Index: third_party/protobuf/java/src/main/java/com/google/protobuf/CodedInputStream.java |
diff --git a/third_party/protobuf/java/src/main/java/com/google/protobuf/CodedInputStream.java b/third_party/protobuf/java/src/main/java/com/google/protobuf/CodedInputStream.java |
deleted file mode 100644 |
index adc915369a40a0be258dd88f0a1fa4770e588955..0000000000000000000000000000000000000000 |
--- a/third_party/protobuf/java/src/main/java/com/google/protobuf/CodedInputStream.java |
+++ /dev/null |
@@ -1,1308 +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.io.ByteArrayOutputStream; |
-import java.io.IOException; |
-import java.io.InputStream; |
-import java.nio.ByteBuffer; |
-import java.util.ArrayList; |
-import java.util.Arrays; |
-import java.util.List; |
- |
-/** |
- * Reads and decodes protocol message fields. |
- * |
- * This class contains two kinds of methods: methods that read specific |
- * protocol message constructs and field types (e.g. {@link #readTag()} and |
- * {@link #readInt32()}) and methods that read low-level values (e.g. |
- * {@link #readRawVarint32()} and {@link #readRawBytes}). If you are reading |
- * encoded protocol messages, you should use the former methods, but if you are |
- * reading some other format of your own design, use the latter. |
- * |
- * @author kenton@google.com Kenton Varda |
- */ |
-public final class CodedInputStream { |
- /** |
- * Create a new CodedInputStream wrapping the given InputStream. |
- */ |
- public static CodedInputStream newInstance(final InputStream input) { |
- return new CodedInputStream(input); |
- } |
- |
- /** |
- * Create a new CodedInputStream wrapping the given byte array. |
- */ |
- public static CodedInputStream newInstance(final byte[] buf) { |
- return newInstance(buf, 0, buf.length); |
- } |
- |
- /** |
- * Create a new CodedInputStream wrapping the given byte array slice. |
- */ |
- public static CodedInputStream newInstance(final byte[] buf, final int off, |
- final int len) { |
- CodedInputStream result = new CodedInputStream(buf, off, len); |
- try { |
- // Some uses of CodedInputStream can be more efficient if they know |
- // exactly how many bytes are available. By pushing the end point of the |
- // buffer as a limit, we allow them to get this information via |
- // getBytesUntilLimit(). Pushing a limit that we know is at the end of |
- // the stream can never hurt, since we can never past that point anyway. |
- result.pushLimit(len); |
- } catch (InvalidProtocolBufferException ex) { |
- // The only reason pushLimit() might throw an exception here is if len |
- // is negative. Normally pushLimit()'s parameter comes directly off the |
- // wire, so it's important to catch exceptions in case of corrupt or |
- // malicious data. However, in this case, we expect that len is not a |
- // user-supplied value, so we can assume that it being negative indicates |
- // a programming error. Therefore, throwing an unchecked exception is |
- // appropriate. |
- throw new IllegalArgumentException(ex); |
- } |
- return result; |
- } |
- |
- /** |
- * Create a new CodedInputStream wrapping the given ByteBuffer. The data |
- * starting from the ByteBuffer's current position to its limit will be read. |
- * The returned CodedInputStream may or may not share the underlying data |
- * in the ByteBuffer, therefore the ByteBuffer cannot be changed while the |
- * CodedInputStream is in use. |
- * Note that the ByteBuffer's position won't be changed by this function. |
- * Concurrent calls with the same ByteBuffer object are safe if no other |
- * thread is trying to alter the ByteBuffer's status. |
- */ |
- public static CodedInputStream newInstance(ByteBuffer buf) { |
- if (buf.hasArray()) { |
- return newInstance(buf.array(), buf.arrayOffset() + buf.position(), |
- buf.remaining()); |
- } else { |
- ByteBuffer temp = buf.duplicate(); |
- byte[] buffer = new byte[temp.remaining()]; |
- temp.get(buffer); |
- return newInstance(buffer); |
- } |
- } |
- |
- /** |
- * Create a new CodedInputStream wrapping a LiteralByteString. |
- */ |
- static CodedInputStream newInstance(LiteralByteString byteString) { |
- CodedInputStream result = new CodedInputStream(byteString); |
- try { |
- // Some uses of CodedInputStream can be more efficient if they know |
- // exactly how many bytes are available. By pushing the end point of the |
- // buffer as a limit, we allow them to get this information via |
- // getBytesUntilLimit(). Pushing a limit that we know is at the end of |
- // the stream can never hurt, since we can never past that point anyway. |
- result.pushLimit(byteString.size()); |
- } catch (InvalidProtocolBufferException ex) { |
- // The only reason pushLimit() might throw an exception here is if len |
- // is negative. Normally pushLimit()'s parameter comes directly off the |
- // wire, so it's important to catch exceptions in case of corrupt or |
- // malicious data. However, in this case, we expect that len is not a |
- // user-supplied value, so we can assume that it being negative indicates |
- // a programming error. Therefore, throwing an unchecked exception is |
- // appropriate. |
- throw new IllegalArgumentException(ex); |
- } |
- return result; |
- } |
- |
- // ----------------------------------------------------------------- |
- |
- /** |
- * Attempt to read a field tag, returning zero if we have reached EOF. |
- * Protocol message parsers use this to read tags, since a protocol message |
