bool QFSFileEngine::setSize(qint64 size)
{
Q_D(QFSFileEngine);
bool ret = false;
TInt err = KErrNone;
if (d->symbianFile.SubSessionHandle()) {
TInt err = d->symbianFile.SetSize(size);
ret = (err == KErrNone);
if (ret && d->symbianFilePos > size)
d->symbianFilePos = size;
}
else if (d->fd != -1)
ret = QT_FTRUNCATE(d->fd, size) == 0;
else if (d->fh)
ret = QT_FTRUNCATE(QT_FILENO(d->fh), size) == 0;
else {
RFile tmp;
QString symbianFilename(d->fileEntry.nativeFilePath());
err = tmp.Open(qt_s60GetRFs(), qt_QString2TPtrC(symbianFilename), EFileWrite);
if (err == KErrNone)
{
err = tmp.SetSize(size);
tmp.Close();
}
ret = (err == KErrNone);
}
if (!ret) {
QSystemError error;
if (err)
error = QSystemError(err, QSystemError::NativeError);
else
error = QSystemError(errno, QSystemError::StandardLibraryError);
setError(QFile::ResizeError, error.toString());
}
return ret;
}
/*!
\internal
*/
qint64 QFSFileEnginePrivate::nativeRead(char *data, qint64 len)
{
Q_Q(QFSFileEngine);
#ifdef Q_OS_SYMBIAN
if (symbianFile.SubSessionHandle()) {
if(len > KMaxTInt) {
//this check is more likely to catch a corrupt length, since it isn't possible to allocate 2GB buffers (yet..)
q->setError(QFile::ReadError, QLatin1String("Maximum 2GB in single read on this platform"));
return -1;
}
TPtr8 ptr(reinterpret_cast<TUint8*>(data), static_cast<TInt>(len));
TInt r = symbianFile.Read(symbianFilePos, ptr);
if (r != KErrNone)
{
q->setError(QFile::ReadError, QSystemError(r, QSystemError::NativeError).toString());
return -1;
}
symbianFilePos += ptr.Length();
return qint64(ptr.Length());
}
#endif
if (fh && nativeIsSequential()) {
size_t readBytes = 0;
int oldFlags = fcntl(QT_FILENO(fh), F_GETFL);
for (int i = 0; i < 2; ++i) {
// Unix: Make the underlying file descriptor non-blocking
if ((oldFlags & O_NONBLOCK) == 0)
fcntl(QT_FILENO(fh), F_SETFL, oldFlags | O_NONBLOCK);
// Cross platform stdlib read
size_t read = 0;
do {
read = fread(data + readBytes, 1, size_t(len - readBytes), fh);
} while (read == 0 && !feof(fh) && errno == EINTR);
if (read > 0) {
readBytes += read;
break;
} else {
if (readBytes)
break;
readBytes = read;
}
// Unix: Restore the blocking state of the underlying socket
if ((oldFlags & O_NONBLOCK) == 0) {
fcntl(QT_FILENO(fh), F_SETFL, oldFlags);
if (readBytes == 0) {
int readByte = 0;
do {
readByte = fgetc(fh);
} while (readByte == -1 && errno == EINTR);
if (readByte != -1) {
*data = uchar(readByte);
readBytes += 1;
} else {
break;
}
}
}
}
// Unix: Restore the blocking state of the underlying socket
if ((oldFlags & O_NONBLOCK) == 0) {
fcntl(QT_FILENO(fh), F_SETFL, oldFlags);
}
if (readBytes == 0 && !feof(fh)) {
// if we didn't read anything and we're not at EOF, it must be an error
q->setError(QFile::ReadError, qt_error_string(int(errno)));
return -1;
}
return readBytes;
}
return readFdFh(data, len);
}
/*!
\internal
*/
bool QFSFileEnginePrivate::nativeOpen(QIODevice::OpenMode openMode)
{
Q_Q(QFSFileEngine);
if (openMode & QIODevice::Unbuffered) {
int flags = openModeToOpenFlags(openMode);
// Try to open the file in unbuffered mode.
do {
fd = QT_OPEN(fileEntry.nativeFilePath().constData(), flags, 0666);
} while (fd == -1 && errno == EINTR);
// On failure, return and report the error.
if (fd == -1) {
q->setError(errno == EMFILE ? QFile::ResourceError : QFile::OpenError,
qt_error_string(errno));
return false;
}
if (!(openMode & QIODevice::WriteOnly)) {
// we don't need this check if we tried to open for writing because then
// we had received EISDIR anyway.
if (QFileSystemEngine::fillMetaData(fd, metaData)
&& metaData.isDirectory()) {
q->setError(QFile::OpenError, QLatin1String("file to open is a directory"));
QT_CLOSE(fd);
return false;
}
}
// Seek to the end when in Append mode.
if (flags & QFile::Append) {
int ret;
do {
ret = QT_LSEEK(fd, 0, SEEK_END);
} while (ret == -1 && errno == EINTR);
if (ret == -1) {
q->setError(errno == EMFILE ? QFile::ResourceError : QFile::OpenError,
qt_error_string(int(errno)));
return false;
}
}
fh = 0;
} else {
QByteArray fopenMode = openModeToFopenMode(openMode, fileEntry, metaData);
// Try to open the file in buffered mode.
do {
fh = QT_FOPEN(fileEntry.nativeFilePath().constData(), fopenMode.constData());
} while (!fh && errno == EINTR);
// On failure, return and report the error.
