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/* Mocklisp compatibility functions for XEmacs Lisp interpreter.
Copyright (C) 1985, 1986, 1992, 1993 Free Software Foundation, Inc.
This file is part of XEmacs.
XEmacs is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
XEmacs is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with XEmacs; see the file COPYING. If not, write to the Free
Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Synched up with: FSF 19.28. */
/* Compatibility for mocklisp */
#include <config.h>
#ifdef MOCKLISP_SUPPORT /* whole file */
#include "lisp.h"
#include "buffer.h"
Lisp_Object Qmocklisp;
Lisp_Object Qmocklisp_arguments;
Lisp_Object Vmocklisp_arguments;
/* Now in lisp code ("macrocode...")
* DEFUN ("ml-defun", Fml_defun, Sml_defun, 0, UNEVALLED, 0,
* "Define mocklisp functions")
* (args)
* Lisp_Object args;
* {
* Lisp_Object elt;
*
* while (!NILP (args))
* {
* elt = Fcar (args);
* Ffset (Fcar (elt), Fcons (Qmocklisp, Fcdr (elt)));
* args = Fcdr (args);
* }
* return Qnil;
* }
*/
DEFUN ("ml-if", Fml_if, Sml_if, 0, UNEVALLED, 0, "Mocklisp version of `if'.")
(args)
Lisp_Object args;
{
/* This function can GC */
Lisp_Object val;
struct gcpro gcpro1;
GCPRO1 (args);
while (!NILP (args))
{
val = Feval (Fcar (args));
args = Fcdr (args);
if (NILP (args)) break;
if (XINT (val))
{
val = Feval (Fcar (args));
break;
}
args = Fcdr (args);
}
UNGCPRO;
return val;
}
/* Now converted to regular "while" by hairier conversion code.
* DEFUN ("ml-while", Fml_while, Sml_while, 1, UNEVALLED, 0, "while for mocklisp programs")
* (args)
* Lisp_Object args;
* {
* Lisp_Object test, body, tem;
* struct gcpro gcpro1, gcpro2;
*
* GCPRO2 (test, body);
*
* test = Fcar (args);
* body = Fcdr (args);
* while (tem = Feval (test), XINT (tem))
* {
* QUIT;
* Fprogn (body);
* }
*
* UNGCPRO;
* return Qnil;
*}
*/
/* This is the main entry point to mocklisp execution.
When eval sees a mocklisp function being called, it calls here
with the unevaluated argument list */
Lisp_Object
ml_apply (function, args)
Lisp_Object function, args;
{
/* This function can GC */
int speccount = specpdl_depth ();
Lisp_Object val;
specbind (Qmocklisp_arguments, args);
val = Fprogn (Fcdr (function));
return unbind_to (speccount, val);
}
/* now in lisp code
* DEFUN ("ml-nargs", Fml_nargs, Sml_nargs, 0, 0, 0,
* "Number of arguments to currently executing mocklisp function.")
* ()
* {
* if (EQ (Vmocklisp_arguments, Qinteractive))
* return make_number (0);
* return Flength (Vmocklisp_arguments);
* }
*/
/* now in lisp code
* DEFUN ("ml-arg", Fml_arg, Sml_arg, 1, 2, 0,
* "Argument number N to currently executing mocklisp function.")
* (n, prompt)
* Lisp_Object n, prompt;
* {
* if (EQ (Vmocklisp_arguments, Qinteractive))
* return call1 (Qread_from_minibuffer, prompt);
* CHECK_INT (n, 0);
* XSETINT (n, XINT (n) - 1); /* Mocklisp likes to be origin-1 */
* return Fcar (Fnthcdr (n, Vmocklisp_arguments));
* }
*/
/* now in lisp code
* DEFUN ("ml-interactive", Fml_interactive, Sml_interactive, 0, 0, 0,
* "True if currently executing mocklisp function was called interactively.")
