private void expectToken(int desired, String errorMessage)
{
token = scanner.nextToken();
if (token.id != desired)
{
throw new ArgumentException(errorMessage);
}
}
private void expectToken(int desired, String errorMessage)
{
token = scanner.nextToken();
if (token.id != desired)
{
throw new ArgumentException(errorMessage);
}
}
internal TimeToken resolveMonthsMinutes(int newId)
{
if (token.id != TimeToken.MONTHS_MINUTES)
{
throw new ApplicationException("token id not MONTHS_MINUTES");
}
if (newId != TimeToken.MONTHS && newId != TimeToken.MINUTES)
{
throw new ApplicationException("new token id not MONTHS_MINUTES || MONTHS");
}
return(token = new TimeToken(token.value, newId));
}
private void plusMinus(int doop)
{
if (doop >= 0)
{
op = doop;
expectToken(TimeToken.NUMBER, "There should be number after " +
(op == TimeToken.PLUS ? '+' : '-'));
prev_multiplier = -1; /* reset months-minutes guessing mechanics */
}
int delta = int.Parse(token.value);
token = scanner.nextToken();
if (token.id == TimeToken.MONTHS_MINUTES)
{
/* hard job to guess what does that -5m means: -5mon or -5min? */
switch (prev_multiplier)
{
case TimeToken.DAYS:
case TimeToken.WEEKS:
case TimeToken.MONTHS:
case TimeToken.YEARS:
token = scanner.resolveMonthsMinutes(TimeToken.MONTHS);
break;
case TimeToken.SECONDS:
case TimeToken.MINUTES:
case TimeToken.HOURS:
token = scanner.resolveMonthsMinutes(TimeToken.MINUTES);
break;
default:
token = delta < 6 ? scanner.resolveMonthsMinutes(TimeToken.MONTHS) : scanner.resolveMonthsMinutes(TimeToken.MINUTES);
break;
}
}
prev_multiplier = token.id;
delta *= (op == TimeToken.PLUS) ? +1 : -1;
switch (token.id)
{
case TimeToken.YEARS:
spec.dyear += delta;
return;
case TimeToken.MONTHS:
spec.dmonth += delta;
return;
case TimeToken.WEEKS:
delta *= 7;
spec.dday += delta;
break;
/* FALLTHRU */
case TimeToken.DAYS:
spec.dday += delta;
return;
case TimeToken.HOURS:
spec.dhour += delta;
return;
case TimeToken.MINUTES:
spec.dmin += delta;
return;
default: // default is 'seconds'
spec.dsec += delta;
break;
}
}
/**
* Parses the input string specified in the constructor.
* @return Object representing parsed date/time.
*/
public TimeSpec parse()
{
long now = DateTime.Now.Ticks / TimeSpan.TicksPerSecond;
int hr = 0;
int time_reference;
/* this MUST be initialized to zero for midnight/noon/teatime */
/* establish the default time reference */
spec.localtime(now);
token = scanner.nextToken();
switch (token.id)
{
case TimeToken.PLUS:
case TimeToken.MINUS:
break; /* jump to OFFSET-SPEC part */
case TimeToken.START:
spec.type = TimeSpec.TYPE_START;
if (spec.type != TimeSpec.TYPE_START)
{
spec.type = TimeSpec.TYPE_END;
}
spec.year = spec.month = spec.day = spec.hour = spec.min = spec.sec = 0;
time_reference = token.id;
token = scanner.nextToken();
if (token.id == TimeToken.PLUS || token.id == TimeToken.MINUS)
{
break;
}
if (time_reference != TimeToken.NOW)
{
throw new ArgumentException("Words 'start' or 'end' MUST be followed by +|- offset");
}
if (token.id != TimeToken.EOF)
{
throw new ArgumentException("If 'now' is followed by a token it must be +|- offset");
}
break;
/* FALLTHRU */
case TimeToken.END:
if (spec.type != TimeSpec.TYPE_START)
{
spec.type = TimeSpec.TYPE_END;
}
spec.year = spec.month = spec.day = spec.hour = spec.min = spec.sec = 0;
