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https://sourceware.org/git/binutils-gdb.git
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1270 lines
30 KiB
C
1270 lines
30 KiB
C
/* General utility routines for GDB, the GNU debugger.
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Copyright (C) 1986, 1989, 1990, 1991 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include <sys/ioctl.h>
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#include <sys/param.h>
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#include <pwd.h>
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#include <varargs.h>
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#include <ctype.h>
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#include <string.h>
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#include "defs.h"
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#include "param.h"
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#include "signals.h"
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#include "gdbcmd.h"
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#include "terminal.h"
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#include "bfd.h"
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#include "target.h"
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extern volatile void return_to_top_level ();
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extern volatile void exit ();
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extern char *gdb_readline ();
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extern char *getenv();
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extern char *malloc();
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extern char *realloc();
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/* If this definition isn't overridden by the header files, assume
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that isatty and fileno exist on this system. */
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#ifndef ISATTY
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#define ISATTY(FP) (isatty (fileno (FP)))
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#endif
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#ifdef MISSING_VPRINTF
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#ifdef __GNU_LIBRARY
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#undef MISSING_VPRINTF
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#else /* !__GNU_LIBRARY */
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#ifndef vfprintf
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/* Can't #define it since language.c needs it (though FIXME it shouldn't) */
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void
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vfprintf (file, format, ap)
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FILE *file;
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char *format;
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va_list ap;
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{
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_doprnt (format, ap, file);
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}
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#endif /* vfprintf */
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#ifndef vprintf
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/* Can't #define it since printcmd.c needs it */
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void
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vprintf (format, ap)
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char *format;
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va_list ap;
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{
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vfprintf (stdout, format, ap);
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}
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#endif /* vprintf */
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#endif /* GNU_LIBRARY */
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#endif /* MISSING_VPRINTF */
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void error ();
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void fatal ();
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/* Chain of cleanup actions established with make_cleanup,
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to be executed if an error happens. */
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static struct cleanup *cleanup_chain;
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/* Nonzero means a quit has been requested. */
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int quit_flag;
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/* Nonzero means quit immediately if Control-C is typed now,
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rather than waiting until QUIT is executed. */
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int immediate_quit;
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/* Nonzero means that encoded C++ names should be printed out in their
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C++ form rather than raw. */
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int demangle = 1;
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/* Nonzero means that encoded C++ names should be printed out in their
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C++ form even in assembler language displays. If this is set, but
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DEMANGLE is zero, names are printed raw, i.e. DEMANGLE controls. */
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int asm_demangle = 0;
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/* Nonzero means that strings with character values >0x7F should be printed
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as octal escapes. Zero means just print the value (e.g. it's an
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international character, and the terminal or window can cope.) */
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int sevenbit_strings = 0;
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/* String to be printed before error messages, if any. */
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char *error_pre_print;
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char *warning_pre_print;
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/* Add a new cleanup to the cleanup_chain,
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and return the previous chain pointer
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to be passed later to do_cleanups or discard_cleanups.
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Args are FUNCTION to clean up with, and ARG to pass to it. */
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struct cleanup *
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make_cleanup (function, arg)
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void (*function) ();
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int arg;
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{
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register struct cleanup *new
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= (struct cleanup *) xmalloc (sizeof (struct cleanup));
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register struct cleanup *old_chain = cleanup_chain;
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new->next = cleanup_chain;
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new->function = function;
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new->arg = arg;
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cleanup_chain = new;
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return old_chain;
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}
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/* Discard cleanups and do the actions they describe
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until we get back to the point OLD_CHAIN in the cleanup_chain. */
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void
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do_cleanups (old_chain)
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register struct cleanup *old_chain;
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{
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register struct cleanup *ptr;
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while ((ptr = cleanup_chain) != old_chain)
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{
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cleanup_chain = ptr->next; /* Do this first incase recursion */
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(*ptr->function) (ptr->arg);
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free (ptr);
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}
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}
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/* Discard cleanups, not doing the actions they describe,
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until we get back to the point OLD_CHAIN in the cleanup_chain. */
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void
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discard_cleanups (old_chain)
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register struct cleanup *old_chain;
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{
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register struct cleanup *ptr;
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while ((ptr = cleanup_chain) != old_chain)
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{
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cleanup_chain = ptr->next;
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free (ptr);
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}
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}
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/* Set the cleanup_chain to 0, and return the old cleanup chain. */
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struct cleanup *
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save_cleanups ()
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{
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struct cleanup *old_chain = cleanup_chain;
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cleanup_chain = 0;
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return old_chain;
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}
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/* Restore the cleanup chain from a previously saved chain. */
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void
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restore_cleanups (chain)
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struct cleanup *chain;
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{
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cleanup_chain = chain;
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}
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/* This function is useful for cleanups.
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Do
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foo = xmalloc (...);
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old_chain = make_cleanup (free_current_contents, &foo);
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to arrange to free the object thus allocated. */
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void
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free_current_contents (location)
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char **location;
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{
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free (*location);
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}
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/* Provide a hook for modules wishing to print their own warning messages
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to set up the terminal state in a compatible way, without them having
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to import all the target_<...> macros. */
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void
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warning_setup ()
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{
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target_terminal_ours ();
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wrap_here(""); /* Force out any buffered output */
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fflush (stdout);
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}
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/* Print a warning message.
