Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/java/core/src/main/java/com/google/protobuf/UnsafeUtil.java

Index: third_party/protobuf/java/core/src/main/java/com/google/protobuf/UnsafeUtil.java
diff --git a/third_party/protobuf/java/core/src/main/java/com/google/protobuf/UnsafeUtil.java b/third_party/protobuf/java/core/src/main/java/com/google/protobuf/UnsafeUtil.java
deleted file mode 100644
index 5f7bafd602bea27a1032a45f6814d66096b5d8e2..0000000000000000000000000000000000000000
--- a/third_party/protobuf/java/core/src/main/java/com/google/protobuf/UnsafeUtil.java
+++ /dev/null
@@ -1,295 +0,0 @@
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-package com.google.protobuf;
-
-import java.lang.reflect.Field;
-import java.nio.Buffer;
-import java.nio.ByteBuffer;
-import java.security.AccessController;
-import java.security.PrivilegedExceptionAction;
-import sun.misc.Unsafe;
-
-/** Utility class for working with unsafe operations. */
-// TODO(nathanmittler): Add support for Android Memory/MemoryBlock
-final class UnsafeUtil {
-  private static final sun.misc.Unsafe UNSAFE = getUnsafe();
-  private static final boolean HAS_UNSAFE_BYTEBUFFER_OPERATIONS =
-      supportsUnsafeByteBufferOperations();
-  private static final boolean HAS_UNSAFE_ARRAY_OPERATIONS = supportsUnsafeArrayOperations();
-  private static final long ARRAY_BASE_OFFSET = byteArrayBaseOffset();
-  private static final long BUFFER_ADDRESS_OFFSET = fieldOffset(field(Buffer.class, "address"));
-
-  private UnsafeUtil() {}
-
-  static boolean hasUnsafeArrayOperations() {
-    return HAS_UNSAFE_ARRAY_OPERATIONS;
-  }
-
-  static boolean hasUnsafeByteBufferOperations() {
-    return HAS_UNSAFE_BYTEBUFFER_OPERATIONS;
-  }
-
-  static Object allocateInstance(Class<?> clazz) {
-    try {
-      return UNSAFE.allocateInstance(clazz);
-    } catch (InstantiationException e) {
-      throw new RuntimeException(e);
-    }
-  }
-
-  static long objectFieldOffset(Field field) {
-    return UNSAFE.objectFieldOffset(field);
-  }
-
-  static long getArrayBaseOffset() {
-    return ARRAY_BASE_OFFSET;
-  }
-
-  static byte getByte(Object target, long offset) {
-    return UNSAFE.getByte(target, offset);
-  }
-
-  static void putByte(Object target, long offset, byte value) {
-    UNSAFE.putByte(target, offset, value);
-  }
-
-  static int getInt(Object target, long offset) {
-    return UNSAFE.getInt(target, offset);
-  }
-
-  static void putInt(Object target, long offset, int value) {
-    UNSAFE.putInt(target, offset, value);
-  }
-
-  static long getLong(Object target, long offset) {
-    return UNSAFE.getLong(target, offset);
-  }
-
-  static void putLong(Object target, long offset, long value) {
-    UNSAFE.putLong(target, offset, value);
-  }
-
-  static boolean getBoolean(Object target, long offset) {
-    return UNSAFE.getBoolean(target, offset);
-  }
-
-  static void putBoolean(Object target, long offset, boolean value) {
-    UNSAFE.putBoolean(target, offset, value);
-  }
-
-  static float getFloat(Object target, long offset) {
-    return UNSAFE.getFloat(target, offset);
-  }
-
-  static void putFloat(Object target, long offset, float value) {
-    UNSAFE.putFloat(target, offset, value);
-  }
-
-  static double getDouble(Object target, long offset) {
-    return UNSAFE.getDouble(target, offset);
-  }
-
-  static void putDouble(Object target, long offset, double value) {
-    UNSAFE.putDouble(target, offset, value);
-  }
-
-  static Object getObject(Object target, long offset) {
-    return UNSAFE.getObject(target, offset);
-  }
-
-  static void putObject(Object target, long offset, Object value) {
-    UNSAFE.putObject(target, offset, value);
-  }
-
-  static void copyMemory(
-      Object src, long srcOffset, Object target, long targetOffset, long length) {
-    UNSAFE.copyMemory(src, srcOffset, target, targetOffset, length);
-  }
-
-  static byte getByte(long address) {
-    return UNSAFE.getByte(address);
-  }
-
-  static void putByte(long address, byte value) {
-    UNSAFE.putByte(address, value);
-  }
-
-  static int getInt(long address) {
-    return UNSAFE.getInt(address);
-  }
-
-  static void putInt(long address, int value) {
-    UNSAFE.putInt(address, value);
-  }
-
-  static long getLong(long address) {
-    return UNSAFE.getLong(address);
-  }
-
-  static void putLong(long address, long value) {
-    UNSAFE.putLong(address, value);
-  }
-
-  static void copyMemory(long srcAddress, long targetAddress, long length) {
-    UNSAFE.copyMemory(srcAddress, targetAddress, length);
-  }
-
-  static void setMemory(long address, long numBytes, byte value) {
-    UNSAFE.setMemory(address, numBytes, value);
-  }
-
-  /**
-   * Gets the offset of the {@code address} field of the given direct {@link ByteBuffer}.
