Function zipDataIsValid

src/Gui/DocumentRecovery.cpp:490–511

Rough check to see if the ZIP data is valid. No CRC calculation, just a fast iteration over the contents to see if it seems basically OK.

/// Rough check to see if the ZIP data is valid. No CRC calculation, just a fast iteration over the
/// contents to see if it seems basically OK.
bool zipDataIsValid(const QString& fcstdFile)
{
    try {
        zipios::ZipFile zf(fcstdFile.toStdString());
        auto entries = zf.entries();
        int n = 0;
        for (auto it = entries.begin(); it != entries.end(); ++it) {
            auto s = zf.getInputStream(*it);
            if (!s || !(*s)) {
                return false;
            }
            ++n;
        }
        if (n == 0) {
            return false;
        }
        return true;
    }
    catch (...) {
        return false;
    }
}

static zipios::ConstEntryPointer findEntry(zipios::ZipFile& zf, const std::string& name)
{