1 /* General utility routines for GDB, the GNU debugger.
2 Copyright 1986, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
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.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #include <sys/ioctl.h>
23 #include <sys/param.h>
35 /* Prototypes for local functions */
37 #if !defined (NO_MALLOC_CHECK)
40 malloc_botch
PARAMS ((void));
42 #endif /* NO_MALLOC_CHECK */
45 fatal_dump_core (); /* Can't prototype with <varargs.h> usage... */
48 prompt_for_continue
PARAMS ((void));
51 set_width_command
PARAMS ((char *, int, struct cmd_list_element
*));
54 vfprintf_filtered
PARAMS ((FILE *, char *, va_list));
56 /* If this definition isn't overridden by the header files, assume
57 that isatty and fileno exist on this system. */
59 #define ISATTY(FP) (isatty (fileno (FP)))
62 /* Chain of cleanup actions established with make_cleanup,
63 to be executed if an error happens. */
65 static struct cleanup
*cleanup_chain
;
67 /* Nonzero means a quit has been requested. */
71 /* Nonzero means quit immediately if Control-C is typed now,
72 rather than waiting until QUIT is executed. */
76 /* Nonzero means that encoded C++ names should be printed out in their
77 C++ form rather than raw. */
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. */
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.) */
91 int sevenbit_strings
= 0;
93 /* String to be printed before error messages, if any. */
95 char *error_pre_print
;
96 char *warning_pre_print
= "\nwarning: ";
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. */
104 make_cleanup (function
, arg
)
105 void (*function
) PARAMS ((PTR
));
108 register struct cleanup
*new
109 = (struct cleanup
*) xmalloc (sizeof (struct cleanup
));
110 register struct cleanup
*old_chain
= cleanup_chain
;
112 new->next
= cleanup_chain
;
113 new->function
= function
;
120 /* Discard cleanups and do the actions they describe
121 until we get back to the point OLD_CHAIN in the cleanup_chain. */
124 do_cleanups (old_chain
)
125 register struct cleanup
*old_chain
;
127 register struct cleanup
*ptr
;
128 while ((ptr
= cleanup_chain
) != old_chain
)
130 cleanup_chain
= ptr
->next
; /* Do this first incase recursion */
131 (*ptr
->function
) (ptr
->arg
);
136 /* Discard cleanups, not doing the actions they describe,
137 until we get back to the point OLD_CHAIN in the cleanup_chain. */
140 discard_cleanups (old_chain
)
141 register struct cleanup
*old_chain
;
143 register struct cleanup
*ptr
;
144 while ((ptr
= cleanup_chain
) != old_chain
)
146 cleanup_chain
= ptr
->next
;
151 /* Set the cleanup_chain to 0, and return the old cleanup chain. */
155 struct cleanup
*old_chain
= cleanup_chain
;
161 /* Restore the cleanup chain from a previously saved chain. */
163 restore_cleanups (chain
)
164 struct cleanup
*chain
;
166 cleanup_chain
= chain
;
169 /* This function is useful for cleanups.
173 old_chain = make_cleanup (free_current_contents, &foo);
175 to arrange to free the object thus allocated. */
178 free_current_contents (location
)
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. */
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. */
206 target_terminal_ours ();
207 wrap_here(""); /* Force out any buffered output */
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. */
226 target_terminal_ours ();
227 wrap_here(""); /* Force out any buffered output */
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");
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. */
250 target_terminal_ours ();
251 wrap_here(""); /* Force out any buffered output */
254 fprintf (stderr
, error_pre_print
);
255 string
= va_arg (args
, char *);
256 vfprintf (stderr
, string
, args
);
257 fprintf (stderr
, "\n");
259 return_to_top_level ();
262 /* Print an error message and exit reporting failure.
263 This is for a error that we cannot continue from.
264 The arguments are printed a la printf.
266 This function cannot be declared volatile (NORETURN) in an
267 ANSI environment because exit() is not declared volatile. */
278 string
= va_arg (args
, char *);
279 fprintf (stderr
, "\ngdb: ");
280 vfprintf (stderr
, string
, args
);
281 fprintf (stderr
, "\n");
286 /* Print an error message and exit, dumping core.
