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annotate src/ch/ethz/ssh2/channel/ChannelInputStream.java @ 360:7eb24880b111
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| author | Carl Byington <carl@five-ten-sg.com> |
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| date | Mon, 04 Aug 2014 08:10:12 -0700 |
| parents | 071eccdff8ea |
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| rev | line source |
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1 /* |
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2 * Copyright (c) 2006-2011 Christian Plattner. All rights reserved. |
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3 * Please refer to the LICENSE.txt for licensing details. |
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4 */ |
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5 package ch.ethz.ssh2.channel; |
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6 |
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7 import java.io.IOException; |
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8 import java.io.InputStream; |
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9 |
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10 /** |
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11 * ChannelInputStream. |
| 307 | 12 * |
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13 * @author Christian Plattner |
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14 * @version 2.50, 03/15/10 |
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15 */ |
| 307 | 16 public final class ChannelInputStream extends InputStream { |
| 17 Channel c; | |
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18 |
| 307 | 19 boolean isClosed = false; |
| 20 boolean isEOF = false; | |
| 21 boolean extendedFlag = false; | |
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22 |
| 307 | 23 ChannelInputStream(Channel c, boolean isExtended) { |
| 24 this.c = c; | |
| 25 this.extendedFlag = isExtended; | |
| 26 } | |
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27 |
| 307 | 28 @Override |
| 29 public int available() throws IOException { | |
| 30 if (isEOF) | |
| 31 return 0; | |
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32 |
| 307 | 33 int avail = c.cm.getAvailable(c, extendedFlag); |
| 34 /* We must not return -1 on EOF */ | |
| 35 return (avail > 0) ? avail : 0; | |
| 36 } | |
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37 |
| 307 | 38 @Override |
| 39 public void close() throws IOException { | |
| 40 isClosed = true; | |
| 41 } | |
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42 |
| 307 | 43 @Override |
| 44 public int read(byte[] b, int off, int len) throws IOException { | |
| 45 if (b == null) | |
| 46 throw new NullPointerException(); | |
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47 |
| 307 | 48 if ((off < 0) || (len < 0) || ((off + len) > b.length) || ((off + len) < 0) || (off > b.length)) |
| 49 throw new IndexOutOfBoundsException(); | |
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50 |
| 307 | 51 if (len == 0) |
| 52 return 0; | |
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53 |
| 307 | 54 if (isEOF) |
| 55 return -1; | |
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56 |
| 307 | 57 int ret = c.cm.getChannelData(c, extendedFlag, b, off, len); |
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58 |
| 307 | 59 if (ret == -1) { |
| 60 isEOF = true; | |
| 61 } | |
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62 |
| 307 | 63 return ret; |
| 64 } | |
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65 |
| 307 | 66 @Override |
| 67 public int read(byte[] b) throws IOException { | |
| 68 return read(b, 0, b.length); | |
| 69 } | |
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70 |
| 307 | 71 @Override |
| 72 public int read() throws IOException { | |
| 73 /* Yes, this stream is pure and unbuffered, a single byte read() is slow */ | |
| 74 final byte b[] = new byte[1]; | |
| 75 int ret = read(b, 0, 1); | |
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76 |
| 307 | 77 if (ret != 1) |
| 78 return -1; | |
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79 |
| 307 | 80 return b[0] & 0xff; |
| 81 } | |
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82 } |