/* General utility routines for GDB, the GNU debugger.
- Copyright 1986, 1989, 1990-1992, 1995, 1996, 1998, 2000, 2001
- Free Software Foundation, Inc.
+
+ Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
+ Foundation, Inc.
This file is part of GDB.
Boston, MA 02111-1307, USA. */
#include "defs.h"
+#include "gdb_assert.h"
#include <ctype.h>
#include "gdb_string.h"
#include "event-top.h"
-#ifdef HAVE_CURSES_H
-#include <curses.h>
-#endif
-#ifdef HAVE_TERM_H
-#include <term.h>
-#endif
-
#ifdef __GO32__
#include <pc.h>
#endif
#undef reg
#endif
-#include "signals.h"
+#include <signal.h>
#include "gdbcmd.h"
#include "serial.h"
#include "bfd.h"
#include "demangle.h"
#include "expression.h"
#include "language.h"
+#include "charset.h"
#include "annotate.h"
+#include "filenames.h"
-#include "inferior.h" /* for signed_pointer_to_address */
+#include "inferior.h" /* for signed_pointer_to_address */
+
+#include <sys/param.h> /* For MAXPATHLEN */
+
+#ifdef HAVE_CURSES_H
+#include <curses.h>
+#endif
+#ifdef HAVE_TERM_H
+#include <term.h>
+#endif
#include <readline/readline.h>
-#undef XMALLOC
-#define XMALLOC(TYPE) ((TYPE*) xmalloc (sizeof (TYPE)))
+#ifdef USE_MMALLOC
+#include "mmalloc.h"
+#endif
+
+#ifdef NEED_DECLARATION_MALLOC
+extern PTR malloc (); /* OK: PTR */
+#endif
+#ifdef NEED_DECLARATION_REALLOC
+extern PTR realloc (); /* OK: PTR */
+#endif
+#ifdef NEED_DECLARATION_FREE
+extern void free ();
+#endif
+/* Actually, we'll never have the decl, since we don't define _GNU_SOURCE. */
+#if defined(HAVE_CANONICALIZE_FILE_NAME) \
+ && defined(NEED_DECLARATION_CANONICALIZE_FILE_NAME)
+extern char *canonicalize_file_name (const char *);
+#endif
/* readline defines this. */
#undef savestring
static struct cleanup *run_cleanup_chain; /* cleaned up on each 'run' */
static struct cleanup *exec_cleanup_chain; /* cleaned up on each execution command */
/* cleaned up on each error from within an execution command */
-static struct cleanup *exec_error_cleanup_chain;
+static struct cleanup *exec_error_cleanup_chain;
/* Pointer to what is left to do for an execution command after the
target stops. Used only in asynchronous mode, by targets that
int immediate_quit;
-/* Nonzero means that encoded C++ names should be printed out in their
- C++ form rather than raw. */
+/* Nonzero means that encoded C++/ObjC names should be printed out in their
+ C++/ObjC 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
+/* Nonzero means that encoded C++/ObjC names should be printed out in their
+ C++/ObjC 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;
static void
do_close_cleanup (void *arg)
{
- close ((int) arg);
+ int *fd = arg;
+ close (*fd);
+ xfree (fd);
}
struct cleanup *
make_cleanup_close (int fd)
{
- /* int into void*. Outch!! */
- return make_cleanup (do_close_cleanup, (void *) fd);
+ int *saved_fd = xmalloc (sizeof (fd));
+ *saved_fd = fd;
+ return make_cleanup (do_close_cleanup, saved_fd);
}
static void
void *arg)
{
register struct cleanup *new
- = (struct cleanup *) xmalloc (sizeof (struct cleanup));
+ = (struct cleanup *) xmalloc (sizeof (struct cleanup));
register struct cleanup *old_chain = *pmy_chain;
new->next = *pmy_chain;
{
void **location = ptr;
if (location == NULL)
- internal_error ("free_current_contents: NULL pointer");
+ internal_error (__FILE__, __LINE__,
+ "free_current_contents: NULL pointer");
if (*location != NULL)
{
xfree (*location);
{
struct continuation *continuation_ptr;
- continuation_ptr = (struct continuation *) xmalloc (sizeof (struct continuation));
+ continuation_ptr =
+ (struct continuation *) xmalloc (sizeof (struct continuation));
continuation_ptr->continuation_hook = continuation_hook;
continuation_ptr->arg_list = arg_list;
continuation_ptr->next = cmd_continuation;
/* Work now on the list we have set aside. */
while (continuation_ptr)
- {
- (continuation_ptr->continuation_hook) (continuation_ptr->arg_list);
- saved_continuation = continuation_ptr;
- continuation_ptr = continuation_ptr->next;
- xfree (saved_continuation);
- }
+ {
+ (continuation_ptr->continuation_hook) (continuation_ptr->arg_list);
+ saved_continuation = continuation_ptr;
+ continuation_ptr = continuation_ptr->next;
+ xfree (saved_continuation);
+ }
}
/* Walk down the cmd_continuation list, and get rid of all the
{
struct continuation *continuation_ptr;
- continuation_ptr = (struct continuation *) xmalloc (sizeof (struct continuation));
+ continuation_ptr =
+ (struct continuation *) xmalloc (sizeof (struct continuation));
continuation_ptr->continuation_hook = continuation_hook;
continuation_ptr->arg_list = arg_list;
continuation_ptr->next = intermediate_continuation;
/* Work now on the list we have set aside. */
while (continuation_ptr)
- {
- (continuation_ptr->continuation_hook) (continuation_ptr->arg_list);
- saved_continuation = continuation_ptr;
- continuation_ptr = continuation_ptr->next;
- xfree (saved_continuation);
- }
+ {
+ (continuation_ptr->continuation_hook) (continuation_ptr->arg_list);
+ saved_continuation = continuation_ptr;
+ continuation_ptr = continuation_ptr->next;
+ xfree (saved_continuation);
+ }
}
/* Walk down the cmd_continuation list, and get rid of all the
xfree (continuation_ptr);
}
}
-
\f
-/* Print a warning message. Way to use this is to call warning_begin,
- output the warning message (use unfiltered output to gdb_stderr),
- ending in a newline. There is not currently a warning_end that you
- call afterwards, but such a thing might be added if it is useful
- for a GUI to separate warning messages from other output.
- FIXME: Why do warnings use unfiltered output and errors filtered?
- Is this anything other than a historical accident? */
+/* Print a warning message. The first argument STRING is the warning
+ message, used as an fprintf format string, the second is the
+ va_list of arguments for that string. A warning is unfiltered (not
+ paginated) so that the user does not need to page through each
+ screen full of warnings when there are lots of them. */
void
-warning_begin (void)
+vwarning (const char *string, va_list args)
{
- target_terminal_ours ();
- wrap_here (""); /* Force out any buffered output */
- gdb_flush (gdb_stdout);
- if (warning_pre_print)
- fprintf_unfiltered (gdb_stderr, warning_pre_print);
-}
-
-/* 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. */
-
-void
-warning (const char *string,...)
-{
- va_list args;
- va_start (args, string);
if (warning_hook)
(*warning_hook) (string, args);
else
{
- warning_begin ();
+ target_terminal_ours ();
+ wrap_here (""); /* Force out any buffered output */
+ gdb_flush (gdb_stdout);
+ if (warning_pre_print)
+ fprintf_unfiltered (gdb_stderr, warning_pre_print);
vfprintf_unfiltered (gdb_stderr, string, args);
fprintf_unfiltered (gdb_stderr, "\n");
va_end (args);
}
}
-/* Start the printing of an error message. Way to use this is to call
- this, output the error message (use filtered output to gdb_stderr
- (FIXME: Some callers, like memory_error, use gdb_stdout)), ending
- in a newline, and then call return_to_top_level (RETURN_ERROR).
- error() provides a convenient way to do this for the special case
- that the error message can be formatted with a single printf call,
- but this is more general. */
+/* 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. */
+
void
-error_begin (void)
+warning (const char *string, ...)
{
- if (error_begin_hook)
- error_begin_hook ();
-
- target_terminal_ours ();
- wrap_here (""); /* Force out any buffered output */
- gdb_flush (gdb_stdout);
-
- annotate_error_begin ();
-
- if (error_pre_print)
- fprintf_filtered (gdb_stderr, error_pre_print);
+ va_list args;
+ va_start (args, string);
+ vwarning (string, args);
+ va_end (args);
}
/* Print an error message and return to command level.
