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fuchsia / third_party / protobuf / 176f7db11d8242b36a3ea6abb1cc436fca5bf75d / . / java / core / src / main / java / com / google / protobuf / BinaryWriter.java
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// 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 static com.google.protobuf.Internal.checkNotNull;
import static com.google.protobuf.WireFormat.FIXED32_SIZE;
import static com.google.protobuf.WireFormat.FIXED64_SIZE;
import static com.google.protobuf.WireFormat.MAX_VARINT32_SIZE;
import static com.google.protobuf.WireFormat.MAX_VARINT64_SIZE;
import static com.google.protobuf.WireFormat.MESSAGE_SET_ITEM;
import static com.google.protobuf.WireFormat.MESSAGE_SET_MESSAGE;
import static com.google.protobuf.WireFormat.MESSAGE_SET_TYPE_ID;
import static com.google.protobuf.WireFormat.WIRETYPE_END_GROUP;
import static com.google.protobuf.WireFormat.WIRETYPE_FIXED32;
import static com.google.protobuf.WireFormat.WIRETYPE_FIXED64;
import static com.google.protobuf.WireFormat.WIRETYPE_LENGTH_DELIMITED;
import static com.google.protobuf.WireFormat.WIRETYPE_START_GROUP;
import static com.google.protobuf.WireFormat.WIRETYPE_VARINT;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.ArrayDeque;
import java.util.List;
import java.util.Map;
import java.util.Queue;
/**
* A protobuf writer that serializes messages in their binary form. Messages are serialized in
* reverse in order to avoid calculating the serialized size of each nested message. Since the
* message size is not known in advance, the writer employs a strategy of chunking and buffer
* chaining. Buffers are allocated as-needed by a provided {@link BufferAllocator}. Once writing is
* finished, the application can access the buffers in forward-writing order by calling {@link
* #complete()}.
*
* <p>Once {@link #complete()} has been called, the writer can not be reused for additional writes.
* The {@link #getTotalBytesWritten()} will continue to reflect the total of the write and will not
* be reset.
*/
@ExperimentalApi
abstract class BinaryWriter extends ByteOutput implements Writer {
public static final int DEFAULT_CHUNK_SIZE = 4096;
private final BufferAllocator alloc;
private final int chunkSize;
final ArrayDeque<AllocatedBuffer> buffers = new ArrayDeque<AllocatedBuffer>(4);
int totalDoneBytes;
/**
* Creates a new {@link BinaryWriter} that will allocate heap buffers of {@link
* #DEFAULT_CHUNK_SIZE} as necessary.
*/
public static BinaryWriter newHeapInstance(BufferAllocator alloc) {
return newHeapInstance(alloc, DEFAULT_CHUNK_SIZE);
}
/**
* Creates a new {@link BinaryWriter} that will allocate heap buffers of {@code chunkSize} as
* necessary.
*/
public static BinaryWriter newHeapInstance(BufferAllocator alloc, int chunkSize) {
return isUnsafeHeapSupported()
? newUnsafeHeapInstance(alloc, chunkSize)
: newSafeHeapInstance(alloc, chunkSize);
}
/**
* Creates a new {@link BinaryWriter} that will allocate direct (i.e. non-heap) buffers of {@link
* #DEFAULT_CHUNK_SIZE} as necessary.
*/
public static BinaryWriter newDirectInstance(BufferAllocator alloc) {
return newDirectInstance(alloc, DEFAULT_CHUNK_SIZE);
}
/**
* Creates a new {@link BinaryWriter} that will allocate direct (i.e. non-heap) buffers of {@code
* chunkSize} as necessary.
*/
public static BinaryWriter newDirectInstance(BufferAllocator alloc, int chunkSize) {
return isUnsafeDirectSupported()
? newUnsafeDirectInstance(alloc, chunkSize)
: newSafeDirectInstance(alloc, chunkSize);
}
static boolean isUnsafeHeapSupported() {
return UnsafeHeapWriter.isSupported();
}
static boolean isUnsafeDirectSupported() {
return UnsafeDirectWriter.isSupported();
}
static BinaryWriter newSafeHeapInstance(BufferAllocator alloc, int chunkSize) {
return new SafeHeapWriter(alloc, chunkSize);
}
static BinaryWriter newUnsafeHeapInstance(BufferAllocator alloc, int chunkSize) {
if (!isUnsafeHeapSupported()) {
throw new UnsupportedOperationException("Unsafe operations not supported");
}
return new UnsafeHeapWriter(alloc, chunkSize);
}
static BinaryWriter newSafeDirectInstance(BufferAllocator alloc, int chunkSize) {
return new SafeDirectWriter(alloc, chunkSize);
}
static BinaryWriter newUnsafeDirectInstance(BufferAllocator alloc, int chunkSize) {
if (!isUnsafeDirectSupported()) {
throw new UnsupportedOperationException("Unsafe operations not supported");
}
return new UnsafeDirectWriter(alloc, chunkSize);
}
/** Only allow subclassing for inner classes. */
private BinaryWriter(BufferAllocator alloc, int chunkSize) {
if (chunkSize <= 0) {
throw new IllegalArgumentException("chunkSize must be > 0");
}
this.alloc = checkNotNull(alloc, "alloc");
this.chunkSize = chunkSize;
}
@Override
public final FieldOrder fieldOrder() {
return FieldOrder.DESCENDING;
}
/**
* Completes the write operation and returns a queue of {@link AllocatedBuffer} objects in
* forward-writing order. This method should only be called once.
*
* <p>After calling this method, the writer can not be reused. Create a new writer for future
* writes.
*/
public final Queue<AllocatedBuffer> complete() {
finishCurrentBuffer();
return buffers;
}
@Override
public final void writeSFixed32(int fieldNumber, int value) throws IOException {
writeFixed32(fieldNumber, value);
}
@Override
public final void writeInt64(int fieldNumber, long value) throws IOException {
writeUInt64(fieldNumber, value);
}
@Override
public final void writeSFixed64(int fieldNumber, long value) throws IOException {
writeFixed64(fieldNumber, value);
}
@Override
public final void writeFloat(int fieldNumber, float value) throws IOException {
writeFixed32(fieldNumber, Float.floatToRawIntBits(value));
}
@Override
public final void writeDouble(int fieldNumber, double value) throws IOException {
writeFixed64(fieldNumber, Double.doubleToRawLongBits(value));
}
@Override
public final void writeEnum(int fieldNumber, int value) throws IOException {
writeInt32(fieldNumber, value);
}
@Override
public final void writeInt32List(int fieldNumber, List<Integer> list, boolean packed)
throws IOException {
if (list instanceof IntArrayList) {
writeInt32List_Internal(fieldNumber, (IntArrayList) list, packed);
} else {
writeInt32List_Internal(fieldNumber, list, packed);
}
}
private final void writeInt32List_Internal(int fieldNumber, List<Integer> list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * MAX_VARINT64_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeInt32(list.get(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeInt32(fieldNumber, list.get(i));
}
}
}
private final void writeInt32List_Internal(int fieldNumber, IntArrayList list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * MAX_VARINT64_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeInt32(list.getInt(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeInt32(fieldNumber, list.getInt(i));
}
}
}
@Override
public final void writeFixed32List(int fieldNumber, List<Integer> list, boolean packed)
throws IOException {
if (list instanceof IntArrayList) {
writeFixed32List_Internal(fieldNumber, (IntArrayList) list, packed);
} else {
writeFixed32List_Internal(fieldNumber, list, packed);
}
}
private final void writeFixed32List_Internal(int fieldNumber, List<Integer> list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * FIXED32_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeFixed32(list.get(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeFixed32(fieldNumber, list.get(i));
}
}
}
private final void writeFixed32List_Internal(int fieldNumber, IntArrayList list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * FIXED32_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeFixed32(list.getInt(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeFixed32(fieldNumber, list.getInt(i));
}
}
}
@Override
public final void writeInt64List(int fieldNumber, List<Long> list, boolean packed)
throws IOException {
writeUInt64List(fieldNumber, list, packed);
}
@Override
public final void writeUInt64List(int fieldNumber, List<Long> list, boolean packed)
throws IOException {
if (list instanceof LongArrayList) {
writeUInt64List_Internal(fieldNumber, (LongArrayList) list, packed);
} else {
writeUInt64List_Internal(fieldNumber, list, packed);
}
}
private final void writeUInt64List_Internal(int fieldNumber, List<Long> list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * MAX_VARINT64_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeVarint64(list.get(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeUInt64(fieldNumber, list.get(i));
}
}
}
private final void writeUInt64List_Internal(int fieldNumber, LongArrayList list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * MAX_VARINT64_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeVarint64(list.getLong(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeUInt64(fieldNumber, list.getLong(i));
}
}
}
@Override
public final void writeFixed64List(int fieldNumber, List<Long> list, boolean packed)
throws IOException {
if (list instanceof LongArrayList) {
writeFixed64List_Internal(fieldNumber, (LongArrayList) list, packed);
} else {
writeFixed64List_Internal(fieldNumber, list, packed);
}
}
private final void writeFixed64List_Internal(int fieldNumber, List<Long> list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * FIXED64_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeFixed64(list.get(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeFixed64(fieldNumber, list.get(i));
}
}
}
private final void writeFixed64List_Internal(int fieldNumber, LongArrayList list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * FIXED64_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeFixed64(list.getLong(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeFixed64(fieldNumber, list.getLong(i));
}
}
}
@Override
public final void writeFloatList(int fieldNumber, List<Float> list, boolean packed)
throws IOException {
if (list instanceof FloatArrayList) {
writeFloatList_Internal(fieldNumber, (FloatArrayList) list, packed);
} else {
writeFloatList_Internal(fieldNumber, list, packed);
}
}
private final void writeFloatList_Internal(int fieldNumber, List<Float> list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * FIXED32_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeFixed32(Float.floatToRawIntBits(list.get(i)));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeFloat(fieldNumber, list.get(i));
}
}
}
private final void writeFloatList_Internal(int fieldNumber, FloatArrayList list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * FIXED32_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeFixed32(Float.floatToRawIntBits(list.getFloat(i)));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeFloat(fieldNumber, list.getFloat(i));
}
}
}
@Override