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The first argument STRING is the warning message, used as a fprintf string,
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and the remaining args are passed as arguments to it.
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The primary difference between warnings and errors is that a warning
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does not force the return to command level. */
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/* VARARGS */
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void
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warning (va_alist)
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va_dcl
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{
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va_list args;
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char *string;
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va_start (args);
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target_terminal_ours ();
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wrap_here(""); /* Force out any buffered output */
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fflush (stdout);
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if (warning_pre_print)
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fprintf (stderr, warning_pre_print);
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string = va_arg (args, char *);
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vfprintf (stderr, string, args);
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fprintf (stderr, "\n");
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va_end (args);
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}
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/* Print an error message and return to command level.
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The first argument STRING is the error message, used as a fprintf string,
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and the remaining args are passed as arguments to it. */
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/* VARARGS */
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void
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error (va_alist)
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va_dcl
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{
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va_list args;
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char *string;
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va_start (args);
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target_terminal_ours ();
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wrap_here(""); /* Force out any buffered output */
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fflush (stdout);
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if (error_pre_print)
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fprintf (stderr, error_pre_print);
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string = va_arg (args, char *);
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vfprintf (stderr, string, args);
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fprintf (stderr, "\n");
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va_end (args);
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return_to_top_level ();
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}
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/* Print an error message and exit reporting failure.
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This is for a error that we cannot continue from.
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The arguments are printed a la printf. */
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/* VARARGS */
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void
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fatal (va_alist)
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va_dcl
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{
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va_list args;
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char *string;
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va_start (args);
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string = va_arg (args, char *);
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fprintf (stderr, "gdb: ");
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vfprintf (stderr, string, args);
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fprintf (stderr, "\n");
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va_end (args);
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exit (1);
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}
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/* Print an error message and exit, dumping core.
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The arguments are printed a la printf (). */
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/* VARARGS */
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void
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fatal_dump_core (va_alist)
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va_dcl
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{
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va_list args;
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char *string;
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va_start (args);
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string = va_arg (args, char *);
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/* "internal error" is always correct, since GDB should never dump
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core, no matter what the input. */
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fprintf (stderr, "gdb internal error: ");
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vfprintf (stderr, string, args);
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fprintf (stderr, "\n");
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va_end (args);
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signal (SIGQUIT, SIG_DFL);
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kill (getpid (), SIGQUIT);
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/* We should never get here, but just in case... */
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exit (1);
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}
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/* Memory management stuff (malloc friends). */
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#if defined (NO_MALLOC_CHECK)
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void
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init_malloc ()
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{}
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#else /* Have mcheck(). */
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static void
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malloc_botch ()
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{
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fatal_dump_core ("Memory corruption");
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}
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void
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init_malloc ()
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{
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mcheck (malloc_botch);
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mtrace ();
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}
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#endif /* Have mcheck(). */
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/* Like malloc but get error if no storage available. */
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#ifdef __STDC__
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void *
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#else
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char *
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#endif
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xmalloc (size)
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long size;
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{
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register char *val;
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/* At least one place (dbxread.c:condense_misc_bunches where misc_count == 0)
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GDB wants to allocate zero bytes. */
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if (size == 0)
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return NULL;
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val = (char *) malloc (size);
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if (!val)
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fatal ("virtual memory exhausted.", 0);
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return val;
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}
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/* Like realloc but get error if no storage available. */
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#ifdef __STDC__
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void *
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#else
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char *
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#endif
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xrealloc (ptr, size)
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char *ptr;
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long size;
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{
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register char *val = (char *) realloc (ptr, size);
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if (!val)
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fatal ("virtual memory exhausted.", 0);
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return val;
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}
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/* Print the system error message for errno, and also mention STRING
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as the file name for which the error was encountered.
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Then return to command level. */
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void
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perror_with_name (string)
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char *string;
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{
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extern int sys_nerr;
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extern char *sys_errlist[];
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char *err;
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char *combined;
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if (errno < sys_nerr)
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err = sys_errlist[errno];
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else
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err = "unknown error";
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combined = (char *) alloca (strlen (err) + strlen (string) + 3);
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strcpy (combined, string);
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strcat (combined, ": ");
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strcat (combined, err);
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/* I understand setting these is a matter of taste. Still, some people
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may clear errno but not know about bfd_error. Doing this here is not
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unreasonable. */
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bfd_error = no_error;
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errno = 0;
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error ("%s.", combined);
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}
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/* Print the system error message for ERRCODE, and also mention STRING
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as the file name for which the error was encountered. */
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void
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print_sys_errmsg (string, errcode)
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char *string;
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int errcode;
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{
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extern int sys_nerr;
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extern char *sys_errlist[];
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char *err;
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char *combined;
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if (errcode < sys_nerr)
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err = sys_errlist[errcode];
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else
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err = "unknown error";
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combined = (char *) alloca (strlen (err) + strlen (string) + 3);
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strcpy (combined, string);
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strcat (combined, ": ");
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strcat (combined, err);
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printf ("%s.\n", combined);
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}
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/* Control C eventually causes this to be called, at a convenient time. */
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void
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quit ()
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{
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target_terminal_ours ();
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wrap_here ((char *)0); /* Force out any pending output */
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#ifdef HAVE_TERMIO
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ioctl (fileno (stdout), TCFLSH, 1);
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#else /* not HAVE_TERMIO */
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ioctl (fileno (stdout), TIOCFLUSH, 0);
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#endif /* not HAVE_TERMIO */
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#ifdef TIOCGPGRP
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error ("Quit");
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#else
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error ("Quit (expect signal %d when inferior is resumed)", SIGINT);
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#endif /* TIOCGPGRP */
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}
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/* Control C comes here */
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void
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request_quit ()
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{
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quit_flag = 1;
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#ifdef USG
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/* Restore the signal handler. */
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signal (SIGINT, request_quit);
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#endif
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if (immediate_quit)
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quit ();
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}
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/* My replacement for the read system call.
