PackageReader.java 文件源码

LimitedBuffer(InputStream originalIn) {
    super(null, 1<<14);
    servedPos = pos;
    super.in = new FilterInputStream(originalIn) {
        public int read() throws IOException {
            if (buffered == limit)
                return -1;
            ++buffered;
            return super.read();
        }
        public int read(byte b[], int off, int len) throws IOException {
            if (buffered == limit)
                return -1;
            if (limit != -1) {
                long remaining = limit - buffered;
                if (len > remaining)
                    len = (int)remaining;
            }
            int nr = super.read(b, off, len);
            if (nr >= 0)  buffered += nr;
            return nr;
        }
    };
}