/**
* Parse date part and return index to next token (for time)
* <ul>
* <li>MMM DD, YYYY - Jan 31, 2011</li>
* </ul>
*/
private int ParseDateMMMDDYYYY(string sdate, ref DateInfo info, List <DateToken> tokens)
{
info.DayOfMonth = ToNumeric(sdate, tokens[2]);
// locate year
for (int i = 3; i < tokens.Count; i++)
{
DateToken token = tokens[i];
switch (token.Type)
{
case DateToken.TType.NUMERIC:
info.Year = ToYear((int)token);
return(i + 1);
case DateToken.TType.COMMA:
case DateToken.TType.DASH:
case DateToken.TType.WHITESPACE:
case DateToken.TType.SLASH:
break;
default:
throw new ArgumentException("failed to parse date, invalid date format: " + sdate);
}
}
throw new ArgumentException("failed to parse date, invalid date format: " + sdate);
}
/**
* Normalize year
*/
private int ToYear(string sdate, DateToken tok)
{
if (tok.Type != DateToken.TType.NUMERIC)
{
throw new ArgumentException("failed to parse date, as unknown form: " + sdate);
}
else
{
return(ToYear((int)tok));
}
}
/**
* Parse date part and return index to next token (for time)
* <ul>
* <li>YYYYMMDD - ie 20080401</li>
* <li>dd-MMM-YY - ie 23-Dec-07</li>
* <li>dd-MMM-YYYY - ie 23-Dec-2007</li>
* <li>YYYY-MM-dd - ie 2007-11-03</li>
* <li>MM/dd/YY - ie 12/01/07</li>
* <li>MM/dd/YYYY - ie 12/01/2007</li>
* <li>dd/MM/YY - ie 01/12/07 (british)</li>
* <li>dd/MM/YYYY - ie 01/12/2007 (british)</li>
* </ul>
*/
private int ParseDateNN(string sdate, ref DateInfo info, List <DateToken> tokens)
{
var len = tokens.Count;
int Inow = 0;
DateToken T1 = tokens[0];
// YYYYMMDD case
if (len == 1)
{
int yyyymmdd = (int)T1;
info.Year = Bound(sdate, yyyymmdd / 10000, 1950, 9999);
info.Month = Bound(sdate, (yyyymmdd / 100) % 100, 1, 12);
info.DayOfMonth = Bound(sdate, yyyymmdd % 100, 1, 31);
return(1);
}
DateToken T2 = tokens[Inow = SkipSeparator(tokens, Inow + 1)];
DateToken T3 = tokens[Inow = SkipSeparator(tokens, Inow + 1)];
// dd-MMM-yy case
if (T2.Type == DateToken.TType.ALPHA)
{
info.Month = ToMonthOrDay((string)T2);
info.DayOfMonth = Bound(sdate, ToNumeric(sdate, T1), 1, 31);
info.Year = ToYear(sdate, T3);
return(Inow + 1);
}
// yyyy-mm-dd case
else if ((int)T1 > 1000)
{
info.Year = ToYear(sdate, T1);
info.Month = Bound(sdate, ToNumeric(sdate, T2), 1, 12);
info.DayOfMonth = Bound(sdate, ToNumeric(sdate, T3), 1, 31);
return(Inow + 1);
}
// mm/dd/yy case
else if (_convention == Convention.American)
{
info.DayOfMonth = Bound(sdate, ToNumeric(sdate, T2), 1, 31);
info.Month = Bound(sdate, ToNumeric(sdate, T1), 1, 12);
info.Year = ToYear(sdate, T3);
return(Inow + 1);
}
// dd/mm/yy case
else
{
info.DayOfMonth = Bound(sdate, ToNumeric(sdate, T1), 1, 31);
info.Month = Bound(sdate, ToNumeric(sdate, T2), 1, 12);
info.Year = ToYear(sdate, T3);
return(Inow + 1);
}
}
/**
* Determine timezone for this date
*/
private ZTimeZone GetTimezone(DateToken tok)
{
switch (tok.Type)
{
case DateToken.TType.Z:
return(ZTimeZone.GMT);
case DateToken.TType.ALPHA:
return(new ZTimeZone((string)tok));
default:
return(default(ZTimeZone));
}
}
/**
* Parse date part and return index to next token (for time)
* <ul>
* <li>DAY, dd MMM YYYY - ie Fri, 25 Jul 2008 10:38:41 GMT</li>
* </ul>
*/
private int ParseDateHTTP(string sdate, ref DateInfo info, List <DateToken> tokens)
{
int Inow = 0;
DateToken T2 = tokens[Inow = SkipSeparator(tokens, Inow + 1)];
DateToken T3 = tokens[Inow = SkipSeparator(tokens, Inow + 1)];
DateToken T4 = tokens[Inow = SkipSeparator(tokens, Inow + 1)];
// dd-MMM-yy case
if (T3.Type == DateToken.TType.ALPHA)
{
info.Month = ToMonthOrDay((string)T3);
info.DayOfMonth = Bound(sdate, ToNumeric(sdate, T2), 1, 31);
info.Year = ToYear(sdate, T4);
return(Inow + 1);
}
else
{
info.Month = Bound(sdate, ToNumeric(sdate, T3), 1, 12);
info.DayOfMonth = Bound(sdate, ToNumeric(sdate, T2), 1, 31);
info.Year = ToYear(sdate, T4);
return(Inow + 1);
}
}
/**
* Parse date part and return index to next token (for time)
* <ul>
* <li>HH:mm:ss - ie 23:10:00</li>
* <li>HH:mm:ss:SSS - ie 23:10:00:100</li>
* <li>HH:mm:ss.SSS - ie 23:10:00:100</li>
* </ul>
* Each of these formats can have a Z (for GMT) or timezone (EST) at the end of the
* time string.
*/
private void ParseTime(string sdate, ref DateInfo info, List <DateToken> tokens, int Istart)
{
var len = tokens.Count;
if (Istart == len)
{
return;
}
DateToken separator = tokens[Istart];
DateToken last = tokens[len - 1];
DateToken plast = tokens[len - 2];
if (separator.Type != DateToken.TType.WHITESPACE && separator.Type != DateToken.TType.T)
{
throw new ArgumentException("failed to parse date, as unknown time form: " + sdate);
}
int cap = 0;
if (last.Type == DateToken.TType.NUMERIC)
{
cap = len;
}
else if (plast.Type == DateToken.TType.NUMERIC)
{
cap = len - 1;
}
else
{
cap = len - 2;
}
int Inow = Istart + 1;
// get hours
if (Inow < cap)
{
info.Hours = Bound(sdate, ToNumeric(sdate, tokens[Inow]), 0, 23);
}
// get minutes
Inow = SkipSeparator(tokens, Inow + 1);
if (Inow < cap)
{
info.Minutes = Bound(sdate, ToNumeric(sdate, tokens[Inow]), 0, 59);
}
// get seconds
Inow = SkipSeparator(tokens, Inow + 1);
if (Inow < cap)
{
info.Seconds = Bound(sdate, ToNumeric(sdate, tokens[Inow]), 0, 59);
}
// get milli seconds
Inow = SkipSeparator(tokens, Inow + 1);
if (Inow < cap)
{
var fraction = Bound(sdate, ToNumeric(sdate, tokens [Inow]), 0, 999999999);
if (fraction <= 999)
{
info.Milliseconds = fraction;
}
else if (fraction <= 999999)
{
info.Milliseconds = fraction / 1000;
}
else
{
info.Milliseconds = fraction / 1000000;
}
}
// get timezone
info.Zone = GetTimezone(last);
}
