qzip.cpp

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#include <qglobal.h>

#ifndef QT_NO_TEXTODFWRITER

#include "qzipreader_p.h"
#include "qzipwriter_p.h"
#include <qdatetime.h>
#include <qplatformdefs.h>
#include <qendian.h>
#include <qdebug.h>
#include <qdir.h>

#include <zlib.h>

#if defined(Q_OS_WIN)
#  undef S_IFREG
#  define S_IFREG 0100000
#  ifndef S_IFDIR
#    define S_IFDIR 0040000
#  endif
#  ifndef S_ISDIR
#    define S_ISDIR(x) ((x) & S_IFDIR) > 0
#  endif
#  ifndef S_ISREG
#    define S_ISREG(x) ((x) & 0170000) == S_IFREG
#  endif
#  define S_IFLNK 020000
#  define S_ISLNK(x) ((x) & S_IFLNK) > 0
#  ifndef S_IRUSR
#    define S_IRUSR 0400
#  endif
#  ifndef S_IWUSR
#    define S_IWUSR 0200
#  endif
#  ifndef S_IXUSR
#    define S_IXUSR 0100
#  endif
#  define S_IRGRP 0040
#  define S_IWGRP 0020
#  define S_IXGRP 0010
#  define S_IROTH 0004
#  define S_IWOTH 0002
#  define S_IXOTH 0001
#endif

#if 0
#define ZDEBUG qDebug
#else
#define ZDEBUG if (0) qDebug
#endif

QT_BEGIN_NAMESPACE

static inline uint readUInt(const uchar *data)
{
    return (data[0]) + (data[1]<<8) + (data[2]<<16) + (data[3]<<24);
}

static inline ushort readUShort(const uchar *data)
{
    return (data[0]) + (data[1]<<8);
}

static inline void writeUInt(uchar *data, uint i)
{
    data[0] = i & 0xff;
    data[1] = (i>>8) & 0xff;
    data[2] = (i>>16) & 0xff;
    data[3] = (i>>24) & 0xff;
}

static inline void writeUShort(uchar *data, ushort i)
{
    data[0] = i & 0xff;
    data[1] = (i>>8) & 0xff;
}

static inline void copyUInt(uchar *dest, const uchar *src)
{
    dest[0] = src[0];
    dest[1] = src[1];
    dest[2] = src[2];
    dest[3] = src[3];
}

static inline void copyUShort(uchar *dest, const uchar *src)
{
    dest[0] = src[0];
    dest[1] = src[1];
}

static void writeMSDosDate(uchar *dest, const QDateTime& dt)
{
    if (dt.isValid()) {
        quint16 time =
            (dt.time().hour() << 11)    // 5 bit hour
            | (dt.time().minute() << 5)   // 6 bit minute
            | (dt.time().second() >> 1);  // 5 bit double seconds

        dest[0] = time & 0xff;
        dest[1] = time >> 8;

        quint16 date =
            ((dt.date().year() - 1980) << 9) // 7 bit year 1980-based
            | (dt.date().month() << 5)           // 4 bit month
            | (dt.date().day());                 // 5 bit day

        dest[2] = char(date);
        dest[3] = char(date >> 8);
    } else {
        dest[0] = 0;
        dest[1] = 0;
        dest[2] = 0;
        dest[3] = 0;
    }
}

static quint32 permissionsToMode(QFile::Permissions perms)
{
    quint32 mode = 0;
    if (perms & QFile::ReadOwner)
        mode |= S_IRUSR;
    if (perms & QFile::WriteOwner)
        mode |= S_IWUSR;
    if (perms & QFile::ExeOwner)
        mode |= S_IXUSR;
    if (perms & QFile::ReadUser)
        mode |= S_IRUSR;
    if (perms & QFile::WriteUser)
        mode |= S_IWUSR;
    if (perms & QFile::ExeUser)
        mode |= S_IXUSR;
    if (perms & QFile::ReadGroup)
        mode |= S_IRGRP;
    if (perms & QFile::WriteGroup)
        mode |= S_IWGRP;
    if (perms & QFile::ExeGroup)
        mode |= S_IXGRP;
    if (perms & QFile::ReadOther)
        mode |= S_IROTH;
    if (perms & QFile::WriteOther)
        mode |= S_IWOTH;
    if (perms & QFile::ExeOther)
        mode |= S_IXOTH;
    return mode;
}

