/// <summary>
/// Parses the current JSON token value from the source as a <see cref="DateTimeOffset"/>.
/// Returns <see langword="true"/> if the entire UTF-8 encoded token value can be successfully
/// parsed to a <see cref="DateTimeOffset"/> value.
/// Returns <see langword="false"/> otherwise.
/// </summary>
/// <exception cref="InvalidOperationException">
/// Thrown if trying to get the value of a JSON token that is not a <see cref="JsonTokenType.String"/>.
/// <seealso cref="TokenType" />
/// </exception>
public bool TryGetDateTimeOffset(out DateTimeOffset value)
{
if (TokenType != JsonTokenType.String)
{
throw ThrowHelper.GetInvalidOperationException_ExpectedString(TokenType);
}
ReadOnlySpan <byte> span = stackalloc byte[0];
if (HasValueSequence)
{
long sequenceLength = ValueSequence.Length;
if (!JsonReaderHelper.IsValidDateTimeOffsetParseLength(sequenceLength))
{
value = default;
return(false);
}
Debug.Assert(sequenceLength <= JsonConstants.MaximumEscapedDateTimeOffsetParseLength);
Span <byte> stackSpan = stackalloc byte[(int)sequenceLength];
ValueSequence.CopyTo(stackSpan);
span = stackSpan;
}
else
{
if (!JsonReaderHelper.IsValidDateTimeOffsetParseLength(ValueSpan.Length))
{
value = default;
return(false);
}
span = ValueSpan;
}
if (_stringHasEscaping)
{
return(JsonReaderHelper.TryGetEscapedDateTimeOffset(span, out value));
}
Debug.Assert(span.IndexOf(JsonConstants.BackSlash) == -1);
if (span.Length <= JsonConstants.MaximumDateTimeOffsetParseLength &&
JsonHelpers.TryParseAsISO(span, out DateTimeOffset tmp, out int bytesConsumed) &&
span.Length == bytesConsumed)
{
value = tmp;
return(true);
}
value = default;
return(false);
}
/// <summary>
/// Parses the current JSON token value from the source as a <see cref="Guid"/>.
/// Returns <see langword="true"/> if the entire UTF-8 encoded token value can be successfully
/// parsed to a <see cref="Guid"/> value. Only supports <see cref="Guid"/> values with hyphens
/// and without any surrounding decorations.
/// Returns <see langword="false"/> otherwise.
/// </summary>
/// <exception cref="InvalidOperationException">
/// Thrown if trying to get the value of a JSON token that is not a <see cref="JsonTokenType.String"/>.
/// <seealso cref="TokenType" />
/// </exception>
public bool TryGetGuid(out Guid value)
{
if (TokenType != JsonTokenType.String)
{
throw ThrowHelper.GetInvalidOperationException_ExpectedString(TokenType);
}
ReadOnlySpan <byte> span = stackalloc byte[0];
if (HasValueSequence)
{
long sequenceLength = ValueSequence.Length;
if (sequenceLength > JsonConstants.MaximumEscapedGuidLength)
{
value = default;
return(false);
}
Debug.Assert(sequenceLength <= JsonConstants.MaximumEscapedGuidLength);
Span <byte> stackSpan = stackalloc byte[(int)sequenceLength];
ValueSequence.CopyTo(stackSpan);
span = stackSpan;
}
else
{
if (ValueSpan.Length > JsonConstants.MaximumEscapedGuidLength)
{
value = default;
return(false);
}
span = ValueSpan;
}
if (_stringHasEscaping)
{
return(JsonReaderHelper.TryGetEscapedGuid(span, out value));
}
Debug.Assert(span.IndexOf(JsonConstants.BackSlash) == -1);
if (span.Length == JsonConstants.MaximumFormatGuidLength &&
Utf8Parser.TryParse(span, out Guid tmp, out _, 'D'))
{
value = tmp;
return(true);
}
value = default;
return(false);
}
/// <summary>
/// Reads the next JSON token value from the source and parses it to a <see cref="Guid"/>.
/// Returns <see langword="true"/> if the entire UTF-8 encoded token value can be successfully
/// parsed to a <see cref="Guid"/> value. Only supports <see cref="Guid"/> values with hyphens
/// and without any surrounding decorations.
