String LocaleWin::formatDate(const Vector<DateFormatToken>& tokens, int baseYear, int year, int month, int day)
{
ensureShortMonthLabels();
ensureMonthLabels();
StringBuilder buffer;
for (unsigned i = 0; i < tokens.size(); ++i) {
switch (tokens[i].type) {
case DateFormatToken::Literal:
buffer.append(tokens[i].data);
break;
case DateFormatToken::Day1:
appendNumber(day, buffer);
break;
case DateFormatToken::Day2:
appendTwoDigitsNumber(day, buffer);
break;
case DateFormatToken::Month1:
appendNumber(month + 1, buffer);
break;
case DateFormatToken::Month2:
appendTwoDigitsNumber(month + 1, buffer);
break;
case DateFormatToken::Month3:
if (0 <= month && month < static_cast<int>(m_shortMonthLabels.size()))
buffer.append(m_shortMonthLabels[month]);
else
appendNumber(month + 1, buffer);
break;
case DateFormatToken::Month4:
if (0 <= month && month < static_cast<int>(m_monthLabels.size()))
buffer.append(m_monthLabels[month]);
else
appendNumber(month + 1, buffer);
break;
case DateFormatToken::Year1: {
if (baseYear - 4 <= year && year <= baseYear + 5)
appendNumber(year % 10, buffer);
else
appendFourDigitsNumber(year, buffer);
break;
}
case DateFormatToken::Year2: {
if (baseYear - 49 <= year && year <= baseYear + 50)
appendTwoDigitsNumber(year % 100, buffer);
else
appendFourDigitsNumber(year, buffer);
break;
}
case DateFormatToken::Year4:
appendFourDigitsNumber(year, buffer);
break;
}
}
return buffer.toString();
}
const Vector<String>& LocaleWin::shortMonthLabels() {
ensureShortMonthLabels();
return m_shortMonthLabels;
}
double LocaleWin::parseDate(const Vector<DateFormatToken>& tokens, int baseYear, const String& input)
{
ensureShortMonthLabels();
ensureMonthLabels();
const double NaN = numeric_limits<double>::quiet_NaN();
unsigned inputIndex = 0;
int day = -1, month = -1, year = -1;
for (unsigned i = 0; i < tokens.size(); ++i) {
switch (tokens[i].type) {
case DateFormatToken::Literal: {
String data = tokens[i].data;
unsigned literalLength = data.length();
if (input.substring(inputIndex, literalLength) == data)
inputIndex += literalLength;
// Go ahead even if the input doesn't have this string.
break;
}
case DateFormatToken::Day1:
case DateFormatToken::Day2:
day = parseNumber(input, inputIndex);
if (day < 1 || day > 31)
return NaN;
break;
case DateFormatToken::Month1:
case DateFormatToken::Month2:
case DateFormatToken::Month3:
case DateFormatToken::Month4:
month = parseNumberOrMonth(input, inputIndex);
if (month < 0 || month > 11)
return NaN;
break;
case DateFormatToken::Year1: {
unsigned oldIndex = inputIndex;
year = parseNumber(input, inputIndex);
if (year <= 0)
return NaN;
if (inputIndex - oldIndex == 1) {
int shortYear = baseYear % 10;
int decade = baseYear - shortYear;
if (shortYear >= 5)
year += shortYear - 4 <= year ? decade : decade + 10;
else
year += shortYear + 5 >= year ? decade : decade - 10;
}
break;
}
case DateFormatToken::Year2: {
unsigned oldIndex = inputIndex;
year = parseNumber(input, inputIndex);
if (year <= 0)
return NaN;
if (inputIndex - oldIndex == 2) {
int shortYear = baseYear % 100;
int century = baseYear - shortYear;
if (shortYear >= 50)
year += shortYear - 49 <= year ? century : century + 100;
else
year += shortYear + 50 >= year ? century : century - 100;
}
break;
}
case DateFormatToken::Year4:
year = parseNumber(input, inputIndex);
if (year <= 0)
return NaN;
break;
}
}
if (year <= 0 || month < 0 || day <= 0)
return NaN;
return dateToDaysFrom1970(year, month, day) * msPerDay;
}