public final void writeDoubleList(int fieldNumber, List<Double> list, boolean packed)
throws IOException {
if (list instanceof DoubleArrayList) {
writeDoubleList_Internal(fieldNumber, (DoubleArrayList) list, packed);
} else {
writeDoubleList_Internal(fieldNumber, list, packed);
}
}
private final void writeDoubleList_Internal(int fieldNumber, List<Double> list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * FIXED64_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeFixed64(Double.doubleToRawLongBits(list.get(i)));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeDouble(fieldNumber, list.get(i));
}
}
}
private final void writeDoubleList_Internal(int fieldNumber, DoubleArrayList list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * FIXED64_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeFixed64(Double.doubleToRawLongBits(list.getDouble(i)));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeDouble(fieldNumber, list.getDouble(i));
}
}
}
@Override
public final void writeEnumList(int fieldNumber, List<Integer> list, boolean packed)
throws IOException {
writeInt32List(fieldNumber, list, packed);
}
@Override
public final void writeBoolList(int fieldNumber, List<Boolean> list, boolean packed)
throws IOException {
if (list instanceof BooleanArrayList) {
writeBoolList_Internal(fieldNumber, (BooleanArrayList) list, packed);
} else {
writeBoolList_Internal(fieldNumber, list, packed);
}
}
private final void writeBoolList_Internal(int fieldNumber, List<Boolean> list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + list.size());
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeBool(list.get(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeBool(fieldNumber, list.get(i));
}
}
}
private final void writeBoolList_Internal(int fieldNumber, BooleanArrayList list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + list.size());
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeBool(list.getBoolean(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeBool(fieldNumber, list.getBoolean(i));
}
}
}
@Override
public final void writeStringList(int fieldNumber, List<String> list) throws IOException {
if (list instanceof LazyStringList) {
final LazyStringList lazyList = (LazyStringList) list;
for (int i = list.size() - 1; i >= 0; i--) {
writeLazyString(fieldNumber, lazyList.getRaw(i));
}
} else {
for (int i = list.size() - 1; i >= 0; i--) {
writeString(fieldNumber, list.get(i));
}
}
}
private void writeLazyString(int fieldNumber, Object value) throws IOException {
if (value instanceof String) {
writeString(fieldNumber, (String) value);
} else {
writeBytes(fieldNumber, (ByteString) value);
}
}
@Override
public final void writeBytesList(int fieldNumber, List<ByteString> list) throws IOException {
for (int i = list.size() - 1; i >= 0; i--) {
writeBytes(fieldNumber, list.get(i));
}
}
@Override
public final void writeUInt32List(int fieldNumber, List<Integer> list, boolean packed)
throws IOException {
if (list instanceof IntArrayList) {
writeUInt32List_Internal(fieldNumber, (IntArrayList) list, packed);
} else {
writeUInt32List_Internal(fieldNumber, list, packed);
}
}
private final void writeUInt32List_Internal(int fieldNumber, List<Integer> list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * MAX_VARINT32_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeVarint32(list.get(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeUInt32(fieldNumber, list.get(i));
}
}
}
private final void writeUInt32List_Internal(int fieldNumber, IntArrayList list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * MAX_VARINT32_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeVarint32(list.getInt(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeUInt32(fieldNumber, list.getInt(i));
}
}
}
@Override
public final void writeSFixed32List(int fieldNumber, List<Integer> list, boolean packed)
throws IOException {
writeFixed32List(fieldNumber, list, packed);
}
@Override
public final void writeSFixed64List(int fieldNumber, List<Long> list, boolean packed)
throws IOException {
writeFixed64List(fieldNumber, list, packed);
}
@Override
public final void writeSInt32List(int fieldNumber, List<Integer> list, boolean packed)
throws IOException {
if (list instanceof IntArrayList) {
writeSInt32List_Internal(fieldNumber, (IntArrayList) list, packed);
} else {
writeSInt32List_Internal(fieldNumber, list, packed);
}
}
private final void writeSInt32List_Internal(int fieldNumber, List<Integer> list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * MAX_VARINT32_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeSInt32(list.get(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeSInt32(fieldNumber, list.get(i));
}
}
}
private final void writeSInt32List_Internal(int fieldNumber, IntArrayList list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * MAX_VARINT32_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeSInt32(list.getInt(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeSInt32(fieldNumber, list.getInt(i));
}
}
}
@Override
public final void writeSInt64List(int fieldNumber, List<Long> list, boolean packed)
throws IOException {
if (list instanceof LongArrayList) {
writeSInt64List_Internal(fieldNumber, (LongArrayList) list, packed);
} else {
writeSInt64List_Internal(fieldNumber, list, packed);
}
}
private static final int MAP_KEY_NUMBER = 1;
private static final int MAP_VALUE_NUMBER = 2;
@Override
public <K, V> void writeMap(int fieldNumber, MapEntryLite.Metadata<K, V> metadata, Map<K, V> map)
throws IOException {
// TODO(liujisi): Reverse write those entries.
for (Map.Entry<K, V> entry : map.entrySet()) {
int prevBytes = getTotalBytesWritten();
writeMapEntryField(this, MAP_VALUE_NUMBER, metadata.valueType, entry.getValue());
writeMapEntryField(this, MAP_KEY_NUMBER, metadata.keyType, entry.getKey());
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
}
static final void writeMapEntryField(
Writer writer, int fieldNumber, WireFormat.FieldType fieldType, Object object)
throws IOException {
switch (fieldType) {
case BOOL:
writer.writeBool(fieldNumber, (Boolean) object);
break;
case FIXED32:
writer.writeFixed32(fieldNumber, (Integer) object);
break;
case FIXED64:
writer.writeFixed64(fieldNumber, (Long) object);
break;
case INT32:
writer.writeInt32(fieldNumber, (Integer) object);
break;
case INT64:
writer.writeInt64(fieldNumber, (Long) object);
break;
case SFIXED32:
writer.writeSFixed32(fieldNumber, (Integer) object);
break;
case SFIXED64:
writer.writeSFixed64(fieldNumber, (Long) object);
break;
case SINT32:
writer.writeSInt32(fieldNumber, (Integer) object);
break;
case SINT64:
writer.writeSInt64(fieldNumber, (Long) object);
break;
case STRING:
writer.writeString(fieldNumber, (String) object);
break;
case UINT32:
writer.writeUInt32(fieldNumber, (Integer) object);
break;
case UINT64:
writer.writeUInt64(fieldNumber, (Long) object);
break;
case FLOAT:
writer.writeFloat(fieldNumber, (Float) object);
break;
case DOUBLE:
writer.writeDouble(fieldNumber, (Double) object);
break;
case MESSAGE:
writer.writeMessage(fieldNumber, object);
break;
case BYTES:
writer.writeBytes(fieldNumber, (ByteString) object);
break;
case ENUM:
if (object instanceof Internal.EnumLite) {
writer.writeEnum(fieldNumber, ((Internal.EnumLite) object).getNumber());
} else if (object instanceof Integer) {
writer.writeEnum(fieldNumber, (Integer) object);
} else {
throw new IllegalArgumentException("Unexpected type for enum in map.");
}
break;
default:
throw new IllegalArgumentException("Unsupported map value type for: " + fieldType);
}
}
private final void writeSInt64List_Internal(int fieldNumber, List<Long> list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * MAX_VARINT64_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeSInt64(list.get(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeSInt64(fieldNumber, list.get(i));
}
}
}
private final void writeSInt64List_Internal(int fieldNumber, LongArrayList list, boolean packed)
throws IOException {
if (packed) {
requireSpace((MAX_VARINT32_SIZE * 2) + (list.size() * MAX_VARINT64_SIZE));
int prevBytes = getTotalBytesWritten();
for (int i = list.size() - 1; i >= 0; --i) {
writeSInt64(list.getLong(i));
}
int length = getTotalBytesWritten() - prevBytes;
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
} else {
for (int i = list.size() - 1; i >= 0; --i) {
writeSInt64(fieldNumber, list.getLong(i));
}
}
}
@Override
public final void writeMessageList(int fieldNumber, List<?> list) throws IOException {
for (int i = list.size() - 1; i >= 0; i--) {
writeMessage(fieldNumber, list.get(i));
}
}
@Override
public final void writeMessageList(int fieldNumber, List<?> list, Schema schema)
throws IOException {
for (int i = list.size() - 1; i >= 0; i--) {
writeMessage(fieldNumber, list.get(i), schema);
}
}
@Override
public final void writeGroupList(int fieldNumber, List<?> list) throws IOException {
for (int i = list.size() - 1; i >= 0; i--) {
writeGroup(fieldNumber, list.get(i));
}
}
@Override
public final void writeGroupList(int fieldNumber, List<?> list, Schema schema)
throws IOException {
for (int i = list.size() - 1; i >= 0; i--) {
writeGroup(fieldNumber, list.get(i), schema);
}
}
@Override
public final void writeMessageSetItem(int fieldNumber, Object value) throws IOException {
writeTag(MESSAGE_SET_ITEM, WIRETYPE_END_GROUP);
if (value instanceof ByteString) {
writeBytes(MESSAGE_SET_MESSAGE, (ByteString) value);
} else {
writeMessage(MESSAGE_SET_MESSAGE, value);
}
writeUInt32(MESSAGE_SET_TYPE_ID, fieldNumber);
writeTag(MESSAGE_SET_ITEM, WIRETYPE_START_GROUP);
}
final AllocatedBuffer newHeapBuffer() {
return alloc.allocateHeapBuffer(chunkSize);
}
final AllocatedBuffer newHeapBuffer(int capacity) {
return alloc.allocateHeapBuffer(Math.max(capacity, chunkSize));
}
final AllocatedBuffer newDirectBuffer() {
return alloc.allocateDirectBuffer(chunkSize);
}
final AllocatedBuffer newDirectBuffer(int capacity) {
return alloc.allocateDirectBuffer(Math.max(capacity, chunkSize));
}
/**
* Gets the total number of bytes that have been written. This will not be reset by a call to
* {@link #complete()}.
*/
public abstract int getTotalBytesWritten();
abstract void requireSpace(int size);
abstract void finishCurrentBuffer();
abstract void writeTag(int fieldNumber, int wireType);
abstract void writeVarint32(int value);
abstract void writeInt32(int value);
abstract void writeSInt32(int value);
abstract void writeFixed32(int value);
abstract void writeVarint64(long value);
abstract void writeSInt64(long value);
abstract void writeFixed64(long value);
abstract void writeBool(boolean value);
abstract void writeString(String in);
/**
* Not using the version in CodedOutputStream due to the fact that benchmarks have shown a
* performance improvement when returning a byte (rather than an int).
