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org.armedbear.lisp.StructureObject Maven / Gradle / Ivy
/*
* StructureObject.java
*
* Copyright (C) 2003-2006 Peter Graves
* $Id$
*
* This program 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
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce an
* executable, regardless of the license terms of these independent
* modules, and to copy and distribute the resulting executable under
* terms of your choice, provided that you also meet, for each linked
* independent module, the terms and conditions of the license of that
* module. An independent module is a module which is not derived from
* or based on this library. If you modify this library, you may extend
* this exception to your version of the library, but you are not
* obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
package org.armedbear.lisp;
import static org.armedbear.lisp.Lisp.*;
public class StructureObject extends LispObject
{
private final StructureClass structureClass;
final LispObject[] slots;
public StructureObject(Symbol symbol)
{
structureClass = (StructureClass) LispClass.findClass(symbol/*, true*/); // Might return null.
if (structureClass == null) {
System.err.println("No mitens sitten: " + BuiltInClass.SYSTEM_STREAM.toString());
System.err.println("joopa joo:" + Symbol.SYSTEM_STREAM.name);
System.err.println("Oh noes, structure object got a null class:" + symbol.toString() + ", symbol name:" + symbol.name );
}
slots = new LispObject[0];
}
public StructureObject(Symbol symbol, LispObject[] slots)
{
structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null.
this.slots = slots;
}
public StructureObject(Symbol symbol, LispObject obj0)
{
structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null.
LispObject[] slots = new LispObject[1];
slots[0] = obj0;
this.slots = slots;
}
public StructureObject(Symbol symbol, LispObject obj0, LispObject obj1)
{
structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null.
LispObject[] slots = new LispObject[2];
slots[0] = obj0;
slots[1] = obj1;
this.slots = slots;
}
public StructureObject(Symbol symbol, LispObject obj0, LispObject obj1,
LispObject obj2)
{
structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null.
LispObject[] slots = new LispObject[3];
slots[0] = obj0;
slots[1] = obj1;
slots[2] = obj2;
this.slots = slots;
}
public StructureObject(Symbol symbol, LispObject obj0, LispObject obj1,
LispObject obj2, LispObject obj3)
{
structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null.
LispObject[] slots = new LispObject[4];
slots[0] = obj0;
slots[1] = obj1;
slots[2] = obj2;
slots[3] = obj3;
this.slots = slots;
}
public StructureObject(Symbol symbol, LispObject obj0, LispObject obj1,
LispObject obj2, LispObject obj3, LispObject obj4)
{
structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null.
LispObject[] slots = new LispObject[5];
slots[0] = obj0;
slots[1] = obj1;
slots[2] = obj2;
slots[3] = obj3;
slots[4] = obj4;
this.slots = slots;
}
public StructureObject(Symbol symbol, LispObject obj0, LispObject obj1,
LispObject obj2, LispObject obj3, LispObject obj4,
LispObject obj5)
{
structureClass = (StructureClass) LispClass.findClass(symbol); // Might return null.
