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Add length checks to ExtensionCollection #6759

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merged 1 commit into from Oct 22, 2019
Merged

Add length checks to ExtensionCollection #6759

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22 changes: 20 additions & 2 deletions csharp/src/Google.Protobuf/Reflection/ExtensionCollection.cs
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Expand Up @@ -48,14 +48,32 @@ internal ExtensionCollection(FileDescriptor file, Extension[] extensions)
{
UnorderedExtensions = DescriptorUtil.ConvertAndMakeReadOnly(
file.Proto.Extension,
(extension, i) => new FieldDescriptor(extension, file, null, i, null, extensions?[i]));
(extension, i) => {
if (extensions?.Length != 0)
{
return new FieldDescriptor(extension, file, null, i, null, extensions?[i]);
}
else
{
return new FieldDescriptor(extension, file, null, i, null, null); // return null if there's no extensions in this array for old code-gen
}
});
}

internal ExtensionCollection(MessageDescriptor message, Extension[] extensions)
{
UnorderedExtensions = DescriptorUtil.ConvertAndMakeReadOnly(
message.Proto.Extension,
(extension, i) => new FieldDescriptor(extension, message.File, message, i, null, extensions?[i]));
(extension, i) => {
if (extensions?.Length != 0)
{
return new FieldDescriptor(extension, message.File, message, i, null, extensions?[i]);
}
else
{
return new FieldDescriptor(extension, message.File, message, i, null, null);
}
});
}

/// <summary>
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