1 /* 2 * Copyright (c) 2002, 2020, 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 java.lang; 27 28 import jdk.internal.HotSpotIntrinsicCandidate; 29 30 /** The CharacterData class encapsulates the large tables found in 31 Java.lang.Character. */ 32 33 class CharacterDataLatin1 extends CharacterData { 34 35 /* The character properties are currently encoded into 32 bits in the following manner: 36 1 bit mirrored property 37 4 bits directionality property 38 9 bits signed offset used for converting case 39 1 bit if 1, adding the signed offset converts the character to lowercase 40 1 bit if 1, subtracting the signed offset converts the character to uppercase 41 1 bit if 1, this character has a titlecase equivalent (possibly itself) 42 3 bits 0 may not be part of an identifier 43 1 ignorable control; may continue a Unicode identifier or Java identifier 44 2 may continue a Java identifier but not a Unicode identifier (unused) 45 3 may continue a Unicode identifier or Java identifier 46 4 is a Java whitespace character 47 5 may start or continue a Java identifier; 48 may continue but not start a Unicode identifier (underscores) 49 6 may start or continue a Java identifier but not a Unicode identifier ($) 50 7 may start or continue a Unicode identifier or Java identifier 51 Thus: 52 5, 6, 7 may start a Java identifier 53 1, 2, 3, 5, 6, 7 may continue a Java identifier 54 7 may start a Unicode identifier 55 1, 3, 5, 7 may continue a Unicode identifier 56 1 is ignorable within an identifier 57 4 is Java whitespace 58 2 bits 0 this character has no numeric property 59 1 adding the digit offset to the character code and then 60 masking with 0x1F will produce the desired numeric value 61 2 this character has a "strange" numeric value 62 3 a Java supradecimal digit: adding the digit offset to the 63 character code, then masking with 0x1F, then adding 10 64 will produce the desired numeric value 65 5 bits digit offset 66 5 bits character type 67 68 The encoding of character properties is subject to change at any time. 69 */ 70 71 int getProperties(int ch) { 72 char offset = (char)ch; 73 int props = $$Lookup(offset); 74 return props; 75 } 76 77 int getPropertiesEx(int ch) { 78 char offset = (char)ch; 79 int props = $$LookupEx(offset); 80 return props; 81 } 82 83 @HotSpotIntrinsicCandidate 84 boolean isDigit(int ch) { 85 return '0' <= ch && ch <= '9'; 86 } 87 88 @HotSpotIntrinsicCandidate 89 boolean isLowerCase(int ch) { 90 int props = getProperties(ch); 91 return (props & $$maskType) == Character.LOWERCASE_LETTER; 92 } 93 94 @HotSpotIntrinsicCandidate 95 boolean isUpperCase(int ch) { 96 int props = getProperties(ch); 97 return (props & $$maskType) == Character.UPPERCASE_LETTER; 98 } 99 100 boolean isOtherLowercase(int ch) { 101 int props = getPropertiesEx(ch); 102 return (props & $$maskOtherLowercase) != 0; 103 } 104 105 boolean isOtherUppercase(int ch) { 106 int props = getPropertiesEx(ch); 107 return (props & $$maskOtherUppercase) != 0; 108 } 109 110 boolean isOtherAlphabetic(int ch) { 111 int props = getPropertiesEx(ch); 112 return (props & $$maskOtherAlphabetic) != 0; 113 } 114 115 boolean isIdeographic(int ch) { 116 int props = getPropertiesEx(ch); 117 return (props & $$maskIdeographic) != 0; 118 } 119 120 int getType(int ch) { 121 int props = getProperties(ch); 122 return (props & $$maskType); 123 } 124 125 boolean isJavaIdentifierStart(int ch) { 126 int props = getProperties(ch); 127 return ((props & $$maskIdentifierInfo) >= $$lowJavaStart); 128 } 129 130 boolean isJavaIdentifierPart(int ch) { 131 int props = getProperties(ch); 132 return ((props & $$nonzeroJavaPart) != 0); 133 } 134 135 boolean isUnicodeIdentifierStart(int ch) { 136 return (getPropertiesEx(ch) & $$maskIDStart) != 0; 137 } 138 139 boolean isUnicodeIdentifierPart(int ch) { 140 return (getPropertiesEx(ch) & $$maskIDContinue) != 0 || 141 isIdentifierIgnorable(ch); 142 } 143 144 boolean isIdentifierIgnorable(int ch) { 145 int props = getProperties(ch); 146 return ((props & $$maskIdentifierInfo) == $$valueIgnorable); 147 } 148 149 int toLowerCase(int ch) { 150 int mapChar = ch; 151 int val = getProperties(ch); 152 153 if (((val & $$maskLowerCase) != 0) && 154 ((val & $$maskCaseOffset) != $$maskCaseOffset)) { 155 int offset = val << $$shiftCaseOffsetSign >> ($$shiftCaseOffsetSign+$$shiftCaseOffset); 156 mapChar = ch + offset; 157 } 158 return mapChar; 159 } 160 161 int toUpperCase(int ch) { 162 int mapChar = ch; 163 int val = getProperties(ch); 164 165 if ((val & $$maskUpperCase) != 0) { 166 if ((val & $$maskCaseOffset) != $$maskCaseOffset) { 167 int offset = val << $$shiftCaseOffsetSign >> ($$shiftCaseOffsetSign+$$shiftCaseOffset); 168 mapChar = ch - offset; 169 } else if (ch == 0x00B5) { 170 mapChar = 0x039C; 171 } 172 } 173 return mapChar; 174 } 175 176 int toTitleCase(int ch) { 177 return toUpperCase(ch); 178 } 179 180 // Digit values for codePoints in the 0-255 range. Contents generated using: 181 // for (char i = 0; i < 256; i++) { 182 // int v = -1; 183 // if (i >= '0' && i <= '9') { v = i - '0'; } 184 // else if (i >= 'A' && i <= 'Z') { v = i - 'A' + 10; } 185 // else if (i >= 'a' && i <= 'z') { v = i - 'a' + 10; } 186 // if (i % 20 == 0) System.out.println(); 187 // System.out.printf("%2d, ", v); 188 // } 189 // 190 // Analysis has shown that generating the whole array allows the JIT to generate 191 // better code compared to a slimmed down array, such as one cutting off after 'z' 192 private static final byte[] DIGITS = new byte[] { 193 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 194 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 195 -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, 196 -1, -1, -1, -1, -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 197 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, -1, 10, 11, 12, 198 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 199 33, 34, 35, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 200 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 201 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 202 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 203 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 204 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 205 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }; 206 207 int digit(int ch, int radix) { 208 int value = DIGITS[ch]; 209 return (value >= 0 && value < radix && radix >= Character.MIN_RADIX 210 && radix <= Character.MAX_RADIX) ? value : -1; 211 } 212 213 int getNumericValue(int ch) { 214 int val = getProperties(ch); 215 int retval = -1; 216 217 switch (val & $$maskNumericType) { 218 default: // cannot occur 219 case ($$valueNotNumeric): // not numeric 220 retval = -1; 221 break; 222 case ($$valueDigit): // simple numeric 223 retval = ch + ((val & $$maskDigitOffset) >> $$shiftDigitOffset) & $$maskDigit; 224 break; 225 case ($$valueStrangeNumeric) : // "strange" numeric 226 retval = -2; 227 break; 228 case ($$valueJavaSupradecimal): // Java supradecimal 229 retval = (ch + ((val & $$maskDigitOffset) >> $$shiftDigitOffset) & $$maskDigit) + 10; 230 break; 231 } 232 return retval; 233 } 234 235 @HotSpotIntrinsicCandidate 236 boolean isWhitespace(int ch) { 237 int props = getProperties(ch); 238 return ((props & $$maskIdentifierInfo) == $$valueJavaWhitespace); 239 } 240 241 byte getDirectionality(int ch) { 242 int val = getProperties(ch); 243 byte directionality = (byte)((val & $$maskBidi) >> $$shiftBidi); 244 245 if (directionality == 0xF ) { 246 directionality = -1; 247 } 248 return directionality; 249 } 250 251 boolean isMirrored(int ch) { 252 int props = getProperties(ch); 253 return ((props & $$maskMirrored) != 0); 254 } 255 256 int toUpperCaseEx(int ch) { 257 int mapChar = ch; 258 int val = getProperties(ch); 259 260 if ((val & $$maskUpperCase) != 0) { 261 if ((val & $$maskCaseOffset) != $$maskCaseOffset) { 262 int offset = val << $$shiftCaseOffsetSign >> ($$shiftCaseOffsetSign+$$shiftCaseOffset); 263 mapChar = ch - offset; 264 } 265 else { 266 switch(ch) { 267 // map overflow characters 268 case 0x00B5 : mapChar = 0x039C; break; 269 default : mapChar = Character.ERROR; break; 270 } 271 } 272 } 273 return mapChar; 274 } 275 276 static char[] sharpsMap = new char[] {'S', 'S'}; 277 278 char[] toUpperCaseCharArray(int ch) { 279 char[] upperMap = {(char)ch}; 280 if (ch == 0x00DF) { 281 upperMap = sharpsMap; 282 } 283 return upperMap; 284 } 285 286 static final CharacterDataLatin1 instance = new CharacterDataLatin1(); 287 private CharacterDataLatin1() {}; 288 289 $$Tables 290 291 static { 292 $$Initializers 293 } 294 } 295