static int inflate(Bytef *dest, ulong *destLen, const Bytef *source, ulong sourceLen)
{
    z_stream stream;
    int err;

    stream.next_in = (Bytef*)source;
    stream.avail_in = (uInt)sourceLen;
    if ((uLong)stream.avail_in != sourceLen)
        return Z_BUF_ERROR;

    stream.next_out = dest;
    stream.avail_out = (uInt)*destLen;
    if ((uLong)stream.avail_out != *destLen)
        return Z_BUF_ERROR;

    stream.zalloc = (alloc_func)0;
    stream.zfree = (free_func)0;

    err = inflateInit2(&stream, -MAX_WBITS);
    if (err != Z_OK)
        return err;

    err = inflate(&stream, Z_FINISH);
    if (err != Z_STREAM_END) {
        inflateEnd(&stream);
        if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
            return Z_DATA_ERROR;
        return err;
    }
    *destLen = stream.total_out;

    err = inflateEnd(&stream);
    return err;
}

static int deflate (Bytef *dest, ulong *destLen, const Bytef *source, ulong sourceLen)
{
    z_stream stream;
    int err;

    stream.next_in = (Bytef*)source;
    stream.avail_in = (uInt)sourceLen;
    stream.next_out = dest;
    stream.avail_out = (uInt)*destLen;
    if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;

    stream.zalloc = (alloc_func)0;
    stream.zfree = (free_func)0;
    stream.opaque = (voidpf)0;

    err = deflateInit2(&stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, -MAX_WBITS, 8, Z_DEFAULT_STRATEGY);
    if (err != Z_OK) return err;

    err = deflate(&stream, Z_FINISH);
    if (err != Z_STREAM_END) {
        deflateEnd(&stream);
        return err == Z_OK ? Z_BUF_ERROR : err;
    }
    *destLen = stream.total_out;

    err = deflateEnd(&stream);
    return err;
}

static QFile::Permissions modeToPermissions(quint32 mode)
{
    QFile::Permissions ret;
    if (mode & S_IRUSR)
        ret |= QFile::ReadOwner;
    if (mode & S_IWUSR)
        ret |= QFile::WriteOwner;
    if (mode & S_IXUSR)
        ret |= QFile::ExeOwner;
    if (mode & S_IRUSR)
        ret |= QFile::ReadUser;
    if (mode & S_IWUSR)
        ret |= QFile::WriteUser;
    if (mode & S_IXUSR)
        ret |= QFile::ExeUser;
    if (mode & S_IRGRP)
        ret |= QFile::ReadGroup;
    if (mode & S_IWGRP)
        ret |= QFile::WriteGroup;
    if (mode & S_IXGRP)
        ret |= QFile::ExeGroup;
    if (mode & S_IROTH)
        ret |= QFile::ReadOther;
    if (mode & S_IWOTH)
        ret |= QFile::WriteOther;
    if (mode & S_IXOTH)
        ret |= QFile::ExeOther;
    return ret;
}

static QDateTime readMSDosDate(const uchar *src)
{
    uint dosDate = readUInt(src);
    quint64 uDate;
    uDate = (quint64)(dosDate >> 16);
    uint tm_mday = (uDate & 0x1f);
    uint tm_mon =  ((uDate & 0x1E0) >> 5);
    uint tm_year = (((uDate & 0x0FE00) >> 9) + 1980);
    uint tm_hour = ((dosDate & 0xF800) >> 11);
    uint tm_min =  ((dosDate & 0x7E0) >> 5);
    uint tm_sec =  ((dosDate & 0x1f) << 1);

    return QDateTime(QDate(tm_year, tm_mon, tm_mday), QTime(tm_hour, tm_min, tm_sec));
}

struct LocalFileHeader
{
    uchar signature[4]; //  0x04034b50
    uchar version_needed[2];
    uchar general_purpose_bits[2];
    uchar compression_method[2];
    uchar last_mod_file[4];
    uchar crc_32[4];
    uchar compressed_size[4];
    uchar uncompressed_size[4];
    uchar file_name_length[2];
    uchar extra_field_length[2];
};

struct DataDescriptor
{
    uchar crc_32[4];
    uchar compressed_size[4];
    uchar uncompressed_size[4];
};

