QZipReaderPrivate Class Reference

Inheritance diagram for QZipReaderPrivate:

Public Functions
	QZipReaderPrivate (QIODevice *device, bool ownDev)
void	scanFiles ()
Public Functions inherited from QZipPrivate
void	fillFileInfo (int index, QZipReader::FileInfo &fileInfo) const
	QZipPrivate (QIODevice *device, bool ownDev)
	~QZipPrivate ()

Public Variables
QZipReader::Status	status
Public Variables inherited from QZipPrivate
QByteArray	comment
QIODevice *	device
bool	dirtyFileTree
QList< FileHeader >	fileHeaders
bool	ownDevice
uint	start_of_directory

Detailed Description

Definition at line 430 of file qzip.cpp.

Constructors and Destructors

QZipReaderPrivate()

QZipReaderPrivate::QZipReaderPrivate ( QIODevice *  device, bool  ownDev  )

inline

Definition at line 433 of file qzip.cpp.

        : QZipPrivate(device, ownDev), status(QZipReader::NoError)
    {
    }

Functions

scanFiles()

void QZipReaderPrivate::scanFiles

(

)

Definition at line 479 of file qzip.cpp.

Referenced by QZipReader::count(), QZipReader::entryInfoAt(), QZipReader::fileData(), and QZipReader::fileInfoList().

{
    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);
    }
}

Properties

status

QZipReader::Status QZipReaderPrivate::status

Definition at line 440 of file qzip.cpp.

Referenced by QZipWriter::QZipWriter(), and QZipReader::status().

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The documentation for this class was generated from the following file:

• /src/gui/text/qzip.cpp