/* * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package java.lang; /** The CharacterData class encapsulates the large tables found in Java.lang.Character. */ class CharacterData0E extends CharacterData { /* The character properties are currently encoded into 32 bits in the following manner: 1 bit mirrored property 4 bits directionality property 9 bits signed offset used for converting case 1 bit if 1, adding the signed offset converts the character to lowercase 1 bit if 1, subtracting the signed offset converts the character to uppercase 1 bit if 1, this character has a titlecase equivalent (possibly itself) 3 bits 0 may not be part of an identifier 1 ignorable control; may continue a Unicode identifier or Java identifier 2 may continue a Java identifier but not a Unicode identifier (unused) 3 may continue a Unicode identifier or Java identifier 4 is a Java whitespace character 5 may start or continue a Java identifier; may continue but not start a Unicode identifier (underscores) 6 may start or continue a Java identifier but not a Unicode identifier ($) 7 may start or continue a Unicode identifier or Java identifier Thus: 5, 6, 7 may start a Java identifier 1, 2, 3, 5, 6, 7 may continue a Java identifier 7 may start a Unicode identifier 1, 3, 5, 7 may continue a Unicode identifier 1 is ignorable within an identifier 4 is Java whitespace 2 bits 0 this character has no numeric property 1 adding the digit offset to the character code and then masking with 0x1F will produce the desired numeric value 2 this character has a "strange" numeric value 3 a Java supradecimal digit: adding the digit offset to the character code, then masking with 0x1F, then adding 10 will produce the desired numeric value 5 bits digit offset 5 bits character type The encoding of character properties is subject to change at any time. */ int getProperties(int ch) { char offset = (char)ch; int props = $$Lookup(offset); return props; } int getPropertiesEx(int ch) { char offset = (char)ch; int props = $$LookupEx(offset); return props; } boolean isOtherLowercase(int ch) { int props = getPropertiesEx(ch); return (props & $$maskOtherLowercase) != 0; } boolean isOtherUppercase(int ch) { int props = getPropertiesEx(ch); return (props & $$maskOtherUppercase) != 0; } boolean isOtherAlphabetic(int ch) { int props = getPropertiesEx(ch); return (props & $$maskOtherAlphabetic) != 0; } boolean isIdeographic(int ch) { int props = getPropertiesEx(ch); return (props & $$maskIdeographic) != 0; } int getType(int ch) { int props = getProperties(ch); return (props & $$maskType); } boolean isJavaIdentifierStart(int ch) { int props = getProperties(ch); return ((props & $$maskIdentifierInfo) >= $$lowJavaStart); } boolean isJavaIdentifierPart(int ch) { int props = getProperties(ch); return ((props & $$nonzeroJavaPart) != 0); } boolean isUnicodeIdentifierStart(int ch) { int props = getProperties(ch); return ((props & $$maskIdentifierInfo) == $$valueUnicodeStart); } boolean isUnicodeIdentifierPart(int ch) { int props = getProperties(ch); return ((props & $$maskUnicodePart) != 0); } boolean isIdentifierIgnorable(int ch) { int props = getProperties(ch); return ((props & $$maskIdentifierInfo) == $$valueIgnorable); } int toLowerCase(int ch) { int mapChar = ch; int val = getProperties(ch); if ((val & $$maskLowerCase) != 0) { int offset = val << $$shiftCaseOffsetSign >> ($$shiftCaseOffsetSign+$$shiftCaseOffset); mapChar = ch + offset; } return mapChar; } int toUpperCase(int ch) { int mapChar = ch; int val = getProperties(ch); if ((val & $$maskUpperCase) != 0) { int offset = val << $$shiftCaseOffsetSign >> ($$shiftCaseOffsetSign+$$shiftCaseOffset); mapChar = ch - offset; } return mapChar; } int toTitleCase(int ch) { int mapChar = ch; int val = getProperties(ch); if ((val & $$maskTitleCase) != 0) { // There is a titlecase equivalent. Perform further checks: if ((val & $$maskUpperCase) == 0) { // The character does not have an uppercase equivalent, so it must // already be uppercase; so add 1 to get the titlecase form. mapChar = ch + 1; } else if ((val & $$maskLowerCase) == 0) { // The character does not have a lowercase equivalent, so it must // already be lowercase; so subtract 1 to get the titlecase form. mapChar = ch - 1; } // else { // The character has both an uppercase equivalent and a lowercase // equivalent, so it must itself be a titlecase form; return it. // return ch; //} } else if ((val & $$maskUpperCase) != 0) { // This character has no titlecase equivalent but it does have an // uppercase equivalent, so use that (subtract the signed case offset). mapChar = toUpperCase(ch); } return mapChar; } int digit(int ch, int radix) { int value = -1; if (radix >= Character.MIN_RADIX && radix <= Character.MAX_RADIX) { int val = getProperties(ch); int kind = val & $$maskType; if (kind == Character.DECIMAL_DIGIT_NUMBER) { value = ch + ((val & $$maskDigitOffset) >> $$shiftDigitOffset) & $$maskDigit; } else if ((val & $$maskNumericType) == $$valueJavaSupradecimal) { // Java supradecimal digit value = (ch + ((val & $$maskDigitOffset) >> $$shiftDigitOffset) & $$maskDigit) + 10; } } return (value < radix) ? value : -1; } int getNumericValue(int ch) { int val = getProperties(ch); int retval = -1; switch (val & $$maskNumericType) { default: // cannot occur case ($$valueNotNumeric): // not numeric retval = -1; break; case ($$valueDigit): // simple numeric retval = ch + ((val & $$maskDigitOffset) >> $$shiftDigitOffset) & $$maskDigit; break; case ($$valueStrangeNumeric) : // "strange" numeric retval = -2; break; case ($$valueJavaSupradecimal): // Java supradecimal retval = (ch + ((val & $$maskDigitOffset) >> $$shiftDigitOffset) & $$maskDigit) + 10; break; } return retval; } boolean isDigit(int ch) { int props = getProperties(ch); return (props & $$maskType) == Character.DECIMAL_DIGIT_NUMBER; } boolean isLowerCase(int ch) { int props = getProperties(ch); return (props & $$maskType) == Character.LOWERCASE_LETTER; } boolean isUpperCase(int ch) { int props = getProperties(ch); return (props & $$maskType) == Character.UPPERCASE_LETTER; } boolean isWhitespace(int ch) { int props = getProperties(ch); return ((props & $$maskIdentifierInfo) == $$valueJavaWhitespace); } byte getDirectionality(int ch) { int val = getProperties(ch); byte directionality = (byte)((val & $$maskBidi) >> $$shiftBidi); if (directionality == 0xF ) { directionality = Character.DIRECTIONALITY_UNDEFINED; } return directionality; } boolean isMirrored(int ch) { int props = getProperties(ch); return ((props & $$maskMirrored) != 0); } static final CharacterData instance = new CharacterData0E(); private CharacterData0E() {}; $$Tables static { $$Initializers } }