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miniz is built with MINIZ_NO_TIME so that saving the same project twice gives the same bytes. Without a clock it writes 0 as each entry's DOS date: day 0 of month 0, 1980, which is not a date. Unzip tools show it as 30 Nov 1979, others fail the conversion and show 13 Dec 1901 (reported on PR #1462). Write 1 Jan 1980 00:00, the first valid DOS date, into the local and central header of every entry once the archive is built. The bytes stay reproducible, and miniz stays unmodified. Using the save time instead was rejected: two saves would no longer give the same file, and miniz converts through the local time zone, so even a fixed time_t would differ between machines. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
56 lines
2.0 KiB
C++
56 lines
2.0 KiB
C++
/*
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Copyright 2006-2026 The QElectroTech Team
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This file is part of QElectroTech.
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QElectroTech is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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QElectroTech is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with QElectroTech. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef QETZIP_H
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#define QETZIP_H
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#include <QByteArray>
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#include <QList>
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#include <QString>
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/**
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@brief The QetZip namespace
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Reads and writes the zip file a .qetz project is stored in: plain ZIP,
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Deflate, as ODF and OOXML documents are, so any unzip tool opens it.
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A whole archive is read into, or written from, memory -- projects are
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megabytes, not gigabytes -- and written through QSaveFile, so a failed
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save leaves the previous file as it was.
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Every entry is dated 1 Jan 1980 00:00, not the time of saving: saving
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the same project twice gives the same bytes.
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*/
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namespace QetZip
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{
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struct Entry
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{
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QString name; ///< path inside the archive, '/'-separated
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QByteArray data;
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bool compress = true; ///< false: stored (pictures, the mimetype entry)
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};
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/// Largest archive read(): uncompressed total and entry count
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constexpr qint64 MaxUncompressedSize = qint64(2) * 1024 * 1024 * 1024;
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constexpr int MaxEntries = 100000;
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bool write(const QString &path, const QList<Entry> &entries, QString *error = nullptr);
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QByteArray toBytes(const QList<Entry> &entries, QString *error = nullptr);
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bool read(const QString &path, QList<Entry> *entries, QString *error = nullptr);
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bool fromBytes(const QByteArray &zip, QList<Entry> *entries, QString *error = nullptr);
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}
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#endif // QETZIP_H
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