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. */
21 #if !defined(__GO32__)
22 #include <sys/ioctl.h>
23 #include <sys/param.h>
37 /* Prototypes for local functions */
39 #if !defined (NO_MALLOC_CHECK)
42 malloc_botch
PARAMS ((void));
44 #endif /* NO_MALLOC_CHECK */
47 fatal_dump_core (); /* Can't prototype with <varargs.h> usage... */
50 prompt_for_continue
PARAMS ((void));
53 set_width_command
PARAMS ((char *, int, struct cmd_list_element
*));
56 vfprintf_filtered
PARAMS ((FILE *, char *, va_list));
58 /* If this definition isn't overridden by the header files, assume
59 that isatty and fileno exist on this system. */
61 #define ISATTY(FP) (isatty (fileno (FP)))
64 /* Chain of cleanup actions established with make_cleanup,
65 to be executed if an error happens. */
67 static struct cleanup
*cleanup_chain
;
69 /* Nonzero means a quit has been requested. */
73 /* Nonzero means quit immediately if Control-C is typed now,
74 rather than waiting until QUIT is executed. */
78 /* Nonzero means that encoded C++ names should be printed out in their
79 C++ form rather than raw. */
83 /* Nonzero means that encoded C++ names should be printed out in their
84 C++ form even in assembler language displays. If this is set, but
85 DEMANGLE is zero, names are printed raw, i.e. DEMANGLE controls. */
89 /* Nonzero means that strings with character values >0x7F should be printed
90 as octal escapes. Zero means just print the value (e.g. it's an
91 international character, and the terminal or window can cope.) */
93 int sevenbit_strings
= 0;
95 /* String to be printed before error messages, if any. */
97 char *error_pre_print
;
98 char *warning_pre_print
= "\nwarning: ";
100 /* Add a new cleanup to the cleanup_chain,
101 and return the previous chain pointer
102 to be passed later to do_cleanups or discard_cleanups.
103 Args are FUNCTION to clean up with, and ARG to pass to it. */
106 make_cleanup (function
, arg
)
107 void (*function
) PARAMS ((PTR
));
110 register struct cleanup
*new
111 = (struct cleanup
*) xmalloc (sizeof (struct cleanup
));
112 register struct cleanup
*old_chain
= cleanup_chain
;
114 new->next
= cleanup_chain
;
115 new->function
= function
;
122 /* Discard cleanups and do the actions they describe
123 until we get back to the point OLD_CHAIN in the cleanup_chain. */
126 do_cleanups (old_chain
)
127 register struct cleanup
*old_chain
;
129 register struct cleanup
*ptr
;
130 while ((ptr
= cleanup_chain
) != old_chain
)
132 cleanup_chain
= ptr
->next
; /* Do this first incase recursion */
133 (*ptr
->function
) (ptr
->arg
);
138 /* Discard cleanups, not doing the actions they describe,
139 until we get back to the point OLD_CHAIN in the cleanup_chain. */
142 discard_cleanups (old_chain
)
143 register struct cleanup
*old_chain
;
145 register struct cleanup
*ptr
;
146 while ((ptr
= cleanup_chain
) != old_chain
)
148 cleanup_chain
= ptr
->next
;
153 /* Set the cleanup_chain to 0, and return the old cleanup chain. */
157 struct cleanup
*old_chain
= cleanup_chain
;
163 /* Restore the cleanup chain from a previously saved chain. */
165 restore_cleanups (chain
)
166 struct cleanup
*chain
;
168 cleanup_chain
= chain
;
171 /* This function is useful for cleanups.
175 old_chain = make_cleanup (free_current_contents, &foo);
177 to arrange to free the object thus allocated. */
180 free_current_contents (location
)
186 /* Provide a known function that does nothing, to use as a base for
187 for a possibly long chain of cleanups. This is useful where we
188 use the cleanup chain for handling normal cleanups as well as dealing
189 with cleanups that need to be done as a result of a call to error().
190 In such cases, we may not be certain where the first cleanup is, unless
191 we have a do-nothing one to always use as the base. */
201 /* Provide a hook for modules wishing to print their own warning messages
202 to set up the terminal state in a compatible way, without them having
203 to import all the target_<...> macros. */
208 target_terminal_ours ();
209 wrap_here(""); /* Force out any buffered output */
213 /* Print a warning message.
