Fast Byte Array InputStream : Byte Array « File Input Output « Java

Fast Byte Array InputStream

//package web.sopo.util;


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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