struct CentralFileHeader
{
    uchar signature[4]; // 0x02014b50
    uchar version_made[2];
    uchar version_needed[2];
    uchar general_purpose_bits[2];
    uchar compression_method[2];
    uchar last_mod_file[4];
    uchar crc_32[4];
    uchar compressed_size[4];
    uchar uncompressed_size[4];
    uchar file_name_length[2];
    uchar extra_field_length[2];
    uchar file_comment_length[2];
    uchar disk_start[2];
    uchar internal_file_attributes[2];
    uchar external_file_attributes[4];
    uchar offset_local_header[4];
    LocalFileHeader toLocalHeader() const;
};

struct EndOfDirectory
{
    uchar signature[4]; // 0x06054b50
    uchar this_disk[2];
    uchar start_of_directory_disk[2];
    uchar num_dir_entries_this_disk[2];
    uchar num_dir_entries[2];
    uchar directory_size[4];
    uchar dir_start_offset[4];
    uchar comment_length[2];
};

struct FileHeader
{
    CentralFileHeader h;
    QByteArray file_name;
    QByteArray extra_field;
    QByteArray file_comment;
};

QZipReader::FileInfo::FileInfo()
    : isDir(false), isFile(false), isSymLink(false), crc32(0), size(0)
{
}

QZipReader::FileInfo::~FileInfo()
{
}

QZipReader::FileInfo::FileInfo(const FileInfo &other)
{
    operator=(other);
}

QZipReader::FileInfo& QZipReader::FileInfo::operator=(const FileInfo &other)
{
    filePath = other.filePath;
    isDir = other.isDir;
    isFile = other.isFile;
    isSymLink = other.isSymLink;
    permissions = other.permissions;
    crc32 = other.crc32;
    size = other.size;
    lastModified = other.lastModified;
    return *this;
}

bool QZipReader::FileInfo::isValid() const
{
    return isDir || isFile || isSymLink;
}

class QZipPrivate
{
public:
    QZipPrivate(QIODevice *device, bool ownDev)
        : device(device), ownDevice(ownDev), dirtyFileTree(true), start_of_directory(0)
    {
    }

    ~QZipPrivate()
    {
        if (ownDevice)
            delete device;
    }

    void fillFileInfo(int index, QZipReader::FileInfo &fileInfo) const;

    QIODevice *device;
    bool ownDevice;
    bool dirtyFileTree;
    QList<FileHeader> fileHeaders;
    QByteArray comment;
    uint start_of_directory;
};

void QZipPrivate::fillFileInfo(int index, QZipReader::FileInfo &fileInfo) const
{
    FileHeader header = fileHeaders.at(index);
    fileInfo.filePath = QString::fromLocal8Bit(header.file_name);
    const quint32 mode = (qFromLittleEndian<quint32>(&header.h.external_file_attributes[0]) >> 16) & 0xFFFF;
    fileInfo.isDir = S_ISDIR(mode);
    fileInfo.isFile = S_ISREG(mode);
    fileInfo.isSymLink = S_ISLNK(mode);
    fileInfo.permissions = modeToPermissions(mode);
    fileInfo.crc32 = readUInt(header.h.crc_32);
    fileInfo.size = readUInt(header.h.uncompressed_size);
    fileInfo.lastModified = readMSDosDate(header.h.last_mod_file);
}

class QZipReaderPrivate : public QZipPrivate
{
public:
    QZipReaderPrivate(QIODevice *device, bool ownDev)
        : QZipPrivate(device, ownDev), status(QZipReader::NoError)
    {
    }

    void scanFiles();

    QZipReader::Status status;
};

class QZipWriterPrivate : public QZipPrivate
{
public:
    QZipWriterPrivate(QIODevice *device, bool ownDev)
        : QZipPrivate(device, ownDev),
        status(QZipWriter::NoError),
        permissions(QFile::ReadOwner | QFile::WriteOwner),
        compressionPolicy(QZipWriter::AlwaysCompress)
    {
    }

    QZipWriter::Status status;
    QFile::Permissions permissions;
    QZipWriter::CompressionPolicy compressionPolicy;

    enum EntryType { Directory, File, Symlink };

    void addEntry(EntryType type, const QString &fileName, const QByteArray &contents);
};

