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Fix #167 - infinite loop representation
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83 changes: 83 additions & 0 deletions
83
...er/bytecode/analysis/structured/statement/AbstractStructuredConditionalLoopStatement.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package org.benf.cfr.reader.bytecode.analysis.structured.statement; | ||
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| import org.benf.cfr.reader.bytecode.analysis.opgraph.Op04StructuredStatement; | ||
| import org.benf.cfr.reader.bytecode.analysis.parse.expression.ConditionalExpression; | ||
| import org.benf.cfr.reader.bytecode.analysis.parse.rewriters.ExpressionRewriter; | ||
| import org.benf.cfr.reader.bytecode.analysis.parse.utils.BlockIdentifier; | ||
| import org.benf.cfr.reader.bytecode.analysis.parse.utils.scope.LValueScopeDiscoverer; | ||
| import org.benf.cfr.reader.bytecode.analysis.structured.StructuredStatement; | ||
| import org.benf.cfr.reader.state.TypeUsageCollector; | ||
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| import java.util.List; | ||
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| // do / while. | ||
| public abstract class AbstractStructuredConditionalLoopStatement extends AbstractStructuredBlockStatement { | ||
| protected ConditionalExpression condition; | ||
| protected final BlockIdentifier block; | ||
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| AbstractStructuredConditionalLoopStatement(ConditionalExpression condition, BlockIdentifier block, Op04StructuredStatement body) { | ||
| super(body); | ||
| this.condition = condition; | ||
| this.block = block; | ||
| } | ||
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| public BlockIdentifier getBlock() { | ||
| return block; | ||
| } | ||
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| public ConditionalExpression getCondition() { | ||
| return condition; | ||
| } | ||
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| @Override | ||
| public BlockIdentifier getBreakableBlockOrNull() { | ||
| return block; | ||
| } | ||
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| @Override | ||
| public boolean supportsBreak() { | ||
| return true; | ||
| } | ||
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| @Override | ||
| public void collectTypeUsages(TypeUsageCollector collector) { | ||
| collector.collectFrom(condition); | ||
| super.collectTypeUsages(collector); | ||
| } | ||
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| public boolean isInfinite() { | ||
| return condition == null; | ||
| } | ||
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| @Override | ||
| public boolean isScopeBlock() { | ||
| return true; | ||
| } | ||
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| @Override | ||
| public boolean supportsContinueBreak() { | ||
| return true; | ||
| } | ||
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| @Override | ||
| public void traceLocalVariableScope(LValueScopeDiscoverer scopeDiscoverer) { | ||
| if (condition != null) { | ||
| condition.collectUsedLValues(scopeDiscoverer); | ||
| } | ||
| scopeDiscoverer.processOp04Statement(getBody()); | ||
| } | ||
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| @Override | ||
| public void linearizeInto(List<StructuredStatement> out) { | ||
| out.add(this); | ||
| getBody().linearizeStatementsInto(out); | ||
| } | ||
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| @Override | ||
| public void rewriteExpressions(ExpressionRewriter expressionRewriter) { | ||
| if (condition != null) { | ||
| condition = expressionRewriter.rewriteExpression(condition, null, this.getContainer(), null); | ||
| } | ||
| } | ||
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| } |
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