public void CharReaderShouldReadToCharacter()
{
StringSegment source = new StringSegment("abc:123");
CharReader reader = new CharReader(source);
reader.ReadTo(':', false);
Assert.Equal(3, reader.Position);
}
public void CharReaderShouldSkipEscape()
{
string source = "a\\:c:123";
CharReader reader = new CharReader(source);
reader.ReadTo(':', true);
Assert.Equal(4, reader.Position);
}
public void CharReaderNotAtEndIfFindsCharacter()
{
string source = "abc:123";
CharReader reader = new CharReader(source);
bool found = reader.ReadTo(':', false);
Assert.True(found);
Assert.False(reader.IsDone);
}
/// <summary>
/// Returns the first index of the supplied <paramref name="ch"/> <c>char</c> in <paramref name="text"/>
/// </summary>
/// <param name="text">The <see cref="string"/> to search</param>
/// <param name="ch">The <c>char</c> to test for</param>
/// <returns>The zero-based index of the first instance of <paramref name="ch"/>, or -1 if no instances found/</returns>
public static int IndexOf(string text, char ch)
{
CharReader reader = new CharReader(text);
if (reader.ReadTo(ch, false))
{
return(reader.Position);
}
return(-1);
}
/// <summary>
/// Read name value parameters from the given segment
/// </summary>
/// <param name="parameterText"></param>
/// <returns></returns>
public static KeyValuePair <string, string> ReadNameValue(StringSegment parameterText)
{
CharReader reader = new CharReader(parameterText); // Struct. Cheap
int nameStartAt = parameterText.StartIndex;
string name;
string value;
if (!reader.ReadTo(MimeFieldParameters.NameValueSeparator, true))
{
// We ran out of segment. Treat the entire segment as a value with no name
value = reader.Substring(nameStartAt, reader.Position);
return(new KeyValuePair <string, string>(string.Empty, value));
}
name = reader.Substring(nameStartAt, reader.Position - 1);
if (string.IsNullOrEmpty(name))
{
throw new MimeException(MimeError.InvalidFieldParameter);
}
value = ReadValue(ref reader);
return(new KeyValuePair <string, string>(name.TrimStart(), value));
}
static string ReadValue(ref CharReader reader)
{
int startAt = reader.Position + 1;
int endAt;
reader.ReadTo(MimeFieldParameters.NameValueSeparator, true, MailStandard.DQUOTE);
// We're forgiving here
if (reader.Current() == MailStandard.DQUOTE)
{
startAt++;
endAt = reader.Position - 1;
}
else
{
endAt = reader.Position;
}
string value = reader.Substring(startAt, endAt);
if (string.IsNullOrEmpty(value))
{
return(string.Empty);
}
return(UnescapeQuotes(value));
}
/// <summary>
/// Same as Split above, except automatically consumes quoted sections
/// </summary>
internal static IEnumerable <StringSegment> Split(StringSegment source, char separator, char quoteChar)
{
if (source.IsNull || source.IsEmpty)
{
yield break;
}
int startAt = source.StartIndex;
CharReader reader = new CharReader(source);
while (reader.ReadTo(separator, true, quoteChar))
{
yield return(new StringSegment(source.Source, startAt, reader.Position - 1)); // STRUCTS - fast
startAt = reader.Position + 1;
}
StringSegment last = new StringSegment(source.Source, startAt, reader.Position);
if (!last.IsEmpty)
{
yield return(last);
}
}
public void CharReaderShouldBeAtEndIfItDoesNotFindChar()
{
string source = "abc:123";
CharReader reader = new CharReader(source);
bool found = reader.ReadTo('?', false);
Assert.False(found);
Assert.True(reader.IsDone);
}
public void ParseQuotedFail(string source)
{
CharReader reader = new CharReader(source);
Assert.False(reader.ReadTo(':', true, '"'));
}
public void ParseQuotedSuccess(string source)
{
CharReader reader = new CharReader(source);
Assert.True(reader.ReadTo(':', true, '"'));
Assert.Equal("123", reader.GetRemainder().ToString());
}
public void CharReaderKeepsReadingAfterFoundPosition()
{
string source = "abc:123";
CharReader reader = new CharReader(source);
reader.ReadTo(':', false);
Assert.Equal('1', reader.Read());
}
