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Diffstat (limited to 'javanano/src/main/java/com/google/protobuf/nano/CodedOutputByteBufferNano.java')
| -rw-r--r-- | javanano/src/main/java/com/google/protobuf/nano/CodedOutputByteBufferNano.java | 1214 |
1 files changed, 0 insertions, 1214 deletions
diff --git a/javanano/src/main/java/com/google/protobuf/nano/CodedOutputByteBufferNano.java b/javanano/src/main/java/com/google/protobuf/nano/CodedOutputByteBufferNano.java deleted file mode 100644 index 322ada8e..00000000 --- a/javanano/src/main/java/com/google/protobuf/nano/CodedOutputByteBufferNano.java +++ /dev/null @@ -1,1214 +0,0 @@ -// Protocol Buffers - Google's data interchange format -// Copyright 2013 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.nano; - -import java.io.IOException; -import java.nio.BufferOverflowException; -import java.nio.ByteBuffer; -import java.nio.ByteOrder; -import java.nio.ReadOnlyBufferException; - -/** - * Encodes and writes protocol message fields. - * - * <p>This class contains two kinds of methods: methods that write specific - * protocol message constructs and field types (e.g. {@link #writeTag} and - * {@link #writeInt32}) and methods that write low-level values (e.g. - * {@link #writeRawVarint32} and {@link #writeRawBytes}). If you are - * writing encoded protocol messages, you should use the former methods, but if - * you are writing some other format of your own design, use the latter. - * - * <p>This class is totally unsynchronized. - * - * @author kneton@google.com Kenton Varda - */ -public final class CodedOutputByteBufferNano { - /* max bytes per java UTF-16 char in UTF-8 */ - private static final int MAX_UTF8_EXPANSION = 3; - private final ByteBuffer buffer; - - private CodedOutputByteBufferNano(final byte[] buffer, final int offset, - final int length) { - this(ByteBuffer.wrap(buffer, offset, length)); - } - - private CodedOutputByteBufferNano(final ByteBuffer buffer) { - this.buffer = buffer; - this.buffer.order(ByteOrder.LITTLE_ENDIAN); - } - - /** - * Create a new {@code CodedOutputStream} that writes directly to the given - * byte array. If more bytes are written than fit in the array, - * {@link OutOfSpaceException} will be thrown. Writing directly to a flat - * array is faster than writing to an {@code OutputStream}. - */ - public static CodedOutputByteBufferNano newInstance(final byte[] flatArray) { - return newInstance(flatArray, 0, flatArray.length); - } - - /** - * Create a new {@code CodedOutputStream} that writes directly to the given - * byte array slice. If more bytes are written than fit in the slice, - * {@link OutOfSpaceException} will be thrown. Writing directly to a flat - * array is faster than writing to an {@code OutputStream}. - */ - public static CodedOutputByteBufferNano newInstance(final byte[] flatArray, - final int offset, - final int length) { - return new CodedOutputByteBufferNano(flatArray, offset, length); - } - - // ----------------------------------------------------------------- - - /** Write a {@code double} field, including tag, to the stream. */ - public void writeDouble(final int fieldNumber, final double value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_FIXED64); - writeDoubleNoTag(value); - } - - /** Write a {@code float} field, including tag, to the stream. */ - public void writeFloat(final int fieldNumber, final float value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_FIXED32); - writeFloatNoTag(value); - } - - /** Write a {@code uint64} field, including tag, to the stream. */ - public void writeUInt64(final int fieldNumber, final long value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_VARINT); - writeUInt64NoTag(value); - } - - /** Write an {@code int64} field, including tag, to the stream. */ - public void writeInt64(final int fieldNumber, final long value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_VARINT); - writeInt64NoTag(value); - } - - /** Write an {@code int32} field, including tag, to the stream. */ - public void writeInt32(final int fieldNumber, final int value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_VARINT); - writeInt32NoTag(value); - } - - /** Write a {@code fixed64} field, including tag, to the stream. */ - public void writeFixed64(final int fieldNumber, final long value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_FIXED64); - writeFixed64NoTag(value); - } - - /** Write a {@code fixed32} field, including tag, to the stream. */ - public void writeFixed32(final int fieldNumber, final int value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_FIXED32); - writeFixed32NoTag(value); - } - - /** Write a {@code bool} field, including tag, to the stream. */ - public void writeBool(final int fieldNumber, final boolean value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_VARINT); - writeBoolNoTag(value); - } - - /** Write a {@code