if (!fh) {
q->setError(errno == EMFILE ? QFile::ResourceError : QFile::OpenError,
qt_error_string(int(errno)));
return false;
}
if (!(openMode & QIODevice::WriteOnly)) {
// we don't need this check if we tried to open for writing because then
// we had received EISDIR anyway.
if (QFileSystemEngine::fillMetaData(QT_FILENO(fh), metaData)
&& metaData.isDirectory()) {
q->setError(QFile::OpenError, QLatin1String("file to open is a directory"));
fclose(fh);
return false;
}
}
setCloseOnExec(fileno(fh)); // ignore failure
// Seek to the end when in Append mode.
if (openMode & QIODevice::Append) {
int ret;
do {
ret = QT_FSEEK(fh, 0, SEEK_END);
} while (ret == -1 && errno == EINTR);
if (ret == -1) {
q->setError(errno == EMFILE ? QFile::ResourceError : QFile::OpenError,
qt_error_string(int(errno)));
return false;
}
}
fd = -1;
}
closeFileHandle = true;
return true;
}
uchar *QFSFileEnginePrivate::map(qint64 offset, qint64 size,
QFile::MemoryMapFlags flags)
{
#ifndef Q_OS_WINPHONE
Q_Q(QFSFileEngine);
Q_UNUSED(flags);
if (openMode == QFile::NotOpen) {
q->setError(QFile::PermissionsError, qt_error_string(ERROR_ACCESS_DENIED));
return 0;
}
if (offset == 0 && size == 0) {
q->setError(QFile::UnspecifiedError, qt_error_string(ERROR_INVALID_PARAMETER));
return 0;
}
// check/setup args to map
DWORD access = 0;
if (flags & QFileDevice::MapPrivateOption) {
#ifdef FILE_MAP_COPY
access = FILE_MAP_COPY;
#else
q->setError(QFile::UnspecifiedError, "MapPrivateOption unsupported");
return 0;
#endif
} else if (openMode & QIODevice::WriteOnly) {
access = FILE_MAP_WRITE;
} else if (openMode & QIODevice::ReadOnly) {
access = FILE_MAP_READ;
}
if (mapHandle == NULL) {
// get handle to the file
HANDLE handle = fileHandle;
#ifndef Q_OS_WINCE
if (handle == INVALID_HANDLE_VALUE && fh)
handle = (HANDLE)::_get_osfhandle(QT_FILENO(fh));
#endif
#ifdef Q_USE_DEPRECATED_MAP_API
nativeClose();
// handle automatically closed by kernel with mapHandle (below).
handle = ::CreateFileForMapping((const wchar_t*)fileEntry.nativeFilePath().utf16(),
GENERIC_READ | (openMode & QIODevice::WriteOnly ? GENERIC_WRITE : 0),
0,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
// Since this is a special case, we check if the return value was NULL and if so
// we change it to INVALID_HANDLE_VALUE to follow the logic inside this function.
if(0 == handle)
handle = INVALID_HANDLE_VALUE;
#endif
if (handle == INVALID_HANDLE_VALUE) {
q->setError(QFile::PermissionsError, qt_error_string(ERROR_ACCESS_DENIED));
return 0;
}
// first create the file mapping handle
DWORD protection = (openMode & QIODevice::WriteOnly) ? PAGE_READWRITE : PAGE_READONLY;
#ifndef Q_OS_WINRT
mapHandle = ::CreateFileMapping(handle, 0, protection, 0, 0, 0);
#else
mapHandle = ::CreateFileMappingFromApp(handle, 0, protection, 0, 0);
#endif
if (mapHandle == NULL) {
q->setError(QFile::PermissionsError, qt_error_string());
#ifdef Q_USE_DEPRECATED_MAP_API
::CloseHandle(handle);
#endif
return 0;
}
}
DWORD offsetHi = offset >> 32;
DWORD offsetLo = offset & Q_UINT64_C(0xffffffff);
SYSTEM_INFO sysinfo;
#ifndef Q_OS_WINRT
::GetSystemInfo(&sysinfo);
#else
::GetNativeSystemInfo(&sysinfo);
#endif
DWORD mask = sysinfo.dwAllocationGranularity - 1;
DWORD extra = offset & mask;
if (extra)
offsetLo &= ~mask;
// attempt to create the map
#ifndef Q_OS_WINRT
LPVOID mapAddress = ::MapViewOfFile(mapHandle, access,
offsetHi, offsetLo, size + extra);
#else
LPVOID mapAddress = ::MapViewOfFileFromApp(mapHandle, access,
(ULONG64(offsetHi) << 32) + offsetLo, size + extra);
#endif
if (mapAddress) {
uchar *address = extra + static_cast<uchar*>(mapAddress);
maps[address] = extra;
return address;
}
switch(GetLastError()) {
case ERROR_ACCESS_DENIED:
q->setError(QFile::PermissionsError, qt_error_string());
break;
case ERROR_INVALID_PARAMETER:
// size are out of bounds
default:
q->setError(QFile::UnspecifiedError, qt_error_string());
}
::CloseHandle(mapHandle);
mapHandle = NULL;
#else // !Q_OS_WINPHONE
Q_UNUSED(offset);
Q_UNUSED(size);
Q_UNUSED(flags);
Q_UNIMPLEMENTED();
#endif // Q_OS_WINPHONE
return 0;
}