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1.1 root 1: /* Mocklisp compatibility functions for GNU Emacs Lisp interpreter.
2: Copyright (C) 1985 Richard M. Stallman.
3:
4: This file is part of GNU Emacs.
5:
6: GNU Emacs is distributed in the hope that it will be useful,
7: but WITHOUT ANY WARRANTY. No author or distributor
8: accepts responsibility to anyone for the consequences of using it
9: or for whether it serves any particular purpose or works at all,
10: unless he says so in writing. Refer to the GNU Emacs General Public
11: License for full details.
12:
13: Everyone is granted permission to copy, modify and redistribute
14: GNU Emacs, but only under the conditions described in the
15: GNU Emacs General Public License. A copy of this license is
16: supposed to have been given to you along with GNU Emacs so you
17: can know your rights and responsibilities. It should be in a
18: file named COPYING. Among other things, the copyright notice
19: and this notice must be preserved on all copies. */
20:
21:
22: /* Compatibility for mocklisp */
23:
24: #include "config.h"
25: #include "lisp.h"
26: #include "buffer.h"
27:
28: /* Now in lisp code ("macrocode...")
29: * DEFUN ("ml-defun", Fml_defun, Sml_defun, 0, UNEVALLED, 0,
30: * "Define mocklisp functions")
31: * (args)
32: * Lisp_Object args;
33: * {
34: * Lisp_Object elt;
35: *
36: * while (!NULL (args))
37: * {
38: * elt = Fcar (args);
39: * Ffset (Fcar (elt), Fcons (Qmocklisp, Fcdr (elt)));
40: * args = Fcdr (args);
41: * }
42: * return Qnil;
43: * }
44: */
45:
46: DEFUN ("ml-if", Fml_if, Sml_if, 0, UNEVALLED, 0, "if for mocklisp programs")
47: (args)
48: Lisp_Object args;
49: {
50: register Lisp_Object val;
51: struct gcpro gcpro1;
52:
53: GCPRO1 (args);
54: while (!NULL (args))
55: {
56: val = Feval (Fcar (args));
57: args = Fcdr (args);
58: if (NULL (args)) break;
59: if (XINT (val))
60: {
61: val = Feval (Fcar (args));
62: break;
63: }
64: args = Fcdr (args);
65: }
66: UNGCPRO;
67: return val;
68: }
69:
70: /* Now converted to regular "while" by hairier conversion code.
71: * DEFUN ("ml-while", Fml_while, Sml_while, 1, UNEVALLED, 0, "while for mocklisp programs")
72: * (args)
73: * Lisp_Object args;
74: * {
75: * Lisp_Object test, body, tem;
76: * struct gcpro gcpro1, gcpro2;
77: *
78: * GCPRO2 (test, body);
79: *
80: * test = Fcar (args);
81: * body = Fcdr (args);
82: * while (tem = Feval (test), XINT (tem))
83: * {
84: * QUIT;
85: * Fprogn (body);
86: * }
87: *
88: * UNGCPRO;
89: * return Qnil;
90: *}
91:
92: /* This is the main entry point to mocklisp execution.
93: When eval sees a mocklisp function being called, it calls here
94: with the unevaluated argument list */
95:
96: Lisp_Object
97: ml_apply (function, args)
98: Lisp_Object function, args;
99: {
100: register int count = specpdl_ptr - specpdl;
101: register Lisp_Object val;
102:
103: specbind (Qmocklisp_arguments, args);
104: val = Fprogn (Fcdr (function));
105: unbind_to (count);
106: return val;
107: }
108:
109: DEFUN ("ml-nargs", Fml_nargs, Sml_nargs, 0, 0, 0, "# arguments to this mocklisp function")
110: ()
111: {
112: if (EQ (Vmocklisp_arguments, Qinteractive))
113: return make_number (0);
114: return Flength (Vmocklisp_arguments);
115: }
116:
117: DEFUN ("ml-arg", Fml_arg, Sml_arg, 1, 2, 0, "Argument #N to this mocklisp function.")
