0N/A/*
2362N/A * Copyright (c) 1998, 2006, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/A/* @test
0N/A @bug 4090383
0N/A @summary Ensure that BufferedInputStream's read method will fill the target
0N/A array whenever possible
0N/A */
0N/A
0N/A
0N/Aimport java.io.IOException;
0N/Aimport java.io.InputStream;
0N/Aimport java.io.BufferedInputStream;
0N/A
0N/A
0N/Apublic class Fill {
0N/A
0N/A /**
0N/A * A simple InputStream that is always ready but may read fewer than the
0N/A * requested number of bytes
0N/A */
0N/A static class Source extends InputStream {
0N/A
0N/A int shortFall;
0N/A byte next = 0;
0N/A
0N/A Source(int shortFall) {
0N/A this.shortFall = shortFall;
0N/A }
0N/A
0N/A public int read() throws IOException {
0N/A return next++;
0N/A }
0N/A
0N/A public int read(byte[] buf, int off, int len) throws IOException {
0N/A int n = len - shortFall;
0N/A for (int i = off; i < n; i++)
0N/A buf[i] = next++;
0N/A return n;
0N/A }
0N/A
0N/A public int available() {
0N/A return Integer.MAX_VALUE;
0N/A }
0N/A
0N/A public void close() throws IOException {
0N/A }
0N/A
0N/A }
0N/A
0N/A /**
0N/A * Test BufferedInputStream with an underlying source that always reads
0N/A * shortFall fewer bytes than requested
0N/A */
0N/A static void go(int shortFall) throws Exception {
0N/A
0N/A InputStream r = new BufferedInputStream(new Source(shortFall), 10);
0N/A byte[] buf = new byte[8];
0N/A
0N/A int n1 = r.read(buf);
0N/A int n2 = r.read(buf);
0N/A System.err.println("Shortfall " + shortFall
0N/A + ": Read " + n1 + ", then " + n2 + " bytes");
0N/A if (n1 != buf.length)
0N/A throw new Exception("First read returned " + n1);
0N/A if (n2 != buf.length)
0N/A throw new Exception("Second read returned " + n2);
0N/A
0N/A }
0N/A
0N/A public static void main(String[] args) throws Exception {
0N/A for (int i = 0; i < 8; i++) go(i);
0N/A }
0N/A
0N/A}