#include "commands.h"
#include "keyboard.h"
#include "dispextern.h"
+#include "guile.h"
+
+static void unbind_once (void *ignore);
/* Chain of condition and catch handlers currently in effect. */
return pdl->let.where;
}
-static Lisp_Object
-specpdl_arg (union specbinding *pdl)
-{
- eassert (pdl->kind == SPECPDL_UNWIND);
- return pdl->unwind.arg;
-}
-
Lisp_Object
backtrace_function (union specbinding *pdl)
{
return pdl;
}
+struct handler *
+make_catch_handler (Lisp_Object tag)
+{
+ struct handler *c = xmalloc (sizeof (*c));
+ c->type = CATCHER;
+ c->tag_or_ch = tag;
+ c->val = Qnil;
+ c->var = Qnil;
+ c->body = Qnil;
+ c->next = handlerlist;
+ c->lisp_eval_depth = lisp_eval_depth;
+ c->interrupt_input_blocked = interrupt_input_blocked;
+ c->ptag = make_prompt_tag ();
+ return c;
+}
+
+struct handler *
+make_condition_handler (Lisp_Object tag)
+{
+ struct handler *c = xmalloc (sizeof (*c));
+ c->type = CONDITION_CASE;
+ c->tag_or_ch = tag;
+ c->val = Qnil;
+ c->var = Qnil;
+ c->body = Qnil;
+ c->next = handlerlist;
+ c->lisp_eval_depth = lisp_eval_depth;
+ c->interrupt_input_blocked = interrupt_input_blocked;
+ c->ptag = make_prompt_tag ();
+ return c;
+}
+
+static Lisp_Object eval_fn;
+static Lisp_Object funcall_fn;
void
init_eval_once (void)
specpdl_size = size;
specpdl = specpdl_ptr = pdlvec + 1;
/* Don't forget to update docs (lispref node "Local Variables"). */
- max_specpdl_size = 1300; /* 1000 is not enough for CEDET's c-by.el. */
- max_lisp_eval_depth = 600;
+ max_specpdl_size = 10000; /* 1000 is not enough for CEDET's c-by.el. */
+ max_lisp_eval_depth = 10000;
Vrun_hooks = Qnil;
+
+ eval_fn = scm_c_public_ref ("language elisp runtime", "eval-elisp");
+ funcall_fn = scm_c_public_ref ("elisp-functions", "funcall");
+
+ scm_set_smob_apply (lisp_vectorlike_tag, apply_lambda, 0, 0, 1);
}
-static struct handler handlerlist_sentinel;
+static struct handler *handlerlist_sentinel;
void
init_eval (void)
{
specpdl_ptr = specpdl;
- { /* Put a dummy catcher at top-level so that handlerlist is never NULL.
- This is important since handlerlist->nextfree holds the freelist
- which would otherwise leak every time we unwind back to top-level. */
- struct handler *c;
- handlerlist = handlerlist_sentinel.nextfree = &handlerlist_sentinel;
- PUSH_HANDLER (c, Qunbound, CATCHER);
- eassert (c == &handlerlist_sentinel);
- handlerlist_sentinel.nextfree = NULL;
- handlerlist_sentinel.next = NULL;
- }
+ handlerlist_sentinel = make_catch_handler (Qunbound);
+ handlerlist = handlerlist_sentinel;
Vquit_flag = Qnil;
debug_on_next_call = 0;
lisp_eval_depth = 0;
Lisp_Object val;
EMACS_INT old_depth = max_lisp_eval_depth;
/* Do not allow max_specpdl_size less than actual depth (Bug#16603). */
- EMACS_INT old_max = max (max_specpdl_size, count);
+ EMACS_INT old_max = max_specpdl_size;
if (lisp_eval_depth + 40 > max_lisp_eval_depth)
max_lisp_eval_depth = lisp_eval_depth + 40;
- /* While debugging Bug#16603, previous value of 100 was found
- too small to avoid specpdl overflow in the debugger itself. */
- if (max_specpdl_size - 200 < count)
- max_specpdl_size = count + 200;
-
- if (old_max == count)
- {
- /* We can enter the debugger due to specpdl overflow (Bug#16603). */
- specpdl_ptr--;
- grow_specpdl ();
- }
-
/* Restore limits after leaving the debugger. */
record_unwind_protect (restore_stack_limits,
Fcons (make_number (old_max),
call_debugger (list1 (code));
}
\f
-/* NOTE!!! Every function that can call EVAL must protect its args
- and temporaries from garbage collection while it needs them.
- The definition of `For' shows what you have to do. */
-
-DEFUN ("or", For, Sor, 0, UNEVALLED, 0,
- doc: /* Eval args until one of them yields non-nil, then return that value.
-The remaining args are not evalled at all.
-If all args return nil, return nil.
-usage: (or CONDITIONS...) */)
- (Lisp_Object args)
-{
- register Lisp_Object val = Qnil;
- struct gcpro gcpro1;
-
- GCPRO1 (args);
-
- while (CONSP (args))
- {
- val = eval_sub (XCAR (args));
- if (!NILP (val))
- break;
- args = XCDR (args);
- }
-
- UNGCPRO;
- return val;
-}
-
-DEFUN ("and", Fand, Sand, 0, UNEVALLED, 0,
- doc: /* Eval args until one of them yields nil, then return nil.
-The remaining args are not evalled at all.
-If no arg yields nil, return the last arg's value.
-usage: (and CONDITIONS...) */)
- (Lisp_Object args)
-{
- register Lisp_Object val = Qt;
- struct gcpro gcpro1;
-
- GCPRO1 (args);
-
- while (CONSP (args))
- {
- val = eval_sub (XCAR (args));
- if (NILP (val))
- break;
- args = XCDR (args);
- }
-
- UNGCPRO;
- return val;
-}
-
-DEFUN ("if", Fif, Sif, 2, UNEVALLED, 0,
- doc: /* If COND yields non-nil, do THEN, else do ELSE...
-Returns the value of THEN or the value of the last of the ELSE's.
-THEN must be one expression, but ELSE... can be zero or more expressions.
-If COND yields nil, and there are no ELSE's, the value is nil.
-usage: (if COND THEN ELSE...) */)
- (Lisp_Object args)
-{
- Lisp_Object cond;
- struct gcpro gcpro1;
-
- GCPRO1 (args);
- cond = eval_sub (XCAR (args));
- UNGCPRO;
-
- if (!NILP (cond))
- return eval_sub (Fcar (XCDR (args)));
- return Fprogn (XCDR (XCDR (args)));
-}
-
-DEFUN ("cond", Fcond, Scond, 0, UNEVALLED, 0,
- doc: /* Try each clause until one succeeds.
-Each clause looks like (CONDITION BODY...). CONDITION is evaluated
-and, if the value is non-nil, this clause succeeds:
-then the expressions in BODY are evaluated and the last one's
-value is the value of the cond-form.
-If a clause has one element, as in (CONDITION), then the cond-form
-returns CONDITION's value, if that is non-nil.
-If no clause succeeds, cond returns nil.
-usage: (cond CLAUSES...) */)
- (Lisp_Object args)
-{
- Lisp_Object val = args;
- struct gcpro gcpro1;
-
- GCPRO1 (args);
- while (CONSP (args))
- {
- Lisp_Object clause = XCAR (args);
- val = eval_sub (Fcar (clause));
- if (!NILP (val))
- {
- if (!NILP (XCDR (clause)))
- val = Fprogn (XCDR (clause));
- break;
- }
- args = XCDR (args);
- }
- UNGCPRO;
-
- return val;
-}
-
DEFUN ("progn", Fprogn, Sprogn, 0, UNEVALLED, 0,
doc: /* Eval BODY forms sequentially and return value of last one.
usage: (progn BODY...) */)
Fprogn (body);
}
-DEFUN ("prog1", Fprog1, Sprog1, 1, UNEVALLED, 0,
- doc: /* Eval FIRST and BODY sequentially; return value from FIRST.
-The value of FIRST is saved during the evaluation of the remaining args,
-whose values are discarded.
-usage: (prog1 FIRST BODY...) */)
- (Lisp_Object args)
-{
- Lisp_Object val;
- Lisp_Object args_left;
- struct gcpro gcpro1, gcpro2;
-
- args_left = args;
- val = args;
- GCPRO2 (args, val);
-
- val = eval_sub (XCAR (args_left));
- while (CONSP (args_left = XCDR (args_left)))
- eval_sub (XCAR (args_left));
-
- UNGCPRO;
- return val;
-}
-
-DEFUN ("prog2", Fprog2, Sprog2, 2, UNEVALLED, 0,
- doc: /* Eval FORM1, FORM2 and BODY sequentially; return value from FORM2.
