using System.Buffers; using System.Buffers.Text; namespace System.Text.Json.Serialization.Converters { internal sealed class TimeSpanConverter : JsonConverter<TimeSpan> { private const int MinimumTimeSpanFormatLength = 8; private const int MaximumTimeSpanFormatLength = 26; private const int MaximumEscapedTimeSpanFormatLength = 156; public unsafe override TimeSpan Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) { if (reader.TokenType != JsonTokenType.String) throw ThrowHelper.GetInvalidOperationException_ExpectedString(reader.TokenType); bool stringHasEscaping = reader._stringHasEscaping; int num = stringHasEscaping ? 156 : 26; ReadOnlySpan<byte> readOnlySpan = default(Span<byte>); if (reader.HasValueSequence) { ReadOnlySequence<byte> source = reader.ValueSequence; long length = source.Length; if (!JsonHelpers.IsInRangeInclusive(length, 8, num)) throw ThrowHelper.GetFormatException(DataType.TimeSpan); int num2 = stringHasEscaping ? 156 : 26; Span<byte> span = new Span<byte>(stackalloc byte[(int)(uint)num2], num2); Span<byte> destination = span; ref source.CopyTo(destination); readOnlySpan = destination.Slice(0, (int)length); } else { readOnlySpan = reader.ValueSpan; if (!JsonHelpers.IsInRangeInclusive(readOnlySpan.Length, 8, num)) throw ThrowHelper.GetFormatException(DataType.TimeSpan); } if (stringHasEscaping) { int idx = readOnlySpan.IndexOf<byte>(92); Span<byte> span = new Span<byte>(stackalloc byte[156], 156); Span<byte> destination2 = span; JsonReaderHelper.Unescape(readOnlySpan, destination2, idx, out int written); readOnlySpan = destination2.Slice(0, written); } byte b = readOnlySpan[0]; if (!JsonHelpers.IsDigit(b) && b != 45) throw ThrowHelper.GetFormatException(DataType.TimeSpan); if (Utf8Parser.TryParse(readOnlySpan, out TimeSpan value, out int bytesConsumed, 'c') && readOnlySpan.Length == bytesConsumed) return value; throw ThrowHelper.GetFormatException(DataType.TimeSpan); } public unsafe override void Write(Utf8JsonWriter writer, TimeSpan value, JsonSerializerOptions options) { Span<byte> span = new Span<byte>(stackalloc byte[26], 26); Span<byte> destination = span; int bytesWritten; bool flag = Utf8Formatter.TryFormat(value, destination, out bytesWritten, 'c'); writer.WriteStringValue(destination.Slice(0, bytesWritten)); } } }