Open-source multiplayer game server compatible with the RuneScape client
https://www.openrs2.org/
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65 lines
2.6 KiB
65 lines
2.6 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.Expression
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import com.github.javaparser.ast.expr.IntegerLiteralExpr
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import com.github.javaparser.ast.expr.LongLiteralExpr
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import com.github.javaparser.ast.expr.UnaryExpr
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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.checkedAsInt
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import org.openrs2.deob.ast.util.checkedAsLong
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import org.openrs2.deob.ast.util.isIntegerOrLongLiteral
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import org.openrs2.deob.ast.util.toLongLiteralExpr
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import org.openrs2.deob.ast.util.walk
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@Singleton
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public class ComplementTransformer : 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 = complement(expr.operator) ?: 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.isIntegerOrLongLiteral() && right.isIntegerOrLongLiteral()
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if (left.isComplementOrLiteral() && right.isComplementOrLiteral() && !bothLiteral) {
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expr.operator = op
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expr.left = left.complement()
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expr.right = right.complement()
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}
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}
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}
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private companion object {
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private fun Expression.isComplement(): Boolean {
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return this is UnaryExpr && operator == UnaryExpr.Operator.BITWISE_COMPLEMENT
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}
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private fun Expression.isComplementOrLiteral(): Boolean {
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return isComplement() || isIntegerOrLongLiteral()
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}
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private fun complement(op: BinaryExpr.Operator): BinaryExpr.Operator? {
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return when (op) {
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BinaryExpr.Operator.EQUALS, BinaryExpr.Operator.NOT_EQUALS -> op
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BinaryExpr.Operator.GREATER -> BinaryExpr.Operator.LESS
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BinaryExpr.Operator.GREATER_EQUALS -> BinaryExpr.Operator.LESS_EQUALS
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BinaryExpr.Operator.LESS -> BinaryExpr.Operator.GREATER
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BinaryExpr.Operator.LESS_EQUALS -> BinaryExpr.Operator.GREATER_EQUALS
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else -> null
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}
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}
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private fun Expression.complement(): Expression {
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return when (this) {
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is UnaryExpr -> expression
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is IntegerLiteralExpr -> IntegerLiteralExpr(checkedAsInt().inv().toString())
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is LongLiteralExpr -> checkedAsLong().inv().toLongLiteralExpr()
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else -> throw IllegalArgumentException()
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}
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}
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}
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}
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