string} field, including tag, to the stream. */ - public void writeString(final int fieldNumber, final String value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_LENGTH_DELIMITED); - writeStringNoTag(value); - } - - /** Write a {@code group} field, including tag, to the stream. */ - public void writeGroup(final int fieldNumber, final MessageNano value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_START_GROUP); - writeGroupNoTag(value); - writeTag(fieldNumber, WireFormatNano.WIRETYPE_END_GROUP); - } - - /** Write an embedded message field, including tag, to the stream. */ - public void writeMessage(final int fieldNumber, final MessageNano value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_LENGTH_DELIMITED); - writeMessageNoTag(value); - } - - /** Write a {@code bytes} field, including tag, to the stream. */ - public void writeBytes(final int fieldNumber, final byte[] value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_LENGTH_DELIMITED); - writeBytesNoTag(value); - } - - /** Write a {@code uint32} field, including tag, to the stream. */ - public void writeUInt32(final int fieldNumber, final int value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_VARINT); - writeUInt32NoTag(value); - } - - /** - * Write an enum field, including tag, to the stream. Caller is responsible - * for converting the enum value to its numeric value. - */ - public void writeEnum(final int fieldNumber, final int value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_VARINT); - writeEnumNoTag(value); - } - - /** Write an {@code sfixed32} field, including tag, to the stream. */ - public void writeSFixed32(final int fieldNumber, final int value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_FIXED32); - writeSFixed32NoTag(value); - } - - /** Write an {@code sfixed64} field, including tag, to the stream. */ - public void writeSFixed64(final int fieldNumber, final long value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_FIXED64); - writeSFixed64NoTag(value); - } - - /** Write an {@code sint32} field, including tag, to the stream. */ - public void writeSInt32(final int fieldNumber, final int value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_VARINT); - writeSInt32NoTag(value); - } - - /** Write an {@code sint64} field, including tag, to the stream. */ - public void writeSInt64(final int fieldNumber, final long value) - throws IOException { - writeTag(fieldNumber, WireFormatNano.WIRETYPE_VARINT); - writeSInt64NoTag(value); - } - - /** - * Write a MessageSet extension field to the stream. For historical reasons, - * the wire format differs from normal fields. - */ -// public void writeMessageSetExtension(final int fieldNumber, -// final MessageMicro value) -// throws IOException { -// writeTag(WireFormatMicro.MESSAGE_SET_ITEM, WireFormatMicro.WIRETYPE_START_GROUP); -// writeUInt32(WireFormatMicro.MESSAGE_SET_TYPE_ID, fieldNumber); -// writeMessage(WireFormatMicro.MESSAGE_SET_MESSAGE, value); -// writeTag(WireFormatMicro.MESSAGE_SET_ITEM, WireFormatMicro.WIRETYPE_END_GROUP); -// } - - /** - * Write an unparsed MessageSet extension field to the stream. For - * historical reasons, the wire format differs from normal fields. - */ -// public void writeRawMessageSetExtension(final int fieldNumber, -// final ByteStringMicro value) -// throws IOException { -// writeTag(WireFormatMicro.MESSAGE_SET_ITEM, WireFormatMicro.WIRETYPE_START_GROUP); -// writeUInt32(WireFormatMicro.MESSAGE_SET_TYPE_ID, fieldNumber); -// writeBytes(WireFormatMicro.MESSAGE_SET_MESSAGE, value); -// writeTag(WireFormatMicro.MESSAGE_SET_ITEM, WireFormatMicro.WIRETYPE_END_GROUP); -// } - - // ----------------------------------------------------------------- - - /** Write a {@code double} field to the stream. */ - public void writeDoubleNoTag(final double value) throws IOException { - writeRawLittleEndian64(Double.doubleToLongBits(value)); - } - - /** Write a {@code float} field to the stream. */ - public void writeFloatNoTag(final float value) throws IOException { - writeRawLittleEndian32(Float.floatToIntBits(value)); - } - - /** Write a {@code uint64} field to the stream. */ - public void writeUInt64NoTag(final long value) throws IOException { - writeRawVarint64(value); - } - - /** Write an {@code int64} field to the stream. */ - public void writeInt64NoTag(final long value) throws IOException { - writeRawVarint64(value); - } - - /** Write an {@code int32} field to the stream. */ - public void writeInt32NoTag(final int value) throws IOException { - if (value >= 0) { - writeRawVarint32(value); - } else { - // Must sign-extend. - writeRawVarint64(value); - } - } - - /** Write a {@code fixed64} field to the stream. */ - public void writeFixed64NoTag(final long value) throws IOException { - writeRawLittleEndian64(value); - } - - /** Write a {@code fixed32} field to the stream. */ - public void writeFixed32NoTag(final int value) throws IOException { - writeRawLittleEndian32(value); - } - - /** Write a {@code bool} field to the stream. */ - public void writeBoolNoTag(final boolean value) throws IOException { - writeRawByte(value ? 