J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2002-2006 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package java.lang; |
| 27 | |
| 28 | /** The CharacterData class encapsulates the large tables found in |
| 29 | Java.lang.Character. */ |
| 30 | |
| 31 | class CharacterDataLatin1 extends CharacterData { |
| 32 | |
| 33 | /* The character properties are currently encoded into 32 bits in the following manner: |
| 34 | 1 bit mirrored property |
| 35 | 4 bits directionality property |
| 36 | 9 bits signed offset used for converting case |
| 37 | 1 bit if 1, adding the signed offset converts the character to lowercase |
| 38 | 1 bit if 1, subtracting the signed offset converts the character to uppercase |
| 39 | 1 bit if 1, this character has a titlecase equivalent (possibly itself) |
| 40 | 3 bits 0 may not be part of an identifier |
| 41 | 1 ignorable control; may continue a Unicode identifier or Java identifier |
| 42 | 2 may continue a Java identifier but not a Unicode identifier (unused) |
| 43 | 3 may continue a Unicode identifier or Java identifier |
| 44 | 4 is a Java whitespace character |
| 45 | 5 may start or continue a Java identifier; |
| 46 | may continue but not start a Unicode identifier (underscores) |
| 47 | 6 may start or continue a Java identifier but not a Unicode identifier ($) |
| 48 | 7 may start or continue a Unicode identifier or Java identifier |
| 49 | Thus: |
| 50 | 5, 6, 7 may start a Java identifier |
| 51 | 1, 2, 3, 5, 6, 7 may continue a Java identifier |
| 52 | 7 may start a Unicode identifier |
| 53 | 1, 3, 5, 7 may continue a Unicode identifier |
| 54 | 1 is ignorable within an identifier |
| 55 | 4 is Java whitespace |
| 56 | 2 bits 0 this character has no numeric property |
| 57 | 1 adding the digit offset to the character code and then |
| 58 | masking with 0x1F will produce the desired numeric value |
| 59 | 2 this character has a "strange" numeric value |
| 60 | 3 a Java supradecimal digit: adding the digit offset to the |
| 61 | character code, then masking with 0x1F, then adding 10 |
| 62 | will produce the desired numeric value |
| 63 | 5 bits digit offset |
| 64 | 5 bits character type |
| 65 | |
| 66 | The encoding of character properties is subject to change at any time. |
| 67 | */ |
| 68 | |
| 69 | int getProperties(int ch) { |
| 70 | char offset = (char)ch; |
| 71 | int props = $$Lookup(offset); |
| 72 | return props; |
| 73 | } |
| 74 | |
| 75 | int getType(int ch) { |
| 76 | int props = getProperties(ch); |
| 77 | return (props & $$maskType); |
| 78 | } |
| 79 | |
| 80 | boolean isJavaIdentifierStart(int ch) { |
| 81 | int props = getProperties(ch); |
| 82 | return ((props & $$maskIdentifierInfo) >= $$lowJavaStart); |
| 83 | } |
| 84 | |
| 85 | boolean isJavaIdentifierPart(int ch) { |
| 86 | int props = getProperties(ch); |
| 87 | return ((props & $$nonzeroJavaPart) != 0); |
| 88 | } |
| 89 | |
| 90 | boolean isUnicodeIdentifierStart(int ch) { |
| 91 | int props = getProperties(ch); |
| 92 | return ((props & $$maskIdentifierInfo) == $$valueUnicodeStart); |
| 93 | } |
| 94 | |
| 95 | boolean isUnicodeIdentifierPart(int ch) { |
| 96 | int props = getProperties(ch); |
| 97 | return ((props & $$maskUnicodePart) != 0); |
| 98 | } |
| 99 | |
| 100 | boolean isIdentifierIgnorable(int ch) { |
| 101 | int props = getProperties(ch); |
| 102 | return ((props & $$maskIdentifierInfo) == $$valueIgnorable); |
| 103 | } |
| 104 | |
| 105 | int toLowerCase(int ch) { |
| 106 | int mapChar = ch; |
| 107 | int val = getProperties(ch); |
| 108 | |
| 109 | if (((val & $$maskLowerCase) != 0) && |
| 110 | ((val & $$maskCaseOffset) != $$maskCaseOffset)) { |
| 111 | int offset = val << $$shiftCaseOffsetSign >> ($$shiftCaseOffsetSign+$$shiftCaseOffset); |
| 112 | mapChar = ch + offset; |
| 113 | } |
| 114 | return mapChar; |
| 115 | } |
