Open-source multiplayer game server compatible with the RuneScape client https://www.openrs2.org/
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openrs2/bundler/src/main/java/org/openrs2/bundler/transform/MacResizeTransformer.kt

76 lines
2.4 KiB

package org.openrs2.bundler.transform
import com.github.michaelbull.logging.InlineLogger
import org.objectweb.asm.Opcodes
import org.objectweb.asm.tree.ClassNode
import org.objectweb.asm.tree.FieldInsnNode
import org.objectweb.asm.tree.JumpInsnNode
import org.objectweb.asm.tree.LdcInsnNode
import org.objectweb.asm.tree.MethodInsnNode
import org.objectweb.asm.tree.MethodNode
import org.openrs2.asm.InsnMatcher
import org.openrs2.asm.classpath.ClassPath
import org.openrs2.asm.classpath.Library
import org.openrs2.asm.transform.Transformer
import javax.inject.Singleton
@Singleton
public class MacResizeTransformer : Transformer() {
private var branchesRemoved = 0
override fun preTransform(classPath: ClassPath) {
branchesRemoved = 0
}
override fun transformCode(classPath: ClassPath, library: Library, clazz: ClassNode, method: MethodNode): Boolean {
for (match in DETECT_MAC_MATCHER.match(method)) {
val getstatic = match[0] as FieldInsnNode
if (
getstatic.owner == "loader" ||
getstatic.owner == "loader!loader" ||
getstatic.owner == clazz.name ||
getstatic.desc != "Ljava/lang/String;"
) {
continue
}
val ldc = match[1] as LdcInsnNode
if (ldc.cst != "mac") {
continue
}
val invokevirtual = match[2] as MethodInsnNode
if (
invokevirtual.owner != "java/lang/String" ||
invokevirtual.name != "startsWith" ||
invokevirtual.desc != "(Ljava/lang/String;)Z"
) {
continue
}
method.instructions.remove(getstatic)
method.instructions.remove(ldc)
method.instructions.remove(invokevirtual)
val branch = match[3] as JumpInsnNode
if (branch.opcode == Opcodes.IFEQ) {
branch.opcode = Opcodes.GOTO
} else {
method.instructions.remove(branch)
}
branchesRemoved++
}
return false
}
override fun postTransform(classPath: ClassPath) {
logger.info { "Removed $branchesRemoved branches to macOS-specific resize logic" }
}
private companion object {
private val logger = InlineLogger()
private val DETECT_MAC_MATCHER = InsnMatcher.compile("GETSTATIC LDC INVOKEVIRTUAL (IFEQ | IFNE)")
}
}