214 The first argument STRING is the warning message, used as a fprintf string,
215 and the remaining args are passed as arguments to it.
216 The primary difference between warnings and errors is that a warning
217 does not force the return to command level. */
228 target_terminal_ours ();
229 wrap_here(""); /* Force out any buffered output */
231 if (warning_pre_print
)
232 fprintf (stderr
, warning_pre_print
);
233 string
= va_arg (args
, char *);
234 vfprintf (stderr
, string
, args
);
235 fprintf (stderr
, "\n");
239 /* Print an error message and return to command level.
240 The first argument STRING is the error message, used as a fprintf string,
241 and the remaining args are passed as arguments to it. */
252 target_terminal_ours ();
253 wrap_here(""); /* Force out any buffered output */
256 fprintf_filtered (stderr
, error_pre_print
);
257 string
= va_arg (args
, char *);
258 vfprintf_filtered (stderr
, string
, args
);
259 fprintf_filtered (stderr
, "\n");
261 return_to_top_level ();
264 /* Print an error message and exit reporting failure.
265 This is for a error that we cannot continue from.
266 The arguments are printed a la printf.
268 This function cannot be declared volatile (NORETURN) in an
269 ANSI environment because exit() is not declared volatile. */
280 string
= va_arg (args
, char *);
281 fprintf (stderr
, "\ngdb: ");
282 vfprintf (stderr
, string
, args
);
283 fprintf (stderr
, "\n");
288 /* Print an error message and exit, dumping core.
289 The arguments are printed a la printf (). */
293 fatal_dump_core (va_alist
)
300 string
= va_arg (args
, char *);
301 /* "internal error" is always correct, since GDB should never dump
302 core, no matter what the input. */
303 fprintf (stderr
, "\ngdb internal error: ");
304 vfprintf (stderr
, string
, args
);
305 fprintf (stderr
, "\n");
308 signal (SIGQUIT
, SIG_DFL
);
309 kill (getpid (), SIGQUIT
);
310 /* We should never get here, but just in case... */
314 /* The strerror() function can return NULL for errno values that are
315 out of range. Provide a "safe" version that always returns a
319 safe_strerror (errnum
)
325 if ((msg
= strerror (errnum
)) == NULL
)
327 sprintf (buf
, "(undocumented errno %d)", errnum
);
333 /* The strsignal() function can return NULL for signal values that are
334 out of range. Provide a "safe" version that always returns a
338 safe_strsignal (signo
)
344 if ((msg
= strsignal (signo
)) == NULL
)
346 sprintf (buf
, "(undocumented signal %d)", signo
);
353 /* Print the system error message for errno, and also mention STRING
354 as the file name for which the error was encountered.
355 Then return to command level. */
358 perror_with_name (string
)
364 err
= safe_strerror (errno
);
365 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
366 strcpy (combined
, string
);
367 strcat (combined
, ": ");
368 strcat (combined
, err
);
370 /* I understand setting these is a matter of taste. Still, some people
371 may clear errno but not know about bfd_error. Doing this here is not
373 bfd_error
= no_error
;
376 error ("%s.", combined
);
379 /* Print the system error message for ERRCODE, and also mention STRING
380 as the file name for which the error was encountered. */
383 print_sys_errmsg (string
, errcode
)
390 err
= safe_strerror (errcode
);
391 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
392 strcpy (combined
, string
);
393 strcat (combined
, ": ");
394 strcat (combined
, err
);
396 fprintf (stderr
, "%s.\n", combined
);
399 /* Control C eventually causes this to be called, at a convenient time. */
404 target_terminal_ours ();
405 wrap_here ((char *)0); /* Force out any pending output */
406 #if !defined(__GO32__)
408 ioctl (fileno (stdout
), TCFLSH
, 1);
409 #else /* not HAVE_TERMIO */
410 ioctl (fileno (stdout
), TIOCFLUSH
, 0);
411 #endif /* not HAVE_TERMIO */
415 error ("Quit (expect signal %d when inferior is resumed)", SIGINT
);
416 #endif /* TIOCGPGRP */
420 /* Control C comes here */
429 /* Restore the signal handler. */
430 signal (signo
, request_quit
);
438 /* Memory management stuff (malloc friends). */
440 #if defined (NO_MMALLOC)
447 return (malloc (size
));
451 mrealloc (md
, ptr
, size
)
456 if (ptr
== 0) /* Guard against old realloc's */
457 return malloc (size
);
459 return realloc (ptr
, size
);
470 #endif /* NO_MMALLOC */
472 #if defined (NO_MMALLOC) || defined (NO_MMALLOC_CHECK)
480 #else /* have mmalloc and want corruption checking */
485 fatal_dump_core ("Memory corruption");
488 /* Attempt to install hooks in mmalloc/mrealloc/mfree for the heap specified
489 by MD, to detect memory corruption. Note that MD may be NULL to specify
490 the default heap that grows via sbrk.