- * may legally end wherever a tag occurs, and zero is not a valid tag number. |
- */ |
- public int readTag() throws IOException { |
- if (isAtEnd()) { |
- lastTag = 0; |
- return 0; |
- } |
- |
- lastTag = readRawVarint32(); |
- if (WireFormat.getTagFieldNumber(lastTag) == 0) { |
- // If we actually read zero (or any tag number corresponding to field |
- // number zero), that's not a valid tag. |
- throw InvalidProtocolBufferException.invalidTag(); |
- } |
- return lastTag; |
- } |
- |
- /** |
- * Verifies that the last call to readTag() returned the given tag value. |
- * This is used to verify that a nested group ended with the correct |
- * end tag. |
- * |
- * @throws InvalidProtocolBufferException {@code value} does not match the |
- * last tag. |
- */ |
- public void checkLastTagWas(final int value) |
- throws InvalidProtocolBufferException { |
- if (lastTag != value) { |
- throw InvalidProtocolBufferException.invalidEndTag(); |
- } |
- } |
- |
- public int getLastTag() { |
- return lastTag; |
- } |
- |
- /** |
- * Reads and discards a single field, given its tag value. |
- * |
- * @return {@code false} if the tag is an endgroup tag, in which case |
- * nothing is skipped. Otherwise, returns {@code true}. |
- */ |
- public boolean skipField(final int tag) throws IOException { |
- switch (WireFormat.getTagWireType(tag)) { |
- case WireFormat.WIRETYPE_VARINT: |
- skipRawVarint(); |
- return true; |
- case WireFormat.WIRETYPE_FIXED64: |
- skipRawBytes(8); |
- return true; |
- case WireFormat.WIRETYPE_LENGTH_DELIMITED: |
- skipRawBytes(readRawVarint32()); |
- return true; |
- case WireFormat.WIRETYPE_START_GROUP: |
- skipMessage(); |
- checkLastTagWas( |
- WireFormat.makeTag(WireFormat.getTagFieldNumber(tag), |
- WireFormat.WIRETYPE_END_GROUP)); |
- return true; |
- case WireFormat.WIRETYPE_END_GROUP: |
- return false; |
- case WireFormat.WIRETYPE_FIXED32: |
- skipRawBytes(4); |
- return true; |
- default: |
- throw InvalidProtocolBufferException.invalidWireType(); |
- } |
- } |
- |
- /** |
- * Reads a single field and writes it to output in wire format, |
- * given its tag value. |
- * |
- * @return {@code false} if the tag is an endgroup tag, in which case |
- * nothing is skipped. Otherwise, returns {@code true}. |
- */ |
- public boolean skipField(final int tag, final CodedOutputStream output) |
- throws IOException { |
- switch (WireFormat.getTagWireType(tag)) { |
- case WireFormat.WIRETYPE_VARINT: { |
- long value = readInt64(); |
- output.writeRawVarint32(tag); |
- output.writeUInt64NoTag(value); |
- return true; |
- } |
- case WireFormat.WIRETYPE_FIXED64: { |
- long value = readRawLittleEndian64(); |
- output.writeRawVarint32(tag); |
- output.writeFixed64NoTag(value); |
- return true; |
- } |
- case WireFormat.WIRETYPE_LENGTH_DELIMITED: { |
- ByteString value = readBytes(); |
- output.writeRawVarint32(tag); |
- output.writeBytesNoTag(value); |
- return true; |
- } |
- case WireFormat.WIRETYPE_START_GROUP: { |
- output.writeRawVarint32(tag); |
- skipMessage(output); |
- int endtag = WireFormat.makeTag(WireFormat.getTagFieldNumber(tag), |
- WireFormat.WIRETYPE_END_GROUP); |
- checkLastTagWas(endtag); |
- output.writeRawVarint32(endtag); |
- return true; |
- } |
- case WireFormat.WIRETYPE_END_GROUP: { |
- return false; |
- } |
- case WireFormat.WIRETYPE_FIXED32: { |
- int value = readRawLittleEndian32(); |
- output.writeRawVarint32(tag); |
- output.writeFixed32NoTag(value); |
- return true; |
- } |
- default: |
- throw InvalidProtocolBufferException.invalidWireType(); |
- } |
- } |
- |
- /** |
- * Reads and discards an entire message. This will read either until EOF |
- * or until an endgroup tag, whichever comes first. |
- */ |
- public void skipMessage() throws IOException { |
- while (true) { |
- final int tag = readTag(); |
- if (tag == 0 || !skipField(tag)) { |
- return; |
- } |
- } |
- } |
- |
- /** |
- * Reads an entire message and writes it to output in wire format. |
- * This will read either until EOF or until an endgroup tag, |
- * whichever comes first. |
- */ |
- public void skipMessage(CodedOutputStream output) throws IOException { |
- while (true) { |
- final int tag = readTag(); |
- if (tag == 0 || !skipField(tag, output)) { |
- return; |
- } |
- } |
- } |
- |
- /** |
- * Collects the bytes skipped and returns the data in a ByteBuffer. |
- */ |
- private class SkippedDataSink implements RefillCallback { |
- private int lastPos = bufferPos; |
- private ByteArrayOutputStream byteArrayStream; |
- |
- @Override |
- public void onRefill() { |
- if (byteArrayStream == null) { |
- byteArrayStream = new ByteArrayOutputStream(); |
- } |
- byteArrayStream.write(buffer, lastPos, bufferPos - lastPos); |
- lastPos = 0; |
- } |
- |
- /** |
- * Gets skipped data in a ByteBuffer. This method should only be |
- * called once. |
- */ |
- ByteBuffer getSkippedData() { |
- if (byteArrayStream == null) { |
- return ByteBuffer.wrap(buffer, lastPos, bufferPos - lastPos); |
- } else { |
- byteArrayStream.write(buffer, lastPos, bufferPos); |
- return ByteBuffer.wrap(byteArrayStream.toByteArray()); |
- } |
- } |
- } |
- |
- |
- // ----------------------------------------------------------------- |
- |
- /** Read a {@code double} field value from the stream. */ |
- public double readDouble() throws IOException { |
- return Double.longBitsToDouble(readRawLittleEndian64()); |
- } |
- |
- /** Read a {@code float} field value from the stream. */ |