-The value of FORM2 is saved during the evaluation of the
-remaining args, whose values are discarded.
-usage: (prog2 FORM1 FORM2 BODY...) */)
- (Lisp_Object args)
-{
- struct gcpro gcpro1;
-
- GCPRO1 (args);
- eval_sub (XCAR (args));
- UNGCPRO;
- return Fprog1 (XCDR (args));
-}
-
-DEFUN ("setq", Fsetq, Ssetq, 0, UNEVALLED, 0,
- doc: /* Set each SYM to the value of its VAL.
-The symbols SYM are variables; they are literal (not evaluated).
-The values VAL are expressions; they are evaluated.
-Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'.
-The second VAL is not computed until after the first SYM is set, and so on;
-each VAL can use the new value of variables set earlier in the `setq'.
-The return value of the `setq' form is the value of the last VAL.
-usage: (setq [SYM VAL]...) */)
- (Lisp_Object args)
-{
- Lisp_Object val, sym, lex_binding;
-
- val = args;
- if (CONSP (args))
- {
- Lisp_Object args_left = args;
- struct gcpro gcpro1;
- GCPRO1 (args);
-
- do
- {
- val = eval_sub (Fcar (XCDR (args_left)));
- sym = XCAR (args_left);
-
- /* Like for eval_sub, we do not check declared_special here since
- it's been done when let-binding. */
- if (!NILP (Vinternal_interpreter_environment) /* Mere optimization! */
- && SYMBOLP (sym)
- && !NILP (lex_binding
- = Fassq (sym, Vinternal_interpreter_environment)))
- XSETCDR (lex_binding, val); /* SYM is lexically bound. */
- else
- Fset (sym, val); /* SYM is dynamically bound. */
-
- args_left = Fcdr (XCDR (args_left));
- }
- while (CONSP (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 (CONSP (XCDR (args)))
- xsignal2 (Qwrong_number_of_arguments, Qquote, Flength (args));
- return XCAR (args);
-}
-
-DEFUN ("function", Ffunction, Sfunction, 1, UNEVALLED, 0,
- doc: /* Like `quote', but preferred for objects which are functions.
-In byte compilation, `function' causes its argument to be compiled.
-`quote' cannot do that.
-usage: (function ARG) */)
- (Lisp_Object args)
+Lisp_Object
+Ffunction (Lisp_Object args)
{
Lisp_Object quoted = XCAR (args);
return quoted;
}
-
DEFUN ("defvaralias", Fdefvaralias, Sdefvaralias, 2, 3, 0,
doc: /* Make NEW-ALIAS a variable alias for symbol BASE-VARIABLE.
Aliased variables always have the same value; setting one sets the other.
The return value is BASE-VARIABLE. */)
(Lisp_Object new_alias, Lisp_Object base_variable, Lisp_Object docstring)
{
- struct Lisp_Symbol *sym;
+ sym_t sym;
CHECK_SYMBOL (new_alias);
CHECK_SYMBOL (base_variable);
sym = XSYMBOL (new_alias);
- if (sym->constant)
+ if (SYMBOL_CONSTANT (sym))
/* Not sure why, but why not? */
error ("Cannot make a constant an alias");
- switch (sym->redirect)
+ switch (SYMBOL_REDIRECT (sym))
{
case SYMBOL_FORWARDED:
error ("Cannot make an internal variable an alias");
error ("Don't know how to make a let-bound variable an alias");
}
- sym->declared_special = 1;
- XSYMBOL (base_variable)->declared_special = 1;
- sym->redirect = SYMBOL_VARALIAS;
+ SET_SYMBOL_DECLARED_SPECIAL (sym, 1);
+ SET_SYMBOL_DECLARED_SPECIAL (XSYMBOL (base_variable), 1);
+ SET_SYMBOL_REDIRECT (sym, SYMBOL_VARALIAS);
SET_SYMBOL_ALIAS (sym, XSYMBOL (base_variable));
- sym->constant = SYMBOL_CONSTANT_P (base_variable);
+ SET_SYMBOL_CONSTANT (sym, SYMBOL_CONSTANT_P (base_variable));
LOADHIST_ATTACH (new_alias);
/* Even if docstring is nil: remove old docstring. */
Fput (new_alias, Qvariable_documentation, docstring);
return Qnil;
}
-DEFUN ("defvar", Fdefvar, Sdefvar, 1, UNEVALLED, 0,
- doc: /* Define SYMBOL as a variable, and return SYMBOL.
-You are not required to define a variable in order to use it, but
-defining it lets you supply an initial value and documentation, which
-can be referred to by the Emacs help facilities and other programming
-tools. The `defvar' form also declares the variable as \"special\",
-so that it is always dynamically bound even if `lexical-binding' is t.
-
-The optional argument INITVALUE is evaluated, and used to set SYMBOL,
-only if SYMBOL's value is void. If SYMBOL is buffer-local, its
-default value is what is set; buffer-local values are not affected.
-If INITVALUE is missing, SYMBOL's value is not set.
-
-If SYMBOL has a local binding, then this form affects the local
-binding. This is usually not what you want. Thus, if you need to
-load a file defining variables, with this form or with `defconst' or
-`defcustom', you should always load that file _outside_ any bindings
-for these variables. \(`defconst' and `defcustom' behave similarly in
-this respect.)
-
-The optional argument DOCSTRING is a documentation string for the
-variable.
-
-To define a user option, use `defcustom' instead of `defvar'.
-usage: (defvar SYMBOL &optional INITVALUE DOCSTRING) */)
- (Lisp_Object args)
-{
- Lisp_Object sym, tem, tail;
-
- sym = XCAR (args);
- tail = XCDR (args);
-
- if (CONSP (tail))
- {
- if (CONSP (XCDR (tail)) && CONSP (XCDR (XCDR (tail))))
- error ("Too many arguments");
-
- tem = Fdefault_boundp (sym);
-
- /* Do it before evaluating the initial value, for self-references. */
- XSYMBOL (sym)->declared_special = 1;
-
- if (NILP (tem))
- Fset_default (sym, eval_sub (XCAR (tail)));
- else
- { /* Check if there is really a global binding rather than just a let
- binding that shadows the global unboundness of the var. */
- union specbinding *binding = default_toplevel_binding (sym);
- if (binding && EQ (specpdl_old_value (binding), Qunbound))
- {
- set_specpdl_old_value (binding, eval_sub (XCAR (tail)));
- }
- }
- tail = XCDR (tail);
- tem = Fcar (tail);
- if (!NILP (tem))
- {
- if (!NILP (Vpurify_flag))
- tem = Fpurecopy (tem);
- Fput (sym, Qvariable_documentation, tem);
- }
- LOADHIST_ATTACH (sym);
- }
- else if (!NILP (Vinternal_interpreter_environment)
- && !XSYMBOL (sym)->declared_special)
- /* A simple (defvar foo) with lexical scoping does "nothing" except
- declare that var to be dynamically scoped *locally* (i.e. within
- the current file or let-block). */
- Vinternal_interpreter_environment
- = Fcons (sym, Vinternal_interpreter_environment);
- else
- {
- /* Simple (defvar <var>) should not count as a definition at all.
- It could get in the way of other definitions, and unloading this
- package could try to make the variable unbound. */
- }
-
- return sym;
-}
-
-DEFUN ("defconst", Fdefconst, Sdefconst, 2, UNEVALLED, 0,
- doc: /* Define SYMBOL as a constant variable.
-This declares that neither programs nor users should ever change the
-value. This constancy is not actually enforced by Emacs Lisp, but
-SYMBOL is marked as a special variable so that it is never lexically
-bound.
-
-The `defconst' form always sets the value of SYMBOL to the result of
-evalling INITVALUE. If SYMBOL is buffer-local, its default value is
-what is set; buffer-local values are not affected. If SYMBOL has a
-local binding, then this form sets the local binding's value.
-However, you should normally not make local bindings for variables
-defined with this form.
-
-The optional DOCSTRING specifies the variable's documentation string.
