/// <summary>
/// Retrieves a codec suitable for an sint32 field with the given tag.
/// </summary>
/// <param name="tag">The tag.</param>
/// <returns>A codec for the given tag.</returns>
public static FieldCodec <int> ForSInt32(uint tag)
{
return(FieldCodec.ForSInt32(tag, 0));
}
internal static int CalculateSize <T>(T value, FieldCodec <T> codec)
{
int fieldLength = codec.CalculateSizeWithTag(value);
return(CodedOutputStream.ComputeLengthSize(fieldLength) + fieldLength);
}
/// <summary>
/// Retrieves a codec suitable for a bool field with the given tag.
/// </summary>
/// <param name="tag">The tag.</param>
/// <returns>A codec for the given tag.</returns>
public static FieldCodec <bool> ForBool(uint tag)
{
return(FieldCodec.ForBool(tag, false));
}
internal static void Write <T>(ref WriteContext ctx, T value, FieldCodec <T> codec)
{
ctx.WriteLength(codec.CalculateSizeWithTag(value));
codec.WriteTagAndValue(ref ctx, value);
}
/// <summary>
/// Retrieves a codec suitable for a bytes field with the given tag.
/// </summary>
/// <param name="tag">The tag.</param>
/// <returns>A codec for the given tag.</returns>
public static FieldCodec <ByteString> ForBytes(uint tag)
{
return(FieldCodec.ForBytes(tag, ByteString.Empty));
}
// Enums are tricky. We can probably use expression trees to build these delegates automatically,
// but it's easy to generate the code for it.
/// <summary>
/// Retrieves a codec suitable for an enum field with the given tag.
/// </summary>
/// <param name="tag">The tag.</param>
/// <param name="toInt32">A conversion function from <see cref="Int32"/> to the enum type.</param>
/// <param name="fromInt32">A conversion function from the enum type to <see cref="Int32"/>.</param>
/// <returns>A codec for the given tag.</returns>
public static FieldCodec <T> ForEnum <T>(uint tag, Func <T, int> toInt32, Func <int, T> fromInt32)
{
return(FieldCodec.ForEnum(tag, toInt32, fromInt32, default(T)));
}
// TODO: Avoid the "dual hit" of lambda expressions: create open delegates instead. (At least test...)
/// <summary>
/// Retrieves a codec suitable for a string field with the given tag.
/// </summary>
/// <param name="tag">The tag.</param>
/// <returns>A codec for the given tag.</returns>
public static FieldCodec <string> ForString(uint tag)
{
return(FieldCodec.ForString(tag, ""));
}
/// <summary>
/// Retrieves a codec suitable for a double field with the given tag.
/// </summary>
/// <param name="tag">The tag.</param>
/// <returns>A codec for the given tag.</returns>
public static FieldCodec <double> ForDouble(uint tag)
{
return(FieldCodec.ForDouble(tag, 0));
}
/// <summary>
/// Retrieves a codec suitable for a float field with the given tag.
/// </summary>
/// <param name="tag">The tag.</param>
/// <returns>A codec for the given tag.</returns>
public static FieldCodec <float> ForFloat(uint tag)
{
return(FieldCodec.ForFloat(tag, 0));
}
/// <summary>
/// Retrieves a codec suitable for a uint64 field with the given tag.
/// </summary>
/// <param name="tag">The tag.</param>
/// <returns>A codec for the given tag.</returns>
public static FieldCodec <ulong> ForUInt64(uint tag)
{
return(FieldCodec.ForUInt64(tag, 0));
}
/// <summary>
/// Retrieves a codec suitable for an sfixed64 field with the given tag.
/// </summary>
/// <param name="tag">The tag.</param>
/// <returns>A codec for the given tag.</returns>
public static FieldCodec <long> ForSFixed64(uint tag)
{
return(FieldCodec.ForSFixed64(tag, 0));
}
/// <summary>
/// Retrieves a codec suitable for a fixed32 field with the given tag.
/// </summary>
/// <param name="tag">The tag.</param>
/// <returns>A codec for the given tag.</returns>
public static FieldCodec <uint> ForFixed32(uint tag)
{
return(FieldCodec.ForFixed32(tag, 0));
}