Fast Byte Array InputStream
//package web.sopo.util;
import java.io.InputStream;
public class FastByteArrayInputStream extends InputStream {
/**
* Our byte buffer
*/
protected byte[] buf = null;
/**
* Number of bytes that we can read from the buffer
*/
protected int count = 0;
/**
* Number of bytes that have been read from the buffer
*/
protected int pos = 0;
public FastByteArrayInputStream(byte[] buf, int count) {
this.buf = buf;
this.count = count;
}
public final int available() {
return count - pos;
}
public final int read() {
return (pos < count) ? (buf[pos++] & 0xff) : -1;
}
public final int read(byte[] b, int off, int len) {
if (pos >= count)
return -1;
if ((pos + len) > count)
len = (count - pos);
System.arraycopy(buf, pos, b, off, len);
pos += len;
return len;
}
public final long skip(long n) {
if ((pos + n) > count)
n = count - pos;
if (n < 0)
return 0;
pos += n;
return n;
}
}
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