-usage: (defconst SYMBOL INITVALUE [DOCSTRING]) */)
- (Lisp_Object args)
-{
- Lisp_Object sym, tem;
-
- sym = XCAR (args);
- if (CONSP (Fcdr (XCDR (XCDR (args)))))
- error ("Too many arguments");
-
- tem = eval_sub (Fcar (XCDR (args)));
- if (!NILP (Vpurify_flag))
- tem = Fpurecopy (tem);
- Fset_default (sym, tem);
- XSYMBOL (sym)->declared_special = 1;
- tem = Fcar (XCDR (XCDR (args)));
- if (!NILP (tem))
- {
- if (!NILP (Vpurify_flag))
- tem = Fpurecopy (tem);
- Fput (sym, Qvariable_documentation, tem);
- }
- Fput (sym, Qrisky_local_variable, Qt);
- LOADHIST_ATTACH (sym);
- return sym;
-}
-
/* Make SYMBOL lexically scoped. */
DEFUN ("internal-make-var-non-special", Fmake_var_non_special,
Smake_var_non_special, 1, 1, 0,
(Lisp_Object symbol)
{
CHECK_SYMBOL (symbol);
- XSYMBOL (symbol)->declared_special = 0;
+ SET_SYMBOL_DECLARED_SPECIAL (XSYMBOL (symbol), 0);
return Qnil;
}
\f
-DEFUN ("let*", FletX, SletX, 1, UNEVALLED, 0,
- doc: /* Bind variables according to VARLIST then eval BODY.
-The value of the last form in BODY is returned.
-Each element of VARLIST is a symbol (which is bound to nil)
-or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
-Each VALUEFORM can refer to the symbols already bound by this VARLIST.
-usage: (let* VARLIST BODY...) */)
- (Lisp_Object args)
-{
- Lisp_Object varlist, var, val, elt, lexenv;
- dynwind_begin ();
- struct gcpro gcpro1, gcpro2, gcpro3;
-
- GCPRO3 (args, elt, varlist);
-
- lexenv = Vinternal_interpreter_environment;
-
- varlist = XCAR (args);
- while (CONSP (varlist))
- {
- QUIT;
-
- elt = XCAR (varlist);
- if (SYMBOLP (elt))
- {
- var = elt;
- val = Qnil;
- }
- else if (! NILP (Fcdr (Fcdr (elt))))
- signal_error ("`let' bindings can have only one value-form", elt);
- else
- {
- var = Fcar (elt);
- val = eval_sub (Fcar (Fcdr (elt)));
- }
-
- if (!NILP (lexenv) && SYMBOLP (var)
- && !XSYMBOL (var)->declared_special
- && NILP (Fmemq (var, Vinternal_interpreter_environment)))
- /* Lexically bind VAR by adding it to the interpreter's binding
- alist. */
- {
- Lisp_Object newenv
- = Fcons (Fcons (var, val), Vinternal_interpreter_environment);
- if (EQ (Vinternal_interpreter_environment, lexenv))
- /* Save the old lexical environment on the specpdl stack,
- but only for the first lexical binding, since we'll never
- need to revert to one of the intermediate ones. */
- specbind (Qinternal_interpreter_environment, newenv);
- else
- Vinternal_interpreter_environment = newenv;
- }
- else
- specbind (var, val);
-
- varlist = XCDR (varlist);
- }
- UNGCPRO;
- val = Fprogn (XCDR (args));
- dynwind_end ();
- return val;
-}
-
-DEFUN ("let", Flet, Slet, 1, UNEVALLED, 0,
- doc: /* Bind variables according to VARLIST then eval BODY.
-The value of the last form in BODY is returned.
-Each element of VARLIST is a symbol (which is bound to nil)
-or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM).
-All the VALUEFORMs are evalled before any symbols are bound.
-usage: (let VARLIST BODY...) */)
- (Lisp_Object args)
-{
- Lisp_Object *temps, tem, lexenv;
- register Lisp_Object elt, varlist;
- dynwind_begin ();
- ptrdiff_t argnum;
- struct gcpro gcpro1, gcpro2;
- USE_SAFE_ALLOCA;
-
- varlist = XCAR (args);
-
- /* Make space to hold the values to give the bound variables. */
- elt = Flength (varlist);
- SAFE_ALLOCA_LISP (temps, XFASTINT (elt));
-
- /* Compute the values and store them in `temps'. */
-
- GCPRO2 (args, *temps);
- gcpro2.nvars = 0;
-
- for (argnum = 0; CONSP (varlist); varlist = XCDR (varlist))
- {
- QUIT;
- elt = XCAR (varlist);
- if (SYMBOLP (elt))
- temps [argnum++] = Qnil;
- else if (! NILP (Fcdr (Fcdr (elt))))
- signal_error ("`let' bindings can have only one value-form", elt);
- else
- temps [argnum++] = eval_sub (Fcar (Fcdr (elt)));
- gcpro2.nvars = argnum;
- }
- UNGCPRO;
-
- lexenv = Vinternal_interpreter_environment;
-
- varlist = XCAR (args);
- for (argnum = 0; CONSP (varlist); varlist = XCDR (varlist))
- {
- Lisp_Object var;
-
- elt = XCAR (varlist);
- var = SYMBOLP (elt) ? elt : Fcar (elt);
- tem = temps[argnum++];
-
- if (!NILP (lexenv) && SYMBOLP (var)
- && !XSYMBOL (var)->declared_special
- && NILP (Fmemq (var, Vinternal_interpreter_environment)))
- /* Lexically bind VAR by adding it to the lexenv alist. */
- lexenv = Fcons (Fcons (var, tem), lexenv);
- else
- /* Dynamically bind VAR. */
- specbind (var, tem);
- }
-
- if (!EQ (lexenv, Vinternal_interpreter_environment))
- /* Instantiate a new lexical environment. */
- specbind (Qinternal_interpreter_environment, lexenv);
-
- elt = Fprogn (XCDR (args));
- SAFE_FREE ();
- dynwind_end ();
- return elt;
-}
-
-DEFUN ("while", Fwhile, Swhile, 1, UNEVALLED, 0,
- doc: /* If TEST yields non-nil, eval BODY... and repeat.
-The order of execution is thus TEST, BODY, TEST, BODY and so on
-until TEST returns nil.
-usage: (while TEST BODY...) */)
- (Lisp_Object args)
-{
- Lisp_Object test, body;
- struct gcpro gcpro1, gcpro2;
-
- GCPRO2 (test, body);
-
- test = XCAR (args);
- body = XCDR (args);
- while (!NILP (eval_sub (test)))
- {
- QUIT;
- Fprogn (body);
- }
-
- UNGCPRO;
- return Qnil;
-}
-
DEFUN ("macroexpand", Fmacroexpand, Smacroexpand, 1, 2, 0,
doc: /* Return result of expanding macros at top level of FORM.
If FORM is not a macro call, it is returned unchanged.
tem = Fassq (sym, environment);
if (NILP (tem))
{
- def = XSYMBOL (sym)->function;
+ def = SYMBOL_FUNCTION (sym);
if (!NILP (def))
continue;
}
return form;
}
\f
-DEFUN ("catch", Fcatch, Scatch, 1, UNEVALLED, 0,
+DEFUN ("call-with-catch", Fcatch, Scatch, 2, 2, 0,
doc: /* Eval BODY allowing nonlocal exits using `throw'.
TAG is evalled to get the tag to use; it must not be nil.
If no throw happens, `catch' returns the value of the last BODY form.
If a throw happens, it specifies the value to return from `catch'.