*/
private static byte computeUInt64SizeNoTag(long value) {
// handle two popular special cases up front ...
if ((value & (~0L << 7)) == 0L) {
// Byte 1
return 1;
}
if (value < 0L) {
// Byte 10
return 10;
}
// ... leaving us with 8 remaining, which we can divide and conquer
byte n = 2;
if ((value & (~0L << 35)) != 0L) {
// Byte 6-9
n += 4; // + (value >>> 63);
value >>>= 28;
}
if ((value & (~0L << 21)) != 0L) {
// Byte 4-5 or 8-9
n += 2;
value >>>= 14;
}
if ((value & (~0L << 14)) != 0L) {
// Byte 3 or 7
n += 1;
}
return n;
}
/** Writer that uses safe operations on target array. */
private static final class SafeHeapWriter extends BinaryWriter {
private AllocatedBuffer allocatedBuffer;
private byte[] buffer;
private int offset;
private int limit;
private int offsetMinusOne;
private int limitMinusOne;
private int pos;
SafeHeapWriter(BufferAllocator alloc, int chunkSize) {
super(alloc, chunkSize);
nextBuffer();
}
@Override
void finishCurrentBuffer() {
if (allocatedBuffer != null) {
totalDoneBytes += bytesWrittenToCurrentBuffer();
allocatedBuffer.position((pos - allocatedBuffer.arrayOffset()) + 1);
allocatedBuffer = null;
pos = 0;
limitMinusOne = 0;
}
}
private void nextBuffer() {
nextBuffer(newHeapBuffer());
}
private void nextBuffer(int capacity) {
nextBuffer(newHeapBuffer(capacity));
}
private void nextBuffer(AllocatedBuffer allocatedBuffer) {
if (!allocatedBuffer.hasArray()) {
throw new RuntimeException("Allocator returned non-heap buffer");
}
finishCurrentBuffer();
buffers.addFirst(allocatedBuffer);
this.allocatedBuffer = allocatedBuffer;
this.buffer = allocatedBuffer.array();
int arrayOffset = allocatedBuffer.arrayOffset();
this.limit = arrayOffset + allocatedBuffer.limit();
this.offset = arrayOffset + allocatedBuffer.position();
this.offsetMinusOne = offset - 1;
this.limitMinusOne = limit - 1;
this.pos = limitMinusOne;
}
@Override
public int getTotalBytesWritten() {
return totalDoneBytes + bytesWrittenToCurrentBuffer();
}
int bytesWrittenToCurrentBuffer() {
return limitMinusOne - pos;
}
int spaceLeft() {
return pos - offsetMinusOne;
}
@Override
public void writeUInt32(int fieldNumber, int value) throws IOException {
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeInt32(int fieldNumber, int value) throws IOException {
requireSpace(MAX_VARINT32_SIZE + MAX_VARINT64_SIZE);
writeInt32(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeSInt32(int fieldNumber, int value) throws IOException {
requireSpace(MAX_VARINT32_SIZE * 2);
writeSInt32(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeFixed32(int fieldNumber, int value) throws IOException {
requireSpace(MAX_VARINT32_SIZE + FIXED32_SIZE);
writeFixed32(value);
writeTag(fieldNumber, WIRETYPE_FIXED32);
}
@Override
public void writeUInt64(int fieldNumber, long value) throws IOException {
requireSpace(MAX_VARINT32_SIZE + MAX_VARINT64_SIZE);
writeVarint64(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeSInt64(int fieldNumber, long value) throws IOException {
requireSpace(MAX_VARINT32_SIZE + MAX_VARINT64_SIZE);
writeSInt64(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeFixed64(int fieldNumber, long value) throws IOException {
requireSpace(MAX_VARINT32_SIZE + FIXED64_SIZE);
writeFixed64(value);
writeTag(fieldNumber, WIRETYPE_FIXED64);
}
@Override
public void writeBool(int fieldNumber, boolean value) throws IOException {
requireSpace(MAX_VARINT32_SIZE + 1);
write((byte) (value ? 1 : 0));
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeString(int fieldNumber, String value) throws IOException {
int prevBytes = getTotalBytesWritten();
writeString(value);
int length = getTotalBytesWritten() - prevBytes;
requireSpace(2 * MAX_VARINT32_SIZE);
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeBytes(int fieldNumber, ByteString value) throws IOException {
try {
value.writeToReverse(this);
} catch (IOException e) {
// Should never happen since the writer does not throw.
throw new RuntimeException(e);
}
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(value.size());
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeMessage(int fieldNumber, Object value) throws IOException {
int prevBytes = getTotalBytesWritten();
Protobuf.getInstance().writeTo(value, this);
int length = getTotalBytesWritten() - prevBytes;
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeMessage(int fieldNumber, Object value, Schema schema) throws IOException {
int prevBytes = getTotalBytesWritten();
schema.writeTo(value, this);
int length = getTotalBytesWritten() - prevBytes;
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeGroup(int fieldNumber, Object value) throws IOException {
writeTag(fieldNumber, WIRETYPE_END_GROUP);
Protobuf.getInstance().writeTo(value, this);
writeTag(fieldNumber, WIRETYPE_START_GROUP);
}
@Override
public void writeGroup(int fieldNumber, Object value, Schema schema) throws IOException {
writeTag(fieldNumber, WIRETYPE_END_GROUP);
schema.writeTo(value, this);
writeTag(fieldNumber, WIRETYPE_START_GROUP);
}
@Override
public void writeStartGroup(int fieldNumber) {
writeTag(fieldNumber, WIRETYPE_START_GROUP);
}
@Override
public void writeEndGroup(int fieldNumber) {
writeTag(fieldNumber, WIRETYPE_END_GROUP);
}
@Override
void writeInt32(int value) {
if (value >= 0) {
writeVarint32(value);
} else {
writeVarint64(value);
}
}
@Override
void writeSInt32(int value) {
writeVarint32(CodedOutputStream.encodeZigZag32(value));
}
@Override
void writeSInt64(long value) {
writeVarint64(CodedOutputStream.encodeZigZag64(value));
}
@Override
void writeBool(boolean value) {
write((byte) (value ? 1 : 0));
}
@Override
void writeTag(int fieldNumber, int wireType) {
writeVarint32(WireFormat.makeTag(fieldNumber, wireType));
}
@Override
void writeVarint32(int value) {
if ((value & (~0 << 7)) == 0) {
writeVarint32OneByte(value);
} else if ((value & (~0 << 14)) == 0) {
writeVarint32TwoBytes(value);
} else if ((value & (~0 << 21)) == 0) {
writeVarint32ThreeBytes(value);
} else if ((value & (~0 << 28)) == 0) {
writeVarint32FourBytes(value);
} else {
writeVarint32FiveBytes(value);
}
}
private void writeVarint32OneByte(int value) {
buffer[pos--] = (byte) value;
}
private void writeVarint32TwoBytes(int value) {
buffer[pos--] = (byte) (value >>> 7);
buffer[pos--] = (byte) ((value & 0x7F) | 0x80);
}
private void writeVarint32ThreeBytes(int value) {
buffer[pos--] = (byte) (value >>> 14);
buffer[pos--] = (byte) (((value >>> 7) & 0x7F) | 0x80);
buffer[pos--] = (byte) ((value & 0x7F) | 0x80);
}
private void writeVarint32FourBytes(int value) {
buffer[pos--] = (byte) (value >>> 21);
buffer[pos--] = (byte) (((value >>> 14) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 7) & 0x7F) | 0x80);
buffer[pos--] = (byte) ((value & 0x7F) | 0x80);
}
private void writeVarint32FiveBytes(int value) {
buffer[pos--] = (byte) (value >>> 28);
buffer[pos--] = (byte) (((value >>> 21) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 14) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 7) & 0x7F) | 0x80);
buffer[pos--] = (byte) ((value & 0x7F) | 0x80);
}
@Override
void writeVarint64(long value) {
switch (computeUInt64SizeNoTag(value)) {
case 1:
writeVarint64OneByte(value);
break;
case 2:
writeVarint64TwoBytes(value);
break;
case 3:
writeVarint64ThreeBytes(value);
break;
case 4:
writeVarint64FourBytes(value);
break;
case 5:
writeVarint64FiveBytes(value);
break;
case 6:
writeVarint64SixBytes(value);
break;
case 7:
writeVarint64SevenBytes(value);
break;
case 8:
writeVarint64EightBytes(value);
break;
case 9:
writeVarint64NineBytes(value);
break;
case 10:
writeVarint64TenBytes(value);
break;
}
}
private void writeVarint64OneByte(long value) {
buffer[pos--] = (byte) value;
}
private void writeVarint64TwoBytes(long value) {
buffer[pos--] = (byte) (value >>> 7);
buffer[pos--] = (byte) (((int) value & 0x7F) | 0x80);
}
private void writeVarint64ThreeBytes(long value) {
buffer[pos--] = (byte) (((int) value) >>> 14);
buffer[pos--] = (byte) (((value >>> 7) & 0x7F) | 0x80);
buffer[pos--] = (byte) ((value & 0x7F) | 0x80);
}
private void writeVarint64FourBytes(long value) {
buffer[pos--] = (byte) (value >>> 21);
buffer[pos--] = (byte) (((value >>> 14) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 7) & 0x7F) | 0x80);
buffer[pos--] = (byte) ((value & 0x7F) | 0x80);
}
private void writeVarint64FiveBytes(long value) {
buffer[pos--] = (byte) (value >>> 28);
buffer[pos--] = (byte) (((value >>> 21) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 14) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 7) & 0x7F) | 0x80);
buffer[pos--] = (byte) ((value & 0x7F) | 0x80);
}
private void writeVarint64SixBytes(long value) {
buffer[pos--] = (byte) (value >>> 35);
buffer[pos--] = (byte) (((value >>> 28) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 21) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 14) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 7) & 0x7F) | 0x80);
buffer[pos--] = (byte) ((value & 0x7F) | 0x80);
}
private void writeVarint64SevenBytes(long value) {
buffer[pos--] = (byte) (value >>> 42);
buffer[pos--] = (byte) (((value >>> 35) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 28) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 21) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 14) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 7) & 0x7F) | 0x80);
buffer[pos--] = (byte) ((value & 0x7F) | 0x80);
}
private void writeVarint64EightBytes(long value) {
buffer[pos--] = (byte) (value >>> 49);
buffer[pos--] = (byte) (((value >>> 42) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 35) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 28) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 21) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 14) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 7) & 0x7F) | 0x80);
buffer[pos--] = (byte) ((value & 0x7F) | 0x80);
}
private void writeVarint64NineBytes(long value) {
buffer[pos--] = (byte) (value >>> 56);
buffer[pos--] = (byte) (((value >>> 49) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 42) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 35) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 28) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 21) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 14) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 7) & 0x7F) | 0x80);
buffer[pos--] = (byte) ((value & 0x7F) | 0x80);
}
private void writeVarint64TenBytes(long value) {
buffer[pos--] = (byte) (value >>> 63);
buffer[pos--] = (byte) (((value >>> 56) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 49) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 42) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 35) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 28) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 21) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 14) & 0x7F) | 0x80);
buffer[pos--] = (byte) (((value >>> 7) & 0x7F) | 0x80);
buffer[pos--] = (byte) ((value & 0x7F) | 0x80);
}
@Override
void writeFixed32(int value) {
buffer[pos--] = (byte) ((value >> 24) & 0xFF);
buffer[pos--] = (byte) ((value >> 16) & 0xFF);
buffer[pos--] = (byte) ((value >> 8) & 0xFF);
buffer[pos--] = (byte) (value & 0xFF);
}
@Override
void writeFixed64(long value) {
buffer[pos--] = (byte) ((int) (value >> 56) & 0xFF);
buffer[pos--] = (byte) ((int) (value >> 48) & 0xFF);
buffer[pos--] = (byte) ((int) (value >> 40) & 0xFF);
buffer[pos--] = (byte) ((int) (value >> 32) & 0xFF);
buffer[pos--] = (byte) ((int) (value >> 24) & 0xFF);
buffer[pos--] = (byte) ((int) (value >> 16) & 0xFF);
buffer[pos--] = (byte) ((int) (value >> 8) & 0xFF);
buffer[pos--] = (byte) ((int) (value) & 0xFF);
}
@Override
void writeString(String in) {
// Request enough space to write the ASCII string.