1 : 0); - } - - /** Write a {@code string} field to the stream. */ - public void writeStringNoTag(final String value) throws IOException { - // UTF-8 byte length of the string is at least its UTF-16 code unit length (value.length()), - // and at most 3 times of it. Optimize for the case where we know this length results in a - // constant varint length - saves measuring length of the string. - try { - final int minLengthVarIntSize = computeRawVarint32Size(value.length()); - final int maxLengthVarIntSize = computeRawVarint32Size(value.length() * MAX_UTF8_EXPANSION); - if (minLengthVarIntSize == maxLengthVarIntSize) { - int oldPosition = buffer.position(); - // Buffer.position, when passed a position that is past its limit, throws - // IllegalArgumentException, and this class is documented to throw - // OutOfSpaceException instead. - if (buffer.remaining() < minLengthVarIntSize) { - throw new OutOfSpaceException(oldPosition + minLengthVarIntSize, buffer.limit()); - } - buffer.position(oldPosition + minLengthVarIntSize); - encode(value, buffer); - int newPosition = buffer.position(); - buffer.position(oldPosition); - writeRawVarint32(newPosition - oldPosition - minLengthVarIntSize); - buffer.position(newPosition); - } else { - writeRawVarint32(encodedLength(value)); - encode(value, buffer); - } - } catch (BufferOverflowException e) { - final OutOfSpaceException outOfSpaceException = new OutOfSpaceException(buffer.position(), - buffer.limit()); - outOfSpaceException.initCause(e); - throw outOfSpaceException; - } - } - - // These UTF-8 handling methods are copied from Guava's Utf8 class. - /** - * Returns the number of bytes in the UTF-8-encoded form of {@code sequence}. For a string, - * this method is equivalent to {@code string.getBytes(UTF_8).length}, but is more efficient in - * both time and space. - * - * @throws IllegalArgumentException if {@code sequence} contains ill-formed UTF-16 (unpaired - * surrogates) - */ - private static int encodedLength(CharSequence sequence) { - // Warning to maintainers: this implementation is highly optimized. - int utf16Length = sequence.length(); - int utf8Length = utf16Length; - int i = 0; - - // This loop optimizes for pure ASCII. - while (i < utf16Length && sequence.charAt(i) < 0x80) { - i++; - } - - // This loop optimizes for chars less than 0x800. - for (; i < utf16Length; i++) { - char c = sequence.charAt(i); - if (c < 0x800) { - utf8Length += ((0x7f - c) >>> 31); // branch free! - } else { - utf8Length += encodedLengthGeneral(sequence, i); - break; - } - } - - if (utf8Length < utf16Length) { - // Necessary and sufficient condition for overflow because of maximum 3x expansion - throw new IllegalArgumentException("UTF-8 length does not fit in int: " - + (utf8Length + (1L << 32))); - } - return utf8Length; - } - - private static int encodedLengthGeneral(CharSequence sequence, int start) { - int utf16Length = sequence.length(); - int utf8Length = 0; - for (int i = start; i < utf16Length; i++) { - char c = sequence.charAt(i); - if (c < 0x800) { - utf8Length += (0x7f - c) >>> 31; // branch free! - } else { - utf8Length += 2; - // jdk7+: if (Character.isSurrogate(c)) { - if (Character.MIN_SURROGATE <= c && c <= Character.MAX_SURROGATE) { - // Check that we have a well-formed surrogate pair. - int cp = Character.codePointAt(sequence, i); - if (cp < Character.MIN_SUPPLEMENTARY_CODE_POINT) { - throw new IllegalArgumentException("Unpaired surrogate at index " + i); - } - i++; - } - } - } - return utf8Length; - } - - /** - * Encodes {@code sequence} into UTF-8, in {@code byteBuffer}. For a string, this method is - * equivalent to {@code buffer.put(string.getBytes(UTF_8))}, but is more efficient in both time - * and space. Bytes are written starting at the current position. This method requires paired - * surrogates, and therefore does not support chunking. - * - * <p>To ensure sufficient space in the output buffer, either call {@link #encodedLength} to - * compute the exact amount needed, or leave room for {@code 3 * sequence.length()}, which is the - * largest possible number of bytes that any input can be encoded to. - * - * @throws IllegalArgumentException if {@code sequence} contains ill-formed UTF-16 (unpaired - * surrogates) - * @throws BufferOverflowException if {@code sequence} encoded in UTF-8 does not fit in - * {@code byteBuffer}'s remaining space. - * @throws ReadOnlyBufferException if {@code byteBuffer} is a read-only buffer. - */ - private static void encode(CharSequence sequence, ByteBuffer byteBuffer) { - if (byteBuffer.isReadOnly()) { - throw new ReadOnlyBufferException(); - } else if (byteBuffer.hasArray()) { - try { - int encoded = encode(sequence, - byteBuffer.array(), - byteBuffer.arrayOffset() + byteBuffer.position(), - byteBuffer.remaining()); - byteBuffer.position(encoded - byteBuffer.arrayOffset()); - } catch (ArrayIndexOutOfBoundsException e) { - BufferOverflowException boe = new BufferOverflowException(); - boe.initCause(e); - throw boe; - } - } else { - encodeDirect(sequence, byteBuffer); - } - } - - private static void encodeDirect(CharSequence sequence, ByteBuffer byteBuffer) { - int utf16Length = sequence.length(); - for (int i = 0; i < utf16Length; i++) { - final char c = sequence.charAt(i); - if (c < 0x80) { // ASCII - byteBuffer.put((byte) c); - } else if (c < 0x800) { // 11 bits, two UTF-8 bytes - byteBuffer.put((byte) ((0xF << 6) | (c >>> 6))); - byteBuffer.put((byte) (0x80 | (0x3F & c))); - } else if (c < Character.MIN_SURROGATE || Character.MAX_SURROGATE < c) { - // Maximium single-char code point is 0xFFFF, 16 bits, three UTF-8 bytes - byteBuffer.put((byte) ((0xF << 5) | (c >>> 12))); - byteBuffer.put((byte) (0x80 | (0x3F & (c >>> 6)))); - byteBuffer.put((byte) (0x80 | (0x3F & c))); - } else { - final char low; - if (i + 1 == sequence.length() - || !Character.isSurrogatePair(c, (low = sequence.charAt(++i)))) { - throw new IllegalArgumentException("Unpaired surrogate at index " + (i - 1)); - } - int codePoint = Character.toCodePoint(c, low); - byteBuffer.put((byte) ((0xF << 4) | (codePoint >>> 18))); - byteBuffer.put((byte) (0x80 | (0x3F & (codePoint >>> 12)))); - byteBuffer.put((byte) (0x80 | (0x3F & (codePoint >>> 6)))); - byteBuffer.put((byte) (0x80 | (0x3F & codePoint))); - } - } - } - - private static int encode(CharSequence sequence, byte[] bytes, int offset, int length) { - int utf16Length = sequence.length(); - int j = offset; - int i = 0; - int limit = offset + length; - // Designed to take advantage of - // https://wikis.oracle.com/display/HotSpotInternals/RangeCheckElimination - for (char c; i < utf16Length && i + j < limit && (c = sequence.charAt(i)) < 0x80; i++) { - bytes[j + i] = (byte) c; - } - if (i == utf16Length) { - return j + utf16Length; - } - j += i; - for (char c; i < utf16Length; i++) { - c = sequence.charAt(i); - if (c < 0x80 && j < limit) { - bytes[j++] = (byte) c; - } else if (c < 0x800 && j <= limit - 2) { // 11 bits, two UTF-8 bytes - bytes[j++] = (byte) ((0xF << 6) | (c >>> 6)); - bytes[j++] = (byte) (0x80 | (0x3F & c)); - } else if ((c < Character.MIN_SURROGATE || Character.MAX_SURROGATE < c) && j <= limit - 3) { - // Maximum single-char code point is 0xFFFF, 16 bits, three UTF-8 bytes - bytes[j++] = (byte) ((0xF << 5) | (c >>> 12)); - bytes[j++] = (byte) (0x80 | (0x3F & (c >>> 6))); - bytes[j++] = (byte) (0x80 | (0x3F & c)); - } else if (j <= limit - 4) { - // Minimum code point represented by a surrogate pair is 0x10000, 17 bits, four UTF-8 bytes - final char low; - if (i + 1 == sequence.length() - || !Character.isSurrogatePair(c, (low = sequence.charAt(++i)))) { - throw new IllegalArgumentException("Unpaired surrogate at index " + (i - 1)); - } - int codePoint = Character.toCodePoint(c, low); - bytes[j++] = (byte) ((0xF << 4) | (codePoint >>> 18)); - bytes[j++] = (byte) (0x80 | (0x3F & (codePoint >>> 12))); - bytes[j++] = (byte) (0x80 | (0x3F & (codePoint >>> 6))); - bytes[j++] = (byte) (0x80 | (0x3F & codePoint)); - } else { - throw new ArrayIndexOutOfBoundsException("Failed writing " + c + " at index " + j); - } - } - return j; - } - - // End guava UTF-8 methods - - - /** Write a {@code group} field to the stream. */ - public void writeGroupNoTag(final MessageNano value) throws IOException { - value.writeTo(this); - } - - /** Write an embedded message field to the stream. */ - public void writeMessageNoTag(final MessageNano value) throws IOException { - writeRawVarint32(value.getCachedSize()); - value.writeTo(this); - } - - /** Write a {@code bytes} field to the stream. */ - public void writeBytesNoTag(final byte[] value) throws IOException { - writeRawVarint32(value.length); - writeRawBytes(value); - } - - /** Write a {@code uint32} field to the stream. */ - public void writeUInt32NoTag(final int value) throws IOException { - writeRawVarint32(value); - } - - /** - * Write an enum field to the stream. Caller is responsible - * for converting the enum value to its numeric value. - */ - public void writeEnumNoTag(final int value) throws IOException { - writeRawVarint32(value); - } - - /** Write an {@code sfixed32} field to the stream. */ - public void writeSFixed32NoTag(final int value) throws IOException { - writeRawLittleEndian32(value); - } - - /** Write an {@code sfixed64} field to the stream. */ - public void writeSFixed64NoTag(final long value) throws IOException { - writeRawLittleEndian64(value); - } - - /** Write an {@code sint32} field to the stream. */ - public void writeSInt32NoTag(final int value) throws IOException { - writeRawVarint32(encodeZigZag32(value)); - } - - /** Write an {@code sint64} field to