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authorRichard M. Stallman <rms@gnu.org>1990-12-31 04:18:02 +0000
committerRichard M. Stallman <rms@gnu.org>1990-12-31 04:18:02 +0000
commit4a7b14034838ab8a0d0cb9a37d2cf43b2bf3528f (patch)
tree75521a7f76aee7688b0ce6467ebca05019c0bece /src/mocklisp.c
parent3ee2f56939fe79dffba4f0afc288e5636d453544 (diff)
downloademacs-4a7b14034838ab8a0d0cb9a37d2cf43b2bf3528f.tar.gz
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+/* 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, "Mocklisp version of `if'.")
+ (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));
+ return unbind_to (count, val);
+}
+
+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);
+}
+
+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 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 currently executing 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;
+}
+
+#if 0 /* 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)
+ insert1 (tem);
+ 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);
+}