492 Note that for freshly created regions, we must call mmcheck prior to any
493 mallocs in the region. Otherwise, any region which was allocated prior to
494 installing the checking hooks, which is later reallocated or freed, will
495 fail the checks! The mmcheck function only allows initial hooks to be
496 installed before the first mmalloc. However, anytime after we have called
497 mmcheck the first time to install the checking hooks, we can call it again
498 to update the function pointer to the memory corruption handler.
500 Returns zero on failure, non-zero on success. */
506 if (!mmcheck (md
, malloc_botch
))
508 warning ("internal error: failed to install memory consistency checks");
514 #endif /* Have mmalloc and want corruption checking */
516 /* Called when a memory allocation fails, with the number of bytes of
517 memory requested in SIZE. */
525 fatal ("virtual memory exhausted: can't allocate %ld bytes.", size
);
529 fatal ("virtual memory exhausted.");
533 /* Like mmalloc but get error if no storage available, and protect against
534 the caller wanting to allocate zero bytes. Whether to return NULL for
535 a zero byte request, or translate the request into a request for one
536 byte of zero'd storage, is a religious issue. */
549 else if ((val
= mmalloc (md
, size
)) == NULL
)
556 /* Like mrealloc but get error if no storage available. */
559 xmrealloc (md
, ptr
, size
)
568 val
= mrealloc (md
, ptr
, size
);
572 val
= mmalloc (md
, size
);
581 /* Like malloc but get error if no storage available, and protect against
582 the caller wanting to allocate zero bytes. */
588 return (xmmalloc ((void *) NULL
, size
));
591 /* Like mrealloc but get error if no storage available. */
598 return (xmrealloc ((void *) NULL
, ptr
, size
));
602 /* My replacement for the read system call.
603 Used like `read' but keeps going if `read' returns too soon. */
606 myread (desc
, addr
, len
)
616 val
= read (desc
, addr
, len
);
627 /* Make a copy of the string at PTR with SIZE characters
628 (and add a null character at the end in the copy).
629 Uses malloc to get the space. Returns the address of the copy. */
632 savestring (ptr
, size
)
636 register char *p
= (char *) xmalloc (size
+ 1);
637 (void) memcpy (p
, ptr
, size
);
643 msavestring (md
, ptr
, size
)
648 register char *p
= (char *) xmmalloc (md
, size
+ 1);
649 (void) memcpy (p
, ptr
, size
);
654 /* The "const" is so it compiles under DGUX (which prototypes strsave
655 in <string.h>. FIXME: This should be named "xstrsave", shouldn't it?
656 Doesn't real strsave return NULL if out of memory? */
661 return savestring (ptr
, strlen (ptr
));
669 return (msavestring (md
, ptr
, strlen (ptr
)));
673 print_spaces (n
, file
)
681 /* Ask user a y-or-n question and return 1 iff answer is yes.
682 Takes three args which are given to printf to print the question.
683 The first, a control string, should end in "? ".
684 It should not say how to answer, because we do that. */
696 /* Automatically answer "yes" if input is not from a terminal. */
697 if (!input_from_terminal_p ())
703 ctlstr
= va_arg (args
, char *);
704 vfprintf_filtered (stdout
, ctlstr
, args
);
706 printf_filtered ("(y or n) ");
708 answer
= fgetc (stdin
);
709 clearerr (stdin
); /* in case of C-d */
710 if (answer
== EOF
) /* C-d */
712 if (answer
!= '\n') /* Eat rest of input line, to EOF or newline */
715 ans2
= fgetc (stdin
);
718 while (ans2
!= EOF
&& ans2
!= '\n');
725 printf_filtered ("Please answer y or n.\n");
730 /* Parse a C escape sequence. STRING_PTR points to a variable
731 containing a pointer to the string to parse. That pointer
732 should point to the character after the \. That pointer
733 is updated past the characters we use. The value of the
734 escape sequence is returned.
