diff options
Diffstat (limited to 'src/main/java/ch/ethz/ssh2/channel/ChannelInputStream.java')
-rw-r--r-- | src/main/java/ch/ethz/ssh2/channel/ChannelInputStream.java | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/src/main/java/ch/ethz/ssh2/channel/ChannelInputStream.java b/src/main/java/ch/ethz/ssh2/channel/ChannelInputStream.java new file mode 100644 index 0000000..7d0ecd9 --- /dev/null +++ b/src/main/java/ch/ethz/ssh2/channel/ChannelInputStream.java @@ -0,0 +1,94 @@ +/* + * Copyright (c) 2006-2011 Christian Plattner. All rights reserved. + * Please refer to the LICENSE.txt for licensing details. + */ +package ch.ethz.ssh2.channel; + +import java.io.IOException; +import java.io.InputStream; + +/** + * ChannelInputStream. + * + * @author Christian Plattner + * @version 2.50, 03/15/10 + */ +public final class ChannelInputStream extends InputStream +{ + Channel c; + + boolean isClosed = false; + boolean isEOF = false; + boolean extendedFlag = false; + + ChannelInputStream(Channel c, boolean isExtended) + { + this.c = c; + this.extendedFlag = isExtended; + } + + @Override + public int available() throws IOException + { + if (isEOF) + return 0; + + int avail = c.cm.getAvailable(c, extendedFlag); + + /* We must not return -1 on EOF */ + + return (avail > 0) ? avail : 0; + } + + @Override + public void close() throws IOException + { + isClosed = true; + } + + @Override + public int read(byte[] b, int off, int len) throws IOException + { + if (b == null) + throw new NullPointerException(); + + if ((off < 0) || (len < 0) || ((off + len) > b.length) || ((off + len) < 0) || (off > b.length)) + throw new IndexOutOfBoundsException(); + + if (len == 0) + return 0; + + if (isEOF) + return -1; + + int ret = c.cm.getChannelData(c, extendedFlag, b, off, len); + + if (ret == -1) + { + isEOF = true; + } + + return ret; + } + + @Override + public int read(byte[] b) throws IOException + { + return read(b, 0, b.length); + } + + @Override + public int read() throws IOException + { + /* Yes, this stream is pure and unbuffered, a single byte read() is slow */ + + final byte b[] = new byte[1]; + + int ret = read(b, 0, 1); + + if (ret != 1) + return -1; + + return b[0] & 0xff; + } +} |