1 /* 2 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.tools.common; 27 28 import java.io.BufferedInputStream; 29 import java.io.IOException; 30 import java.io.InputStream; 31 import java.io.InputStreamReader; 32 import java.io.PrintStream; 33 import java.util.Arrays; 34 35 /** 36 * A helper class which prints the content of input streams to print streams. 37 */ 38 public class PrintStreamPrinter { 39 40 /** 41 * Reads characters in UTF-8 format from the input stream and prints them 42 * with the given print stream. Closes the input stream before it returns. 43 * 44 * @return The number of printed characters. 45 */ 46 public static long drainUTF8(InputStream is, PrintStream ps) throws IOException { 47 long result = 0; 48 49 try (BufferedInputStream bis = new BufferedInputStream(is); 50 InputStreamReader isr = new InputStreamReader(bis, "UTF-8")) { 51 char c[] = new char[8192]; 52 int n; 53 54 do { 55 n = isr.read(c); 56 57 if (n > 0) { 58 result += n; 59 System.out.print(n == c.length ? c : Arrays.copyOf(c, n)); 60 } 61 } while (n > 0); 62 } 63 64 return result; 65 } 66 }