d747e0af3d
* All GDB files that #include defs.h: Removed stdio.h. (defs.h): #include stdio.h. This has been tested by building GDBs for all targets hosted on Sun4. None of the build problems were related to stdio.h inclusion. (n.b. many configurations don't build for other reasons.)
1224 lines
29 KiB
C
1224 lines
29 KiB
C
/* General utility routines for GDB, the GNU debugger.
|
||
Copyright 1986, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
||
|
||
#include "defs.h"
|
||
|
||
#include <sys/ioctl.h>
|
||
#include <sys/param.h>
|
||
#include <pwd.h>
|
||
#include <varargs.h>
|
||
#include <ctype.h>
|
||
#include <string.h>
|
||
|
||
#include "signals.h"
|
||
#include "gdbcmd.h"
|
||
#include "terminal.h"
|
||
#include "bfd.h"
|
||
#include "target.h"
|
||
|
||
/* Prototypes for local functions */
|
||
|
||
#if !defined (NO_MALLOC_CHECK)
|
||
static void
|
||
malloc_botch PARAMS ((void));
|
||
#endif /* NO_MALLOC_CHECK */
|
||
|
||
static void
|
||
fatal_dump_core (); /* Can't prototype with <varargs.h> usage... */
|
||
|
||
static void
|
||
prompt_for_continue PARAMS ((void));
|
||
|
||
static void
|
||
set_width_command PARAMS ((char *, int, struct cmd_list_element *));
|
||
|
||
static void
|
||
vfprintf_filtered PARAMS ((FILE *, char *, va_list));
|
||
|
||
/* If this definition isn't overridden by the header files, assume
|
||
that isatty and fileno exist on this system. */
|
||
#ifndef ISATTY
|
||
#define ISATTY(FP) (isatty (fileno (FP)))
|
||
#endif
|
||
|
||
/* Chain of cleanup actions established with make_cleanup,
|
||
to be executed if an error happens. */
|
||
|
||
static struct cleanup *cleanup_chain;
|
||
|
||
/* Nonzero means a quit has been requested. */
|
||
|
||
int quit_flag;
|
||
|
||
/* Nonzero means quit immediately if Control-C is typed now,
|
||
rather than waiting until QUIT is executed. */
|
||
|
||
int immediate_quit;
|
||
|
||
/* Nonzero means that encoded C++ names should be printed out in their
|
||
C++ form rather than raw. */
|
||
|
||
int demangle = 1;
|
||
|
||
/* Nonzero means that encoded C++ names should be printed out in their
|
||
C++ form even in assembler language displays. If this is set, but
|
||
DEMANGLE is zero, names are printed raw, i.e. DEMANGLE controls. */
|
||
|
||
int asm_demangle = 0;
|
||
|
||
/* Nonzero means that strings with character values >0x7F should be printed
|
||
as octal escapes. Zero means just print the value (e.g. it's an
|
||
international character, and the terminal or window can cope.) */
|
||
|
||
int sevenbit_strings = 0;
|
||
|
||
/* String to be printed before error messages, if any. */
|
||
|
||
char *error_pre_print;
|
||
char *warning_pre_print;
|
||
|
||
/* Add a new cleanup to the cleanup_chain,
|
||
and return the previous chain pointer
|
||
to be passed later to do_cleanups or discard_cleanups.
|
||
Args are FUNCTION to clean up with, and ARG to pass to it. */
|
||
|
||
struct cleanup *
|
||
make_cleanup (function, arg)
|
||
void (*function) PARAMS ((PTR));
|
||
PTR arg;
|
||
{
|
||
register struct cleanup *new
|
||
= (struct cleanup *) xmalloc (sizeof (struct cleanup));
|
||
register struct cleanup *old_chain = cleanup_chain;
|
||
|
||
new->next = cleanup_chain;
|
||
new->function = function;
|
||
new->arg = arg;
|
||
cleanup_chain = new;
|
||
|
||
return old_chain;
|
||
}
|
||
|
||
/* Discard cleanups and do the actions they describe
|
||
until we get back to the point OLD_CHAIN in the cleanup_chain. */
|
||
|
||
void
|
||
do_cleanups (old_chain)
|
||
register struct cleanup *old_chain;
|
||
{
|
||
register struct cleanup *ptr;
|
||
while ((ptr = cleanup_chain) != old_chain)
|
||
{
|
||
cleanup_chain = ptr->next; /* Do this first incase recursion */
|
||
(*ptr->function) (ptr->arg);
|
||
free (ptr);
|
||
}
|
||
}
|
||
|
||
/* Discard cleanups, not doing the actions they describe,
|
||
until we get back to the point OLD_CHAIN in the cleanup_chain. */
|
||
|
||
void
|
||
discard_cleanups (old_chain)
|
||
register struct cleanup *old_chain;
|
||
{
|
||
register struct cleanup *ptr;
|
||
while ((ptr = cleanup_chain) != old_chain)
|
||
{
|
||
cleanup_chain = ptr->next;
|
||
free (ptr);
|
||
}
|
||
}
|
||
|
||
/* Set the cleanup_chain to 0, and return the old cleanup chain. */
|
||
struct cleanup *
|
||
save_cleanups ()
|
||
{
|
||
struct cleanup *old_chain = cleanup_chain;
|
||
|
||
cleanup_chain = 0;
|
||
return old_chain;
|
||
}
|
||
|
||
/* Restore the cleanup chain from a previously saved chain. */
|
||
void
|
||
restore_cleanups (chain)
|
||
struct cleanup *chain;
|
||
{
|
||
cleanup_chain = chain;
|
||
}
|
||
|
||
/* This function is useful for cleanups.