the stream. */ - public void writeSInt64NoTag(final long value) throws IOException { - writeRawVarint64(encodeZigZag64(value)); - } - - // ================================================================= - - /** - * Compute the number of bytes that would be needed to encode a - * {@code double} field, including tag. - */ - public static int computeDoubleSize(final int fieldNumber, - final double value) { - return computeTagSize(fieldNumber) + computeDoubleSizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code float} field, including tag. - */ - public static int computeFloatSize(final int fieldNumber, final float value) { - return computeTagSize(fieldNumber) + computeFloatSizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code uint64} field, including tag. - */ - public static int computeUInt64Size(final int fieldNumber, final long value) { - return computeTagSize(fieldNumber) + computeUInt64SizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode an - * {@code int64} field, including tag. - */ - public static int computeInt64Size(final int fieldNumber, final long value) { - return computeTagSize(fieldNumber) + computeInt64SizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode an - * {@code int32} field, including tag. - */ - public static int computeInt32Size(final int fieldNumber, final int value) { - return computeTagSize(fieldNumber) + computeInt32SizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code fixed64} field, including tag. - */ - public static int computeFixed64Size(final int fieldNumber, - final long value) { - return computeTagSize(fieldNumber) + computeFixed64SizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code fixed32} field, including tag. - */ - public static int computeFixed32Size(final int fieldNumber, - final int value) { - return computeTagSize(fieldNumber) + computeFixed32SizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code bool} field, including tag. - */ - public static int computeBoolSize(final int fieldNumber, - final boolean value) { - return computeTagSize(fieldNumber) + computeBoolSizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code string} field, including tag. - */ - public static int computeStringSize(final int fieldNumber, - final String value) { - return computeTagSize(fieldNumber) + computeStringSizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code group} field, including tag. - */ - public static int computeGroupSize(final int fieldNumber, - final MessageNano value) { - return computeTagSize(fieldNumber) * 2 + computeGroupSizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode an - * embedded message field, including tag. - */ - public static int computeMessageSize(final int fieldNumber, - final MessageNano value) { - return computeTagSize(fieldNumber) + computeMessageSizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code bytes} field, including tag. - */ - public static int computeBytesSize(final int fieldNumber, - final byte[] value) { - return computeTagSize(fieldNumber) + computeBytesSizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code uint32} field, including tag. - */ - public static int computeUInt32Size(final int fieldNumber, final int value) { - return computeTagSize(fieldNumber) + computeUInt32SizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode an - * enum field, including tag. Caller is responsible for converting the - * enum value to its numeric value. - */ - public static int computeEnumSize(final int fieldNumber, final int value) { - return computeTagSize(fieldNumber) + computeEnumSizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode an - * {@code sfixed32} field, including tag. - */ - public static int computeSFixed32Size(final int fieldNumber, - final int value) { - return computeTagSize(fieldNumber) + computeSFixed32SizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode an - * {@code sfixed64} field, including tag. - */ - public static int computeSFixed64Size(final int fieldNumber, - final long value) { - return computeTagSize(fieldNumber) + computeSFixed64SizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode an - * {@code sint32} field, including tag. - */ - public static int computeSInt32Size(final int fieldNumber, final int value) { - return computeTagSize(fieldNumber) + computeSInt32SizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode an - * {@code sint64} field, including tag. - */ - public static int computeSInt64Size(final int fieldNumber, final long value) { - return computeTagSize(fieldNumber) + computeSInt64SizeNoTag(value); - } - - /** - * Compute the number of bytes that would be needed to encode a - * MessageSet extension to the stream. For historical reasons, - * the wire format differs from normal fields. - */ -// public static int computeMessageSetExtensionSize( -// final int fieldNumber, final MessageMicro value) { -// return