requireSpace(in.length());
// We know the buffer is big enough...
int i = in.length() - 1;
// Set pos to the start of the ASCII string.
pos -= i;
// Designed to take advantage of
// https://wiki.openjdk.java.net/display/HotSpotInternals/RangeCheckElimination
for (char c; i >= 0 && (c = in.charAt(i)) < 0x80; i--) {
buffer[pos + i] = (byte) c;
}
if (i == -1) {
// Move pos past the String.
pos -= 1;
return;
}
pos += i;
for (char c; i >= 0; i--) {
c = in.charAt(i);
if (c < 0x80 && pos > offsetMinusOne) {
buffer[pos--] = (byte) c;
} else if (c < 0x800 && pos > offset) { // 11 bits, two UTF-8 bytes
buffer[pos--] = (byte) (0x80 | (0x3F & c));
buffer[pos--] = (byte) ((0xF << 6) | (c >>> 6));
} else if ((c < Character.MIN_SURROGATE || Character.MAX_SURROGATE < c)
&& pos > (offset + 1)) {
// Maximum single-char code point is 0xFFFF, 16 bits, three UTF-8 bytes
buffer[pos--] = (byte) (0x80 | (0x3F & c));
buffer[pos--] = (byte) (0x80 | (0x3F & (c >>> 6)));
buffer[pos--] = (byte) ((0xF << 5) | (c >>> 12));
} else if (pos > (offset + 2)) {
// Minimum code point represented by a surrogate pair is 0x10000, 17 bits,
// four UTF-8 bytes
char high = 0;
if (i == 0 || !Character.isSurrogatePair(high = in.charAt(i - 1), c)) {
throw new Utf8.UnpairedSurrogateException(i - 1, i);
}
i--;
int codePoint = Character.toCodePoint(high, c);
buffer[pos--] = (byte) (0x80 | (0x3F & codePoint));
buffer[pos--] = (byte) (0x80 | (0x3F & (codePoint >>> 6)));
buffer[pos--] = (byte) (0x80 | (0x3F & (codePoint >>> 12)));
buffer[pos--] = (byte) ((0xF << 4) | (codePoint >>> 18));
} else {
// Buffer is full - allocate a new one and revisit the current character.
requireSpace(i);
i++;
}
}
}
@Override
public void write(byte value) {
buffer[pos--] = value;
}
@Override
public void write(byte[] value, int offset, int length) {
if (spaceLeft() < length) {
nextBuffer(length);
}
pos -= length;
System.arraycopy(value, offset, buffer, pos + 1, length);
}
@Override
public void writeLazy(byte[] value, int offset, int length) {
if (spaceLeft() < length) {
// We consider the value to be immutable (likely the internals of a ByteString). Just
// wrap it in a Netty buffer and add it to the output buffer.
totalDoneBytes += length;
buffers.addFirst(AllocatedBuffer.wrap(value, offset, length));
// Advance the writer to the next buffer.
// TODO(nathanmittler): Consider slicing if space available above some threshold.
nextBuffer();
return;
}
pos -= length;
System.arraycopy(value, offset, buffer, pos + 1, length);
}
@Override
public void write(ByteBuffer value) {
int length = value.remaining();
if (spaceLeft() < length) {
nextBuffer(length);
}
pos -= length;
value.get(buffer, pos + 1, length);
}
@Override
public void writeLazy(ByteBuffer value) {
int length = value.remaining();
if (spaceLeft() < length) {
// We consider the value to be immutable (likely the internals of a ByteString). Just
// wrap it in a Netty buffer and add it to the output buffer.
totalDoneBytes += length;
buffers.addFirst(AllocatedBuffer.wrap(value));
// Advance the writer to the next buffer.
// TODO(nathanmittler): Consider slicing if space available above some threshold.
nextBuffer();
}
pos -= length;
value.get(buffer, pos + 1, length);
}
@Override
void requireSpace(int size) {
if (spaceLeft() < size) {
nextBuffer(size);
}
}
}
/** Writer that uses unsafe operations on a target array. */
private static final class UnsafeHeapWriter extends BinaryWriter {
private AllocatedBuffer allocatedBuffer;
private byte[] buffer;
private long offset;
private long limit;
private long offsetMinusOne;
private long limitMinusOne;
private long pos;
UnsafeHeapWriter(BufferAllocator alloc, int chunkSize) {
super(alloc, chunkSize);
nextBuffer();
}
/** Indicates whether the required unsafe operations are supported on this platform. */
static boolean isSupported() {
return UnsafeUtil.hasUnsafeArrayOperations();
}
@Override
void finishCurrentBuffer() {
if (allocatedBuffer != null) {
totalDoneBytes += bytesWrittenToCurrentBuffer();
allocatedBuffer.position((arrayPos() - allocatedBuffer.arrayOffset()) + 1);
allocatedBuffer = null;
pos = 0;
limitMinusOne = 0;
}
}
private int arrayPos() {
return (int) pos;
}
private void nextBuffer() {
nextBuffer(newHeapBuffer());
}
private void nextBuffer(int capacity) {
nextBuffer(newHeapBuffer(capacity));
}
private void nextBuffer(AllocatedBuffer allocatedBuffer) {
if (!allocatedBuffer.hasArray()) {
throw new RuntimeException("Allocator returned non-heap buffer");
}
finishCurrentBuffer();
buffers.addFirst(allocatedBuffer);
this.allocatedBuffer = allocatedBuffer;
this.buffer = allocatedBuffer.array();
int arrayOffset = allocatedBuffer.arrayOffset();
this.limit = arrayOffset + allocatedBuffer.limit();
this.offset = arrayOffset + allocatedBuffer.position();
this.offsetMinusOne = offset - 1;
this.limitMinusOne = limit - 1;
this.pos = limitMinusOne;
}
@Override
public int getTotalBytesWritten() {
return totalDoneBytes + bytesWrittenToCurrentBuffer();
}
int bytesWrittenToCurrentBuffer() {
return (int) (limitMinusOne - pos);
}
int spaceLeft() {
return (int) (pos - offsetMinusOne);
}
@Override
public void writeUInt32(int fieldNumber, int value) {
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeInt32(int fieldNumber, int value) {
requireSpace(MAX_VARINT32_SIZE + MAX_VARINT64_SIZE);
writeInt32(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeSInt32(int fieldNumber, int value) {
requireSpace(MAX_VARINT32_SIZE * 2);
writeSInt32(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeFixed32(int fieldNumber, int value) {
requireSpace(MAX_VARINT32_SIZE + FIXED32_SIZE);
writeFixed32(value);
writeTag(fieldNumber, WIRETYPE_FIXED32);
}
@Override
public void writeUInt64(int fieldNumber, long value) {
requireSpace(MAX_VARINT32_SIZE + MAX_VARINT64_SIZE);
writeVarint64(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeSInt64(int fieldNumber, long value) {
requireSpace(MAX_VARINT32_SIZE + MAX_VARINT64_SIZE);
writeSInt64(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeFixed64(int fieldNumber, long value) {
requireSpace(MAX_VARINT32_SIZE + FIXED64_SIZE);
writeFixed64(value);
writeTag(fieldNumber, WIRETYPE_FIXED64);
}
@Override
public void writeBool(int fieldNumber, boolean value) {
requireSpace(MAX_VARINT32_SIZE + 1);
write((byte) (value ? 1 : 0));
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeString(int fieldNumber, String value) {
int prevBytes = getTotalBytesWritten();
writeString(value);
int length = getTotalBytesWritten() - prevBytes;
requireSpace(2 * MAX_VARINT32_SIZE);
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeBytes(int fieldNumber, ByteString value) {
try {
value.writeToReverse(this);
} catch (IOException e) {
// Should never happen since the writer does not throw.
