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Skip serializing structs if default value #3

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Skip serializing structs if default value #3

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8b2de9a
Skip serialization of optional fields set to their default value
Jake-Rich May 31, 2024
2c5f5f3
Also exclude serializing default value of required fields
Jake-Rich May 31, 2024
1f15044
Add support for all default values, fix optional field checks applyin…
Jake-Rich Jun 18, 2024
ffc4649
Make sure existing null checks aren't applied on top of new default v…
Jake-Rich Jun 18, 2024
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60 changes: 58 additions & 2 deletions CodeGenerator/CodeGenerator/FieldSerializer.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -271,6 +271,23 @@ static void BytesWriter(Field f, string stream, CodeWriter cw)
cw.WriteLine(stream + ".Write(msField.GetBuffer(), 0, (int)length" + f.ID + ");");
}

private static void WriteOptionalFieldCheck( CodeWriter cw, Field f )
{
// Support fields with custom default values
string defaultString = f.OptionDefault ?? "default";

// For some reason Ray isn't comparible so just check it's fields
if (f.ProtoTypeName == "Ray")
{
cw.IfBracket( $"instance.{f.CsName}.origin != default && instance.{f.CsName}.direction != default" );
}
Comment on lines +279 to +283
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Were all the other Unity types in Common.proto tested? This could be generated rather than hard coded since all that info is there.

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Double check that it builds cause I got some random compile error trying to check if jobHandle == default. Only when building - not in the editor.

else
{
// Normally compare to default
cw.IfBracket( $"instance.{f.CsName} != {defaultString}" );
}
}

/// <summary>
/// Generates code for writing one field
/// </summary>
Expand All @@ -285,6 +302,9 @@ public static void FieldWriter(ProtoMessage m, Field f, CodeWriter cw, bool hasP
if ( f.ProtoType.ProtoName == ProtoBuiltin.UInt64 ) canDelta = true;
if ( f.ProtoType.ProtoName == ProtoBuiltin.Double ) canDelta = true;

// Don't change behavior of SerializeDelta() calls
bool canOptional = !hasPrevious;

if (f.Rule == FieldRule.Repeated)
{
if (f.OptionPacked == true)
Expand Down Expand Up @@ -341,12 +361,20 @@ public static void FieldWriter(ProtoMessage m, Field f, CodeWriter cw, bool hasP
{
if (f.ProtoType.Nullable) //Struct always exist, not optional
{
// Manual null checks above = don't do default value checks
canOptional = false;

if (f.ProtoType.ProtoName == ProtoBuiltin.Bytes && f.OptionPooled)
cw.IfBracket("instance." + f.CsName + ".Array != null");
else
cw.IfBracket("instance." + f.CsName + " != null");
}

if (canOptional)
{
WriteOptionalFieldCheck( cw, f );
}

if ( hasPrevious && canDelta )
cw.IfBracket( "instance." + f.CsName + " != previous." + f.CsName );

Expand All @@ -357,51 +385,79 @@ public static void FieldWriter(ProtoMessage m, Field f, CodeWriter cw, bool hasP

if ( hasPrevious && canDelta )
cw.EndBracket();

if (canOptional)
cw.EndBracket();
return;
}
if (f.ProtoType is ProtoEnum)
{
if (f.OptionDefault != null)
cw.IfBracket("instance." + f.CsName + " != " + f.ProtoType.CsType + "." + f.OptionDefault);
if ( canOptional)
{
WriteOptionalFieldCheck( cw, f );
}
KeyWriter("stream", f.ID, f.ProtoType.WireType, cw);
cw.WriteLine(FieldWriterType(f, "stream", "bw", "instance." + f.CsName, hasPrevious ) );
if (f.OptionDefault != null)
cw.EndBracket();
if (canOptional)
cw.EndBracket();
return;
}

if ( hasPrevious && canDelta )
cw.IfBracket( "instance." + f.CsName + " != previous." + f.CsName );

if ( canOptional)
{
WriteOptionalFieldCheck( cw, f );
}

KeyWriter("stream", f.ID, f.ProtoType.WireType, cw);
cw.WriteLine(FieldWriterType(f, "stream", "bw", "instance." + f.CsName, hasPrevious ) );

if ( hasPrevious && canDelta )
if ( hasPrevious && canDelta )
cw.EndBracket();
if (canOptional)
cw.EndBracket();
return;
}
else if (f.Rule == FieldRule.Required)
{
if ( hasPrevious && canDelta )
if ( hasPrevious && canDelta )
cw.IfBracket( "instance." + f.CsName + " != previous." + f.CsName );

if (f.ProtoType is ProtoMessage && f.ProtoType.OptionType != "struct" ||
f.ProtoType.ProtoName == ProtoBuiltin.String ||
f.ProtoType.ProtoName == ProtoBuiltin.Bytes)
{
// Don't do extra optional checks if it's trying to throw an error
canOptional = false;

if (f.ProtoType.ProtoName == ProtoBuiltin.Bytes && f.OptionPooled)
cw.WriteLine("if (instance." + f.CsName + ".Array == null)");
else
cw.WriteLine("if (instance." + f.CsName + " == null)");

cw.WriteIndent("throw new ArgumentNullException(\"" + f.CsName + "\", \"Required by proto specification.\");");
}

// Skip default values of fields
if ( canOptional)
{
WriteOptionalFieldCheck( cw, f );
}
KeyWriter("stream", f.ID, f.ProtoType.WireType, cw);
cw.WriteLine(FieldWriterType(f, "stream", "bw", "instance." + f.CsName, hasPrevious ) );

if ( hasPrevious && canDelta )
cw.EndBracket();

if ( canOptional )
cw.EndBracket();

return;
}
throw new NotImplementedException("Unknown rule: " + f.Rule);
Expand Down