usage: (catch TAG BODY...) */)
- (Lisp_Object args)
+ (Lisp_Object tag, Lisp_Object thunk)
{
- register Lisp_Object tag;
- struct gcpro gcpro1;
-
- GCPRO1 (args);
- tag = eval_sub (XCAR (args));
- UNGCPRO;
- return internal_catch (tag, Fprogn, XCDR (args));
+ return internal_catch (tag, call0, thunk);
}
/* Assert that E is true, as a comment only. Use this instead of
#define clobbered_eassert(E) ((void) 0)
+static void
+set_handlerlist (void *data)
+{
+ handlerlist = data;
+}
+
+static void
+restore_handler (void *data)
+{
+ struct handler *c = data;
+ unblock_input_to (c->interrupt_input_blocked);
+ immediate_quit = 0;
+}
+
+struct icc_thunk_env
+{
+ enum { ICC_0, ICC_1, ICC_2, ICC_3, ICC_N } type;
+ union
+ {
+ Lisp_Object (*fun0) (void);
+ Lisp_Object (*fun1) (Lisp_Object);
+ Lisp_Object (*fun2) (Lisp_Object, Lisp_Object);
+ Lisp_Object (*fun3) (Lisp_Object, Lisp_Object, Lisp_Object);
+ Lisp_Object (*funn) (ptrdiff_t, Lisp_Object *);
+ };
+ union
+ {
+ struct
+ {
+ Lisp_Object arg1;
+ Lisp_Object arg2;
+ Lisp_Object arg3;
+ };
+ struct
+ {
+ ptrdiff_t nargs;
+ Lisp_Object *args;
+ };
+ };
+ struct handler *c;
+};
+
+static Lisp_Object
+icc_thunk (void *data)
+{
+ Lisp_Object tem;
+ struct icc_thunk_env *e = data;
+ scm_dynwind_begin (0);
+ scm_dynwind_unwind_handler (restore_handler, e->c, 0);
+ scm_dynwind_unwind_handler (set_handlerlist,
+ handlerlist,
+ SCM_F_WIND_EXPLICITLY);
+ handlerlist = e->c;
+ switch (e->type)
+ {
+ case ICC_0:
+ tem = e->fun0 ();
+ break;
+ case ICC_1:
+ tem = e->fun1 (e->arg1);
+ break;
+ case ICC_2:
+ tem = e->fun2 (e->arg1, e->arg2);
+ break;
+ case ICC_3:
+ tem = e->fun3 (e->arg1, e->arg2, e->arg3);
+ break;
+ case ICC_N:
+ tem = e->funn (e->nargs, e->args);
+ break;
+ default:
+ emacs_abort ();
+ }
+ scm_dynwind_end ();
+ return tem;
+}
+
+static Lisp_Object
+icc_handler (void *data, Lisp_Object k, Lisp_Object v)
+{
+ Lisp_Object (*f) (Lisp_Object) = data;
+ return f (v);
+}
+
+struct icc_handler_n_env
+{
+ Lisp_Object (*fun) (Lisp_Object, ptrdiff_t, Lisp_Object *);
+ ptrdiff_t nargs;
+ Lisp_Object *args;
+};
+
+static Lisp_Object
+icc_handler_n (void *data, Lisp_Object k, Lisp_Object v)
+{
+ struct icc_handler_n_env *e = data;
+ return e->fun (v, e->nargs, e->args);
+}
+
+static Lisp_Object
+icc_lisp_handler (void *data, Lisp_Object k, Lisp_Object val)
+{
+ Lisp_Object tem;
+ struct handler *h = data;
+ Lisp_Object var = h->var;
+ scm_dynwind_begin (0);
+ if (!NILP (var))
+ {
+#if 0
+ if (!NILP (Vinternal_interpreter_environment))
+ specbind (Qinternal_interpreter_environment,
+ Fcons (Fcons (var, val),
+ Vinternal_interpreter_environment));
+ else
+#endif
+ specbind (var, val);
+ }
+ tem = Fprogn (h->body);
+ scm_dynwind_end ();
+ return tem;
+}
+
/* Set up a catch, then call C function FUNC on argument ARG.
FUNC should return a Lisp_Object.
This is how catches are done from within C code. */
Lisp_Object
internal_catch (Lisp_Object tag, Lisp_Object (*func) (Lisp_Object), Lisp_Object arg)
{
- /* This structure is made part of the chain `catchlist'. */
- struct handler *c;
-
- /* Fill in the components of c, and put it on the list. */
- PUSH_HANDLER (c, tag, CATCHER);
-
- /* Call FUNC. */
- if (! sys_setjmp (c->jmp))
- {
- Lisp_Object val = (*func) (arg);
- clobbered_eassert (handlerlist == c);
- handlerlist = handlerlist->next;
- return val;
- }
- else
- { /* Throw works by a longjmp that comes right here. */
- Lisp_Object val = handlerlist->val;
- clobbered_eassert (handlerlist == c);
- handlerlist = handlerlist->next;
- return val;
- }
+ struct handler *c = make_catch_handler (tag);
+ struct icc_thunk_env env = { .type = ICC_1,
+ .fun1 = func,
+ .arg1 = arg,
+ .c = c };
+ return call_with_prompt (c->ptag,
+ make_c_closure (icc_thunk, &env, 0, 0),
+ make_c_closure (icc_handler, Fidentity, 2, 0));
}
/* Unwind the specbind, catch, and handler stacks back to CATCH, and
static _Noreturn void
unwind_to_catch (struct handler *catch, Lisp_Object value)
{
- bool last_time;
-
- eassert (catch->next);
-
- /* Save the value in the tag. */
- catch->val = value;
-
- /* Restore certain special C variables. */
- set_poll_suppress_count (catch->poll_suppress_count);
- unblock_input_to (catch->interrupt_input_blocked);
- immediate_quit = 0;
-
- do
- {
- /* Unwind the specpdl stack, and then restore the proper set of
- handlers. */
- unbind_to_1 (handlerlist->pdlcount, Qnil, false);
- last_time = handlerlist == catch;
- if (! last_time)
- handlerlist = handlerlist->next;
- }
- while (! last_time);
-
- eassert (handlerlist == catch);
-
- gcprolist = catch->gcpro;
-#ifdef DEBUG_GCPRO
- gcpro_level = gcprolist ? gcprolist->level + 1 : 0;
-#endif
- lisp_eval_depth = catch->lisp_eval_depth;
-
- sys_longjmp (catch->jmp, 1);
+ abort_to_prompt (catch->ptag, scm_list_1 (value));
}
DEFUN ("throw", Fthrow, Sthrow, 2, 2, 0,
}
xsignal2 (Qno_catch, tag, value);
}
-
-
-DEFUN ("unwind-protect", Funwind_protect, Sunwind_protect, 1, UNEVALLED, 0,
- doc: /* Do BODYFORM, protecting with UNWINDFORMS.
-If BODYFORM completes normally, its value is returned
-after executing the UNWINDFORMS.
-If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway.
-usage: (unwind-protect BODYFORM UNWINDFORMS...) */)
- (Lisp_Object args)
-{
- Lisp_Object val;
- dynwind_begin ();
-
- record_unwind_protect (unwind_body, XCDR (args));
- val = eval_sub (XCAR (args));
- dynwind_end ();
- return val;
-}
\f
-DEFUN ("condition-case", Fcondition_case, Scondition_case, 2, UNEVALLED, 0,
+DEFUN ("call-with-handler", Fcall_with_handler, Scall_with_handler, 4, 4, 0,
doc: /* Regain control when an error is signaled.
Executes BODYFORM and returns its value if no error happens.
Each element of HANDLERS looks like (CONDITION-NAME BODY...)
See also the function `signal' for more info.
usage: (condition-case VAR BODYFORM &rest HANDLERS) */)
- (Lisp_Object args)
+ (Lisp_Object var,
+ Lisp_Object conditions,
+ Lisp_Object hthunk,
+ Lisp_Object thunk)
{
- Lisp_Object var = XCAR (args);
- Lisp_Object bodyform = XCAR (XCDR (args));
- Lisp_Object handlers = XCDR (XCDR (args));
+ return internal_lisp_condition_case (var,
+ list2 (intern ("funcall"), thunk),
+ list1 (list2 (conditions, list2 (intern ("funcall"), hthunk))));
+}
- return internal_lisp_condition_case (var, bodyform, handlers);
+static Lisp_Object
+ilcc1 (Lisp_Object var, Lisp_Object bodyform, Lisp_Object handlers)
+{
+ if (CONSP (handlers))
+ {
+ Lisp_Object clause = XCAR (handlers);
+ Lisp_Object condition = XCAR (clause);
+ Lisp_Object body = XCDR (clause);
+ if (!CONSP (condition))
+ condition = Fcons (condition, Qnil);
+ struct handler *c = make_condition_handler (condition);
+ c->var = var;
+ c->body = body;
+ struct icc_thunk_env env = { .type = ICC_3,
+ .fun3 = ilcc1,
+ .arg1 = var,
+ .arg2 = bodyform,
+ .arg3 = XCDR (handlers),
+ .c = c };
+ return call_with_prompt (c->ptag,
+ make_c_closure (icc_thunk, &env, 0, 0),
