public string ReadValue(TextFileContext context)
{
Ensure.ArgumentNotNull(context, "context");
context.EnsureNotAtEndOfLine(size);
context.CurrentLinePosition += size;
return context.CurrentLine.Substring(context.CurrentLinePosition - size, size);
}
public string ReadValue(TextFileContext context)
{
Ensure.ArgumentNotNull(context, "context");
context.EnsureNotAtEndOfLine();
// TODO: Test performance of this under load, may need to switch to unsafe code
int startPosition = context.CurrentLinePosition;
bool isQuoted = false;
int endExcess = 0;
var quotePositions = new List<int>();
var escapePositions = new List<int>();
while (!context.Eol)
{
if (context.IsTokenAtCurrentPosition(escapedQuoteToken))
{
escapePositions.Add(context.CurrentLinePosition);
context.CurrentLinePosition += escapedQuoteToken.Length;
continue;
}
if (context.IsTokenAtCurrentPosition(quoteToken))
{
quotePositions.Add(context.CurrentLinePosition);
context.CurrentLinePosition += quoteToken.Length;
isQuoted = !isQuoted;
continue;
}
var foundSeparator = isQuoted ? null : delimiters
.Where(s => context.IsTokenAtCurrentPosition(s))
.FirstOrDefault();
if (foundSeparator != null)
{
context.CurrentLinePosition += foundSeparator.Length;
endExcess = foundSeparator.Length;
break;
}
++context.CurrentLinePosition;
}
var value = context.CurrentLine.Substring(startPosition,
context.CurrentLinePosition - startPosition - endExcess);
if (quotePositions.Any())
value = RemoveTokens(value, quoteToken, quotePositions.Select(p => p - startPosition));
if (escapePositions.Any())
value = RemoveTokens(value, escapeToken, escapePositions.Select(p => p - startPosition));
return value;
}