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Used like `read' but keeps going if `read' returns too soon. */
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int
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myread (desc, addr, len)
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int desc;
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char *addr;
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int len;
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{
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register int val;
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int orglen = len;
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|
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while (len > 0)
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{
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val = read (desc, addr, len);
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if (val < 0)
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return val;
|
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if (val == 0)
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return orglen - len;
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len -= val;
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addr += val;
|
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}
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return orglen;
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}
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|
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/* Make a copy of the string at PTR with SIZE characters
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||
(and add a null character at the end in the copy).
|
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Uses malloc to get the space. Returns the address of the copy. */
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|
||
char *
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savestring (ptr, size)
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||
char *ptr;
|
||
int size;
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{
|
||
register char *p = (char *) xmalloc (size + 1);
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bcopy (ptr, p, size);
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p[size] = 0;
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return p;
|
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}
|
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|
||
/* The "const" is so it compiles under DGUX (which prototypes strsave
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in <string.h>. FIXME: This should be named "xstrsave", shouldn't it?
|
||
Doesn't real strsave return NULL if out of memory? */
|
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char *
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strsave (ptr)
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const char *ptr;
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||
{
|
||
return savestring (ptr, strlen (ptr));
|
||
}
|
||
|
||
char *
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||
concat (s1, s2, s3)
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char *s1, *s2, *s3;
|
||
{
|
||
register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
|
||
register char *val = (char *) xmalloc (len);
|
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strcpy (val, s1);
|
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strcat (val, s2);
|
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strcat (val, s3);
|
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return val;
|
||
}
|
||
|
||
void
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||
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 CH on STREAM as part of the contents
|
||
of a literal string whose delimiter is QUOTER. */
|
||
|
||
void
|
||
printchar (ch, stream, quoter)
|
||
unsigned char ch;
|
||
FILE *stream;
|
||
int quoter;
|
||
{
|
||
register int c = ch;
|
||
|
||
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)
|
||
char *linebuffer;
|
||
FILE *stream;
|
||
{
|
||
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;
|
||
{
|
||
#ifdef __STDC__
|
||
extern char *cplus_demangle (const char *, int);
|
||
#else
|
||
extern char *cplus_demangle ();
|
||
#endif
|
||
#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. */
|
||
|
||
#if !defined(MISSING_VPRINTF) || defined (vsprintf)
|
||
/* VARARGS */
|
||
void
|
||
vfprintf_filtered (stream, format, args)
|
||
va_list args;
|
||
#else
|
||
void fprintf_filtered (stream, format, arg1, arg2, arg3, arg4, arg5, arg6)
|
||
#endif
|
||
FILE *stream;
|
||
char *format;
|
||
{
|
||
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. */
|
||
#if !defined(MISSING_VPRINTF) || defined (vsprintf)
|
||
(void) vsprintf (linebuffer, format, args);
|
||
#else
|
||
(void) sprintf (linebuffer, format, arg1, arg2, arg3, arg4, arg5, arg6);
|
||
#endif
|
||
|
||
fputs_filtered (linebuffer, stream);
|
||
}
|
||
|
||
#if !defined(MISSING_VPRINTF) || defined (vsprintf)
|
||
/* VARARGS */
|
||
void
|
||
fprintf_filtered (va_alist)
|
||
va_dcl
|
||
{
|
||
va_list args;
|
||
FILE *stream;
|
||
char *format;
|
||
|
||
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. */
|
||
(void) 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 *);
|
||
|
||
(void) vfprintf_filtered (stdout, format, args);
|
||
va_end (args);
|
||
}
|
||
#else
|
||
void
|
||
printf_filtered (format, arg1, arg2, arg3, arg4, arg5, arg6)
|
||
char *format;
|
||
int arg1, arg2, arg3, arg4, arg5, arg6;
|
||
{
|
||
fprintf_filtered (stdout, format, arg1, arg2, arg3, arg4, arg5, arg6);
|
||
}
|
||
#endif
|
||
|
||
/* 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 = 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. */
|
||
char *cplus_demangle ();
|
||
|
||
/* 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 = 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);
|
||
}
|