LispObject[] slots = new LispObject[6];
slots[0] = obj0;
slots[1] = obj1;
slots[2] = obj2;
slots[3] = obj3;
slots[4] = obj4;
slots[5] = obj5;
this.slots = slots;
}
public StructureObject(StructureObject obj)
{
this.structureClass = obj.structureClass;
slots = new LispObject[obj.slots.length];
for (int i = slots.length; i-- > 0;)
slots[i] = obj.slots[i];
}
@Override
public LispObject typeOf()
{
return structureClass.getName();
}
@Override
public LispObject classOf()
{
return structureClass;
}
protected int getSlotIndex(LispObject slotName) {
LispObject effectiveSlots = structureClass.getSlotDefinitions();
LispObject[] effectiveSlotsArray = effectiveSlots.copyToArray();
for (int i = 0; i < slots.length; i++) {
SimpleVector slotDefinition = (SimpleVector) effectiveSlotsArray[i];
LispObject candidateSlotName = slotDefinition.AREF(1);
if(slotName == candidateSlotName) {
return i;
}
}
return -1;
}
@Override
public LispObject SLOT_VALUE(LispObject slotName)
{
LispObject value;
final int index = getSlotIndex(slotName);
if (index >= 0) {
value = slots[index];
} else {
value = UNBOUND_VALUE;
value = Symbol.SLOT_UNBOUND.execute(structureClass, this, slotName);
LispThread.currentThread()._values = null;
}
return value;
}
public void setSlotValue(LispObject slotName, LispObject newValue) {
final int index = getSlotIndex(slotName);
if (index >= 0) {
slots[index] = newValue;
} else {
LispObject[] args = new LispObject[5];
args[0] = structureClass;
args[1] = this;
args[2] = slotName;
args[3] = Symbol.SETF;
args[4] = newValue;
Symbol.SLOT_MISSING.execute(args);
}
}
@Override
public LispObject getParts()
{
LispObject result = NIL;
result = result.push(new Cons("class", structureClass));
LispObject effectiveSlots = structureClass.getSlotDefinitions();
LispObject[] effectiveSlotsArray = effectiveSlots.copyToArray();
Debug.assertTrue(effectiveSlotsArray.length == slots.length);
for (int i = 0; i < slots.length; i++)
{
SimpleVector slotDefinition = (SimpleVector) effectiveSlotsArray[i];
LispObject slotName = slotDefinition.AREF(1);
result = result.push(new Cons(slotName, slots[i]));
}
return result.nreverse();
}
@Override
public LispObject typep(LispObject type)
{
if (type instanceof StructureClass)
return memq(type, structureClass.getCPL()) ? T : NIL;
if (type == structureClass.getName())
return T;
if (type == Symbol.STRUCTURE_OBJECT)
return T;
if (type == BuiltInClass.STRUCTURE_OBJECT)
return T;
if (type instanceof Symbol)
{
LispClass c = LispClass.findClass((Symbol)type);
if (c != null)
return memq(c, structureClass.getCPL()) ? T : NIL;
}
return super.typep(type);
}
@Override
public boolean equalp(LispObject obj)
{
if (this == obj)
return true;
if (obj instanceof StructureObject)
{
StructureObject o = (StructureObject) obj;
if (structureClass != o.structureClass)
return false;
for (int i = 0; i < slots.length; i++)
{
if (!slots[i].equalp(o.slots[i]))
return false;
}
return true;
}
return false;
}
@Override
public LispObject getSlotValue_0()
{
try
{
return slots[0];
}
catch (ArrayIndexOutOfBoundsException e)
{
return badIndex(0);
}
}
@Override
public LispObject getSlotValue_1()
{
try
{
return slots[1];
}
catch (ArrayIndexOutOfBoundsException e)
{
return badIndex(1);
}
}
@Override
public LispObject getSlotValue_2()
{
try
{
return slots[2];
}
catch (ArrayIndexOutOfBoundsException e)
{
return badIndex(2);
}
}
@Override
public LispObject getSlotValue_3()
{
try
{
return slots[3];
}
catch (ArrayIndexOutOfBoundsException e)
{
return badIndex(3);
}
}
@Override
public LispObject getSlotValue(int index)
{
try
{
return slots[index];
}
catch (ArrayIndexOutOfBoundsException e)
{
return badIndex(index);
}
}
@Override
public int getFixnumSlotValue(int index)
{
try
{
return Fixnum.getValue(slots[index]);
}
catch (ArrayIndexOutOfBoundsException e)
{
badIndex(index);
// Not reached.
return 0;
}
}
@Override
public boolean getSlotValueAsBoolean(int index)
{
try
{
return slots[index] != NIL;
}
catch (ArrayIndexOutOfBoundsException e)
{
badIndex(index);
// Not reached.