|
||
Do
|
||
|
||
foo = xmalloc (...);
|
||
old_chain = make_cleanup (free_current_contents, &foo);
|
||
|
||
to arrange to free the object thus allocated. */
|
||
|
||
void
|
||
free_current_contents (location)
|
||
char **location;
|
||
{
|
||
free (*location);
|
||
}
|
||
|
||
/* Provide a known function that does nothing, to use as a base for
|
||
for a possibly long chain of cleanups. This is useful where we
|
||
use the cleanup chain for handling normal cleanups as well as dealing
|
||
with cleanups that need to be done as a result of a call to error().
|
||
In such cases, we may not be certain where the first cleanup is, unless
|
||
we have a do-nothing one to always use as the base. */
|
||
|
||
/* ARGSUSED */
|
||
void
|
||
null_cleanup (arg)
|
||
char **arg;
|
||
{
|
||
}
|
||
|
||
|
||
/* Provide a hook for modules wishing to print their own warning messages
|
||
to set up the terminal state in a compatible way, without them having
|
||
to import all the target_<...> macros. */
|
||
|
||
void
|
||
warning_setup ()
|
||
{
|
||
target_terminal_ours ();
|
||
wrap_here(""); /* Force out any buffered output */
|
||
fflush (stdout);
|
||
}
|
||
|
||
/* Print a warning message.
|
||
The first argument STRING is the warning message, used as a fprintf string,
|
||
and the remaining args are passed as arguments to it.
|
||
The primary difference between warnings and errors is that a warning
|
||
does not force the return to command level. */
|
||
|
||
/* VARARGS */
|
||
void
|
||
warning (va_alist)
|
||
va_dcl
|
||
{
|
||
va_list args;
|
||
char *string;
|
||
|
||
va_start (args);
|
||
target_terminal_ours ();
|
||
wrap_here(""); /* Force out any buffered output */
|
||
fflush (stdout);
|
||
if (warning_pre_print)
|
||
fprintf (stderr, warning_pre_print);
|
||
string = va_arg (args, char *);
|
||
vfprintf (stderr, string, args);
|
||
fprintf (stderr, "\n");
|
||
va_end (args);
|
||
}
|
||
|
||
/* Print an error message and return to command level.
|
||
The first argument STRING is the error message, used as a fprintf string,
|
||
and the remaining args are passed as arguments to it. */
|
||
|
||
/* VARARGS */
|
||
NORETURN void
|
||
error (va_alist)
|
||
va_dcl
|
||
{
|
||
va_list args;
|
||
char *string;
|
||
|
||
va_start (args);
|
||
target_terminal_ours ();
|
||
wrap_here(""); /* Force out any buffered output */
|
||
fflush (stdout);
|
||
if (error_pre_print)
|
||
fprintf (stderr, error_pre_print);
|
||
string = va_arg (args, char *);
|
||
vfprintf (stderr, string, args);
|
||
fprintf (stderr, "\n");
|
||
va_end (args);
|
||
return_to_top_level ();
|
||
}
|
||
|
||
/* Print an error message and exit reporting failure.
|
||
This is for a error that we cannot continue from.
|
||
The arguments are printed a la printf.
|
||
|
||
This function cannot be declared volatile (NORETURN) in an
|
||
ANSI environment because exit() is not declared volatile. */
|
||
|
||
/* VARARGS */
|
||
NORETURN void
|
||
fatal (va_alist)
|
||
va_dcl
|
||
{
|
||
va_list args;
|
||
char *string;
|
||
|
||
va_start (args);
|
||
string = va_arg (args, char *);
|
||
fprintf (stderr, "gdb: ");
|
||
vfprintf (stderr, string, args);
|
||
fprintf (stderr, "\n");
|
||
va_end (args);
|
||
exit (1);
|
||
}
|
||
|
||
/* Print an error message and exit, dumping core.
