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Code Issues Releases Wiki Activity

Add conversions to ISO-8601 date format

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This commit is contained in:
Jay Berkenbilt 2022-05-30 09:00:36 -04:00
parent 6a7c458381
commit 04fc7c4bea
5 changed files with 59 additions and 1 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2022-05-30 Jay Berkenbilt <ejb@ql.org>
* Add QUtil::qpdf_time_to_iso8601 and QUtil::pdf_time_to_iso8601
for converting PDF/qpdf timestamps to ISO-8601 date format.
2022-05-18 Jay Berkenbilt <ejb@ql.org>
* Add QUtil::FileCloser to the public API. This is a simple inline

9
include/qpdf/QUtil.hh
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@ -284,6 +284,10 @@ namespace QUtil
QPDF_DLL
std::string qpdf_time_to_pdf_time(QPDFTime const&);
// Convert QPDFTime to a second-granularity ISO-8601 timestamp.
QPDF_DLL
std::string qpdf_time_to_iso8601(QPDFTime const&);
// Convert a PDF timestamp string to a QPDFTime. If syntactically
// valid, return true and fill in qtm. If not valid, return false,
// and do not modify qtm. If qtm is null, just check the validity
@ -291,6 +295,11 @@ namespace QUtil
QPDF_DLL
bool pdf_time_to_qpdf_time(std::string const&, QPDFTime* qtm = nullptr);
// Convert PDF timestamp to a second-granularity ISO-8601
// timestamp. If syntactically valid, return true and initialize
// iso8601. Otherwise, return false.
bool pdf_time_to_iso8601(std::string const& pdf_time, std::string& iso8601);
// Return a string containing the byte representation of the UTF-8
// encoding for the unicode value passed in.
QPDF_DLL

37
libqpdf/QUtil.cc
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@ -984,6 +984,32 @@ QUtil::qpdf_time_to_pdf_time(QPDFTime const& qtm)
QUtil::int_to_string(qtm.second, 2) + tz_offset);
}
std::string
QUtil::qpdf_time_to_iso8601(QPDFTime const& qtm)
{
std::string tz_offset;
int t = qtm.tz_delta;
if (t == 0) {
tz_offset = "Z";
} else {
if (t < 0) {
t = -t;
tz_offset += "+";
} else {
tz_offset += "-";
}
tz_offset += QUtil::int_to_string(t / 60, 2) + ":" +
QUtil::int_to_string(t % 60, 2);
}
return (
QUtil::int_to_string(qtm.year, 4) + "-" +
QUtil::int_to_string(qtm.month, 2) + "-" +
QUtil::int_to_string(qtm.day, 2) + "T" +
QUtil::int_to_string(qtm.hour, 2) + ":" +
QUtil::int_to_string(qtm.minute, 2) + ":" +
QUtil::int_to_string(qtm.second, 2) + tz_offset);
}
bool
QUtil::pdf_time_to_qpdf_time(std::string const& str, QPDFTime* qtm)
{
@ -1018,6 +1044,17 @@ QUtil::pdf_time_to_qpdf_time(std::string const& str, QPDFTime* qtm)
return true;
}
bool
QUtil::pdf_time_to_iso8601(std::string const& pdf_time, std::string& iso8601)
{
QPDFTime qtm;
if (pdf_time_to_qpdf_time(pdf_time, &qtm)) {
iso8601 = qpdf_time_to_iso8601(qtm);
return true;
}
return false;
}
std::string
QUtil::toUTF8(unsigned long uval)
{

3
libtests/qtest/qutil/qutil.out
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@ -127,7 +127,10 @@ rename over existing
delete file
---- timestamp
D:20210209144925-05'00'
2021-02-09T14:49:25-05:00
D:20210210011925+05'30'
2021-02-10T01:19:25+05:30
D:20210209191925Z
2021-02-09T19:19:25Z
---- is_long_long
done

6
libtests/qutil.cc
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@ -656,10 +656,14 @@ timestamp_test()
{
auto check = [](QUtil::QPDFTime const& t) {
std::string pdf = QUtil::qpdf_time_to_pdf_time(t);
std::cout << pdf << std::endl;
std::string iso8601 = QUtil::qpdf_time_to_iso8601(t);
std::cout << pdf << std::endl << iso8601 << std::endl;
QUtil::QPDFTime t2;
std::string iso8601_2;
assert(QUtil::pdf_time_to_qpdf_time(pdf, &t2));
assert(QUtil::qpdf_time_to_pdf_time(t2) == pdf);
assert(QUtil::pdf_time_to_iso8601(pdf, iso8601_2));
assert(iso8601 == iso8601_2);
};
check(QUtil::QPDFTime(2021, 2, 9, 14, 49, 25, 300));
check(QUtil::QPDFTime(2021, 2, 10, 1, 19, 25, -330));