1 files changed, 27 insertions, 0 deletions
diff --git a/dexlib2/src/main/java/com/android/tools/smali/util/InputStreamUtil.java b/dexlib2/src/main/java/com/android/tools/smali/util/InputStreamUtil.java
index 46f696a1..0532f0c2 100644
--- a/dexlib2/src/main/java/com/android/tools/smali/util/InputStreamUtil.java
+++ b/dexlib2/src/main/java/com/android/tools/smali/util/InputStreamUtil.java
@@ -38,6 +38,7 @@ import java.io.DataInput;
 import java.io.EOFException;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStream;
 import java.util.ArrayDeque;
 import java.util.Arrays;
 import java.util.Queue;
@@ -259,4 +260,30 @@ public final class InputStreamUtil {
         }
         return total;
     }
+
+    /**
+     * Copies all bytes from the input stream to the output stream. Does not close or flush either
+     * stream.
+     *
+     * @param from the input stream to read from
+     * @param to the output stream to write to
+     * @return the number of bytes copied
+     * @throws IOException if an I/O error occurs
+     */
+    public static long copy(InputStream from, OutputStream to) throws IOException {
+        if (from == null || to == null) {
+            throw new NullPointerException();
+        }
+        byte[] buf = new byte[BUFFER_SIZE];
+        long total = 0;
+        while (true) {
+            int r = from.read(buf);
+            if (r == -1) {
+                break;
+            }
+            to.write(buf, 0, r);
+            total += r;
+        }
+        return total;
+    }
 }