time_reference = token.id;
token = scanner.nextToken();
if (token.id == TimeToken.PLUS || token.id == TimeToken.MINUS)
{
break;
}
if (time_reference != TimeToken.NOW)
{
throw new ArgumentException("Words 'start' or 'end' MUST be followed by +|- offset");
}
if (token.id != TimeToken.EOF)
{
throw new ArgumentException("If 'now' is followed by a token it must be +|- offset");
}
break;
/* FALLTHRU */
case TimeToken.NOW:
time_reference = token.id;
token = scanner.nextToken();
if (token.id == TimeToken.PLUS || token.id == TimeToken.MINUS)
{
break;
}
if (time_reference != TimeToken.NOW)
{
throw new ArgumentException("Words 'start' or 'end' MUST be followed by +|- offset");
}
if (token.id != TimeToken.EOF)
{
throw new ArgumentException("If 'now' is followed by a token it must be +|- offset");
}
break;
/* Only absolute time specifications below */
case TimeToken.NUMBER:
timeOfDay();
if (token.id == TimeToken.PLUS || token.id == TimeToken.MINUS)
{
break;
}
day();
if (token.id != TimeToken.NUMBER)
{
break;
}
timeOfDay();
break;
/* fix month parsing */
case TimeToken.JAN:
case TimeToken.FEB:
case TimeToken.MAR:
case TimeToken.APR:
case TimeToken.MAY:
case TimeToken.JUN:
case TimeToken.JUL:
case TimeToken.AUG:
case TimeToken.SEP:
case TimeToken.OCT:
case TimeToken.NOV:
case TimeToken.DEC:
day();
if (token.id != TimeToken.NUMBER)
{
break;
}
timeOfDay();
break;
/* evil coding for TEATIME|NOON|MIDNIGHT - we've initialized
* hr to zero up above, then fall into this case in such a
* way so we add +12 +4 hours to it for teatime, +12 hours
* to it for noon, and nothing at all for midnight, then
* set our rettime to that hour before leaping into the
* month scanner
*/
case TimeToken.TEATIME:
hr += 4;
hr += 12;
spec.hour = hr;
spec.min = 0;
spec.sec = 0;
token = scanner.nextToken();
day();
break;
/* FALLTHRU */
case TimeToken.NOON:
hr += 12;
spec.hour = hr;
spec.min = 0;
spec.sec = 0;
token = scanner.nextToken();
day();
break;
/* FALLTHRU */
case TimeToken.MIDNIGHT:
spec.hour = hr;
spec.min = 0;
spec.sec = 0;
token = scanner.nextToken();
day();
break;
default:
throw new ArgumentException("Unparsable time: " + token.value);
}
/*
* the OFFSET-SPEC part
*
* (NOTE, the sc_tokid was prefetched for us by the previous code)
*/
if (token.id == TimeToken.PLUS || token.id == TimeToken.MINUS)
{
scanner.setContext(false);
while (token.id == TimeToken.PLUS || token.id == TimeToken.MINUS ||
token.id == TimeToken.NUMBER)
{
if (token.id == TimeToken.NUMBER)
{
plusMinus(PREVIOUS_OP);
}
else
{
plusMinus(token.id);
}
token = scanner.nextToken();
/* We will get EOF eventually but that's OK, since
* token() will return us as many EOFs as needed */
}
}
/* now we should be at EOF */
if (token.id != TimeToken.EOF)
{
throw new ArgumentException("Unparsable trailing text: " + token.value);
}
return(spec);
}
private void day()
{
long mday = 0;
long mon, year = spec.year;
switch (token.id)
{
case TimeToken.YESTERDAY:
spec.RemoveDays(1);
token = scanner.nextToken();
break;
/* FALLTRHU */
case TimeToken.TODAY: /* force ourselves to stay in today - no further processing */
token = scanner.nextToken();
break;
case TimeToken.TOMORROW:
spec.AddDays(1);
token = scanner.nextToken();
break;
case TimeToken.JAN:
case TimeToken.FEB:
case TimeToken.MAR:
case TimeToken.APR:
case TimeToken.MAY:
