| 1 | /* This file is part of Aard Dictionary for Android <http://aarddict.org>. |
| 2 | * |
| 3 | * This program is free software: you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 3 |
| 5 | * as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License <http://www.gnu.org/licenses/gpl-3.0.txt> |
| 11 | * for more details. |
| 12 | * |
| 13 | * Copyright (C) 2010 Igor Tkach |
| 14 | */ |
| 15 | |
| 16 | package aarddict; |
| 17 | |
| 18 | import java.io.EOFException; |
| 19 | import java.io.File; |
| 20 | import java.io.FileNotFoundException; |
| 21 | import java.io.IOException; |
| 22 | import java.util.UUID; |
| 23 | |
| 24 | final class RandomAccessFile extends java.io.RandomAccessFile { |
| 25 | |
| 26 | public RandomAccessFile(File file, String mode) throws FileNotFoundException { |
| 27 | super(file, mode); |
| 28 | } |
| 29 | |
| 30 | public RandomAccessFile(String fileName, String mode) throws FileNotFoundException { |
| 31 | super(fileName, mode); |
| 32 | } |
| 33 | |
| 34 | public final long readUnsignedInt() throws IOException { |
| 35 | int ch1 = this.read(); |
| 36 | int ch2 = this.read(); |
| 37 | int ch3 = this.read(); |
| 38 | int ch4 = this.read(); |
| 39 | if ((ch1 | ch2 | ch3 | ch4) < 0) |
| 40 | throw new EOFException(); |
| 41 | return ((long) (ch1 << 24) + (ch2 << 16) + (ch3 << 8) + (ch4 << 0)) & 0xFFFFFFFFL; |
| 42 | } |
| 43 | |
| 44 | public final long readUnsignedLong() throws IOException { |
| 45 | int ch1 = this.read(); |
| 46 | int ch2 = this.read(); |
| 47 | int ch3 = this.read(); |
| 48 | int ch4 = this.read(); |
| 49 | int ch5 = this.read(); |
| 50 | int ch6 = this.read(); |
| 51 | int ch7 = this.read(); |
| 52 | int ch8 = this.read(); |
| 53 | if ((ch1 | ch2 | ch3 | ch4 | ch5 | ch6 | ch7 | ch8) < 0) |
| 54 | throw new EOFException(); |
| 55 | return ((long) (ch1 << 56) + (ch2 << 48) + (ch3 << 40) + (ch4 << 32) + (ch5 << 24) + (ch6 << 16) + (ch7 << 8) + (ch8 << 0)) & 0xFFFFFFFFFFFFFFFFL; |
| 56 | } |
| 57 | |
| 58 | public final String readUTF8(int length) throws IOException { |
| 59 | byte[] s = new byte[length]; |
| 60 | this.read(s); |
| 61 | return Volume.utf8(s); |
| 62 | } |
| 63 | |
| 64 | public final UUID readUUID() throws IOException { |
| 65 | byte[] s = new byte[16]; |
| 66 | this.read(s); |
| 67 | return Volume.uuid(s); |
| 68 | } |
| 69 | |
| 70 | public final long readSpec(char spec) throws IOException { |
| 71 | if (spec == 'L' || spec == 'I') { |
| 72 | return readUnsignedInt(); |
| 73 | } |
| 74 | if (spec == 'Q') { |
| 75 | return readUnsignedLong(); |
| 76 | } |
| 77 | if (spec == 'H') { |
| 78 | return readUnsignedShort(); |
| 79 | } |
| 80 | if (spec == 'l' || spec == 'i') { |
| 81 | return readInt(); |
| 82 | } |
| 83 | if (spec == 'q') { |
| 84 | return readLong(); |
| 85 | } |
| 86 | if (spec == 'h') { |
| 87 | return this.readShort(); |
| 88 | } |
| 89 | throw new IOException("Unsupported spec character " + spec); |
| 90 | } |
| 91 | |
| 92 | } |