computeTagSize(WireFormatMicro.MESSAGE_SET_ITEM) * 2 + -// computeUInt32Size(WireFormatMicro.MESSAGE_SET_TYPE_ID, fieldNumber) + -// computeMessageSize(WireFormatMicro.MESSAGE_SET_MESSAGE, value); -// } - - /** - * Compute the number of bytes that would be needed to encode an - * unparsed MessageSet extension field to the stream. For - * historical reasons, the wire format differs from normal fields. - */ -// public static int computeRawMessageSetExtensionSize( -// final int fieldNumber, final ByteStringMicro value) { -// return computeTagSize(WireFormatMicro.MESSAGE_SET_ITEM) * 2 + -// computeUInt32Size(WireFormatMicro.MESSAGE_SET_TYPE_ID, fieldNumber) + -// computeBytesSize(WireFormatMicro.MESSAGE_SET_MESSAGE, value); -// } - - // ----------------------------------------------------------------- - - /** - * Compute the number of bytes that would be needed to encode a - * {@code double} field, including tag. - */ - public static int computeDoubleSizeNoTag(final double value) { - return LITTLE_ENDIAN_64_SIZE; - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code float} field, including tag. - */ - public static int computeFloatSizeNoTag(final float value) { - return LITTLE_ENDIAN_32_SIZE; - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code uint64} field, including tag. - */ - public static int computeUInt64SizeNoTag(final long value) { - return computeRawVarint64Size(value); - } - - /** - * Compute the number of bytes that would be needed to encode an - * {@code int64} field, including tag. - */ - public static int computeInt64SizeNoTag(final long value) { - return computeRawVarint64Size(value); - } - - /** - * Compute the number of bytes that would be needed to encode an - * {@code int32} field, including tag. - */ - public static int computeInt32SizeNoTag(final int value) { - if (value >= 0) { - return computeRawVarint32Size(value); - } else { - // Must sign-extend. - return 10; - } - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code fixed64} field. - */ - public static int computeFixed64SizeNoTag(final long value) { - return LITTLE_ENDIAN_64_SIZE; - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code fixed32} field. - */ - public static int computeFixed32SizeNoTag(final int value) { - return LITTLE_ENDIAN_32_SIZE; - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code bool} field. - */ - public static int computeBoolSizeNoTag(final boolean value) { - return 1; - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code string} field. - */ - public static int computeStringSizeNoTag(final String value) { - final int length = encodedLength(value); - return computeRawVarint32Size(length) + length; - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code group} field. - */ - public static int computeGroupSizeNoTag(final MessageNano value) { - return value.getSerializedSize(); - } - - /** - * Compute the number of bytes that would be needed to encode an embedded - * message field. - */ - public static int computeMessageSizeNoTag(final MessageNano value) { - final int size = value.getSerializedSize(); - return computeRawVarint32Size(size) + size; - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code bytes} field. - */ - public static int computeBytesSizeNoTag(final byte[] value) { - return computeRawVarint32Size(value.length) + value.length; - } - - /** - * Compute the number of bytes that would be needed to encode a - * {@code uint32} field. - */ - public static int computeUInt32SizeNoTag(final int value) { - return computeRawVarint32Size(value); - } - - /** - * Compute the number of bytes that would be needed to encode an enum field. - * Caller is responsible for converting the enum value to its numeric value. - */ - public static int computeEnumSizeNoTag(final int value) { - return computeRawVarint32Size(value); - } - - /** - * Compute the number of bytes that would be needed to encode an - * {@code sfixed32} field. - */ - public static int computeSFixed32SizeNoTag(final int value) { - return LITTLE_ENDIAN_32_SIZE; - } - - /** - * Compute the number of bytes that would be needed to encode an - * {@code sfixed64} field. - */ - public static int computeSFixed64SizeNoTag(final long value) { - return LITTLE_ENDIAN_64_SIZE; - } - - /** - * Compute the number of bytes that would be needed to encode an - * {@code sint32} field. - */ - public static int computeSInt32SizeNoTag(final int value) { - return computeRawVarint32Size(encodeZigZag32(value)); - } - - /** - * Compute the number of bytes that would be needed to encode an - * {@code sint64} field. - */ - public static int computeSInt64SizeNoTag(final long value) { - return computeRawVarint64Size(encodeZigZag64(value)); - } - - // ================================================================= - - /** - * If writing to a flat array, return the space left in the array. - * Otherwise, throws {@code UnsupportedOperationException}. - */ - public int spaceLeft() { - return buffer.remaining(); - } - - /** - * Verifies that {@link #spaceLeft()} returns zero. It's common to create - * a byte array that is exactly big enough to hold a message, then write to - * it with a {@code CodedOutputStream}. Calling {@code checkNoSpaceLeft()} - * after writing verifies that the message was actually as big as expected, - * which can help catch bugs. - */ - public void checkNoSpaceLeft() { - if (spaceLeft() != 0) { - throw new IllegalStateException( - "Did not write as much data as expected."); - } - } - - /** - * Returns the position within the internal buffer. - */ - public int position() { - return buffer.position(); - } - - /** - * Resets the position within the internal buffer to zero. - * - * @see #position - * @see #spaceLeft - */ - public void reset() { - buffer.clear(); - } - - /** - * If you create a CodedOutputStream around a simple flat array, you must - * not attempt to write more bytes than the array has space. Otherwise, - * this exception will be thrown. - */ - public static class OutOfSpaceException extends IOException { - private static final long serialVersionUID = -6947486886997889499L; - - OutOfSpaceException(int position, int limit) { - super("CodedOutputStream was writing to a flat byte array and ran " + - "out of space (pos " + position + " limit " + limit + ")."); - } - } - - /** Write a single byte. */ - public void writeRawByte(final byte value) throws IOException { - if (!buffer.hasRemaining()) { - // We're writing to a single buffer. - throw new OutOfSpaceException(buffer.position(), buffer.limit()); - } - - buffer.put(value); - } - - /** Write a single byte, represented by an integer value. */ - public void writeRawByte(final int value) throws IOException { - writeRawByte((byte) value); - } - - /** Write an array of bytes. */ - public void writeRawBytes(final byte[] value) throws IOException { - writeRawBytes(value, 0, value.length); - } - - /** Write part of an array of bytes. */ - public void writeRawBytes(final byte[] value, int offset, int length) - throws IOException { - if (buffer.remaining() >= length) { - buffer.put(value, offset, length); - } else { - // We're writing to a single buffer. - throw new OutOfSpaceException(buffer.position(), buffer.limit()); - } - } - - /** Encode and write a tag. */ - public void writeTag(final int fieldNumber, final int wireType) - throws IOException { - writeRawVarint32(WireFormatNano.makeTag(fieldNumber, wireType)); - } - - /** Compute the number of bytes that would be needed to encode a tag. */ - public static int computeTagSize(final int fieldNumber) { - return computeRawVarint32Size(WireFormatNano.makeTag(fieldNumber, 0)); - } - - /** - * Encode and write a varint. {@code value} is treated as - * unsigned, so it won't be sign-extended if negative. - */ - public void writeRawVarint32(int value) throws IOException { - while (true) { - if ((value & ~0x7F) == 0) { - writeRawByte(value); - return; - } else { - writeRawByte((value & 0x7F) | 0x80); - value >>>= 7; - } - } - } - - /** - * Compute the number of bytes that would be needed to encode a varint. - * {@code value} is treated as unsigned, so it won't be sign-extended if - * negative. - */ - public static int computeRawVarint32Size(final int value) { - if ((value & (0xffffffff << 7)) == 0) return 1; - if ((value & (0xffffffff << 14)) == 0) return 2; - if ((value & (0xffffffff << 21)) == 0) return 3; - if ((value & (0xffffffff << 28)) == 0) return 4; - return 5; - } - - /** Encode and write a varint. */ - public void writeRawVarint64(long value) throws IOException { - while (true) { - if ((value & ~0x7FL) == 0) { - writeRawByte((int)value); - return; - } else { - writeRawByte(((int)value & 0x7F) | 0x80); - value >>>= 7; - } - } - } - - /** Compute the number of bytes that would be needed to encode a varint. */ - public static int computeRawVarint64Size(final long value) { - if ((value & (0xffffffffffffffffL << 7)) == 0) return 1; - if ((value & (0xffffffffffffffffL << 14)) == 0) return 2; - if ((value & (0xffffffffffffffffL << 21)) == 0) return 3; - if ((value & (0xffffffffffffffffL << 28)) == 0) return 4; - if ((value & (0xffffffffffffffffL << 35)) == 0) return 5; - if ((value & (0xffffffffffffffffL << 42)) == 0) return 6; - if ((value & (0xffffffffffffffffL << 49)) == 0) return 7; - if ((value & (0xffffffffffffffffL << 56)) == 0) return 8; - if ((value & (0xffffffffffffffffL << 63)) == 0) return 9; - return 10; - } - - /** Write a little-endian 32-bit integer. */ - public void writeRawLittleEndian32(final int value) throws IOException { - if (buffer.remaining() < 4) { - throw new OutOfSpaceException(buffer.position(), buffer.limit()); - } - buffer.putInt(value); - } - - public static final int LITTLE_ENDIAN_32_SIZE = 4; - - /** Write a little-endian 64-bit integer. */ - public void writeRawLittleEndian64(final long value) throws