/// <summary>
/// Read an encoded line of text from the stream, with a specified line ending
/// </summary>
/// <param name="encoding">The text encoding to use</param>
/// <param name="lineEnding">Specify the line ending required for the line</param>
/// <param name="maxLength">Maximum length of a line, <= indicates to end of string</param>
/// <returns>The string, empty string on end of stream</returns>
public string ReadLine(Encoding encoding, TextLineEnding lineEnding, int maxLength)
{
StringBuilder buf = new StringBuilder();
bool hasCr = false;
if (!_eof)
{
try
{
while (true)
{
char currChar = ReadChar(encoding);
buf.Append(currChar);
if ((maxLength > 0) && (buf.Length == maxLength))
{
break;
}
if (currChar == '\n')
{
if (lineEnding == TextLineEnding.LineFeed)
{
break;
}
else if ((lineEnding == TextLineEnding.CarriageReturnLineFeed) && hasCr)
{
break;
}
}
else if (currChar == '\r')
{
if (lineEnding == TextLineEnding.CarriageReturn)
{
break;
}
else
{
hasCr = true;
}
}
else
{
hasCr = false;
}
}
}
catch (EndOfStreamException)
{
if (buf.Length == 0)
{
// Rethrow if buffer was 0
throw;
}
}
}
return(buf.ToString());
}
/// <summary>
/// Write a line to the stream using a specified encoding and line ending
/// </summary>
/// <param name="line">The line to write</param>
/// <param name="encoding">The encoding to use</param>
/// <param name="lineEnding">The type of line ending</param>
public void WriteLine(string line, Encoding encoding, TextLineEnding lineEnding)
{
string lineEndingString = "\n";
switch (lineEnding)
{
case TextLineEnding.LineFeed:
lineEndingString = "\n";
break;
case TextLineEnding.CarriageReturn:
lineEndingString = "\r";
break;
case TextLineEnding.CarriageReturnLineFeed:
lineEndingString = "\r\n";
break;
}
Write(line, encoding);
Write(lineEndingString, encoding);
}
/// <summary>
/// Read an encoded line of text from the stream, with a specified line ending
/// </summary>
/// <param name="encoding">The text encoding to use</param>
/// <param name="lineEnding">Specify the line ending required for the line</param>
/// <returns>The string, empty string on end of stream</returns>
public string ReadLine(Encoding encoding, TextLineEnding lineEnding)
{
return(ReadLine(encoding, lineEnding, 0));
}
/// <summary>
/// Read a ASCII python compatible string from the stream with a specified line ending
/// </summary>
/// <param name="lineEnding">The line ending</param>
/// <returns>The string, empty string on end of stream</returns>
public string ReadLine(TextLineEnding lineEnding)
{
return(ReadLine(BinaryEncoding.Instance, lineEnding));
}
/// <summary>
/// Write a line to the stream using a binary encoding and a specified line ending
/// </summary>
/// <param name="line">The line to write</param>
/// <param name="lineEnding">The type of line ending</param>
public void WriteLine(string line, TextLineEnding lineEnding)
{
WriteLine(line, BinaryEncoding.Instance, lineEnding);
}