LocalFileHeader CentralFileHeader::toLocalHeader() const
{
    LocalFileHeader h;
    writeUInt(h.signature, 0x04034b50);
    copyUShort(h.version_needed, version_needed);
    copyUShort(h.general_purpose_bits, general_purpose_bits);
    copyUShort(h.compression_method, compression_method);
    copyUInt(h.last_mod_file, last_mod_file);
    copyUInt(h.crc_32, crc_32);
    copyUInt(h.compressed_size, compressed_size);
    copyUInt(h.uncompressed_size, uncompressed_size);
    copyUShort(h.file_name_length, file_name_length);
    copyUShort(h.extra_field_length, extra_field_length);
    return h;
}

void QZipReaderPrivate::scanFiles()
{
    if (!dirtyFileTree)
        return;

    if (! (device->isOpen() || device->open(QIODevice::ReadOnly))) {
        status = QZipReader::FileOpenError;
        return;
    }

    if ((device->openMode() & QIODevice::ReadOnly) == 0) { // only read the index from readable files.
        status = QZipReader::FileReadError;
        return;
    }

    dirtyFileTree = false;
    uchar tmp[4];
    device->read((char *)tmp, 4);
    if (readUInt(tmp) != 0x04034b50) {
        qWarning() << "QZip: not a zip file!";
        return;
    }

    // find EndOfDirectory header
    int i = 0;
    int start_of_directory = -1;
    int num_dir_entries = 0;
    EndOfDirectory eod;
    while (start_of_directory == -1) {
        int pos = device->size() - sizeof(EndOfDirectory) - i;
        if (pos < 0 || i > 65535) {
            qWarning() << "QZip: EndOfDirectory not found";
            return;
        }

        device->seek(pos);
        device->read((char *)&eod, sizeof(EndOfDirectory));
        if (readUInt(eod.signature) == 0x06054b50)
            break;
        ++i;
    }

    // have the eod
    start_of_directory = readUInt(eod.dir_start_offset);
    num_dir_entries = readUShort(eod.num_dir_entries);
    ZDEBUG("start_of_directory at %d, num_dir_entries=%d", start_of_directory, num_dir_entries);
    int comment_length = readUShort(eod.comment_length);
    if (comment_length != i)
        qWarning() << "QZip: failed to parse zip file.";
    comment = device->read(qMin(comment_length, i));


    device->seek(start_of_directory);
    for (i = 0; i < num_dir_entries; ++i) {
        FileHeader header;
        int read = device->read((char *) &header.h, sizeof(CentralFileHeader));
        if (read < (int)sizeof(CentralFileHeader)) {
            qWarning() << "QZip: Failed to read complete header, index may be incomplete";
            break;
        }
        if (readUInt(header.h.signature) != 0x02014b50) {
            qWarning() << "QZip: invalid header signature, index may be incomplete";
            break;
        }

        int l = readUShort(header.h.file_name_length);
        header.file_name = device->read(l);
        if (header.file_name.length() != l) {
            qWarning() << "QZip: Failed to read filename from zip index, index may be incomplete";
            break;
        }
        l = readUShort(header.h.extra_field_length);
        header.extra_field = device->read(l);
        if (header.extra_field.length() != l) {
            qWarning() << "QZip: Failed to read extra field in zip file, skipping file, index may be incomplete";
            break;
        }
        l = readUShort(header.h.file_comment_length);
        header.file_comment = device->read(l);
        if (header.file_comment.length() != l) {
            qWarning() << "QZip: Failed to read read file comment, index may be incomplete";
            break;
        }

        ZDEBUG("found file '%s'", header.file_name.data());
        fileHeaders.append(header);
    }
}

void QZipWriterPrivate::addEntry(EntryType type, const QString &fileName, const QByteArray &contents/*, QFile::Permissions permissions, QZip::Method m*/)
{
#ifndef NDEBUG
    static const char *entryTypes[] = {
        "directory",
        "file     ",
        "symlink  " };
    ZDEBUG() << "adding" << entryTypes[type] <<":" << fileName.toUtf8().data() << (type == 2 ? QByteArray(" -> " + contents).constData() : "");
#endif

    if (! (device->isOpen() || device->open(QIODevice::WriteOnly))) {
        status = QZipWriter::FileOpenError;
        return;
    }
    device->seek(start_of_directory);

    // don't compress small files
    QZipWriter::CompressionPolicy compression = compressionPolicy;
    if (compressionPolicy == QZipWriter::AutoCompress) {
        if (contents.length() < 64)
            compression = QZipWriter::NeverCompress;
        else
            compression = QZipWriter::AlwaysCompress;
    }