/// Returns <see langword="false"/> otherwise.
/// </summary>
/// <exception cref="InvalidOperationException">
/// Thrown if trying to get the value of a JSON token that is not a <see cref="JsonTokenType.String"/>.
/// <seealso cref="TokenType" />
/// </exception>
public bool TryGetGuid(out Guid value)
{
if (TokenType != JsonTokenType.String)
{
throw ThrowHelper.GetInvalidOperationException_ExpectedString(TokenType);
}
ReadOnlySpan <byte> span = ValueSpan;
Span <byte> stackSpan;
if (HasValueSequence)
{
long sequenceLength = ValueSequence.Length;
if (sequenceLength > JsonConstants.MaximumEscapedGuidLength)
{
value = default;
return(false);
}
// Cannot create a span directly since it gets passed to instance methods on a ref struct.
unsafe
{
byte *ptr = stackalloc byte[(int)sequenceLength];
stackSpan = new Span <byte>(ptr, (int)sequenceLength);
}
ValueSequence.CopyTo(stackSpan);
span = stackSpan;
}
if (span.Length > JsonConstants.MaximumEscapedGuidLength)
{
value = default;
return(false);
}
if (_stringHasEscaping)
{
return(JsonReaderHelper.TryGetEscapedGuid(span, out value));
}
Debug.Assert(span.IndexOf(JsonConstants.BackSlash) == -1);
if (span.Length != JsonConstants.MaximumFormatGuidLength)
{
value = default;
return(false);
}
return(Utf8Parser.TryParse(span, out value, out int bytesConsumed) && span.Length == bytesConsumed);
}
internal bool TryGetGuidCore(out Guid value)
{
ReadOnlySpan <byte> span = stackalloc byte[0];
int maximumLength = _stringHasEscaping ? JsonConstants.MaximumEscapedGuidLength : JsonConstants.MaximumFormatGuidLength;
if (HasValueSequence)
{
long sequenceLength = ValueSequence.Length;
if (sequenceLength > maximumLength)
{
value = default;
return(false);
}
Debug.Assert(sequenceLength <= JsonConstants.MaximumEscapedGuidLength);
Span <byte> stackSpan = stackalloc byte[_stringHasEscaping ? JsonConstants.MaximumEscapedGuidLength : JsonConstants.MaximumFormatGuidLength];
ValueSequence.CopyTo(stackSpan);
span = stackSpan.Slice(0, (int)sequenceLength);
}
else
{
if (ValueSpan.Length > maximumLength)
{
value = default;
return(false);
}
span = ValueSpan;
}
if (_stringHasEscaping)
{
return(JsonReaderHelper.TryGetEscapedGuid(span, out value));
}
Debug.Assert(span.IndexOf(JsonConstants.BackSlash) == -1);
if (span.Length == JsonConstants.MaximumFormatGuidLength &&
Utf8Parser.TryParse(span, out Guid tmp, out _, 'D'))
{
value = tmp;
return(true);
}
value = default;
return(false);
}
internal bool TryGetDateTimeOffsetCore(out DateTimeOffset value)
{
ReadOnlySpan <byte> span = stackalloc byte[0];
if (HasValueSequence)
{
long sequenceLength = ValueSequence.Length;
if (!JsonHelpers.IsValidDateTimeOffsetParseLength(sequenceLength))
{
value = default;
return(false);
}
Debug.Assert(sequenceLength <= JsonConstants.MaximumEscapedDateTimeOffsetParseLength);
Span <byte> stackSpan = stackalloc byte[(int)sequenceLength];
ValueSequence.CopyTo(stackSpan);
span = stackSpan;
}
else
{
if (!JsonHelpers.IsValidDateTimeOffsetParseLength(ValueSpan.Length))
{
value = default;
return(false);
}
span = ValueSpan;
}
if (_stringHasEscaping)
{
return(JsonReaderHelper.TryGetEscapedDateTimeOffset(span, out value));
}
Debug.Assert(span.IndexOf(JsonConstants.BackSlash) == -1);
if (JsonHelpers.TryParseAsISO(span, out DateTimeOffset tmp))
{
value = tmp;
return(true);
}
value = default;
return(false);
}