736 A negative value means the sequence \ newline was seen,
737 which is supposed to be equivalent to nothing at all.
739 If \ is followed by a null character, we return a negative
740 value and leave the string pointer pointing at the null character.
742 If \ is followed by 000, we return 0 and leave the string pointer
743 after the zeros. A value of 0 does not mean end of string. */
746 parse_escape (string_ptr
)
749 register int c
= *(*string_ptr
)++;
753 return 007; /* Bell (alert) char */
756 case 'e': /* Escape character */
774 c
= *(*string_ptr
)++;
776 c
= parse_escape (string_ptr
);
779 return (c
& 0200) | (c
& 037);
790 register int i
= c
- '0';
791 register int count
= 0;
794 if ((c
= *(*string_ptr
)++) >= '0' && c
<= '7')
812 /* Print the character C on STREAM as part of the contents
813 of a literal string whose delimiter is QUOTER. */
816 printchar (c
, stream
, quoter
)
822 c
&= 0xFF; /* Avoid sign bit follies */
824 if ( c
< 0x20 || /* Low control chars */
825 (c
>= 0x7F && c
< 0xA0) || /* DEL, High controls */
826 (sevenbit_strings
&& c
>= 0x80)) { /* high order bit set */
830 fputs_filtered ("\\n", stream
);
833 fputs_filtered ("\\b", stream
);
836 fputs_filtered ("\\t", stream
);
839 fputs_filtered ("\\f", stream
);
842 fputs_filtered ("\\r", stream
);
845 fputs_filtered ("\\e", stream
);
848 fputs_filtered ("\\a", stream
);
851 fprintf_filtered (stream
, "\\%.3o", (unsigned int) c
);
855 if (c
== '\\' || c
== quoter
)
856 fputs_filtered ("\\", stream
);
857 fprintf_filtered (stream
, "%c", c
);
861 /* Number of lines per page or UINT_MAX if paging is disabled. */
862 static unsigned int lines_per_page
;
863 /* Number of chars per line or UNIT_MAX is line folding is disabled. */
864 static unsigned int chars_per_line
;
865 /* Current count of lines printed on this page, chars on this line. */
866 static unsigned int lines_printed
, chars_printed
;
868 /* Buffer and start column of buffered text, for doing smarter word-
869 wrapping. When someone calls wrap_here(), we start buffering output
870 that comes through fputs_filtered(). If we see a newline, we just
871 spit it out and forget about the wrap_here(). If we see another
872 wrap_here(), we spit it out and remember the newer one. If we see
873 the end of the line, we spit out a newline, the indent, and then
876 wrap_column is the column number on the screen where wrap_buffer begins.
877 When wrap_column is zero, wrapping is not in effect.
878 wrap_buffer is malloc'd with chars_per_line+2 bytes.
879 When wrap_buffer[0] is null, the buffer is empty.
880 wrap_pointer points into it at the next character to fill.
881 wrap_indent is the string that should be used as indentation if the
884 static char *wrap_buffer
, *wrap_pointer
, *wrap_indent
;
885 static int wrap_column
;
889 set_width_command (args
, from_tty
, c
)
892 struct cmd_list_element
*c
;
896 wrap_buffer
= (char *) xmalloc (chars_per_line
+ 2);
897 wrap_buffer
[0] = '\0';
900 wrap_buffer
= (char *) xrealloc (wrap_buffer
, chars_per_line
+ 2);
901 wrap_pointer
= wrap_buffer
; /* Start it at the beginning */
905 prompt_for_continue ()
910 ignore
= gdb_readline ("---Type <return> to continue---");
913 chars_printed
= lines_printed
= 0;
915 dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
918 /* Reinitialize filter; ie. tell it to reset to original values. */
921 reinitialize_more_filter ()
927 /* Indicate that if the next sequence of characters overflows the line,
928 a newline should be inserted here rather than when it hits the end.
929 If INDENT is nonzero, it is a string to be printed to indent the
930 wrapped part on the next line. INDENT must remain accessible until
931 the next call to wrap_here() or until a newline is printed through
934 If the line is already overfull, we immediately print a newline and
935 the indentation, and disable further wrapping.