throw new RuntimeException(e);
}
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(value.size());
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeMessage(int fieldNumber, Object value) throws IOException {
int prevBytes = getTotalBytesWritten();
Protobuf.getInstance().writeTo(value, this);
int length = getTotalBytesWritten() - prevBytes;
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeMessage(int fieldNumber, Object value, Schema schema) throws IOException {
int prevBytes = getTotalBytesWritten();
schema.writeTo(value, this);
int length = getTotalBytesWritten() - prevBytes;
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeGroup(int fieldNumber, Object value) throws IOException {
writeTag(fieldNumber, WIRETYPE_END_GROUP);
Protobuf.getInstance().writeTo(value, this);
writeTag(fieldNumber, WIRETYPE_START_GROUP);
}
@Override
public void writeGroup(int fieldNumber, Object value, Schema schema) throws IOException {
writeTag(fieldNumber, WIRETYPE_END_GROUP);
schema.writeTo(value, this);
writeTag(fieldNumber, WIRETYPE_START_GROUP);
}
@Override
public void writeStartGroup(int fieldNumber) {
writeTag(fieldNumber, WIRETYPE_START_GROUP);
}
@Override
public void writeEndGroup(int fieldNumber) {
writeTag(fieldNumber, WIRETYPE_END_GROUP);
}
@Override
void writeInt32(int value) {
if (value >= 0) {
writeVarint32(value);
} else {
writeVarint64(value);
}
}
@Override
void writeSInt32(int value) {
writeVarint32(CodedOutputStream.encodeZigZag32(value));
}
@Override
void writeSInt64(long value) {
writeVarint64(CodedOutputStream.encodeZigZag64(value));
}
@Override
void writeBool(boolean value) {
write((byte) (value ? 1 : 0));
}
@Override
void writeTag(int fieldNumber, int wireType) {
writeVarint32(WireFormat.makeTag(fieldNumber, wireType));
}
@Override
void writeVarint32(int value) {
if ((value & (~0 << 7)) == 0) {
writeVarint32OneByte(value);
} else if ((value & (~0 << 14)) == 0) {
writeVarint32TwoBytes(value);
} else if ((value & (~0 << 21)) == 0) {
writeVarint32ThreeBytes(value);
} else if ((value & (~0 << 28)) == 0) {
writeVarint32FourBytes(value);
} else {
writeVarint32FiveBytes(value);
}
}
private void writeVarint32OneByte(int value) {
UnsafeUtil.putByte(buffer, pos--, (byte) value);
}
private void writeVarint32TwoBytes(int value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (value >>> 7));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint32ThreeBytes(int value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (value >>> 14));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint32FourBytes(int value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (value >>> 21));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint32FiveBytes(int value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (value >>> 28));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value & 0x7F) | 0x80));
}
@Override
void writeVarint64(long value) {
switch (computeUInt64SizeNoTag(value)) {
case 1:
writeVarint64OneByte(value);
break;
case 2:
writeVarint64TwoBytes(value);
break;
case 3:
writeVarint64ThreeBytes(value);
break;
case 4:
writeVarint64FourBytes(value);
break;
case 5:
writeVarint64FiveBytes(value);
break;
case 6:
writeVarint64SixBytes(value);
break;
case 7:
writeVarint64SevenBytes(value);
break;
case 8:
writeVarint64EightBytes(value);
break;
case 9:
writeVarint64NineBytes(value);
break;
case 10:
writeVarint64TenBytes(value);
break;
}
}
private void writeVarint64OneByte(long value) {
UnsafeUtil.putByte(buffer, pos--, (byte) value);
}
private void writeVarint64TwoBytes(long value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (value >>> 7));
UnsafeUtil.putByte(buffer, pos--, (byte) (((int) value & 0x7F) | 0x80));
}
private void writeVarint64ThreeBytes(long value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (((int) value) >>> 14));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64FourBytes(long value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (value >>> 21));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64FiveBytes(long value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (value >>> 28));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64SixBytes(long value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (value >>> 35));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 28) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64SevenBytes(long value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (value >>> 42));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 35) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 28) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64EightBytes(long value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (value >>> 49));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 42) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 35) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 28) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64NineBytes(long value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (value >>> 56));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 49) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 42) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 35) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 28) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64TenBytes(long value) {
UnsafeUtil.putByte(buffer, pos--, (byte) (value >>> 63));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 56) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 49) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 42) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 35) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 28) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value & 0x7F) | 0x80));
}
@Override
void writeFixed32(int value) {
UnsafeUtil.putByte(buffer, pos--, (byte) ((value >> 24) & 0xFF));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value >> 16) & 0xFF));
UnsafeUtil.putByte(buffer, pos--, (byte) ((value >> 8) & 0xFF));
UnsafeUtil.putByte(buffer, pos--, (byte) (value & 0xFF));
}
@Override
void writeFixed64(long value) {
UnsafeUtil.putByte(buffer, pos--, (byte) ((int) (value >> 56) & 0xFF));
UnsafeUtil.putByte(buffer, pos--, (byte) ((int) (value >> 48) & 0xFF));
UnsafeUtil.putByte(buffer, pos--, (byte) ((int) (value >> 40) & 0xFF));
UnsafeUtil.putByte(buffer, pos--, (byte) ((int) (value >> 32) & 0xFF));
UnsafeUtil.putByte(buffer, pos--, (byte) ((int) (value >> 24) & 0xFF));
UnsafeUtil.putByte(buffer, pos--, (byte) ((int) (value >> 16) & 0xFF));
UnsafeUtil.putByte(buffer, pos--, (byte) ((int) (value >> 8) & 0xFF));
UnsafeUtil.putByte(buffer, pos--, (byte) ((int) (value) & 0xFF));
}
@Override
void writeString(String in) {
// Request enough space to write the ASCII string.
requireSpace(in.length());
// We know the buffer is big enough...
int i = in.length() - 1;
// Set pos to the start of the ASCII string.
// pos -= i;
// Designed to take advantage of
// https://wiki.openjdk.java.net/display/HotSpotInternals/RangeCheckElimination
for (char c; i >= 0 && (c = in.charAt(i)) < 0x80; i--) {
UnsafeUtil.putByte(buffer, pos--, (byte) c);
}
if (i == -1) {
// Move pos past the String.
return;
}
for (char c; i >= 0; i--) {
c = in.charAt(i);
if (c < 0x80 && pos > offsetMinusOne) {
UnsafeUtil.putByte(buffer, pos--, (byte) c);
} else if (c < 0x800 && pos > offset) { // 11 bits, two UTF-8 bytes
UnsafeUtil.putByte(buffer, pos--, (byte) (0x80 | (0x3F & c)));
UnsafeUtil.putByte(buffer, pos--, (byte) ((0xF << 6) | (c >>> 6)));
} else if ((c < Character.MIN_SURROGATE || Character.MAX_SURROGATE < c)
&& pos > offset + 1) {
// Maximum single-char code point is 0xFFFF, 16 bits, three UTF-8 bytes
UnsafeUtil.putByte(buffer, pos--, (byte) (0x80 | (0x3F & c)));
UnsafeUtil.putByte(buffer, pos--, (byte) (0x80 | (0x3F & (c >>> 6))));
UnsafeUtil.putByte(buffer, pos--, (byte) ((0xF << 5) | (c >>> 12)));
} else if (pos > offset + 2) {
// Minimum code point represented by a surrogate pair is 0x10000, 17 bits,
// four UTF-8 bytes
final char high;
if (i == 0 || !Character.isSurrogatePair(high = in.charAt(i - 1), c)) {
throw new Utf8.UnpairedSurrogateException(i - 1, i);
}
i--;
int codePoint = Character.toCodePoint(high, c);
UnsafeUtil.putByte(buffer, pos--, (byte) (0x80 | (0x3F & codePoint)));
UnsafeUtil.putByte(buffer, pos--, (byte) (0x80 | (0x3F & (codePoint >>> 6))));
UnsafeUtil.putByte(buffer, pos--, (byte) (0x80 | (0x3F & (codePoint >>> 12))));
UnsafeUtil.putByte(buffer, pos--, (byte) ((0xF << 4) | (codePoint >>> 18)));
} else {
// Buffer is full - allocate a new one and revisit the current character.
requireSpace(i);
i++;
}
}
}
@Override
public void write(byte value) {
UnsafeUtil.putByte(buffer, pos--, value);
}
@Override
public void write(byte[] value, int offset, int length) {
if (offset < 0 || offset + length > value.length) {
throw new ArrayIndexOutOfBoundsException(
String.format("value.length=%d, offset=%d, length=%d", value.length, offset, length));
}
requireSpace(length);
pos -= length;
System.arraycopy(value, offset, buffer, arrayPos() + 1, length);
}
@Override
public void writeLazy(byte[] value, int offset, int length) {
if (offset < 0 || offset + length > value.length) {
throw new ArrayIndexOutOfBoundsException(
String.format("value.length=%d, offset=%d, length=%d", value.length, offset, length));
}
if (spaceLeft() < length) {
// We consider the value to be immutable (likely the internals of a ByteString). Just
// wrap it in a Netty buffer and add it to the output buffer.
totalDoneBytes += length;
buffers.addFirst(AllocatedBuffer.wrap(value, offset, length));
// Advance the writer to the next buffer.
// TODO(nathanmittler): Consider slicing if space available above some threshold.
nextBuffer();
return;
}
pos -= length;
System.arraycopy(value, offset, buffer, arrayPos() + 1, length);
}
@Override
public void write(ByteBuffer value) {
int length = value.remaining();
requireSpace(length);
pos -= length;
value.get(buffer, arrayPos() + 1, length);
}
@Override
public void writeLazy(ByteBuffer value) {
int length = value.remaining();
if (spaceLeft() < length) {
// We consider the value to be immutable (likely the internals of a ByteString). Just
// wrap it in a Netty buffer and add it to the output buffer.
totalDoneBytes += length;
buffers.addFirst(AllocatedBuffer.wrap(value));
// Advance the writer to the next buffer.
