private void ReadNumberToken(byte firstCode)
{
int start = _position;
byte code = firstCode;
var isFloat = false;
if (code == GraphQLConstants.Minus)
{
code = _graphQLData[++_position];
}
if (code == GraphQLConstants.Zero && !IsEndOfStream(_position + 1))
{
code = _graphQLData[++_position];
if (GraphQLConstants.IsDigit(code))
{
throw new SyntaxException(this,
"Invalid number, unexpected digit after 0: " +
$"`{(char)code}` ({code}).");
}
}
else
{
code = ReadDigits(code);
}
if (code == GraphQLConstants.Dot)
{
isFloat = true;
_floatFormat = Language.FloatFormat.FixedPoint;
code = _graphQLData[++_position];
code = ReadDigits(code);
}
if ((code | 0x20) == GraphQLConstants.E)
{
isFloat = true;
_floatFormat = Language.FloatFormat.Exponential;
code = _graphQLData[++_position];
if (code == GraphQLConstants.Plus ||
code == GraphQLConstants.Minus)
{
code = _graphQLData[++_position];
}
ReadDigits(code);
}
_kind = isFloat ? TokenKind.Float : TokenKind.Integer;
_start = start;
_end = _position;
_value = _graphQLData.Slice(start, _position - start);
}
private void ReadNumberToken(byte firstCode)
{
var start = _position;
var code = firstCode;
var isFloat = false;
if (code is GraphQLConstants.Minus)
{
code = _graphQLData[++_position];
}
if (code is GraphQLConstants.Zero && !IsEndOfStream(_position + 1))
{
code = _graphQLData[++_position];
if (code.IsDigit())
{
throw new SyntaxException(this, UnexpectedDigit, (char)code, code);
}
}
else
{
code = ReadDigits(code);
}
if (code is GraphQLConstants.Dot)
{
isFloat = true;
_floatFormat = Language.FloatFormat.FixedPoint;
code = _graphQLData[++_position];
code = ReadDigits(code);
}
if ((code | 0x20) is GraphQLConstants.E)
{
isFloat = true;
_floatFormat = Language.FloatFormat.Exponential;
code = _graphQLData[++_position];
if (code is GraphQLConstants.Plus or GraphQLConstants.Minus)
{
code = _graphQLData[++_position];
}
ReadDigits(code);
}
_kind = isFloat ? TokenKind.Float : TokenKind.Integer;
_start = start;
_end = _position;
_value = _graphQLData.Slice(start, _position - start);
}
public Utf8GraphQLReader(ReadOnlySpan <byte> graphQLData)
{
_kind = TokenKind.StartOfFile;
_start = 0;
_end = 0;
_lineStart = 0;
_line = 1;
_column = 1;
_graphQLData = graphQLData;
_length = graphQLData.Length;
_nextNewLines = 0;
_position = 0;
_value = null;
_floatFormat = null;
}
private IValueNode ParseScalarValue()
{
if (TokenHelper.IsString(in _reader))
{
return(ParseStringLiteral());
}
TokenInfo start = Start();
TokenKind kind = _reader.Kind;
if (!TokenHelper.IsScalarValue(in _reader))
{
throw new SyntaxException(_reader,
string.Format(CultureInfo.InvariantCulture,
LangResources.Parser_InvalidScalarToken,
_reader.Kind));
}
ReadOnlyMemory <byte> value = _reader.Value.ToArray();
FloatFormat? format = _reader.FloatFormat;
MoveNext();
Location?location = CreateLocation(in start);
if (kind == TokenKind.Float)
{
return(new FloatValueNode
(
location,
value,
format ?? FloatFormat.FixedPoint
));
}
if (kind == TokenKind.Integer)
{
return(new IntValueNode
(
location,
value
));
}
throw Unexpected(kind);
}
public Utf8GraphQLReader(ReadOnlySpan <byte> graphQLData)
{
if (graphQLData.Length == 0)
{
throw new ArgumentException("The graphQLData is empty.", nameof(graphQLData));
}
_kind = TokenKind.StartOfFile;