+ make_c_closure (icc_lisp_handler, c, 2, 0));
+ }
+ else
+ {
+ return eval_sub (bodyform);
+ }
}
/* Like Fcondition_case, but the args are separate
Lisp_Object val;
struct handler *c;
struct handler *oldhandlerlist = handlerlist;
- int clausenb = 0;
CHECK_SYMBOL (var);
for (val = handlers; CONSP (val); val = XCDR (val))
{
Lisp_Object tem = XCAR (val);
- clausenb++;
if (! (NILP (tem)
|| (CONSP (tem)
&& (SYMBOLP (XCAR (tem))
SDATA (Fprin1_to_string (tem, Qt)));
}
- { /* The first clause is the one that should be checked first, so it should
- be added to handlerlist last. So we build in `clauses' a table that
- contains `handlers' but in reverse order. */
- Lisp_Object *clauses = alloca (clausenb * sizeof (Lisp_Object *));
- Lisp_Object *volatile clauses_volatile = clauses;
- int i = clausenb;
- for (val = handlers; CONSP (val); val = XCDR (val))
- clauses[--i] = XCAR (val);
- for (i = 0; i < clausenb; i++)
- {
- Lisp_Object clause = clauses[i];
- Lisp_Object condition = XCAR (clause);
- if (!CONSP (condition))
- condition = Fcons (condition, Qnil);
- PUSH_HANDLER (c, condition, CONDITION_CASE);
- if (sys_setjmp (c->jmp))
- {
- ptrdiff_t count = SPECPDL_INDEX ();
- Lisp_Object val = handlerlist->val;
- Lisp_Object *chosen_clause = clauses_volatile;
- for (c = handlerlist->next; c != oldhandlerlist; c = c->next)
- chosen_clause++;
- handlerlist = oldhandlerlist;
- if (!NILP (var))
- {
- if (!NILP (Vinternal_interpreter_environment))
- specbind (Qinternal_interpreter_environment,
- Fcons (Fcons (var, val),
- Vinternal_interpreter_environment));
- else
- specbind (var, val);
- }
- val = Fprogn (XCDR (*chosen_clause));
- /* Note that this just undoes the binding of var; whoever
- longjumped to us unwound the stack to c.pdlcount before
- throwing. */
- if (!NILP (var))
- unbind_to (count, Qnil);
- return val;
- }
- }
- }
-
- val = eval_sub (bodyform);
- handlerlist = oldhandlerlist;
- return val;
+ return ilcc1 (var, bodyform, Freverse (handlers));
}
/* Call the function BFUN with no arguments, catching errors within it
Lisp_Object (*hfun) (Lisp_Object))
{
Lisp_Object val;
- struct handler *c;
-
- PUSH_HANDLER (c, handlers, CONDITION_CASE);
- if (sys_setjmp (c->jmp))
- {
- Lisp_Object val = handlerlist->val;
- clobbered_eassert (handlerlist == c);
- handlerlist = handlerlist->next;
- return (*hfun) (val);
- }
+ struct handler *c = make_condition_handler (handlers);
- val = (*bfun) ();
- clobbered_eassert (handlerlist == c);
- handlerlist = handlerlist->next;
- return val;
+ struct icc_thunk_env env = { .type = ICC_0, .fun0 = bfun, .c = c };
+ return call_with_prompt (c->ptag,
+ make_c_closure (icc_thunk, &env, 0, 0),
+ make_c_closure (icc_handler, hfun, 2, 0));
}
/* Like internal_condition_case but call BFUN with ARG as its argument. */
Lisp_Object handlers, Lisp_Object (*hfun) (Lisp_Object))
{
Lisp_Object val;
- struct handler *c;
+ struct handler *c = make_condition_handler (handlers);
- PUSH_HANDLER (c, handlers, CONDITION_CASE);
- if (sys_setjmp (c->jmp))
- {
- Lisp_Object val = handlerlist->val;
- clobbered_eassert (handlerlist == c);
- handlerlist = handlerlist->next;
- return (*hfun) (val);
- }
-
- val = (*bfun) (arg);
- clobbered_eassert (handlerlist == c);
- handlerlist = handlerlist->next;
- return val;
+ struct icc_thunk_env env = { .type = ICC_1,
+ .fun1 = bfun,
+ .arg1 = arg,
+ .c = c };
+ return call_with_prompt (c->ptag,
+ make_c_closure (icc_thunk, &env, 0, 0),
+ make_c_closure (icc_handler, hfun, 2, 0));
}
/* Like internal_condition_case_1 but call BFUN with ARG1 and ARG2 as
Lisp_Object (*hfun) (Lisp_Object))
{
Lisp_Object val;
- struct handler *c;
-
- PUSH_HANDLER (c, handlers, CONDITION_CASE);
- if (sys_setjmp (c->jmp))
- {
- Lisp_Object val = handlerlist->val;
- clobbered_eassert (handlerlist == c);
- handlerlist = handlerlist->next;
- return (*hfun) (val);
- }
-
- val = (*bfun) (arg1, arg2);
- clobbered_eassert (handlerlist == c);
- handlerlist = handlerlist->next;
- return val;
+ struct handler *c = make_condition_handler (handlers);
+ struct icc_thunk_env env = { .type = ICC_2,
+ .fun2 = bfun,
+ .arg1 = arg1,
+ .arg2 = arg2,
+ .c = c };
+ return call_with_prompt (c->ptag,
+ make_c_closure (icc_thunk, &env, 0, 0),
+ make_c_closure (icc_handler, hfun, 2, 0));
}
/* Like internal_condition_case but call BFUN with NARGS as first,
Lisp_Object *args))
{
Lisp_Object val;
- struct handler *c;
-
- PUSH_HANDLER (c, handlers, CONDITION_CASE);
- if (sys_setjmp (c->jmp))
- {
- Lisp_Object val = handlerlist->val;
- clobbered_eassert (handlerlist == c);
- handlerlist = handlerlist->next;
- return (*hfun) (val, nargs, args);
- }
+ struct handler *c = make_condition_handler (handlers);
- val = (*bfun) (nargs, args);
- clobbered_eassert (handlerlist == c);
- handlerlist = handlerlist->next;
- return val;
+ struct icc_thunk_env env = { .type = ICC_N,
+ .funn = bfun,
+ .nargs = nargs,
+ .args = args,
+ .c = c };
+ struct icc_handler_n_env henv = { .fun = hfun, .nargs = nargs, .args = args };
+ return call_with_prompt (c->ptag,
+ make_c_closure (icc_thunk, &env, 0, 0),
+ make_c_closure (icc_handler_n, &henv, 2, 0));
}
\f
}
else
{
- if (handlerlist != &handlerlist_sentinel)
+ if (handlerlist != handlerlist_sentinel)
/* FIXME: This will come right back here if there's no `top-level'
catcher. A better solution would be to abort here, and instead
add a catch-all condition handler so we never come here. */
fun = Fsymbol_function (fun);
}
- /* Emacs primitives are interactive if their DEFUN specifies an
- interactive spec. */
- if (SUBRP (fun))
- return XSUBR (fun)->intspec ? Qt : if_prop;
-
+ if (scm_is_true (scm_procedure_p (fun)))
+ return (scm_is_pair (scm_assq (Qinteractive_form,
+ scm_procedure_properties (fun)))
+ ? Qt : if_prop);
/* Bytecode objects are interactive if they are long enough to
have an element whose index is COMPILED_INTERACTIVE, which is
where the interactive spec is stored. */
CHECK_STRING (file);
/* If function is defined and not as an autoload, don't override. */
- if (!NILP (XSYMBOL (function)->function)
- && !AUTOLOADP (XSYMBOL (function)->function))
+ if (!NILP (SYMBOL_FUNCTION (function))
+ && !AUTOLOADP (SYMBOL_FUNCTION (function)))
return Qnil;
return Fdefalias (function,
specpdl_ptr->bt.args = args;
specpdl_ptr->bt.nargs = nargs;
grow_specpdl ();
+ scm_dynwind_unwind_handler (unbind_once, NULL, SCM_F_WIND_EXPLICITLY);
+}
+
+static void
+set_lisp_eval_depth (void *data)
+{
+ EMACS_INT n = (EMACS_INT) data;
+ lisp_eval_depth = n;
}
/* Eval a sub-expression of the current expression (i.e. in the same
lexical scope). */
-Lisp_Object
-eval_sub (Lisp_Object form)
+static Lisp_Object
+eval_sub_1 (Lisp_Object form)
{
- Lisp_Object fun, val, original_fun, original_args;
- Lisp_Object funcar;
- struct gcpro gcpro1, gcpro2, gcpro3;
-
- if (SYMBOLP (form))
- {
- /* Look up its binding in the lexical environment.
