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simplified String simplifying.

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NewConstructor simplified.


git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@88 379699f6-c40d-0410-875b-85095c16579e
stable
jochen 26 years ago
parent a98db05be7
commit 621ceac745
1 changed files with 72 additions and 67 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 139
      jode/jode/expr/ComplexExpression.java

139
jode/jode/expr/ComplexExpression.java
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@ -72,7 +72,7 @@ public class ComplexExpression extends Expression {
/**
* Checks if the given Expression (which should be a StoreInstruction)
* can be combined into this expression.
* @param e The store expression.
* @param e The store expression, must be of type void.
* @return 1, if it can, 0, if no match was found and -1, if a
* conflict was found. You may wish to check for >0.
*/
@ -108,13 +108,9 @@ public class ComplexExpression extends Expression {
StoreInstruction store = (StoreInstruction) e.getOperator();
if (store.matches(operator)) {
operator.parent = null;
operator = new AssignOperator(store.getOperatorIndex(), store);
operator.parent = this;
this.subExpressions = ((ComplexExpression) e).subExpressions;
for (int i=0; i < subExpressions.length; i++)
subExpressions[i].parent = this;
return this;
store.makeNonVoid();
e.type = store.getType();
return e;
}
for (int i=0; i < subExpressions.length; i++) {
Expression combined = subExpressions[i].combine(e);
@ -242,16 +238,15 @@ public class ComplexExpression extends Expression {
static Expression emptyString =
new EmptyStringOperator();
Expression simplifyStringBuffer() {
public Expression simplifyStringBuffer() {
gnu.bytecode.CpoolRef field;
if (operator instanceof InvokeOperator
&& ((field = ((InvokeOperator)operator).getField())
.getCpoolClass().getName().getString()
.replace(java.io.File.separatorChar, '.')
.equals("java.lang.StringBuffer"))
&& !((InvokeOperator)operator).isStatic() &&
field.getNameAndType().getName().getString().equals("append") &&
((InvokeOperator)operator).getMethodType().getArgumentTypes().length == 1) {
&& (((InvokeOperator)operator).getClassType()
.equals(Type.tStringBuffer))
&& !((InvokeOperator)operator).isStatic()
&& (((InvokeOperator)operator).getMethodName().equals("append"))
&& (((InvokeOperator)operator).getMethodType()
.getArgumentTypes().length == 1)) {
Expression e = subExpressions[0].simplifyStringBuffer();
if (e == null)
@ -263,16 +258,59 @@ public class ComplexExpression extends Expression {
return new ComplexExpression
(new StringAddOperator(), new Expression[]
{ e, subExpressions[1].simplify() });
{ e, subExpressions[1] });
}
if (operator instanceof ConstructorOperator &&
operator.getType().isOfType(Type.tStringBuffer)) {
/* subExpressions[0] is always a "new StringBuffer" */
if (subExpressions.length == 1)
if (subExpressions.length == 0)
return emptyString;
else if (subExpressions.length == 2 &&
subExpressions[1].getType().isOfType(Type.tString))
return subExpressions[1].simplify();
else if (subExpressions.length == 1 &&
subExpressions[0].getType().isOfType(Type.tString))
return subExpressions[0];
}
return null;
}
public Expression simplifyString() {
if (operator instanceof InvokeOperator) {
InvokeOperator invoke = (InvokeOperator) operator;
if (invoke.getMethodName().equals("toString")
&& !invoke.isStatic()
&& (invoke.getClassType().equals(Type.tStringBuffer))
&& subExpressions.length == 1) {
Expression simple = subExpressions[0].simplifyStringBuffer();
if (simple != null)
return simple;
}
else if (invoke.getMethodName().equals("valueOf")
&& invoke.isStatic()
&& invoke.getClassType().equals(Type.tString)
