Open-source multiplayer game server compatible with the RuneScape client
https://www.openrs2.org/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82 lines
2.2 KiB
82 lines
2.2 KiB
package org.openrs2.asm
|
|
|
|
import org.objectweb.asm.Type
|
|
import org.objectweb.asm.tree.AbstractInsnNode
|
|
import org.objectweb.asm.tree.InsnList
|
|
import org.objectweb.asm.tree.LabelNode
|
|
import org.objectweb.asm.tree.MethodInsnNode
|
|
|
|
private val ANY_INSN = { _: AbstractInsnNode -> true }
|
|
|
|
public fun getExpression(
|
|
last: AbstractInsnNode,
|
|
filter: (AbstractInsnNode) -> Boolean = ANY_INSN,
|
|
initialHeight: Int = 0
|
|
): List<AbstractInsnNode>? {
|
|
val expr = mutableListOf<AbstractInsnNode>()
|
|
|
|
var height = initialHeight
|
|
var insn: AbstractInsnNode? = last
|
|
do {
|
|
val (pops, pushes) = insn!!.stackMetadata
|
|
expr.add(insn)
|
|
if (insn !== last || initialHeight != 0) {
|
|
height -= pushes
|
|
}
|
|
height += pops
|
|
|
|
if (height == 0) {
|
|
return expr.asReversed()
|
|
}
|
|
|
|
insn = insn.previous
|
|
} while (insn != null && insn.isSequential && filter(insn))
|
|
|
|
return null
|
|
}
|
|
|
|
public fun getArgumentExpressions(
|
|
invoke: MethodInsnNode,
|
|
filter: (AbstractInsnNode) -> Boolean = ANY_INSN
|
|
): List<List<AbstractInsnNode>>? {
|
|
val exprs = mutableListOf<List<AbstractInsnNode>>()
|
|
|
|
var insn: AbstractInsnNode = invoke.previous ?: return null
|
|
|
|
for (type in Type.getArgumentTypes(invoke.desc)) {
|
|
val expr = getExpression(insn, filter, type.size) ?: return null
|
|
exprs += expr
|
|
|
|
insn = expr.first().previous ?: return null
|
|
}
|
|
|
|
return exprs.asReversed()
|
|
}
|
|
|
|
public fun InsnList.replaceExpression(
|
|
last: AbstractInsnNode,
|
|
replacement: AbstractInsnNode,
|
|
filter: (AbstractInsnNode) -> Boolean = ANY_INSN
|
|
): Boolean {
|
|
val expr = getExpression(last, filter) ?: return false
|
|
expr.filter { it !== last }.forEach(this::remove)
|
|
this[last] = replacement
|
|
return true
|
|
}
|
|
|
|
public fun InsnList.deleteExpression(
|
|
last: AbstractInsnNode,
|
|
filter: (AbstractInsnNode) -> Boolean = ANY_INSN
|
|
): Boolean {
|
|
val expr = getExpression(last, filter) ?: return false
|
|
expr.forEach(this::remove)
|
|
return true
|
|
}
|
|
|
|
public fun InsnList.clone(labels: Map<LabelNode, LabelNode>): InsnList {
|
|
val copy = InsnList()
|
|
for (insn in this) {
|
|
copy.add(insn.clone(labels))
|
|
}
|
|
return copy
|
|
}
|
|
|