287 The arguments are printed a la printf (). */
291 fatal_dump_core (va_alist
)
298 string
= va_arg (args
, char *);
299 /* "internal error" is always correct, since GDB should never dump
300 core, no matter what the input. */
301 fprintf (stderr
, "\ngdb internal error: ");
302 vfprintf (stderr
, string
, args
);
303 fprintf (stderr
, "\n");
306 signal (SIGQUIT
, SIG_DFL
);
307 kill (getpid (), SIGQUIT
);
308 /* We should never get here, but just in case... */
312 /* The strerror() function can return NULL for errno values that are
313 out of range. Provide a "safe" version that always returns a
317 safe_strerror (errnum
)
323 if ((msg
= strerror (errnum
)) == NULL
)
325 sprintf (buf
, "(undocumented errno %d)", errnum
);
331 /* The strsignal() function can return NULL for signal values that are
332 out of range. Provide a "safe" version that always returns a
336 safe_strsignal (signo
)
342 if ((msg
= strsignal (signo
)) == NULL
)
344 sprintf (buf
, "(undocumented signal %d)", signo
);
351 /* Print the system error message for errno, and also mention STRING
352 as the file name for which the error was encountered.
353 Then return to command level. */
356 perror_with_name (string
)
362 err
= safe_strerror (errno
);
363 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
364 strcpy (combined
, string
);
365 strcat (combined
, ": ");
366 strcat (combined
, err
);
368 /* I understand setting these is a matter of taste. Still, some people
369 may clear errno but not know about bfd_error. Doing this here is not
371 bfd_error
= no_error
;
374 error ("%s.", combined
);
377 /* Print the system error message for ERRCODE, and also mention STRING
378 as the file name for which the error was encountered. */
381 print_sys_errmsg (string
, errcode
)
388 err
= safe_strerror (errcode
);
389 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
390 strcpy (combined
, string
);
391 strcat (combined
, ": ");
392 strcat (combined
, err
);
394 printf ("%s.\n", combined
);
397 /* Control C eventually causes this to be called, at a convenient time. */
402 target_terminal_ours ();
403 wrap_here ((char *)0); /* Force out any pending output */
405 ioctl (fileno (stdout
), TCFLSH
, 1);
406 #else /* not HAVE_TERMIO */
407 ioctl (fileno (stdout
), TIOCFLUSH
, 0);
408 #endif /* not HAVE_TERMIO */
412 error ("Quit (expect signal %d when inferior is resumed)", SIGINT
);
413 #endif /* TIOCGPGRP */
416 /* Control C comes here */
425 /* Restore the signal handler. */
426 signal (signo
, request_quit
);
434 /* Memory management stuff (malloc friends). */
436 #if defined (NO_MMALLOC)
443 return (malloc (size
));
447 mrealloc (md
, ptr
, size
)
452 if (ptr
== 0) /* Guard against old realloc's */
453 return malloc (size
);
455 return realloc (ptr
, size
);
466 #endif /* NO_MMALLOC */
468 #if defined (NO_MMALLOC) || defined (NO_MMALLOC_CHECK)
476 #else /* have mmalloc and want corruption checking */
481 fatal_dump_core ("Memory corruption");
484 /* Attempt to install hooks in mmalloc/mrealloc/mfree for the heap specified
485 by MD, to detect memory corruption. Note that MD may be NULL to specify
486 the default heap that grows via sbrk.
488 Note that for freshly created regions, we must call mmcheck prior to any
489 mallocs in the region. Otherwise, any region which was allocated prior to
490 installing the checking hooks, which is later reallocated or freed, will
491 fail the checks! The mmcheck function only allows initial hooks to be
492 installed before the first mmalloc. However, anytime after we have called
493 mmcheck the first time to install the checking hooks, we can call it again
494 to update the function pointer to the memory corruption handler.
496 Returns zero on failure, non-zero on success. */
502 if (!mmcheck (md
, malloc_botch
))
504 warning ("internal error: failed to install memory consistency checks");
510 #endif /* Have mmalloc and want corruption checking */
512 /* Called when a memory allocation fails, with the number of bytes of
513 memory requested in SIZE. */
521 fatal ("virtual memory exhausted: can't allocate %ld bytes.", size
);
525 fatal ("virtual memory exhausted.");
529 /* Like mmalloc but get error if no storage available, and protect against
530 the caller wanting to allocate zero bytes. Whether to return NULL for
531 a zero byte request, or translate the request into a request for one
532 byte of zero'd storage, is a religious issue. */
545 else if ((val
= mmalloc (md
, size
)) == NULL
)
552 /* Like mrealloc but get error if no storage available. */
555 xmrealloc (md
, ptr
, size
)
564 val
= mrealloc (md
, ptr
, size
);
568 val
= mmalloc (md
, size
);
577 /* Like malloc but get error if no storage available, and protect against
578 the caller wanting to allocate zero bytes. */
584 return (xmmalloc ((void *) NULL
, size
));
587 /* Like mrealloc but get error if no storage available. */
594 return (xmrealloc ((void *) NULL
, ptr
, size
));
598 /* My replacement for the read system call.