    FileHeader header;
    memset(&header.h, 0, sizeof(CentralFileHeader));
    writeUInt(header.h.signature, 0x02014b50);

    writeUShort(header.h.version_needed, 0x14);
    writeUInt(header.h.uncompressed_size, contents.length());
    writeMSDosDate(header.h.last_mod_file, QDateTime::currentDateTime());
    QByteArray data = contents;
    if (compression == QZipWriter::AlwaysCompress) {
        writeUShort(header.h.compression_method, 8);

       ulong len = contents.length();
        // shamelessly copied form zlib
        len += (len >> 12) + (len >> 14) + 11;
        int res;
        do {
            data.resize(len);
            res = deflate((uchar*)data.data(), &len, (const uchar*)contents.constData(), contents.length());

            switch (res) {
            case Z_OK:
                data.resize(len);
                break;
            case Z_MEM_ERROR:
                qWarning("QZip: Z_MEM_ERROR: Not enough memory to compress file, skipping");
                data.resize(0);
                break;
            case Z_BUF_ERROR:
                len *= 2;
                break;
            }
        } while (res == Z_BUF_ERROR);
    }
// TODO add a check if data.length() > contents.length().  Then try to store the original and revert the compression method to be uncompressed
    writeUInt(header.h.compressed_size, data.length());
    uint crc_32 = ::crc32(0, 0, 0);
    crc_32 = ::crc32(crc_32, (const uchar *)contents.constData(), contents.length());
    writeUInt(header.h.crc_32, crc_32);

    header.file_name = fileName.toLocal8Bit();
    if (header.file_name.size() > 0xffff) {
        qWarning("QZip: Filename too long, chopping it to 65535 characters");
        header.file_name = header.file_name.left(0xffff);
    }
    writeUShort(header.h.file_name_length, header.file_name.length());
    //h.extra_field_length[2];

    writeUShort(header.h.version_made, 3 << 8);
    //uchar internal_file_attributes[2];
    //uchar external_file_attributes[4];
    quint32 mode = permissionsToMode(permissions);
    switch (type) {
        case File: mode |= S_IFREG; break;
        case Directory: mode |= S_IFDIR; break;
        case Symlink: mode |= S_IFLNK; break;
    }
    writeUInt(header.h.external_file_attributes, mode << 16);
    writeUInt(header.h.offset_local_header, start_of_directory);


    fileHeaders.append(header);

    LocalFileHeader h = header.h.toLocalHeader();
    device->write((const char *)&h, sizeof(LocalFileHeader));
    device->write(header.file_name);
    device->write(data);
    start_of_directory = device->pos();
    dirtyFileTree = true;
}


QZipReader::QZipReader(const QString &archive, QIODevice::OpenMode mode)
{
    QScopedPointer<QFile> f(new QFile(archive));
    f->open(mode);
    QZipReader::Status status;
    if (f->error() == QFile::NoError)
        status = NoError;
    else {
        if (f->error() == QFile::ReadError)
            status = FileReadError;
        else if (f->error() == QFile::OpenError)
            status = FileOpenError;
        else if (f->error() == QFile::PermissionsError)
            status = FilePermissionsError;
        else
            status = FileError;
    }

    d = new QZipReaderPrivate(f.data(), /*ownDevice=*/true);
    f.take();
    d->status = status;
}

QZipReader::QZipReader(QIODevice *device)
    : d(new QZipReaderPrivate(device, /*ownDevice=*/false))
{
    Q_ASSERT(device);
}

QZipReader::~QZipReader()
{
    close();
    delete d;
}

QIODevice* QZipReader::device() const
{
    return d->device;
}

bool QZipReader::isReadable() const
{
    return d->device->isReadable();
}

bool QZipReader::exists() const
{
    QFile *f = qobject_cast<QFile*> (d->device);
    if (f == 0)
        return true;
    return f->exists();
}

QList<QZipReader::FileInfo> QZipReader::fileInfoList() const
{
    d->scanFiles();
    QList<QZipReader::FileInfo> files;
    for (int i = 0; i < d->fileHeaders.size(); ++i) {
        QZipReader::FileInfo fi;
        d->fillFileInfo(i, fi);
        files.append(fi);
    }
    return files;

}

int QZipReader::count() const
{
    d->scanFiles();
    return d->fileHeaders.count();
}

QZipReader::FileInfo QZipReader::entryInfoAt(int index) const
{
    d->scanFiles();
    QZipReader::FileInfo fi;
    if (index >= 0 && index < d->fileHeaders.count())
        d->fillFileInfo(index, fi);
    return fi;
}

