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- #region Copyright notice and license
- // 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.
- #endregion
- using System;
- namespace Google.Protobuf
- {
- // This part of CodedOutputStream provides all the static entry points that are used
- // by generated code and internally to compute the size of messages prior to being
- // written to an instance of CodedOutputStream.
- public sealed partial class CodedOutputStream
- {
- private const int LittleEndian64Size = 8;
- private const int LittleEndian32Size = 4;
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a
- /// double field, including the tag.
- /// </summary>
- public static int ComputeDoubleSize(double value)
- {
- return LittleEndian64Size;
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a
- /// float field, including the tag.
- /// </summary>
- public static int ComputeFloatSize(float value)
- {
- return LittleEndian32Size;
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a
- /// uint64 field, including the tag.
- /// </summary>
- public static int ComputeUInt64Size(ulong value)
- {
- return ComputeRawVarint64Size(value);
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode an
- /// int64 field, including the tag.
- /// </summary>
- public static int ComputeInt64Size(long value)
- {
- return ComputeRawVarint64Size((ulong) value);
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode an
- /// int32 field, including the tag.
- /// </summary>
- public static int ComputeInt32Size(int value)
- {
- if (value >= 0)
- {
- return ComputeRawVarint32Size((uint) value);
- }
- else
- {
- // Must sign-extend.
- return 10;
- }
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a
- /// fixed64 field, including the tag.
- /// </summary>
- public static int ComputeFixed64Size(ulong value)
- {
- return LittleEndian64Size;
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a
- /// fixed32 field, including the tag.
- /// </summary>
- public static int ComputeFixed32Size(uint value)
- {
- return LittleEndian32Size;
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a
- /// bool field, including the tag.
- /// </summary>
- public static int ComputeBoolSize(bool value)
- {
- return 1;
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a
- /// string field, including the tag.
- /// </summary>
- public static int ComputeStringSize(String value)
- {
- int byteArraySize = Utf8Encoding.GetByteCount(value);
- return ComputeLengthSize(byteArraySize) + byteArraySize;
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a
- /// group field, including the tag.
- /// </summary>
- public static int ComputeGroupSize(IMessage value)
- {
- return value.CalculateSize();
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode an
- /// embedded message field, including the tag.
- /// </summary>
- public static int ComputeMessageSize(IMessage value)
- {
- int size = value.CalculateSize();
- return ComputeLengthSize(size) + size;
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a
- /// bytes field, including the tag.
- /// </summary>
- public static int ComputeBytesSize(ByteString value)
- {
- return ComputeLengthSize(value.Length) + value.Length;
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a
- /// uint32 field, including the tag.
- /// </summary>
- public static int ComputeUInt32Size(uint value)
- {
- return ComputeRawVarint32Size(value);
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a
- /// enum field, including the tag. The caller is responsible for
- /// converting the enum value to its numeric value.
- /// </summary>
- public static int ComputeEnumSize(int value)
- {
- // Currently just a pass-through, but it's nice to separate it logically.
- return ComputeInt32Size(value);
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode an
- /// sfixed32 field, including the tag.
- /// </summary>
- public static int ComputeSFixed32Size(int value)
- {
- return LittleEndian32Size;
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode an
- /// sfixed64 field, including the tag.
- /// </summary>
- public static int ComputeSFixed64Size(long value)
- {
- return LittleEndian64Size;
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode an
- /// sint32 field, including the tag.
- /// </summary>
- public static int ComputeSInt32Size(int value)
- {
- return ComputeRawVarint32Size(EncodeZigZag32(value));
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode an
- /// sint64 field, including the tag.
- /// </summary>
- public static int ComputeSInt64Size(long value)
- {
- return ComputeRawVarint64Size(EncodeZigZag64(value));
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a length,
- /// as written by <see cref="WriteLength"/>.
- /// </summary>
- public static int ComputeLengthSize(int length)
- {
- return ComputeRawVarint32Size((uint) length);
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a varint.
- /// </summary>
- public static int ComputeRawVarint32Size(uint 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;
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a varint.
- /// </summary>
- public static int ComputeRawVarint64Size(ulong 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;
- }
- /// <summary>
- /// Computes the number of bytes that would be needed to encode a tag.
- /// </summary>
- public static int ComputeTagSize(int fieldNumber)
- {
- return ComputeRawVarint32Size(WireFormat.MakeTag(fieldNumber, 0));
- }
- }
- }
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