/**
* Copyright (c) 2014, the Railo Company Ltd.
* Copyright (c) 2015, Lucee Assosication Switzerland
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
package lucee.transformer.bytecode.util;
import java.util.HashMap;
import java.util.Map;
import lucee.commons.lang.CFTypes;
import lucee.commons.lang.ExceptionUtil;
import lucee.commons.lang.StringUtil;
import lucee.runtime.op.Caster;
import lucee.transformer.Position;
import lucee.transformer.TransformerException;
import lucee.transformer.bytecode.BodyBase;
import lucee.transformer.bytecode.BytecodeContext;
import lucee.transformer.bytecode.Statement;
import lucee.transformer.bytecode.visitor.OnFinally;
import lucee.transformer.bytecode.visitor.TryFinallyVisitor;
import lucee.transformer.expression.ExprString;
import lucee.transformer.expression.Expression;
import lucee.transformer.expression.literal.LitString;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.GeneratorAdapter;
import org.objectweb.asm.commons.Method;
public final class ExpressionUtil {
public static final Method START = new Method(
"exeLogStart",
Types.VOID,
new Type[]{Types.INT_VALUE,Types.STRING});
public static final Method END = new Method(
"exeLogEnd",
Types.VOID,
new Type[]{Types.INT_VALUE,Types.STRING});
public static final Method CURRENT_LINE = new Method(
"currentLine",
Types.VOID,
new Type[]{Types.INT_VALUE});
private static Map<String,String> last=new HashMap<String,String>();
public static void writeOutExpressionArray(BytecodeContext bc, Type arrayType, Expression[] array) throws TransformerException {
GeneratorAdapter adapter = bc.getAdapter();
adapter.push(array.length);
adapter.newArray(arrayType);
for (int i = 0; i < array.length; i++) {
adapter.dup();
adapter.push(i);
array[i].writeOut(bc, Expression.MODE_REF);
adapter.visitInsn(Opcodes.AASTORE);
}
}
/**
* visit line number
* @param adapter
* @param line
* @param silent id silent this is ignored for log
*/
public static synchronized void visitLine(BytecodeContext bc, Position pos) {
if(pos!=null){
visitLine(bc, pos.line);
}
}
private static synchronized void visitLine(BytecodeContext bc, int line) {
if(line>0){
/*Type[] methodTypes = bc.getMethod().getArgumentTypes();
if(methodTypes!=null && methodTypes.length>0 && methodTypes[0].equals(Types.PAGE_CONTEXT)) {
GeneratorAdapter adapter = bc.getAdapter();
adapter.loadArg(0);
adapter.checkCast(Types.PAGE_CONTEXT_IMPL);
adapter.push(line);
adapter.invokeVirtual(Types.PAGE_CONTEXT_IMPL,CURRENT_LINE );
}*/
if(!(""+line).equals(last.get(bc.getClassName()+":"+bc.getId()))){
bc.visitLineNumber(line);
last.put(bc.getClassName()+":"+bc.getId(),""+line);
last.put(bc.getClassName(),""+line);
}
}
}
public static synchronized void lastLine(BytecodeContext bc) {
int line = Caster.toIntValue(last.get(bc.getClassName()),-1);
visitLine(bc, line);
}
/**
* write out expression without LNT
* @param value
* @param bc
* @param mode
* @throws TransformerException
*/
public static void writeOutSilent(Expression value, BytecodeContext bc, int mode) throws TransformerException {
Position start = value.getStart();
Position end = value.getEnd();
value.setStart(null);
value.setEnd(null);
value.writeOut(bc, mode);
value.setStart(start);
value.setEnd(end);
}
public static void writeOut(Expression value, BytecodeContext bc, int mode) throws TransformerException {
value.writeOut(bc, mode);
}
public static void writeOut(final Statement s, BytecodeContext bc) throws TransformerException {
if(ExpressionUtil.doLog(bc)) {
final String id=BodyBase.id();
TryFinallyVisitor tfv=new TryFinallyVisitor(new OnFinally() {
@Override
public void _writeOut(BytecodeContext bc) {
ExpressionUtil.callEndLog(bc, s,id);
}
},null);
tfv.visitTryBegin(bc);
ExpressionUtil.callStartLog(bc, s,id);
s.writeOut(bc);
tfv.visitTryEnd(bc) ;
}
else s.writeOut(bc);
}
public static short toShortType(ExprString expr,boolean alsoAlias, short defaultValue) {
if(expr instanceof LitString){
return CFTypes.toShort(((LitString)expr).getString(),alsoAlias,defaultValue);
}
return defaultValue;
}
public static void callStartLog(BytecodeContext bc, Statement s, String id) {
call_Log(bc, START, s.getStart(),id);
}
public static void callEndLog(BytecodeContext bc, Statement s, String id) {
call_Log(bc, END, s.getEnd(),id);
}
private static void call_Log(BytecodeContext bc, Method method, Position pos, String id) {
if(!bc.writeLog() || pos==null || (StringUtil.indexOfIgnoreCase(bc.getMethod().getName(),"call")==-1))return;
try{
GeneratorAdapter adapter = bc.getAdapter();
adapter.loadArg(0);
//adapter.checkCast(Types.PAGE_CONTEXT_IMPL);
adapter.push(pos.pos);
adapter.push(id);
adapter.invokeVirtual(Types.PAGE_CONTEXT, method);
}
catch(Throwable t) {ExceptionUtil.rethrowIfNecessary(t);}
}
public static boolean doLog(BytecodeContext bc) {
return bc.writeLog() && StringUtil.indexOfIgnoreCase(bc.getMethod().getName(),"call")!=-1;
}
}