599 Used like `read' but keeps going if `read' returns too soon. */
602 myread (desc
, addr
, len
)
612 val
= read (desc
, addr
, len
);
623 /* Make a copy of the string at PTR with SIZE characters
624 (and add a null character at the end in the copy).
625 Uses malloc to get the space. Returns the address of the copy. */
628 savestring (ptr
, size
)
632 register char *p
= (char *) xmalloc (size
+ 1);
633 bcopy (ptr
, p
, size
);
639 msavestring (md
, ptr
, size
)
644 register char *p
= (char *) xmmalloc (md
, size
+ 1);
645 bcopy (ptr
, p
, size
);
650 /* The "const" is so it compiles under DGUX (which prototypes strsave
651 in <string.h>. FIXME: This should be named "xstrsave", shouldn't it?
652 Doesn't real strsave return NULL if out of memory? */
657 return savestring (ptr
, strlen (ptr
));
665 return (msavestring (md
, ptr
, strlen (ptr
)));
669 print_spaces (n
, file
)
677 /* Ask user a y-or-n question and return 1 iff answer is yes.
678 Takes three args which are given to printf to print the question.
679 The first, a control string, should end in "? ".
680 It should not say how to answer, because we do that. */
692 /* Automatically answer "yes" if input is not from a terminal. */
693 if (!input_from_terminal_p ())
699 ctlstr
= va_arg (args
, char *);
700 vfprintf (stdout
, ctlstr
, args
);
702 printf ("(y or n) ");
704 answer
= fgetc (stdin
);
705 clearerr (stdin
); /* in case of C-d */
706 if (answer
== EOF
) /* C-d */
708 if (answer
!= '\n') /* Eat rest of input line, to EOF or newline */
711 ans2
= fgetc (stdin
);
714 while (ans2
!= EOF
&& ans2
!= '\n');
721 printf ("Please answer y or n.\n");
726 /* Parse a C escape sequence. STRING_PTR points to a variable
727 containing a pointer to the string to parse. That pointer
728 should point to the character after the \. That pointer
729 is updated past the characters we use. The value of the
730 escape sequence is returned.
732 A negative value means the sequence \ newline was seen,
733 which is supposed to be equivalent to nothing at all.
735 If \ is followed by a null character, we return a negative
736 value and leave the string pointer pointing at the null character.
738 If \ is followed by 000, we return 0 and leave the string pointer
739 after the zeros. A value of 0 does not mean end of string. */
742 parse_escape (string_ptr
)
745 register int c
= *(*string_ptr
)++;
749 return 007; /* Bell (alert) char */
752 case 'e': /* Escape character */
770 c
= *(*string_ptr
)++;
772 c
= parse_escape (string_ptr
);
775 return (c
& 0200) | (c
& 037);
786 register int i
= c
- '0';
787 register int count
= 0;
790 if ((c
= *(*string_ptr
)++) >= '0' && c
<= '7')
808 /* Print the character C on STREAM as part of the contents
809 of a literal string whose delimiter is QUOTER. */
812 printchar (c
, stream
, quoter
)
818 if (c
< 040 || (sevenbit_strings
&& c
>= 0177)) {
822 fputs_filtered ("\\n", stream
);
825 fputs_filtered ("\\b", stream
);
828 fputs_filtered ("\\t", stream
);
831 fputs_filtered ("\\f", stream
);
834 fputs_filtered ("\\r", stream
);
837 fputs_filtered ("\\e", stream
);
840 fputs_filtered ("\\a", stream
);
843 fprintf_filtered (stream
, "\\%.3o", (unsigned int) c
);
847 if (c
== '\\' || c
== quoter
)
848 fputs_filtered ("\\", stream
);
849 fprintf_filtered (stream
, "%c", c
);
853 /* Number of lines per page or UINT_MAX if paging is disabled. */
854 static unsigned int lines_per_page
;
855 /* Number of chars per line or UNIT_MAX is line folding is disabled. */
856 static unsigned int chars_per_line
;
857 /* Current count of lines printed on this page, chars on this line. */
858 static unsigned int lines_printed
, chars_printed
;
860 /* Buffer and start column of buffered text, for doing smarter word-
861 wrapping. When someone calls wrap_here(), we start buffering output
862 that comes through fputs_filtered(). If we see a newline, we just
863 spit it out and forget about the wrap_here(). If we see another
864 wrap_here(), we spit it out and remember the newer one. If we see
865 the end of the line, we spit out a newline, the indent, and then
868 wrap_column is the column number on the screen where wrap_buffer begins.