|
||
The arguments are printed a la printf (). */
|
||
|
||
/* VARARGS */
|
||
static void
|
||
fatal_dump_core (va_alist)
|
||
va_dcl
|
||
{
|
||
va_list args;
|
||
char *string;
|
||
|
||
va_start (args);
|
||
string = va_arg (args, char *);
|
||
/* "internal error" is always correct, since GDB should never dump
|
||
core, no matter what the input. */
|
||
fprintf (stderr, "gdb internal error: ");
|
||
vfprintf (stderr, string, args);
|
||
fprintf (stderr, "\n");
|
||
va_end (args);
|
||
|
||
signal (SIGQUIT, SIG_DFL);
|
||
kill (getpid (), SIGQUIT);
|
||
/* We should never get here, but just in case... */
|
||
exit (1);
|
||
}
|
||
|
||
|
||
/* Memory management stuff (malloc friends). */
|
||
|
||
#if defined (NO_MALLOC_CHECK)
|
||
void
|
||
init_malloc ()
|
||
{}
|
||
#else /* Have mcheck(). */
|
||
static void
|
||
malloc_botch ()
|
||
{
|
||
fatal_dump_core ("Memory corruption");
|
||
}
|
||
|
||
void
|
||
init_malloc ()
|
||
{
|
||
extern PTR (*__morecore) PARAMS ((long));
|
||
|
||
mcheck (malloc_botch);
|
||
mtrace ();
|
||
}
|
||
#endif /* Have mcheck(). */
|
||
|
||
/* Like malloc but get error if no storage available. */
|
||
|
||
PTR
|
||
xmalloc (size)
|
||
long size;
|
||
{
|
||
register char *val;
|
||
|
||
/* Protect against gdb wanting to allocate zero bytes. */
|
||
if (size == 0)
|
||
return NULL;
|
||
|
||
val = (char *) malloc (size);
|
||
if (!val)
|
||
fatal ("virtual memory exhausted.", 0);
|
||
return val;
|
||
}
|
||
|
||
/* Like realloc but get error if no storage available. */
|
||
|
||
PTR
|
||
xrealloc (ptr, size)
|
||
char *ptr;
|
||
long size;
|
||
{
|
||
register char *val =
|
||
ptr ? (char *) realloc (ptr, size) : (char*) malloc (size);
|
||
if (!val)
|
||
fatal ("virtual memory exhausted.", 0);
|
||
return val;
|
||
}
|
||
|
||
/* Print the system error message for errno, and also mention STRING
|
||
as the file name for which the error was encountered.
|
||
Then return to command level. */
|
||
|
||
void
|
||
perror_with_name (string)
|
||
char *string;
|
||
{
|
||
extern int sys_nerr;
|
||
extern char *sys_errlist[];
|
||
char *err;
|
||
char *combined;
|
||
|
||
if (errno < sys_nerr)
|
||
err = sys_errlist[errno];
|
||
else
|
||
err = "unknown error";
|
||
|
||
combined = (char *) alloca (strlen (err) + strlen (string) + 3);
|
||
strcpy (combined, string);
|
||
strcat (combined, ": ");
|
||
strcat (combined, err);
|
||
|
||
/* I understand setting these is a matter of taste. Still, some people
|
||
may clear errno but not know about bfd_error. Doing this here is not
|
||
unreasonable. */
|
||
bfd_error = no_error;
|
||
errno = 0;
|
||
|
||
error ("%s.", combined);
|
||
}
|
||
|
||
/* Print the system error message for ERRCODE, and also mention STRING
|
||
as the file name for which the error was encountered. */
|
||
|
||
void
|
||
print_sys_errmsg (string, errcode)
|
||
char *string;
|
||
int errcode;
|
||
{
|
||
extern int sys_nerr;
|
||
extern char *sys_errlist[];
|
||
char *err;
|
||
char *combined;
|
||
|
||
if (errcode < sys_nerr)
|
||
err = sys_errlist[errcode];
|
||
else
|
||
err = "unknown error";
|
||
|
||
combined = (char *) alloca (strlen (err) + strlen (string) + 3);
|
||
strcpy (combined, string);
|
||
strcat (combined, ": ");
|
||
strcat (combined, err);
|
||
|
||
printf ("%s.\n", combined);
|
||
}
|
||
|
||
/* Control C eventually causes this to be called, at a convenient time. */
|
||
|
||
void
|
||
quit ()
|
||
{
|
||
target_terminal_ours ();
|
||
wrap_here ((char *)0); /* Force out any pending output */
|
||
#ifdef HAVE_TERMIO
|
||
ioctl (fileno (stdout), TCFLSH, 1);
|
||
#else /* not HAVE_TERMIO */
|
||
ioctl (fileno (stdout), TIOCFLUSH, 0);
|
||
#endif /* not HAVE_TERMIO */
|
||
#ifdef TIOCGPGRP
|
||
error ("Quit");
|
||
#else
|
||
error ("Quit (expect signal %d when inferior is resumed)", SIGINT);
|
||
#endif /* TIOCGPGRP */
|
||
}
|
||
|
||
/* Control C comes here */
|
||
|
||
void
|
||
request_quit (signo)
|
||
int signo;
|
||
{
|
||
quit_flag = 1;
|
||
|
||
#ifdef USG
|
||
/* Restore the signal handler. */
|
||
signal (signo, request_quit);
|
||
#endif
|
||
|
||
if (immediate_quit)
|
||
quit ();
|
||
}
|
||
|
||
/* My replacement for the read system call.
