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using System;
using System.Buffers;
using System.Buffers.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
namespace MediaBrowser.Common.Json.Converters
{
/// <summary>
/// Converts a GUID object or value to/from JSON.
/// </summary>
public class JsonInt32Converter : JsonConverter<int>
{
/// <inheritdoc />
public override int Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
static void ThrowFormatException() => throw new FormatException("Invalid format for an integer.");
ReadOnlySpan<byte> span = stackalloc byte[0];
if (reader.HasValueSequence)
{
long sequenceLength = reader.ValueSequence.Length;
Span<byte> stackSpan = stackalloc byte[(int)sequenceLength];
reader.ValueSequence.CopyTo(stackSpan);
span = stackSpan;
}
else
{
span = reader.ValueSpan;
}
if (!Utf8Parser.TryParse(span, out int number, out _))
{
ThrowFormatException();
}
return number;
}
/// <inheritdoc />
public override void Write(Utf8JsonWriter writer, int value, JsonSerializerOptions options)
{
static void ThrowInvalidOperationException() => throw new InvalidOperationException();
Span<byte> span = stackalloc byte[16];
if (Utf8Formatter.TryFormat(value, span, out int bytesWritten))
{
writer.WriteStringValue(span.Slice(0, bytesWritten));
}
ThrowInvalidOperationException();
}
}
}
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