937 If we don't know the width of lines, but we know the page height,
938 we must not wrap words, but should still keep track of newlines
939 that were explicitly printed.
941 INDENT should not contain tabs, as that
942 will mess up the char count on the next line. FIXME. */
950 *wrap_pointer
= '\0';
951 fputs (wrap_buffer
, stdout
);
953 wrap_pointer
= wrap_buffer
;
954 wrap_buffer
[0] = '\0';
955 if (chars_per_line
== UINT_MAX
) /* No line overflow checking */
959 else if (chars_printed
>= chars_per_line
)
961 puts_filtered ("\n");
962 puts_filtered (indent
);
967 wrap_column
= chars_printed
;
968 wrap_indent
= indent
;
972 /* Like fputs but pause after every screenful, and can wrap at points
973 other than the final character of a line.
974 Unlike fputs, fputs_filtered does not return a value.
975 It is OK for LINEBUFFER to be NULL, in which case just don't print
978 Note that a longjmp to top level may occur in this routine
979 (since prompt_for_continue may do so) so this routine should not be
980 called when cleanups are not in place. */
983 fputs_filtered (linebuffer
, stream
)
984 const char *linebuffer
;
992 /* Don't do any filtering if it is disabled. */
994 || (lines_per_page
== UINT_MAX
&& chars_per_line
== UINT_MAX
))
996 fputs (linebuffer
, stream
);
1000 /* Go through and output each character. Show line extension
1001 when this is necessary; prompt user for new page when this is
1004 lineptr
= linebuffer
;
1007 /* Possible new page. */
1008 if (lines_printed
>= lines_per_page
- 1)
1009 prompt_for_continue ();
1011 while (*lineptr
&& *lineptr
!= '\n')
1013 /* Print a single line. */
1014 if (*lineptr
== '\t')
1017 *wrap_pointer
++ = '\t';
1019 putc ('\t', stream
);
1020 /* Shifting right by 3 produces the number of tab stops
1021 we have already passed, and then adding one and
1022 shifting left 3 advances to the next tab stop. */
1023 chars_printed
= ((chars_printed
>> 3) + 1) << 3;
1029 *wrap_pointer
++ = *lineptr
;
1031 putc (*lineptr
, stream
);
1036 if (chars_printed
>= chars_per_line
)
1038 unsigned int save_chars
= chars_printed
;
1042 /* If we aren't actually wrapping, don't output newline --
1043 if chars_per_line is right, we probably just overflowed
1044 anyway; if it's wrong, let us keep going. */
1046 putc ('\n', stream
);
1048 /* Possible new page. */
1049 if (lines_printed
>= lines_per_page
- 1)
1050 prompt_for_continue ();
1052 /* Now output indentation and wrapped string */
1056 fputs (wrap_indent
, stream
);
1057 *wrap_pointer
= '\0'; /* Null-terminate saved stuff */
1058 fputs (wrap_buffer
, stream
); /* and eject it */
1059 /* FIXME, this strlen is what prevents wrap_indent from
1060 containing tabs. However, if we recurse to print it
1061 and count its chars, we risk trouble if wrap_indent is
1062 longer than (the user settable) chars_per_line.
