1 /* |
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2 * Copyright (c) 2005, 2009, 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 * (C) Copyright IBM Corp. and others, 1996-2009 - All Rights Reserved * |
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28 * * |
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29 * The original version of this source code and documentation is copyrighted * |
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30 * and owned by IBM, These materials are provided under terms of a License * |
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31 * Agreement between IBM and Sun. This technology is protected by multiple * |
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32 * US and International patents. This notice and attribution to IBM may not * |
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33 * to removed. * |
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34 ******************************************************************************* |
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35 */ |
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36 |
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37 package sun.text.normalizer; |
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38 |
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39 import java.io.DataInputStream; |
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40 import java.io.InputStream; |
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41 import java.io.IOException; |
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42 |
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43 /** |
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44 * <p>Internal reader class for ICU data file uprops.icu containing |
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45 * Unicode codepoint data.</p> |
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46 * <p>This class simply reads uprops.icu, authenticates that it is a valid |
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47 * ICU data file and split its contents up into blocks of data for use in |
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48 * <a href=UCharacterProperty.html>com.ibm.icu.impl.UCharacterProperty</a>. |
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49 * </p> |
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50 * <p>uprops.icu which is in big-endian format is jared together with this |
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51 * package.</p> |
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52 * |
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53 * Unicode character properties file format see |
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54 * (ICU4C)/source/tools/genprops/store.c |
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55 * |
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56 * @author Syn Wee Quek |
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57 * @since release 2.1, February 1st 2002 |
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58 */ |
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59 final class UCharacterPropertyReader implements ICUBinary.Authenticate |
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60 { |
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61 // public methods ---------------------------------------------------- |
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62 |
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63 public boolean isDataVersionAcceptable(byte version[]) |
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64 { |
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65 return version[0] == DATA_FORMAT_VERSION_[0] |
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66 && version[2] == DATA_FORMAT_VERSION_[2] |
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67 && version[3] == DATA_FORMAT_VERSION_[3]; |
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68 } |
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69 |
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70 // protected constructor --------------------------------------------- |
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71 |
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72 /** |
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73 * <p>Protected constructor.</p> |
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74 * @param inputStream ICU uprop.dat file input stream |
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75 * @exception IOException throw if data file fails authentication |
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76 */ |
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77 protected UCharacterPropertyReader(InputStream inputStream) |
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78 throws IOException |
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79 { |
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80 m_unicodeVersion_ = ICUBinary.readHeader(inputStream, DATA_FORMAT_ID_, |
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81 this); |
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82 m_dataInputStream_ = new DataInputStream(inputStream); |
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83 } |
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84 |
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85 // protected methods ------------------------------------------------- |
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86 |
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87 /** |
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88 * <p>Reads uprops.icu, parse it into blocks of data to be stored in |
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89 * UCharacterProperty.</P |
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90 * @param ucharppty UCharacterProperty instance |
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91 * @exception IOException thrown when data reading fails |
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92 */ |
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93 protected void read(UCharacterProperty ucharppty) throws IOException |
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94 { |
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95 // read the indexes |
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96 int count = INDEX_SIZE_; |
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97 m_propertyOffset_ = m_dataInputStream_.readInt(); |
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98 count --; |
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99 m_exceptionOffset_ = m_dataInputStream_.readInt(); |
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100 count --; |
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101 m_caseOffset_ = m_dataInputStream_.readInt(); |
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102 count --; |
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103 m_additionalOffset_ = m_dataInputStream_.readInt(); |
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104 count --; |
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105 m_additionalVectorsOffset_ = m_dataInputStream_.readInt(); |
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106 count --; |
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107 m_additionalColumnsCount_ = m_dataInputStream_.readInt(); |
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108 count --; |
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109 m_reservedOffset_ = m_dataInputStream_.readInt(); |
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110 count --; |
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111 m_dataInputStream_.skipBytes(3 << 2); |
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112 count -= 3; |
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113 ucharppty.m_maxBlockScriptValue_ = m_dataInputStream_.readInt(); |
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114 count --; // 10 |
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115 ucharppty.m_maxJTGValue_ = m_dataInputStream_.readInt(); |
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116 count --; // 11 |
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117 m_dataInputStream_.skipBytes(count << 2); |
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118 |
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119 // read the trie index block |
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120 // m_props_index_ in terms of ints |
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121 ucharppty.m_trie_ = new CharTrie(m_dataInputStream_, null); |
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122 |
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123 // skip the 32 bit properties block |
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124 int size = m_exceptionOffset_ - m_propertyOffset_; |
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125 m_dataInputStream_.skipBytes(size * 4); |
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126 |
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127 // reads the 32 bit exceptions block |
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128 size = m_caseOffset_ - m_exceptionOffset_; |
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129 m_dataInputStream_.skipBytes(size * 4); |
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130 |
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131 // reads the 32 bit case block |
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132 size = (m_additionalOffset_ - m_caseOffset_) << 1; |
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133 m_dataInputStream_.skipBytes(size * 2); |
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134 |
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135 if(m_additionalColumnsCount_ > 0) { |
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136 // reads the additional property block |
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137 ucharppty.m_additionalTrie_ = new CharTrie(m_dataInputStream_, null); |
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138 |
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139 // additional properties |
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140 size = m_reservedOffset_ - m_additionalVectorsOffset_; |
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141 ucharppty.m_additionalVectors_ = new int[size]; |
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142 for (int i = 0; i < size; i ++) { |
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143 ucharppty.m_additionalVectors_[i] = m_dataInputStream_.readInt(); |
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144 } |
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145 } |
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146 |
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147 m_dataInputStream_.close(); |
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148 ucharppty.m_additionalColumnsCount_ = m_additionalColumnsCount_; |
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149 ucharppty.m_unicodeVersion_ = VersionInfo.getInstance( |
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150 (int)m_unicodeVersion_[0], (int)m_unicodeVersion_[1], |
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151 (int)m_unicodeVersion_[2], (int)m_unicodeVersion_[3]); |
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152 } |
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153 |
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154 // private variables ------------------------------------------------- |
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155 |
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156 /** |
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157 * Index size |
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158 */ |
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159 private static final int INDEX_SIZE_ = 16; |
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160 |
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161 /** |
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162 * ICU data file input stream |
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163 */ |
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164 private DataInputStream m_dataInputStream_; |
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165 |
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166 /** |
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167 * Offset information in the indexes. |
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168 */ |
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169 private int m_propertyOffset_; |
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170 private int m_exceptionOffset_; |
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171 private int m_caseOffset_; |
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172 private int m_additionalOffset_; |
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173 private int m_additionalVectorsOffset_; |
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174 private int m_additionalColumnsCount_; |
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175 private int m_reservedOffset_; |
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176 private byte m_unicodeVersion_[]; |
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177 |
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178 /** |
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179 * Data format "UPro". |
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180 */ |
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181 private static final byte DATA_FORMAT_ID_[] = {(byte)0x55, (byte)0x50, |
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182 (byte)0x72, (byte)0x6F}; |
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183 /** |
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184 * Format version; this code works with all versions with the same major |
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185 * version number and the same Trie bit distribution. |
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186 */ |
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187 private static final byte DATA_FORMAT_VERSION_[] = {(byte)0x5, (byte)0, |
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188 (byte)Trie.INDEX_STAGE_1_SHIFT_, |
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189 (byte)Trie.INDEX_STAGE_2_SHIFT_}; |
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190 } |
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