return false;
}
}
@Override
public void setSlotValue_0(LispObject value)
{
try
{
slots[0] = value;
}
catch (ArrayIndexOutOfBoundsException e)
{
badIndex(0);
}
}
@Override
public void setSlotValue_1(LispObject value)
{
try
{
slots[1] = value;
}
catch (ArrayIndexOutOfBoundsException e)
{
badIndex(1);
}
}
@Override
public void setSlotValue_2(LispObject value)
{
try
{
slots[2] = value;
}
catch (ArrayIndexOutOfBoundsException e)
{
badIndex(2);
}
}
@Override
public void setSlotValue_3(LispObject value)
{
try
{
slots[3] = value;
}
catch (ArrayIndexOutOfBoundsException e)
{
badIndex(3);
}
}
@Override
public void setSlotValue(int index, LispObject value)
{
try
{
slots[index] = value;
}
catch (ArrayIndexOutOfBoundsException e)
{
badIndex(index);
}
}
private LispObject badIndex(int n)
{
StringBuilder sb = new StringBuilder("Invalid slot index ");
sb.append(Fixnum.getInstance(n).princToString());
sb.append(" for ");
sb.append(princToString());
return error(new LispError(sb.toString()));
}
@Override
public final int psxhash()
{
return psxhash(4);
}
@Override
public final int psxhash(int depth)
{
int result = mix(structureClass.sxhash(), 7814971);
if (depth > 0)
{
int limit = slots.length;
if (limit > 4)
limit = 4;
for (int i = 0; i < limit; i++)
result = mix(slots[i].psxhash(depth - 1), result);
}
return result & 0x7fffffff;
}
@Override
public String printObject()
{
try
{
final LispThread thread = LispThread.currentThread();
// FIXME
if (typep(Symbol.RESTART) != NIL)
{
Symbol PRINT_RESTART = PACKAGE_SYS.intern("PRINT-RESTART");
LispObject fun = PRINT_RESTART.getSymbolFunction();
StringOutputStream stream = new StringOutputStream();
thread.execute(fun, this, stream);
return stream.getString().getStringValue();
}
if (_PRINT_STRUCTURE_.symbolValue(thread) == NIL)
return unreadableString(structureClass.getName().printObject());
int maxLevel = Integer.MAX_VALUE;
LispObject printLevel = Symbol.PRINT_LEVEL.symbolValue(thread);
if (printLevel instanceof Fixnum)
maxLevel = ((Fixnum)printLevel).value;
LispObject currentPrintLevel =
_CURRENT_PRINT_LEVEL_.symbolValue(thread);
int currentLevel = Fixnum.getValue(currentPrintLevel);
if (currentLevel >= maxLevel && slots.length > 0)
return "#";
StringBuilder sb = new StringBuilder("#S(");
sb.append(structureClass.getName().printObject());
if (currentLevel < maxLevel)
{
LispObject effectiveSlots = structureClass.getSlotDefinitions();
LispObject[] effectiveSlotsArray = effectiveSlots.copyToArray();
Debug.assertTrue(effectiveSlotsArray.length == slots.length);
final LispObject printLength = Symbol.PRINT_LENGTH.symbolValue(thread);
final int limit;
if (printLength instanceof Fixnum)
limit = Math.min(slots.length, ((Fixnum)printLength).value);
else
limit = slots.length;
final boolean printCircle =
(Symbol.PRINT_CIRCLE.symbolValue(thread) != NIL);
for (int i = 0; i < limit; i++)
{
sb.append(' ');
SimpleVector slotDefinition = (SimpleVector) effectiveSlotsArray[i];
// FIXME AREF(1)
LispObject slotName = slotDefinition.AREF(1);
Debug.assertTrue(slotName instanceof Symbol);
sb.append(':');
sb.append(((Symbol)slotName).name.getStringValue());
sb.append(' ');
if (printCircle)
{
StringOutputStream stream = new StringOutputStream();
thread.execute(Symbol.OUTPUT_OBJECT.getSymbolFunction(),
slots[i], stream);
sb.append(stream.getString().getStringValue());
}
else
sb.append(slots[i].printObject());
}
if (limit < slots.length)
sb.append(" ...");
}
sb.append(')');
return sb.toString();
}
catch (StackOverflowError e)
{
error(new StorageCondition("Stack overflow."));
return null; // Not reached.