case TimeToken.JUN:
case TimeToken.JUL:
case TimeToken.AUG:
case TimeToken.SEP:
case TimeToken.OCT:
case TimeToken.NOV:
case TimeToken.DEC:
/* do month mday [year] */
mon = (token.id - TimeToken.JAN);
expectToken(TimeToken.NUMBER, "the day of the month should follow month name");
mday = long.Parse(token.value);
token = scanner.nextToken();
if (token.id == TimeToken.NUMBER)
{
year = long.Parse(token.value);
token = scanner.nextToken();
}
else
{
year = spec.year;
}
assignDate(mday, mon, year);
break;
case TimeToken.SUN:
case TimeToken.MON:
case TimeToken.TUE:
case TimeToken.WED:
case TimeToken.THU:
case TimeToken.FRI:
case TimeToken.SAT:
/* do a particular day of the week */
int wday = (token.id - TimeToken.SUN);
spec.AddDays(wday - spec.wday);
token = scanner.nextToken();
break;
case TimeToken.NUMBER:
/* get numeric <sec since 1970>, MM/DD/[YY]YY, or DD.MM.[YY]YY */
// int tlen = token.value.length();
mon = long.Parse(token.value);
if (mon > 10L * 365L * 24L * 60L * 60L)
{
spec.localtime(mon);
token = scanner.nextToken();
break;
}
if (mon > 19700101 && mon < 24000101)
{ /*works between 1900 and 2400 */
year = mon / 10000;
mday = mon % 100;
mon = (mon / 100) % 100;
token = scanner.nextToken();
}
else
{
token = scanner.nextToken();
if (mon <= 31 && (token.id == TimeToken.SLASH || token.id == TimeToken.DOT))
{
int sep = token.id;
expectToken(TimeToken.NUMBER, "there should be " +
(sep == TimeToken.DOT ? "month" : "day") +
" number after " +
(sep == TimeToken.DOT ? '.' : '/'));
mday = long.Parse(token.value);
token = scanner.nextToken();
if (token.id == sep)
{
expectToken(TimeToken.NUMBER, "there should be year number after " +
(sep == TimeToken.DOT ? '.' : '/'));
year = long.Parse(token.value);
token = scanner.nextToken();
}
/* flip months and days for European timing */
if (sep == TimeToken.DOT)
{
long x = mday;
mday = mon;
mon = x;
}
}
}
//mon--;
if (mon < 1 || mon > 12)
{
throw new ArgumentException("Did you really mean month " + (mon));
}
if (mday < 1 || mday > 31)
{
throw new ArgumentException("I'm afraid that " + mday + " is not a valid day of the month");
}
assignDate(mday, mon, year);
break;
}
}
private void timeOfDay()
{
int minute = 0;
/* save token status in case we must abort */
scanner.saveState();
/* first pick out the time of day - we assume a HH (COLON|DOT) MM time */
if (token.value.Length > 2)
{
return;
}
int hour = int.Parse(token.value);
token = scanner.nextToken();
if (token.id == TimeToken.SLASH || token.id == TimeToken.DOT)
{
/* guess we are looking at a date */
token = scanner.restoreState();
return;
}
if (token.id == TimeToken.COLON)
{
expectToken(TimeToken.NUMBER, "Parsing HH:MM syntax, expecting MM as number, got none");
minute = int.Parse(token.value);
if (minute > 59)
{
throw new ArgumentException("Parsing HH:MM syntax, got MM = " + minute + " (>59!)");
}
token = scanner.nextToken();
}
/* check if an AM or PM specifier was given */
if (token.id == TimeToken.AM || token.id == TimeToken.PM)
{
if (hour > 12)
{
throw new ArgumentException("There cannot be more than 12 AM or PM hours");
}
if (token.id == TimeToken.PM)
{
if (hour != 12)
{
/* 12:xx PM is 12:xx, not 24:xx */
hour += 12;
}
}
else
{
if (hour == 12)
{
/* 12:xx AM is 00:xx, not 12:xx */
hour = 0;
}
}
token = scanner.nextToken();
}
