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1
5 package org.h2.util;
6
7 public class MemoryFile {
8 private String  name;
9 private int length;
10 private byte[] data;
11 private int pos;
12 private byte[] magic;
13
14 MemoryFile(String name) {
15 this.name = name;
16 data = new byte[16];
17 }
18
19 public String getName() {
20 return name;
21 }
22
23 public void setName(String name) {
24 this.name = name;
25 }
26
27 public long length() {
28 return length;
29 }
30
31 public void setLength(long l) {
32 length = (int)l;
33 }
34
35 public void seek(long pos) {
36 this.pos = (int)pos;
37 }
38
39 public void write(byte[] b, int off, int len) {
40 if(pos+len > length) {
41 length = pos+len;
42 }
43 if(pos+len > data.length) {
44 byte[] n = new byte[length*2];
45 System.arraycopy(data, 0, n, 0, data.length);
46 data = n;
47 }
48 System.arraycopy(b, off, data, pos, len);
49 pos += len;
50 }
51
52 public void readFully(byte[] b, int off, int len) {
53 if(pos+len > length) {
54 length = pos+len;
55 }
56 if(pos+len > data.length) {
57 byte[] n = new byte[length*2];
58 System.arraycopy(data, 0, n, 0, data.length);
59 data = n;
60 }
61 System.arraycopy(data, pos, b, off, len);
62 pos += len;
63 }
64
65 public long getFilePointer() {
66 return pos;
67 }
68
69 public void setMagic(byte[] magic) {
70 this.magic = magic;
71 }
72
73 public byte[] getMagic() {
74 return magic;
75 }
76 }
77 |
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