Method skip

lib/java/io/FileInputStream.java:297–332

Skips count number of bytes in this stream. Subsequent read()'s will not return these bytes unless reset() is used. This method may perform multiple reads to read count bytes. @param count the number of bytes to skip. @return the number of bytes actually s

(long count)

     *             IOException occurs.
     */
    @Override
    public long skip(long count) throws IOException {
        openCheck();

        if (count == 0) {
            return 0;
        }
        if (count < 0) {
            // luni.AC=Number of bytes to skip cannot be negative
            throw new IOException(Messages.getString("luni.AC")); //$NON-NLS-1$
        }

        // stdin requires special handling
        if (fd == FileDescriptor.in) {
            // Read and discard count bytes in 8k chunks
            long skipped = 0, numRead;
            int chunk = count < 8192 ? (int) count : 8192;
            byte[] buffer = new byte[chunk];
            for (long i = count / chunk; i >= 0; i--) {
                numRead = fileSystem.ttyRead(buffer, 0, chunk);
                skipped += numRead;
                if (numRead < chunk) {
                    return skipped;
                }
            }
            return skipped;
        }

        synchronized (repositioningLock) {
            final long currentPosition = fileSystem.seek(fd.descriptor, 0L,
                    IFileSystem.SEEK_CUR);
            final long newPosition = fileSystem.seek(fd.descriptor,
                    currentPosition + count, IFileSystem.SEEK_SET);
            return newPosition - currentPosition;
        }
    }

    private synchronized void openCheck() throws IOException {
        if (fd.descriptor < 0) {