869 When wrap_column is zero, wrapping is not in effect.
870 wrap_buffer is malloc'd with chars_per_line+2 bytes.
871 When wrap_buffer[0] is null, the buffer is empty.
872 wrap_pointer points into it at the next character to fill.
873 wrap_indent is the string that should be used as indentation if the
876 static char *wrap_buffer
, *wrap_pointer
, *wrap_indent
;
877 static int wrap_column
;
881 set_width_command (args
, from_tty
, c
)
884 struct cmd_list_element
*c
;
888 wrap_buffer
= (char *) xmalloc (chars_per_line
+ 2);
889 wrap_buffer
[0] = '\0';
892 wrap_buffer
= (char *) xrealloc (wrap_buffer
, chars_per_line
+ 2);
893 wrap_pointer
= wrap_buffer
; /* Start it at the beginning */
897 prompt_for_continue ()
902 ignore
= gdb_readline ("---Type <return> to continue---");
905 chars_printed
= lines_printed
= 0;
907 dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
910 /* Reinitialize filter; ie. tell it to reset to original values. */
913 reinitialize_more_filter ()
919 /* Indicate that if the next sequence of characters overflows the line,
920 a newline should be inserted here rather than when it hits the end.
921 If INDENT is nonzero, it is a string to be printed to indent the
922 wrapped part on the next line. INDENT must remain accessible until
923 the next call to wrap_here() or until a newline is printed through
926 If the line is already overfull, we immediately print a newline and
927 the indentation, and disable further wrapping.
929 If we don't know the width of lines, but we know the page height,
930 we must not wrap words, but should still keep track of newlines
931 that were explicitly printed.
933 INDENT should not contain tabs, as that
934 will mess up the char count on the next line. FIXME. */
942 *wrap_pointer
= '\0';
943 fputs (wrap_buffer
, stdout
);
945 wrap_pointer
= wrap_buffer
;
946 wrap_buffer
[0] = '\0';
947 if (chars_per_line
== UINT_MAX
) /* No line overflow checking */
951 else if (chars_printed
>= chars_per_line
)
953 puts_filtered ("\n");
954 puts_filtered (indent
);
959 wrap_column
= chars_printed
;
960 wrap_indent
= indent
;
964 /* Like fputs but pause after every screenful, and can wrap at points
965 other than the final character of a line.
966 Unlike fputs, fputs_filtered does not return a value.
967 It is OK for LINEBUFFER to be NULL, in which case just don't print
970 Note that a longjmp to top level may occur in this routine
971 (since prompt_for_continue may do so) so this routine should not be
972 called when cleanups are not in place. */
975 fputs_filtered (linebuffer
, stream
)
976 const char *linebuffer
;
984 /* Don't do any filtering if it is disabled. */
986 || (lines_per_page
== UINT_MAX
&& chars_per_line
== UINT_MAX
))
988 fputs (linebuffer
, stream
);
992 /* Go through and output each character. Show line extension
993 when this is necessary; prompt user for new page when this is
996 lineptr
= linebuffer
;
999 /* Possible new page. */
1000 if (lines_printed
>= lines_per_page
- 1)
1001 prompt_for_continue ();
1003 while (*lineptr
&& *lineptr
!= '\n')
1005 /* Print a single line. */
1006 if (*lineptr
== '\t')
1009 *wrap_pointer
++ = '\t';
1011 putc ('\t', stream
);
1012 /* Shifting right by 3 produces the number of tab stops
1013 we have already passed, and then adding one and
1014 shifting left 3 advances to the next tab stop. */
1015 chars_printed
= ((chars_printed
>> 3) + 1) << 3;
1021 *wrap_pointer
++ = *lineptr
;
1023 putc (*lineptr
, stream
);
1028 if (chars_printed
>= chars_per_line
)
1030 unsigned int save_chars
= chars_printed
;
1034 /* If we aren't actually wrapping, don't output newline --
1035 if chars_per_line is right, we probably just overflowed
1036 anyway; if it's wrong, let us keep going. */
1038 putc ('\n', stream
);
1040 /* Possible new page. */
1041 if (lines_printed
>= lines_per_page
- 1)
1042 prompt_for_continue ();
1044 /* Now output indentation and wrapped string */
1048 fputs (wrap_indent
, stream
);
1049 *wrap_pointer
= '\0'; /* Null-terminate saved stuff */
1050 fputs (wrap_buffer
, stream
); /* and eject it */
1051 /* FIXME, this strlen is what prevents wrap_indent from
1052 containing tabs. However, if we recurse to print it
1053 and count its chars, we risk trouble if wrap_indent is
1054 longer than (the user settable) chars_per_line.
