C++ FSNode::exists方法代码示例

bool Ps2SaveFileManager::removeSavefile(const Common::String &filename) {
	Common::FSNode savePath(ConfMan.get("savepath")); // TODO: is this fast?
	Common::FSNode file;

	if (!savePath.exists() || !savePath.isDirectory())
		return false;

	if (_getDev(savePath) == MC_DEV) {
	// if (strncmp(savePath.getPath().c_str(), "mc0:", 4) == 0) {
		char path[32], temp[32];
		strcpy(temp, filename.c_str());

		// mcSplit(temp, game, ext);
		char *game = strdup(strtok(temp, "."));
		char *ext = strdup(strtok(NULL, "*"));
		sprintf(path, "mc0:ScummVM/%s", game); // per game path
		mcCheck(path);
		sprintf(path, "mc0:ScummVM/%s/%s.sav", game, ext);
		file = Common::FSNode(path);
		free(game);
		free(ext);
	} else {
		file = savePath.getChild(filename);
	}

	if (!file.exists() || file.isDirectory())
		return false;

	fio.remove(file.getPath().c_str());

	return true;
}

bool ThemeEngine::themeConfigUsable(const Common::FSNode &node, Common::String &themeName) {
	Common::File stream;
	bool foundHeader = false;

	if (node.getName().matchString("*.zip", true) && !node.isDirectory()) {
		Common::Archive *zipArchive = Common::makeZipArchive(node);
		if (zipArchive && zipArchive->hasFile("THEMERC")) {
			// Open THEMERC from the ZIP file.
			stream.open("THEMERC", *zipArchive);
		}
		// Delete the ZIP archive again. Note: This only works because
		// stream.open() only uses ZipArchive::createReadStreamForMember,
		// and that in turn happens to read all the data for a given
		// archive member into a memory block. So there will be no dangling
		// reference to zipArchive anywhere. This could change if we
		// ever modify ZipArchive::createReadStreamForMember.
		delete zipArchive;
	} else if (node.isDirectory()) {
		Common::FSNode headerfile = node.getChild("THEMERC");
		if (!headerfile.exists() || !headerfile.isReadable() || headerfile.isDirectory())
			return false;
		stream.open(headerfile);
	}

	if (stream.isOpen()) {
		Common::String stxHeader = stream.readLine();
		foundHeader = themeConfigParseHeader(stxHeader, themeName);
	}

	return foundHeader;
}

void DefaultSaveFileManager::checkPath(const Common::FSNode &dir) {
	clearError();
	if (!dir.exists()) {
		setError(Common::kPathDoesNotExist, "The savepath '"+dir.getPath()+"' does not exist");
	} else if (!dir.isDirectory()) {
		setError(Common::kPathNotDirectory, "The savepath '"+dir.getPath()+"' is not a directory");
	}
}

bool BaseFileManager::initPaths() {
	// Removed: Config-based file-path choice.

	// package files paths
	const Common::FSNode gameData(ConfMan.get("path"));
	addPath(PATH_PACKAGE, gameData);

	Common::FSNode dataSubFolder = gameData.getChild("data");
	if (dataSubFolder.exists()) {
		addPath(PATH_PACKAGE, dataSubFolder);
	}
	Common::FSNode languageSubFolder = gameData.getChild("language");
	if (languageSubFolder.exists()) {
		addPath(PATH_PACKAGE, languageSubFolder);
	}
	return STATUS_OK;
}

void ThemeEngine::listUsableThemes(const Common::FSNode &node, Common::List<ThemeDescriptor> &list, int depth) {
	if (!node.exists() || !node.isReadable() || !node.isDirectory())
		return;

	ThemeDescriptor td;

	// Check whether we point to a valid theme directory.
	if (themeConfigUsable(node, td.name)) {
		td.filename = node.getPath();
		td.id = node.getName();

		list.push_back(td);

		// A theme directory should never contain any other themes
		// thus we just return to the caller here.
		return;
	}

	Common::FSList fileList;
	// Check all files. We need this to find all themes inside ZIP archives.
	if (!node.getChildren(fileList, Common::FSNode::kListFilesOnly))
		return;

	for (Common::FSList::iterator i = fileList.begin(); i != fileList.end(); ++i) {
		// We will only process zip files for now
		if (!i->getPath().matchString("*.zip", true))
			continue;

		td.name.clear();
		if (themeConfigUsable(*i, td.name)) {
			td.filename = i->getPath();
			td.id = i->getName();

			// If the name of the node object also contains
			// the ".zip" suffix, we will strip it.
			if (td.id.matchString("*.zip", true)) {
				for (int j = 0; j < 4; ++j)
					td.id.deleteLastChar();
			}

			list.push_back(td);
		}
	}

	fileList.clear();

	// Check if we exceeded the given recursion depth
	if (depth - 1 == -1)
		return;

	// As next step we will search all subdirectories
	if (!node.getChildren(fileList, Common::FSNode::kListDirectoriesOnly))
		return;

	for (Common::FSList::iterator i = fileList.begin(); i != fileList.end(); ++i)
		listUsableThemes(*i, list, depth == -1 ? - 1 : depth - 1);
}

bool FileSystemUtil::fileExists(const Common::String &filename) {
	Common::File f;
	if (f.exists(filename))
		return true;