NORETURN void
verror (const char *string, va_list args)
{
- char *err_string;
- struct cleanup *err_string_cleanup;
- /* FIXME: cagney/1999-11-10: All error calls should come here.
- Unfortunately some code uses the sequence: error_begin(); print
- error message; return_to_top_level. That code should be
- flushed. */
- error_begin ();
- /* NOTE: It's tempting to just do the following...
- vfprintf_filtered (gdb_stderr, string, args);
- and then follow with a similar looking statement to cause the message
- to also go to gdb_lasterr. But if we do this, we'll be traversing the
- va_list twice which works on some platforms and fails miserably on
- others. */
- /* Save it as the last error */
- ui_file_rewind (gdb_lasterr);
- vfprintf_filtered (gdb_lasterr, string, args);
- /* Retrieve the last error and print it to gdb_stderr */
- err_string = error_last_message ();
- err_string_cleanup = make_cleanup (xfree, err_string);
- fputs_filtered (err_string, gdb_stderr);
- fprintf_filtered (gdb_stderr, "\n");
- do_cleanups (err_string_cleanup);
- return_to_top_level (RETURN_ERROR);
+ struct ui_file *tmp_stream = mem_fileopen ();
+ make_cleanup_ui_file_delete (tmp_stream);
+ vfprintf_unfiltered (tmp_stream, string, args);
+ error_stream (tmp_stream);
}
NORETURN void
-error (const char *string,...)
+error (const char *string, ...)
{
va_list args;
va_start (args, string);
va_end (args);
}
+static void
+do_write (void *data, const char *buffer, long length_buffer)
+{
+ ui_file_write (data, buffer, length_buffer);
+}
+
NORETURN void
error_stream (struct ui_file *stream)
{
- long size;
- char *msg = ui_file_xstrdup (stream, &size);
- make_cleanup (xfree, msg);
- error ("%s", msg);
+ if (error_begin_hook)
+ error_begin_hook ();
+
+ /* Copy the stream into the GDB_LASTERR buffer. */
+ ui_file_rewind (gdb_lasterr);
+ ui_file_put (stream, do_write, gdb_lasterr);
+
+ /* Write the message plus any error_pre_print to gdb_stderr. */
+ target_terminal_ours ();
+ wrap_here (""); /* Force out any buffered output */
+ gdb_flush (gdb_stdout);
+ annotate_error_begin ();
+ if (error_pre_print)
+ fprintf_filtered (gdb_stderr, error_pre_print);
+ ui_file_put (stream, do_write, gdb_stderr);
+ fprintf_filtered (gdb_stderr, "\n");
+
+ throw_exception (RETURN_ERROR);
}
/* Get the last error message issued by gdb */
long len;
return ui_file_xstrdup (gdb_lasterr, &len);
}
-
+
/* This is to be called by main() at the very beginning */
void
gdb_lasterr = mem_fileopen ();
}
-/* Print a message reporting an internal error. Ask the user if they
- want to continue, dump core, or just exit. */
+/* Print a message reporting an internal error/warning. Ask the user
+ if they want to continue, dump core, or just exit. Return
+ something to indicate a quit. */
-NORETURN void
-internal_verror (const char *fmt, va_list ap)
+struct internal_problem
{
- static char msg[] = "Internal GDB error: recursive internal error.\n";
- static int dejavu = 0;
- int continue_p;
+ const char *name;
+ /* FIXME: cagney/2002-08-15: There should be ``maint set/show''
+ commands available for controlling these variables. */
+ enum auto_boolean should_quit;
+ enum auto_boolean should_dump_core;
+};
+
+/* Report a problem, internal to GDB, to the user. Once the problem
+ has been reported, and assuming GDB didn't quit, the caller can
+ either allow execution to resume or throw an error. */
+
+static void
+internal_vproblem (struct internal_problem *problem,
+ const char *file, int line, const char *fmt, va_list ap)
+{
+ static char msg[] = "Recursive internal problem.\n";
+ static int dejavu;
+ int quit_p;
int dump_core_p;
- /* don't allow infinite error recursion. */
+ /* Don't allow infinite error/warning recursion. */
switch (dejavu)
{
case 0:
case 1:
dejavu = 2;
fputs_unfiltered (msg, gdb_stderr);
- abort ();
+ abort (); /* NOTE: GDB has only three calls to abort(). */
default:
dejavu = 3;
write (STDERR_FILENO, msg, sizeof (msg));
exit (1);
}
- /* Try to get the message out */
+ /* Try to get the message out and at the start of a new line. */
target_terminal_ours ();
- fputs_unfiltered ("gdb-internal-error: ", gdb_stderr);
+ begin_line ();
+
+ /* The error/warning message. Format using a style similar to a
+ compiler error message. */
+ fprintf_unfiltered (gdb_stderr, "%s:%d: %s: ", file, line, problem->name);
vfprintf_unfiltered (gdb_stderr, fmt, ap);
fputs_unfiltered ("\n", gdb_stderr);
- /* Default (no case) is to quit GDB. When in batch mode this
- lessens the likelhood of GDB going into an infinate loop. */
- continue_p = query ("\
-An internal GDB error was detected. This may make further\n\
-debugging unreliable. Continue this debugging session? ");
+ /* Provide more details so that the user knows that they are living
+ on the edge. */
+ fprintf_unfiltered (gdb_stderr, "\
+A problem internal to GDB has been detected. Further\n\
+debugging may prove unreliable.\n");
+
+ switch (problem->should_quit)
+ {
+ case AUTO_BOOLEAN_AUTO:
+ /* Default (yes/batch case) is to quit GDB. When in batch mode
+ this lessens the likelhood of GDB going into an infinate
+ loop. */
+ quit_p = query ("Quit this debugging session? ");
+ break;
+ case AUTO_BOOLEAN_TRUE:
+ quit_p = 1;
+ break;
+ case AUTO_BOOLEAN_FALSE:
+ quit_p = 0;
+ break;
+ default:
+ internal_error (__FILE__, __LINE__, "bad switch");
+ }
- /* Default (no case) is to not dump core. Lessen the chance of GDB
- leaving random core files around. */
- dump_core_p = query ("\
-Create a core file containing the current state of GDB? ");
+ switch (problem->should_dump_core)
+ {
+ case AUTO_BOOLEAN_AUTO:
+ /* Default (yes/batch case) is to dump core. This leaves a GDB
+ `dropping' so that it is easier to see that something went
+ wrong in GDB. */
+ dump_core_p = query ("Create a core file of GDB? ");
+ break;
+ break;
+ case AUTO_BOOLEAN_TRUE:
+ dump_core_p = 1;
+ break;
+ case AUTO_BOOLEAN_FALSE:
+ dump_core_p = 0;
+ break;
+ default:
+ internal_error (__FILE__, __LINE__, "bad switch");
+ }
- if (continue_p)
+ if (quit_p)
{
if (dump_core_p)
- {
- if (fork () == 0)
- abort ();
- }
+ abort (); /* NOTE: GDB has only three calls to abort(). */
+ else
+ exit (1);
}
else
{
if (dump_core_p)
- abort ();
- else
- exit (1);
+ {
+ if (fork () == 0)
+ abort (); /* NOTE: GDB has only three calls to abort(). */
+ }
}
dejavu = 0;
- return_to_top_level (RETURN_ERROR);
}
+static struct internal_problem internal_error_problem = {
+ "internal-error", AUTO_BOOLEAN_AUTO, AUTO_BOOLEAN_AUTO
+};
+
NORETURN void
-internal_error (char *string, ...)
+internal_verror (const char *file, int line, const char *fmt, va_list ap)
+{
+ internal_vproblem (&internal_error_problem, file, line, fmt, ap);
+ throw_exception (RETURN_ERROR);
+}
+
+NORETURN void
+internal_error (const char *file, int line, const char *string, ...)
{
va_list ap;
va_start (ap, string);
+ internal_verror (file, line, string, ap);
+ va_end (ap);
+}
+
+static struct internal_problem internal_warning_problem = {
+ "internal-error", AUTO_BOOLEAN_AUTO, AUTO_BOOLEAN_AUTO
+};
- internal_verror (string, ap);
+void
+internal_vwarning (const char *file, int line, const char *fmt, va_list ap)
+{
+ internal_vproblem (&internal_warning_problem, file, line, fmt, ap);
+}
+
+void
+internal_warning (const char *file, int line, const char *string, ...)
