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// java.io.ByteArrayInputStream
// An implementation of the Java Language Specification section 22.6
// Written by Charles Briscoe-Smith; refer to the file LEGAL for details.
package java.io;
public class ByteArrayInputStream extends InputStream {
protected byte[] buf;
protected int pos;
protected int count;
public ByteArrayInputStream(byte[] b)
{
buf=b; pos=0; count=b.length;
}
public ByteArrayInputStream(byte[] b, int off, int len)
{
buf=b; pos=off; count=off+len;
}
public int read() throws NullPointerException, IndexOutOfBoundsException
{
if (pos==count) return -1;
return buf[pos++] & 0xff;
}
public int read(byte[] b, int off, int len)
throws NullPointerException, IndexOutOfBoundsException
{
if (pos==count) return -1;
if (len==0) return 0;
if (off<0 || len<0 || off+len>b.length)
throw new IndexOutOfBoundsException();
int read=count-pos;
if (len<read) read=len;
for (int i=read; i>0; i--) {
b[off++]=buf[pos++];
}
return read;
}
public long skip(long n)
{
int skipped=count-pos;
if (n<skipped) skipped=n;
pos+=skipped;
return skipped;
}
public int available()
{
return count-pos;
}
public void reset()
{
pos=0;
}
}
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