forked from openrs2/openrs2
parent
007f7d68ef
commit
8448f74b3c
@ -0,0 +1,62 @@ |
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package org.openrs2.cache |
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import io.netty.buffer.ByteBuf |
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import org.openrs2.buffer.crc32 |
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import org.openrs2.buffer.use |
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public class ChecksumTable( |
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public val entries: MutableList<Int> = mutableListOf() |
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) { |
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public fun write(buf: ByteBuf) { |
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for (entry in entries) { |
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buf.writeInt(entry) |
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} |
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var checksum = 1234 |
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for (entry in entries) { |
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checksum = (checksum shl 1) + entry |
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} |
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buf.writeInt(checksum) |
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} |
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public companion object { |
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public fun create(store: Store): ChecksumTable { |
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val table = ChecksumTable() |
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var nextArchive = 0 |
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for (archive in store.list(0)) { |
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val entry = store.read(0, archive).use { buf -> |
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buf.crc32() |
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} |
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for (i in nextArchive until archive) { |
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table.entries += 0 |
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} |
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table.entries += entry |
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nextArchive = archive + 1 |
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} |
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return table |
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} |
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public fun read(buf: ByteBuf): ChecksumTable { |
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val table = ChecksumTable() |
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var expectedChecksum = 1234 |
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while (buf.readableBytes() >= 8) { |
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val entry = buf.readInt() |
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table.entries += entry |
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expectedChecksum = (expectedChecksum shl 1) + entry |
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} |
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val actualChecksum = buf.readInt() |
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require(expectedChecksum == actualChecksum) |
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return table |
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} |
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} |
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} |
@ -0,0 +1,68 @@ |
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package org.openrs2.cache |
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import org.openrs2.buffer.use |
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public class VersionList( |
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public val files: List<List<File>>, |
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public val maps: Map<Int, MapSquare>, |
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) { |
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public data class File( |
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val version: Int, |
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val checksum: Int |
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) |
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public data class MapSquare( |
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val mapFile: Int, |
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val locFile: Int, |
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val freeToPlay: Boolean |
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) |
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public companion object { |
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private val NAMES = listOf("model", "anim", "midi", "map") |
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public fun read(archive: JagArchive): VersionList { |
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val files = mutableListOf<List<File>>() |
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for (name in NAMES) { |
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val versions = archive.read("${name}_version".uppercase()).use { buf -> |
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IntArray(buf.readableBytes() / 2) { |
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buf.readUnsignedShort() |
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} |
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} |
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val checksums = archive.read("${name}_crc".uppercase()).use { buf -> |
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IntArray(buf.readableBytes() / 4) { |
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buf.readInt() |
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} |
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} |
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require(versions.size == checksums.size) |
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files += versions.zip(checksums, ::File) |
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} |
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val maps = mutableMapOf<Int, MapSquare>() |
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archive.read("map_index".uppercase()).use { buf -> |
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while (buf.readableBytes() >= 7) { |
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val mapSquare = buf.readUnsignedShort() |
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val mapFile = buf.readUnsignedShort() |
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val locFile = buf.readUnsignedShort() |
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val freeToPlay = buf.readBoolean() |
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if (maps.containsKey(mapSquare)) { |
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/* |
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* If there's a map square collision, pick the first |
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* entry for compatibility with the client. |
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*/ |
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continue |
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} |
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maps[mapSquare] = MapSquare(mapFile, locFile, freeToPlay) |
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} |
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} |
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return VersionList(files, maps) |
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} |
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} |
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} |
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