From bd0f3345a938b35ce6a12f6150373b0955b8dd12 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Sun, 10 Jul 2011 15:24:15 -0500 Subject: Add Qt3 development HEAD version --- doc/html/y2k.html | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 doc/html/y2k.html (limited to 'doc/html/y2k.html') diff --git a/doc/html/y2k.html b/doc/html/y2k.html new file mode 100644 index 0000000..706e485 --- /dev/null +++ b/doc/html/y2k.html @@ -0,0 +1,82 @@ + + + + + +Year 2000 Compliance Statement + + + + + + + +

Year 2000 Compliance Statement

+ + +

Trolltech defines Year 2000 Compliance as a requirement that a +product or part of product does not contain errors related to +transition from December 31, 1999 to January 1, 2000, or to the +existence of February 29, 2000. +

This document certifies that the API provided by Qt and the +implementation of Qt are both Year 2000 Compliant, and that the use of +underlying APIs by Qt does not have any known problems. +

The API Provided by Qt +

Several parts of Qt deal with dates and times: +

QDate - provides date management +
QDateTime - provides date/time management +
QTime - provides time management (within a date) +
QTimer - provides delayed or regular execution of code. +

All of these classes' external APIs are Year 2000 Compliant: QDate and +QDateTime offer only four-digit years as output, QTime and QTimer do +not deal with years or leap days at all. +

Implementation Issues in Qt +

All date/time calculation and storage in Qt uses number of days, +seconds or milliseconds, and is thus Year 2000 Compliant. +

This applies to the above four classes and also to QFileDialog +(which can sort files by time/date), QFileInfo (which operates on +file times/dates) and QApplication (which does various internal +housekeeping tasks). +

The conversion to year/month/date format in QDate (and +QDateTime) has been verified to be correct for all of December 31, +1999, January 1, 2000, February 28 and 29, 2000, March 1, 2000, +January 1, 2001 and March 1, 2001. +

Qt has been verified to be robust in case of time/date errors (such as +time warps) in the underlying operating system. +

Use of System APIs +

It is of course impossible for Trolltech to ensure that both of the +window systems and all of the operating systems on which Qt runs are +Year 2000 Compliant. However, Qt does not use any APIs that are known +to have any Year 2000-related bugs, or seem at risk to have any. + + +

+ +

Trademarks +

Qt 3.3.8

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