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comparison src/com/trilead/ssh2/channel/ChannelInputStream.java @ 0:0ce5cc452d02

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initial version
author Carl Byington <carl@five-ten-sg.com>
date Thu, 22 May 2014 10:41:19 -0700
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-1:000000000000 0:0ce5cc452d02
1
2 package com.trilead.ssh2.channel;
3
4 import java.io.IOException;
5 import java.io.InputStream;
6
7 /**
8 * ChannelInputStream.
9 *
10 * @author Christian Plattner, plattner@trilead.com
11 * @version $Id: ChannelInputStream.java,v 1.1 2007/10/15 12:49:56 cplattne Exp $
12 */
13 public final class ChannelInputStream extends InputStream {
14 Channel c;
15
16 boolean isClosed = false;
17 boolean isEOF = false;
18 boolean extendedFlag = false;
19
20 ChannelInputStream(Channel c, boolean isExtended) {
21 this.c = c;
22 this.extendedFlag = isExtended;
23 }
24
25 public int available() throws IOException {
26 if (isEOF)
27 return 0;
28
29 int avail = c.cm.getAvailable(c, extendedFlag);
30 /* We must not return -1 on EOF */
31 return (avail > 0) ? avail : 0;
32 }
33
34 public void close() throws IOException {
35 isClosed = true;
36 }
37
38 public int read(byte[] b, int off, int len) throws IOException {
39 if (b == null)
40 throw new NullPointerException();
41
42 if ((off < 0) || (len < 0) || ((off + len) > b.length) || ((off + len) < 0) || (off > b.length))
43 throw new IndexOutOfBoundsException();
44
45 if (len == 0)
46 return 0;
47
48 if (isEOF)
49 return -1;
50
51 int ret = c.cm.getChannelData(c, extendedFlag, b, off, len);
52
53 if (ret == -1) {
54 isEOF = true;
55 }
56
57 return ret;
58 }
59
60 public int read(byte[] b) throws IOException {
61 return read(b, 0, b.length);
62 }
63
64 public int read() throws IOException {
65 /* Yes, this stream is pure and unbuffered, a single byte read() is slow */
66 final byte b[] = new byte[1];
67 int ret = read(b, 0, 1);
68
69 if (ret != 1)
70 return -1;
71
72 return b[0] & 0xff;
73 }
74 }