/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.es.parser;
import com.caucho.es.ESException;
import java.io.IOException;
/**
* Expr is an intermediate form representing an expression.
*/
class PostfixExpr extends Expr {
final static int PREINC = 'i';
final static int PREDEC = 'd';
final static int POSTINC = 'I';
final static int POSTDEC = 'D';
private int code;
private FieldExpr field;
private IdExpr id;
private AssignExpr cheat;
PostfixExpr(Block block, int code, FieldExpr field)
{
super(block);
this.code = code;
this.field = field;
if (field != null)
field.setUsed();
}
PostfixExpr(Block block, int code, IdExpr id)
{
super(block);
this.code = code;
this.id = id;
if (id != null)
id.setUsed();
}
int getType()
{
if (id == null || ! id.isLocal())
return TYPE_NUMBER;
else if (id.getType() == TYPE_INTEGER)
return TYPE_INTEGER;
else if (id.getType() == TYPE_NUMBER)
return TYPE_NUMBER;
else
return TYPE_ES;
}
void exprStatement(Function fun) throws ESException
{
setTop();
fun.addExpr(this);
}
void printInt32Impl() throws IOException
{
switch (code) {
case PREINC:
if (! noValue)
cl.print("(");
cl.print(id.getId());
cl.print(" = ");
id.printInt32();
cl.print(" + 1");
if (! noValue)
cl.print(")");
return;
case PREDEC:
if (! noValue)
cl.print("(");
cl.print(id.getId());
cl.print(" = ");
id.printInt32();
cl.print(" - 1");
if (! noValue)
cl.print(")");
return;
case POSTINC:
if (! noValue) {
cl.print("_env._first(");
id.printInt32();
cl.print(", ");
}
cl.print(id.getId());
cl.print(" = ");
id.printInt32();
cl.print(" + 1");
if (! noValue)
cl.print(")");
return;
case POSTDEC:
if (! noValue) {
cl.print("_env._first(");
id.printInt32();
cl.print(", ");
}
cl.print(id.getId());
cl.print(" = ");
id.printInt32();
cl.print(" - 1");
if (! noValue)
cl.print(")");
return;
}
}
void printNumImpl() throws IOException
{
if (id != null && id.isLocal()) {
switch (code) {
case PREINC:
if (! noValue)
cl.print("(");
cl.print(id.getId());
cl.print(" = ");
id.printNum();
cl.print(" + 1");
if (! noValue)
cl.print(")");
return;
case PREDEC:
if (! noValue)
cl.print("(");
cl.print(id.getId());
cl.print(" = ");
id.printNum();
cl.print(" - 1");
if (! noValue)
cl.print(")");
return;
case POSTINC:
if (! noValue) {
cl.print("_env._first(");
id.printNum();
cl.print(", ");
}
cl.print(id.getId());
cl.print(" = ");
id.printNum();
cl.print(" + 1");
if (! noValue)
cl.print(")");
return;
case POSTDEC:
if (! noValue) {
cl.print("_env._first(");
id.printNum();
cl.print(", ");
}
cl.print(id.getId());
cl.print(" = ");
id.printNum();
cl.print(" - 1");
if (! noValue)
cl.print(")");
return;
}
}
switch (code) {
case PREINC:
case PREDEC:
cl.print("_env._pre(");
break;
case POSTINC:
case POSTDEC:
cl.print("_env._post(");
break;
}
if (field != null) {
field.getExpr().print();
cl.print(", ");
field.getField().printStr();
} else if (function.isGlobalScope()) {
cl.print("_env.global, ");
printLiteral(id.getId());
} else {
printLiteral(id.getId());
}
if (code == PREINC || code == POSTINC)
cl.print(", 1)");
else
cl.print(", -1)");
}
void printImpl() throws IOException
{
switch (code) {
case PREINC:
if (! noValue)
cl.print("(");
cl.print(id.getId());
cl.print(" = ESNumber.create(");
id.printNum();
cl.print(" + 1)");
if (! noValue)
cl.print(")");
return;
case PREDEC:
if (! noValue)
cl.print(")");
cl.print(id.getId());
cl.print(" = ESNumber.create(");
id.printNum();
cl.print(" - 1)");
if (! noValue)
cl.print(")");
return;
case POSTINC:
if (! noValue) {
cl.print("_env._first(");
id.print();
cl.print(", ");
}
cl.print(id.getId());
cl.print(" = ESNumber.create(");
id.printNum();
cl.print(" + 1)");
if (! noValue)
cl.print(")");
return;
case POSTDEC:
if (! noValue) {
cl.print("_env._first(");
id.print();
cl.print(", ");
}
cl.print(id.getId());
cl.print(" = ESNumber.create(");
id.printNum();
cl.print(" - 1)");
if (! noValue)
cl.print(")");
return;
}
return;
}
}