|
||
Used like `read' but keeps going if `read' returns too soon. */
|
||
|
||
int
|
||
myread (desc, addr, len)
|
||
int desc;
|
||
char *addr;
|
||
int len;
|
||
{
|
||
register int val;
|
||
int orglen = len;
|
||
|
||
while (len > 0)
|
||
{
|
||
val = read (desc, addr, len);
|
||
if (val < 0)
|
||
return val;
|
||
if (val == 0)
|
||
return orglen - len;
|
||
len -= val;
|
||
addr += val;
|
||
}
|
||
return orglen;
|
||
}
|
||
|
||
/* Make a copy of the string at PTR with SIZE characters
|
||
(and add a null character at the end in the copy).
|
||
Uses malloc to get the space. Returns the address of the copy. */
|
||
|
||
char *
|
||
savestring (ptr, size)
|
||
const char *ptr;
|
||
int size;
|
||
{
|
||
register char *p = (char *) xmalloc (size + 1);
|
||
bcopy (ptr, p, size);
|
||
p[size] = 0;
|
||
return p;
|
||
}
|
||
|
||
/* The "const" is so it compiles under DGUX (which prototypes strsave
|
||
in <string.h>. FIXME: This should be named "xstrsave", shouldn't it?
|
||
Doesn't real strsave return NULL if out of memory? */
|
||
char *
|
||
strsave (ptr)
|
||
const char *ptr;
|
||
{
|
||
return savestring (ptr, strlen (ptr));
|
||
}
|
||
|
||
void
|
||
print_spaces (n, file)
|
||
register int n;
|
||
register FILE *file;
|
||
{
|
||
while (n-- > 0)
|
||
fputc (' ', file);
|
||
}
|
||
|
||
/* Ask user a y-or-n question and return 1 iff answer is yes.
|
||
Takes three args which are given to printf to print the question.
|
||
The first, a control string, should end in "? ".
|
||
It should not say how to answer, because we do that. */
|
||
|
||
/* VARARGS */
|
||
int
|
||
query (va_alist)
|
||
va_dcl
|
||
{
|
||
va_list args;
|
||
char *ctlstr;
|
||
register int answer;
|
||
register int ans2;
|
||
|
||
/* Automatically answer "yes" if input is not from a terminal. */
|
||
if (!input_from_terminal_p ())
|
||
return 1;
|
||
|
||
while (1)
|
||
{
|
||
va_start (args);
|
||
ctlstr = va_arg (args, char *);
|
||
vfprintf (stdout, ctlstr, args);
|
||
va_end (args);
|
||
printf ("(y or n) ");
|
||
fflush (stdout);
|
||
answer = fgetc (stdin);
|
||
clearerr (stdin); /* in case of C-d */
|
||
if (answer == EOF) /* C-d */
|
||
return 1;
|
||
if (answer != '\n') /* Eat rest of input line, to EOF or newline */
|
||
do
|
||
{
|
||
ans2 = fgetc (stdin);
|
||
clearerr (stdin);
|
||
}
|
||
while (ans2 != EOF && ans2 != '\n');
|
||
if (answer >= 'a')
|
||
answer -= 040;
|
||
if (answer == 'Y')
|
||
return 1;
|
||
if (answer == 'N')
|
||
return 0;
|
||
printf ("Please answer y or n.\n");
|
||
}
|
||
}
|
||
|
||
|
||
/* Parse a C escape sequence. STRING_PTR points to a variable
|
||
containing a pointer to the string to parse. That pointer
|
||
should point to the character after the \. That pointer
|
||
is updated past the characters we use. The value of the
|
||
escape sequence is returned.
|
||
|
||
A negative value means the sequence \ newline was seen,
|
||
which is supposed to be equivalent to nothing at all.
|
||
|
||
If \ is followed by a null character, we return a negative
|
||
value and leave the string pointer pointing at the null character.
|
||
|
||
If \ is followed by 000, we return 0 and leave the string pointer
|
||
after the zeros. A value of 0 does not mean end of string. */
|
||
|
||
int
|
||
parse_escape (string_ptr)
|
||
char **string_ptr;
|
||
{
|
||
register int c = *(*string_ptr)++;
|
||
switch (c)
|
||
{
|
||
case 'a':
|
||
return 007; /* Bell (alert) char */
|
||
case 'b':
|
||
return '\b';
|
||
case 'e': /* Escape character */
|
||
return 033;
|
||
case 'f':
|
||
return '\f';
|
||
case 'n':
|
||
return '\n';
|
||
case 'r':
|
||
return '\r';
|
||
case 't':
|
||
return '\t';
|
||
case 'v':
|
||
return '\v';
|
||
case '\n':
|
||
return -2;
|
||
case 0:
|
||
(*string_ptr)--;
|
||
return 0;
|
||
case '^':
|
||
c = *(*string_ptr)++;
|
||
if (c == '\\')
|
||
c = parse_escape (string_ptr);
|
||
if (c == '?')