else if (hour > 23)
{
/* guess it was not a time then ... */
token = scanner.restoreState();
return;
}
spec.hour = hour;
spec.min = minute;
spec.sec = 0;
if (spec.hour == 24)
{
spec.hour = 0;
spec.AddDays(1);
}
}
internal TimeToken restoreState()
{
pos = pos_save;
return token = token_save;
}
internal TimeToken resolveMonthsMinutes(int newId)
{
if (token.id != TimeToken.MONTHS_MINUTES) throw new ApplicationException("token id not MONTHS_MINUTES");
if (newId != TimeToken.MONTHS && newId != TimeToken.MINUTES) throw new ApplicationException("new token id not MONTHS_MINUTES || MONTHS");
return token = new TimeToken(token.value, newId);
}
internal TimeToken nextToken()
{
StringBuilder buffer = new StringBuilder("");
while (pos < dateString.Length)
{
char c = dateString[pos++];
if (char.IsWhiteSpace(c) || c == '_' || c == ',')
{
continue;
}
buffer.Append(c);
if (char.IsDigit(c))
{
// pick as many digits as possible
while (pos < dateString.Length)
{
char next = dateString[pos];
if (char.IsDigit(next))
{
buffer.Append(next);
pos++;
}
else
{
break;
}
}
String value = buffer.ToString();
return token = new TimeToken(value, TimeToken.NUMBER);
}
if (char.IsLetter(c))
{
// pick as many letters as possible
while (pos < dateString.Length)
{
char next = dateString[pos];
if (char.IsLetter(next))
{
buffer.Append(next);
pos++;
}
else
{
break;
}
}
String value = buffer.ToString();
return token = new TimeToken(value, parseToken(value));
}
switch (c)
{
case ':':
return token = new TimeToken(":", TimeToken.COLON);
case '.':
return token = new TimeToken(".", TimeToken.DOT);
case '+':
return token = new TimeToken("+", TimeToken.PLUS);
case '-':
return token = new TimeToken("-", TimeToken.MINUS);
case '/':
return token = new TimeToken("/", TimeToken.SLASH);
default:
pos--;
return token = new TimeToken(null, TimeToken.EOF);
}
}
return token = new TimeToken(null, TimeToken.EOF);
}
private void plusMinus(int doop)
{
if (doop >= 0)
{
op = doop;
expectToken(TimeToken.NUMBER, "There should be number after " +
(op == TimeToken.PLUS ? '+' : '-'));
prev_multiplier = -1; /* reset months-minutes guessing mechanics */
}
int delta = int.Parse(token.value);
token = scanner.nextToken();
if (token.id == TimeToken.MONTHS_MINUTES)
{
/* hard job to guess what does that -5m means: -5mon or -5min? */
switch (prev_multiplier)
{
case TimeToken.DAYS:
case TimeToken.WEEKS:
case TimeToken.MONTHS:
case TimeToken.YEARS:
token = scanner.resolveMonthsMinutes(TimeToken.MONTHS);
break;
case TimeToken.SECONDS:
case TimeToken.MINUTES:
case TimeToken.HOURS:
token = scanner.resolveMonthsMinutes(TimeToken.MINUTES);
break;
default:
token = delta < 6 ? scanner.resolveMonthsMinutes(TimeToken.MONTHS) : scanner.resolveMonthsMinutes(TimeToken.MINUTES);
break;
}
}
prev_multiplier = token.id;
delta *= (op == TimeToken.PLUS) ? +1 : -1;
switch (token.id)
{
case TimeToken.YEARS:
spec.dyear += delta;
return;
case TimeToken.MONTHS:
spec.dmonth += delta;
return;
case TimeToken.WEEKS:
delta *= 7;
spec.dday += delta;
break;
/* FALLTHRU */
case TimeToken.DAYS:
spec.dday += delta;
return;
case TimeToken.HOURS:
spec.dhour += delta;
return;
case TimeToken.MINUTES:
spec.dmin += delta;
return;
default: // default is 'seconds'
spec.dsec += delta;
break;
}
}
/**
* Parses the input string specified in the constructor.
