https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103612
Bug ID: 103612
Summary: get_time parsing error for two digits year
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: pyaggi at gmail dot com
Target Milestone: ---
std::get_time is behaving in the same way when the format includes '%y' or
'%Y', in both cases it tries to read a four digit year.
Example Code:
-------------
#include <iostream>
#include <iomanip>
void testDate(const char *format,const char *date)
{
std::istringstream ds(date);
std::tm tm = {};
ds >> std::get_time(&tm,format);
std::cout<<date<<" parsed using "<<format<<" -> Year: "<<tm.tm_year+1900<<"
Month: "<<tm.tm_mon<<" Day: "<<tm.tm_mday<<std::endl;
}
int main()
{
testDate("%y%m%d","101112");
testDate("%Y%m%d","101112");
testDate("%y%m%d","20101112");
testDate("%Y%m%d","20101112");
return 0;
}
Output:
-------
101112 parsed using %y%m%d -> Year: 1011 Month: 11 Day: 0
101112 parsed using %Y%m%d -> Year: 1011 Month: 11 Day: 0
20101112 parsed using %y%m%d -> Year: 2010 Month: 10 Day: 12
20101112 parsed using %Y%m%d -> Year: 2010 Month: 10 Day: 12
Tested with:
------------
g++ (SUSE Linux) 11.2.1 20210816
clang++ version 12.0.1