// TODO(nathanmittler): Consider slicing if space available above some threshold.
nextBuffer();
}
pos -= length;
value.get(buffer, arrayPos() + 1, length);
}
@Override
void requireSpace(int size) {
if (spaceLeft() < size) {
nextBuffer(size);
}
}
}
/** Writer that uses safe operations on a target {@link ByteBuffer}. */
private static final class SafeDirectWriter extends BinaryWriter {
private ByteBuffer buffer;
private int limitMinusOne;
private int pos;
SafeDirectWriter(BufferAllocator alloc, int chunkSize) {
super(alloc, chunkSize);
nextBuffer();
}
private void nextBuffer() {
nextBuffer(newDirectBuffer());
}
private void nextBuffer(int capacity) {
nextBuffer(newDirectBuffer(capacity));
}
private void nextBuffer(AllocatedBuffer allocatedBuffer) {
if (!allocatedBuffer.hasNioBuffer()) {
throw new RuntimeException("Allocated buffer does not have NIO buffer");
}
ByteBuffer nioBuffer = allocatedBuffer.nioBuffer();
if (!nioBuffer.isDirect()) {
throw new RuntimeException("Allocator returned non-direct buffer");
}
finishCurrentBuffer();
buffers.addFirst(allocatedBuffer);
buffer = nioBuffer;
buffer.limit(buffer.capacity());
buffer.position(0);
// Set byte order to little endian for fast writing of fixed 32/64.
buffer.order(ByteOrder.LITTLE_ENDIAN);
limitMinusOne = buffer.limit() - 1;
pos = limitMinusOne;
}
@Override
public int getTotalBytesWritten() {
return totalDoneBytes + bytesWrittenToCurrentBuffer();
}
private int bytesWrittenToCurrentBuffer() {
return limitMinusOne - pos;
}
private int spaceLeft() {
return pos + 1;
}
@Override
void finishCurrentBuffer() {
if (buffer != null) {
totalDoneBytes += bytesWrittenToCurrentBuffer();
// Update the indices on the netty buffer.
buffer.position(pos + 1);
buffer = null;
pos = 0;
limitMinusOne = 0;
}
}
@Override
public void writeUInt32(int fieldNumber, int value) {
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeInt32(int fieldNumber, int value) {
requireSpace(MAX_VARINT32_SIZE + MAX_VARINT64_SIZE);
writeInt32(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeSInt32(int fieldNumber, int value) {
requireSpace(MAX_VARINT32_SIZE * 2);
writeSInt32(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeFixed32(int fieldNumber, int value) {
requireSpace(MAX_VARINT32_SIZE + FIXED32_SIZE);
writeFixed32(value);
writeTag(fieldNumber, WIRETYPE_FIXED32);
}
@Override
public void writeUInt64(int fieldNumber, long value) {
requireSpace(MAX_VARINT32_SIZE + MAX_VARINT64_SIZE);
writeVarint64(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeSInt64(int fieldNumber, long value) {
requireSpace(MAX_VARINT32_SIZE + MAX_VARINT64_SIZE);
writeSInt64(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeFixed64(int fieldNumber, long value) {
requireSpace(MAX_VARINT32_SIZE + FIXED64_SIZE);
writeFixed64(value);
writeTag(fieldNumber, WIRETYPE_FIXED64);
}
@Override
public void writeBool(int fieldNumber, boolean value) {
requireSpace(MAX_VARINT32_SIZE + 1);
write((byte) (value ? 1 : 0));
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeString(int fieldNumber, String value) {
int prevBytes = getTotalBytesWritten();
writeString(value);
int length = getTotalBytesWritten() - prevBytes;
requireSpace(2 * MAX_VARINT32_SIZE);
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeBytes(int fieldNumber, ByteString value) {
try {
value.writeToReverse(this);
} catch (IOException e) {
// Should never happen since the writer does not throw.
throw new RuntimeException(e);
}
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(value.size());
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeMessage(int fieldNumber, Object value) throws IOException {
int prevBytes = getTotalBytesWritten();
Protobuf.getInstance().writeTo(value, this);
int length = getTotalBytesWritten() - prevBytes;
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeMessage(int fieldNumber, Object value, Schema schema) throws IOException {
int prevBytes = getTotalBytesWritten();
schema.writeTo(value, this);
int length = getTotalBytesWritten() - prevBytes;
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeGroup(int fieldNumber, Object value) throws IOException {
writeTag(fieldNumber, WIRETYPE_END_GROUP);
Protobuf.getInstance().writeTo(value, this);
writeTag(fieldNumber, WIRETYPE_START_GROUP);
}
@Override
public void writeGroup(int fieldNumber, Object value, Schema schema) throws IOException {
writeTag(fieldNumber, WIRETYPE_END_GROUP);
schema.writeTo(value, this);
writeTag(fieldNumber, WIRETYPE_START_GROUP);
}
@Override
public void writeStartGroup(int fieldNumber) {
writeTag(fieldNumber, WIRETYPE_START_GROUP);
}
@Override
public void writeEndGroup(int fieldNumber) {
writeTag(fieldNumber, WIRETYPE_END_GROUP);
}
@Override
void writeInt32(int value) {
if (value >= 0) {
writeVarint32(value);
} else {
writeVarint64(value);
}
}
@Override
void writeSInt32(int value) {
writeVarint32(CodedOutputStream.encodeZigZag32(value));
}
@Override
void writeSInt64(long value) {
writeVarint64(CodedOutputStream.encodeZigZag64(value));
}
@Override
void writeBool(boolean value) {
write((byte) (value ? 1 : 0));
}
@Override
void writeTag(int fieldNumber, int wireType) {
writeVarint32(WireFormat.makeTag(fieldNumber, wireType));
}
@Override
void writeVarint32(int value) {
if ((value & (~0 << 7)) == 0) {
writeVarint32OneByte(value);
} else if ((value & (~0 << 14)) == 0) {
writeVarint32TwoBytes(value);
} else if ((value & (~0 << 21)) == 0) {
writeVarint32ThreeBytes(value);
} else if ((value & (~0 << 28)) == 0) {
writeVarint32FourBytes(value);
} else {
writeVarint32FiveBytes(value);
}
}
private void writeVarint32OneByte(int value) {
buffer.put(pos--, (byte) value);
}
private void writeVarint32TwoBytes(int value) {
// Byte order is little-endian.
pos -= 2;
buffer.putShort(pos + 1, (short) (((value & (0x7F << 7)) << 1) | ((value & 0x7F) | 0x80)));
}
private void writeVarint32ThreeBytes(int value) {
// Byte order is little-endian.
pos -= 3;
buffer.putInt(
pos,
((value & (0x7F << 14)) << 10)
| (((value & (0x7F << 7)) | (0x80 << 7)) << 9)
| ((value & 0x7F) | 0x80) << 8);
}
private void writeVarint32FourBytes(int value) {
// Byte order is little-endian.
pos -= 4;
buffer.putInt(
pos + 1,
((value & (0x7F << 21)) << 3)
| (((value & (0x7F << 14)) | (0x80 << 14)) << 2)
| (((value & (0x7F << 7)) | (0x80 << 7)) << 1)
| ((value & 0x7F) | 0x80));
}
private void writeVarint32FiveBytes(int value) {
// Byte order is little-endian.
buffer.put(pos--, (byte) (value >>> 28));
pos -= 4;
buffer.putInt(
pos + 1,
((((value >>> 21) & 0x7F) | 0x80) << 24)
| ((((value >>> 14) & 0x7F) | 0x80) << 16)
| ((((value >>> 7) & 0x7F) | 0x80) << 8)
| ((value & 0x7F) | 0x80));
}
@Override
void writeVarint64(long value) {
switch (computeUInt64SizeNoTag(value)) {
case 1:
writeVarint64OneByte(value);
break;
case 2:
writeVarint64TwoBytes(value);
break;
case 3:
writeVarint64ThreeBytes(value);
break;
case 4:
writeVarint64FourBytes(value);
break;
case 5:
writeVarint64FiveBytes(value);
break;
case 6:
writeVarint64SixBytes(value);
break;
case 7:
writeVarint64SevenBytes(value);
break;
case 8:
writeVarint64EightBytes(value);
break;
case 9:
writeVarint64NineBytes(value);
break;
case 10:
writeVarint64TenBytes(value);
break;
}
}
private void writeVarint64OneByte(long value) {
writeVarint32OneByte((int) value);
}
private void writeVarint64TwoBytes(long value) {
writeVarint32TwoBytes((int) value);
}
private void writeVarint64ThreeBytes(long value) {
writeVarint32ThreeBytes((int) value);
}
private void writeVarint64FourBytes(long value) {
writeVarint32FourBytes((int) value);
}
private void writeVarint64FiveBytes(long value) {
// Byte order is little-endian.
pos -= 5;
buffer.putLong(
pos - 2,
((value & (0x7FL << 28)) << 28)
| (((value & (0x7F << 21)) | (0x80 << 21)) << 27)
| (((value & (0x7F << 14)) | (0x80 << 14)) << 26)
| (((value & (0x7F << 7)) | (0x80 << 7)) << 25)
| (((value & 0x7F) | 0x80)) << 24);
}
private void writeVarint64SixBytes(long value) {
// Byte order is little-endian.
pos -= 6;
buffer.putLong(
pos - 1,
((value & (0x7FL << 35)) << 21)
| (((value & (0x7FL << 28)) | (0x80L << 28)) << 20)
| (((value & (0x7F << 21)) | (0x80 << 21)) << 19)
| (((value & (0x7F << 14)) | (0x80 << 14)) << 18)
| (((value & (0x7F << 7)) | (0x80 << 7)) << 17)
| (((value & 0x7F) | 0x80)) << 16);
}
private void writeVarint64SevenBytes(long value) {
// Byte order is little-endian.
pos -= 7;
buffer.putLong(
pos,
((value & (0x7FL << 42)) << 14)
| (((value & (0x7FL << 35)) | (0x80L << 35)) << 13)
| (((value & (0x7FL << 28)) | (0x80L << 28)) << 12)
| (((value & (0x7F << 21)) | (0x80 << 21)) << 11)
| (((value & (0x7F << 14)) | (0x80 << 14)) << 10)
| (((value & (0x7F << 7)) | (0x80 << 7)) << 9)
| (((value & 0x7F) | 0x80)) << 8);
}
private void writeVarint64EightBytes(long value) {
// Byte order is little-endian.