* @return Object representing parsed date/time.
*/
public TimeSpec parse()
{
long now = DateTime.Now.Ticks / TimeSpan.TicksPerSecond;
int hr = 0;
int time_reference;
/* this MUST be initialized to zero for midnight/noon/teatime */
/* establish the default time reference */
spec.localtime(now);
token = scanner.nextToken();
switch (token.id)
{
case TimeToken.PLUS:
case TimeToken.MINUS:
break; /* jump to OFFSET-SPEC part */
case TimeToken.START:
spec.type = TimeSpec.TYPE_START;
if (spec.type != TimeSpec.TYPE_START)
{
spec.type = TimeSpec.TYPE_END;
}
spec.year = spec.month = spec.day = spec.hour = spec.min = spec.sec = 0;
time_reference = token.id;
token = scanner.nextToken();
if (token.id == TimeToken.PLUS || token.id == TimeToken.MINUS)
{
break;
}
if (time_reference != TimeToken.NOW) throw new ArgumentException("Words 'start' or 'end' MUST be followed by +|- offset");
if (token.id != TimeToken.EOF) throw new ArgumentException("If 'now' is followed by a token it must be +|- offset");
break;
/* FALLTHRU */
case TimeToken.END:
if (spec.type != TimeSpec.TYPE_START)
{
spec.type = TimeSpec.TYPE_END;
}
spec.year = spec.month = spec.day = spec.hour = spec.min = spec.sec = 0;
time_reference = token.id;
token = scanner.nextToken();
if (token.id == TimeToken.PLUS || token.id == TimeToken.MINUS)
break;
if (time_reference != TimeToken.NOW) throw new ArgumentException("Words 'start' or 'end' MUST be followed by +|- offset");
if (token.id != TimeToken.EOF) throw new ArgumentException("If 'now' is followed by a token it must be +|- offset");
break;
/* FALLTHRU */
case TimeToken.NOW:
time_reference = token.id;
token = scanner.nextToken();
if (token.id == TimeToken.PLUS || token.id == TimeToken.MINUS)
break;
if (time_reference != TimeToken.NOW) throw new ArgumentException("Words 'start' or 'end' MUST be followed by +|- offset");
if (token.id != TimeToken.EOF) throw new ArgumentException("If 'now' is followed by a token it must be +|- offset");
break;
/* Only absolute time specifications below */
case TimeToken.NUMBER:
timeOfDay();
if (token.id == TimeToken.PLUS || token.id == TimeToken.MINUS)
{
break;
}
day();
if (token.id != TimeToken.NUMBER)
{
break;
}
timeOfDay();
break;
/* fix month parsing */
case TimeToken.JAN:
case TimeToken.FEB:
case TimeToken.MAR:
case TimeToken.APR:
case TimeToken.MAY:
case TimeToken.JUN:
case TimeToken.JUL:
case TimeToken.AUG:
case TimeToken.SEP:
case TimeToken.OCT:
case TimeToken.NOV:
case TimeToken.DEC:
day();
if (token.id != TimeToken.NUMBER)
{
break;
}
timeOfDay();
break;
/* evil coding for TEATIME|NOON|MIDNIGHT - we've initialized
* hr to zero up above, then fall into this case in such a
* way so we add +12 +4 hours to it for teatime, +12 hours
* to it for noon, and nothing at all for midnight, then
* set our rettime to that hour before leaping into the
* month scanner
*/
case TimeToken.TEATIME:
hr += 4;
hr += 12;
spec.hour = hr;
spec.min = 0;
spec.sec = 0;
token = scanner.nextToken();
day();
break;
/* FALLTHRU */
case TimeToken.NOON:
hr += 12;
spec.hour = hr;
spec.min = 0;
spec.sec = 0;
token = scanner.nextToken();
