1/*
2 * Copyright (c) 1997, 2013, 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
26package com.sun.xml.internal.ws.util;
27
28import java.io.InputStream;
29import java.io.IOException;
30import java.io.OutputStream;
31
32/**
33 * Copied from mail.jar.
34 */
35public class ASCIIUtility {
36    // Private constructor so that this class is not instantiated
37    private ASCIIUtility() { }
38
39
40    /**
41     * Convert the bytes within the specified range of the given byte
42     * array into a signed integer in the given radix . The range extends
43     * from <code>start</code> till, but not including <code>end</code>. <p>
44     *
45     * Based on java.lang.Integer.parseInt()
46     */
47    public static int parseInt(byte[] b, int start, int end, int radix)
48        throws NumberFormatException {
49        if (b == null)
50            throw new NumberFormatException("null");
51
52        int result = 0;
53        boolean negative = false;
54        int i = start;
55        int limit;
56        int multmin;
57        int digit;
58
59        if (end > start) {
60            if (b[i] == '-') {
61                negative = true;
62                limit = Integer.MIN_VALUE;
63                i++;
64            } else {
65                limit = -Integer.MAX_VALUE;
66            }
67            multmin = limit / radix;
68            if (i < end) {
69                digit = Character.digit((char)b[i++], radix);
70                if (digit < 0) {
71                    throw new NumberFormatException(
72                    "illegal number: " + toString(b, start, end)
73                    );
74                } else {
75                    result = -digit;
76                }
77            }
78            while (i < end) {
79                // Accumulating negatively avoids surprises near MAX_VALUE
80                digit = Character.digit((char)b[i++], radix);
81                if (digit < 0) {
82                    throw new NumberFormatException("illegal number");
83                }
84                if (result < multmin) {
85                    throw new NumberFormatException("illegal number");
86                }
87                result *= radix;
88                if (result < limit + digit) {
89                    throw new NumberFormatException("illegal number");
90                }
91                result -= digit;
92            }
93        } else {
94            throw new NumberFormatException("illegal number");
95        }
96        if (negative) {
97            if (i > start + 1) {
98                return result;
99            } else {    /* Only got "-" */
100                throw new NumberFormatException("illegal number");
101            }
102        } else {
103            return -result;
104        }
105    }
106
107    /**
108     * Convert the bytes within the specified range of the given byte
109     * array into a String. The range extends from <code>start</code>
110     * till, but not including <code>end</code>. <p>
111     */
112    public static String toString(byte[] b, int start, int end) {
113        int size = end - start;
114        char[] theChars = new char[size];
115
116        for (int i = 0, j = start; i < size; )
117            theChars[i++] = (char)(b[j++]&0xff);
118
119        return new String(theChars);
120    }
121
122    public static void copyStream(InputStream is, OutputStream out) throws IOException {
123        int size = 1024;
124        byte[] buf = new byte[size];
125        int len;
126
127        while ((len = is.read(buf, 0, size)) != -1)
128            out.write(buf, 0, len);
129    }
130}
131