void
init_eval_once (void)
{
- specpdl_size = 50;
- specpdl = (struct specbinding *) xmalloc (specpdl_size * sizeof (struct specbinding));
+ enum { size = 50 };
+ specpdl = (struct specbinding *) xmalloc (size * sizeof (struct specbinding));
+ specpdl_size = size;
specpdl_ptr = specpdl;
/* Don't forget to update docs (lispref node "Local Variables"). */
max_specpdl_size = 1300; /* 1000 is not enough for CEDET's c-by.el. */
if (lisp_eval_depth + 40 > max_lisp_eval_depth)
max_lisp_eval_depth = lisp_eval_depth + 40;
- if (SPECPDL_INDEX () + 100 > max_specpdl_size)
+ if (max_specpdl_size - 100 < SPECPDL_INDEX ())
max_specpdl_size = SPECPDL_INDEX () + 100;
#ifdef HAVE_WINDOW_SYSTEM
args_left = Fcdr (Fcdr (args_left));
}
- while (!NILP(args_left));
+ while (!NILP (args_left));
UNGCPRO;
return val;
DEFUN ("quote", Fquote, Squote, 1, UNEVALLED, 0,
doc: /* Return the argument, without evaluating it. `(quote x)' yields `x'.
+Warning: `quote' does not construct its return value, but just returns
+the value that was pre-constructed by the Lisp reader (see info node
+`(elisp)Printed Representation').
+This means that '(a . b) is not identical to (cons 'a 'b): the former
+does not cons. Quoting should be reserved for constants that will
+never be modified by side-effects, unless you like self-modifying code.
+See the common pitfall in info node `(elisp)Rearrangement' for an example
+of unexpected results when a quoted object is modified.
usage: (quote ARG) */)
(Lisp_Object args)
{
if CONDITION-NAME is one of the error's condition names.
If an error happens, the first applicable handler is run.
-The car of a handler may be a list of condition names
-instead of a single condition name. Then it handles all of them.
+The car of a handler may be a list of condition names instead of a
+single condition name; then it handles all of them. If the special
+condition name `debug' is present in this list, it allows another
+condition in the list to run the debugger if `debug-on-error' and the
+other usual mechanisms says it should (otherwise, `condition-case'
+suppresses the debugger).
When a handler handles an error, control returns to the `condition-case'
and it executes the handler's BODY...
struct catchtag c;
struct handler h;
- /* Since Fsignal will close off all calls to x_catch_errors,
- we will get the wrong results if some are not closed now. */
-#if HAVE_X_WINDOWS
- if (x_catching_errors ())
- abort ();
-#endif
-
c.tag = Qnil;
c.val = Qnil;
c.backlist = backtrace_list;
struct catchtag c;
struct handler h;
- /* Since Fsignal will close off all calls to x_catch_errors,
- we will get the wrong results if some are not closed now. */
-#if HAVE_X_WINDOWS
- if (x_catching_errors ())
- abort ();
-#endif
-
c.tag = Qnil;
c.val = Qnil;
c.backlist = backtrace_list;
struct catchtag c;
struct handler h;
- /* Since Fsignal will close off all calls to x_catch_errors,
- we will get the wrong results if some are not closed now. */
-#if HAVE_X_WINDOWS
- if (x_catching_errors ())
- abort ();
-#endif
-
c.tag = Qnil;
c.val = Qnil;
c.backlist = backtrace_list;
struct catchtag c;
struct handler h;
- /* Since Fsignal will close off all calls to x_catch_errors,
- we will get the wrong results if some are not closed now. */
-#if HAVE_X_WINDOWS
- if (x_catching_errors ())
- abort ();
-#endif
-
c.tag = Qnil;
c.val = Qnil;
c.backlist = backtrace_list;
static int maybe_call_debugger (Lisp_Object conditions, Lisp_Object sig,
Lisp_Object data);
+void
+process_quit_flag (void)
+{
+ Lisp_Object flag = Vquit_flag;
+ Vquit_flag = Qnil;
+ if (EQ (flag, Qkill_emacs))
+ Fkill_emacs (Qnil);
+ if (EQ (Vthrow_on_input, flag))
+ Fthrow (Vthrow_on_input, Qt);
+ Fsignal (Qquit, Qnil);
+}
+
DEFUN ("signal", Fsignal, Ssignal, 2, 2, 0,
doc: /* Signal an error. Args are ERROR-SYMBOL and associated DATA.
This function does not return.
&& (!NILP (Vdebug_on_signal)
/* If no handler is present now, try to run the debugger. */
|| NILP (clause)
+ /* A `debug' symbol in the handler list disables the normal
+ suppression of the debugger. */
+ || (CONSP (clause) && CONSP (XCAR (clause))
+ && !NILP (Fmemq (Qdebug, XCAR (clause))))
/* Special handler that means "print a message and run debugger
if requested". */
|| EQ (h->handler, Qerror)))
char buf[4000];
ptrdiff_t size = sizeof buf;
ptrdiff_t size_max = STRING_BYTES_BOUND + 1;
- char const *m_end = m + strlen (m);
char *buffer = buf;
ptrdiff_t used;
Lisp_Object string;
- while (1)
- {
- va_list ap_copy;
- va_copy (ap_copy, ap);
- used = doprnt (buffer, size, m, m_end, ap_copy);
- va_end (ap_copy);
-
- /* Note: the -1 below is because `doprnt' returns the number of bytes
- excluding the terminating null byte, and it always terminates with a
- null byte, even when producing a truncated message. */
- if (used < size - 1)
- break;
- if (size <= size_max / 2)
- size *= 2;
- else if (size < size_max)
- size = size_max;
- else
- break; /* and leave the message truncated */
-
- if (buffer != buf)
- xfree (buffer);
- buffer = (char *) xmalloc (size);
- }
-
+ used = evxprintf (&buffer, &size, buf, size_max, m, ap);
string = make_string (buffer, used);
if (buffer != buf)
xfree (buffer);
grow_specpdl (void)
{
register int count = SPECPDL_INDEX ();
- if (specpdl_size >= max_specpdl_size)
+ int max_size =
+ min (max_specpdl_size,
+ min (max (PTRDIFF_MAX, SIZE_MAX) / sizeof (struct specbinding),
+ INT_MAX));
+ int size;
+ if (max_size <= specpdl_size)
{
if (max_specpdl_size < 400)
- max_specpdl_size = 400;
- if (specpdl_size >= max_specpdl_size)
+ max_size = max_specpdl_size = 400;
+ if (max_size <= specpdl_size)
signal_error ("Variable binding depth exceeds max-specpdl-size", Qnil);
}
- specpdl_size *= 2;
- if (specpdl_size > max_specpdl_size)
- specpdl_size = max_specpdl_size;
- specpdl = (struct specbinding *) xrealloc (specpdl, specpdl_size * sizeof (struct specbinding));
+ size = specpdl_size < max_size / 2 ? 2 * specpdl_size : max_size;
+ specpdl = xnrealloc (specpdl, size, sizeof *specpdl);
+ specpdl_size = size;
specpdl_ptr = specpdl + count;
}
A value of `(t)' indicates an empty environment, otherwise it is an
alist of active lexical bindings. */);
Vinternal_interpreter_environment = Qnil;
- /* Don't export this variable to Elisp, so noone can mess with it
+ /* Don't export this variable to Elisp, so no one can mess with it
(Just imagine if someone makes it buffer-local). */
Funintern (Qinternal_interpreter_environment, Qnil);
HCoop / bpt / emacs.git / blobdiff