day();
break;
/* FALLTHRU */
case TimeToken.MIDNIGHT:
spec.hour = hr;
spec.min = 0;
spec.sec = 0;
token = scanner.nextToken();
day();
break;
default:
throw new ArgumentException("Unparsable time: " + token.value);
}
/*
* the OFFSET-SPEC part
*
* (NOTE, the sc_tokid was prefetched for us by the previous code)
*/
if (token.id == TimeToken.PLUS || token.id == TimeToken.MINUS)
{
scanner.setContext(false);
while (token.id == TimeToken.PLUS || token.id == TimeToken.MINUS ||
token.id == TimeToken.NUMBER)
{
if (token.id == TimeToken.NUMBER)
{
plusMinus(PREVIOUS_OP);
}
else
{
plusMinus(token.id);
}
token = scanner.nextToken();
/* We will get EOF eventually but that's OK, since
token() will return us as many EOFs as needed */
}
}
/* now we should be at EOF */
if (token.id != TimeToken.EOF) throw new ArgumentException("Unparsable trailing text: " + token.value);
return spec;
}
private void day()
{
long mday = 0;
long mon, year = spec.year;
switch (token.id)
{
case TimeToken.YESTERDAY:
spec.RemoveDays(1);
token = scanner.nextToken();
break;
/* FALLTRHU */
case TimeToken.TODAY: /* force ourselves to stay in today - no further processing */
token = scanner.nextToken();
break;
case TimeToken.TOMORROW:
spec.AddDays(1);
token = scanner.nextToken();
break;
case TimeToken.JAN:
case TimeToken.FEB:
case TimeToken.MAR:
case TimeToken.APR:
case TimeToken.MAY:
case TimeToken.JUN:
case TimeToken.JUL:
case TimeToken.AUG:
case TimeToken.SEP:
case TimeToken.OCT:
case TimeToken.NOV:
case TimeToken.DEC:
/* do month mday [year] */
mon = (token.id - TimeToken.JAN);
expectToken(TimeToken.NUMBER, "the day of the month should follow month name");
mday = long.Parse(token.value);
token = scanner.nextToken();
if (token.id == TimeToken.NUMBER)
{
year = long.Parse(token.value);
token = scanner.nextToken();
}
else
{
year = spec.year;
}
assignDate(mday, mon, year);
break;
case TimeToken.SUN:
case TimeToken.MON:
case TimeToken.TUE:
case TimeToken.WED:
case TimeToken.THU:
case TimeToken.FRI:
case TimeToken.SAT:
/* do a particular day of the week */
int wday = (token.id - TimeToken.SUN);
spec.AddDays(wday - spec.wday);
token = scanner.nextToken();
break;
case TimeToken.NUMBER:
/* get numeric <sec since 1970>, MM/DD/[YY]YY, or DD.MM.[YY]YY */
// int tlen = token.value.length();
mon = long.Parse(token.value);
if (mon > 10L * 365L * 24L * 60L * 60L)
{
spec.localtime(mon);
token = scanner.nextToken();
break;
}
if (mon > 19700101 && mon < 24000101)
{ /*works between 1900 and 2400 */
year = mon / 10000;
mday = mon % 100;
mon = (mon / 100) % 100;
token = scanner.nextToken();
}
else
{
token = scanner.nextToken();
if (mon <= 31 && (token.id == TimeToken.SLASH || token.id == TimeToken.DOT))
{
int sep = token.id;
expectToken(TimeToken.NUMBER, "there should be " +
(sep == TimeToken.DOT ? "month" : "day") +
" number after " +
(sep == TimeToken.DOT ? '.' : '/'));
mday = long.Parse(token.value);
token = scanner.nextToken();
if (token.id == sep)
{
expectToken(TimeToken.NUMBER, "there should be year number after " +
(sep == TimeToken.DOT ? '.' : '/'));
year = long.Parse(token.value);
