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reproducible builds: honour SOURCE_DATE_EPOCH #273

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reproducible builds: honour SOURCE_DATE_EPOCH #273

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113 changes: 66 additions & 47 deletions PDFWriter/PDFDate.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -182,72 +182,91 @@ void PDFDate::SetToCurrentTime()
{
time_t currentTime;
tm structuredLocalTime;
long timeZoneSecondsDifference;
char *env_SOURCE_DATE_EPOCH = std::getenv("SOURCE_DATE_EPOCH");

time(&currentTime);
SAFE_LOCAL_TIME(structuredLocalTime,currentTime);
if (env_SOURCE_DATE_EPOCH)
{
std::istringstream iss(env_SOURCE_DATE_EPOCH);
iss >> currentTime;
if (iss.fail() || !iss.eof())
{
TRACE_LOG("PDFDate::SetToCurrentTime, Could not parse SOURCE_DATE_EPOCH as integer");
Year = -1;
return;
}

Year = structuredLocalTime.tm_year + 1900;
Month = structuredLocalTime.tm_mon + 1;
Day = structuredLocalTime.tm_mday;
Hour = structuredLocalTime.tm_hour;
Minute = structuredLocalTime.tm_min;
Second = structuredLocalTime.tm_sec;
UTC = eSame;
}
else
{
time(&currentTime);

// if unsuccesful or method unknown don't provide UTC info (currently only knows for WIN32 and OSX
// if unsuccesful or method unknown don't provide UTC info (currently only knows for WIN32 and OSX
long timeZoneSecondsDifference;
#if defined (__MWERKS__) || defined (__GNUC__) || defined(_AIX32) || defined(WIN32)
int status;
int status;
#if !defined(__MWERKS__) // (using c methods)
struct tm *gmTime;
struct tm *gmTime;

time_t localEpoch, gmEpoch;
time_t localEpoch, gmEpoch;

/*First get local epoch time*/
localEpoch = time(NULL);
/*First get local epoch time*/
localEpoch = time(NULL);

/* Using local time epoch get the GM Time */
gmTime = gmtime(&localEpoch);
gmTime->tm_isdst = -1;
/* Convert gm time in to epoch format */
gmEpoch = mktime(gmTime);
/* Using local time epoch get the GM Time */
gmTime = gmtime(&localEpoch);
gmTime->tm_isdst = -1;
/* Convert gm time in to epoch format */
gmEpoch = mktime(gmTime);

timeZoneSecondsDifference =difftime(gmEpoch, localEpoch);
status = 0;
#else // __MWERKS__ (using OSX methods)
CFTimeZoneRef tzRef = ::CFTimeZoneCopySystem();
if (tzRef)
{
CFTimeInterval intervalFromGMT = ::CFTimeZoneGetSecondsFromGMT(tzRef, currentTime);
::CFRelease(tzRef);
timeZoneSecondsDifference = intervalFromGMT;
timeZoneSecondsDifference =difftime(gmEpoch, localEpoch);
status = 0;
}
else
status = -1;
#else // __MWERKS__ (using OSX methods)
CFTimeZoneRef tzRef = ::CFTimeZoneCopySystem();
if (tzRef)
{
CFTimeInterval intervalFromGMT = ::CFTimeZoneGetSecondsFromGMT(tzRef, currentTime);
::CFRelease(tzRef);
timeZoneSecondsDifference = intervalFromGMT;
status = 0;
}
else
status = -1;
#endif

if(0 == status)
{
if(0 == timeZoneSecondsDifference)
if(0 == status)
{
UTC = eSame;
if(0 == timeZoneSecondsDifference)
{
UTC = eSame;
}
else
{
UTC = timeZoneSecondsDifference > 0 ? eEarlier : eLater;
HourFromUTC = (int)(labs(timeZoneSecondsDifference) / 3600);
MinuteFromUTC = (int)((labs(timeZoneSecondsDifference) - (labs(timeZoneSecondsDifference) / 3600)*3600) / 60);
}
}
else
{
UTC = timeZoneSecondsDifference > 0 ? eEarlier : eLater;
HourFromUTC = (int)(labs(timeZoneSecondsDifference) / 3600);
MinuteFromUTC = (int)((labs(timeZoneSecondsDifference) - (labs(timeZoneSecondsDifference) / 3600)*3600) / 60);
UTC = eUndefined;
TRACE_LOG("PDFDate::SetToCurrentTime, Couldn't get UTC.");
}
}
else
{
UTC = eUndefined;
TRACE_LOG("PDFDate::SetToCurrentTime, Couldn't get UTC.");
}

#else
UTC = eUndefined;
UTC = eUndefined;
#endif
}

SAFE_LOCAL_TIME(structuredLocalTime,currentTime);

Year = structuredLocalTime.tm_year + 1900;
Month = structuredLocalTime.tm_mon + 1;
Day = structuredLocalTime.tm_mday;
Hour = structuredLocalTime.tm_hour;
Minute = structuredLocalTime.tm_min;
Second = structuredLocalTime.tm_sec;

}

void PDFDate::ParseString(std::string inValue)
Expand Down Expand Up @@ -315,4 +334,4 @@ void PDFDate::ParseString(std::string inValue)
MinuteFromUTC = Int(inValue.substr(20,2));
}

}
}
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