+{
+ va_list ap;
+ va_start (ap, string);
+ internal_vwarning (file, line, string, ap);
va_end (ap);
}
char *msg;
static char buf[32];
- if ((msg = strerror (errnum)) == NULL)
+ msg = strerror (errnum);
+ if (msg == NULL)
{
sprintf (buf, "(undocumented errno %d)", errnum);
msg = buf;
Then return to command level. */
NORETURN void
-perror_with_name (char *string)
+perror_with_name (const char *string)
{
char *err;
char *combined;
as the file name for which the error was encountered. */
void
-print_sys_errmsg (char *string, int errcode)
+print_sys_errmsg (const char *string, int errcode)
{
char *err;
char *combined;
void
quit (void)
{
- serial_t gdb_stdout_serial = serial_fdopen (1);
+ struct serial *gdb_stdout_serial = serial_fdopen (1);
target_terminal_ours ();
gdb_flush (gdb_stderr);
/* 3. The system-level buffer. */
- SERIAL_DRAIN_OUTPUT (gdb_stdout_serial);
- SERIAL_UN_FDOPEN (gdb_stdout_serial);
+ serial_drain_output (gdb_stdout_serial);
+ serial_un_fdopen (gdb_stdout_serial);
annotate_error_begin ();
fprintf_unfiltered (gdb_stderr, "Quit\n");
#else
if (job_control
- /* If there is no terminal switching for this target, then we can't
- possibly get screwed by the lack of job control. */
+ /* If there is no terminal switching for this target, then we can't
+ possibly get screwed by the lack of job control. */
|| current_target.to_terminal_ours == NULL)
fprintf_unfiltered (gdb_stderr, "Quit\n");
else
fprintf_unfiltered (gdb_stderr,
- "Quit (expect signal SIGINT when the program is resumed)\n");
+ "Quit (expect signal SIGINT when the program is resumed)\n");
#endif
- return_to_top_level (RETURN_QUIT);
+ throw_exception (RETURN_QUIT);
}
-
-#if defined(_MSC_VER) /* should test for wingdb instead? */
-
-/*
- * Windows translates all keyboard and mouse events
- * into a message which is appended to the message
- * queue for the process.
- */
-
-void
-notice_quit (void)
-{
- int k = win32pollquit ();
- if (k == 1)
- quit_flag = 1;
- else if (k == 2)
- immediate_quit = 1;
-}
-
-#else /* !defined(_MSC_VER) */
-
-void
-notice_quit (void)
-{
- /* Done by signals */
-}
-
-#endif /* !defined(_MSC_VER) */
-
/* Control C comes here */
void
request_quit (int signo)
\f
/* Memory management stuff (malloc friends). */
-/* Make a substitute size_t for non-ANSI compilers. */
-
-#ifndef HAVE_STDDEF_H
-#ifndef size_t
-#define size_t unsigned int
-#endif
-#endif
-
#if !defined (USE_MMALLOC)
-PTR
-mcalloc (PTR md, size_t number, size_t size)
+static void *
+mmalloc (void *md, size_t size)
{
- return calloc (number, size);
+ return malloc (size); /* NOTE: GDB's only call to malloc() */
}
-PTR
-mmalloc (PTR md, size_t size)
+static void *
+mrealloc (void *md, void *ptr, size_t size)
{
- return malloc (size);
+ if (ptr == 0) /* Guard against old realloc's */
+ return mmalloc (md, size);
+ else
+ return realloc (ptr, size); /* NOTE: GDB's only call to ralloc() */
}
-PTR
-mrealloc (PTR md, PTR ptr, size_t size)
+static void *
+mcalloc (void *md, size_t number, size_t size)
{
- if (ptr == 0) /* Guard against old realloc's */
- return malloc (size);
- else
- return realloc (ptr, size);
+ return calloc (number, size); /* NOTE: GDB's only call to calloc() */
}
-void
-mfree (PTR md, PTR ptr)
+static void
+mfree (void *md, void *ptr)
{
- xfree (ptr);
+ free (ptr); /* NOTE: GDB's only call to free() */
}
#endif /* USE_MMALLOC */
malloc_botch (void)
{
fprintf_unfiltered (gdb_stderr, "Memory corruption\n");
- abort ();
+ internal_error (__FILE__, __LINE__, "failed internal consistency check");
}
/* Attempt to install hooks in mmalloc/mrealloc/mfree for the heap specified
initialize_all_files(). */
fprintf_unfiltered
- (gdb_stderr, "warning: failed to install memory consistency checks; ");
- fprintf_unfiltered
- (gdb_stderr, "configuration should define NO_MMCHECK or MMCHECK_FORCE\n");
+ (gdb_stderr,
+ "warning: failed to install memory consistency checks; ");
+ fprintf_unfiltered (gdb_stderr,
+ "configuration should define NO_MMCHECK or MMCHECK_FORCE\n");
}
mmtrace ();
{
if (size > 0)
{
- internal_error ("virtual memory exhausted: can't allocate %ld bytes.", size);
+ internal_error (__FILE__, __LINE__,
+ "virtual memory exhausted: can't allocate %ld bytes.",
+ size);
}
else
{
- internal_error ("virtual memory exhausted.");
+ internal_error (__FILE__, __LINE__, "virtual memory exhausted.");
}
}
-/* Like mmalloc but get error if no storage available, and protect against
- the caller wanting to allocate zero bytes. Whether to return NULL for
- a zero byte request, or translate the request into a request for one
- byte of zero'd storage, is a religious issue. */
+/* The xmmalloc() family of memory management routines.
+
+ These are are like the mmalloc() family except that they implement
+ consistent semantics and guard against typical memory management
+ problems: if a malloc fails, an internal error is thrown; if
+ free(NULL) is called, it is ignored; if *alloc(0) is called, NULL
+ is returned.
-PTR
-xmmalloc (PTR md, long size)
+ All these routines are implemented using the mmalloc() family. */
+
+void *
+xmmalloc (void *md, size_t size)
{
- register PTR val;
+ void *val;
if (size == 0)
{
val = NULL;
}
- else if ((val = mmalloc (md, size)) == NULL)
+ else
{
- nomem (size);
+ val = mmalloc (md, size);
+ if (val == NULL)
+ nomem (size);
}
return (val);
}
-/* Like mrealloc but get error if no storage available. */
-
-PTR
-xmrealloc (PTR md, PTR ptr, long size)
+void *
+xmrealloc (void *md, void *ptr, size_t size)
{
- register PTR val;
+ void *val;
- if (ptr != NULL)
+ if (size == 0)
{
- val = mrealloc (md, ptr, size);
+ if (ptr != NULL)
+ mfree (md, ptr);
+ val = NULL;
}
else
{
- val = mmalloc (md, size);
- }
- if (val == NULL)
- {
- nomem (size);
+ if (ptr != NULL)
+ {
+ val = mrealloc (md, ptr, size);
+ }
+ else
+ {
+ val = mmalloc (md, size);
+ }
+ if (val == NULL)
+ {
+ nomem (size);
+ }
}
return (val);
}
-/* Like malloc but get error if no storage available, and protect against
- the caller wanting to allocate zero bytes. */
+void *
+xmcalloc (void *md, size_t number, size_t size)
+{
+ void *mem;
+ if (number == 0 || size == 0)
+ mem = NULL;
+ else
+ {
+ mem = mcalloc (md, number, size);
+ if (mem == NULL)
+ nomem (number * size);
+ }
+ return mem;
+}
-PTR
-xmalloc (size_t size)
+void
+xmfree (void *md, void *ptr)
{
- return (xmmalloc ((PTR) NULL, size));
+ if (ptr != NULL)
+ mfree (md, ptr);
}
-/* Like calloc but get error if no storage available */
+/* The xmalloc() (libiberty.h) family of memory management routines.
-PTR
-xcalloc (size_t number, size_t size)
+ These are like the ISO-C malloc() family except that they implement
+ consistent semantics and guard against typical memory management
+ problems. See xmmalloc() above for further information.