_start = 0;
_end = 0;
_lineStart = 0;
_line = 1;
_column = 1;
_graphQLData = graphQLData;
_length = graphQLData.Length;
_nextNewLines = 0;
_position = 0;
_value = null;
_floatFormat = null;
}
public StringGraphQLReader(ReadOnlySpan <char> graphQLData)
{
if (graphQLData.Length == 0)
{
throw new ArgumentException("The graphQLData is empty.", nameof(graphQLData));
}
_kind = TokenKind.StartOfFile;
_start = 0;
_end = 0;
_lineStart = 0;
_line = 1;
_column = 1;
_token = new SyntaxToken(TokenKind.StartOfFile, 0, 0, 1, 1, null, null);
_graphQLData = graphQLData;
_length = graphQLData.Length;
_nextNewLines = 0;
_position = 0;
_value = null;
_floatFormat = null;
}
private unsafe IValueNode ParseNonStringScalarValue()
{
ISyntaxToken start = _reader.Token;
TokenKind kind = _reader.Kind;
fixed(char *c = _reader.Value)
{
string value = new string(c, 0, _reader.Value.Length);
FloatFormat?format = _reader.FloatFormat;
MoveNext();
var location = new Location(start, _reader.Token);
if (kind == TokenKind.Float)
{
return(new FloatValueNode
(
location,
value,
format ?? FloatFormat.FixedPoint
));
}
if (kind == TokenKind.Integer)
{
return(new IntValueNode
(
location,
value
));
}
throw Unexpected(kind);
}
}
public bool Read()
{
_floatFormat = null;
if (_position == 0)
{
SkipBoml();
}
SkipWhitespaces();
UpdateColumn();
if (IsEndOfStream())
{
_start = _position;
_end = _position;
_kind = TokenKind.EndOfFile;
_value = null;
return(false);
}
byte code = _graphQLData[_position];
if (GraphQLConstants.IsPunctuator(code))
{
ReadPunctuatorToken(code);
return(true);
}
if (GraphQLConstants.IsLetterOrUnderscore(code))
{
ReadNameToken();
return(true);
}
if (GraphQLConstants.IsDigitOrMinus(code))
{
ReadNumberToken(code);
return(true);
}
if (code == GraphQLConstants.Hash)
{
ReadCommentToken();
return(true);
}
if (code == GraphQLConstants.Quote)
{
if (_length > _position + 2 &&
_graphQLData[_position + 1] == GraphQLConstants.Quote &&
_graphQLData[_position + 2] == GraphQLConstants.Quote)
{
_position += 2;
ReadBlockStringToken();
}
else
{
ReadStringValueToken();
}
return(true);
}
throw new SyntaxException(this,
$"Unexpected character `{(char)code}` ({code}).");
}
public bool Read()
{
_floatFormat = null;
SkipWhitespaces();
UpdateColumn();
if (IsEndOfStream())
{
_start = _position;
_end = _position;
_kind = TokenKind.EndOfFile;
_value = null;
var token = new SyntaxToken(
TokenKind.EndOfFile, _position, _position,
_line, _column, null, _token);
_token.Next = token;
_token = token;
return(false);
}
char code = _graphQLData[_position];
if (_isPunctuator[code])
{
ReadPunctuatorToken(code);
CreateToken();
return(true);
}
if (_isLetterOrDigitOrUnderscore[code])
{
ReadNameToken();
CreateToken();
return(true);
}
if (_isDigitOrMinus[code])
{
ReadNumberToken(code);
CreateToken();
return(true);
}
if (code == GraphQLConstants.Hash)
{
ReadCommentToken();
CreateToken();
return(true);
}
if (code == GraphQLConstants.Quote)
{
if (_length > _position + 2 &&
_graphQLData[_position + 1] == GraphQLConstants.Quote &&
_graphQLData[_position + 2] == GraphQLConstants.Quote)
{
_position += 2;
ReadBlockStringToken();
}
else
{
ReadStringValueToken();
}
CreateToken();
return(true);
}
throw new SyntaxException(this,
$"Unexpected character `{(char)code}` ({code}).");
}