1055 Note also that this can set chars_printed > chars_per_line
1056 if we are printing a long string. */
1057 chars_printed
= strlen (wrap_indent
)
1058 + (save_chars
- wrap_column
);
1059 wrap_pointer
= wrap_buffer
; /* Reset buffer */
1060 wrap_buffer
[0] = '\0';
1061 wrap_column
= 0; /* And disable fancy wrap */
1066 if (*lineptr
== '\n')
1069 wrap_here ((char *)0); /* Spit out chars, cancel further wraps */
1071 putc ('\n', stream
);
1078 /* fputs_demangled is a variant of fputs_filtered that
1079 demangles g++ names.*/
1082 fputs_demangled (linebuffer
, stream
, arg_mode
)
1087 #define SYMBOL_MAX 1024
1089 #define SYMBOL_CHAR(c) (isascii(c) \
1090 && (isalnum(c) || (c) == '_' || (c) == CPLUS_MARKER))
1092 char buf
[SYMBOL_MAX
+1];
1093 # define SLOP 5 /* How much room to leave in buf */
1096 if (linebuffer
== NULL
)
1099 /* If user wants to see raw output, no problem. */
1101 fputs_filtered (linebuffer
, stream
);
1107 while ( *p
!= (char) 0 ) {
1110 /* collect non-interesting characters into buf */
1111 while ( *p
!= (char) 0 && !SYMBOL_CHAR(*p
) && i
< (int)sizeof(buf
)-SLOP
) {
1116 /* output the non-interesting characters without demangling */
1118 fputs_filtered(buf
, stream
);
1119 i
= 0; /* reset buf */
1122 /* and now the interesting characters */
1123 while (i
< SYMBOL_MAX
1126 && i
< (int)sizeof(buf
) - SLOP
) {
1134 if ( (result
= cplus_demangle(buf
, arg_mode
)) != NULL
) {
1135 fputs_filtered(result
, stream
);
1139 fputs_filtered(buf
, stream
);
1145 /* Print a variable number of ARGS using format FORMAT. If this
1146 information is going to put the amount written (since the last call
1147 to INITIALIZE_MORE_FILTER or the last page break) over the page size,
1148 print out a pause message and do a gdb_readline to get the users
1149 permision to continue.
1151 Unlike fprintf, this function does not return a value.
1153 We implement three variants, vfprintf (takes a vararg list and stream),
1154 fprintf (takes a stream to write on), and printf (the usual).
1156 Note that this routine has a restriction that the length of the
1157 final output line must be less than 255 characters *or* it must be
1158 less than twice the size of the format string. This is a very
1159 arbitrary restriction, but it is an internal restriction, so I'll
1160 put it in. This means that the %s format specifier is almost
1161 useless; unless the caller can GUARANTEE that the string is short
1162 enough, fputs_filtered should be used instead.
