using System.Buffers.Text; using System.Text.Json.Schema; namespace System.Text.Json.Serialization.Converters { internal sealed class TimeSpanConverter : JsonPrimitiveConverter<TimeSpan> { private const int MinimumTimeSpanFormatLength = 1; private const int MaximumTimeSpanFormatLength = 26; private const int MaximumEscapedTimeSpanFormatLength = 156; public override TimeSpan Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) { if (reader.TokenType != JsonTokenType.String) ThrowHelper.ThrowInvalidOperationException_ExpectedString(reader.TokenType); return ReadCore(ref reader); } internal override TimeSpan ReadAsPropertyNameCore(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) { return ReadCore(ref reader); } private unsafe static TimeSpan ReadCore(ref Utf8JsonReader reader) { if (!JsonHelpers.IsInRangeInclusive(reader.ValueLength, 1, 156)) ThrowHelper.ThrowFormatException(DataType.TimeSpan); ReadOnlySpan<byte> source; if (!reader.HasValueSequence && !reader.ValueIsEscaped) source = reader.ValueSpan; else { Span<byte> utf8Destination = new Span<byte>(stackalloc byte[156], 156); int length = reader.CopyString(utf8Destination); source = utf8Destination.Slice(0, length); } byte b = source[0]; if (!JsonHelpers.IsDigit(b) && b != 45) ThrowHelper.ThrowFormatException(DataType.TimeSpan); if (!Utf8Parser.TryParse(source, out TimeSpan value, out int bytesConsumed, 'c') || source.Length != bytesConsumed) ThrowHelper.ThrowFormatException(DataType.TimeSpan); return value; } public unsafe override void Write(Utf8JsonWriter writer, TimeSpan value, JsonSerializerOptions options) { Span<byte> destination = new Span<byte>(stackalloc byte[26], 26); Utf8Formatter.TryFormat(value, destination, out int bytesWritten, 'c'); writer.WriteStringValue(destination.Slice(0, bytesWritten)); } internal unsafe override void WriteAsPropertyNameCore(Utf8JsonWriter writer, TimeSpan value, JsonSerializerOptions options, bool isWritingExtensionDataProperty) { Span<byte> destination = new Span<byte>(stackalloc byte[26], 26); Utf8Formatter.TryFormat(value, destination, out int bytesWritten, 'c'); writer.WritePropertyName(destination.Slice(0, bytesWritten)); } internal override JsonSchema GetSchema(JsonNumberHandling _) { return new JsonSchema { Type = JsonSchemaType.String, Comment = "Represents a System.TimeSpan value.", Pattern = "^-?(\\d+\\.)?\\d{2}:\\d{2}:\\d{2}(\\.\\d{1,7})?$" }; } } }