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

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

@@ -0,0 +1,62 @@
+/*
+ * BCJDecoder
+ *
+ * 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;
+
+import java.io.InputStream;
+import org.tukaani.xz.simple.*;
+
+class BCJDecoder extends BCJCoder implements FilterDecoder {
+    private final long filterID;
+    private final int startOffset;
+
+    BCJDecoder(long filterID, byte[] props)
+            throws UnsupportedOptionsException {
+        assert isBCJFilterID(filterID);
+        this.filterID = filterID;
+
+        if (props.length == 0) {
+            startOffset = 0;
+        } else if (props.length == 4) {
+            int n = 0;
+            for (int i = 0; i < 4; ++i)
+                n |= (props[i] & 0xFF) << (i * 8);
+
+            startOffset = n;
+        } else {
+            throw new UnsupportedOptionsException(
+                    "Unsupported BCJ filter properties");
+        }
+    }
+
+    public int getMemoryUsage() {
+        return SimpleInputStream.getMemoryUsage();
+    }
+
+    public InputStream getInputStream(InputStream in) {
+        SimpleFilter simpleFilter = null;
+
+        if (filterID == X86_FILTER_ID)
+            simpleFilter = new X86(false, startOffset);
+        else if (filterID == POWERPC_FILTER_ID)
+            simpleFilter = new PowerPC(false, startOffset);
+        else if (filterID == IA64_FILTER_ID)
+            simpleFilter = new IA64(false, startOffset);
+        else if (filterID == ARM_FILTER_ID)
+            simpleFilter = new ARM(false, startOffset);
+        else if (filterID == ARMTHUMB_FILTER_ID)
+            simpleFilter = new ARMThumb(false, startOffset);
+        else if (filterID == SPARC_FILTER_ID)
+            simpleFilter = new SPARC(false, startOffset);
+        else
+            assert false;
+
+        return new SimpleInputStream(in, simpleFilter);
+    }
+}