- public float readFloat() throws IOException { |
- return Float.intBitsToFloat(readRawLittleEndian32()); |
- } |
- |
- /** Read a {@code uint64} field value from the stream. */ |
- public long readUInt64() throws IOException { |
- return readRawVarint64(); |
- } |
- |
- /** Read an {@code int64} field value from the stream. */ |
- public long readInt64() throws IOException { |
- return readRawVarint64(); |
- } |
- |
- /** Read an {@code int32} field value from the stream. */ |
- public int readInt32() throws IOException { |
- return readRawVarint32(); |
- } |
- |
- /** Read a {@code fixed64} field value from the stream. */ |
- public long readFixed64() throws IOException { |
- return readRawLittleEndian64(); |
- } |
- |
- /** Read a {@code fixed32} field value from the stream. */ |
- public int readFixed32() throws IOException { |
- return readRawLittleEndian32(); |
- } |
- |
- /** Read a {@code bool} field value from the stream. */ |
- public boolean readBool() throws IOException { |
- return readRawVarint64() != 0; |
- } |
- |
- /** |
- * Read a {@code string} field value from the stream. |
- * If the stream contains malformed UTF-8, |
- * replace the offending bytes with the standard UTF-8 replacement character. |
- */ |
- public String readString() throws IOException { |
- final int size = readRawVarint32(); |
- if (size <= (bufferSize - bufferPos) && size > 0) { |
- // Fast path: We already have the bytes in a contiguous buffer, so |
- // just copy directly from it. |
- final String result = new String(buffer, bufferPos, size, Internal.UTF_8); |
- bufferPos += size; |
- return result; |
- } else if (size == 0) { |
- return ""; |
- } else { |
- // Slow path: Build a byte array first then copy it. |
- return new String(readRawBytesSlowPath(size), Internal.UTF_8); |
- } |
- } |
- |
- /** |
- * Read a {@code string} field value from the stream. |
- * If the stream contains malformed UTF-8, |
- * throw exception {@link InvalidProtocolBufferException}. |
- */ |
- public String readStringRequireUtf8() throws IOException { |
- final int size = readRawVarint32(); |
- final byte[] bytes; |
- int pos = bufferPos; |
- if (size <= (bufferSize - pos) && size > 0) { |
- // Fast path: We already have the bytes in a contiguous buffer, so |
- // just copy directly from it. |
- bytes = buffer; |
- bufferPos = pos + size; |
- } else if (size == 0) { |
- return ""; |
- } else { |
- // Slow path: Build a byte array first then copy it. |
- bytes = readRawBytesSlowPath(size); |
- pos = 0; |
- } |
- // TODO(martinrb): We could save a pass by validating while decoding. |
- if (!Utf8.isValidUtf8(bytes, pos, pos + size)) { |
- throw InvalidProtocolBufferException.invalidUtf8(); |
- } |
- return new String(bytes, pos, size, Internal.UTF_8); |
- } |
- |
- /** Read a {@code group} field value from the stream. */ |
- public void readGroup(final int fieldNumber, |
- final MessageLite.Builder builder, |
- final ExtensionRegistryLite extensionRegistry) |
- throws IOException { |
- if (recursionDepth >= recursionLimit) { |
- throw InvalidProtocolBufferException.recursionLimitExceeded(); |
- } |
- ++recursionDepth; |
- builder.mergeFrom(this, extensionRegistry); |
- checkLastTagWas( |
- WireFormat.makeTag(fieldNumber, WireFormat.WIRETYPE_END_GROUP)); |
- --recursionDepth; |
- } |
- |
- |
- /** Read a {@code group} field value from the stream. */ |
- public <T extends MessageLite> T readGroup( |
- final int fieldNumber, |
- final Parser<T> parser, |
- final ExtensionRegistryLite extensionRegistry) |
- throws IOException { |
- if (recursionDepth >= recursionLimit) { |
- throw InvalidProtocolBufferException.recursionLimitExceeded(); |
- } |
- ++recursionDepth; |
- T result = parser.parsePartialFrom(this, extensionRegistry); |
- checkLastTagWas( |
- WireFormat.makeTag(fieldNumber, WireFormat.WIRETYPE_END_GROUP)); |
- --recursionDepth; |
- return result; |
- } |
- |
- /** |
- * Reads a {@code group} field value from the stream and merges it into the |
- * given {@link UnknownFieldSet}. |
- * |
- * @deprecated UnknownFieldSet.Builder now implements MessageLite.Builder, so |
- * you can just call {@link #readGroup}. |
- */ |
- @Deprecated |
- public void readUnknownGroup(final int fieldNumber, |
- final MessageLite.Builder builder) |
- throws IOException { |
- // We know that UnknownFieldSet will ignore any ExtensionRegistry so it |
- // is safe to pass null here. (We can't call |
- // ExtensionRegistry.getEmptyRegistry() because that would make this |
- // class depend on ExtensionRegistry, which is not part of the lite |
- // library.) |
- readGroup(fieldNumber, builder, null); |
- } |
- |
- /** Read an embedded message field value from the stream. */ |
- public void readMessage(final MessageLite.Builder builder, |
- final ExtensionRegistryLite extensionRegistry) |
- throws IOException { |
- final int length = readRawVarint32(); |
- if (recursionDepth >= recursionLimit) { |
- throw InvalidProtocolBufferException.recursionLimitExceeded(); |
- } |
- final int oldLimit = pushLimit(length); |
- ++recursionDepth; |
- builder.mergeFrom(this, extensionRegistry); |
- checkLastTagWas(0); |
- --recursionDepth; |
- popLimit(oldLimit); |
- } |
- |
- |
- /** Read an embedded message field value from the stream. */ |
- public <T extends MessageLite> T readMessage( |
- final Parser<T> parser, |
- final ExtensionRegistryLite extensionRegistry) |
- throws IOException { |
- int length = readRawVarint32(); |
- if (recursionDepth >= recursionLimit) { |