| 116 | |
| 117 | int toUpperCase(int ch) { |
| 118 | int mapChar = ch; |
| 119 | int val = getProperties(ch); |
| 120 | |
| 121 | if ((val & $$maskUpperCase) != 0) { |
| 122 | if ((val & $$maskCaseOffset) != $$maskCaseOffset) { |
| 123 | int offset = val << $$shiftCaseOffsetSign >> ($$shiftCaseOffsetSign+$$shiftCaseOffset); |
| 124 | mapChar = ch - offset; |
| 125 | } else if (ch == 0x00B5) { |
| 126 | mapChar = 0x039C; |
| 127 | } |
| 128 | } |
| 129 | return mapChar; |
| 130 | } |
| 131 | |
| 132 | int toTitleCase(int ch) { |
| 133 | return toUpperCase(ch); |
| 134 | } |
| 135 | |
| 136 | int digit(int ch, int radix) { |
| 137 | int value = -1; |
| 138 | if (radix >= Character.MIN_RADIX && radix <= Character.MAX_RADIX) { |
| 139 | int val = getProperties(ch); |
| 140 | int kind = val & $$maskType; |
| 141 | if (kind == Character.DECIMAL_DIGIT_NUMBER) { |
| 142 | value = ch + ((val & $$maskDigitOffset) >> $$shiftDigitOffset) & $$maskDigit; |
| 143 | } |
| 144 | else if ((val & $$maskNumericType) == $$valueJavaSupradecimal) { |
| 145 | // Java supradecimal digit |
| 146 | value = (ch + ((val & $$maskDigitOffset) >> $$shiftDigitOffset) & $$maskDigit) + 10; |
| 147 | } |
| 148 | } |
| 149 | return (value < radix) ? value : -1; |
| 150 | } |
| 151 | |
| 152 | int getNumericValue(int ch) { |
| 153 | int val = getProperties(ch); |
| 154 | int retval = -1; |
| 155 | |
| 156 | switch (val & $$maskNumericType) { |
| 157 | default: // cannot occur |
| 158 | case ($$valueNotNumeric): // not numeric |
| 159 | retval = -1; |
| 160 | break; |
| 161 | case ($$valueDigit): // simple numeric |
| 162 | retval = ch + ((val & $$maskDigitOffset) >> $$shiftDigitOffset) & $$maskDigit; |
| 163 | break; |
| 164 | case ($$valueStrangeNumeric) : // "strange" numeric |
| 165 | retval = -2; |
| 166 | break; |
| 167 | case ($$valueJavaSupradecimal): // Java supradecimal |
| 168 | retval = (ch + ((val & $$maskDigitOffset) >> $$shiftDigitOffset) & $$maskDigit) + 10; |
| 169 | break; |
| 170 | } |
| 171 | return retval; |
| 172 | } |
| 173 | |
| 174 | boolean isWhitespace(int ch) { |
| 175 | int props = getProperties(ch); |
| 176 | return ((props & $$maskIdentifierInfo) == $$valueJavaWhitespace); |
| 177 | } |
| 178 | |
| 179 | byte getDirectionality(int ch) { |
| 180 | int val = getProperties(ch); |
| 181 | byte directionality = (byte)((val & $$maskBidi) >> $$shiftBidi); |
| 182 | |
| 183 | if (directionality == 0xF ) { |
| 184 | directionality = -1; |
| 185 | } |
| 186 | return directionality; |
| 187 | } |
| 188 | |
| 189 | boolean isMirrored(int ch) { |
| 190 | int props = getProperties(ch); |
| 191 | return ((props & $$maskMirrored) != 0); |
| 192 | } |
| 193 | |
| 194 | int toUpperCaseEx(int ch) { |
| 195 | int mapChar = ch; |
| 196 | int val = getProperties(ch); |
| 197 | |
| 198 | if ((val & $$maskUpperCase) != 0) { |
| 199 | if ((val & $$maskCaseOffset) != $$maskCaseOffset) { |
| 200 | int offset = val << $$shiftCaseOffsetSign >> ($$shiftCaseOffsetSign+$$shiftCaseOffset); |
| 201 | mapChar = ch - offset; |
| 202 | } |
| 203 | else { |
| 204 | switch(ch) { |
| 205 | // map overflow characters |
| 206 | case 0x00B5 : mapChar = 0x039C; break; |
| 207 | default : mapChar = Character.ERROR; break; |
| 208 | } |
| 209 | } |
| 210 | } |
| 211 | return mapChar; |
| 212 | } |
| 213 | |
| 214 | static char[] sharpsMap = new char[] {'S', 'S'}; |
| 215 | |
| 216 | char[] toUpperCaseCharArray(int ch) { |
| 217 | char[] upperMap = {(char)ch}; |
| 218 | if (ch == 0x00DF) { |
| 219 | upperMap = sharpsMap; |
| 220 | } |
| 221 | return upperMap; |
| 222 | } |
| 223 | |
| 224 | static final CharacterDataLatin1 instance = new CharacterDataLatin1(); |
| 225 | private CharacterDataLatin1() {}; |
| 226 | |
| 227 | $$Tables |
| 228 | |
| 229 | static { |
| 230 | $$Initializers |
| 231 | } |
| 232 | } |
| 233 | |