#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));
}
}
}