+
+ All these routines are wrappers to the xmmalloc() family. */
+
+/* NOTE: These are declared using PTR to ensure consistency with
+ "libiberty.h". xfree() is GDB local. */
+
+PTR /* OK: PTR */
+xmalloc (size_t size)
{
- void *mem = mcalloc (NULL, number, size);
- if (mem == NULL)
- nomem (number * size);
- return mem;
+ return xmmalloc (NULL, size);
}
-/* Like mrealloc but get error if no storage available. */
-
-PTR
-xrealloc (PTR ptr, size_t size)
+PTR /* OK: PTR */
+xrealloc (PTR ptr, size_t size) /* OK: PTR */
{
- return (xmrealloc ((PTR) NULL, ptr, size));
+ return xmrealloc (NULL, ptr, size);
}
-/* Free up space allocated by one of xmalloc(), xcalloc(), or
- xrealloc(). */
+PTR /* OK: PTR */
+xcalloc (size_t number, size_t size)
+{
+ return xmcalloc (NULL, number, size);
+}
void
xfree (void *ptr)
{
- if (ptr != NULL)
- free (ptr);
+ xmfree (NULL, ptr);
}
\f
/* NULL could be returned due to a memory allocation problem; a
badly format string; or something else. */
if ((*ret) == NULL)
- internal_error ("%s:%d: vasprintf returned NULL buffer (errno %d)",
- __FILE__, __LINE__, errno);
+ internal_error (__FILE__, __LINE__,
+ "vasprintf returned NULL buffer (errno %d)", errno);
/* A negative status with a non-NULL buffer shouldn't never
happen. But to be sure. */
if (status < 0)
- internal_error ("%s:%d: vasprintf call failed (errno %d)",
- __FILE__, __LINE__, errno);
+ internal_error (__FILE__, __LINE__,
+ "vasprintf call failed (errno %d)", errno);
}
Uses malloc to get the space. Returns the address of the copy. */
char *
-savestring (const char *ptr, int size)
+savestring (const char *ptr, size_t size)
{
register char *p = (char *) xmalloc (size + 1);
memcpy (p, ptr, size);
}
char *
-msavestring (void *md, const char *ptr, int size)
+msavestring (void *md, const char *ptr, size_t size)
{
register char *p = (char *) xmmalloc (md, size + 1);
memcpy (p, ptr, size);
/* VARARGS */
int
-query (char *ctlstr,...)
+query (const char *ctlstr, ...)
{
va_list args;
register int answer;
/* Automatically answer "yes" if input is not from a terminal. */
if (!input_from_terminal_p ())
return 1;
-#ifdef MPW
- /* FIXME Automatically answer "yes" if called from MacGDB. */
- if (mac_app)
- return 1;
-#endif /* MPW */
while (1)
{
if (annotation_level > 1)
printf_filtered ("\n\032\032query\n");
-#ifdef MPW
- /* If not in MacGDB, move to a new line so the entered line doesn't
- have a prompt on the front of it. */
- if (!mac_app)
- fputs_unfiltered ("\n", gdb_stdout);
-#endif /* MPW */
-
wrap_here ("");
gdb_flush (gdb_stdout);
-#if defined(TUI)
- if (!tui_version || cmdWin == tuiWinWithFocus ())
-#endif
- answer = fgetc (stdin);
-#if defined(TUI)
- else
- answer = (unsigned char) tuiBufferGetc ();
-
-#endif
+ answer = fgetc (stdin);
clearerr (stdin); /* in case of C-d */
if (answer == EOF) /* C-d */
{
break;
}
/* Eat rest of input line, to EOF or newline */
- if ((answer != '\n') || (tui_version && answer != '\r'))
+ if (answer != '\n')
do
{
-#if defined(TUI)
- if (!tui_version || cmdWin == tuiWinWithFocus ())
-#endif
- ans2 = fgetc (stdin);
-#if defined(TUI)
- else
- ans2 = (unsigned char) tuiBufferGetc ();
-#endif
+ ans2 = fgetc (stdin);
clearerr (stdin);
}
while (ans2 != EOF && ans2 != '\n' && ans2 != '\r');
- TUIDO (((TuiOpaqueFuncPtr) tui_vStartNewLines, 1));
if (answer >= 'a')
answer -= 040;
}
\f
+/* Print an error message saying that we couldn't make sense of a
+ \^mumble sequence in a string or character constant. START and END
+ indicate a substring of some larger string that contains the
+ erroneous backslash sequence, missing the initial backslash. */
+static NORETURN int
+no_control_char_error (const char *start, const char *end)
+{
+ int len = end - start;
+ char *copy = alloca (end - start + 1);
+
+ memcpy (copy, start, len);
+ copy[len] = '\0';
+
+ error ("There is no control character `\\%s' in the `%s' character set.",
+ copy, target_charset ());
+}
+
/* 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
int
parse_escape (char **string_ptr)
{
+ int target_char;
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':
+ if (c_parse_backslash (c, &target_char))
+ return target_char;
+ else
+ switch (c)
{
- 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;
+ case '\n':
+ return -2;
+ case 0:
+ (*string_ptr)--;
+ return 0;
+ case '^':
+ {
+ /* Remember where this escape sequence started, for reporting
+ errors. */
+ char *sequence_start_pos = *string_ptr - 1;
+
+ c = *(*string_ptr)++;
+
+ if (c == '?')
+ {
+ /* XXXCHARSET: What is `delete' in the host character set? */
+ c = 0177;
+
+ if (!host_char_to_target (c, &target_char))
+ error ("There is no character corresponding to `Delete' "
+ "in the target character set `%s'.", host_charset ());
+
+ return target_char;
+ }
+ else if (c == '\\')
+ target_char = parse_escape (string_ptr);
+ else
+ {
+ if (!host_char_to_target (c, &target_char))
+ no_control_char_error (sequence_start_pos, *string_ptr);
+ }
+
+ /* Now target_char is something like `c', and we want to find
+ its control-character equivalent. */
+ if (!target_char_to_control_char (target_char, &target_char))
+ no_control_char_error (sequence_start_pos, *string_ptr);
+
+ return target_char;
+ }
+
+ /* XXXCHARSET: we need to use isdigit and value-of-digit
+ methods of the host character set here. */
+
+ 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)
+ {
+ c = (**string_ptr);
+ if (c >= '0' && c <= '7')
+ {
+ (*string_ptr)++;
+ i *= 8;
+ i += c - '0';
+ }
+ else
+ {
+ break;
+ }
+ }
+ return i;
+ }
+ default:
+ if (!host_char_to_target (c, &target_char))
+ error
+ ("The escape sequence `\%c' is equivalent to plain `%c', which"
+ " has no equivalent\n" "in the `%s' character set.", c, c,
+ target_charset ());
+ return target_char;
}
- default:
- return c;
- }
}
\f
/* Print the character C on STREAM as part of the contents of a literal
}
void
-fputstrn_unfiltered (const char *str, int n, int quoter, struct ui_file *stream)
+fputstrn_unfiltered (const char *str, int n, int quoter,
+ struct ui_file *stream)
{
int i;
for (i = 0; i < n; i++)
printchar (str[i], fputs_unfiltered, fprintf_unfiltered, stream, quoter);
}
-
\f
+
/* Number of lines per page or UINT_MAX if paging is disabled. */
static unsigned int lines_per_page;
/* Number of chars per line or UINT_MAX if line folding is disabled. */
init_page_info (void)
{
#if defined(TUI)
- if (tui_version && m_winPtrNotNull (cmdWin))
- {
- lines_per_page = cmdWin->generic.height;
- chars_per_line = cmdWin->generic.width;
- }
- else
+ if (!tui_get_command_dimension (&chars_per_line, &lines_per_page))
#endif
{
/* These defaults will be used if we are unable to get the correct
lines_per_page = 24;
chars_per_line = 80;
-#if !defined (MPW) && !defined (_WIN32)
- /* No termcap under MPW, although might be cool to do something
- by looking at worksheet or console window sizes. */
+#if !defined (_WIN32)
/* Initialize the screen height and width from termcap. */
{
char *termtype = getenv ("TERM");
}
}
}
-#endif /* MPW */
+#endif
#if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
/* Call readline, not gdb_readline, because GO32 readline handles control-C
whereas control-C to gdb_readline will cause the user to get dumped
out to DOS. */
- ignore = readline (cont_prompt);
+ ignore = gdb_readline_wrapper (cont_prompt);
if (annotation_level > 1)
printf_unfiltered ("\n\032\032post-prompt-for-continue\n");
{
/* This should have been allocated, but be paranoid anyway. */
if (!wrap_buffer)
- abort ();
+ internal_error (__FILE__, __LINE__, "failed internal consistency check");
if (wrap_buffer[0])
{
}
}
+/* Print input string to gdb_stdout, filtered, with wrap,
+ arranging strings in columns of n chars. String can be
+ right or left justified in the column. Never prints
+ trailing spaces. String should never be longer than
+ width. FIXME: this could be useful for the EXAMINE
+ command, which currently doesn't tabulate very well */
+
+void
+puts_filtered_tabular (char *string, int width, int right)
+{
+ int spaces = 0;
+ int stringlen;
+ char *spacebuf;
+
+ gdb_assert (chars_per_line > 0);
+ if (chars_per_line == UINT_MAX)
+ {
+ fputs_filtered (string, gdb_stdout);
+ fputs_filtered ("\n", gdb_stdout);
+ return;
+ }
+
+ if (((chars_printed - 1) / width + 2) * width >= chars_per_line)
+ fputs_filtered ("\n", gdb_stdout);
+
+ if (width >= chars_per_line)
+ width = chars_per_line - 1;
+
+ stringlen = strlen (string);
+
+ if (chars_printed > 0)
+ spaces = width - (chars_printed - 1) % width - 1;
+ if (right)
+ spaces += width - stringlen;
+
+ spacebuf = alloca (spaces + 1);
+ spacebuf[spaces] = '\0';
+ while (spaces--)
+ spacebuf[spaces] = ' ';
+
+ fputs_filtered (spacebuf, gdb_stdout);
+ fputs_filtered (string, gdb_stdout);
+}
+
+
/* Ensure that whatever gets printed next, using the filtered output
commands, starts at the beginning of the line. I.E. if there is
any pending output for the current line, flush it and start a new
while (*lineptr)
{
/* Possible new page. */
- if (filter &&
- (lines_printed >= lines_per_page - 1))
+ if (filter && (lines_printed >= lines_per_page - 1))
prompt_for_continue ();
while (*lineptr && *lineptr != '\n')
if (wrap_column)
{
fputs_unfiltered (wrap_indent, stream);
- *wrap_pointer = '\0'; /* Null-terminate saved stuff */
+ *wrap_pointer = '\0'; /* Null-terminate saved stuff */
fputs_unfiltered (wrap_buffer, stream); /* and eject it */
/* FIXME, this strlen is what prevents wrap_indent from
containing tabs. However, if we recurse to print it
}
void
-fprintf_filtered (struct ui_file * stream, const char *format,...)
