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/*
* Copyright (C) 2017 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 com.android.launcher3.util;
import android.content.Context;
import android.util.Log;
import com.android.launcher3.Utilities;
import com.android.launcher3.config.FeatureFlags;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
/**
* Supports various IO utility functions
*/
public class IOUtils {
private static final int BUF_SIZE = 0x1000; // 4K
private static final String TAG = "IOUtils";
public static byte[] toByteArray(File file) throws IOException {
try (InputStream in = new FileInputStream(file)) {
return toByteArray(in);
}
}
public static byte[] toByteArray(InputStream in) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
copy(in, out);
return out.toByteArray();
}
public static long copy(InputStream from, OutputStream to) throws IOException {
byte[] buf = new byte[BUF_SIZE];
long total = 0;
int r;
while ((r = from.read(buf)) != -1) {
to.write(buf, 0, r);
total += r;
}
return total;
}
/**
* Utility method to debug binary data
*/
public static String createTempFile(Context context, byte[] data) {
if (!FeatureFlags.IS_DOGFOOD_BUILD) {
throw new IllegalStateException("Method only allowed in development mode");
}
String name = UUID.randomUUID().toString();
File file = new File(context.getCacheDir(), name);
try (FileOutputStream fo = new FileOutputStream(file)) {
fo.write(data);
fo.flush();
} catch (Exception e) {
throw new RuntimeException(e);
}
return file.getAbsolutePath();
}
public static void closeSilently(Closeable c) {
if (c != null) {
try {
c.close();
} catch (IOException e) {
if (FeatureFlags.IS_DOGFOOD_BUILD) {
Log.d(TAG, "Error closing", e);
}
}
}
}
}
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