token = scanner.nextToken();
}
/* flip months and days for European timing */
if (sep == TimeToken.DOT)
{
long x = mday;
mday = mon;
mon = x;
}
}
}
//mon--;
if (mon < 1 || mon > 12)
{
throw new ArgumentException("Did you really mean month " + (mon));
}
if (mday < 1 || mday > 31)
{
throw new ArgumentException("I'm afraid that " + mday + " is not a valid day of the month");
}
assignDate(mday, mon, year);
break;
}
}
private void timeOfDay()
{
int minute = 0;
/* save token status in case we must abort */
scanner.saveState();
/* first pick out the time of day - we assume a HH (COLON|DOT) MM time */
if (token.value.Length > 2)
{
return;
}
int hour = int.Parse(token.value);
token = scanner.nextToken();
if (token.id == TimeToken.SLASH || token.id == TimeToken.DOT)
{
/* guess we are looking at a date */
token = scanner.restoreState();
return;
}
if (token.id == TimeToken.COLON)
{
expectToken(TimeToken.NUMBER, "Parsing HH:MM syntax, expecting MM as number, got none");
minute = int.Parse(token.value);
if (minute > 59)
{
throw new ArgumentException("Parsing HH:MM syntax, got MM = " + minute + " (>59!)");
}
token = scanner.nextToken();
}
/* check if an AM or PM specifier was given */
if (token.id == TimeToken.AM || token.id == TimeToken.PM)
{
if (hour > 12)
{
throw new ArgumentException("There cannot be more than 12 AM or PM hours");
}
if (token.id == TimeToken.PM)
{
if (hour != 12)
{
/* 12:xx PM is 12:xx, not 24:xx */
hour += 12;
}
}
else
{
if (hour == 12)
{
/* 12:xx AM is 00:xx, not 12:xx */
hour = 0;
}
}
token = scanner.nextToken();
}
else if (hour > 23)
{
/* guess it was not a time then ... */
token = scanner.restoreState();
return;
}
spec.hour = hour;
spec.min = minute;
spec.sec = 0;
if (spec.hour == 24)
{
spec.hour = 0;
spec.AddDays(1);
}
}
internal TimeToken restoreState()
{
pos = pos_save;
return(token = token_save);
}
internal TimeToken nextToken()
{
StringBuilder buffer = new StringBuilder("");
while (pos < dateString.Length)
{
char c = dateString[pos++];
if (char.IsWhiteSpace(c) || c == '_' || c == ',')
{
continue;
}
buffer.Append(c);
if (char.IsDigit(c))
{
// pick as many digits as possible
while (pos < dateString.Length)
{
char next = dateString[pos];
if (char.IsDigit(next))
{
buffer.Append(next);
pos++;
}
else
{
break;
}
}
String value = buffer.ToString();
return(token = new TimeToken(value, TimeToken.NUMBER));
}
if (char.IsLetter(c))
{
// pick as many letters as possible
while (pos < dateString.Length)
{
char next = dateString[pos];
if (char.IsLetter(next))
{
buffer.Append(next);
pos++;
}
else
{
break;
}
}
String value = buffer.ToString();
return(token = new TimeToken(value, parseToken(value)));
}
switch (c)
{
case ':':
return(token = new TimeToken(":", TimeToken.COLON));
case '.':
return(token = new TimeToken(".", TimeToken.DOT));
case '+':
return(token = new TimeToken("+", TimeToken.PLUS));
case '-':
return(token = new TimeToken("-", TimeToken.MINUS));
case '/':
return(token = new TimeToken("/", TimeToken.SLASH));
default:
pos--;
return(token = new TimeToken(null, TimeToken.EOF));
}
}
return(token = new TimeToken(null, TimeToken.EOF));
}