|
||
return 0177;
|
||
return (c & 0200) | (c & 037);
|
||
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
{
|
||
register int i = c - '0';
|
||
register int count = 0;
|
||
while (++count < 3)
|
||
{
|
||
if ((c = *(*string_ptr)++) >= '0' && c <= '7')
|
||
{
|
||
i *= 8;
|
||
i += c - '0';
|
||
}
|
||
else
|
||
{
|
||
(*string_ptr)--;
|
||
break;
|
||
}
|
||
}
|
||
return i;
|
||
}
|
||
default:
|
||
return c;
|
||
}
|
||
}
|
||
|
||
/* Print the character C on STREAM as part of the contents
|
||
of a literal string whose delimiter is QUOTER. */
|
||
|
||
void
|
||
printchar (c, stream, quoter)
|
||
register int c;
|
||
FILE *stream;
|
||
int quoter;
|
||
{
|
||
|
||
if (c < 040 || (sevenbit_strings && c >= 0177)) {
|
||
switch (c)
|
||
{
|
||
case '\n':
|
||
fputs_filtered ("\\n", stream);
|
||
break;
|
||
case '\b':
|
||
fputs_filtered ("\\b", stream);
|
||
break;
|
||
case '\t':
|
||
fputs_filtered ("\\t", stream);
|
||
break;
|
||
case '\f':
|
||
fputs_filtered ("\\f", stream);
|
||
break;
|
||
case '\r':
|
||
fputs_filtered ("\\r", stream);
|
||
break;
|
||
case '\033':
|
||
fputs_filtered ("\\e", stream);
|
||
break;
|
||
case '\007':
|
||
fputs_filtered ("\\a", stream);
|
||
break;
|
||
default:
|
||
fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
|
||
break;
|
||
}
|
||
} else {
|
||
if (c == '\\' || c == quoter)
|
||
fputs_filtered ("\\", stream);
|
||
fprintf_filtered (stream, "%c", c);
|
||
}
|
||
}
|
||
|
||
/* Number of lines per page or UINT_MAX if paging is disabled. */
|
||
static unsigned int lines_per_page;
|
||
/* Number of chars per line or UNIT_MAX is line folding is disabled. */
|
||
static unsigned int chars_per_line;
|
||
/* Current count of lines printed on this page, chars on this line. */
|
||
static unsigned int lines_printed, chars_printed;
|
||
|
||
/* Buffer and start column of buffered text, for doing smarter word-
|
||
wrapping. When someone calls wrap_here(), we start buffering output
|
||
that comes through fputs_filtered(). If we see a newline, we just
|
||
spit it out and forget about the wrap_here(). If we see another
|
||
wrap_here(), we spit it out and remember the newer one. If we see
|
||
the end of the line, we spit out a newline, the indent, and then
|
||
the buffered output.
|
||
|
||
wrap_column is the column number on the screen where wrap_buffer begins.
|
||
When wrap_column is zero, wrapping is not in effect.
|
||
wrap_buffer is malloc'd with chars_per_line+2 bytes.
|
||
When wrap_buffer[0] is null, the buffer is empty.
|
||
wrap_pointer points into it at the next character to fill.
|
||
wrap_indent is the string that should be used as indentation if the
|
||
wrap occurs. */
|
||
|
||
static char *wrap_buffer, *wrap_pointer, *wrap_indent;
|
||
static int wrap_column;
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
set_width_command (args, from_tty, c)
|
||
char *args;
|
||
int from_tty;
|
||
struct cmd_list_element *c;
|
||
{
|
||
if (!wrap_buffer)
|
||
{
|
||
wrap_buffer = (char *) xmalloc (chars_per_line + 2);
|
||
wrap_buffer[0] = '\0';
|
||
}
|
||
else
|
||
wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2);
|
||
wrap_pointer = wrap_buffer; /* Start it at the beginning */
|
||
}
|
||
|
||
static void
|
||
prompt_for_continue ()
|
||
{
|
||
char *ignore;
|
||
|
||
immediate_quit++;
|
||
ignore = gdb_readline ("---Type <return> to continue---");
|
||
if (ignore)
|
||
free (ignore);
|
||
chars_printed = lines_printed = 0;
|
||
immediate_quit--;
|
||
dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
|
||
}
|
||
|
||
/* Reinitialize filter; ie. tell it to reset to original values. */
|
||
|
||
void
|
||
reinitialize_more_filter ()
|
||
{
|
||
lines_printed = 0;
|
||
chars_printed = 0;
|
||
}
|
||
|
||
/* Indicate that if the next sequence of characters overflows the line,
|
||
a newline should be inserted here rather than when it hits the end.
|
||
If INDENT is nonzero, it is a string to be printed to indent the
|
||
wrapped part on the next line. INDENT must remain accessible until
|
||
the next call to wrap_here() or until a newline is printed through
|
||
fputs_filtered().
|
||
|
||
If the line is already overfull, we immediately print a newline and
|
||
the indentation, and disable further wrapping.