+fprintf_filtered (struct ui_file *stream, const char *format, ...)
{
va_list args;
va_start (args, format);
}
void
-fprintf_unfiltered (struct ui_file * stream, const char *format,...)
+fprintf_unfiltered (struct ui_file *stream, const char *format, ...)
{
va_list args;
va_start (args, format);
Called as fprintfi_filtered (spaces, stream, format, ...); */
void
-fprintfi_filtered (int spaces, struct ui_file * stream, const char *format,...)
+fprintfi_filtered (int spaces, struct ui_file *stream, const char *format,
+ ...)
{
va_list args;
va_start (args, format);
void
-printf_filtered (const char *format,...)
+printf_filtered (const char *format, ...)
{
va_list args;
va_start (args, format);
void
-printf_unfiltered (const char *format,...)
+printf_unfiltered (const char *format, ...)
{
va_list args;
va_start (args, format);
Called as printfi_filtered (spaces, format, ...); */
void
-printfi_filtered (int spaces, const char *format,...)
+printfi_filtered (int spaces, const char *format, ...)
{
va_list args;
va_start (args, format);
fputs_filtered (n_spaces (n), stream);
}
\f
-/* C++ demangler stuff. */
+/* C++/ObjC demangler stuff. */
/* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
demangling is off, the name is printed in its "raw" form. */
void
-fprintf_symbol_filtered (struct ui_file *stream, char *name, enum language lang,
- int arg_mode)
+fprintf_symbol_filtered (struct ui_file *stream, char *name,
+ enum language lang, int arg_mode)
{
char *demangled;
}
else
{
- switch (lang)
- {
- case language_cplus:
- demangled = cplus_demangle (name, arg_mode);
- break;
- case language_java:
- demangled = cplus_demangle (name, arg_mode | DMGL_JAVA);
- break;
- case language_chill:
- demangled = chill_demangle (name);
- break;
- default:
- demangled = NULL;
- break;
- }
+ demangled = language_demangle (language_def (lang), name, arg_mode);
fputs_filtered (demangled ? demangled : name, stream);
if (demangled != NULL)
{
}
return (*string1 != '\0' && *string1 != '(') || (*string2 != '\0');
}
+
+/* This is like strcmp except that it ignores whitespace and treats
+ '(' as the first non-NULL character in terms of ordering. Like
+ strcmp (and unlike strcmp_iw), it returns negative if STRING1 <
+ STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2
+ according to that ordering.
+
+ If a list is sorted according to this function and if you want to
+ find names in the list that match some fixed NAME according to
+ strcmp_iw(LIST_ELT, NAME), then the place to start looking is right
+ where this function would put NAME.
+
+ Here are some examples of why using strcmp to sort is a bad idea:
+
+ Whitespace example:
+
+ Say your partial symtab contains: "foo<char *>", "goo". Then, if
+ we try to do a search for "foo<char*>", strcmp will locate this
+ after "foo<char *>" and before "goo". Then lookup_partial_symbol
+ will start looking at strings beginning with "goo", and will never
+ see the correct match of "foo<char *>".
+
+ Parenthesis example:
+
+ In practice, this is less like to be an issue, but I'll give it a
+ shot. Let's assume that '$' is a legitimate character to occur in
+ symbols. (Which may well even be the case on some systems.) Then
+ say that the partial symbol table contains "foo$" and "foo(int)".
+ strcmp will put them in this order, since '$' < '('. Now, if the
+ user searches for "foo", then strcmp will sort "foo" before "foo$".
+ Then lookup_partial_symbol will notice that strcmp_iw("foo$",
+ "foo") is false, so it won't proceed to the actual match of
+ "foo(int)" with "foo". */
+
+int
+strcmp_iw_ordered (const char *string1, const char *string2)
+{
+ while ((*string1 != '\0') && (*string2 != '\0'))
+ {
+ while (isspace (*string1))
+ {
+ string1++;
+ }
+ while (isspace (*string2))
+ {
+ string2++;
+ }
+ if (*string1 != *string2)
+ {
+ break;
+ }
+ if (*string1 != '\0')
+ {
+ string1++;
+ string2++;
+ }
+ }
+
+ switch (*string1)
+ {
+ /* Characters are non-equal unless they're both '\0'; we want to
+ make sure we get the comparison right according to our
+ comparison in the cases where one of them is '\0' or '('. */
+ case '\0':
+ if (*string2 == '\0')
+ return 0;
+ else
+ return -1;
+ case '(':
+ if (*string2 == '\0')
+ return 1;
+ else
+ return -1;
+ default:
+ if (*string2 == '(')
+ return 1;
+ else
+ return *string1 - *string2;
+ }
+}
+
+/* A simple comparison function with opposite semantics to strcmp. */
+
+int
+streq (const char *lhs, const char *rhs)
+{
+ return !strcmp (lhs, rhs);
+}
\f
/*
subset_compare (char *string_to_compare, char *template_string)
{
int match;
- if (template_string != (char *) NULL && string_to_compare != (char *) NULL &&
- strlen (string_to_compare) <= strlen (template_string))
- match = (strncmp (template_string,
- string_to_compare,
- strlen (string_to_compare)) == 0);
+ if (template_string != (char *) NULL && string_to_compare != (char *) NULL
+ && strlen (string_to_compare) <= strlen (template_string))
+ match =
+ (strncmp
+ (template_string, string_to_compare, strlen (string_to_compare)) == 0);
else
match = 0;
return match;
"Set number of characters gdb thinks are in a line.",
&setlist);
add_show_from_set (c, &showlist);
- c->function.sfunc = set_width_command;
+ set_cmd_sfunc (c, set_width_command);
add_show_from_set
(add_set_cmd ("height", class_support,
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);
+ "Set demangling of encoded C++/ObjC names when displaying symbols.",
+ &setprintlist), &showprintlist);
add_show_from_set
(add_set_cmd ("pagination", class_support,
var_boolean, (char *) &pagination_enabled,
- "Set state of pagination.", &setlist),
- &showlist);
+ "Set state of pagination.", &setlist), &showlist);
if (xdb_commands)
{
(add_set_cmd ("sevenbit-strings", class_support, var_boolean,
(char *) &sevenbit_strings,
"Set printing of 8-bit characters in strings as \\nnn.",
- &setprintlist),
- &showprintlist);
+ &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);
+ "Set demangling of C++/ObjC names in disassembly listings.",
+ &setprintlist), &showprintlist);
}
/* Machine specific function to handle SIGWINCH signal. */
#ifdef SIGWINCH_HANDLER_BODY
SIGWINCH_HANDLER_BODY
#endif
-\f
-/* Support for converting target fp numbers into host DOUBLEST format. */
-
-/* XXX - This code should really be in libiberty/floatformat.c, however
- configuration issues with libiberty made this very difficult to do in the
- available time. */
-
-#include "floatformat.h"
-#include <math.h> /* ldexp */
-
-/* The odds that CHAR_BIT will be anything but 8 are low enough that I'm not
- going to bother with trying to muck around with whether it is defined in
- a system header, what we do if not, etc. */
-#define FLOATFORMAT_CHAR_BIT 8
-
-static unsigned long get_field (unsigned char *,
- enum floatformat_byteorders,
- unsigned int, unsigned int, unsigned int);
-
-/* Extract a field which starts at START and is LEN bytes long. DATA and
- TOTAL_LEN are the thing we are extracting it from, in byteorder ORDER. */
-static unsigned long
-get_field (unsigned char *data, enum floatformat_byteorders order,
- unsigned int total_len, unsigned int start, unsigned int len)
-{
- unsigned long result;
- unsigned int cur_byte;
- int cur_bitshift;
-
- /* Start at the least significant part of the field. */
- if (order == floatformat_little || order == floatformat_littlebyte_bigword)
- {
- /* We start counting from the other end (i.e, from the high bytes
- rather than the low bytes). As such, we need to be concerned
- with what happens if bit 0 doesn't start on a byte boundary.
