '\0'; | |
1110 | max_spaces = n; | |
1111 | } | |
1112 | ||
1113 | return spaces + max_spaces - n; | |
1114 | } | |
1115 | ||
1116 | /* Print N spaces. */ | |
1117 | void | |
1118 | print_spaces_filtered (n, stream) | |
1119 | int n; | |
1120 | FILE *stream; | |
1121 | { | |
1122 | fputs_filtered (n_spaces (n), stream); | |
1123 | } | |
1124 | \f | |
1125 | /* C++ demangler stuff. */ | |
1126 | char *cplus_demangle (); | |
1127 | ||
1128 | /* Print NAME on STREAM, demangling if necessary. */ | |
1129 | void | |
1130 | fprint_symbol (stream, name) | |
1131 | FILE *stream; | |
1132 | char *name; | |
1133 | { | |
1134 | char *demangled; | |
1135 | if ((!demangle) || NULL == (demangled = cplus_demangle (name, 1))) | |
1136 | fputs_filtered (name, stream); | |
1137 | else | |
1138 | { | |
1139 | fputs_filtered (demangled, stream); | |
1140 | free (demangled); | |
1141 | } | |
1142 | } | |
1143 | \f | |
1144 | #if !defined (USG_UTILS) | |
1145 | #define USG_UTILS defined (USG) | |
1146 | #endif | |
1147 | ||
1148 | #if USG_UTILS | |
1149 | bcopy (from, to, count) | |
1150 | char *from, *to; | |
1151 | { | |
1152 | memcpy (to, from, count); | |
1153 | } | |
1154 | ||
1155 | bcmp (from, to, count) | |
1156 | { | |
1157 | return (memcmp (to, from, count)); | |
1158 | } | |
1159 | ||
1160 | bzero (to, count) | |
1161 | char *to; | |
1162 | { | |
1163 | while (count--) | |
1164 | *to++ = 0; | |
1165 | } | |
1166 | ||
1167 | getwd (buf) | |
1168 | char *buf; | |
1169 | { | |
1170 | getcwd (buf, MAXPATHLEN); | |
1171 | } | |
1172 | ||
1173 | char * | |
1174 | index (s, c) | |
1175 | char *s; | |
1176 | { | |
1177 | char *strchr (); | |
1178 | return strchr (s, c); | |
1179 | } | |
1180 | ||
1181 | char * | |
1182 | rindex (s, c) | |
1183 | char *s; | |
1184 | { | |
1185 | char *strrchr (); | |
1186 | return strrchr (s, c); | |
1187 | } | |
1188 | #endif /* USG_UTILS. */ | |
1189 | ||
1190 | #if !defined (QUEUE_MISSING) | |
1191 | #define QUEUE_MISSING defined (USG) | |
1192 | #endif | |
1193 | ||
1194 | #if QUEUE_MISSING | |
1195 | /* Queue routines */ | |
1196 | ||
1197 | struct queue { | |
1198 | struct queue *forw; | |
1199 | struct queue *back; | |
1200 | }; | |
1201 | ||
1202 | insque (item, after) | |
1203 | struct queue *item; | |
1204 | struct queue *after; | |
1205 | { | |
1206 | item->forw = after->forw; | |
1207 | after->forw->back = item; | |
1208 | ||
1209 | item->back = after; | |
1210 | after->forw = item; | |
1211 | } | |
1212 | ||
1213 | remque (item) | |
1214 | struct queue *item; | |
1215 | { | |
1216 | item->forw->back = item->back; | |
1217 | item->back->forw = item->forw; | |
1218 | } | |
1219 | #endif /* QUEUE_MISSING */ | |
1220 | \f | |
bdbd5f50 | 1221 | #ifndef HAVE_STRSTR |
bd5635a1 | 1222 | /* Simple implementation of strstr, since some implementations lack it. */ |
bdbd5f50 | 1223 | const char * |
bd5635a1 RP |
1224 | strstr (in, find) |
1225 | const char *in, *find; | |
1226 | { | |
e1ce8aa5 | 1227 | register const char *p = in - 1; |
bd5635a1 RP |
1228 | |
