/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.util;
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import android.content.Context;
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import com.android.launcher3.config.FeatureFlags;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.UUID;
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/**
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* Supports various IO utility functions
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*/
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public class IOUtils {
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private static final int BUF_SIZE = 0x1000; // 4K
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public static byte[] toByteArray(File file) throws IOException {
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try (InputStream in = new FileInputStream(file)) {
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return toByteArray(in);
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}
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}
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public static byte[] toByteArray(InputStream in) throws IOException {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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copy(in, out);
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return out.toByteArray();
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}
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public static long copy(InputStream from, OutputStream to) throws IOException {
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byte[] buf = new byte[BUF_SIZE];
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long total = 0;
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int r;
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while ((r = from.read(buf)) != -1) {
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to.write(buf, 0, r);
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total += r;
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}
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return total;
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}
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/**
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* Utility method to debug binary data
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*/
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public static String createTempFile(Context context, byte[] data) {
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if (!FeatureFlags.IS_DOGFOOD_BUILD) {
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throw new IllegalStateException("Method only allowed in development mode");
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}
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String name = UUID.randomUUID().toString();
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File file = new File(context.getCacheDir(), name);
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try (FileOutputStream fo = new FileOutputStream(file)) {
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fo.write(data);
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fo.flush();
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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return file.getAbsolutePath();
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}
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}
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