JsonCamelCaseNamingPolicy.cs

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namespace System.Text.Json;
 
internal sealed class JsonCamelCaseNamingPolicy : JsonNamingPolicy
{
    public override string ConvertName(string name)
    {
        if (string.IsNullOrEmpty(name) || !char.IsUpper(name[0]))
        {
            return name;
        }
        return string.Create(name.Length, name, delegate(Span<char> chars, string name)
        {
            name.CopyTo(chars);
            FixCasing(chars);
        });
    }
 
    private static void FixCasing(Span<char> chars)
    {
        for (int i = 0; i < chars.Length && (i != 1 || char.IsUpper(chars[i])); i++)
        {
            bool flag = i + 1 < chars.Length;
            if (i > 0 && flag && !char.IsUpper(chars[i + 1]))
            {
                if (chars[i + 1] == ' ')
                {
                    chars[i] = char.ToLowerInvariant(chars[i]);
                }
                break;
            }
            chars[i] = char.ToLowerInvariant(chars[i]);
        }
    }
}