- We do not pay attention to the declared_special flag here, since we
- already did that when let-binding the variable. */
- Lisp_Object lex_binding
- = !NILP (Vinternal_interpreter_environment) /* Mere optimization! */
- ? Fassq (form, Vinternal_interpreter_environment)
- : Qnil;
- if (CONSP (lex_binding))
- return XCDR (lex_binding);
- else
- return Fsymbol_value (form);
- }
-
- if (!CONSP (form))
- return form;
-
QUIT;
+ return scm_call_1 (eval_fn, form);
+}
- GCPRO1 (form);
- maybe_gc ();
- UNGCPRO;
-
- if (++lisp_eval_depth > max_lisp_eval_depth)
- {
- if (max_lisp_eval_depth < 100)
- max_lisp_eval_depth = 100;
- if (lisp_eval_depth > max_lisp_eval_depth)
- error ("Lisp nesting exceeds `max-lisp-eval-depth'");
- }
-
- original_fun = XCAR (form);
- original_args = XCDR (form);
-
- /* This also protects them from gc. */
- record_in_backtrace (original_fun, &original_args, UNEVALLED);
-
- if (debug_on_next_call)
- do_debug_on_call (Qt);
-
- /* At this point, only original_fun and original_args
- have values that will be used below. */
- retry:
-
- /* Optimize for no indirection. */
- fun = original_fun;
- if (!SYMBOLP (fun))
- fun = Ffunction (Fcons (fun, Qnil));
- else if (!NILP (fun) && (fun = XSYMBOL (fun)->function, SYMBOLP (fun)))
- fun = indirect_function (fun);
-
- if (SUBRP (fun))
- {
- Lisp_Object numargs;
- Lisp_Object argvals[8];
- Lisp_Object args_left;
- register int i, maxargs;
-
- args_left = original_args;
- numargs = Flength (args_left);
-
- if (XINT (numargs) < XSUBR (fun)->min_args
- || (XSUBR (fun)->max_args >= 0
- && XSUBR (fun)->max_args < XINT (numargs)))
- xsignal2 (Qwrong_number_of_arguments, original_fun, numargs);
-
- else if (XSUBR (fun)->max_args == UNEVALLED)
- val = (XSUBR (fun)->function.aUNEVALLED) (args_left);
- else if (XSUBR (fun)->max_args == MANY)
- {
- /* Pass a vector of evaluated arguments. */
- Lisp_Object *vals;
- ptrdiff_t argnum = 0;
- USE_SAFE_ALLOCA;
-
- SAFE_ALLOCA_LISP (vals, XINT (numargs));
-
- GCPRO3 (args_left, fun, fun);
- gcpro3.var = vals;
- gcpro3.nvars = 0;
-
- while (!NILP (args_left))
- {
- vals[argnum++] = eval_sub (Fcar (args_left));
- args_left = Fcdr (args_left);
- gcpro3.nvars = argnum;
- }
-
- set_backtrace_args (specpdl_ptr - 1, vals);
- set_backtrace_nargs (specpdl_ptr - 1, XINT (numargs));
-
- val = (XSUBR (fun)->function.aMANY) (XINT (numargs), vals);
- UNGCPRO;
- SAFE_FREE ();
- }
- else
- {
- GCPRO3 (args_left, fun, fun);
- gcpro3.var = argvals;
- gcpro3.nvars = 0;
-
- maxargs = XSUBR (fun)->max_args;
- for (i = 0; i < maxargs; args_left = Fcdr (args_left))
- {
- argvals[i] = eval_sub (Fcar (args_left));
- gcpro3.nvars = ++i;
- }
-
- UNGCPRO;
-
- set_backtrace_args (specpdl_ptr - 1, argvals);
- set_backtrace_nargs (specpdl_ptr - 1, XINT (numargs));
-
- switch (i)
- {
- case 0:
- val = (XSUBR (fun)->function.a0 ());
- break;
- case 1:
- val = (XSUBR (fun)->function.a1 (argvals[0]));
- break;
- case 2:
- val = (XSUBR (fun)->function.a2 (argvals[0], argvals[1]));
- break;
- case 3:
- val = (XSUBR (fun)->function.a3
- (argvals[0], argvals[1], argvals[2]));
- break;
- case 4:
- val = (XSUBR (fun)->function.a4
- (argvals[0], argvals[1], argvals[2], argvals[3]));
- break;
- case 5:
- val = (XSUBR (fun)->function.a5
- (argvals[0], argvals[1], argvals[2], argvals[3],
- argvals[4]));
- break;
- case 6:
- val = (XSUBR (fun)->function.a6
- (argvals[0], argvals[1], argvals[2], argvals[3],
- argvals[4], argvals[5]));
- break;
- case 7:
- val = (XSUBR (fun)->function.a7
- (argvals[0], argvals[1], argvals[2], argvals[3],
- argvals[4], argvals[5], argvals[6]));
- break;
-
- case 8:
- val = (XSUBR (fun)->function.a8
- (argvals[0], argvals[1], argvals[2], argvals[3],
- argvals[4], argvals[5], argvals[6], argvals[7]));
- break;
-
- default:
- /* Someone has created a subr that takes more arguments than
- is supported by this code. We need to either rewrite the
- subr to use a different argument protocol, or add more
- cases to this switch. */
- emacs_abort ();
- }
- }
- }
- else if (COMPILEDP (fun))
- val = apply_lambda (fun, original_args);
- else
- {
- if (NILP (fun))
- xsignal1 (Qvoid_function, original_fun);
- if (!CONSP (fun))
- xsignal1 (Qinvalid_function, original_fun);
- funcar = XCAR (fun);
- if (!SYMBOLP (funcar))
- xsignal1 (Qinvalid_function, original_fun);
- if (EQ (funcar, Qautoload))
- {
- Fautoload_do_load (fun, original_fun, Qnil);
- goto retry;
- }
- if (EQ (funcar, Qmacro))
- {
- dynwind_begin ();
- Lisp_Object exp;
- /* Bind lexical-binding during expansion of the macro, so the
- macro can know reliably if the code it outputs will be
- interpreted using lexical-binding or not. */
- specbind (Qlexical_binding,
- NILP (Vinternal_interpreter_environment) ? Qnil : Qt);
- exp = apply1 (Fcdr (fun), original_args);
- dynwind_end ();
- val = eval_sub (exp);
- }
- else if (EQ (funcar, Qlambda)
- || EQ (funcar, Qclosure))
- val = apply_lambda (fun, original_args);
- else
- xsignal1 (Qinvalid_function, original_fun);
- }
+Lisp_Object
+eval_sub (Lisp_Object form)
+{
+ return scm_c_value_ref (eval_sub_1 (form), 0);
+}
+\f
+static Lisp_Object
+values_to_list (Lisp_Object values)
+{
+ Lisp_Object list = Qnil;
+ for (int i = scm_c_nvalues (values) - 1; i >= 0; i--)
+ list = Fcons (scm_c_value_ref (values, i), list);
+ return list;
+}
- lisp_eval_depth--;
- if (backtrace_debug_on_exit (specpdl_ptr - 1))
- val = call_debugger (list2 (Qexit, val));
- specpdl_ptr--;
+DEFUN ("multiple-value-call", Fmultiple_value_call, Smultiple_value_call,
+ 2, UNEVALLED, 0,
+ doc: /* Call with multiple values.
+usage: (multiple-value-call FUNCTION-FORM FORM) */)
+ (Lisp_Object args)
+{
+ Lisp_Object function_form = eval_sub (XCAR (args));
+ Lisp_Object values = Qnil;
+ while (CONSP (args = XCDR (args)))
+ values = nconc2 (Fnreverse (values_to_list (eval_sub_1 (XCAR (args)))),
+ values);
+ return apply1 (function_form, Fnreverse (values));
+}
- return val;
+DEFUN ("values", Fvalues, Svalues, 0, MANY, 0,
+ doc: /* Return multiple values. */)
+ (ptrdiff_t nargs, Lisp_Object *args)
+{
+ return scm_c_values (args, nargs);
}
\f
-DEFUN ("apply", Fapply, Sapply, 1, MANY, 0,
- doc: /* Call FUNCTION with our remaining args, using our last arg as list of args.
-Then return the value FUNCTION returns.
-Thus, (apply '+ 1 2 '(3 4)) returns 10.
-usage: (apply FUNCTION &rest ARGUMENTS) */)
- (ptrdiff_t nargs, Lisp_Object *args)
+Lisp_Object
+Fapply (ptrdiff_t nargs, Lisp_Object *args)
{
ptrdiff_t i;
EMACS_INT numargs;
/* Optimize for no indirection. */
if (SYMBOLP (fun) && !NILP (fun)
- && (fun = XSYMBOL (fun)->function, SYMBOLP (fun)))
+ && (fun = SYMBOL_FUNCTION (fun), SYMBOLP (fun)))
fun = indirect_function (fun);
if (NILP (fun))
{
/* Let funcall get the error. */
fun = args[0];
- goto funcall;
}
- if (SUBRP (fun))
- {
- if (numargs < XSUBR (fun)->min_args
- || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs))
- goto funcall; /* Let funcall get the error. */
- else if (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args > numargs)
- {
- /* Avoid making funcall cons up a yet another new vector of arguments
- by explicitly supplying nil's for optional values. */
- SAFE_ALLOCA_LISP (funcall_args, 1 + XSUBR (fun)->max_args);
- for (i = numargs; i < XSUBR (fun)->max_args;)
- funcall_args[++i] = Qnil;
- GCPRO1 (*funcall_args);
- gcpro1.nvars = 1 + XSUBR (fun)->max_args;
- }
- }
- funcall:
/* We add 1 to numargs because funcall_args includes the
function itself as well as its arguments. */
if (!funcall_args)
return Qnil;
}
-DEFUN ("funcall", Ffuncall, Sfuncall, 1, MANY, 0,
- doc: /* Call first argument as a function, passing remaining arguments to it.