1229 | while (0 != (p = strchr (p+1, *find))) { | |
1230 | if (strcmp (p, find)) | |
bdbd5f50 | 1231 | return p; |
bd5635a1 RP |
1232 | } |
1233 | return 0; | |
1234 | } | |
bdbd5f50 | 1235 | #endif /* do not HAVE_STRSTR */ |
bd5635a1 RP |
1236 | \f |
1237 | void | |
1238 | _initialize_utils () | |
1239 | { | |
1240 | struct cmd_list_element *c; | |
1241 | ||
1242 | c = add_set_cmd ("width", class_support, var_uinteger, | |
1243 | (char *)&chars_per_line, | |
1244 | "Set number of characters gdb thinks are in a line.", | |
1245 | &setlist); | |
1246 | add_show_from_set (c, &showlist); | |
1247 | c->function = set_width_command; | |
1248 | ||
1249 | add_show_from_set | |
1250 | (add_set_cmd ("height", class_support, | |
1251 | var_uinteger, (char *)&lines_per_page, | |
1252 | "Set number of lines gdb thinks are in a page.", &setlist), | |
1253 | &showlist); | |
1254 | ||
1255 | /* These defaults will be used if we are unable to get the correct | |
1256 | values from termcap. */ | |
1257 | lines_per_page = 24; | |
1258 | chars_per_line = 80; | |
1259 | /* Initialize the screen height and width from termcap. */ | |
1260 | { | |
1261 | char *termtype = getenv ("TERM"); | |
1262 | ||
1263 | /* Positive means success, nonpositive means failure. */ | |
1264 | int status; | |
1265 | ||
1266 | /* 2048 is large enough for all known terminals, according to the | |
1267 | GNU termcap manual. */ | |
1268 | char term_buffer[2048]; | |
1269 | ||
1270 | if (termtype) | |
1271 | { | |
1272 | status = tgetent (term_buffer, termtype); | |
1273 | if (status > 0) | |
1274 | { | |
1275 | int val; | |
1276 | ||
1277 | val = tgetnum ("li"); | |
1278 | if (val >= 0) | |
1279 | lines_per_page = val; | |
1280 | else | |
1281 | /* The number of lines per page is not mentioned | |
1282 | in the terminal description. This probably means | |
1283 | that paging is not useful (e.g. emacs shell window), | |
1284 | so disable paging. */ | |
1285 | lines_per_page = UINT_MAX; | |
1286 | ||
1287 | val = tgetnum ("co"); | |
1288 | if (val >= 0) | |
1289 | chars_per_line = val; | |
1290 | } | |
1291 | } | |
1292 | } | |
1293 | ||
1294 | set_width_command ((char *)NULL, 0, c); | |
1295 | ||
1296 | add_show_from_set | |
1297 | (add_set_cmd ("demangle", class_support, var_boolean, | |
1298 | (char *)&demangle, | |
1299 | "Set demangling of encoded C++ names when displaying symbols.", | |
f266e564 JK |
1300 | &setprintlist), |
1301 | &showprintlist); | |
bd5635a1 RP |
1302 | |
1303 | add_show_from_set | |
1304 | (add_set_cmd ("sevenbit-strings", class_support, var_boolean, | |
1305 | (char *)&sevenbit_strings, | |
1306 | "Set printing of 8-bit characters in strings as \\nnn.", | |
f266e564 JK |
1307 | &setprintlist), |
1308 | &showprintlist); | |
bd5635a1 RP |
1309 | |
1310 | add_show_from_set | |
1311 | (add_set_cmd ("asm-demangle", class_support, var_boolean, | |
1312 | (char *)&asm_demangle, | |
1313 | "Set demangling of C++ names in disassembly listings.", | |
f266e564 JK |
1314 | &setprintlist), |
1315 | &showprintlist); | |
bd5635a1 | 1316 | } |