/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package libcore.io;

import android.system.ErrnoException;
import android.system.Os;

import com.android.ravenwood.common.JvmWorkaround;

import java.io.File;
import java.io.FileDescriptor;
import java.io.IOException;
import java.net.Socket;

/** @hide */
public final class IoUtils {
    private IoUtils() {
    }

    public static void closeQuietly(AutoCloseable closeable) {
        if (closeable != null) {
            try {
                closeable.close();
            } catch (RuntimeException rethrown) {
                throw rethrown;
            } catch (Exception ignored) {
            }
        }
    }

    public static void closeQuietly(Socket socket) {
        if (socket != null) {
            try {
                socket.close();
            } catch (RuntimeException rethrown) {
                throw rethrown;
            } catch (Exception ignored) {
            }
        }
    }

    public static void closeQuietly(FileDescriptor fd) {
        try {
            Os.close(fd);
        } catch (ErrnoException ignored) {
        }
    }

    public static void deleteContents(File dir) throws IOException {
        File[] files = dir.listFiles();
        if (files != null) {
            for (File file : files) {
                if (file.isDirectory()) {
                    deleteContents(file);
                }
                file.delete();
            }
        }
    }

    /**
     * FD owners currently unsupported under Ravenwood; ignored
     */
    public static void setFdOwner(FileDescriptor fd, Object owner) {
    }

    /**
     * FD owners currently unsupported under Ravenwood; return FD directly
     */
    public static int acquireRawFd(FileDescriptor fd) {
        return JvmWorkaround.getInstance().getFdInt(fd);
    }
}