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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 */
-