QByteArray QZipReader::fileData(const QString &fileName) const
{
    d->scanFiles();
    int i;
    for (i = 0; i < d->fileHeaders.size(); ++i) {
        if (QString::fromLocal8Bit(d->fileHeaders.at(i).file_name) == fileName)
            break;
    }
    if (i == d->fileHeaders.size())
        return QByteArray();

    FileHeader header = d->fileHeaders.at(i);

    int compressed_size = readUInt(header.h.compressed_size);
    int uncompressed_size = readUInt(header.h.uncompressed_size);
    int start = readUInt(header.h.offset_local_header);
    //qDebug("uncompressing file %d: local header at %d", i, start);

    d->device->seek(start);
    LocalFileHeader lh;
    d->device->read((char *)&lh, sizeof(LocalFileHeader));
    uint skip = readUShort(lh.file_name_length) + readUShort(lh.extra_field_length);
    d->device->seek(d->device->pos() + skip);

    int compression_method = readUShort(lh.compression_method);
    //qDebug("file=%s: compressed_size=%d, uncompressed_size=%d", fileName.toLocal8Bit().data(), compressed_size, uncompressed_size);

    //qDebug("file at %lld", d->device->pos());
    QByteArray compressed = d->device->read(compressed_size);
    if (compression_method == 0) {
        // no compression
        compressed.truncate(uncompressed_size);
        return compressed;
    } else if (compression_method == 8) {
        // Deflate
        //qDebug("compressed=%d", compressed.size());
        compressed.truncate(compressed_size);
        QByteArray baunzip;
        ulong len = qMax(uncompressed_size,  1);
        int res;
        do {
            baunzip.resize(len);
            res = inflate((uchar*)baunzip.data(), &len,
                          (uchar*)compressed.constData(), compressed_size);

            switch (res) {
            case Z_OK:
                if ((int)len != baunzip.size())
                    baunzip.resize(len);
                break;
            case Z_MEM_ERROR:
                qWarning("QZip: Z_MEM_ERROR: Not enough memory");
                break;
            case Z_BUF_ERROR:
                len *= 2;
                break;
            case Z_DATA_ERROR:
                qWarning("QZip: Z_DATA_ERROR: Input data is corrupted");
                break;
            }
        } while (res == Z_BUF_ERROR);
        return baunzip;
    }
    qWarning() << "QZip: Unknown compression method";
    return QByteArray();
}

bool QZipReader::extractAll(const QString &destinationDir) const
{
    QDir baseDir(destinationDir);

    // create directories first
    QList<FileInfo> allFiles = fileInfoList();
    foreach (FileInfo fi, allFiles) {
        const QString absPath = destinationDir + QDir::separator() + fi.filePath;
        if (fi.isDir) {
            if (!baseDir.mkpath(fi.filePath))
                return false;
            if (!QFile::setPermissions(absPath, fi.permissions))
                return false;
        }
    }

    // set up symlinks
    foreach (FileInfo fi, allFiles) {
        const QString absPath = destinationDir + QDir::separator() + fi.filePath;
        if (fi.isSymLink) {
            QString destination = QFile::decodeName(fileData(fi.filePath));
            if (destination.isEmpty())
                return false;
            QFileInfo linkFi(absPath);
            if (!QFile::exists(linkFi.absolutePath()))
                QDir::root().mkpath(linkFi.absolutePath());
            if (!QFile::link(destination, absPath))
                return false;
            /* cannot change permission of links
            if (!QFile::setPermissions(absPath, fi.permissions))
                return false;
            */
        }
    }

    foreach (FileInfo fi, allFiles) {
        const QString absPath = destinationDir + QDir::separator() + fi.filePath;
        if (fi.isFile) {
            QFile f(absPath);
            if (!f.open(QIODevice::WriteOnly))
                return false;
            f.write(fileData(fi.filePath));
            f.setPermissions(fi.permissions);
            f.close();
        }
    }

    return true;
}

QZipReader::Status QZipReader::status() const
{
    return d->status;
}

void QZipReader::close()
{
    d->device->close();
}


QZipWriter::QZipWriter(const QString &fileName, QIODevice::OpenMode mode)
{
    QScopedPointer<QFile> f(new QFile(fileName));
    f->open(mode);
    QZipWriter::Status status;
    if (f->error() == QFile::NoError)
        status = QZipWriter::NoError;
    else {
        if (f->error() == QFile::WriteError)
            status = QZipWriter::FileWriteError;
        else if (f->error() == QFile::OpenError)
            status = QZipWriter::FileOpenError;
        else if (f->error() == QFile::PermissionsError)
            status = QZipWriter::FilePermissionsError;
        else
            status = QZipWriter::FileError;
    }

    d = new QZipWriterPrivate(f.data(), /*ownDevice=*/true);
    f.take();
    d->status = status;
}