- throw InvalidProtocolBufferException.recursionLimitExceeded(); |
- } |
- final int oldLimit = pushLimit(length); |
- ++recursionDepth; |
- T result = parser.parsePartialFrom(this, extensionRegistry); |
- checkLastTagWas(0); |
- --recursionDepth; |
- popLimit(oldLimit); |
- return result; |
- } |
- |
- /** Read a {@code bytes} field value from the stream. */ |
- public ByteString readBytes() throws IOException { |
- final int size = readRawVarint32(); |
- if (size <= (bufferSize - bufferPos) && size > 0) { |
- // Fast path: We already have the bytes in a contiguous buffer, so |
- // just copy directly from it. |
- final ByteString result = bufferIsImmutable && enableAliasing |
- ? new BoundedByteString(buffer, bufferPos, size) |
- : ByteString.copyFrom(buffer, bufferPos, size); |
- bufferPos += size; |
- return result; |
- } else if (size == 0) { |
- return ByteString.EMPTY; |
- } else { |
- // Slow path: Build a byte array first then copy it. |
- return new LiteralByteString(readRawBytesSlowPath(size)); |
- } |
- } |
- |
- /** Read a {@code bytes} field value from the stream. */ |
- public byte[] readByteArray() throws IOException { |
- final int size = readRawVarint32(); |
- if (size <= (bufferSize - bufferPos) && size > 0) { |
- // Fast path: We already have the bytes in a contiguous buffer, so |
- // just copy directly from it. |
- final byte[] result = |
- Arrays.copyOfRange(buffer, bufferPos, bufferPos + size); |
- bufferPos += size; |
- return result; |
- } else { |
- // Slow path: Build a byte array first then copy it. |
- return readRawBytesSlowPath(size); |
- } |
- } |
- |
- /** Read a {@code bytes} field value from the stream. */ |
- public ByteBuffer readByteBuffer() throws IOException { |
- final int size = readRawVarint32(); |
- if (size <= (bufferSize - bufferPos) && size > 0) { |
- // Fast path: We already have the bytes in a contiguous buffer. |
- // When aliasing is enabled, we can return a ByteBuffer pointing directly |
- // into the underlying byte array without copy if the CodedInputStream is |
- // constructed from a byte array. If aliasing is disabled or the input is |
- // from an InputStream or ByteString, we have to make a copy of the bytes. |
- ByteBuffer result = input == null && !bufferIsImmutable && enableAliasing |
- ? ByteBuffer.wrap(buffer, bufferPos, size).slice() |
- : ByteBuffer.wrap(Arrays.copyOfRange( |
- buffer, bufferPos, bufferPos + size)); |
- bufferPos += size; |
- return result; |
- } else if (size == 0) { |
- return Internal.EMPTY_BYTE_BUFFER; |
- } else { |
- // Slow path: Build a byte array first then copy it. |
- return ByteBuffer.wrap(readRawBytesSlowPath(size)); |
- } |
- } |
- |
- /** Read a {@code uint32} field value from the stream. */ |
- public int readUInt32() throws IOException { |
- return readRawVarint32(); |
- } |
- |
- /** |
- * Read an enum field value from the stream. Caller is responsible |
- * for converting the numeric value to an actual enum. |
- */ |
- public int readEnum() throws IOException { |
- return readRawVarint32(); |
- } |
- |
- /** Read an {@code sfixed32} field value from the stream. */ |
- public int readSFixed32() throws IOException { |
- return readRawLittleEndian32(); |
- } |
- |
- /** Read an {@code sfixed64} field value from the stream. */ |
- public long readSFixed64() throws IOException { |
- return readRawLittleEndian64(); |
- } |
- |
- /** Read an {@code sint32} field value from the stream. */ |
- public int readSInt32() throws IOException { |
- return decodeZigZag32(readRawVarint32()); |
- } |
- |
- /** Read an {@code sint64} field value from the stream. */ |
- public long readSInt64() throws IOException { |
- return decodeZigZag64(readRawVarint64()); |
- } |
- |
- // ================================================================= |
- |
- /** |
- * Read a raw Varint from the stream. If larger than 32 bits, discard the |
- * upper bits. |
- */ |
- public int readRawVarint32() throws IOException { |
- // See implementation notes for readRawVarint64 |
- fastpath: { |
- int pos = bufferPos; |
- |
- if (bufferSize == pos) { |
- break fastpath; |
- } |
- |
- final byte[] buffer = this.buffer; |
- int x; |
- if ((x = buffer[pos++]) >= 0) { |
- bufferPos = pos; |
- return x; |
- } else if (bufferSize - pos < 9) { |
- break fastpath; |
- } else if ((x ^= (buffer[pos++] << 7)) < 0) { |
- x ^= (~0 << 7); |
- } else if ((x ^= (buffer[pos++] << 14)) >= 0) { |
- x ^= (~0 << 7) ^ (~0 << 14); |
- } else if ((x ^= (buffer[pos++] << 21)) < 0) { |
- x ^= (~0 << 7) ^ (~0 << 14) ^ (~0 << 21); |
- } else { |
- int y = buffer[pos++]; |
- x ^= y << 28; |
- x ^= (~0 << 7) ^ (~0 << 14) ^ (~0 << 21) ^ (~0 << 28); |
- if (y < 0 && |
- buffer[pos++] < 0 && |
- buffer[pos++] < 0 && |
- buffer[pos++] < 0 && |
- buffer[pos++] < 0 && |
- buffer[pos++] < 0) { |
- break fastpath; // Will throw malformedVarint() |
- } |
- } |
- bufferPos = pos; |
- return x; |
- } |
- return (int) readRawVarint64SlowPath(); |
- } |
- |
- private void skipRawVarint() throws IOException { |
- if (bufferSize - bufferPos >= 10) { |
- final byte[] buffer = this.buffer; |
- int pos = bufferPos; |
- for (int i = 0; i < 10; i++) { |
- if (buffer[pos++] >= 0) { |
- bufferPos = pos; |
- return; |
- } |
- } |
- } |
- skipRawVarintSlowPath(); |
- } |
- |
- private void skipRawVarintSlowPath() throws IOException { |
- for (int i = 0; i < 10; i++) { |
- if (readRawByte() >= 0) { |
- return; |
- } |
- } |