1063 Note also that this can set chars_printed > chars_per_line
1064 if we are printing a long string. */
1065 chars_printed
= strlen (wrap_indent
)
1066 + (save_chars
- wrap_column
);
1067 wrap_pointer
= wrap_buffer
; /* Reset buffer */
1068 wrap_buffer
[0] = '\0';
1069 wrap_column
= 0; /* And disable fancy wrap */
1074 if (*lineptr
== '\n')
1077 wrap_here ((char *)0); /* Spit out chars, cancel further wraps */
1079 putc ('\n', stream
);
1086 /* fputs_demangled is a variant of fputs_filtered that
1087 demangles g++ names.*/
1090 fputs_demangled (linebuffer
, stream
, arg_mode
)
1095 #define SYMBOL_MAX 1024
1097 #define SYMBOL_CHAR(c) (isascii(c) \
1098 && (isalnum(c) || (c) == '_' || (c) == CPLUS_MARKER))
1100 char buf
[SYMBOL_MAX
+1];
1101 # define SLOP 5 /* How much room to leave in buf */
1104 if (linebuffer
== NULL
)
1107 /* If user wants to see raw output, no problem. */
1109 fputs_filtered (linebuffer
, stream
);
1115 while ( *p
!= (char) 0 ) {
1118 /* collect non-interesting characters into buf */
1119 while ( *p
!= (char) 0 && !SYMBOL_CHAR(*p
) && i
< (int)sizeof(buf
)-SLOP
) {
1124 /* output the non-interesting characters without demangling */
1126 fputs_filtered(buf
, stream
);
1127 i
= 0; /* reset buf */
1130 /* and now the interesting characters */
1131 while (i
< SYMBOL_MAX
1134 && i
< (int)sizeof(buf
) - SLOP
) {
1142 if ( (result
= cplus_demangle(buf
, arg_mode
)) != NULL
) {
1143 fputs_filtered(result
, stream
);
1147 fputs_filtered(buf
, stream
);
1153 /* Print a variable number of ARGS using format FORMAT. If this
1154 information is going to put the amount written (since the last call
1155 to INITIALIZE_MORE_FILTER or the last page break) over the page size,
1156 print out a pause message and do a gdb_readline to get the users
1157 permision to continue.
1159 Unlike fprintf, this function does not return a value.
1161 We implement three variants, vfprintf (takes a vararg list and stream),
1162 fprintf (takes a stream to write on), and printf (the usual).
1164 Note that this routine has a restriction that the length of the
1165 final output line must be less than 255 characters *or* it must be
1166 less than twice the size of the format string. This is a very
1167 arbitrary restriction, but it is an internal restriction, so I'll
1168 put it in. This means that the %s format specifier is almost
1169 useless; unless the caller can GUARANTEE that the string is short
1170 enough, fputs_filtered should be used instead.
1172 Note also that a longjmp to top level may occur in this routine
1173 (since prompt_for_continue may do so) so this routine should not be
1174 called when cleanups are not in place. */
1177 vfprintf_filtered (stream
, format
, args
)
1182 static char *linebuffer
= (char *) 0;
1183 static int line_size
;
1186 format_length
= strlen (format
);
1188 /* Allocated linebuffer for the first time. */
1191 linebuffer
= (char *) xmalloc (255);
1195 /* Reallocate buffer to a larger size if this is necessary. */
1196 if (format_length
* 2 > line_size
)
1198 line_size
= format_length
* 2;
1200 /* You don't have to copy. */
1202 linebuffer
= (char *) xmalloc (line_size
);
1206 /* This won't blow up if the restrictions described above are
1208 (void) vsprintf (linebuffer
, format
, args
);
1210 fputs_filtered (linebuffer
, stream
);
1215 fprintf_filtered (va_alist
)
1223 stream
= va_arg (args
, FILE *);
1224 format
= va_arg (args
, char *);
1226 /* This won't blow up if the restrictions described above are
1228 vfprintf_filtered (stream
, format
, args
);
1234 printf_filtered (va_alist
)
1241 format
= va_arg (args
, char *);
1243 vfprintf_filtered (stdout
, format
, args
);
1250 puts_filtered (string
)
1253 fputs_filtered (string
, stdout
);
1256 /* Return a pointer to N spaces and a null. The pointer is good
1257 until the next call to here. */
1263 static char *spaces
;
1264 static int max_spaces
;
1270 spaces
= (char *) xmalloc (n
+1);
1271 for (t
= spaces
+n
; t
!= spaces
;)
1277 return spaces
+ max_spaces
- n
;
1280 /* Print N spaces. */
1282 print_spaces_filtered (n
, stream
)
1286 fputs_filtered (n_spaces (n
), stream
);
1289 /* C++ demangler stuff. */
1291 /* Make a copy of a symbol, applying C++ demangling if demangling is enabled
1292 and a demangled version exists. Note that the value returned from
1293 cplus_demangle is already allocated in malloc'd memory. */
1296 strdup_demangled (name
)
1299 char *demangled
= NULL
;
1303 demangled
= cplus_demangle (name
, DMGL_PARAMS
| DMGL_ANSI
);
1305 return ((demangled
!= NULL
) ? demangled
: strdup (name
));
1309 /* Print NAME on STREAM, demangling if necessary. */
1311 fprint_symbol (stream
, name
)
1317 || NULL
== (demangled
= cplus_demangle (name
, DMGL_PARAMS
| DMGL_ANSI
)))
1318 fputs_filtered (name
, stream
);
1321 fputs_filtered (demangled
, stream
);
1326 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
1327 differences in whitespace. Returns 0 if they match, non-zero if they
1328 don't (slightly different than strcmp()'s range of return values). */
1331 strcmp_iw (string1
, string2
)
1332 const char *string1
;
1333 const char *string2
;
1335 while ((*string1
!= '\0') && (*string2
!= '\0'))
1337 while (isspace (*string1
))
1341 while (isspace (*string2
))
1345 if (*string1
!= *string2
)
1349 if (*string1
!= '\0')
1355 return (!((*string1
== '\0') && (*string2
== '\0')));
1358 /* Demangle NAME and compare the result with LOOKFOR, ignoring any differences
1361 If a match is found, returns a pointer to the demangled version of NAME
1362 in malloc'd memory, which needs to be freed by the caller after use.