IOException { - if (buffer.remaining() < 8) { - throw new OutOfSpaceException(buffer.position(), buffer.limit()); - } - buffer.putLong(value); - } - - public static final int LITTLE_ENDIAN_64_SIZE = 8; - - /** - * Encode 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 A signed 32-bit integer. - * @return An unsigned 32-bit integer, stored in a signed int because - * Java has no explicit unsigned support. - */ - public static int encodeZigZag32(final int n) { - // Note: the right-shift must be arithmetic - return (n << 1) ^ (n >> 31); - } - - /** - * Encode 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 A signed 64-bit integer. - * @return An unsigned 64-bit integer, stored in a signed int because - * Java has no explicit unsigned support. - */ - public static long encodeZigZag64(final long n) { - // Note: the right-shift must be arithmetic - return (n << 1) ^ (n >> 63); - } - - static int computeFieldSize(int number, int type, Object object) { - switch (type) { - case InternalNano.TYPE_BOOL: - return computeBoolSize(number, (Boolean) object); - case InternalNano.TYPE_BYTES: - return computeBytesSize(number, (byte[]) object); - case InternalNano.TYPE_STRING: - return computeStringSize(number, (String) object); - case InternalNano.TYPE_FLOAT: - return computeFloatSize(number, (Float) object); - case InternalNano.TYPE_DOUBLE: - return computeDoubleSize(number, (Double) object); - case InternalNano.TYPE_ENUM: - return computeEnumSize(number, (Integer) object); - case InternalNano.TYPE_FIXED32: - return computeFixed32Size(number, (Integer) object); - case InternalNano.TYPE_INT32: - return computeInt32Size(number, (Integer) object); - case InternalNano.TYPE_UINT32: - return computeUInt32Size(number, (Integer) object); - case InternalNano.TYPE_SINT32: - return computeSInt32Size(number, (Integer) object); - case InternalNano.TYPE_SFIXED32: - return computeSFixed32Size(number, (Integer) object); - case InternalNano.TYPE_INT64: - return computeInt64Size(number, (Long) object); - case InternalNano.TYPE_UINT64: - return computeUInt64Size(number, (Long) object); - case InternalNano.TYPE_SINT64: - return computeSInt64Size(number, (Long) object); - case InternalNano.TYPE_FIXED64: - return computeFixed64Size(number, (Long) object); - case InternalNano.TYPE_SFIXED64: - return computeSFixed64Size(number, (Long) object); - case InternalNano.TYPE_MESSAGE: - return computeMessageSize(number, (MessageNano) object); - case InternalNano.TYPE_GROUP: - return computeGroupSize(number, (MessageNano) object); - default: - throw new IllegalArgumentException("Unknown type: " + type); - } - } - - void writeField(int number, int type, Object value) - throws IOException { - switch (type) { - case InternalNano.TYPE_DOUBLE: - Double doubleValue = (Double) value; - writeDouble(number, doubleValue); - break; - case InternalNano.TYPE_FLOAT: - Float floatValue = (Float) value; - writeFloat(number, floatValue); - break; - case InternalNano.TYPE_INT64: - Long int64Value = (Long) value; - writeInt64(number, int64Value); - break; - case InternalNano.TYPE_UINT64: - Long uint64Value = (Long) value; - writeUInt64(number, uint64Value); - break; - case InternalNano.TYPE_INT32: - Integer int32Value = (Integer) value; - writeInt32(number, int32Value); - break; - case InternalNano.TYPE_FIXED64: - Long fixed64Value = (Long) value; - writeFixed64(number, fixed64Value); - break; - case InternalNano.TYPE_FIXED32: - Integer fixed32Value = (Integer) value; - writeFixed32(number, fixed32Value); - break; - case InternalNano.TYPE_BOOL: - Boolean boolValue = (Boolean) value; - writeBool(number, boolValue); - break; - case InternalNano.TYPE_STRING: - String stringValue = (String) value; - writeString(number, stringValue); - break; - case InternalNano.TYPE_BYTES: - byte[] bytesValue = (byte[]) value; - writeBytes(number, bytesValue); - break; - case InternalNano.TYPE_UINT32: - Integer uint32Value = (Integer) value; - writeUInt32(number, uint32Value); - break; - case InternalNano.TYPE_ENUM: - Integer enumValue = (Integer) value; - writeEnum(number, enumValue); - break; - case InternalNano.TYPE_SFIXED32: - Integer sfixed32Value = (Integer) value; - writeSFixed32(number, sfixed32Value); - break; - case InternalNano.TYPE_SFIXED64: - Long sfixed64Value = (Long) value; - writeSFixed64(number, sfixed64Value); - break; - case InternalNano.TYPE_SINT32: - Integer sint32Value = (Integer) value; - writeSInt32(number, sint32Value); - break; - case InternalNano.TYPE_SINT64: - Long sint64Value = (Long) value; - writeSInt64(number, sint64Value); - break; - case InternalNano.TYPE_MESSAGE: - MessageNano messageValue = (MessageNano) value; - writeMessage(number, messageValue); - break; - case InternalNano.TYPE_GROUP: - MessageNano groupValue = (MessageNano) value; - writeGroup(number, groupValue); - break; - default: - throw new IOException("Unknown type: " + type); - } - } - -} |