- I.e, we need to properly handle the case where total_len is
- not evenly divisible by 8. So we compute ``excess'' which
- represents the number of bits from the end of our starting
- byte needed to get to bit 0. */
- int excess = FLOATFORMAT_CHAR_BIT - (total_len % FLOATFORMAT_CHAR_BIT);
- cur_byte = (total_len / FLOATFORMAT_CHAR_BIT)
- - ((start + len + excess) / FLOATFORMAT_CHAR_BIT);
- cur_bitshift = ((start + len + excess) % FLOATFORMAT_CHAR_BIT)
- - FLOATFORMAT_CHAR_BIT;
- }
- else
- {
- cur_byte = (start + len) / FLOATFORMAT_CHAR_BIT;
- cur_bitshift =
- ((start + len) % FLOATFORMAT_CHAR_BIT) - FLOATFORMAT_CHAR_BIT;
- }
- if (cur_bitshift > -FLOATFORMAT_CHAR_BIT)
- result = *(data + cur_byte) >> (-cur_bitshift);
- else
- result = 0;
- cur_bitshift += FLOATFORMAT_CHAR_BIT;
- if (order == floatformat_little || order == floatformat_littlebyte_bigword)
- ++cur_byte;
- else
- --cur_byte;
-
- /* Move towards the most significant part of the field. */
- while (cur_bitshift < len)
- {
- result |= (unsigned long)*(data + cur_byte) << cur_bitshift;
- cur_bitshift += FLOATFORMAT_CHAR_BIT;
- if (order == floatformat_little || order == floatformat_littlebyte_bigword)
- ++cur_byte;
- else
- --cur_byte;
- }
- if (len < sizeof(result) * FLOATFORMAT_CHAR_BIT)
- /* Mask out bits which are not part of the field */
- result &= ((1UL << len) - 1);
- return result;
-}
-
-/* Convert from FMT to a DOUBLEST.
- FROM is the address of the extended float.
- Store the DOUBLEST in *TO. */
-
-void
-floatformat_to_doublest (const struct floatformat *fmt, char *from,
- DOUBLEST *to)
-{
- unsigned char *ufrom = (unsigned char *) from;
- DOUBLEST dto;
- long exponent;
- unsigned long mant;
- unsigned int mant_bits, mant_off;
- int mant_bits_left;
- int special_exponent; /* It's a NaN, denorm or zero */
-
- /* If the mantissa bits are not contiguous from one end of the
- mantissa to the other, we need to make a private copy of the
- source bytes that is in the right order since the unpacking
- algorithm assumes that the bits are contiguous.
-
- Swap the bytes individually rather than accessing them through
- "long *" since we have no guarantee that they start on a long
- alignment, and also sizeof(long) for the host could be different
- than sizeof(long) for the target. FIXME: Assumes sizeof(long)
- for the target is 4. */
-
- if (fmt->byteorder == floatformat_littlebyte_bigword)
- {
- static unsigned char *newfrom;
- unsigned char *swapin, *swapout;
- int longswaps;
-
- longswaps = fmt->totalsize / FLOATFORMAT_CHAR_BIT;
- longswaps >>= 3;
-
- if (newfrom == NULL)
- {
- newfrom = (unsigned char *) xmalloc (fmt->totalsize);
- }
- swapout = newfrom;
- swapin = ufrom;
- ufrom = newfrom;
- while (longswaps-- > 0)
- {
- /* This is ugly, but efficient */
- *swapout++ = swapin[4];
- *swapout++ = swapin[5];
- *swapout++ = swapin[6];
- *swapout++ = swapin[7];
- *swapout++ = swapin[0];
- *swapout++ = swapin[1];
- *swapout++ = swapin[2];
- *swapout++ = swapin[3];
- swapin += 8;
- }
- }
-
- exponent = get_field (ufrom, fmt->byteorder, fmt->totalsize,
- fmt->exp_start, fmt->exp_len);
- /* Note that if exponent indicates a NaN, we can't really do anything useful
- (not knowing if the host has NaN's, or how to build one). So it will
- end up as an infinity or something close; that is OK. */
-
- mant_bits_left = fmt->man_len;
- mant_off = fmt->man_start;
- dto = 0.0;
-
- special_exponent = exponent == 0 || exponent == fmt->exp_nan;
-
-/* Don't bias NaNs. Use minimum exponent for denorms. For simplicity,
- we don't check for zero as the exponent doesn't matter. */
- if (!special_exponent)
- exponent -= fmt->exp_bias;
- else if (exponent == 0)
- exponent = 1 - fmt->exp_bias;
-
- /* Build the result algebraically. Might go infinite, underflow, etc;
- who cares. */
-
-/* If this format uses a hidden bit, explicitly add it in now. Otherwise,
- increment the exponent by one to account for the integer bit. */
-
- if (!special_exponent)
- {
- if (fmt->intbit == floatformat_intbit_no)
- dto = ldexp (1.0, exponent);
- else
- exponent++;
- }
-
- while (mant_bits_left > 0)
- {
- mant_bits = min (mant_bits_left, 32);
-
- mant = get_field (ufrom, fmt->byteorder, fmt->totalsize,
- mant_off, mant_bits);
-
- dto += ldexp ((double) mant, exponent - mant_bits);
- exponent -= mant_bits;
- mant_off += mant_bits;
- mant_bits_left -= mant_bits;
- }
-
- /* Negate it if negative. */
- if (get_field (ufrom, fmt->byteorder, fmt->totalsize, fmt->sign_start, 1))
- dto = -dto;
- *to = dto;
-}
-\f
-static void put_field (unsigned char *, enum floatformat_byteorders,
- unsigned int,
- unsigned int, unsigned int, unsigned long);
-
-/* Set a field which starts at START and is LEN bytes long. DATA and
- TOTAL_LEN are the thing we are extracting it from, in byteorder ORDER. */
-static void
-put_field (unsigned char *data, enum floatformat_byteorders order,
- unsigned int total_len, unsigned int start, unsigned int len,
- unsigned long stuff_to_put)
-{
- unsigned int cur_byte;
- int cur_bitshift;
-
- /* Start at the least significant part of the field. */
- if (order == floatformat_little || order == floatformat_littlebyte_bigword)
- {
- int excess = FLOATFORMAT_CHAR_BIT - (total_len % FLOATFORMAT_CHAR_BIT);
- cur_byte = (total_len / FLOATFORMAT_CHAR_BIT)
- - ((start + len + excess) / FLOATFORMAT_CHAR_BIT);
- cur_bitshift = ((start + len + excess) % FLOATFORMAT_CHAR_BIT)
- - FLOATFORMAT_CHAR_BIT;
- }
- else
- {
- cur_byte = (start + len) / FLOATFORMAT_CHAR_BIT;
- cur_bitshift =
- ((start + len) % FLOATFORMAT_CHAR_BIT) - FLOATFORMAT_CHAR_BIT;
- }
- if (cur_bitshift > -FLOATFORMAT_CHAR_BIT)
- {
- *(data + cur_byte) &=
- ~(((1 << ((start + len) % FLOATFORMAT_CHAR_BIT)) - 1)
- << (-cur_bitshift));
- *(data + cur_byte) |=
- (stuff_to_put & ((1 << FLOATFORMAT_CHAR_BIT) - 1)) << (-cur_bitshift);
- }
- cur_bitshift += FLOATFORMAT_CHAR_BIT;
- if (order == floatformat_little || order == floatformat_littlebyte_bigword)
- ++cur_byte;
- else
- --cur_byte;
-
- /* Move towards the most significant part of the field. */
- while (cur_bitshift < len)
- {
- if (len - cur_bitshift < FLOATFORMAT_CHAR_BIT)
- {
- /* This is the last byte. */
- *(data + cur_byte) &=
- ~((1 << (len - cur_bitshift)) - 1);
- *(data + cur_byte) |= (stuff_to_put >> cur_bitshift);
- }
- else
- *(data + cur_byte) = ((stuff_to_put >> cur_bitshift)
- & ((1 << FLOATFORMAT_CHAR_BIT) - 1));
- cur_bitshift += FLOATFORMAT_CHAR_BIT;
- if (order == floatformat_little || order == floatformat_littlebyte_bigword)
- ++cur_byte;
- else
- --cur_byte;
- }
-}
-
-#ifdef HAVE_LONG_DOUBLE
-/* Return the fractional part of VALUE, and put the exponent of VALUE in *EPTR.
