Now can download .pack.xz file for Forge library.

HMCLAPI/src/main/java/org/tukaani/xz/BCJEncoder.java

@@ -0,0 +1,48 @@
+/*
+ * BCJEncoder
+ *
+ * Author: Lasse Collin <lasse.collin@tukaani.org>
+ *
+ * This file has been put into the public domain.
+ * You can do whatever you want with this file.
+ */
+
+package org.tukaani.xz;
+
+class BCJEncoder extends BCJCoder implements FilterEncoder {
+    private final BCJOptions options;
+    private final long filterID;
+    private final byte[] props;
+
+    BCJEncoder(BCJOptions options, long filterID) {
+        assert isBCJFilterID(filterID);
+        int startOffset = options.getStartOffset();
+
+        if (startOffset == 0) {
+            props = new byte[0];
+        } else {
+            props = new byte[4];
+            for (int i = 0; i < 4; ++i)
+                props[i] = (byte)(startOffset >>> (i * 8));
+        }
+
+        this.filterID = filterID;
+        this.options = (BCJOptions)options.clone();
+    }
+
+    public long getFilterID() {
+        return filterID;
+    }
+
+    public byte[] getFilterProps() {
+        return props;
+    }
+
+    public boolean supportsFlushing() {
+        return false;
+    }
+
+    public FinishableOutputStream getOutputStream(FinishableOutputStream out) {
+        return options.getOutputStream(out);
+    }
+}