pos -= 8;
buffer.putLong(
pos + 1,
((value & (0x7FL << 49)) << 7)
| (((value & (0x7FL << 42)) | (0x80L << 42)) << 6)
| (((value & (0x7FL << 35)) | (0x80L << 35)) << 5)
| (((value & (0x7FL << 28)) | (0x80L << 28)) << 4)
| (((value & (0x7F << 21)) | (0x80 << 21)) << 3)
| (((value & (0x7F << 14)) | (0x80 << 14)) << 2)
| (((value & (0x7F << 7)) | (0x80 << 7)) << 1)
| ((value & 0x7F) | 0x80));
}
private void writeVarint64EightBytesWithSign(long value) {
// Byte order is little-endian.
pos -= 8;
buffer.putLong(
pos + 1,
(((value & (0x7FL << 49)) | (0x80L << 49)) << 7)
| (((value & (0x7FL << 42)) | (0x80L << 42)) << 6)
| (((value & (0x7FL << 35)) | (0x80L << 35)) << 5)
| (((value & (0x7FL << 28)) | (0x80L << 28)) << 4)
| (((value & (0x7F << 21)) | (0x80 << 21)) << 3)
| (((value & (0x7F << 14)) | (0x80 << 14)) << 2)
| (((value & (0x7F << 7)) | (0x80 << 7)) << 1)
| ((value & 0x7F) | 0x80));
}
private void writeVarint64NineBytes(long value) {
buffer.put(pos--, (byte) (value >>> 56));
writeVarint64EightBytesWithSign(value & 0xFFFFFFFFFFFFFFL);
}
private void writeVarint64TenBytes(long value) {
buffer.put(pos--, (byte) (value >>> 63));
buffer.put(pos--, (byte) (((value >>> 56) & 0x7F) | 0x80));
writeVarint64EightBytesWithSign(value & 0xFFFFFFFFFFFFFFL);
}
@Override
void writeFixed32(int value) {
pos -= 4;
buffer.putInt(pos + 1, value);
}
@Override
void writeFixed64(long value) {
pos -= 8;
buffer.putLong(pos + 1, value);
}
@Override
void writeString(String in) {
// Request enough space to write the ASCII string.
requireSpace(in.length());
// We know the buffer is big enough...
int i = in.length() - 1;
pos -= i;
// Designed to take advantage of
// https://wiki.openjdk.java.net/display/HotSpotInternals/RangeCheckElimination
for (char c; i >= 0 && (c = in.charAt(i)) < 0x80; i--) {
buffer.put(pos + i, (byte) c);
}
if (i == -1) {
// Move the position past the ASCII string.
pos -= 1;
return;
}
pos += i;
for (char c; i >= 0; i--) {
c = in.charAt(i);
if (c < 0x80 && pos >= 0) {
buffer.put(pos--, (byte) c);
} else if (c < 0x800 && pos > 0) { // 11 bits, two UTF-8 bytes
buffer.put(pos--, (byte) (0x80 | (0x3F & c)));
buffer.put(pos--, (byte) ((0xF << 6) | (c >>> 6)));
} else if ((c < Character.MIN_SURROGATE || Character.MAX_SURROGATE < c) && pos > 1) {
// Maximum single-char code point is 0xFFFF, 16 bits, three UTF-8 bytes
buffer.put(pos--, (byte) (0x80 | (0x3F & c)));
buffer.put(pos--, (byte) (0x80 | (0x3F & (c >>> 6))));
buffer.put(pos--, (byte) ((0xF << 5) | (c >>> 12)));
} else if (pos > 2) {
// Minimum code point represented by a surrogate pair is 0x10000, 17 bits,
// four UTF-8 bytes
char high = 0;
if (i == 0 || !Character.isSurrogatePair(high = in.charAt(i - 1), c)) {
throw new Utf8.UnpairedSurrogateException(i - 1, i);
}
i--;
int codePoint = Character.toCodePoint(high, c);
buffer.put(pos--, (byte) (0x80 | (0x3F & codePoint)));
buffer.put(pos--, (byte) (0x80 | (0x3F & (codePoint >>> 6))));
buffer.put(pos--, (byte) (0x80 | (0x3F & (codePoint >>> 12))));
buffer.put(pos--, (byte) ((0xF << 4) | (codePoint >>> 18)));
} else {
// Buffer is full - allocate a new one and revisit the current character.
requireSpace(i);
i++;
}
}
}
@Override
public void write(byte value) {
buffer.put(pos--, value);
}
@Override
public void write(byte[] value, int offset, int length) {
if (spaceLeft() < length) {
nextBuffer(length);
}
pos -= length;
buffer.position(pos + 1);
buffer.put(value, offset, length);
}
@Override
public void writeLazy(byte[] value, int offset, int length) {
if (spaceLeft() < length) {
// We consider the value to be immutable (likely the internals of a ByteString). Just
// wrap it in a Netty buffer and add it to the output buffer.
totalDoneBytes += length;
buffers.addFirst(AllocatedBuffer.wrap(value, offset, length));
// Advance the writer to the next buffer.
// TODO(nathanmittler): Consider slicing if space available above some threshold.
nextBuffer();
return;
}
pos -= length;
buffer.position(pos + 1);
buffer.put(value, offset, length);
}
@Override
public void write(ByteBuffer value) {
int length = value.remaining();
if (spaceLeft() < length) {
nextBuffer(length);
}
pos -= length;
buffer.position(pos + 1);
buffer.put(value);
}
@Override
public void writeLazy(ByteBuffer value) {
int length = value.remaining();
if (spaceLeft() < length) {
// We consider the value to be immutable (likely the internals of a ByteString). Just
// wrap it in a Netty buffer and add it to the output buffer.
totalDoneBytes += length;
buffers.addFirst(AllocatedBuffer.wrap(value));
// Advance the writer to the next buffer.
// TODO(nathanmittler): Consider slicing if space available above some threshold.
nextBuffer();
return;
}
pos -= length;
buffer.position(pos + 1);
buffer.put(value);
}
@Override
void requireSpace(int size) {
if (spaceLeft() < size) {
nextBuffer(size);
}
}
}
/** Writer that uses unsafe operations on a target {@link ByteBuffer}. */
private static final class UnsafeDirectWriter extends BinaryWriter {
private ByteBuffer buffer;
private long bufferOffset;
private long limitMinusOne;
private long pos;
UnsafeDirectWriter(BufferAllocator alloc, int chunkSize) {
super(alloc, chunkSize);
nextBuffer();
}
/** Indicates whether the required unsafe operations are supported on this platform. */
private static boolean isSupported() {
return UnsafeUtil.hasUnsafeByteBufferOperations();
}
private void nextBuffer() {
nextBuffer(newDirectBuffer());
}
private void nextBuffer(int capacity) {
nextBuffer(newDirectBuffer(capacity));
}
private void nextBuffer(AllocatedBuffer allocatedBuffer) {
if (!allocatedBuffer.hasNioBuffer()) {
throw new RuntimeException("Allocated buffer does not have NIO buffer");
}
ByteBuffer nioBuffer = allocatedBuffer.nioBuffer();
if (!nioBuffer.isDirect()) {
throw new RuntimeException("Allocator returned non-direct buffer");
}
finishCurrentBuffer();
buffers.addFirst(allocatedBuffer);
buffer = nioBuffer;
buffer.limit(buffer.capacity());
buffer.position(0);
bufferOffset = UnsafeUtil.addressOffset(buffer);
limitMinusOne = bufferOffset + (buffer.limit() - 1);
pos = limitMinusOne;
}
@Override
public int getTotalBytesWritten() {
return totalDoneBytes + bytesWrittenToCurrentBuffer();
}
private int bytesWrittenToCurrentBuffer() {
return (int) (limitMinusOne - pos);
}
private int spaceLeft() {
return bufferPos() + 1;
}
@Override
void finishCurrentBuffer() {
if (buffer != null) {
totalDoneBytes += bytesWrittenToCurrentBuffer();
// Update the indices on the netty buffer.
buffer.position(bufferPos() + 1);
buffer = null;
pos = 0;
limitMinusOne = 0;
}
}
private int bufferPos() {
return (int) (pos - bufferOffset);
}
@Override
public void writeUInt32(int fieldNumber, int value) {
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeInt32(int fieldNumber, int value) {
requireSpace(MAX_VARINT32_SIZE + MAX_VARINT64_SIZE);
writeInt32(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeSInt32(int fieldNumber, int value) {
requireSpace(MAX_VARINT32_SIZE * 2);
writeSInt32(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeFixed32(int fieldNumber, int value) {
requireSpace(MAX_VARINT32_SIZE + FIXED32_SIZE);
writeFixed32(value);
writeTag(fieldNumber, WIRETYPE_FIXED32);
}
@Override
public void writeUInt64(int fieldNumber, long value) {
requireSpace(MAX_VARINT32_SIZE + MAX_VARINT64_SIZE);
writeVarint64(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeSInt64(int fieldNumber, long value) {
requireSpace(MAX_VARINT32_SIZE + MAX_VARINT64_SIZE);
writeSInt64(value);
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeFixed64(int fieldNumber, long value) {
requireSpace(MAX_VARINT32_SIZE + FIXED64_SIZE);
writeFixed64(value);
writeTag(fieldNumber, WIRETYPE_FIXED64);
}
@Override
public void writeBool(int fieldNumber, boolean value) {
requireSpace(MAX_VARINT32_SIZE + 1);
write((byte) (value ? 1 : 0));
writeTag(fieldNumber, WIRETYPE_VARINT);
}
@Override
public void writeString(int fieldNumber, String value) {
int prevBytes = getTotalBytesWritten();
writeString(value);
int length = getTotalBytesWritten() - prevBytes;
requireSpace(2 * MAX_VARINT32_SIZE);
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeBytes(int fieldNumber, ByteString value) {
try {
value.writeToReverse(this);
} catch (IOException e) {
// Should never happen since the writer does not throw.
