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1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 /* |
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27 * @(#)ASCIIUtility.java 1.9 02/03/27 |
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28 */ |
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29 |
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30 |
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31 package com.sun.xml.internal.messaging.saaj.packaging.mime.util; |
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32 |
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33 import com.sun.xml.internal.messaging.saaj.util.ByteOutputStream; |
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34 |
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35 import java.io.*; |
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36 |
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37 public class ASCIIUtility { |
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38 |
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39 // Private constructor so that this class is not instantiated |
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40 private ASCIIUtility() { } |
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41 |
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42 |
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43 /** |
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44 * Convert the bytes within the specified range of the given byte |
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45 * array into a signed integer in the given radix . The range extends |
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46 * from <code>start</code> till, but not including <code>end</code>. <p> |
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47 * |
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48 * Based on java.lang.Integer.parseInt() |
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49 */ |
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50 public static int parseInt(byte[] b, int start, int end, int radix) |
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51 throws NumberFormatException { |
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52 if (b == null) |
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53 throw new NumberFormatException("null"); |
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54 |
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55 int result = 0; |
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56 boolean negative = false; |
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57 int i = start; |
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58 int limit; |
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59 int multmin; |
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60 int digit; |
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61 |
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62 if (end > start) { |
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63 if (b[i] == '-') { |
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64 negative = true; |
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65 limit = Integer.MIN_VALUE; |
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66 i++; |
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67 } else { |
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68 limit = -Integer.MAX_VALUE; |
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69 } |
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70 multmin = limit / radix; |
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71 if (i < end) { |
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72 digit = Character.digit((char)b[i++], radix); |
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73 if (digit < 0) { |
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74 throw new NumberFormatException( |
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75 "illegal number: " + toString(b, start, end) |
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76 ); |
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77 } else { |
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78 result = -digit; |
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79 } |
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80 } |
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81 while (i < end) { |
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82 // Accumulating negatively avoids surprises near MAX_VALUE |
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83 digit = Character.digit((char)b[i++], radix); |
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84 if (digit < 0) { |
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85 throw new NumberFormatException("illegal number"); |
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86 } |
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87 if (result < multmin) { |
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88 throw new NumberFormatException("illegal number"); |
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89 } |
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90 result *= radix; |
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91 if (result < limit + digit) { |
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92 throw new NumberFormatException("illegal number"); |
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93 } |
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94 result -= digit; |
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95 } |
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96 } else { |
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97 throw new NumberFormatException("illegal number"); |
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98 } |
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99 if (negative) { |
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100 if (i > start + 1) { |
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101 return result; |
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102 } else { /* Only got "-" */ |
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103 throw new NumberFormatException("illegal number"); |
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104 } |
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105 } else { |
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106 return -result; |
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107 } |
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108 } |
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109 |
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110 /** |
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111 * Convert the bytes within the specified range of the given byte |
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112 * array into a String. The range extends from <code>start</code> |
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113 * till, but not including <code>end</code>. <p> |
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114 */ |
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115 public static String toString(byte[] b, int start, int end) { |
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116 int size = end - start; |
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117 char[] theChars = new char[size]; |
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118 |
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119 for (int i = 0, j = start; i < size; ) |
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120 theChars[i++] = (char)(b[j++]&0xff); |
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121 |
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122 return new String(theChars); |
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123 } |
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124 |
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125 public static byte[] getBytes(String s) { |
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126 char [] chars= s.toCharArray(); |
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127 int size = chars.length; |
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128 byte[] bytes = new byte[size]; |
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129 |
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130 for (int i = 0; i < size;) |
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131 bytes[i] = (byte) chars[i++]; |
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132 return bytes; |
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133 } |
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134 |
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135 /** |
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136 * |
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137 * @deprecated |
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138 * this is an expensive operation that require an additional |
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139 * buffer reallocation just to get the array of an exact size. |
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140 * Unless you absolutely need the exact size array, don't use this. |
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141 * Use {@link ByteOutputStream} and {@link ByteOutputStream#write(InputStream)}. |
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142 */ |
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143 public static byte[] getBytes(InputStream is) throws IOException { |
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144 ByteOutputStream bos = new ByteOutputStream(); |
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145 try { |
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146 bos.write(is); |
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147 } finally { |
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148 is.close(); |
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149 } |
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150 return bos.toByteArray(); |
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151 } |
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152 } |