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1.1 root 1: /* Mocklisp compatibility functions for GNU Emacs Lisp interpreter.
2: Copyright (C) 1985, 1986 Free Software Foundation, Inc.
3:
4: This file is part of GNU Emacs.
5:
6: GNU Emacs is free software; you can redistribute it and/or modify
7: it under the terms of the GNU General Public License as published by
8: the Free Software Foundation; either version 1, or (at your option)
9: any later version.
10:
11: GNU Emacs is distributed in the hope that it will be useful,
12: but WITHOUT ANY WARRANTY; without even the implied warranty of
13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: GNU General Public License for more details.
15:
16: You should have received a copy of the GNU General Public License
17: along with GNU Emacs; see the file COPYING. If not, write to
18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19:
20:
21: /* Compatibility for mocklisp */
22:
23: #include "config.h"
24: #include "lisp.h"
25: #include "buffer.h"
26:
27: /* Now in lisp code ("macrocode...")
28: * DEFUN ("ml-defun", Fml_defun, Sml_defun, 0, UNEVALLED, 0,
29: * "Define mocklisp functions")
30: * (args)
31: * Lisp_Object args;
32: * {
33: * Lisp_Object elt;
34: *
35: * while (!NULL (args))
36: * {
37: * elt = Fcar (args);
38: * Ffset (Fcar (elt), Fcons (Qmocklisp, Fcdr (elt)));
39: * args = Fcdr (args);
40: * }
41: * return Qnil;
42: * }
43: */
44:
45: DEFUN ("ml-if", Fml_if, Sml_if, 0, UNEVALLED, 0, "if for mocklisp programs")
46: (args)
47: Lisp_Object args;
48: {
49: register Lisp_Object val;
50: struct gcpro gcpro1;
51:
52: GCPRO1 (args);
53: while (!NULL (args))
54: {
55: val = Feval (Fcar (args));
56: args = Fcdr (args);
57: if (NULL (args)) break;
58: if (XINT (val))
59: {
60: val = Feval (Fcar (args));
61: break;
62: }
63: args = Fcdr (args);
64: }
65: UNGCPRO;
66: return val;
67: }
68:
69: /* Now converted to regular "while" by hairier conversion code.
70: * DEFUN ("ml-while", Fml_while, Sml_while, 1, UNEVALLED, 0, "while for mocklisp programs")
71: * (args)
72: * Lisp_Object args;
73: * {
74: * Lisp_Object test, body, tem;
75: * struct gcpro gcpro1, gcpro2;
76: *
77: * GCPRO2 (test, body);
78: *
79: * test = Fcar (args);
80: * body = Fcdr (args);
81: * while (tem = Feval (test), XINT (tem))
82: * {
83: * QUIT;
84: * Fprogn (body);
85: * }
86: *
87: * UNGCPRO;
88: * return Qnil;
89: *}
90:
91: /* This is the main entry point to mocklisp execution.
92: When eval sees a mocklisp function being called, it calls here
93: with the unevaluated argument list */
94:
95: Lisp_Object
96: ml_apply (function, args)
97: Lisp_Object function, args;
98: {
99: register int count = specpdl_ptr - specpdl;
100: register Lisp_Object val;
101:
102: specbind (Qmocklisp_arguments, args);
103: val = Fprogn (Fcdr (function));
104: unbind_to (count);
105: return val;
106: }
107:
108: DEFUN ("ml-nargs", Fml_nargs, Sml_nargs, 0, 0, 0, "# arguments to this mocklisp function")
109: ()
110: {
111: if (EQ (Vmocklisp_arguments, Qinteractive))
112: return make_number (0);
113: return Flength (Vmocklisp_arguments);
114: }
115:
116: DEFUN ("ml-arg", Fml_arg, Sml_arg, 1, 2, 0, "Argument #N to this mocklisp function.")
117: (n, prompt)
118: Lisp_Object n, prompt;
119: {
120: if (EQ (Vmocklisp_arguments, Qinteractive))
121: return Fread_string (prompt, Qnil);
122: CHECK_NUMBER (n, 0);
123: XSETINT (n, XINT (n) - 1); /* Mocklisp likes to be origin-1 */
124: return Fcar (Fnthcdr (n, Vmocklisp_arguments));
125: }
126:
127: DEFUN ("ml-interactive", Fml_interactive, Sml_interactive, 0, 0, 0,
128: "True if this mocklisp function was called interactively.")