- The range of the returned value is >= 0.5 and < 1.0. This is equivalent to
- frexp, but operates on the long double data type. */
-
-static long double ldfrexp (long double value, int *eptr);
-
-static long double
-ldfrexp (long double value, int *eptr)
-{
- long double tmp;
- int exp;
-
- /* Unfortunately, there are no portable functions for extracting the exponent
- of a long double, so we have to do it iteratively by multiplying or dividing
- by two until the fraction is between 0.5 and 1.0. */
-
- if (value < 0.0l)
- value = -value;
-
- tmp = 1.0l;
- exp = 0;
-
- if (value >= tmp) /* Value >= 1.0 */
- while (value >= tmp)
- {
- tmp *= 2.0l;
- exp++;
- }
- else if (value != 0.0l) /* Value < 1.0 and > 0.0 */
- {
- while (value < tmp)
- {
- tmp /= 2.0l;
- exp--;
- }
- tmp *= 2.0l;
- exp++;
- }
-
- *eptr = exp;
- return value / tmp;
-}
-#endif /* HAVE_LONG_DOUBLE */
-
-
-/* The converse: convert the DOUBLEST *FROM to an extended float
- and store where TO points. Neither FROM nor TO have any alignment
- restrictions. */
-
-void
-floatformat_from_doublest (CONST struct floatformat *fmt, DOUBLEST *from,
- char *to)
-{
- DOUBLEST dfrom;
- int exponent;
- DOUBLEST mant;
- unsigned int mant_bits, mant_off;
- int mant_bits_left;
- unsigned char *uto = (unsigned char *) to;
-
- memcpy (&dfrom, from, sizeof (dfrom));
- memset (uto, 0, (fmt->totalsize + FLOATFORMAT_CHAR_BIT - 1)
- / FLOATFORMAT_CHAR_BIT);
- if (dfrom == 0)
- return; /* Result is zero */
- if (dfrom != dfrom) /* Result is NaN */
- {
- /* From is NaN */
- put_field (uto, fmt->byteorder, fmt->totalsize, fmt->exp_start,
- fmt->exp_len, fmt->exp_nan);
- /* Be sure it's not infinity, but NaN value is irrel */
- put_field (uto, fmt->byteorder, fmt->totalsize, fmt->man_start,
- 32, 1);
- return;
- }
-
- /* If negative, set the sign bit. */
- if (dfrom < 0)
- {
- put_field (uto, fmt->byteorder, fmt->totalsize, fmt->sign_start, 1, 1);
- dfrom = -dfrom;
- }
-
- if (dfrom + dfrom == dfrom && dfrom != 0.0) /* Result is Infinity */
- {
- /* Infinity exponent is same as NaN's. */
- put_field (uto, fmt->byteorder, fmt->totalsize, fmt->exp_start,
- fmt->exp_len, fmt->exp_nan);
- /* Infinity mantissa is all zeroes. */
- put_field (uto, fmt->byteorder, fmt->totalsize, fmt->man_start,
- fmt->man_len, 0);
- return;
- }
-
-#ifdef HAVE_LONG_DOUBLE
- mant = ldfrexp (dfrom, &exponent);
-#else
- mant = frexp (dfrom, &exponent);
-#endif
-
- put_field (uto, fmt->byteorder, fmt->totalsize, fmt->exp_start, fmt->exp_len,
- exponent + fmt->exp_bias - 1);
-
- mant_bits_left = fmt->man_len;
- mant_off = fmt->man_start;
- while (mant_bits_left > 0)
- {
- unsigned long mant_long;
- mant_bits = mant_bits_left < 32 ? mant_bits_left : 32;
-
- mant *= 4294967296.0;
- mant_long = ((unsigned long) mant) & 0xffffffffL;
- mant -= mant_long;
-
- /* If the integer bit is implicit, then we need to discard it.
- If we are discarding a zero, we should be (but are not) creating
- a denormalized number which means adjusting the exponent
- (I think). */
- if (mant_bits_left == fmt->man_len
- && fmt->intbit == floatformat_intbit_no)
- {
- mant_long <<= 1;
- mant_long &= 0xffffffffL;
- mant_bits -= 1;
- }
-
- if (mant_bits < 32)
- {
- /* The bits we want are in the most significant MANT_BITS bits of
- mant_long. Move them to the least significant. */
- mant_long >>= 32 - mant_bits;
- }
-
- put_field (uto, fmt->byteorder, fmt->totalsize,
- mant_off, mant_bits, mant_long);
- mant_off += mant_bits;
- mant_bits_left -= mant_bits;
- }
- if (fmt->byteorder == floatformat_littlebyte_bigword)
- {
- int count;
- unsigned char *swaplow = uto;
- unsigned char *swaphigh = uto + 4;
- unsigned char tmp;
-
- for (count = 0; count < 4; count++)
- {
- tmp = *swaplow;
- *swaplow++ = *swaphigh;
- *swaphigh++ = tmp;
- }
- }
-}
-
/* print routines to handle variable size regs, etc. */
-
/* temporary storage using circular buffer */
#define NUMCELLS 16
#define CELLSIZE 32
switch (i)
{
case 1:
- sprintf (paddr_str, "%s%lu",
- sign, temp[0]);
+ sprintf (paddr_str, "%s%lu", sign, temp[0]);
break;
case 2:
- sprintf (paddr_str, "%s%lu%09lu",
- sign, temp[1], temp[0]);
+ sprintf (paddr_str, "%s%lu%09lu", sign, temp[1], temp[0]);
break;
case 3:
- sprintf (paddr_str, "%s%lu%09lu%09lu",
- sign, temp[2], temp[1], temp[0]);
+ sprintf (paddr_str, "%s%lu%09lu%09lu", sign, temp[2], temp[1], temp[0]);
break;
default:
- abort ();
+ internal_error (__FILE__, __LINE__,
+ "failed internal consistency check");
}
}
char *
phex (ULONGEST l, int sizeof_l)
{
- char *str = get_cell ();
+ char *str;
switch (sizeof_l)
{
case 8:
+ str = get_cell ();
sprintf (str, "%08lx%08lx",
(unsigned long) (l >> thirty_two),
(unsigned long) (l & 0xffffffff));
break;
case 4:
+ str = get_cell ();
sprintf (str, "%08lx", (unsigned long) l);
break;
case 2:
+ str = get_cell ();
sprintf (str, "%04x", (unsigned short) (l & 0xffff));
break;
default:
- phex (l, sizeof (l));
+ str = phex (l, sizeof (l));
break;
}
return str;
char *
phex_nz (ULONGEST l, int sizeof_l)
{
- char *str = get_cell ();
+ char *str;
switch (sizeof_l)
{
case 8:
{
unsigned long high = (unsigned long) (l >> thirty_two);
+ str = get_cell ();
if (high == 0)
sprintf (str, "%lx", (unsigned long) (l & 0xffffffff));
else
- sprintf (str, "%lx%08lx",
- high, (unsigned long) (l & 0xffffffff));
+ sprintf (str, "%lx%08lx", high, (unsigned long) (l & 0xffffffff));
break;
}
case 4:
+ str = get_cell ();
sprintf (str, "%lx", (unsigned long) l);
break;
case 2:
+ str = get_cell ();
sprintf (str, "%x", (unsigned short) (l & 0xffff));
break;
default:
- phex_nz (l, sizeof (l));
+ str = phex_nz (l, sizeof (l));
break;
}
return str;
}
-/* Convert to / from the hosts pointer to GDB's internal CORE_ADDR
- using the target's conversion routines. */
-CORE_ADDR
-host_pointer_to_address (void *ptr)
+/* Convert a CORE_ADDR into a string. */
+const char *
+core_addr_to_string (const CORE_ADDR addr)
{
- if (sizeof (ptr) != TYPE_LENGTH (builtin_type_ptr))
- internal_error ("core_addr_to_void_ptr: bad cast");
- return POINTER_TO_ADDRESS (builtin_type_ptr, &ptr);
+ char *str = get_cell ();
+ strcpy (str, "0x");
+ strcat (str, phex (addr, sizeof (addr)));
+ return str;
}
-void *
-address_to_host_pointer (CORE_ADDR addr)
+const char *
+core_addr_to_string_nz (const CORE_ADDR addr)
{
- void *ptr;
- if (sizeof (ptr) != TYPE_LENGTH (builtin_type_ptr))
- internal_error ("core_addr_to_void_ptr: bad cast");
- ADDRESS_TO_POINTER (builtin_type_ptr, &ptr, addr);
- return ptr;
+ char *str = get_cell ();
+ strcpy (str, "0x");
+ strcat (str, phex_nz (addr, sizeof (addr)));
+ return str;
+}
+
+/* Convert a string back into a CORE_ADDR. */
+CORE_ADDR
+string_to_core_addr (const char *my_string)
+{
+ CORE_ADDR addr = 0;
+ if (my_string[0] == '0' && tolower (my_string[1]) == 'x')
+ {
+ /* Assume that it is in decimal. */
+ int i;
+ for (i = 2; my_string[i] != '\0'; i++)
+ {
+ if (isdigit (my_string[i]))
+ addr = (my_string[i] - '0') + (addr * 16);
+ else if (isxdigit (my_string[i]))
+ addr = (tolower (my_string[i]) - 'a' + 0xa) + (addr * 16);
+ else
+ internal_error (__FILE__, __LINE__, "invalid hex");
+ }
+ }
+ else
+ {
+ /* Assume that it is in decimal. */
+ int i;
+ for (i = 0; my_string[i] != '\0'; i++)
+ {
+ if (isdigit (my_string[i]))
+ addr = (my_string[i] - '0') + (addr * 10);
+ else