118: (n, prompt)
119: Lisp_Object n, prompt;
120: {
121: if (EQ (Vmocklisp_arguments, Qinteractive))
122: return Fread_string (prompt, Qnil);
123: CHECK_NUMBER (n, 0);
124: XSETINT (n, XINT (n) - 1); /* Mocklisp likes to be origin-1 */
125: return Fcar (Fnthcdr (n, Vmocklisp_arguments));
126: }
127:
128: DEFUN ("ml-interactive", Fml_interactive, Sml_interactive, 0, 0, 0,
129: "True if this mocklisp function was called interactively.")
130: ()
131: {
132: return (EQ (Vmocklisp_arguments, Qinteractive)) ? Qt : Qnil;
133: }
134:
135: DEFUN ("ml-provide-prefix-argument", Fml_provide_prefix_argument, Sml_provide_prefix_argument,
136: 2, UNEVALLED, 0,
137: "Evaluate second argument, using first argument as prefix arg value.")
138: (args)
139: Lisp_Object args;
140: {
141: struct gcpro gcpro1;
142: GCPRO1 (args);
143: Vcurrent_prefix_arg = Feval (Fcar (args));
144: UNGCPRO;
145: return Feval (Fcar (Fcdr (args)));
146: }
147:
148: DEFUN ("ml-prefix-argument-loop", Fml_prefix_argument_loop, Sml_prefix_argument_loop,
149: 0, UNEVALLED, 0,
150: "")
151: (args)
152: Lisp_Object args;
153: {
154: register Lisp_Object tem;
155: register int i;
156: struct gcpro gcpro1;
157:
158: /* Set `arg' in case we call a built-in function that looks at it. Still are a few. */
159: if (NULL (Vcurrent_prefix_arg))
160: i = 1;
161: else
162: {
163: tem = Vcurrent_prefix_arg;
164: if (LISTP (tem))
165: tem = Fcar (tem);
166: if (EQ (tem, Qminus))
167: i = -1;
168: else i = XINT (tem);
169: }
170:
171: GCPRO1 (args);
172: while (i-- > 0)
173: Fprogn (args);
174: UNGCPRO;
175: return Qnil;
176: }
177:
178: DEFUN ("ml-substr", Fml_substr, Sml_substr, 3, 3, 0,
179: "Return a substring of STRING, starting at index FROM and of length LENGTH.\n\
180: If either FROM or LENGTH is negative, the length of STRING is added to it.")
181: (string, from, to)
182: Lisp_Object string, from, to;
183: {
184: CHECK_STRING (string, 0);
185: CHECK_NUMBER (from, 1);
186: CHECK_NUMBER (to, 2);
187:
188: if (XINT (from) < 0)
189: XSETINT (from, XINT (from) + XSTRING (string)->size);
190: if (XINT (to) < 0)
191: XSETINT (to, XINT (to) + XSTRING (string)->size);
192: XSETINT (to, XINT (to) + XINT (from));
193: return Fsubstring (string, from, to);
194: }
195:
196: DEFUN ("insert-string", Finsert_string, Sinsert_string, 0, MANY, 0,
197: "Insert the arguments (all strings) into the buffer, moving point forward.\n\
198: Any argument that is a number is converted to a string by printing it in decimal.")
199: (nargs, args)
200: int nargs;
201: Lisp_Object *args;
202: {
203: register int argnum;
204: register Lisp_Object tem;
205:
206: for (argnum = 0; argnum < nargs; argnum++)
207: {
208: tem = args[argnum];
209: retry:
210: if (XTYPE (tem) == Lisp_Int)
211: tem = Fint_to_string (tem);
212: if (XTYPE (tem) == Lisp_String)
213: {
214: InsCStr (XSTRING (tem)->data, XSTRING (tem)->size);
215: }
216: else
217: {
218: tem = wrong_type_argument (Qstringp, tem);
219: goto retry;
220: }
221: }
222: return Qnil;
223: }
224:
225:
226: syms_of_mocklisp ()
227: {
228: Qmocklisp = intern ("mocklisp");
229: staticpro (&Qmocklisp);
230:
231: /*defsubr (&Sml_defun);*/
232: defsubr (&Sml_if);
233: /*defsubr (&Sml_while);*/
234: defsubr (&Sml_arg);
235: defsubr (&Sml_nargs);
236: defsubr (&Sml_interactive);
237: defsubr (&Sml_provide_prefix_argument);
238: defsubr (&Sml_prefix_argument_loop);
239: defsubr (&Sml_substr);
240: defsubr (&Sinsert_string);
241: }
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