/// <summary>
/// Return the EncodedLine Segments in the given segment
/// </summary>
/// <param name="segment">Segment to parse</param>
/// <returns>An enumeration of <see cref="EncodedLine"/></returns>
public static IEnumerable <EncodedLine> ReadLines(StringSegment segment)
{
CharReader reader = new CharReader(segment);
int startIndex = reader.Position + 1;
int endIndex = startIndex - 1;
char ch;
while ((ch = reader.Read()) != CharReader.EOF)
{
switch (ch)
{
default:
endIndex = reader.Position;
break;
case MimeStandard.CR:
if (reader.Read() != MimeStandard.LF)
{
throw new MimeException(MimeError.InvalidCRLF);
}
yield return(LineFromSegment(reader.GetSegment(startIndex, endIndex), true));
startIndex = reader.Position + 1;
endIndex = reader.Position;
break;
}
}
if (endIndex >= startIndex)
{
yield return(LineFromSegment(reader.GetSegment(startIndex, endIndex), false));
}
}
public void CharReaderShouldReadCharacters()
{
string source = "abc";
CharReader reader = new CharReader(source);
Assert.False(reader.IsDone);
Assert.Equal('a', reader.Read());
Assert.Equal('b', reader.Read());
Assert.Equal('c', reader.Read());
Assert.Equal(CharReader.EOF, reader.Read());
Assert.True(reader.IsDone);
}
/// <summary>
/// Advances the start position of <paramref name="text"/> to the first non-whitespace position
/// </summary>
/// <param name="text">The <see cref="StringSegment"/> potentially containing initial whitepace</param>
/// <returns>A <see cref="StringSegment"/> with no intial whitespace (possibly an empty segment if the <paramref name="text"/> was empty or all whitespace)</returns>
public static StringSegment SkipWhitespace(StringSegment text)
{
CharReader reader = new CharReader(text);
char ch;
while ((ch = reader.Read()) != CharReader.EOF && MimeStandard.IsWhitespace(ch))
{
// quick skip
}
return(new StringSegment(text.Source, reader.Position, text.EndIndex));
}
/// <summary>
/// Breaks the supplied <paramref name="entity"/> into constituent lines by CRLF.
/// </summary>
/// <param name="entity">The entity to parse into lines.</param>
/// <returns>An enumeration of <see cref="StringSegment"/> instances, one for each parsed line</returns>
public static IEnumerable <StringSegment> ReadLines(StringSegment entity)
{
CharReader reader = new CharReader(entity);
int startIndex = reader.Position + 1;
int endIndex = startIndex - 1;
char ch;
while ((ch = reader.Read()) != CharReader.EOF)
{
switch (ch)
{
default:
endIndex = reader.Position;
break;
case MimeStandard.CR:
//
// RFC 2822 mandates that CRLF be together always
//
if (reader.Read() != MimeStandard.LF)
{
throw new MimeException(MimeError.InvalidCRLF);
}
yield return(reader.GetSegment(startIndex, endIndex));
startIndex = reader.Position + 1;
endIndex = reader.Position;
break;
}
}
if (endIndex >= 0)
{
yield return(reader.GetSegment(startIndex, endIndex));
}
}
IEnumerable <char> DecodeLine()
{
m_lineReader = new CharReader(m_currentLine.Text);
char ch;
while ((ch = m_lineReader.Read()) != CharReader.EOF)
{
if (ch != EncodingChar)
{
yield return(ch);
}
else
{
char decodedChar = this.DecodeChar();
if (decodedChar != char.MinValue)
{
yield return(decodedChar);
}
}
}
}
/// <summary>
/// Return the EncodedLine Segments in the given segment
/// </summary>
/// <param name="segment">Segment to parse</param>
/// <returns>An enumeration of <see cref="EncodedLine"/></returns>
public static IEnumerable<EncodedLine> ReadLines(StringSegment segment)
{
CharReader reader = new CharReader(segment);
int startIndex = reader.Position + 1;
int endIndex = startIndex - 1;
char ch;
while ((ch = reader.Read()) != CharReader.EOF)
{
switch (ch)
{
default:
endIndex = reader.Position;
break;
case MimeStandard.CR:
if (reader.Read() != MimeStandard.LF)
{
throw new MimeException(MimeError.InvalidCRLF);
}
yield return LineFromSegment(reader.GetSegment(startIndex, endIndex), true);
startIndex = reader.Position + 1;
endIndex = reader.Position;
break;
}
}
if (endIndex >= startIndex)
{
yield return LineFromSegment(reader.GetSegment(startIndex, endIndex), false);
}
}
IEnumerable<char> DecodeLine()
{
m_lineReader = new CharReader(m_currentLine.Text);
char ch;
while ((ch = m_lineReader.Read()) != CharReader.EOF)
{
if (ch != EncodingChar)
{
yield return ch;
}
else
{
char decodedChar = this.DecodeChar();
if (decodedChar != char.MinValue)
{
yield return decodedChar;
}
}
}
}
public void CharReaderKeepsReadingAfterFoundPosition()
{
string source = "abc:123";
CharReader reader = new CharReader(source);
reader.ReadTo(':', false);
Assert.Equal('1', reader.Read());
}