Open-source multiplayer game server compatible with the RuneScape client
https://www.openrs2.org/
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39 lines
1015 B
39 lines
1015 B
package dev.openrs2.asm
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import org.objectweb.asm.tree.AbstractInsnNode
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import org.objectweb.asm.tree.InsnList
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fun InsnList.replaceSimpleExpression(last: AbstractInsnNode, replacement: AbstractInsnNode?): Boolean {
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val deadInsns = mutableListOf<AbstractInsnNode>()
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var height = 0
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var insn: AbstractInsnNode? = last
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do {
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val (pops, pushes) = insn!!.stackMetadata()
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if (insn !== last) {
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deadInsns.add(insn)
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height -= pushes
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}
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height += pops
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if (height == 0) {
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deadInsns.forEach(this::remove)
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if (replacement != null) {
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this[last] = replacement
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} else {
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remove(last)
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}
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return true
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}
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insn = insn.previous
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} while (insn != null && insn.type != AbstractInsnNode.LABEL && insn.pure)
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return false
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}
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fun InsnList.deleteSimpleExpression(last: AbstractInsnNode): Boolean {
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return replaceSimpleExpression(last, null)
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}
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