///////////////////////////////////////////////////////////////////////////////////////////////
private static void RemoveEndOfLine(
byte[] buffer, /* in */
CharList endOfLine, /* in */
bool useAnyEndOfLineChar, /* in */
ref int bufferLength /* in, out */
)
{
if ((buffer != null) && (endOfLine != null) && (bufferLength > 0))
{
if (useAnyEndOfLineChar)
{
int bufferIndex = bufferLength - 1;
while (bufferIndex >= 0)
{
if (endOfLine.Contains(ConversionOps.ToChar(buffer[bufferIndex])))
{
bufferIndex--;
}
else
{
break;
}
}
bufferLength = bufferIndex + 1;
}
else
{
int eolLength = endOfLine.Count;
if (bufferLength >= eolLength)
{
bool match = true;
int bufferIndex = bufferLength - eolLength;
int eolIndex = 0;
while ((bufferIndex < bufferLength) &&
(eolIndex < eolLength))
{
if (buffer[bufferIndex] != ConversionOps.ToByte(endOfLine[eolIndex]))
{
match = false;
break;
}
bufferIndex++;
eolIndex++;
}
if (match)
{
bufferLength -= eolLength;
}
}
}
}
}
private StringBuilder RemoveTrashXMLFast(StringBuilder text)
{
// Removing other
if (text.ToString().Any(c => !CharList.Contains(c.ToString().ToLower()[0])))
{
foreach (char c in text.ToString().Where(c => !CharList.Contains(c.ToString().ToLower()[0])))
{
text.Replace(c.ToString(), " ");
}
}
return(text);
}
private string ModifyNGram(string ngram)
{
ngram = ngram.ToLower();
if (ngram.Length == 1)
{
if (!(CharList.Contains(ngram[0]) && char.IsLetter(ngram[0])))
{
return(null);
}
return(ngram);
}
if (ngram.Length == 2)
{
string first = (CharList.Contains(ngram[0]) && char.IsLetter(ngram[0])) ? ngram[0].ToString() : "*";
string last = (CharList.Contains(ngram[ngram.Length - 1]) && char.IsLetter(ngram[ngram.Length - 1])) ? ngram[ngram.Length - 1].ToString() : "*";
if (first == "*" && last == "*")
{
return(null);
}
return(first + last);
}
else
{
string first = (CharList.Contains(ngram[0]) && char.IsLetter(ngram[0])) ? ngram[0].ToString() : "*";
string last = (CharList.Contains(ngram[ngram.Length - 1]) && char.IsLetter(ngram[ngram.Length - 1])) ? ngram[ngram.Length - 1].ToString() : "*";
string center = new string(ngram.Skip(1).Take(ngram.Length - 2).ToArray());
foreach (char c in center)
{
if (!CharList.Contains(c) || !char.IsLetter(c))
{
return(null);
}
}
return(first + center + last);
}
}
private StringBuilder RemoveTrashPlainText(StringBuilder text)
{
while (text.ToString().IndexOf('[') != -1)
{
int start_position = text.ToString().IndexOf('[');
int end_position = text.ToString().IndexOf(']', start_position);
if (end_position != -1)
{
text = text.Remove(start_position, end_position - start_position + 1);
}
else
{
break;
}
}
while (text.ToString().IndexOf('<') != -1)
{
int start_position = text.ToString().IndexOf('<');
int end_position = text.ToString().IndexOf('>', start_position);
if (end_position != -1)
{
text = text.Remove(start_position, end_position - start_position + 1);
}
else
{
break;
}
}
text = text.Replace("==", "");
if (text.ToString().Any(c => !CharList.Contains(c.ToString().ToLower()[0])))
{
foreach (char c in text.ToString().Where(c => !CharList.Contains(c.ToString().ToLower()[0])))
{
text.Replace(c.ToString(), " ");
}
}
return(text);
}
private StringBuilder RemoveTrashXML(StringBuilder text)
{
// Removing ':{{', '{{{', '}}}', '}}}}', '== =='
text = text.Replace(":{{", "{{").Replace("{{{", "{{").Replace("}}}", "").Replace("}}}}", "}}");
// Removing 'wrapers' without depth
List <Tuple <string, string> > wrapers = new List <Tuple <string, string> >()
{
new Tuple <string, string>("==", "=="),
new Tuple <string, string>("=", "="),
new Tuple <string, string>("<ref>", "</ref>"),
new Tuple <string, string>("[[File:", ".]]"),
new Tuple <string, string>("[[Image:", "]]"),
new Tuple <string, string>("[[wikt:", "]]")
};
foreach (Tuple <string, string> wraper in wrapers)
{
while (text.ToString().IndexOf(wraper.Item1) != -1)
{
int start_position = text.ToString().IndexOf(wraper.Item1);
int end_position = text.ToString().IndexOf(wraper.Item2, start_position);
int check_position = start_position;
if (end_position != -1)
{
text = text.Remove(start_position, end_position - start_position + wraper.Item2.Length);
}
else
{
break;
}
}
}
// Removing 'wrapers'
List <Tuple <string, string> > deep_wrapers = new List <Tuple <string, string> >()
{
new Tuple <string, string>("[[File:", "]]"),
new Tuple <string, string>("{{", "}}"),
new Tuple <string, string>("{|", "|}"),
new Tuple <string, string>("(", ")")
};
foreach (Tuple <string, string> wraper in deep_wrapers)
{
while (text.ToString().IndexOf(wraper.Item1) != -1)
{
int start_position = text.ToString().IndexOf(wraper.Item1);