+ internal_error (__FILE__, __LINE__, "invalid decimal");
+ }
+ }
+ return addr;
+}
+
+char *
+gdb_realpath (const char *filename)
+{
+ /* Method 1: The system has a compile time upper bound on a filename
+ path. Use that and realpath() to canonicalize the name. This is
+ the most common case. Note that, if there isn't a compile time
+ upper bound, you want to avoid realpath() at all costs. */
+#if defined(HAVE_REALPATH)
+ {
+# if defined (PATH_MAX)
+ char buf[PATH_MAX];
+# define USE_REALPATH
+# elif defined (MAXPATHLEN)
+ char buf[MAXPATHLEN];
+# define USE_REALPATH
+# endif
+# if defined (USE_REALPATH)
+ const char *rp = realpath (filename, buf);
+ if (rp == NULL)
+ rp = filename;
+ return xstrdup (rp);
+# endif
+ }
+#endif /* HAVE_REALPATH */
+
+ /* Method 2: The host system (i.e., GNU) has the function
+ canonicalize_file_name() which malloc's a chunk of memory and
+ returns that, use that. */
+#if defined(HAVE_CANONICALIZE_FILE_NAME)
+ {
+ char *rp = canonicalize_file_name (filename);
+ if (rp == NULL)
+ return xstrdup (filename);
+ else
+ return rp;
+ }
+#endif
+
+ /* FIXME: cagney/2002-11-13:
+
+ Method 2a: Use realpath() with a NULL buffer. Some systems, due
+ to the problems described in in method 3, have modified their
+ realpath() implementation so that it will allocate a buffer when
+ NULL is passed in. Before this can be used, though, some sort of
+ configure time test would need to be added. Otherwize the code
+ will likely core dump. */
+
+ /* Method 3: Now we're getting desperate! The system doesn't have a
+ compile time buffer size and no alternative function. Query the
+ OS, using pathconf(), for the buffer limit. Care is needed
+ though, some systems do not limit PATH_MAX (return -1 for
+ pathconf()) making it impossible to pass a correctly sized buffer
+ to realpath() (it could always overflow). On those systems, we
+ skip this. */
+#if defined (HAVE_REALPATH) && defined (HAVE_UNISTD_H) && defined(HAVE_ALLOCA)
+ {
+ /* Find out the max path size. */
+ long path_max = pathconf ("/", _PC_PATH_MAX);
+ if (path_max > 0)
+ {
+ /* PATH_MAX is bounded. */
+ char *buf = alloca (path_max);
+ char *rp = realpath (filename, buf);
+ return xstrdup (rp ? rp : filename);
+ }
+ }
+#endif
+
+ /* This system is a lost cause, just dup the buffer. */
+ return xstrdup (filename);
+}
+
+/* Return a copy of FILENAME, with its directory prefix canonicalized
+ by gdb_realpath. */
+
+char *
+xfullpath (const char *filename)
+{
+ const char *base_name = lbasename (filename);
+ char *dir_name;
+ char *real_path;
+ char *result;
+
+ /* Extract the basename of filename, and return immediately
+ a copy of filename if it does not contain any directory prefix. */
+ if (base_name == filename)
+ return xstrdup (filename);
+
+ dir_name = alloca ((size_t) (base_name - filename + 2));
+ /* Allocate enough space to store the dir_name + plus one extra
+ character sometimes needed under Windows (see below), and
+ then the closing \000 character */
+ strncpy (dir_name, filename, base_name - filename);
+ dir_name[base_name - filename] = '\000';
+
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+ /* We need to be careful when filename is of the form 'd:foo', which
+ is equivalent of d:./foo, which is totally different from d:/foo. */
+ if (strlen (dir_name) == 2 && isalpha (dir_name[0]) && dir_name[1] == ':')
+ {
+ dir_name[2] = '.';
+ dir_name[3] = '\000';
+ }
+#endif
+
+ /* Canonicalize the directory prefix, and build the resulting
+ filename. If the dirname realpath already contains an ending
+ directory separator, avoid doubling it. */
+ real_path = gdb_realpath (dir_name);
+ if (IS_DIR_SEPARATOR (real_path[strlen (real_path) - 1]))
+ result = concat (real_path, base_name, NULL);
+ else
+ result = concat (real_path, SLASH_STRING, base_name, NULL);
+
+ xfree (real_path);
+ return result;
+}
+
+
+/* This is the 32-bit CRC function used by the GNU separate debug
+ facility. An executable may contain a section named
+ .gnu_debuglink, which holds the name of a separate executable file
+ containing its debug info, and a checksum of that file's contents,
+ computed using this function. */
+unsigned long
+gnu_debuglink_crc32 (unsigned long crc, unsigned char *buf, size_t len)
+{
+ static const unsigned long crc32_table[256] = {
+ 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
+ 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
+ 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
+ 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
+ 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
+ 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
+ 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
+ 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+ 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
+ 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
+ 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
+ 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+ 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
+ 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
+ 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
+ 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+ 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
+ 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+ 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
+ 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
+ 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
+ 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
+ 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
+ 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+ 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
+ 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
+ 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
+ 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
+ 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
+ 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+ 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
+ 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+ 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
+ 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
+ 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
+ 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+ 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
+ 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
+ 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
+ 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+ 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
+ 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+ 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
+ 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
+ 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
+ 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
+ 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
+ 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+ 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
+ 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
+ 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
+ 0x2d02ef8d
+ };
+ unsigned char *end;
+
+ crc = ~crc & 0xffffffff;
+ for (end = buf + len; buf < end; ++buf)
+ crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
+ return ~crc & 0xffffffff;;
}