- throw InvalidProtocolBufferException.malformedVarint(); |
- } |
- |
- /** |
- * Reads a varint from the input one byte at a time, so that it does not |
- * read any bytes after the end of the varint. If you simply wrapped the |
- * stream in a CodedInputStream and used {@link #readRawVarint32(InputStream)} |
- * then you would probably end up reading past the end of the varint since |
- * CodedInputStream buffers its input. |
- */ |
- static int readRawVarint32(final InputStream input) throws IOException { |
- final int firstByte = input.read(); |
- if (firstByte == -1) { |
- throw InvalidProtocolBufferException.truncatedMessage(); |
- } |
- return readRawVarint32(firstByte, input); |
- } |
- |
- /** |
- * Like {@link #readRawVarint32(InputStream)}, but expects that the caller |
- * has already read one byte. This allows the caller to determine if EOF |
- * has been reached before attempting to read. |
- */ |
- public static int readRawVarint32( |
- final int firstByte, final InputStream input) throws IOException { |
- if ((firstByte & 0x80) == 0) { |
- return firstByte; |
- } |
- |
- int result = firstByte & 0x7f; |
- int offset = 7; |
- for (; offset < 32; offset += 7) { |
- final int b = input.read(); |
- if (b == -1) { |
- throw InvalidProtocolBufferException.truncatedMessage(); |
- } |
- result |= (b & 0x7f) << offset; |
- if ((b & 0x80) == 0) { |
- return result; |
- } |
- } |
- // Keep reading up to 64 bits. |
- for (; offset < 64; offset += 7) { |
- final int b = input.read(); |
- if (b == -1) { |
- throw InvalidProtocolBufferException.truncatedMessage(); |
- } |
- if ((b & 0x80) == 0) { |
- return result; |
- } |
- } |
- throw InvalidProtocolBufferException.malformedVarint(); |
- } |
- |
- /** Read a raw Varint from the stream. */ |
- public long readRawVarint64() throws IOException { |
- // Implementation notes: |
- // |
- // Optimized for one-byte values, expected to be common. |
- // The particular code below was selected from various candidates |
- // empirically, by winning VarintBenchmark. |
- // |
- // Sign extension of (signed) Java bytes is usually a nuisance, but |
- // we exploit it here to more easily obtain the sign of bytes read. |
- // Instead of cleaning up the sign extension bits by masking eagerly, |
- // we delay until we find the final (positive) byte, when we clear all |
- // accumulated bits with one xor. We depend on javac to constant fold. |
- fastpath: { |
- int pos = bufferPos; |
- |
- if (bufferSize == pos) { |
- break fastpath; |
- } |
- |
- final byte[] buffer = this.buffer; |
- long x; |
- int y; |
- if ((y = buffer[pos++]) >= 0) { |
- bufferPos = pos; |
- return y; |
- } else if (bufferSize - pos < 9) { |
- break fastpath; |
- } else if ((y ^= (buffer[pos++] << 7)) < 0) { |
- x = y ^ (~0 << 7); |
- } else if ((y ^= (buffer[pos++] << 14)) >= 0) { |
- x = y ^ ((~0 << 7) ^ (~0 << 14)); |
- } else if ((y ^= (buffer[pos++] << 21)) < 0) { |
- x = y ^ ((~0 << 7) ^ (~0 << 14) ^ (~0 << 21)); |
- } else if ((x = ((long) y) ^ ((long) buffer[pos++] << 28)) >= 0L) { |
- x ^= (~0L << 7) ^ (~0L << 14) ^ (~0L << 21) ^ (~0L << 28); |
- } else if ((x ^= ((long) buffer[pos++] << 35)) < 0L) { |
- x ^= (~0L << 7) ^ (~0L << 14) ^ (~0L << 21) ^ (~0L << 28) ^ (~0L << 35); |
- } else if ((x ^= ((long) buffer[pos++] << 42)) >= 0L) { |
- x ^= (~0L << 7) ^ (~0L << 14) ^ (~0L << 21) ^ (~0L << 28) ^ (~0L << 35) ^ (~0L << 42); |
- } else if ((x ^= ((long) buffer[pos++] << 49)) < 0L) { |
- x ^= (~0L << 7) ^ (~0L << 14) ^ (~0L << 21) ^ (~0L << 28) ^ (~0L << 35) ^ (~0L << 42) |
- ^ (~0L << 49); |
- } else { |
- x ^= ((long) buffer[pos++] << 56); |
- x ^= (~0L << 7) ^ (~0L << 14) ^ (~0L << 21) ^ (~0L << 28) ^ (~0L << 35) ^ (~0L << 42) |
- ^ (~0L << 49) ^ (~0L << 56); |
- if (x < 0L) { |
- if (buffer[pos++] < 0L) { |
- break fastpath; // Will throw malformedVarint() |
- } |
- } |
- } |
- bufferPos = pos; |
- return x; |
- } |
- return readRawVarint64SlowPath(); |
- } |
- |
- /** Variant of readRawVarint64 for when uncomfortably close to the limit. */ |
- /* Visible for testing */ |
- long readRawVarint64SlowPath() throws IOException { |
- long result = 0; |
- for (int shift = 0; shift < 64; shift += 7) { |
- final byte b = readRawByte(); |
- result |= (long) (b & 0x7F) << shift; |
- if ((b & 0x80) == 0) { |
- return result; |
- } |
- } |
- throw InvalidProtocolBufferException.malformedVarint(); |
- } |
- |
- /** Read a 32-bit little-endian integer from the stream. */ |
- public int readRawLittleEndian32() throws IOException { |
- int pos = bufferPos; |
- |
- // hand-inlined ensureAvailable(4); |
- if (bufferSize - pos < 4) { |
- refillBuffer(4); |
- pos = bufferPos; |
- } |
- |
- final byte[] buffer = this.buffer; |
- bufferPos = pos + 4; |
- return (((buffer[pos] & 0xff)) | |
- ((buffer[pos + 1] & 0xff) << 8) | |
- ((buffer[pos + 2] & 0xff) << 16) | |
- ((buffer[pos + 3] & 0xff) << 24)); |
- } |
- |
- /** Read a 64-bit little-endian integer from the stream. */ |
- public long readRawLittleEndian64() throws IOException { |
- int pos = bufferPos; |
- |
- // hand-inlined ensureAvailable(8); |
- if (bufferSize - pos < 8) { |
- refillBuffer(8); |
- pos = bufferPos; |
- } |
- |
- final byte[] buffer = this.buffer; |
- bufferPos = pos + 8; |
- return ((((long) buffer[pos] & 0xffL)) | |
- (((long) buffer[pos + 1] & 0xffL) << 8) | |
- (((long) buffer[pos + 2] & 0xffL) << 16) | |
- (((long) buffer[pos + 3] & 0xffL) << 24) | |
- (((long) buffer[pos + 4] & 0xffL) << 32) | |
