bool
nsFileInputStream::Deserialize(const InputStreamParams& aParams)
{
NS_ASSERTION(!mFD, "Already have a file descriptor?!");
NS_ASSERTION(!mDeferredOpen, "Deferring open?!");
NS_ASSERTION(!mFile, "Should never have a file here!");
NS_ASSERTION(!mPerm, "This should always be 0!");
if (aParams.type() != InputStreamParams::TFileInputStreamParams) {
NS_WARNING("Received unknown parameters from the other process!");
return false;
}
const FileInputStreamParams& params = aParams.get_FileInputStreamParams();
const FileDescriptor& fd = params.file();
NS_WARN_IF_FALSE(fd.IsValid(), "Received an invalid file descriptor!");
if (fd.IsValid()) {
PRFileDesc* fileDesc = PR_ImportFile(PROsfd(fd.PlatformHandle()));
if (!fileDesc) {
NS_WARNING("Failed to import file handle!");
return false;
}
mFD = fileDesc;
}
mBehaviorFlags = params.behaviorFlags();
mIOFlags = params.ioFlags();
return true;
}
bool
nsFileInputStream::Deserialize(const InputStreamParams& aParams,
const FileDescriptorArray& aFileDescriptors)
{
NS_ASSERTION(!mFD, "Already have a file descriptor?!");
NS_ASSERTION(!mDeferredOpen, "Deferring open?!");
NS_ASSERTION(!mFile, "Should never have a file here!");
NS_ASSERTION(!mPerm, "This should always be 0!");
if (aParams.type() != InputStreamParams::TFileInputStreamParams) {
NS_WARNING("Received unknown parameters from the other process!");
return false;
}
const FileInputStreamParams& params = aParams.get_FileInputStreamParams();
uint32_t fileDescriptorIndex = params.fileDescriptorIndex();
FileDescriptor fd;
if (fileDescriptorIndex < aFileDescriptors.Length()) {
fd = aFileDescriptors[fileDescriptorIndex];
NS_WARNING_ASSERTION(fd.IsValid(),
"Received an invalid file descriptor!");
} else {
NS_WARNING("Received a bad file descriptor index!");
}
if (fd.IsValid()) {
auto rawFD = fd.ClonePlatformHandle();
PRFileDesc* fileDesc = PR_ImportFile(PROsfd(rawFD.release()));
if (!fileDesc) {
NS_WARNING("Failed to import file handle!");
return false;
}
mFD = fileDesc;
}
mBehaviorFlags = params.behaviorFlags();
if (!XRE_IsParentProcess()) {
// A child process shouldn't close when it reads the end because it will
// not be able to reopen the file later.
mBehaviorFlags &= ~nsIFileInputStream::CLOSE_ON_EOF;
// A child process will not be able to reopen the file so this flag is
// meaningless.
mBehaviorFlags &= ~nsIFileInputStream::REOPEN_ON_REWIND;
}
mIOFlags = params.ioFlags();
return true;
}
void
nsPartialFileInputStream::Serialize(InputStreamParams& aParams,
FileDescriptorArray& aFileDescriptors)
{
// Serialize the base class first.
InputStreamParams fileParams;
nsFileInputStream::Serialize(fileParams, aFileDescriptors);
PartialFileInputStreamParams params;
params.fileStreamParams() = fileParams.get_FileInputStreamParams();
params.begin() = mStart;
params.length() = mLength;
aParams = params;
}
void
nsPartialFileInputStream::Serialize(InputStreamParams& aParams)
{
// Serialize the base class first.
InputStreamParams fileParams;
nsFileInputStream::Serialize(fileParams);
if (fileParams.type() != InputStreamParams::TFileInputStreamParams) {
NS_ERROR("Base class serialize failed!");
return;
}
PartialFileInputStreamParams params;
params.fileStreamParams() = fileParams.get_FileInputStreamParams();
params.begin() = mStart;
params.length() = mLength;
aParams = params;
}
