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Rearrange date parsing in anticipation of calendar work

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The calendar APIs shall need fromShortMonthName() to know its year
number; so rearrange the date parsing that uses it to ensure the year
number is known in time.  In the process, pass &ok to toInt() also for
the calls that get a day number (where failure's 0 return is an
adequate check for failed parse), just to be on the safe side.

Change-Id: Id09c40da9f7e70e68be440e9805a3d30a80977c6
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Edward Welbourne 2019-05-15 15:58:03 +02:00
parent b4ead57250
commit 6f03867d02
1 changed files with 29 additions and 34 deletions
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63
src/corelib/time/qdatetime.cpp
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@ -1516,19 +1516,17 @@ QDate QDate::fromString(const QString &string, Qt::DateFormat format)
if (parts.count() != 4)
return QDate();
QStringRef monthName = parts.at(1);
const int month = fromShortMonthName(monthName);
if (month == -1) {
// Month name matches neither English nor other localised name.
return QDate();
}
bool ok = false;
int year = parts.at(3).toInt(&ok);
if (!ok)
int day = ok ? parts.at(2).toInt(&ok) : 0;
if (!ok || !day)
return QDate();
return QDate(year, month, parts.at(2).toInt());
const int month = fromShortMonthName(parts.at(1));
if (month == -1) // Month name matches no English or localised name.
return QDate();
return QDate(year, month, day);
}
#endif // textdate
case Qt::ISODate: {
@ -5098,48 +5096,45 @@ QDateTime QDateTime::fromString(const QString &string, Qt::DateFormat format)
return QDateTime();
// Accept "Sun Dec 1 13:02:00 1974" and "Sun 1. Dec 13:02:00 1974"
// Year and time can be in either order.
// Guess which by looking for ':' in the time
int yearPart = 3;
int timePart = 3;
if (parts.at(3).contains(QLatin1Char(':')))
yearPart = 4;
else if (parts.at(4).contains(QLatin1Char(':')))
timePart = 4;
else
return QDateTime();
int month = 0;
int day = 0;
bool ok = false;
// First try month then day
int year = parts.at(yearPart).toInt(&ok);
if (!ok || year == 0)
return QDateTime();
// Next try month then day
month = fromShortMonthName(parts.at(1));
if (month)
day = parts.at(2).toInt();
day = parts.at(2).toInt(&ok);
// If failed try day then month
if (!month || !day) {
// If failed, try day then month
if (!ok || !month || !day) {
month = fromShortMonthName(parts.at(2));
if (month) {
QStringRef dayStr = parts.at(1);
if (dayStr.endsWith(QLatin1Char('.'))) {
dayStr = dayStr.left(dayStr.size() - 1);
day = dayStr.toInt();
day = dayStr.toInt(&ok);
}
}
}
// If both failed, give up
if (!month || !day)
return QDateTime();
// Year can be before or after time, "Sun Dec 1 1974 13:02:00" or "Sun Dec 1 13:02:00 1974"
// Guess which by looking for ':' in the time
int year = 0;
int yearPart = 0;
int timePart = 0;
if (parts.at(3).contains(QLatin1Char(':'))) {
yearPart = 4;
timePart = 3;
} else if (parts.at(4).contains(QLatin1Char(':'))) {
yearPart = 3;
timePart = 4;
} else {
return QDateTime();
}
year = parts.at(yearPart).toInt(&ok);
if (!ok)
if (!ok || !month || !day)
return QDateTime();
QDate date(year, month, day);