public ReadOnlyMemory <char> ReadFrom
(
char[] openChars,
char[] closeChars
)
{
if (IsEOF)
{
return(EmptySpan);
}
var state = new StateHolder(this);
var c = PeekChar();
if (Array.IndexOf(openChars, c) < 0)
{
state.Dispose();
return(EmptySpan);
}
ReadChar();
while (true)
{
c = ReadChar();
if (c == EOF)
{
state.Dispose();
return(EmptySpan);
}
if (Array.IndexOf(closeChars, c) >= 0)
{
break;
}
}
return(Substring
(
state.Position,
_position - state.Position
));
}
public ReadOnlyMemory <char> ReadUntil
(
char[] openChars,
char[] closeChars,
char[] stopChars
)
{
var state = new StateHolder(this);
var level = 0;
while (true)
{
var c = PeekChar();
if (c == EOF)
{
state.Dispose();
return(EmptySpan);
}
if (c.IsOneOf(openChars))
{
level++;
}
else if (c.IsOneOf(closeChars))
{
if (level == 0 &&
c.IsOneOf(stopChars))
{
break;
}
level--;
}
else if (c.IsOneOf(stopChars))
{
if (level == 0)
{
break;
}
}
ReadChar();
}
return(Substring
(
state.Position,
_position - state.Position
));
}
public ReadOnlyMemory <char> ReadUntil
(
string stopString
)
{
// Sure.NotNullNorEmpty(stopString, nameof(stopString));
var state = new StateHolder(this);
var length = 0;
var span = _text.Span;
while (true)
{
AGAIN:
var c = ReadChar();
if (c == EOF)
{
state.Dispose();
return(EmptySpan);
}
length++;
if (length >= stopString.Length)
{
var start = _position - stopString.Length;
for (var i = 0; i < stopString.Length; i++)
{
if (span[start + i] != stopString[i])
{
goto AGAIN;
}
}
break;
}
}
var result = Substring
(
state.Position,
_position - state.Position - stopString.Length
);
_position -= stopString.Length;
return(result);
}