1363 If a match is not found, returns NULL.
1365 OPTIONS is a flags word that controls the demangling process and is just
1366 passed on to the demangler.
1368 When the caller sees a non-NULL result, it knows that NAME is the mangled
1369 equivalent of LOOKFOR, and it can use either NAME, the "official demangled"
1370 version of NAME (the return value) or the "unofficial demangled" version
1371 of NAME (LOOKFOR, which it already knows). */
1374 demangle_and_match (name
, lookfor
, options
)
1376 const char *lookfor
;
1381 if ((demangled
= cplus_demangle (name
, options
)) != NULL
)
1383 if (strcmp_iw (demangled
, lookfor
) != 0)
1394 _initialize_utils ()
1396 struct cmd_list_element
*c
;
1398 c
= add_set_cmd ("width", class_support
, var_uinteger
,
1399 (char *)&chars_per_line
,
1400 "Set number of characters gdb thinks are in a line.",
1402 add_show_from_set (c
, &showlist
);
1403 c
->function
.sfunc
= set_width_command
;
1406 (add_set_cmd ("height", class_support
,
1407 var_uinteger
, (char *)&lines_per_page
,
1408 "Set number of lines gdb thinks are in a page.", &setlist
),
1411 /* These defaults will be used if we are unable to get the correct
1412 values from termcap. */
1413 #if defined(__GO32__)
1414 lines_per_page
= ScreenRows();
1415 chars_per_line
= ScreenCols();
1417 lines_per_page
= 24;
1418 chars_per_line
= 80;
1419 /* Initialize the screen height and width from termcap. */
1421 char *termtype
= getenv ("TERM");
1423 /* Positive means success, nonpositive means failure. */
1426 /* 2048 is large enough for all known terminals, according to the
1427 GNU termcap manual. */
1428 char term_buffer
[2048];
1432 status
= tgetent (term_buffer
, termtype
);
1437 val
= tgetnum ("li");
1439 lines_per_page
= val
;
1441 /* The number of lines per page is not mentioned
1442 in the terminal description. This probably means
1443 that paging is not useful (e.g. emacs shell window),
1444 so disable paging. */
1445 lines_per_page
= UINT_MAX
;
1447 val
= tgetnum ("co");
1449 chars_per_line
= val
;
1454 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1456 /* If there is a better way to determine the window size, use it. */
1457 SIGWINCH_HANDLER ();
1460 /* If the output is not a terminal, don't paginate it. */
1461 if (!ISATTY (stdout
))
1462 lines_per_page
= UINT_MAX
;
1464 set_width_command ((char *)NULL
, 0, c
);
1467 (add_set_cmd ("demangle", class_support
, var_boolean
,
1469 "Set demangling of encoded C++ names when displaying symbols.",
1474 (add_set_cmd ("sevenbit-strings", class_support
, var_boolean
,
1475 (char *)&sevenbit_strings
,
1476 "Set printing of 8-bit characters in strings as \\nnn.",
1481 (add_set_cmd ("asm-demangle", class_support
, var_boolean
,
1482 (char *)&asm_demangle
,
1483 "Set demangling of C++ names in disassembly listings.",
1488 /* Machine specific function to handle SIGWINCH signal. */
1490 #ifdef SIGWINCH_HANDLER_BODY
1491 SIGWINCH_HANDLER_BODY
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