129: ()
130: {
131: return (EQ (Vmocklisp_arguments, Qinteractive)) ? Qt : Qnil;
132: }
133:
134: DEFUN ("ml-provide-prefix-argument", Fml_provide_prefix_argument, Sml_provide_prefix_argument,
135: 2, UNEVALLED, 0,
136: "Evaluate second argument, using first argument as prefix arg value.")
137: (args)
138: Lisp_Object args;
139: {
140: struct gcpro gcpro1;
141: GCPRO1 (args);
142: Vcurrent_prefix_arg = Feval (Fcar (args));
143: UNGCPRO;
144: return Feval (Fcar (Fcdr (args)));
145: }
146:
147: DEFUN ("ml-prefix-argument-loop", Fml_prefix_argument_loop, Sml_prefix_argument_loop,
148: 0, UNEVALLED, 0,
149: "")
150: (args)
151: Lisp_Object args;
152: {
153: register Lisp_Object tem;
154: register int i;
155: struct gcpro gcpro1;
156:
157: /* Set `arg' in case we call a built-in function that looks at it. Still are a few. */
158: if (NULL (Vcurrent_prefix_arg))
159: i = 1;
160: else
161: {
162: tem = Vcurrent_prefix_arg;
163: if (CONSP (tem))
164: tem = Fcar (tem);
165: if (EQ (tem, Qminus))
166: i = -1;
167: else i = XINT (tem);
168: }
169:
170: GCPRO1 (args);
171: while (i-- > 0)
172: Fprogn (args);
173: UNGCPRO;
174: return Qnil;
175: }
176:
177: #ifdef NOTDEF /* Now in mlsupport.el */
178:
179: DEFUN ("ml-substr", Fml_substr, Sml_substr, 3, 3, 0,
180: "Return a substring of STRING, starting at index FROM and of length LENGTH.\n\
181: If either FROM or LENGTH is negative, the length of STRING is added to it.")
182: (string, from, to)
183: Lisp_Object string, from, to;
184: {
185: CHECK_STRING (string, 0);
186: CHECK_NUMBER (from, 1);
187: CHECK_NUMBER (to, 2);
188:
189: if (XINT (from) < 0)
190: XSETINT (from, XINT (from) + XSTRING (string)->size);
191: if (XINT (to) < 0)
192: XSETINT (to, XINT (to) + XSTRING (string)->size);
193: XSETINT (to, XINT (to) + XINT (from));
194: return Fsubstring (string, from, to);
195: }
196: #endif NOTDEF
197: DEFUN ("insert-string", Finsert_string, Sinsert_string, 0, MANY, 0,
198: "Mocklisp-compatibility insert function.\n\
199: Like the function `insert' except that any argument that is a number\n\
200: is converted into a string by expressing it in decimal.")
201: (nargs, args)
202: int nargs;
203: Lisp_Object *args;
204: {
205: register int argnum;
206: register Lisp_Object tem;
207:
208: for (argnum = 0; argnum < nargs; argnum++)
209: {
210: tem = args[argnum];
211: retry:
212: if (XTYPE (tem) == Lisp_Int)
213: tem = Fint_to_string (tem);
214: if (XTYPE (tem) == Lisp_String)
215: {
216: insert (XSTRING (tem)->data, XSTRING (tem)->size);
217: }
218: else
219: {
220: tem = wrong_type_argument (Qstringp, tem);
221: goto retry;
222: }
223: }
224: return Qnil;
225: }
226:
227:
228: syms_of_mocklisp ()
229: {
230: Qmocklisp = intern ("mocklisp");
231: staticpro (&Qmocklisp);
232:
233: /*defsubr (&Sml_defun);*/
234: defsubr (&Sml_if);
235: /*defsubr (&Sml_while);*/
236: defsubr (&Sml_arg);
237: defsubr (&Sml_nargs);
238: defsubr (&Sml_interactive);
239: defsubr (&Sml_provide_prefix_argument);
240: defsubr (&Sml_prefix_argument_loop);
241: /*defsubr (&Sml_substr);*/
242: defsubr (&Sinsert_string);
243: }
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