Open-source multiplayer game server compatible with the RuneScape client
https://www.openrs2.org/
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52 lines
1.9 KiB
52 lines
1.9 KiB
package dev.openrs2.asm.io
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import dev.openrs2.asm.ClassVersionUtils
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import dev.openrs2.asm.NopClassVisitor
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import dev.openrs2.asm.classpath.ClassPath
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import dev.openrs2.asm.classpath.Library
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import dev.openrs2.asm.classpath.StackFrameClassWriter
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import dev.openrs2.util.io.DeterministicJarOutputStream
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import org.objectweb.asm.ClassWriter
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import org.objectweb.asm.Opcodes
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import org.objectweb.asm.util.CheckClassAdapter
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import java.io.OutputStream
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import java.util.jar.JarEntry
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import java.util.jar.JarOutputStream
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open class JarLibraryWriter : LibraryWriter {
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override fun write(output: OutputStream, classPath: ClassPath, library: Library) {
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createJarOutputStream(output).use { jar ->
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for (clazz in library) {
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val writer = if (ClassVersionUtils.gte(clazz.version, Opcodes.V1_7)) {
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StackFrameClassWriter(classPath)
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} else {
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ClassWriter(ClassWriter.COMPUTE_MAXS)
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}
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clazz.accept(writer)
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jar.putNextEntry(JarEntry(clazz.name + CLASS_SUFFIX))
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jar.write(writer.toByteArray())
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/*
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* XXX(gpe): CheckClassAdapter breaks the Label offset
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* calculation in the OriginalPcTable's write method, so we do
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* a second pass without any attributes to check the class,
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* feeding the callbacks into a no-op visitor.
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*/
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for (method in clazz.methods) {
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method.attrs?.clear()
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}
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clazz.accept(CheckClassAdapter(NopClassVisitor, true))
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}
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}
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}
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protected open fun createJarOutputStream(output: OutputStream): JarOutputStream {
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return DeterministicJarOutputStream(output)
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}
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private companion object {
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private const val CLASS_SUFFIX = ".class"
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}
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}
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