throw new RuntimeException(e);
}
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(value.size());
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeMessage(int fieldNumber, Object value) throws IOException {
int prevBytes = getTotalBytesWritten();
Protobuf.getInstance().writeTo(value, this);
int length = getTotalBytesWritten() - prevBytes;
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeMessage(int fieldNumber, Object value, Schema schema) throws IOException {
int prevBytes = getTotalBytesWritten();
schema.writeTo(value, this);
int length = getTotalBytesWritten() - prevBytes;
requireSpace(MAX_VARINT32_SIZE * 2);
writeVarint32(length);
writeTag(fieldNumber, WIRETYPE_LENGTH_DELIMITED);
}
@Override
public void writeGroup(int fieldNumber, Object value) throws IOException {
writeTag(fieldNumber, WIRETYPE_END_GROUP);
Protobuf.getInstance().writeTo(value, this);
writeTag(fieldNumber, WIRETYPE_START_GROUP);
}
@Override
public void writeGroup(int fieldNumber, Object value, Schema schema) throws IOException {
writeTag(fieldNumber, WIRETYPE_END_GROUP);
schema.writeTo(value, this);
writeTag(fieldNumber, WIRETYPE_START_GROUP);
}
@Override
public void writeStartGroup(int fieldNumber) {
writeTag(fieldNumber, WIRETYPE_START_GROUP);
}
@Override
public void writeEndGroup(int fieldNumber) {
writeTag(fieldNumber, WIRETYPE_END_GROUP);
}
@Override
void writeInt32(int value) {
if (value >= 0) {
writeVarint32(value);
} else {
writeVarint64(value);
}
}
@Override
void writeSInt32(int value) {
writeVarint32(CodedOutputStream.encodeZigZag32(value));
}
@Override
void writeSInt64(long value) {
writeVarint64(CodedOutputStream.encodeZigZag64(value));
}
@Override
void writeBool(boolean value) {
write((byte) (value ? 1 : 0));
}
@Override
void writeTag(int fieldNumber, int wireType) {
writeVarint32(WireFormat.makeTag(fieldNumber, wireType));
}
@Override
void writeVarint32(int value) {
if ((value & (~0 << 7)) == 0) {
writeVarint32OneByte(value);
} else if ((value & (~0 << 14)) == 0) {
writeVarint32TwoBytes(value);
} else if ((value & (~0 << 21)) == 0) {
writeVarint32ThreeBytes(value);
} else if ((value & (~0 << 28)) == 0) {
writeVarint32FourBytes(value);
} else {
writeVarint32FiveBytes(value);
}
}
private void writeVarint32OneByte(int value) {
UnsafeUtil.putByte(pos--, (byte) value);
}
private void writeVarint32TwoBytes(int value) {
UnsafeUtil.putByte(pos--, (byte) (value >>> 7));
UnsafeUtil.putByte(pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint32ThreeBytes(int value) {
UnsafeUtil.putByte(pos--, (byte) (value >>> 14));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint32FourBytes(int value) {
UnsafeUtil.putByte(pos--, (byte) (value >>> 21));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint32FiveBytes(int value) {
UnsafeUtil.putByte(pos--, (byte) (value >>> 28));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) ((value & 0x7F) | 0x80));
}
@Override
void writeVarint64(long value) {
switch (computeUInt64SizeNoTag(value)) {
case 1:
writeVarint64OneByte(value);
break;
case 2:
writeVarint64TwoBytes(value);
break;
case 3:
writeVarint64ThreeBytes(value);
break;
case 4:
writeVarint64FourBytes(value);
break;
case 5:
writeVarint64FiveBytes(value);
break;
case 6:
writeVarint64SixBytes(value);
break;
case 7:
writeVarint64SevenBytes(value);
break;
case 8:
writeVarint64EightBytes(value);
break;
case 9:
writeVarint64NineBytes(value);
break;
case 10:
writeVarint64TenBytes(value);
break;
}
}
private void writeVarint64OneByte(long value) {
UnsafeUtil.putByte(pos--, (byte) value);
}
private void writeVarint64TwoBytes(long value) {
UnsafeUtil.putByte(pos--, (byte) (value >>> 7));
UnsafeUtil.putByte(pos--, (byte) (((int) value & 0x7F) | 0x80));
}
private void writeVarint64ThreeBytes(long value) {
UnsafeUtil.putByte(pos--, (byte) (((int) value) >>> 14));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64FourBytes(long value) {
UnsafeUtil.putByte(pos--, (byte) (value >>> 21));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64FiveBytes(long value) {
UnsafeUtil.putByte(pos--, (byte) (value >>> 28));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64SixBytes(long value) {
UnsafeUtil.putByte(pos--, (byte) (value >>> 35));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 28) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64SevenBytes(long value) {
UnsafeUtil.putByte(pos--, (byte) (value >>> 42));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 35) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 28) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64EightBytes(long value) {
UnsafeUtil.putByte(pos--, (byte) (value >>> 49));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 42) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 35) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 28) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64NineBytes(long value) {
UnsafeUtil.putByte(pos--, (byte) (value >>> 56));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 49) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 42) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 35) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 28) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) ((value & 0x7F) | 0x80));
}
private void writeVarint64TenBytes(long value) {
UnsafeUtil.putByte(pos--, (byte) (value >>> 63));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 56) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 49) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 42) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 35) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 28) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 21) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 14) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) (((value >>> 7) & 0x7F) | 0x80));
UnsafeUtil.putByte(pos--, (byte) ((value & 0x7F) | 0x80));
}
@Override
void writeFixed32(int value) {
UnsafeUtil.putByte(pos--, (byte) ((value >> 24) & 0xFF));
UnsafeUtil.putByte(pos--, (byte) ((value >> 16) & 0xFF));
UnsafeUtil.putByte(pos--, (byte) ((value >> 8) & 0xFF));
UnsafeUtil.putByte(pos--, (byte) (value & 0xFF));
}
@Override
void writeFixed64(long value) {
UnsafeUtil.putByte(pos--, (byte) ((int) (value >> 56) & 0xFF));
UnsafeUtil.putByte(pos--, (byte) ((int) (value >> 48) & 0xFF));
UnsafeUtil.putByte(pos--, (byte) ((int) (value >> 40) & 0xFF));
UnsafeUtil.putByte(pos--, (byte) ((int) (value >> 32) & 0xFF));
UnsafeUtil.putByte(pos--, (byte) ((int) (value >> 24) & 0xFF));
UnsafeUtil.putByte(pos--, (byte) ((int) (value >> 16) & 0xFF));
UnsafeUtil.putByte(pos--, (byte) ((int) (value >> 8) & 0xFF));
UnsafeUtil.putByte(pos--, (byte) ((int) (value) & 0xFF));
}
@Override
void writeString(String in) {
// Request enough space to write the ASCII string.
requireSpace(in.length());
// We know the buffer is big enough...
int i = in.length() - 1;
// Designed to take advantage of
// https://wiki.openjdk.java.net/display/HotSpotInternals/RangeCheckElimination
for (char c; i >= 0 && (c = in.charAt(i)) < 0x80; i--) {
UnsafeUtil.putByte(pos--, (byte) c);
}
if (i == -1) {
// ASCII.
return;
}
for (char c; i >= 0; i--) {
c = in.charAt(i);
if (c < 0x80 && pos >= bufferOffset) {
UnsafeUtil.putByte(pos--, (byte) c);
} else if (c < 0x800 && pos > bufferOffset) { // 11 bits, two UTF-8 bytes
UnsafeUtil.putByte(pos--, (byte) (0x80 | (0x3F & c)));
UnsafeUtil.putByte(pos--, (byte) ((0xF << 6) | (c >>> 6)));
} else if ((c < Character.MIN_SURROGATE || Character.MAX_SURROGATE < c)
&& pos > bufferOffset + 1) {
// Maximum single-char code point is 0xFFFF, 16 bits, three UTF-8 bytes
UnsafeUtil.putByte(pos--, (byte) (0x80 | (0x3F & c)));
UnsafeUtil.putByte(pos--, (byte) (0x80 | (0x3F & (c >>> 6))));
UnsafeUtil.putByte(pos--, (byte) ((0xF << 5) | (c >>> 12)));
} else if (pos > bufferOffset + 2) {
// Minimum code point represented by a surrogate pair is 0x10000, 17 bits,
// four UTF-8 bytes
final char high;
if (i == 0 || !Character.isSurrogatePair(high = in.charAt(i - 1), c)) {
throw new Utf8.UnpairedSurrogateException(i - 1, i);
}
i--;
int codePoint = Character.toCodePoint(high, c);
UnsafeUtil.putByte(pos--, (byte) (0x80 | (0x3F & codePoint)));
UnsafeUtil.putByte(pos--, (byte) (0x80 | (0x3F & (codePoint >>> 6))));
UnsafeUtil.putByte(pos--, (byte) (0x80 | (0x3F & (codePoint >>> 12))));
UnsafeUtil.putByte(pos--, (byte) ((0xF << 4) | (codePoint >>> 18)));
} else {
// Buffer is full - allocate a new one and revisit the current character.
requireSpace(i);
i++;
}
}
}
@Override
public void write(byte value) {
UnsafeUtil.putByte(pos--, value);
}
@Override
public void write(byte[] value, int offset, int length) {
if (spaceLeft() < length) {
nextBuffer(length);
}
pos -= length;
buffer.position(bufferPos() + 1);
buffer.put(value, offset, length);
}
@Override
public void writeLazy(byte[] value, int offset, int length) {
if (spaceLeft() < length) {
// We consider the value to be immutable (likely the internals of a ByteString). Just
// wrap it in a Netty buffer and add it to the output buffer.
totalDoneBytes += length;
buffers.addFirst(AllocatedBuffer.wrap(value, offset, length));
// Advance the writer to the next buffer.
// TODO(nathanmittler): Consider slicing if space available above some threshold.
nextBuffer();
return;
}
pos -= length;
buffer.position(bufferPos() + 1);
buffer.put(value, offset, length);
}
@Override
public void write(ByteBuffer value) {
int length = value.remaining();
if (spaceLeft() < length) {
nextBuffer(length);
}
pos -= length;
buffer.position(bufferPos() + 1);
buffer.put(value);
}
@Override
public void writeLazy(ByteBuffer value) {
int length = value.remaining();
if (spaceLeft() < length) {
// We consider the value to be immutable (likely the internals of a ByteString). Just
// wrap it in a Netty buffer and add it to the output buffer.
totalDoneBytes += length;
buffers.addFirst(AllocatedBuffer.wrap(value));
// Advance the writer to the next buffer.
// TODO(nathanmittler): Consider slicing if space available above some threshold.
nextBuffer();
return;
}
pos -= length;
buffer.position(bufferPos() + 1);
buffer.put(value);
}
@Override
void requireSpace(int size) {
if (spaceLeft() < size) {
nextBuffer(size);
}
}
}
}