01: /*
02: * Jatha - a Common LISP-compatible LISP library in Java.
03: * Copyright (C) 1997-2005 Micheal Scott Hewett
04: *
05: * This library is free software; you can redistribute it and/or
06: * modify it under the terms of the GNU Lesser General Public
07: * License as published by the Free Software Foundation; either
08: * version 2.1 of the License, or (at your option) any later version.
09: *
10: * This library is distributed in the hope that it will be useful,
11: * but WITHOUT ANY WARRANTY; without even the implied warranty of
12: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13: * Lesser General Public License for more details.
14: *
15: * You should have received a copy of the GNU Lesser General Public
16: * License along with this library; if not, write to the Free Software
17: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18: *
19: *
20: * For further information, please contact Micheal Hewett at
21: * hewett@cs.stanford.edu
22: *
23: */
24:
25: package org.jatha.machine;
26:
27: import org.jatha.Jatha;
28: import org.jatha.dynatype.LispValue;
29:
30: // @date Sun Apr 27 1997
31: /**
32: * opSP_BIND binds a special variable to the topmost
33: * value on the stack. The variable name is the
34: * next value on the C register.
35: * @see SECDMachine
36: * @author Micheal S. Hewett hewett@cs.stanford.edu
37: */
38: class opSP_BIND extends SECDop {
39: public opSP_BIND(Jatha lisp) {
40: super (lisp, "SP_BIND");
41: }
42:
43: public void Execute(SECDMachine machine) {
44: LispValue val = machine.S.pop();
45:
46: machine.C.pop(); // Pop the SP_BIND instruction
47: LispValue sym = machine.C.pop(); // Pop the symbol name
48: machine.special_bind(sym, val);
49: }
50:
51: public LispValue grindef(LispValue code, int indentAmount) {
52: indent(indentAmount);
53: System.out.print(functionName);
54: indent(1);
55: code.second().internal_princ(System.out);
56:
57: f_lisp.NEWLINE.internal_princ(System.out);
58:
59: return code.cdr().cdr();
60: }
61: }
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