	// Check if the file exists in the save folder
	Common::FSNode folder(PersistenceService::getSavegameDirectory());
	Common::FSNode fileNode = folder.getChild(getPathFilename(filename));
	return fileNode.exists();
}

Common::String PersistenceService::getSavegameDirectory() {
	Common::FSNode node(FileSystemUtil::getUserdataDirectory());
	Common::FSNode childNode = node.getChild(SAVEGAME_DIRECTORY);

	// Try and return the path using the savegame subfolder. But if doesn't exist, fall back on the data directory
	if (childNode.exists())
		return childNode.getPath();

	return node.getPath();
}

bool diskFileExists(const Common::String &filename) {
	// Try directly from SearchMan first
	Common::ArchiveMemberList files;
	SearchMan.listMatchingMembers(files, filename);

	for (Common::ArchiveMemberList::iterator it = files.begin(); it != files.end(); ++it) {
		if ((*it)->getName() == filename) {
			return true;
		}
	}
	// File wasn't found in SearchMan, try to parse the path as a relative path.
	Common::FSNode searchNode = getNodeForRelativePath(filename);
	if (searchNode.exists() && !searchNode.isDirectory() && searchNode.isReadable()) {
		return true;
	}
	return false;
}

bool BaseFileManager::addPath(TPathType type, const Common::FSNode &path) {
	if (!path.exists()) {
		return STATUS_FAILED;
	}

	switch (type) {
	case PATH_SINGLE:
		//  _singlePaths.push_back(path);
		error("TODO: Allow adding single-paths");
		break;
	case PATH_PACKAGE:
		_packagePaths.push_back(path);
		break;
	}

	return STATUS_OK;
}

Common::InSaveFile *DefaultSaveFileManager::openForLoading(const Common::String &filename) {
	// Ensure that the savepath is valid. If not, generate an appropriate error.
	Common::String savePathName = getSavePath();
	checkPath(Common::FSNode(savePathName));
	if (getError().getCode() != Common::kNoError)
		return 0;

	// recreate FSNode since checkPath may have changed/created the directory
	Common::FSNode savePath(savePathName);

	Common::FSNode file = savePath.getChild(filename);
	if (!file.exists())
		return 0;

	// Open the file for reading
	Common::SeekableReadStream *sf = file.createReadStream();

	return Common::wrapCompressedReadStream(sf);
}

Common::SeekableReadStream *openDiskFile(const Common::String &filename) {
	uint32 prefixSize = 0;
	Common::SeekableReadStream *file = NULL;
	Common::String fixedFilename = filename;

	// Absolute path: TODO: Add specific fallbacks here.
	if (filename.contains(':')) {
		if (filename.hasPrefix("c:\\windows\\fonts\\")) { // East Side Story refers to "c:\windows\fonts\framd.ttf"
			fixedFilename = filename.c_str() + 17;
		} else {
			error("openDiskFile::Absolute path or invalid filename used in %s", filename.c_str());
		}
	}
	// Try directly from SearchMan first
	Common::ArchiveMemberList files;
	SearchMan.listMatchingMembers(files, fixedFilename);

	for (Common::ArchiveMemberList::iterator it = files.begin(); it != files.end(); ++it) {
		if ((*it)->getName() == filename) {
			file = (*it)->createReadStream();
			break;
		}
	}
	// File wasn't found in SearchMan, try to parse the path as a relative path.
	if (!file) {
		Common::FSNode searchNode = getNodeForRelativePath(filename);
		if (searchNode.exists() && !searchNode.isDirectory() && searchNode.isReadable()) {
			file = searchNode.createReadStream();
		}
	}
	if (file) {
		uint32 magic1, magic2;
		magic1 = file->readUint32LE();
		magic2 = file->readUint32LE();

		bool compressed = false;
		if (magic1 == DCGF_MAGIC && magic2 == COMPRESSED_FILE_MAGIC) {
			compressed = true;
		}

		if (compressed) {
			uint32 dataOffset, compSize, uncompSize;
			dataOffset = file->readUint32LE();
			compSize = file->readUint32LE();
			uncompSize = file->readUint32LE();

			byte *compBuffer = new byte[compSize];
			if (!compBuffer) {
				error("Error allocating memory for compressed file '%s'", filename.c_str());
				delete file;
				return NULL;
			}

			byte *data = new byte[uncompSize];
			if (!data) {
				error("Error allocating buffer for file '%s'", filename.c_str());
				delete[] compBuffer;
				delete file;
				return NULL;
			}
			file->seek(dataOffset + prefixSize, SEEK_SET);
			file->read(compBuffer, compSize);

			if (Common::uncompress(data, (unsigned long *)&uncompSize, compBuffer, compSize) != true) {
				error("Error uncompressing file '%s'", filename.c_str());
				delete[] compBuffer;
				delete file;
				return NULL;
			}

			delete[] compBuffer;
			delete file;
			return new Common::MemoryReadStream(data, uncompSize, DisposeAfterUse::YES);
		} else {
			file->seek(0, SEEK_SET);
			return file;
		}

		return file;

	}
	return NULL;
}