/// <summary>
/// Reads stream to match it against an amount, number or indefinite article. Sets any parsed value to usage.Amount
/// </summary>
/// <param name="stream">
/// </param>
/// <param name="matchdata">
/// </param>
/// <returns>
/// The <see cref="bool"/>.
/// </returns>
public bool Read(Stream stream, MatchData matchdata)
{
// We probably have to detect a potential numeric match up front and then parsewith Validate,
// otherwise scan till first space and check if it's a number (do we support numbers with spaces?)
var matchPos = stream.Position;
var origPos = matchPos;
int curByte;
matchdata.Amount = null;
var curBuffer = string.Empty;
var invalidNumeric = new Regex(@"[^0-9 /.-]");
while ((curByte = stream.ReadByte()) >= 0)
{
float parsedAmtHigh;
float? parsedAmtLow;
curBuffer += (char)curByte;
if (Validate(curBuffer, out parsedAmtLow, out parsedAmtHigh))
{
matchPos = stream.Position;
matchdata.Amount = new Amount
{
SizeLow = parsedAmtLow,
SizeHigh = parsedAmtHigh
};
}
else
{
if (invalidNumeric.IsMatch(curBuffer))
{
stream.Seek(origPos, SeekOrigin.Begin);
var numericParser = new NumericToken();
if (numericParser.Read(stream, matchdata))
{
matchPos = stream.Position;
}
break;
}
}
}
stream.Seek(matchPos, SeekOrigin.Begin);
return matchdata.Amount != null;
}
/// <summary>
/// Reads stream to match it against an amount, number or indefinite article. Sets any parsed value to usage.Amount
/// </summary>
/// <param name="stream"></param>
/// <param name="matchdata"></param>
/// <returns></returns>
public bool Read(Stream stream, MatchData matchdata)
{
//We probably have to detect a potential numeric match up front and then parsewith Validate, otherwise scan till first space and check if it's a number (do we support numbers with spaces?)
var matchPosition = stream.Position;
var originalPosition = matchPosition;
int currentByte;
matchdata.Amount = null;
var curBuffer = String.Empty;
var invalidNumeric = new Regex(@"[^0-9 /.-]");
while ((currentByte = stream.ReadByte()) >= 0)
{
float parsedAmtHigh;
float?parsedAmtLow;
curBuffer += (char)currentByte;
if (Validate(curBuffer, out parsedAmtLow, out parsedAmtHigh)) //Try to parse buffer as a valid number or fraction
{
matchPosition = stream.Position;
matchdata.Amount = new Amount();
matchdata.Amount.SizeLow = parsedAmtLow;
matchdata.Amount.SizeHigh = parsedAmtHigh;
}
else //Stop processing as soon as we hit something that can no longer be an amount
{
if (invalidNumeric.IsMatch(curBuffer)) //Buffer has something in it other than 0-9 /.
{
//Hold on, let's try parsing this buffer using the NumericToken parser
stream.Seek(originalPosition, SeekOrigin.Begin);
var numericParser = new NumericToken();
if (numericParser.Read(stream, matchdata))
{
matchPosition = stream.Position;
}
break;
}
}
}
stream.Seek(matchPosition, SeekOrigin.Begin);
return(matchdata.Amount != null); //We found a valid amount here
}
/// <summary>
/// Reads stream to match it against an amount, number or indefinite article. Sets any parsed value to usage.Amount
/// </summary>
/// <param name="stream"></param>
/// <param name="matchdata"></param>
/// <returns></returns>
public bool Read(Stream stream, MatchData matchdata)
{
//We probably have to detect a potential numeric match up front and then parsewith Validate, otherwise scan till first space and check if it's a number (do we support numbers with spaces?)
var matchPosition = stream.Position;
var originalPosition = matchPosition;
int currentByte;
matchdata.Amount = null;
var curBuffer = String.Empty;
var invalidNumeric = new Regex(@"[^0-9 /.-]");
while ((currentByte = stream.ReadByte()) >= 0)
{
float parsedAmtHigh;
float? parsedAmtLow;
curBuffer += (char) currentByte;
if (Validate(curBuffer, out parsedAmtLow, out parsedAmtHigh)) //Try to parse buffer as a valid number or fraction
{
matchPosition = stream.Position;
matchdata.Amount = new Amount();
matchdata.Amount.SizeLow = parsedAmtLow;
matchdata.Amount.SizeHigh = parsedAmtHigh;
}
else //Stop processing as soon as we hit something that can no longer be an amount
{
if (invalidNumeric.IsMatch(curBuffer)) //Buffer has something in it other than 0-9 /.
{
//Hold on, let's try parsing this buffer using the NumericToken parser
stream.Seek(originalPosition, SeekOrigin.Begin);
var numericParser = new NumericToken();
if (numericParser.Read(stream, matchdata))
{
matchPosition = stream.Position;
}
break;
}
}
}
stream.Seek(matchPosition, SeekOrigin.Begin);
return (matchdata.Amount != null); //We found a valid amount here
}