}
}
private static final Primitive STRUCTURE_OBJECT_P
= new pf_structure_object_p();
@DocString(name="structure-object-p",
args="object",
returns="generalized-boolean")
private static final class pf_structure_object_p extends Primitive
{
pf_structure_object_p()
{
super("structure-object-p", PACKAGE_SYS, true, "object");
}
@Override
public LispObject execute(LispObject arg)
{
return arg instanceof StructureObject ? T : NIL;
}
};
private static final Primitive STRUCTURE_LENGTH
= new pf_structure_length();
@DocString(name="structure-length",
args="instance",
returns="length")
private static final class pf_structure_length extends Primitive
{
pf_structure_length()
{
super("structure-length", PACKAGE_SYS, true, "instance");
}
@Override
public LispObject execute(LispObject arg)
{
if (arg instanceof StructureObject)
return Fixnum.getInstance(((StructureObject)arg).slots.length);
return type_error(arg, Symbol.STRUCTURE_OBJECT);
}
};
private static final Primitive STRUCTURE_REF
= new pf_structure_ref();
@DocString(name="structure-ref",
args="instance index",
returns="value")
private static final class pf_structure_ref extends Primitive
{
pf_structure_ref()
{
super("structure-ref", PACKAGE_SYS, true);
}
@Override
public LispObject execute(LispObject first, LispObject second)
{
if (first instanceof StructureObject)
try
{
return ((StructureObject)first).slots[Fixnum.getValue(second)];
}
catch (ArrayIndexOutOfBoundsException e)
{
// Shouldn't happen.
return error(new LispError("Internal error."));
}
return type_error(first, Symbol.STRUCTURE_OBJECT);
}
};
private static final Primitive STRUCTURE_SET
= new pf_structure_set();
@DocString(name="structure-set",
args="instance index new-value",
returns="new-value")
private static final class pf_structure_set extends Primitive
{
pf_structure_set()
{
super("structure-set", PACKAGE_SYS, true);
}
@Override
public LispObject execute(LispObject first, LispObject second,
LispObject third)
{
if (first instanceof StructureObject)
try
{
((StructureObject)first).slots[Fixnum.getValue(second)] = third;
return third;
}
catch (ArrayIndexOutOfBoundsException e)
{
// Shouldn't happen.
return error(new LispError("Internal error."));
}
return type_error(first, Symbol.STRUCTURE_OBJECT);
}
};
private static final Primitive MAKE_STRUCTURE
= new pf_make_structure();
@DocString(name="make-structure")
private static final class pf_make_structure extends Primitive
{
pf_make_structure()
{
super("make-structure", PACKAGE_SYS, true);
}
@Override
public LispObject execute(LispObject first, LispObject second)
{
return new StructureObject(checkSymbol(first), second);
}
@Override
public LispObject execute(LispObject first, LispObject second,
LispObject third)
{
return new StructureObject(checkSymbol(first), second, third);
}
@Override
public LispObject execute(LispObject first, LispObject second,
LispObject third, LispObject fourth)
{
return new StructureObject(checkSymbol(first), second, third, fourth);
}
@Override
public LispObject execute(LispObject first, LispObject second,
LispObject third, LispObject fourth,
LispObject fifth)
{
return new StructureObject(checkSymbol(first), second, third, fourth,
fifth);
}
@Override
public LispObject execute(LispObject first, LispObject second,
LispObject third, LispObject fourth,
LispObject fifth, LispObject sixth)
{
return new StructureObject(checkSymbol(first), second, third, fourth,
fifth, sixth);
}
@Override
public LispObject execute(LispObject first, LispObject second,
LispObject third, LispObject fourth,
LispObject fifth, LispObject sixth,
LispObject seventh)
{
return new StructureObject(checkSymbol(first), second, third, fourth,
fifth, sixth, seventh);
}
};
private static final Primitive _MAKE_STRUCTURE
= new pf__make_structure();
@DocString(name="%make-structure",
args="name slot-values",
returns="object")
private static final class pf__make_structure extends Primitive
{
pf__make_structure()
{
super("%make-structure", PACKAGE_SYS, true);
}
@Override
public LispObject execute(LispObject first, LispObject second)
{
return new StructureObject(checkSymbol(first), second.copyToArray());
}
};
private static final Primitive COPY_STRUCTURE
= new pf_copy_structure();
@DocString(name="copy-structure",
args="structure",
returns="copy")
private static final class pf_copy_structure extends Primitive
{
pf_copy_structure()
{
super(Symbol.COPY_STRUCTURE, "structure");
}
@Override
public LispObject execute(LispObject arg)
{
if (arg instanceof StructureObject)
return new StructureObject((StructureObject)arg);
return type_error(arg, Symbol.STRUCTURE_OBJECT);
}
};
}
