Open-source multiplayer game server compatible with the RuneScape client
https://www.openrs2.org/
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45 lines
1.5 KiB
45 lines
1.5 KiB
package org.openrs2.compress.bzip2
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import com.github.michaelbull.logging.InlineLogger
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import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream
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import org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream
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import org.openrs2.util.io.SkipOutputStream
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import java.io.ByteArrayInputStream
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import java.io.InputStream
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import java.io.OutputStream
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import java.io.SequenceInputStream
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public object Bzip2 {
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private const val BLOCK_SIZE = 1
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private val HEADER = byteArrayOf(
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'B'.code.toByte(),
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'Z'.code.toByte(),
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'h'.code.toByte(),
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('0' + BLOCK_SIZE).code.toByte()
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)
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private val logger = InlineLogger()
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private val library: LibBzip2? = try {
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LibBzip2.load()
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} catch (ex: Throwable) {
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logger.warn(ex) {
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"Falling back to pure Java bzip2 implementation, " +
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"output may not be bit-for-bit identical to Jagex's implementation"
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}
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null
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}
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public fun createHeaderlessInputStream(input: InputStream): InputStream {
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return BZip2CompressorInputStream(SequenceInputStream(ByteArrayInputStream(HEADER), input))
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}
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public fun createHeaderlessOutputStream(output: OutputStream): OutputStream {
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val skipOutput = SkipOutputStream(output, HEADER.size.toLong())
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return if (library != null) {
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Bzip2OutputStream(library, skipOutput, BLOCK_SIZE)
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} else {
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BZip2CompressorOutputStream(skipOutput, BLOCK_SIZE)
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}
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}
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}
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