QZipWriter::QZipWriter(QIODevice *device)
    : d(new QZipWriterPrivate(device, /*ownDevice=*/false))
{
    Q_ASSERT(device);
}

QZipWriter::~QZipWriter()
{
    close();
    delete d;
}

QIODevice* QZipWriter::device() const
{
    return d->device;
}

bool QZipWriter::isWritable() const
{
    return d->device->isWritable();
}

bool QZipWriter::exists() const
{
    QFile *f = qobject_cast<QFile*> (d->device);
    if (f == 0)
        return true;
    return f->exists();
}

QZipWriter::Status QZipWriter::status() const
{
    return d->status;
}

void QZipWriter::setCompressionPolicy(CompressionPolicy policy)
{
    d->compressionPolicy = policy;
}

QZipWriter::CompressionPolicy QZipWriter::compressionPolicy() const
{
    return d->compressionPolicy;
}

void QZipWriter::setCreationPermissions(QFile::Permissions permissions)
{
    d->permissions = permissions;
}

QFile::Permissions QZipWriter::creationPermissions() const
{
    return d->permissions;
}

void QZipWriter::addFile(const QString &fileName, const QByteArray &data)
{
    d->addEntry(QZipWriterPrivate::File, QDir::fromNativeSeparators(fileName), data);
}

void QZipWriter::addFile(const QString &fileName, QIODevice *device)
{
    Q_ASSERT(device);
    QIODevice::OpenMode mode = device->openMode();
    bool opened = false;
    if ((mode & QIODevice::ReadOnly) == 0) {
        opened = true;
        if (! device->open(QIODevice::ReadOnly)) {
            d->status = FileOpenError;
            return;
        }
    }
    d->addEntry(QZipWriterPrivate::File, QDir::fromNativeSeparators(fileName), device->readAll());
    if (opened)
        device->close();
}

void QZipWriter::addDirectory(const QString &dirName)
{
    QString name(QDir::fromNativeSeparators(dirName));
    // separator is mandatory
    if (!name.endsWith(QLatin1Char('/')))
        name.append(QLatin1Char('/'));
    d->addEntry(QZipWriterPrivate::Directory, name, QByteArray());
}

void QZipWriter::addSymLink(const QString &fileName, const QString &destination)
{
    d->addEntry(QZipWriterPrivate::Symlink, QDir::fromNativeSeparators(fileName), QFile::encodeName(destination));
}

void QZipWriter::close()
{
    if (!(d->device->openMode() & QIODevice::WriteOnly)) {
        d->device->close();
        return;
    }

    //qDebug("QZip::close writing directory, %d entries", d->fileHeaders.size());
    d->device->seek(d->start_of_directory);
    // write new directory
    for (int i = 0; i < d->fileHeaders.size(); ++i) {
        const FileHeader &header = d->fileHeaders.at(i);
        d->device->write((const char *)&header.h, sizeof(CentralFileHeader));
        d->device->write(header.file_name);
        d->device->write(header.extra_field);
        d->device->write(header.file_comment);
    }
    int dir_size = d->device->pos() - d->start_of_directory;
    // write end of directory
    EndOfDirectory eod;
    memset(&eod, 0, sizeof(EndOfDirectory));
    writeUInt(eod.signature, 0x06054b50);
    //uchar this_disk[2];
    //uchar start_of_directory_disk[2];
    writeUShort(eod.num_dir_entries_this_disk, d->fileHeaders.size());
    writeUShort(eod.num_dir_entries, d->fileHeaders.size());
    writeUInt(eod.directory_size, dir_size);
    writeUInt(eod.dir_start_offset, d->start_of_directory);
    writeUShort(eod.comment_length, d->comment.length());

    d->device->write((const char *)&eod, sizeof(EndOfDirectory));
    d->device->write(d->comment);
    d->device->close();
}

QT_END_NAMESPACE

#endif // QT_NO_TEXTODFWRITER