int end_position = text.ToString().IndexOf(wraper.Item2, start_position);
int check_position = start_position;
while (true)
{
check_position = text.ToString().IndexOf(wraper.Item1, check_position + 1);
if (end_position > check_position && check_position != -1)
{
end_position = text.ToString().IndexOf(wraper.Item2, end_position + 1);
}
else
{
break;
}
}
if (end_position != -1)
{
text = text.Remove(start_position, end_position - start_position + wraper.Item2.Length);
}
else
{
break;
}
}
}
// Removing '[[ ]]'
while (text.ToString().IndexOf("[[") != -1)
{
int start_position = text.ToString().IndexOf("[[");
int end_position = text.ToString().IndexOf("]]", start_position);
int devider_position = text.ToString().IndexOf("|", start_position);
if (end_position != -1)
{
if (devider_position > start_position && devider_position < end_position)
{
text = text.Remove(devider_position, end_position - devider_position + 2);
text = text.Remove(start_position, 2);
}
else
{
text = text.Remove(end_position, 2);
text = text.Remove(start_position, 2);
}
}
else
{
break;
}
}
// Removing '[ ]'
while (text.ToString().IndexOf("[") != -1)
{
int start_position = text.ToString().IndexOf("[");
int end_position = text.ToString().IndexOf("]", start_position);
int check_position = start_position;
if (end_position != -1)
{
text = text.Remove(start_position, end_position - start_position + 1);
}
else
{
break;
}
}
// Removing other
if (text.ToString().Any(c => !CharList.Contains(c.ToString().ToLower()[0])))
{
foreach (char c in text.ToString().Where(c => !CharList.Contains(c.ToString().ToLower()[0])))
{
text.Replace(c.ToString(), " ");
}
}
return(text);
}
///////////////////////////////////////////////////////////////////////////////////////////////
public ReturnCode Read( /* throw */
int count,
CharList endOfLine,
bool useAnyEndOfLineChar,
ref ByteList list,
ref Result error
)
{
CheckDisposed();
ReturnCode code = ReturnCode.Error;
if (stream != null)
{
//
// NOTE: Allocate enough for the whole file.
//
if (list == null)
{
long length = 0;
//
// NOTE: Only attempt to query the length of
// seekable streams.
//
if (stream.CanSeek)
{
length = stream.Length;
}
if (length > 0)
{
list = new ByteList((int)Math.Min(length, MaximumBufferSize));
}
else
{
list = new ByteList();
}
}
//
// NOTE: Read from the stream in a loop until we hit a terminator
// (typically "end of line" or "end of file").
//
int readCount = 0;
bool eolFound = false;
int eolLength = (endOfLine != null) ? endOfLine.Count : 0;
int eolIndex = 0;
do
{
int value = ReadByte(stream);
//
// NOTE: Did we hit the end of the stream?
//
if (value != EndOfFile)
{
byte byteValue = ConversionOps.ToByte(value);
//
// NOTE: Did they supply a valid end-of-line sequence to check
// against?
//
if ((endOfLine != null) && (eolLength > 0))
{
//
// NOTE: Does the caller want to stop reading as soon as any of
// the supplied end-of-line characters are detected?
//
if (useAnyEndOfLineChar)
{
//
// NOTE: Does the byte match any of the supplied end-of-line
// characters?
//
if (endOfLine.Contains(ConversionOps.ToChar(byteValue)))
{
eolFound = true;
}
}
else
{
//
// NOTE: Does the byte we just read match the next character in
// the end-of-line sequence we were expecting to see?
//
if (byteValue == endOfLine[eolIndex])
{
//
// NOTE: Have we just match the last character of the end-of-line
// sequence? If so, we have found the end-of-line and we
// are done.
//
if (++eolIndex == eolLength)
{
eolFound = true; /* NOTE: Hit end-of-line sequence. */
}
}
else if (eolIndex > 0)
{
//
// NOTE: Any bytes previously matched against end-of-line sequence
// characters no longer count because the end-of-line sequence
// characters must appear consecutively.
//
eolIndex = 0;
}
}
}
//
// NOTE: Add the byte (which could potentially be part of an end-of-line
// sequence) to the buffer.
//
list.Add(byteValue);
//
// NOTE: We just read another byte, keep track.
//
readCount++;
//
// NOTE: Now that we have added the byte to the buffer, check to see if we
// hit the end-of-line (above). If so, remove the end-of-line seuqnece
// from the end of the buffer and bail out.
//
if (eolFound)
{
int bufferLength = list.Count;
RemoveEndOfLine(list.ToArray(), endOfLine, useAnyEndOfLineChar, ref bufferLength);
while (list.Count > bufferLength)
{
list.RemoveAt(list.Count - 1);
}
break;
}
}
else
{
hitEndOfStream = true; /* NOTE: No more data. */
break;
}
}while ((count == Count.Invalid) || (readCount < count));
TranslateEndOfLine(StreamDirection.Input, list, ref list); // TEST: Test this.
code = ReturnCode.Ok;
}
else
{
error = "invalid stream";
}
return(code);
}
