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#include <QFile>
#include "quagzipfile.h"
class QuaGzipFilePrivate {
friend class QuaGzipFile;
QString fileName;
gzFile gzd;
inline QuaGzipFilePrivate(): gzd(NULL) {}
inline QuaGzipFilePrivate(const QString &fileName):
fileName(fileName), gzd(NULL) {}
template<typename FileId> bool open(FileId id,
QIODevice::OpenMode mode, QString &error);
gzFile open(int fd, const char *modeString);
gzFile open(const QString &name, const char *modeString);
};
gzFile QuaGzipFilePrivate::open(const QString &name, const char *modeString)
{
return gzopen(QFile::encodeName(name).constData(), modeString);
}
gzFile QuaGzipFilePrivate::open(int fd, const char *modeString)
{
return gzdopen(fd, modeString);
}
template<typename FileId>
bool QuaGzipFilePrivate::open(FileId id, QIODevice::OpenMode mode,
QString &error)
{
char modeString[2];
modeString[0] = modeString[1] = '\0';
if ((mode & QIODevice::ReadOnly) != 0
&& (mode & QIODevice::WriteOnly) != 0) {
error = QuaGzipFile::trUtf8("Opening gzip for both reading"
" and writing is not supported");
return false;
} else if ((mode & QIODevice::ReadOnly) != 0) {
modeString[0] = 'r';
} else if ((mode & QIODevice::WriteOnly) != 0) {
modeString[0] = 'w';
} else {
error = QuaGzipFile::trUtf8("You can open a gzip either for reading"
" or for writing. Which is it?");
return false;
}
gzd = open(id, modeString);
if (gzd == NULL) {
error = QuaGzipFile::trUtf8("Could not gzopen() file");
return false;
}
return true;
}
QuaGzipFile::QuaGzipFile():
d(new QuaGzipFilePrivate())
{
}
QuaGzipFile::QuaGzipFile(QObject *parent):
QIODevice(parent),
d(new QuaGzipFilePrivate())
{
}
QuaGzipFile::QuaGzipFile(const QString &fileName, QObject *parent):
QIODevice(parent),
d(new QuaGzipFilePrivate(fileName))
{
}
QuaGzipFile::~QuaGzipFile()
{
if (isOpen()) {
close();
}
delete d;
}
void QuaGzipFile::setFileName(const QString& fileName)
{
d->fileName = fileName;
}
QString QuaGzipFile::getFileName() const
{
return d->fileName;
}
bool QuaGzipFile::isSequential() const
{
return true;
}
bool QuaGzipFile::open(QIODevice::OpenMode mode)
{
QString error;
if (!d->open(d->fileName, mode, error)) {
setErrorString(error);
return false;
}
return QIODevice::open(mode);
}
bool QuaGzipFile::open(int fd, QIODevice::OpenMode mode)
{
QString error;
if (!d->open(fd, mode, error)) {
setErrorString(error);
return false;
}
return QIODevice::open(mode);
}
bool QuaGzipFile::flush()
{
return gzflush(d->gzd, Z_SYNC_FLUSH) == Z_OK;
}
void QuaGzipFile::close()
{
QIODevice::close();
gzclose(d->gzd);
}
qint64 QuaGzipFile::readData(char *data, qint64 maxSize)
{
return gzread(d->gzd, (voidp)data, (unsigned)maxSize);
}
qint64 QuaGzipFile::writeData(const char *data, qint64 maxSize)
{
if (maxSize == 0)
return 0;
int written = gzwrite(d->gzd, (voidp)data, (unsigned)maxSize);
if (written == 0)
return -1;
else
return written;
}
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