- (((long) buffer[pos + 5] & 0xffL) << 40) | |
- (((long) buffer[pos + 6] & 0xffL) << 48) | |
- (((long) buffer[pos + 7] & 0xffL) << 56)); |
- } |
- |
- /** |
- * Decode a ZigZag-encoded 32-bit value. ZigZag encodes signed integers |
- * into values that can be efficiently encoded with varint. (Otherwise, |
- * negative values must be sign-extended to 64 bits to be varint encoded, |
- * thus always taking 10 bytes on the wire.) |
- * |
- * @param n An unsigned 32-bit integer, stored in a signed int because |
- * Java has no explicit unsigned support. |
- * @return A signed 32-bit integer. |
- */ |
- public static int decodeZigZag32(final int n) { |
- return (n >>> 1) ^ -(n & 1); |
- } |
- |
- /** |
- * Decode a ZigZag-encoded 64-bit value. ZigZag encodes signed integers |
- * into values that can be efficiently encoded with varint. (Otherwise, |
- * negative values must be sign-extended to 64 bits to be varint encoded, |
- * thus always taking 10 bytes on the wire.) |
- * |
- * @param n An unsigned 64-bit integer, stored in a signed int because |
- * Java has no explicit unsigned support. |
- * @return A signed 64-bit integer. |
- */ |
- public static long decodeZigZag64(final long n) { |
- return (n >>> 1) ^ -(n & 1); |
- } |
- |
- // ----------------------------------------------------------------- |
- |
- private final byte[] buffer; |
- private final boolean bufferIsImmutable; |
- private int bufferSize; |
- private int bufferSizeAfterLimit; |
- private int bufferPos; |
- private final InputStream input; |
- private int lastTag; |
- private boolean enableAliasing = false; |
- |
- /** |
- * The total number of bytes read before the current buffer. The total |
- * bytes read up to the current position can be computed as |
- * {@code totalBytesRetired + bufferPos}. This value may be negative if |
- * reading started in the middle of the current buffer (e.g. if the |
- * constructor that takes a byte array and an offset was used). |
- */ |
- private int totalBytesRetired; |
- |
- /** The absolute position of the end of the current message. */ |
- private int currentLimit = Integer.MAX_VALUE; |
- |
- /** See setRecursionLimit() */ |
- private int recursionDepth; |
- private int recursionLimit = DEFAULT_RECURSION_LIMIT; |
- |
- /** See setSizeLimit() */ |
- private int sizeLimit = DEFAULT_SIZE_LIMIT; |
- |
- private static final int DEFAULT_RECURSION_LIMIT = 100; |
- private static final int DEFAULT_SIZE_LIMIT = 64 << 20; // 64MB |
- private static final int BUFFER_SIZE = 4096; |
- |
- private CodedInputStream(final byte[] buffer, final int off, final int len) { |
- this.buffer = buffer; |
- bufferSize = off + len; |
- bufferPos = off; |
- totalBytesRetired = -off; |
- input = null; |
- bufferIsImmutable = false; |
- } |
- |
- private CodedInputStream(final InputStream input) { |
- buffer = new byte[BUFFER_SIZE]; |
- bufferSize = 0; |
- bufferPos = 0; |
- totalBytesRetired = 0; |
- this.input = input; |
- bufferIsImmutable = false; |
- } |
- |
- private CodedInputStream(final LiteralByteString byteString) { |
- buffer = byteString.bytes; |
- bufferPos = byteString.getOffsetIntoBytes(); |
- bufferSize = bufferPos + byteString.size(); |
- totalBytesRetired = -bufferPos; |
- input = null; |
- bufferIsImmutable = true; |
- } |
- |
- public void enableAliasing(boolean enabled) { |
- this.enableAliasing = enabled; |
- } |
- |
- /** |
- * Set the maximum message recursion depth. In order to prevent malicious |
- * messages from causing stack overflows, {@code CodedInputStream} limits |
- * how deeply messages may be nested. The default limit is 64. |
- * |
- * @return the old limit. |
- */ |
- public int setRecursionLimit(final int limit) { |
- if (limit < 0) { |
- throw new IllegalArgumentException( |
- "Recursion limit cannot be negative: " + limit); |
- } |
- final int oldLimit = recursionLimit; |
- recursionLimit = limit; |
- return oldLimit; |
- } |
- |
- /** |
- * Set the maximum message size. In order to prevent malicious |
- * messages from exhausting memory or causing integer overflows, |
- * {@code CodedInputStream} limits how large a message may be. |
- * The default limit is 64MB. You should set this limit as small |
- * as you can without harming your app's functionality. Note that |
- * size limits only apply when reading from an {@code InputStream}, not |
- * when constructed around a raw byte array (nor with |
- * {@link ByteString#newCodedInput}). |
- * <p> |
- * If you want to read several messages from a single CodedInputStream, you |
- * could call {@link #resetSizeCounter()} after each one to avoid hitting the |
- * size limit. |
- * |
- * @return the old limit. |
- */ |
- public int setSizeLimit(final int limit) { |
- if (limit < 0) { |
- throw new IllegalArgumentException( |
- "Size limit cannot be negative: " + limit); |
- } |
- final int oldLimit = sizeLimit; |
- sizeLimit = limit; |
- return oldLimit; |
- } |
- |
- /** |
- * Resets the current size counter to zero (see {@link #setSizeLimit(int)}). |
- */ |
- public void resetSizeCounter() { |
- totalBytesRetired = -bufferPos; |
- } |
- |
- /** |
- * Sets {@code currentLimit} to (current position) + {@code byteLimit}. This |
- * is called when descending into a length-delimited embedded message. |
- * |
- * <p>Note that {@code pushLimit()} does NOT affect how many bytes the |
- * {@code CodedInputStream} reads from an underlying {@code InputStream} when |
- * refreshing its buffer. If you need to prevent reading past a certain |
