001/** 002 * 003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved. 004 * 005 * This library is free software; you can redistribute it and/or 006 * modify it under the terms of the GNU Lesser General Public 007 * License as published by the Free Software Foundation; either 008 * version 2.1 of the License, or (at your option) any later version. 009 * 010 * This library is distributed in the hope that it will be useful, 011 * but WITHOUT ANY WARRANTY; without even the implied warranty of 012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 013 * Lesser General Public License for more details. 014 * 015 * You should have received a copy of the GNU Lesser General Public 016 * License along with this library. If not, see <http://www.gnu.org/licenses/>. 017 * 018 **/ 019package lucee.transformer.bytecode.statement.tag; 020 021import lucee.transformer.bytecode.BytecodeContext; 022import lucee.transformer.bytecode.BytecodeException; 023import lucee.transformer.bytecode.Position; 024import lucee.transformer.bytecode.statement.FlowControlFinal; 025import lucee.transformer.bytecode.statement.FlowControlFinalImpl; 026import lucee.transformer.bytecode.util.Types; 027import lucee.transformer.bytecode.visitor.NotVisitor; 028import lucee.transformer.bytecode.visitor.OnFinally; 029import lucee.transformer.bytecode.visitor.TryFinallyVisitor; 030 031import org.objectweb.asm.Label; 032import org.objectweb.asm.Opcodes; 033import org.objectweb.asm.Type; 034import org.objectweb.asm.commons.GeneratorAdapter; 035import org.objectweb.asm.commons.Method; 036 037public final class TagSilent extends TagBase { 038 039 // boolean setSilent() 040 private static final Method SET_SILENT = new Method( 041 "setSilent", 042 Types.BOOLEAN_VALUE, 043 new Type[]{} 044 ); 045 046 // boolean unsetSilent(); 047 private static final Method UNSET_SILENT = new Method( 048 "unsetSilent", 049 Types.BOOLEAN_VALUE, 050 new Type[]{} 051 ); 052 053 private FlowControlFinalImpl fcf; 054 055 public TagSilent(Position start,Position end) { 056 super(start,end); 057 } 058 059 /** 060 * 061 * @see lucee.transformer.bytecode.statement.tag.TagBase#_writeOut(org.objectweb.asm.commons.GeneratorAdapter) 062 */ 063 public void _writeOut(BytecodeContext bc) throws BytecodeException { 064 final GeneratorAdapter adapter = bc.getAdapter(); 065 066 final int silentMode=adapter.newLocal(Types.BOOLEAN_VALUE); 067 068 // boolean silentMode= pc.setSilent(); 069 adapter.loadArg(0); 070 adapter.invokeVirtual(Types.PAGE_CONTEXT, SET_SILENT); 071 adapter.storeLocal(silentMode); 072 073 // call must be 074 TryFinallyVisitor tfv=new TryFinallyVisitor(new OnFinally() { 075 public void _writeOut(BytecodeContext bc) { 076 //if(fcf!=null && fcf.getAfterFinalGOTOLabel()!=null)ASMUtil.visitLabel(adapter,fcf.getFinalEntryLabel()); 077 // if(!silentMode)pc.unsetSilent(); 078 Label _if=new Label(); 079 adapter.loadLocal(silentMode); 080 NotVisitor.visitNot(bc); 081 adapter.ifZCmp(Opcodes.IFEQ, _if); 082 adapter.loadArg(0); 083 adapter.invokeVirtual(Types.PAGE_CONTEXT, UNSET_SILENT); 084 adapter.pop(); 085 086 adapter.visitLabel(_if); 087 /*if(fcf!=null) { 088 Label l = fcf.getAfterFinalGOTOLabel(); 089 if(l!=null)adapter.visitJumpInsn(Opcodes.GOTO, l); 090 }*/ 091 } 092 },getFlowControlFinal()); 093 tfv.visitTryBegin(bc); 094 getBody().writeOut(bc); 095 tfv.visitTryEnd(bc); 096 097 } 098 099 @Override 100 public FlowControlFinal getFlowControlFinal() { 101 if(fcf==null)fcf = new FlowControlFinalImpl(); 102 return fcf; 103 } 104 105}