|
||
|
||
If we don't know the width of lines, but we know the page height,
|
||
we must not wrap words, but should still keep track of newlines
|
||
that were explicitly printed.
|
||
|
||
INDENT should not contain tabs, as that
|
||
will mess up the char count on the next line. FIXME. */
|
||
|
||
void
|
||
wrap_here(indent)
|
||
char *indent;
|
||
{
|
||
if (wrap_buffer[0])
|
||
{
|
||
*wrap_pointer = '\0';
|
||
fputs (wrap_buffer, stdout);
|
||
}
|
||
wrap_pointer = wrap_buffer;
|
||
wrap_buffer[0] = '\0';
|
||
if (chars_per_line == UINT_MAX) /* No line overflow checking */
|
||
{
|
||
wrap_column = 0;
|
||
}
|
||
else if (chars_printed >= chars_per_line)
|
||
{
|
||
puts_filtered ("\n");
|
||
puts_filtered (indent);
|
||
wrap_column = 0;
|
||
}
|
||
else
|
||
{
|
||
wrap_column = chars_printed;
|
||
wrap_indent = indent;
|
||
}
|
||
}
|
||
|
||
/* Like fputs but pause after every screenful, and can wrap at points
|
||
other than the final character of a line.
|
||
Unlike fputs, fputs_filtered does not return a value.
|
||
It is OK for LINEBUFFER to be NULL, in which case just don't print
|
||
anything.
|
||
|
||
Note that a longjmp to top level may occur in this routine
|
||
(since prompt_for_continue may do so) so this routine should not be
|
||
called when cleanups are not in place. */
|
||
|
||
void
|
||
fputs_filtered (linebuffer, stream)
|
||
const char *linebuffer;
|
||
FILE *stream;
|
||
{
|
||
const char *lineptr;
|
||
|
||
if (linebuffer == 0)
|
||
return;
|
||
|
||
/* Don't do any filtering if it is disabled. */
|
||
if (stream != stdout
|
||
|| (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX))
|
||
{
|
||
fputs (linebuffer, stream);
|
||
return;
|
||
}
|
||
|
||
/* Go through and output each character. Show line extension
|
||
when this is necessary; prompt user for new page when this is
|
||
necessary. */
|
||
|
||
lineptr = linebuffer;
|
||
while (*lineptr)
|
||
{
|
||
/* Possible new page. */
|
||
if (lines_printed >= lines_per_page - 1)
|
||
prompt_for_continue ();
|
||
|
||
while (*lineptr && *lineptr != '\n')
|
||
{
|
||
/* Print a single line. */
|
||
if (*lineptr == '\t')
|
||
{
|
||
if (wrap_column)
|
||
*wrap_pointer++ = '\t';
|
||
else
|
||
putc ('\t', stream);
|
||
/* Shifting right by 3 produces the number of tab stops
|
||
we have already passed, and then adding one and
|
||
shifting left 3 advances to the next tab stop. */
|
||
chars_printed = ((chars_printed >> 3) + 1) << 3;
|
||
lineptr++;
|
||
}
|
||
else
|
||
{
|
||
if (wrap_column)
|
||
*wrap_pointer++ = *lineptr;
|
||
else
|
||
putc (*lineptr, stream);
|
||
chars_printed++;
|
||
lineptr++;
|
||
}
|
||
|
||
if (chars_printed >= chars_per_line)
|
||
{
|
||
unsigned int save_chars = chars_printed;
|
||
|
||
chars_printed = 0;
|
||
lines_printed++;
|
||
/* If we aren't actually wrapping, don't output newline --
|
||
if chars_per_line is right, we probably just overflowed
|
||
anyway; if it's wrong, let us keep going. */
|
||
if (wrap_column)
|
||
putc ('\n', stream);
|
||
|
||
/* Possible new page. */
|
||
if (lines_printed >= lines_per_page - 1)
|
||
prompt_for_continue ();
|
||
|
||
/* Now output indentation and wrapped string */
|
||
if (wrap_column)
|
||
{
|
||
if (wrap_indent)
|
||
fputs (wrap_indent, stream);
|
||
*wrap_pointer = '\0'; /* Null-terminate saved stuff */
|
||
fputs (wrap_buffer, stream); /* and eject it */
|
||
/* FIXME, this strlen is what prevents wrap_indent from
|
||
containing tabs. However, if we recurse to print it
|
||
and count its chars, we risk trouble if wrap_indent is
|
||
longer than (the user settable) chars_per_line.