- * point in the underlying {@code InputStream} (e.g. because you expect it to |
- * contain more data after the end of the message which you need to handle |
- * differently) then you must place a wrapper around your {@code InputStream} |
- * which limits the amount of data that can be read from it. |
- * |
- * @return the old limit. |
- */ |
- public int pushLimit(int byteLimit) throws InvalidProtocolBufferException { |
- if (byteLimit < 0) { |
- throw InvalidProtocolBufferException.negativeSize(); |
- } |
- byteLimit += totalBytesRetired + bufferPos; |
- final int oldLimit = currentLimit; |
- if (byteLimit > oldLimit) { |
- throw InvalidProtocolBufferException.truncatedMessage(); |
- } |
- currentLimit = byteLimit; |
- |
- recomputeBufferSizeAfterLimit(); |
- |
- return oldLimit; |
- } |
- |
- private void recomputeBufferSizeAfterLimit() { |
- bufferSize += bufferSizeAfterLimit; |
- final int bufferEnd = totalBytesRetired + bufferSize; |
- if (bufferEnd > currentLimit) { |
- // Limit is in current buffer. |
- bufferSizeAfterLimit = bufferEnd - currentLimit; |
- bufferSize -= bufferSizeAfterLimit; |
- } else { |
- bufferSizeAfterLimit = 0; |
- } |
- } |
- |
- /** |
- * Discards the current limit, returning to the previous limit. |
- * |
- * @param oldLimit The old limit, as returned by {@code pushLimit}. |
- */ |
- public void popLimit(final int oldLimit) { |
- currentLimit = oldLimit; |
- recomputeBufferSizeAfterLimit(); |
- } |
- |
- /** |
- * Returns the number of bytes to be read before the current limit. |
- * If no limit is set, returns -1. |
- */ |
- public int getBytesUntilLimit() { |
- if (currentLimit == Integer.MAX_VALUE) { |
- return -1; |
- } |
- |
- final int currentAbsolutePosition = totalBytesRetired + bufferPos; |
- return currentLimit - currentAbsolutePosition; |
- } |
- |
- /** |
- * Returns true if the stream has reached the end of the input. This is the |
- * case if either the end of the underlying input source has been reached or |
- * if the stream has reached a limit created using {@link #pushLimit(int)}. |
- */ |
- public boolean isAtEnd() throws IOException { |
- return bufferPos == bufferSize && !tryRefillBuffer(1); |
- } |
- |
- /** |
- * The total bytes read up to the current position. Calling |
- * {@link #resetSizeCounter()} resets this value to zero. |
- */ |
- public int getTotalBytesRead() { |
- return totalBytesRetired + bufferPos; |
- } |
- |
- private interface RefillCallback { |
- void onRefill(); |
- } |
- |
- private RefillCallback refillCallback = null; |
- |
- /** |
- * Reads more bytes from the input, making at least {@code n} bytes available |
- * in the buffer. Caller must ensure that the requested space is not yet |
- * available, and that the requested space is less than BUFFER_SIZE. |
- * |
- * @throws InvalidProtocolBufferException The end of the stream or the current |
- * limit was reached. |
- */ |
- private void refillBuffer(int n) throws IOException { |
- if (!tryRefillBuffer(n)) { |
- throw InvalidProtocolBufferException.truncatedMessage(); |
- } |
- } |
- |
- /** |
- * Tries to read more bytes from the input, making at least {@code n} bytes |
- * available in the buffer. Caller must ensure that the requested space is |
- * not yet available, and that the requested space is less than BUFFER_SIZE. |
- * |
- * @return {@code true} if the bytes could be made available; {@code false} |
- * if the end of the stream or the current limit was reached. |
- */ |
- private boolean tryRefillBuffer(int n) throws IOException { |
- if (bufferPos + n <= bufferSize) { |
- throw new IllegalStateException( |
- "refillBuffer() called when " + n + |
- " bytes were already available in buffer"); |
- } |
- |
- if (totalBytesRetired + bufferPos + n > currentLimit) { |
- // Oops, we hit a limit. |
- return false; |
- } |
- |
- if (refillCallback != null) { |
- refillCallback.onRefill(); |
- } |
- |
- if (input != null) { |
- int pos = bufferPos; |
- if (pos > 0) { |
- if (bufferSize > pos) { |
- System.arraycopy(buffer, pos, buffer, 0, bufferSize - pos); |
- } |
- totalBytesRetired += pos; |
- bufferSize -= pos; |
- bufferPos = 0; |
- } |
- |
- int bytesRead = input.read(buffer, bufferSize, buffer.length - bufferSize); |
- if (bytesRead == 0 || bytesRead < -1 || bytesRead > buffer.length) { |
- throw new IllegalStateException( |
- "InputStream#read(byte[]) returned invalid result: " + bytesRead + |
- "\nThe InputStream implementation is buggy."); |
- } |
- if (bytesRead > 0) { |
- bufferSize += bytesRead; |
- // Integer-overflow-conscious check against sizeLimit |
- if (totalBytesRetired + n - sizeLimit > 0) { |
- throw InvalidProtocolBufferException.sizeLimitExceeded(); |
- } |
- recomputeBufferSizeAfterLimit(); |
- return (bufferSize >= n) ? true : tryRefillBuffer(n); |
- } |
- } |
- |
- return false; |
- } |
- |
- /** |
- * Read one byte from the input. |
- * |
- * @throws InvalidProtocolBufferException The end of the stream or the current |
- * limit was reached. |
- */ |
- public byte readRawByte() throws IOException { |
- if (bufferPos == bufferSize) { |
- refillBuffer(1); |
- } |
- return buffer[bufferPos++]; |
- } |
- |
- /** |
- * Read a fixed size of bytes from the input. |
- * |
- * @throws InvalidProtocolBufferException The end of the stream or the current |
- * limit was reached. |
- */ |
- public byte[] readRawBytes(final int size) throws IOException { |
- final int pos = bufferPos; |