-Return the value that function returns.
-Thus, (funcall 'cons 'x 'y) returns (x . y).
-usage: (funcall FUNCTION &rest ARGUMENTS) */)
- (ptrdiff_t nargs, Lisp_Object *args)
+static Lisp_Object
+Ffuncall1 (ptrdiff_t nargs, Lisp_Object *args)
{
- Lisp_Object fun, original_fun;
- Lisp_Object funcar;
- ptrdiff_t numargs = nargs - 1;
- Lisp_Object lisp_numargs;
- Lisp_Object val;
- register Lisp_Object *internal_args;
- ptrdiff_t i;
-
- QUIT;
-
- if (++lisp_eval_depth > max_lisp_eval_depth)
- {
- if (max_lisp_eval_depth < 100)
- max_lisp_eval_depth = 100;
- if (lisp_eval_depth > max_lisp_eval_depth)
- error ("Lisp nesting exceeds `max-lisp-eval-depth'");
- }
-
- /* This also GCPROs them. */
- record_in_backtrace (args[0], &args[1], nargs - 1);
-
- /* Call GC after setting up the backtrace, so the latter GCPROs the args. */
- maybe_gc ();
-
- if (debug_on_next_call)
- do_debug_on_call (Qlambda);
-
- original_fun = args[0];
-
- retry:
-
- /* Optimize for no indirection. */
- fun = original_fun;
- if (SYMBOLP (fun) && !NILP (fun)
- && (fun = XSYMBOL (fun)->function, SYMBOLP (fun)))
- fun = indirect_function (fun);
-
- if (SUBRP (fun))
- {
- if (numargs < XSUBR (fun)->min_args
- || (XSUBR (fun)->max_args >= 0 && XSUBR (fun)->max_args < numargs))
- {
- XSETFASTINT (lisp_numargs, numargs);
- xsignal2 (Qwrong_number_of_arguments, original_fun, lisp_numargs);
- }
-
- else if (XSUBR (fun)->max_args == UNEVALLED)
- xsignal1 (Qinvalid_function, original_fun);
+ return scm_call_n (funcall_fn, args, nargs);
+}
- else if (XSUBR (fun)->max_args == MANY)
- val = (XSUBR (fun)->function.aMANY) (numargs, args + 1);
- else
- {
- if (XSUBR (fun)->max_args > numargs)
- {
- internal_args = alloca (XSUBR (fun)->max_args
- * sizeof *internal_args);
- memcpy (internal_args, args + 1, numargs * word_size);
- for (i = numargs; i < XSUBR (fun)->max_args; i++)
- internal_args[i] = Qnil;
- }
- else
- internal_args = args + 1;
- switch (XSUBR (fun)->max_args)
- {
- case 0:
- val = (XSUBR (fun)->function.a0 ());
- break;
- case 1:
- val = (XSUBR (fun)->function.a1 (internal_args[0]));
- break;
- case 2:
- val = (XSUBR (fun)->function.a2
- (internal_args[0], internal_args[1]));
- break;
- case 3:
- val = (XSUBR (fun)->function.a3
- (internal_args[0], internal_args[1], internal_args[2]));
- break;
- case 4:
- val = (XSUBR (fun)->function.a4
- (internal_args[0], internal_args[1], internal_args[2],
- internal_args[3]));
- break;
- case 5:
- val = (XSUBR (fun)->function.a5
- (internal_args[0], internal_args[1], internal_args[2],
- internal_args[3], internal_args[4]));
- break;
- case 6:
- val = (XSUBR (fun)->function.a6
- (internal_args[0], internal_args[1], internal_args[2],
- internal_args[3], internal_args[4], internal_args[5]));
- break;
- case 7:
- val = (XSUBR (fun)->function.a7
- (internal_args[0], internal_args[1], internal_args[2],
- internal_args[3], internal_args[4], internal_args[5],
- internal_args[6]));
- break;
-
- case 8:
- val = (XSUBR (fun)->function.a8
- (internal_args[0], internal_args[1], internal_args[2],
- internal_args[3], internal_args[4], internal_args[5],
- internal_args[6], internal_args[7]));
- break;
-
- default:
-
- /* If a subr takes more than 8 arguments without using MANY
- or UNEVALLED, we need to extend this function to support it.
- Until this is done, there is no way to call the function. */
- emacs_abort ();
- }
- }
- }
- else if (COMPILEDP (fun))
- val = funcall_lambda (fun, numargs, args + 1);
- else
- {
- if (NILP (fun))
- xsignal1 (Qvoid_function, original_fun);
- if (!CONSP (fun))
- xsignal1 (Qinvalid_function, original_fun);
- funcar = XCAR (fun);
- if (!SYMBOLP (funcar))
- xsignal1 (Qinvalid_function, original_fun);
- if (EQ (funcar, Qlambda)
- || EQ (funcar, Qclosure))
- val = funcall_lambda (fun, numargs, args + 1);
- else if (EQ (funcar, Qautoload))
- {
- Fautoload_do_load (fun, original_fun, Qnil);
- goto retry;
- }
- else
- xsignal1 (Qinvalid_function, original_fun);
- }
- lisp_eval_depth--;
- if (backtrace_debug_on_exit (specpdl_ptr - 1))
- val = call_debugger (list2 (Qexit, val));
- specpdl_ptr--;
- return val;
+Lisp_Object
+Ffuncall (ptrdiff_t nargs, Lisp_Object *args)
+{
+ return scm_c_value_ref (Ffuncall1 (nargs, args), 0);
}
\f
static Lisp_Object
for (i = 0; i < numargs; )
{
tem = Fcar (args_left), args_left = Fcdr (args_left);
- tem = eval_sub (tem);
arg_vector[i++] = tem;
gcpro1.nvars = i;
}
UNGCPRO;
- set_backtrace_args (specpdl_ptr - 1, arg_vector);
- set_backtrace_nargs (specpdl_ptr - 1, i);
+ //set_backtrace_args (specpdl_ptr - 1, arg_vector);
+ //set_backtrace_nargs (specpdl_ptr - 1, i);
tem = funcall_lambda (fun, numargs, arg_vector);
/* Do the debug-on-exit now, while arg_vector still exists. */
which was made in the buffer that is now current. */
bool
-let_shadows_buffer_binding_p (struct Lisp_Symbol *symbol)
+let_shadows_buffer_binding_p (sym_t symbol)
{
union specbinding *p;
Lisp_Object buf = Fcurrent_buffer ();
for (p = specpdl_ptr; p > specpdl; )
if ((--p)->kind > SPECPDL_LET)
{
- struct Lisp_Symbol *let_bound_symbol = XSYMBOL (specpdl_symbol (p));
- eassert (let_bound_symbol->redirect != SYMBOL_VARALIAS);
+ sym_t let_bound_symbol = XSYMBOL (specpdl_symbol (p));
+ eassert (SYMBOL_REDIRECT (let_bound_symbol) != SYMBOL_VARALIAS);
if (symbol == let_bound_symbol
&& EQ (specpdl_where (p), buf))
return 1;
void
specbind (Lisp_Object symbol, Lisp_Object value)
{
- struct Lisp_Symbol *sym;
+ sym_t sym;
CHECK_SYMBOL (symbol);
sym = XSYMBOL (symbol);
start:
- switch (sym->redirect)
+ switch (SYMBOL_REDIRECT (sym))
{
case SYMBOL_VARALIAS:
sym = indirect_variable (sym); XSETSYMBOL (symbol, sym); goto start;
specpdl_ptr->let.symbol = symbol;
specpdl_ptr->let.old_value = SYMBOL_VAL (sym);
grow_specpdl ();
- if (!sym->constant)
+ if (! SYMBOL_CONSTANT (sym))
SET_SYMBOL_VAL (sym, value);
else
set_internal (symbol, value, Qnil, 1);
specpdl_ptr->let.old_value = ovalue;
specpdl_ptr->let.where = Fcurrent_buffer ();
- eassert (sym->redirect != SYMBOL_LOCALIZED
+ eassert (SYMBOL_REDIRECT (sym) != SYMBOL_LOCALIZED
|| (EQ (SYMBOL_BLV (sym)->where, Fcurrent_buffer ())));
- if (sym->redirect == SYMBOL_LOCALIZED)
+ if (SYMBOL_REDIRECT (sym) == SYMBOL_LOCALIZED)
{
if (!blv_found (SYMBOL_BLV (sym)))
specpdl_ptr->let.kind = SPECPDL_LET_DEFAULT;