|
||
Note also that this can set chars_printed > chars_per_line
|
||
if we are printing a long string. */
|
||
chars_printed = strlen (wrap_indent)
|
||
+ (save_chars - wrap_column);
|
||
wrap_pointer = wrap_buffer; /* Reset buffer */
|
||
wrap_buffer[0] = '\0';
|
||
wrap_column = 0; /* And disable fancy wrap */
|
||
}
|
||
}
|
||
}
|
||
|
||
if (*lineptr == '\n')
|
||
{
|
||
chars_printed = 0;
|
||
wrap_here ((char *)0); /* Spit out chars, cancel further wraps */
|
||
lines_printed++;
|
||
putc ('\n', stream);
|
||
lineptr++;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/* fputs_demangled is a variant of fputs_filtered that
|
||
demangles g++ names.*/
|
||
|
||
void
|
||
fputs_demangled (linebuffer, stream, arg_mode)
|
||
char *linebuffer;
|
||
FILE *stream;
|
||
int arg_mode;
|
||
{
|
||
#define SYMBOL_MAX 1024
|
||
|
||
#define SYMBOL_CHAR(c) (isascii(c) \
|
||
&& (isalnum(c) || (c) == '_' || (c) == CPLUS_MARKER))
|
||
|
||
char buf[SYMBOL_MAX+1];
|
||
# define SLOP 5 /* How much room to leave in buf */
|
||
char *p;
|
||
|
||
if (linebuffer == NULL)
|
||
return;
|
||
|
||
/* If user wants to see raw output, no problem. */
|
||
if (!demangle) {
|
||
fputs_filtered (linebuffer, stream);
|
||
return;
|
||
}
|
||
|
||
p = linebuffer;
|
||
|
||
while ( *p != (char) 0 ) {
|
||
int i = 0;
|
||
|
||
/* collect non-interesting characters into buf */
|
||
while ( *p != (char) 0 && !SYMBOL_CHAR(*p) && i < (int)sizeof(buf)-SLOP ) {
|
||
buf[i++] = *p;
|
||
p++;
|
||
}
|
||
if (i > 0) {
|
||
/* output the non-interesting characters without demangling */
|
||
buf[i] = (char) 0;
|
||
fputs_filtered(buf, stream);
|
||
i = 0; /* reset buf */
|
||
}
|
||
|
||
/* and now the interesting characters */
|
||
while (i < SYMBOL_MAX
|
||
&& *p != (char) 0
|
||
&& SYMBOL_CHAR(*p)
|
||
&& i < (int)sizeof(buf) - SLOP) {
|
||
buf[i++] = *p;
|
||
p++;
|
||
}
|
||
buf[i] = (char) 0;
|
||
if (i > 0) {
|
||
char * result;
|
||
|
||
if ( (result = cplus_demangle(buf, arg_mode)) != NULL ) {
|
||
fputs_filtered(result, stream);
|
||
free(result);
|
||
}
|
||
else {
|
||
fputs_filtered(buf, stream);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Print a variable number of ARGS using format FORMAT. If this
|
||
information is going to put the amount written (since the last call
|
||
to INITIALIZE_MORE_FILTER or the last page break) over the page size,
|
||
print out a pause message and do a gdb_readline to get the users
|
||
permision to continue.
|
||
|
||
Unlike fprintf, this function does not return a value.
|
||
|
||
We implement three variants, vfprintf (takes a vararg list and stream),
|
||
fprintf (takes a stream to write on), and printf (the usual).
|
||
|
||
Note that this routine has a restriction that the length of the
|
||
final output line must be less than 255 characters *or* it must be
|
||
less than twice the size of the format string. This is a very
|
||
arbitrary restriction, but it is an internal restriction, so I'll
|
||
put it in. This means that the %s format specifier is almost
|
||
useless; unless the caller can GUARANTEE that the string is short
|
||
enough, fputs_filtered should be used instead.
|
||
|
||
Note also that a longjmp to top level may occur in this routine
|
||
(since prompt_for_continue may do so) so this routine should not be
|
||
called when cleanups are not in place. */
|
||
|
||
static void
|
||
vfprintf_filtered (stream, format, args)
|
||
FILE *stream;
|
||
char *format;
|
||
va_list args;
|
||
{
|
||
static char *linebuffer = (char *) 0;
|
||
static int line_size;
|
||
int format_length;
|
||
|
||
format_length = strlen (format);
|
||
|
||
/* Allocated linebuffer for the first time. */
|
||
if (!linebuffer)
|
||
{
|
||
linebuffer = (char *) xmalloc (255);
|
||
line_size = 255;
|
||
}
|
||
|
||
/* Reallocate buffer to a larger size if this is necessary. */
|
||
if (format_length * 2 > line_size)
|
||
{
|
||
line_size = format_length * 2;
|
||
|
||
/* You don't have to copy. */
|
||
free (linebuffer);
|
||
linebuffer = (char *) xmalloc (line_size);
|
||
}
|
||
|
||
|
||
/* This won't blow up if the restrictions described above are
|
||
followed. */
|
||
(void) vsprintf (linebuffer, format, args);
|
||
|
||
fputs_filtered (linebuffer, stream);
|
||
}
|
||
|
||
/* VARARGS */
|
||
void
|
||
