| /* |
| * Copyright (C) 2015 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.apkzlib.zip.utils; |
| |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import javax.annotation.Nonnull; |
| |
| /** |
| * Utility class with utility methods for random access files. |
| */ |
| public final class RandomAccessFileUtils { |
| |
| private RandomAccessFileUtils() {} |
| |
| /** |
| * Reads from an random access file until the provided array is filled. Data is read from the |
| * current position in the file. |
| * |
| * @param raf the file to read data from |
| * @param data the array that will receive the data |
| * @throws IOException failed to read the data |
| */ |
| public static void fullyRead(@Nonnull RandomAccessFile raf, @Nonnull byte[] data) |
| throws IOException { |
| int r; |
| int p = 0; |
| |
| while ((r = raf.read(data, p, data.length - p)) > 0) { |
| p += r; |
| if (p == data.length) { |
| break; |
| } |
| } |
| |
| if (p < data.length) { |
| throw new IOException( |
| "Failed to read " |
| + data.length |
| + " bytes from file. Only " |
| + p |
| + " bytes could be read."); |
| } |
| } |
| } |