- if (size <= (bufferSize - pos) && size > 0) { |
- bufferPos = pos + size; |
- return Arrays.copyOfRange(buffer, pos, pos + size); |
- } else { |
- return readRawBytesSlowPath(size); |
- } |
- } |
- |
- /** |
- * Exactly like readRawBytes, but caller must have already checked the fast |
- * path: (size <= (bufferSize - pos) && size > 0) |
- */ |
- private byte[] readRawBytesSlowPath(final int size) throws IOException { |
- if (size <= 0) { |
- if (size == 0) { |
- return Internal.EMPTY_BYTE_ARRAY; |
- } else { |
- throw InvalidProtocolBufferException.negativeSize(); |
- } |
- } |
- |
- // Verify that the message size so far has not exceeded sizeLimit. |
- int currentMessageSize = totalBytesRetired + bufferPos + size; |
- if (currentMessageSize > sizeLimit) { |
- throw InvalidProtocolBufferException.sizeLimitExceeded(); |
- } |
- |
- // Verify that the message size so far has not exceeded currentLimit. |
- if (currentMessageSize > currentLimit) { |
- // Read to the end of the stream anyway. |
- skipRawBytes(currentLimit - totalBytesRetired - bufferPos); |
- throw InvalidProtocolBufferException.truncatedMessage(); |
- } |
- |
- // We need the input stream to proceed. |
- if (input == null) { |
- throw InvalidProtocolBufferException.truncatedMessage(); |
- } |
- |
- final int originalBufferPos = bufferPos; |
- final int bufferedBytes = bufferSize - bufferPos; |
- |
- // Mark the current buffer consumed. |
- totalBytesRetired += bufferSize; |
- bufferPos = 0; |
- bufferSize = 0; |
- |
- // Determine the number of bytes we need to read from the input stream. |
- int sizeLeft = size - bufferedBytes; |
- // TODO(nathanmittler): Consider using a value larger than BUFFER_SIZE. |
- if (sizeLeft < BUFFER_SIZE || sizeLeft <= input.available()) { |
- // Either the bytes we need are known to be available, or the required buffer is |
- // within an allowed threshold - go ahead and allocate the buffer now. |
- final byte[] bytes = new byte[size]; |
- |
- // Copy all of the buffered bytes to the result buffer. |
- System.arraycopy(buffer, originalBufferPos, bytes, 0, bufferedBytes); |
- |
- // Fill the remaining bytes from the input stream. |
- int pos = bufferedBytes; |
- while (pos < bytes.length) { |
- int n = input.read(bytes, pos, size - pos); |
- if (n == -1) { |
- throw InvalidProtocolBufferException.truncatedMessage(); |
- } |
- totalBytesRetired += n; |
- pos += n; |
- } |
- |
- return bytes; |
- } |
- |
- // The size is very large. For security reasons, we can't allocate the |
- // entire byte array yet. The size comes directly from the input, so a |
- // maliciously-crafted message could provide a bogus very large size in |
- // order to trick the app into allocating a lot of memory. We avoid this |
- // by allocating and reading only a small chunk at a time, so that the |
- // malicious message must actually *be* extremely large to cause |
- // problems. Meanwhile, we limit the allowed size of a message elsewhere. |
- final List<byte[]> chunks = new ArrayList<byte[]>(); |
- |
- while (sizeLeft > 0) { |
- // TODO(nathanmittler): Consider using a value larger than BUFFER_SIZE. |
- final byte[] chunk = new byte[Math.min(sizeLeft, BUFFER_SIZE)]; |
- int pos = 0; |
- while (pos < chunk.length) { |
- final int n = input.read(chunk, pos, chunk.length - pos); |
- if (n == -1) { |
- throw InvalidProtocolBufferException.truncatedMessage(); |
- } |
- totalBytesRetired += n; |
- pos += n; |
- } |
- sizeLeft -= chunk.length; |
- chunks.add(chunk); |
- } |
- |
- // OK, got everything. Now concatenate it all into one buffer. |
- final byte[] bytes = new byte[size]; |
- |
- // Start by copying the leftover bytes from this.buffer. |
- System.arraycopy(buffer, originalBufferPos, bytes, 0, bufferedBytes); |
- |
- // And now all the chunks. |
- int pos = bufferedBytes; |
- for (final byte[] chunk : chunks) { |
- System.arraycopy(chunk, 0, bytes, pos, chunk.length); |
- pos += chunk.length; |
- } |
- |
- // Done. |
- return bytes; |
- } |
- |
- /** |
- * Reads and discards {@code size} bytes. |
- * |
- * @throws InvalidProtocolBufferException The end of the stream or the current |
- * limit was reached. |
- */ |
- public void skipRawBytes(final int size) throws IOException { |
- if (size <= (bufferSize - bufferPos) && size >= 0) { |
- // We have all the bytes we need already. |
- bufferPos += size; |
- } else { |
- skipRawBytesSlowPath(size); |
- } |
- } |
- |
- /** |
- * Exactly like skipRawBytes, but caller must have already checked the fast |
- * path: (size <= (bufferSize - pos) && size >= 0) |
- */ |
- private void skipRawBytesSlowPath(final int size) throws IOException { |
- if (size < 0) { |
- throw InvalidProtocolBufferException.negativeSize(); |
- } |
- |
- if (totalBytesRetired + bufferPos + size > currentLimit) { |
- // Read to the end of the stream anyway. |
- skipRawBytes(currentLimit - totalBytesRetired - bufferPos); |
- // Then fail. |
- throw InvalidProtocolBufferException.truncatedMessage(); |
- } |
- |
- // Skipping more bytes than are in the buffer. First skip what we have. |
- int pos = bufferSize - bufferPos; |
- bufferPos = bufferSize; |
- |
- // Keep refilling the buffer until we get to the point we wanted to skip to. |
- // This has the side effect of ensuring the limits are updated correctly. |
- refillBuffer(1); |
- while (size - pos > bufferSize) { |
- pos += bufferSize; |
- bufferPos = bufferSize; |
- refillBuffer(1); |
- } |
- |
- bufferPos = size - pos; |
- } |
-} |