1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
/*
* Java Unix Sockets Library
*
* Copyright (c) Matthew Johnson 2004
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* To Contact the author, please email src@matthew.ath.cx
*
*/
package cx.ath.matthew.unix;
import java.io.InputStream;
import java.io.IOException;
public class USInputStream extends InputStream
{
public static final int MSG_DONTWAIT = 0x40;
private native int native_recv(int sock, byte[] b, int off, int len, int flags, int timeout) throws IOException;
private int sock;
boolean closed = false;
private byte[] onebuf = new byte[1];
private UnixSocket us;
private boolean blocking = true;
private int flags = 0;
private int timeout = 0;
public USInputStream(int sock, UnixSocket us)
{
this.sock = sock;
this.us = us;
}
public void close() throws IOException
{
closed = true;
us.close();
}
public boolean markSupported() { return false; }
public int read() throws IOException
{
int rv = 0;
while (0 >= rv) rv = read(onebuf);
if (-1 == rv) return -1;
return 0 > onebuf[0] ? -onebuf[0] : onebuf[0];
}
public int read(byte[] b, int off, int len) throws IOException
{
if (closed) throw new NotConnectedException();
int count = native_recv(sock, b, off, len, flags, timeout);
/* Yes, I really want to do this. Recv returns 0 for 'connection shut down'.
* read() returns -1 for 'end of stream.
* Recv returns -1 for 'EAGAIN' (all other errors cause an exception to be raised)
* whereas read() returns 0 for '0 bytes read', so yes, I really want to swap them here.
*/
if (0 == count) return -1;
else if (-1 == count) return 0;
else return count;
}
public boolean isClosed() { return closed; }
public UnixSocket getSocket() { return us; }
public void setBlocking(boolean enable)
{
flags = enable ? 0 : MSG_DONTWAIT;
}
public void setSoTimeout(int timeout)
{
this.timeout = timeout;
}
}
|
