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1 /*
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2 * Copyright 2000-2004 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.debugger.win32;
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26
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27 import java.io.*;
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28 import sun.jvm.hotspot.debugger.*;
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29 import sun.jvm.hotspot.debugger.win32.coff.*;
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30
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31 class AddressDataSource implements DataSource {
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32 AddressDataSource(Address addr) {
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33 this.addr = addr;
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34 offset = 0;
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35 }
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36
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37 public byte readByte() throws IOException {
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38 try {
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39 byte res = (byte) addr.getCIntegerAt(offset, 1, false);
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40 ++offset;
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41 return res;
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42 } catch (UnmappedAddressException e) {
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43 throw (IOException) new IOException("Unmapped address at 0x" + Long.toHexString(e.getAddress())).initCause(e);
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44 } catch (DebuggerException e) {
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45 throw (IOException) new IOException(e.toString()).initCause(e);
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46 }
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47 }
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48
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49 public short readShort() throws IOException {
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50 // NOTE: byte swapping is taken care of at the COFFFileImpl level
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51 int b1 = readByte() & 0xFF;
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52 int b2 = readByte() & 0xFF;
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53 return (short) ((b1 << 8) | b2);
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54 }
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55
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56 public int readInt() throws IOException {
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57 // NOTE: byte swapping is taken care of at the COFFFileImpl level
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58 int b1 = ((int) readByte()) & 0xFF;
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59 int b2 = ((int) readByte()) & 0xFF;
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60 int b3 = ((int) readByte()) & 0xFF;
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61 int b4 = ((int) readByte()) & 0xFF;
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62 return ((b1 << 24) | (b2 << 16) | (b3 << 8) | b4);
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63 }
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64
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65 public long readLong() throws IOException {
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66 // NOTE: byte swapping is taken care of at the COFFFileImpl level
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67 long b1 = ((long) readByte()) & 0xFFL;
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68 long b2 = ((long) readByte()) & 0xFFL;
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69 long b3 = ((long) readByte()) & 0xFFL;
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70 long b4 = ((long) readByte()) & 0xFFL;
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71 long b5 = ((long) readByte()) & 0xFFL;
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72 long b6 = ((long) readByte()) & 0xFFL;
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73 long b7 = ((long) readByte()) & 0xFFL;
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74 long b8 = ((long) readByte()) & 0xFFL;
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75 return (((((b1 << 24) | (b2 << 16) | (b3 << 8) | b4)) << 32) |
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76 ((((b5 << 24) | (b6 << 16) | (b7 << 8) | b8))));
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77 }
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78
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79 public int read(byte[] b) throws IOException {
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80 for (int i = 0; i < b.length; i++) {
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81 b[i] = readByte();
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82 }
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83 return b.length;
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84 }
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85
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86 public void seek(long pos) throws IOException {
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87 offset = pos;
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88 }
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89
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90 public long getFilePointer() throws IOException {
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91 return offset;
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92 }
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93
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94 public void close() throws IOException {
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95 }
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96
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97 private Address addr;
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98 private long offset;
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99 }
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