&& subExpressions.length == 1) {
if (subExpressions[0].getType().isOfType(Type.tString))
return subExpressions[0];
return new ComplexExpression
(new StringAddOperator(), new Expression[]
{ emptyString, subExpressions[0] });
}
/* The pizza way (pizza is the compiler of kaffe) */
else if (invoke.getMethodName().equals("concat")
&& !invoke.isStatic()
&& invoke.getClassType().equals(Type.tString)) {
Expression left = subExpressions[0].simplify();
Expression right = subExpressions[1].simplify();
if (right instanceof ComplexExpression
&& right.getOperator() instanceof StringAddOperator
&& (((ComplexExpression) right).subExpressions[0]
== emptyString))
right = ((ComplexExpression)right).subExpressions[1];
return new ComplexExpression
(new StringAddOperator(), new Expression[]
{ left, right });
}
}
return null;
}
@ -294,17 +332,11 @@ public class ComplexExpression extends Expression {
return subExpressions[0].negate().simplify();
}
}
else if ((operator instanceof AssignOperator ||
operator instanceof StoreInstruction) &&
else if (operator instanceof StoreInstruction &&
subExpressions[subExpressions.length-1]
.getOperator() instanceof ConstOperator) {
StoreInstruction store;
if (operator instanceof AssignOperator)
store = ((AssignOperator)operator).getStore();
else
store = (StoreInstruction)operator;
StoreInstruction store = (StoreInstruction) operator;
ConstOperator one = (ConstOperator)
subExpressions[subExpressions.length-1].getOperator();
@ -312,17 +344,14 @@ public class ComplexExpression extends Expression {
operator.OPASSIGN_OP+operator.ADD_OP ||
operator.getOperatorIndex() ==
operator.OPASSIGN_OP+operator.NEG_OP) &&
(one.getValue().equals("1") ||
one.getValue().equals("-1"))) {
(one.getValue().equals("1"))) {
int op = ((operator.getOperatorIndex() ==
operator.OPASSIGN_OP+operator.ADD_OP) ==
one.getValue().equals("1"))?
operator.INC_OP : operator.DEC_OP;
int op = (operator.getOperatorIndex() ==
operator.OPASSIGN_OP+operator.ADD_OP)
? operator.INC_OP : operator.DEC_OP;
Operator ppfixop = new PrePostFixOperator
(store.getLValueType(), op, store,
operator instanceof StoreInstruction);
(store.getLValueType(), op, store, store.isVoid());
if (subExpressions.length == 1)
return ppfixop.simplify();
@ -353,35 +382,11 @@ public class ComplexExpression extends Expression {
/* xx != false */
if (operator.getOperatorIndex() == operator.NOTEQUALS_OP)
return subExpressions[0].simplify();
}
else if (operator instanceof InvokeOperator
&& (((InvokeOperator)operator).getField()
.getNameAndType().getName().getString().equals("toString"))
&& !((InvokeOperator)operator).isStatic()
&& (((InvokeOperator)operator).getField()
.getCpoolClass().getName().getString()
.replace(java.io.File.separatorChar, '.')
.equals("java.lang.StringBuffer"))
&& subExpressions.length == 1) {
Expression simple = subExpressions[0].simplifyStringBuffer();
if (simple != null)
return simple;
}
else if (operator instanceof InvokeOperator
&& (((InvokeOperator)operator).getField()
.getNameAndType().getName().getString().equals("valueOf"))
&& ((InvokeOperator)operator).isStatic()
&& (((InvokeOperator)operator).getField()
.getCpoolClass().getName().getString()
.replace(java.io.File.separatorChar, '.')
.equals("java.lang.String"))
&& subExpressions.length == 1) {
if (subExpressions[0].getType() == Type.tString)
return subExpressions[0].simplify();
return new ComplexExpression
(new StringAddOperator(), new Expression[]
{ emptyString, subExpressions[0].simplify() });
}
else {
Expression stringExpr = simplifyString();
if (stringExpr != null)
return stringExpr.simplify();
}
for (int i=0; i< subExpressions.length; i++) {
subExpressions[i] = subExpressions[i].simplify();

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