1164 Note also that a longjmp to top level may occur in this routine
1165 (since prompt_for_continue may do so) so this routine should not be
1166 called when cleanups are not in place. */
1169 vfprintf_filtered (stream
, format
, args
)
1174 static char *linebuffer
= (char *) 0;
1175 static int line_size
;
1178 format_length
= strlen (format
);
1180 /* Allocated linebuffer for the first time. */
1183 linebuffer
= (char *) xmalloc (255);
1187 /* Reallocate buffer to a larger size if this is necessary. */
1188 if (format_length
* 2 > line_size
)
1190 line_size
= format_length
* 2;
1192 /* You don't have to copy. */
1194 linebuffer
= (char *) xmalloc (line_size
);
1198 /* This won't blow up if the restrictions described above are
1200 (void) vsprintf (linebuffer
, format
, args
);
1202 fputs_filtered (linebuffer
, stream
);
1207 fprintf_filtered (va_alist
)
1215 stream
= va_arg (args
, FILE *);
1216 format
= va_arg (args
, char *);
1218 /* This won't blow up if the restrictions described above are
1220 vfprintf_filtered (stream
, format
, args
);
1226 printf_filtered (va_alist
)
1233 format
= va_arg (args
, char *);
1235 vfprintf_filtered (stdout
, format
, args
);
1242 puts_filtered (string
)
1245 fputs_filtered (string
, stdout
);
1248 /* Return a pointer to N spaces and a null. The pointer is good
1249 until the next call to here. */
1255 static char *spaces
;
1256 static int max_spaces
;
1262 spaces
= (char *) xmalloc (n
+1);
1263 for (t
= spaces
+n
; t
!= spaces
;)
1269 return spaces
+ max_spaces
- n
;
1272 /* Print N spaces. */
1274 print_spaces_filtered (n
, stream
)
1278 fputs_filtered (n_spaces (n
), stream
);
1281 /* C++ demangler stuff. */
1283 /* Print NAME on STREAM, demangling if necessary. */
1285 fprint_symbol (stream
, name
)
1290 if ((!demangle
) || NULL
== (demangled
= cplus_demangle (name
, 1)))
1291 fputs_filtered (name
, stream
);
1294 fputs_filtered (demangled
, stream
);
1300 _initialize_utils ()
1302 struct cmd_list_element
*c
;
1304 c
= add_set_cmd ("width", class_support
, var_uinteger
,
1305 (char *)&chars_per_line
,
1306 "Set number of characters gdb thinks are in a line.",
1308 add_show_from_set (c
, &showlist
);
1309 c
->function
.sfunc
= set_width_command
;
1312 (add_set_cmd ("height", class_support
,
1313 var_uinteger
, (char *)&lines_per_page
,
1314 "Set number of lines gdb thinks are in a page.", &setlist
),
1317 /* These defaults will be used if we are unable to get the correct
1318 values from termcap. */
1319 lines_per_page
= 24;
1320 chars_per_line
= 80;
1321 /* Initialize the screen height and width from termcap. */
1323 char *termtype
= getenv ("TERM");
1325 /* Positive means success, nonpositive means failure. */
1328 /* 2048 is large enough for all known terminals, according to the
1329 GNU termcap manual. */
1330 char term_buffer
[2048];
1334 status
= tgetent (term_buffer
, termtype
);
1339 val
= tgetnum ("li");
1341 lines_per_page
= val
;
1343 /* The number of lines per page is not mentioned
1344 in the terminal description. This probably means
1345 that paging is not useful (e.g. emacs shell window),
1346 so disable paging. */
1347 lines_per_page
= UINT_MAX
;
1349 val
= tgetnum ("co");
1351 chars_per_line
= val
;
1356 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1358 /* If there is a better way to determine the window size, use it. */
1359 SIGWINCH_HANDLER ();
1362 /* If the output is not a terminal, don't paginate it. */
1363 if (!ISATTY (stdout
))
1364 lines_per_page
= UINT_MAX
;
1366 set_width_command ((char *)NULL
, 0, c
);
1369 (add_set_cmd ("demangle", class_support
, var_boolean
,
1371 "Set demangling of encoded C++ names when displaying symbols.",
1376 (add_set_cmd ("sevenbit-strings", class_support
, var_boolean
,
1377 (char *)&sevenbit_strings
,
1378 "Set printing of 8-bit characters in strings as \\nnn.",
1383 (add_set_cmd ("asm-demangle", class_support
, var_boolean
,
1384 (char *)&asm_demangle
,
1385 "Set demangling of C++ names in disassembly listings.",
1390 /* Machine specific function to handle SIGWINCH signal. */
1392 #ifdef SIGWINCH_HANDLER_BODY
1393 SIGWINCH_HANDLER_BODY
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