specpdl_ptr->let.kind = SPECPDL_LET_DEFAULT;
grow_specpdl ();
Fset_default (symbol, value);
- return;
+ goto done;
}
}
else
}
default: emacs_abort ();
}
+
+ done:
+ scm_dynwind_unwind_handler (unbind_once, NULL, SCM_F_WIND_EXPLICITLY);
}
/* Push unwind-protect entries of various types. */
record_unwind_protect_1 (void (*function) (Lisp_Object), Lisp_Object arg,
bool wind_explicitly)
{
- specpdl_ptr->unwind.kind = SPECPDL_UNWIND;
- specpdl_ptr->unwind.func = function;
- specpdl_ptr->unwind.arg = arg;
- specpdl_ptr->unwind.wind_explicitly = wind_explicitly;
- grow_specpdl ();
+ record_unwind_protect_ptr_1 (function, arg, wind_explicitly);
}
void
record_unwind_protect_ptr_1 (void (*function) (void *), void *arg,
bool wind_explicitly)
{
- specpdl_ptr->unwind_ptr.kind = SPECPDL_UNWIND_PTR;
- specpdl_ptr->unwind_ptr.func = function;
- specpdl_ptr->unwind_ptr.arg = arg;
- specpdl_ptr->unwind_ptr.wind_explicitly = wind_explicitly;
- grow_specpdl ();
+ scm_dynwind_unwind_handler (function,
+ arg,
+ (wind_explicitly
+ ? SCM_F_WIND_EXPLICITLY
+ : 0));
}
void
record_unwind_protect_int_1 (void (*function) (int), int arg,
bool wind_explicitly)
{
- specpdl_ptr->unwind_int.kind = SPECPDL_UNWIND_INT;
- specpdl_ptr->unwind_int.func = function;
- specpdl_ptr->unwind_int.arg = arg;
- specpdl_ptr->unwind_int.wind_explicitly = wind_explicitly;
- grow_specpdl ();
+ record_unwind_protect_ptr_1 (function, arg, wind_explicitly);
}
void
record_unwind_protect_int_1 (function, arg, true);
}
+static void
+call_void (void *data)
+{
+ ((void (*) (void)) data) ();
+}
+
void
record_unwind_protect_void_1 (void (*function) (void),
bool wind_explicitly)
{
- specpdl_ptr->unwind_void.kind = SPECPDL_UNWIND_VOID;
- specpdl_ptr->unwind_void.func = function;
- specpdl_ptr->unwind_void.wind_explicitly = wind_explicitly;
- grow_specpdl ();
+ record_unwind_protect_ptr_1 (call_void, function, wind_explicitly);
}
void
record_unwind_protect_void_1 (function, true);
}
-void
-unbind_once (bool explicit)
+static void
+unbind_once (void *ignore)
{
/* Decrement specpdl_ptr before we do the work to unbind it, so
that an error in unbinding won't try to unbind the same entry
switch (specpdl_ptr->kind)
{
- case SPECPDL_UNWIND:
- if (specpdl_ptr->unwind.wind_explicitly || ! explicit)
- specpdl_ptr->unwind.func (specpdl_ptr->unwind.arg);
- break;
- case SPECPDL_UNWIND_PTR:
- if (specpdl_ptr->unwind_ptr.wind_explicitly || ! explicit)
- specpdl_ptr->unwind_ptr.func (specpdl_ptr->unwind_ptr.arg);
- break;
- case SPECPDL_UNWIND_INT:
- if (specpdl_ptr->unwind_int.wind_explicitly || ! explicit)
- specpdl_ptr->unwind_int.func (specpdl_ptr->unwind_int.arg);
- break;
- case SPECPDL_UNWIND_VOID:
- if (specpdl_ptr->unwind_void.wind_explicitly || ! explicit)
- specpdl_ptr->unwind_void.func ();
- break;
case SPECPDL_BACKTRACE:
break;
case SPECPDL_LET:
{ /* If variable has a trivial value (no forwarding), we can
just set it. No need to check for constant symbols here,
since that was already done by specbind. */
- struct Lisp_Symbol *sym = XSYMBOL (specpdl_symbol (specpdl_ptr));
- if (sym->redirect == SYMBOL_PLAINVAL)
+ sym_t sym = XSYMBOL (specpdl_symbol (specpdl_ptr));
+ if (SYMBOL_REDIRECT (sym) == SYMBOL_PLAINVAL)
{
SET_SYMBOL_VAL (sym, specpdl_old_value (specpdl_ptr));
break;
void
dynwind_begin (void)
{
- specpdl_ptr->kind = SPECPDL_FRAME;
- grow_specpdl ();
+ scm_dynwind_begin (0);
}
void
dynwind_end (void)
{
- enum specbind_tag last;
- Lisp_Object quitf = Vquit_flag;
- union specbinding *pdl = specpdl_ptr;
-
- Vquit_flag = Qnil;
-
- do
- pdl--;
- while (pdl->kind != SPECPDL_FRAME);
-
- while (specpdl_ptr != pdl)
- unbind_once (true);
-
- Vquit_flag = quitf;
-}
-
-static Lisp_Object
-unbind_to_1 (ptrdiff_t count, Lisp_Object value, bool explicit)
-{
- Lisp_Object quitf = Vquit_flag;
- struct gcpro gcpro1, gcpro2;
-
- GCPRO2 (value, quitf);
- Vquit_flag = Qnil;
-
- while (specpdl_ptr != specpdl + count)
- unbind_once (explicit);
-
- if (NILP (Vquit_flag) && !NILP (quitf))
- Vquit_flag = quitf;
-
- UNGCPRO;
- return value;
-}
-
-Lisp_Object
-unbind_to (ptrdiff_t count, Lisp_Object value)
-{
- return unbind_to_1 (count, value, true);
+ scm_dynwind_end ();
}
DEFUN ("special-variable-p", Fspecial_variable_p, Sspecial_variable_p, 1, 1, 0,
(Lisp_Object symbol)
{
CHECK_SYMBOL (symbol);
- return XSYMBOL (symbol)->declared_special ? Qt : Qnil;
+ return SYMBOL_DECLARED_SPECIAL (XSYMBOL (symbol)) ? Qt : Qnil;
}
\f
/* */
switch (tmp->kind)
{
- /* FIXME: Ideally we'd like to "temporarily unwind" (some of) those
- unwind_protect, but the problem is that we don't know how to
- rewind them afterwards. */
- case SPECPDL_UNWIND:
- case SPECPDL_UNWIND_PTR:
- case SPECPDL_UNWIND_INT:
- case SPECPDL_UNWIND_VOID:
case SPECPDL_BACKTRACE:
break;
case SPECPDL_LET:
{ /* If variable has a trivial value (no forwarding), we can
just set it. No need to check for constant symbols here,
since that was already done by specbind. */
- struct Lisp_Symbol *sym = XSYMBOL (specpdl_symbol (tmp));
- if (sym->redirect == SYMBOL_PLAINVAL)
+ sym_t sym = XSYMBOL (specpdl_symbol (tmp));
+ if (SYMBOL_REDIRECT (sym) == SYMBOL_PLAINVAL)
{
Lisp_Object old_value = specpdl_old_value (tmp);
set_specpdl_old_value (tmp, SYMBOL_VAL (sym));
union specbinding *pdl = backtrace_top ();
return (backtrace_p (pdl) ? backtrace_function (pdl) : Qnil);
}
+\f
+_Noreturn SCM
+abort_to_prompt (SCM tag, SCM arglst)
+{
+ static SCM var = SCM_UNDEFINED;
+ if (SCM_UNBNDP (var))
+ var = scm_c_public_lookup ("guile", "abort-to-prompt");
+
+ scm_apply_1 (scm_variable_ref (var), tag, arglst);
+ emacs_abort ();
+}
+SCM
+call_with_prompt (SCM tag, SCM thunk, SCM handler)
+{
+ static SCM var = SCM_UNDEFINED;
+ if (SCM_UNBNDP (var))
+ var = scm_c_public_lookup ("guile", "call-with-prompt");
+
+ return scm_call_3 (scm_variable_ref (var), tag, thunk, handler);
+}
+
+SCM
+make_prompt_tag (void)
+{
+ static SCM var = SCM_UNDEFINED;
+ if (SCM_UNBNDP (var))
+ var = scm_c_public_lookup ("guile", "make-prompt-tag");
+
+ return scm_call_0 (scm_variable_ref (var));
+}
+\f
void
syms_of_eval (void)
{
Vinternal_interpreter_environment = Qnil;
/* 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);
+ //Funintern (Qinternal_interpreter_environment, Qnil);
DEFSYM (Vrun_hooks, "run-hooks");
HCoop / bpt / emacs.git / blobdiff