-   */
-  static long addressOffset(ByteBuffer buffer) {
-    return UNSAFE.getLong(buffer, BUFFER_ADDRESS_OFFSET);
-  }
-
-  /**
-   * Gets the {@code sun.misc.Unsafe} instance, or {@code null} if not available on this platform.
-   */
-  private static sun.misc.Unsafe getUnsafe() {
-    sun.misc.Unsafe unsafe = null;
-    try {
-      unsafe =
-          AccessController.doPrivileged(
-              new PrivilegedExceptionAction<Unsafe>() {
-                @Override
-                public sun.misc.Unsafe run() throws Exception {
-                  Class<sun.misc.Unsafe> k = sun.misc.Unsafe.class;
-
-                  for (Field f : k.getDeclaredFields()) {
-                    f.setAccessible(true);
-                    Object x = f.get(null);
-                    if (k.isInstance(x)) {
-                      return k.cast(x);
-                    }
-                  }
-                  // The sun.misc.Unsafe field does not exist.
-                  return null;
-                }
-              });
-    } catch (Throwable e) {
-      // Catching Throwable here due to the fact that Google AppEngine raises NoClassDefFoundError
-      // for Unsafe.
-    }
-    return unsafe;
-  }
-
-  /** Indicates whether or not unsafe array operations are supported on this platform. */
-  private static boolean supportsUnsafeArrayOperations() {
-    boolean supported = false;
-    if (UNSAFE != null) {
-      try {
-        Class<?> clazz = UNSAFE.getClass();
-        clazz.getMethod("objectFieldOffset", Field.class);
-        clazz.getMethod("allocateInstance", Class.class);
-        clazz.getMethod("arrayBaseOffset", Class.class);
-        clazz.getMethod("getByte", Object.class, long.class);
-        clazz.getMethod("putByte", Object.class, long.class, byte.class);
-        clazz.getMethod("getBoolean", Object.class, long.class);
-        clazz.getMethod("putBoolean", Object.class, long.class, boolean.class);
-        clazz.getMethod("getInt", Object.class, long.class);
-        clazz.getMethod("putInt", Object.class, long.class, int.class);
-        clazz.getMethod("getLong", Object.class, long.class);
-        clazz.getMethod("putLong", Object.class, long.class, long.class);
-        clazz.getMethod("getFloat", Object.class, long.class);
-        clazz.getMethod("putFloat", Object.class, long.class, float.class);
-        clazz.getMethod("getDouble", Object.class, long.class);
-        clazz.getMethod("putDouble", Object.class, long.class, double.class);
-        clazz.getMethod("getObject", Object.class, long.class);
-        clazz.getMethod("putObject", Object.class, long.class, Object.class);
-        clazz.getMethod(
-            "copyMemory", Object.class, long.class, Object.class, long.class, long.class);
-        supported = true;
-      } catch (Throwable e) {
-        // Do nothing.
-      }
-    }
-    return supported;
-  }
-
-  private static boolean supportsUnsafeByteBufferOperations() {
-    boolean supported = false;
-    if (UNSAFE != null) {
-      try {
-        Class<?> clazz = UNSAFE.getClass();
-        // Methods for getting direct buffer address.
-        clazz.getMethod("objectFieldOffset", Field.class);
-        clazz.getMethod("getLong", Object.class, long.class);
-
-        clazz.getMethod("getByte", long.class);
-        clazz.getMethod("putByte", long.class, byte.class);
-        clazz.getMethod("getInt", long.class);
-        clazz.getMethod("putInt", long.class, int.class);
-        clazz.getMethod("getLong", long.class);
-        clazz.getMethod("putLong", long.class, long.class);
-        clazz.getMethod("setMemory", long.class, long.class, byte.class);
-        clazz.getMethod("copyMemory", long.class, long.class, long.class);
-        supported = true;
-      } catch (Throwable e) {
-        // Do nothing.
-      }
-    }
-    return supported;
-  }
-
-  /**
-   * Get the base offset for byte arrays, or {@code -1} if {@code sun.misc.Unsafe} is not available.
-   */
-  private static int byteArrayBaseOffset() {
-    return HAS_UNSAFE_ARRAY_OPERATIONS ? UNSAFE.arrayBaseOffset(byte[].class) : -1;
-  }
-
-  /**
-   * Returns the offset of the provided field, or {@code -1} if {@code sun.misc.Unsafe} is not
-   * available.
-   */
-  private static long fieldOffset(Field field) {
-    return field == null || UNSAFE == null ? -1 : UNSAFE.objectFieldOffset(field);
-  }
-
-  /**
-   * Gets the field with the given name within the class, or {@code null} if not found. If found,
-   * the field is made accessible.
-   */
-  private static Field field(Class<?> clazz, String fieldName) {
-    Field field;
-    try {
-      field = clazz.getDeclaredField(fieldName);
-      field.setAccessible(true);
-    } catch (Throwable t) {
-      // Failed to access the fields.
-      field = null;
-    }
-    return field;
-  }
-}