* ()
* {
* return (EQ (Vmocklisp_arguments, Qinteractive)) ? Qt : Qnil;
* }
*/
/* ??? Isn't this the same as `provide-prefix-arg' from mlsupport.el? */
DEFUN ("ml-provide-prefix-argument", Fml_provide_prefix_argument, Sml_provide_prefix_argument,
2, UNEVALLED, 0,
"Evaluate second argument, using first argument as prefix arg value.")
(args)
Lisp_Object args;
{
/* This function can GC */
struct gcpro gcpro1;
GCPRO1 (args);
Vcurrent_prefix_arg = Feval (Fcar (args));
UNGCPRO;
return Feval (Fcar (Fcdr (args)));
}
DEFUN ("ml-prefix-argument-loop", Fml_prefix_argument_loop,
Sml_prefix_argument_loop,
0, UNEVALLED, 0,
"")
(args)
Lisp_Object args;
{
/* This function can GC */
Lisp_Object tem;
int i;
struct gcpro gcpro1;
/* Set `arg' in case we call a built-in function that looks at it. Still are a few. */
if (NILP (Vcurrent_prefix_arg))
i = 1;
else
{
tem = Vcurrent_prefix_arg;
if (CONSP (tem))
tem = Fcar (tem);
if (EQ (tem, Qminus))
i = -1;
else i = XINT (tem);
}
GCPRO1 (args);
while (i-- > 0)
Fprogn (args);
UNGCPRO;
return Qnil;
}
/* now in lisp code
* DEFUN ("ml-substr", Fml_substr, Sml_substr, 3, 3, 0,
* "Return a substring of STRING, starting at index FROM and of length LENGTH.\n\
* If either FROM or LENGTH is negative, the length of STRING is added to it.")
* (string, from, to)
* Lisp_Object string, from, to;
* {
* CHECK_STRING (string, 0);
* CHECK_INT (from, 1);
* CHECK_INT (to, 2);
*
* if (XINT (from) < 0)
* XSETINT (from, XINT (from) + string_length (XSTRING (string)));
* if (XINT (to) < 0)
* XSETINT (to, XINT (to) + string_length (XSTRING (string)));
* XSETINT (to, XINT (to) + XINT (from));
* return Fsubstring (string, from, to);
* }
*/
/* now in lisp code
* DEFUN ("insert-string", Finsert_string, Sinsert_string, 0, MANY, 0,
* "Mocklisp-compatibility insert function.\n\
* Like the function `insert' except that any argument that is a number\n\
* is converted into a string by expressing it in decimal.")
* (nargs, args)
* int nargs;
* Lisp_Object *args;
* {
* int argnum;
* Lisp_Object tem;
*
* for (argnum = 0; argnum < nargs; argnum++)
* {
* tem = args[argnum];
* retry:
* if (INTP (tem))
* tem = Fnumber_to_string (tem);
* if (STRINGP (tem))
* buffer_insert1 (current_buffer, tem);
* else
* {
* tem = wrong_type_argument (Qstringp, tem);
* goto retry;
* }
* }
* return Qnil;
* }
*/
/************************************************************************/
/* initialization */
/************************************************************************/
void
syms_of_mocklisp (void)
{
defsymbol (&Qmocklisp, "mocklisp");
defsymbol (&Qmocklisp_arguments, "mocklisp-arguments");
/*defsubr (&Sml_defun);*/
defsubr (&Sml_if);
/*defsubr (&Sml_while);*/
/*defsubr (&Sml_nargs);*/
/*defsubr (&Sml_arg);*/
/*defsubr (&Sml_interactive);*/
defsubr (&Sml_provide_prefix_argument);
defsubr (&Sml_prefix_argument_loop);
/*defsubr (&Sml_substr);*/
/*defsubr (&Sinsert_string);*/
}
void
vars_of_mocklisp (void)
{
DEFVAR_LISP ("mocklisp-arguments", &Vmocklisp_arguments,
"While in a mocklisp function, the list of its unevaluated args.");
Vmocklisp_arguments = Qt;
}
#endif /* MOCKLISP_SUPPORT */
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