QByteArray Scanner::hashFile(QFile &f)
{
uchar *map;
QCryptographicHash hasher(QCryptographicHash::Sha1);
hasher.reset();
/* Try map first */
map = f.map( 0, f.size() );
if (NULL==map) {
/* no mmap, read in chunks */
uchar buffer[512];
qint64 r;
do {
r = f.read((char*)buffer,sizeof(buffer));
if (r<0){
throw 1;
}
if (r<=0)
break;
hasher.addData( (const char*)buffer, r);
} while (r>0);
} else {
hasher.addData((const char*)map,f.size());
f.unmap(map);
}
return hasher.result();
}
FixFile::FixFile(QIODevice* file, const QString& filename)
{
_file = file;
if (!file) {
_len = 0;
_currentLeft = 0;
_openError = true;
return;
}
_filename = filename;
if (!file->isOpen() && !file->open( QIODevice::ReadOnly ) ) {
qWarning( "%s: %s", (const char*)QFile::encodeName(_filename),
strerror( errno ) );
_len = 0;
_currentLeft = 0;
_openError = true;
return;
}
_openError = false;
_used_mmap = false;
uchar* addr = 0;
#if QT_VERSION >= 0x040400
// QFile::map was introduced with Qt 4.4
if (file->size() >0) {
QFile* mappableDevice = dynamic_cast<QFile*>(file);
if (mappableDevice) {
addr = mappableDevice->map( 0, file->size() );
}
}
#endif
if (addr) {
// map succeeded
_base = (char*) addr;
_len = file->size();
_used_mmap = true;
if (0) qDebug("Mapped '%s'", qPrintable( _filename ));
}
else {
// try reading the data into memory instead
file->seek(0);
_data = file->readAll();
_base = _data.data();
_len = _data.size();
}
_current = _base;
_currentLeft = _len;
}
uint JsonEngine::findEnd(QFile &file)
{
int len = file.size();
QByteArray data;
uchar *fmap = file.map(0, file.size());
if(!fmap)
{
data = file.readAll();
fmap = (uchar *)data.constData();
}
uint end = file.size();
const uchar *s = K8JSON::skipBlanks(fmap, &len);
uchar qch = *s;
if(!s || (qch != '[' && qch != '{'))
{
if(data.isEmpty())
file.unmap(fmap);
return end;
}
qch = (qch == '{' ? '}' : ']');
s++;
len--;
bool first = true;
while(s)
{
s = K8JSON::skipBlanks(s, &len);
if(len < 2 || (s && *s == qch))
{
if(*(s-1) == '\n')
s--;
end = (uint)(s - fmap);
break;
}
if(!s)
break;
if((!first && *s != ',') || (first && *s == ','))
break;
first = false;
if(*s == ',')
{
s++;
len--;
}
if(!(s = K8JSON::skipRec(s, &len)))
break;
}
if(data.isEmpty())
file.unmap(fmap);
return end;
}
static QFile* map(QString path, raw_buffer &fData)
{
const char *message;
QFile *f = new QFile(path);
if (!f->open(QIODevice::ReadOnly)) {
message = "is not readable";
goto map_failed;
}
if (f->size() > std::numeric_limits<typeof(fData.m_len)>::max()) {
message = "is too big";
goto map_failed;
}
if (f->size() != 0) {
fData.m_len = f->size();
fData.m_str = (const char *)f->map(0, f->size());
if (fData.m_str == NULL) {
message = "failed to memory map";
goto map_failed;
}
} else {
qDebug() << "File" << path << "is empty";
fData.m_len = 0;
fData.m_str = "";
}
return f;
map_failed:
f->close();
delete f;
f = NULL;
const char *fileNameStr = qPrintable(path);
fprintf(stderr, "%s %s\n", fileNameStr, message);
return f;
}
QByteArray QCOMM::md5(QFile &file)
{
unsigned char *buf;
bool isopen;
if(!file.exists())
return QByteArray();
if(file.size()==0)
return QByteArray();
if(file.isOpen())
isopen = TRUE;
if(isopen&&(!file.open(QIODevice::ReadOnly)))
return QByteArray();
buf = file.map(0,file.size());
if(isopen)
file.close();
if(0==buf)
return QByteArray();
QByteArray data = QByteArray::fromRawData((char*)buf,file.size());
QByteArray md5 = QCryptographicHash::hash (data, QCryptographicHash::Md5);
file.unmap(buf);
return md5;
}
