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mocklisp.c
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1991-01-08
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6KB
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244 lines
/* Mocklisp compatibility functions for GNU Emacs Lisp interpreter.
Copyright (C) 1985, 1986 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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 1, or (at your option)
any later version.
GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Compatibility for mocklisp */
#include "config.h"
#include "lisp.h"
#include "buffer.h"
/* 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 (!NULL (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, "if for mocklisp programs")
(args)
Lisp_Object args;
{
register Lisp_Object val;
struct gcpro gcpro1;
GCPRO1 (args);
while (!NULL (args))
{
val = Feval (Fcar (args));
args = Fcdr (args);
if (NULL (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;
{
register int count = specpdl_ptr - specpdl;
register Lisp_Object val;
specbind (Qmocklisp_arguments, args);
val = Fprogn (Fcdr (function));
unbind_to (count);
return val;
}
DEFUN ("ml-nargs", Fml_nargs, Sml_nargs, 0, 0, 0, "# arguments to this mocklisp function")
()
{
if (EQ (Vmocklisp_arguments, Qinteractive))
return make_number (0);
return Flength (Vmocklisp_arguments);
}
DEFUN ("ml-arg", Fml_arg, Sml_arg, 1, 2, 0, "Argument #N to this mocklisp function.")
(n, prompt)
Lisp_Object n, prompt;
{
if (EQ (Vmocklisp_arguments, Qinteractive))
return Fread_string (prompt, Qnil);
CHECK_NUMBER (n, 0);
XSETINT (n, XINT (n) - 1); /* Mocklisp likes to be origin-1 */
return Fcar (Fnthcdr (n, Vmocklisp_arguments));
}
DEFUN ("ml-interactive", Fml_interactive, Sml_interactive, 0, 0, 0,
"True if this mocklisp function was called interactively.")
()
{
return (EQ (Vmocklisp_arguments, Qinteractive)) ? Qt : Qnil;
}
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;
{
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;
{
register Lisp_Object tem;
register int i;
struct gcpro gcpro1;
/* Set `arg' in case we call a built-in function that looks at it. Still are a few. */
if (NULL (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;
}
#ifdef NOTDEF /* Now in mlsupport.el */
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_NUMBER (from, 1);
CHECK_NUMBER (to, 2);
if (XINT (from) < 0)
XSETINT (from, XINT (from) + XSTRING (string)->size);
if (XINT (to) < 0)
XSETINT (to, XINT (to) + XSTRING (string)->size);
XSETINT (to, XINT (to) + XINT (from));
return Fsubstring (string, from, to);
}
#endif NOTDEF
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;
{
register int argnum;
register Lisp_Object tem;
for (argnum = 0; argnum < nargs; argnum++)
{
tem = args[argnum];
retry:
if (XTYPE (tem) == Lisp_Int)
tem = Fint_to_string (tem);
if (XTYPE (tem) == Lisp_String)
{
insert (XSTRING (tem)->data, XSTRING (tem)->size);
}
else
{
tem = wrong_type_argument (Qstringp, tem);
goto retry;
}
}
return Qnil;
}
syms_of_mocklisp ()
{
Qmocklisp = intern ("mocklisp");
staticpro (&Qmocklisp);
/*defsubr (&Sml_defun);*/
defsubr (&Sml_if);
/*defsubr (&Sml_while);*/
defsubr (&Sml_arg);
defsubr (&Sml_nargs);
defsubr (&Sml_interactive);
defsubr (&Sml_provide_prefix_argument);
defsubr (&Sml_prefix_argument_loop);
/*defsubr (&Sml_substr);*/
defsubr (&Sinsert_string);
}