C++ BDirectory::GetCreationTime方法代码示例

status_t ExtractQueryVolumes(BNode *node, vollist *volumes) {
	int32 length = 0;
	char *attr = ReadAttribute(*node, kTrackerQueryVolume, &length);
	BVolumeRoster roster;

	if (attr == NULL) {
		roster.Rewind();
		BVolume vol;
		
		while (roster.GetNextVolume(&vol) == B_NO_ERROR) {
			if ((vol.IsPersistent() == true) && (vol.KnowsQuery() == true)) {
				volumes->push_back(vol);
			};
		};
	} else {
		BMessage msg;
		msg.Unflatten(attr);

//		!*YOINK*!d from that project... with the funny little doggie as a logo...
//		OpenTracker, that's it!
			
		time_t created;
		off_t capacity;
		
		for (int32 index = 0; msg.FindInt32("creationDate", index, &created) == B_OK;
			index++) {
			
			if ((msg.FindInt32("creationDate", index, &created) != B_OK)
				|| (msg.FindInt64("capacity", index, &capacity) != B_OK))
				return B_ERROR;
		
			BVolume volume;
			BString deviceName = "";
			BString volumeName = "";
			BString fshName = "";
		
			if (msg.FindString("deviceName", &deviceName) == B_OK
				&& msg.FindString("volumeName", &volumeName) == B_OK
				&& msg.FindString("fshName", &fshName) == B_OK) {
				// New style volume identifiers: We have a couple of characteristics,
				// and compute a score from them. The volume with the greatest score
				// (if over a certain threshold) is the one we're looking for. We
				// pick the first volume, in case there is more than one with the
				// same score.
				int foundScore = -1;
				roster.Rewind();
				
				char name[B_FILE_NAME_LENGTH];
				
				while (roster.GetNextVolume(&volume) == B_OK) {
					if (volume.IsPersistent() && volume.KnowsQuery()) {
						// get creation time and fs_info
						BDirectory root;
						volume.GetRootDirectory(&root);
						time_t cmpCreated;
						fs_info info;
						if (root.GetCreationTime(&cmpCreated) == B_OK
							&& fs_stat_dev(volume.Device(), &info) == 0) {
							// compute the score
							int score = 0;
		
							// creation time
							if (created == cmpCreated)
								score += 5;
							// capacity
							if (capacity == volume.Capacity())
								score += 4;
							// device name
							if (deviceName == info.device_name)
								score += 3;
							// volume name
							if (volumeName == info.volume_name)
								score += 2;
							// fsh name
							if (fshName == info.fsh_name)
								score += 1;
		
							// check score
							if (score >= 9 && score > foundScore) {
								volume.GetName(name);
								volumes->push_back(volume);
							}
						}
					}
				}
			} else {
				// Old style volume identifiers: We have only creation time and
				// capacity. Both must match.
				roster.Rewind();
				while (roster.GetNextVolume(&volume) == B_OK)
					if (volume.IsPersistent() && volume.KnowsQuery()) {
						BDirectory root;
						volume.GetRootDirectory(&root);
						time_t cmpCreated;
						root.GetCreationTime(&cmpCreated);
						if (created == cmpCreated && capacity == volume.Capacity()) {
							volumes->push_back(volume);
						}
					}
			}
//.........这里部分代码省略.........