fprintf_filtered (va_alist)
|
||
va_dcl
|
||
{
|
||
FILE *stream;
|
||
char *format;
|
||
va_list args;
|
||
|
||
va_start (args);
|
||
stream = va_arg (args, FILE *);
|
||
format = va_arg (args, char *);
|
||
|
||
/* This won't blow up if the restrictions described above are
|
||
followed. */
|
||
vfprintf_filtered (stream, format, args);
|
||
va_end (args);
|
||
}
|
||
|
||
/* VARARGS */
|
||
void
|
||
printf_filtered (va_alist)
|
||
va_dcl
|
||
{
|
||
va_list args;
|
||
char *format;
|
||
|
||
va_start (args);
|
||
format = va_arg (args, char *);
|
||
|
||
vfprintf_filtered (stdout, format, args);
|
||
va_end (args);
|
||
}
|
||
|
||
/* Easy */
|
||
|
||
void
|
||
puts_filtered (string)
|
||
char *string;
|
||
{
|
||
fputs_filtered (string, stdout);
|
||
}
|
||
|
||
/* Return a pointer to N spaces and a null. The pointer is good
|
||
until the next call to here. */
|
||
char *
|
||
n_spaces (n)
|
||
int n;
|
||
{
|
||
register char *t;
|
||
static char *spaces;
|
||
static int max_spaces;
|
||
|
||
if (n > max_spaces)
|
||
{
|
||
if (spaces)
|
||
free (spaces);
|
||
spaces = (char *) malloc (n+1);
|
||
for (t = spaces+n; t != spaces;)
|
||
*--t = ' ';
|
||
spaces[n] = '\0';
|
||
max_spaces = n;
|
||
}
|
||
|
||
return spaces + max_spaces - n;
|
||
}
|
||
|
||
/* Print N spaces. */
|
||
void
|
||
print_spaces_filtered (n, stream)
|
||
int n;
|
||
FILE *stream;
|
||
{
|
||
fputs_filtered (n_spaces (n), stream);
|
||
}
|
||
|
||
/* C++ demangler stuff. */
|
||
|
||
/* Print NAME on STREAM, demangling if necessary. */
|
||
void
|
||
fprint_symbol (stream, name)
|
||
FILE *stream;
|
||
char *name;
|
||
{
|
||
char *demangled;
|
||
if ((!demangle) || NULL == (demangled = cplus_demangle (name, 1)))
|
||
fputs_filtered (name, stream);
|
||
else
|
||
{
|
||
fputs_filtered (demangled, stream);
|
||
free (demangled);
|
||
}
|
||
}
|
||
|
||
void
|
||
_initialize_utils ()
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
c = add_set_cmd ("width", class_support, var_uinteger,
|
||
(char *)&chars_per_line,
|
||
"Set number of characters gdb thinks are in a line.",
|
||
&setlist);
|
||
add_show_from_set (c, &showlist);
|
||
c->function.sfunc = set_width_command;
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("height", class_support,
|
||
var_uinteger, (char *)&lines_per_page,
|
||
"Set number of lines gdb thinks are in a page.", &setlist),
|
||
&showlist);
|
||
|
||
/* These defaults will be used if we are unable to get the correct
|
||
values from termcap. */
|
||
lines_per_page = 24;
|
||
chars_per_line = 80;
|
||
/* Initialize the screen height and width from termcap. */
|
||
{
|
||
char *termtype = getenv ("TERM");
|
||
|
||
/* Positive means success, nonpositive means failure. */
|
||
int status;
|
||
|
||
/* 2048 is large enough for all known terminals, according to the
|
||
GNU termcap manual. */
|
||
char term_buffer[2048];
|
||
|
||
if (termtype)
|
||
{
|
||
status = tgetent (term_buffer, termtype);
|
||
if (status > 0)
|
||
{
|
||
int val;
|
||
|
||
val = tgetnum ("li");
|
||
if (val >= 0)
|
||
lines_per_page = val;
|
||
else
|
||
/* The number of lines per page is not mentioned
|
||
in the terminal description. This probably means
|
||
that paging is not useful (e.g. emacs shell window),
|
||
so disable paging. */
|
||
lines_per_page = UINT_MAX;
|
||
|
||
val = tgetnum ("co");
|
||
if (val >= 0)
|
||
chars_per_line = val;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* If the output is not a terminal, don't paginate it. */
|
||
if (!ISATTY (stdout))
|
||
lines_per_page = UINT_MAX;
|
||
|
||
set_width_command ((char *)NULL, 0, c);
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("demangle", class_support, var_boolean,
|
||
(char *)&demangle,
|
||
"Set demangling of encoded C++ names when displaying symbols.",
|
||
&setprintlist),
|
||
&showprintlist);
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("sevenbit-strings", class_support, var_boolean,
|
||
(char *)&sevenbit_strings,
|
||
"Set printing of 8-bit characters in strings as \\nnn.",
|
||
&setprintlist),
|
||
&showprintlist);
|
||
|
||
add_show_from_set
|
||
(add_set_cmd ("asm-demangle", class_support, var_boolean,
|
||
(char *)&asm_demangle,
|
||
"Set demangling of C++ names in disassembly listings.",
|
||
&setprintlist),
|
||
&showprintlist);
|
||
}
|