Open-source multiplayer game server compatible with the RuneScape client
https://www.openrs2.org/
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62 lines
2.1 KiB
62 lines
2.1 KiB
package org.openrs2.deob.ast.transform
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import com.github.javaparser.ast.CompilationUnit
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import com.github.javaparser.ast.expr.BinaryExpr
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import com.github.javaparser.ast.expr.BinaryExpr.Operator.EQUALS
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import com.github.javaparser.ast.expr.BinaryExpr.Operator.NOT_EQUALS
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import com.github.javaparser.ast.expr.BooleanLiteralExpr
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import com.github.javaparser.ast.expr.Expression
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import com.github.javaparser.ast.expr.UnaryExpr
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import com.github.javaparser.ast.expr.UnaryExpr.Operator.LOGICAL_COMPLEMENT
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import jakarta.inject.Singleton
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import org.openrs2.deob.ast.Library
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import org.openrs2.deob.ast.LibraryGroup
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import org.openrs2.deob.ast.util.not
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import org.openrs2.deob.ast.util.walk
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@Singleton
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public class NotTransformer : Transformer() {
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override fun transformUnit(group: LibraryGroup, library: Library, unit: CompilationUnit) {
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unit.walk { expr: BinaryExpr ->
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val op = expr.operator.flip() ?: return@walk
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val left = expr.left
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val right = expr.right
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val bothLiteral = left is BooleanLiteralExpr && right is BooleanLiteralExpr
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if (bothLiteral) {
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return@walk
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}
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val leftNotOrLiteral = left.isNotOrLiteral()
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val rightNotOrLiteral = right.isNotOrLiteral()
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if (leftNotOrLiteral && rightNotOrLiteral) {
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expr.left = left.not()
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expr.right = right.not()
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return@walk
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} else if (leftNotOrLiteral) {
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expr.operator = op
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expr.left = left.not()
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} else if (rightNotOrLiteral) {
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expr.operator = op
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expr.right = right.not()
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}
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}
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}
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private fun Expression.isNot(): Boolean {
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return this is UnaryExpr && operator == LOGICAL_COMPLEMENT
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}
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private fun Expression.isNotOrLiteral(): Boolean {
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return isNot() || this is BooleanLiteralExpr
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}
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private fun BinaryExpr.Operator.flip(): BinaryExpr.Operator? {
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return when (this) {
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EQUALS -> NOT_EQUALS
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NOT_EQUALS -> EQUALS
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else -> null
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}
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}
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}
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