297 lines
11 KiB
Plaintext
297 lines
11 KiB
Plaintext
/*
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* Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.lang;
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import jdk.internal.HotSpotIntrinsicCandidate;
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/** The CharacterData class encapsulates the large tables found in
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Java.lang.Character. */
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class CharacterDataLatin1 extends CharacterData {
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/* The character properties are currently encoded into 32 bits in the following manner:
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1 bit mirrored property
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4 bits directionality property
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9 bits signed offset used for converting case
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1 bit if 1, adding the signed offset converts the character to lowercase
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1 bit if 1, subtracting the signed offset converts the character to uppercase
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1 bit if 1, this character has a titlecase equivalent (possibly itself)
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3 bits 0 may not be part of an identifier
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1 ignorable control; may continue a Unicode identifier or Java identifier
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2 may continue a Java identifier but not a Unicode identifier (unused)
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3 may continue a Unicode identifier or Java identifier
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4 is a Java whitespace character
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5 may start or continue a Java identifier;
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may continue but not start a Unicode identifier (underscores)
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6 may start or continue a Java identifier but not a Unicode identifier ($)
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7 may start or continue a Unicode identifier or Java identifier
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Thus:
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5, 6, 7 may start a Java identifier
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1, 2, 3, 5, 6, 7 may continue a Java identifier
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7 may start a Unicode identifier
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1, 3, 5, 7 may continue a Unicode identifier
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1 is ignorable within an identifier
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4 is Java whitespace
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2 bits 0 this character has no numeric property
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1 adding the digit offset to the character code and then
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masking with 0x1F will produce the desired numeric value
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2 this character has a "strange" numeric value
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3 a Java supradecimal digit: adding the digit offset to the
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character code, then masking with 0x1F, then adding 10
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will produce the desired numeric value
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5 bits digit offset
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5 bits character type
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The encoding of character properties is subject to change at any time.
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*/
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int getProperties(int ch) {
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char offset = (char)ch;
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int props = $$Lookup(offset);
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return props;
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}
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int getPropertiesEx(int ch) {
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char offset = (char)ch;
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int props = $$LookupEx(offset);
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return props;
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}
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@HotSpotIntrinsicCandidate
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boolean isDigit(int ch) {
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return '0' <= ch && ch <= '9';
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}
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@HotSpotIntrinsicCandidate
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boolean isLowerCase(int ch) {
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int props = getProperties(ch);
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return (props & $$maskType) == Character.LOWERCASE_LETTER;
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}
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@HotSpotIntrinsicCandidate
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boolean isUpperCase(int ch) {
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int props = getProperties(ch);
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return (props & $$maskType) == Character.UPPERCASE_LETTER;
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}
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boolean isOtherLowercase(int ch) {
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int props = getPropertiesEx(ch);
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return (props & $$maskOtherLowercase) != 0;
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}
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boolean isOtherUppercase(int ch) {
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int props = getPropertiesEx(ch);
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return (props & $$maskOtherUppercase) != 0;
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}
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boolean isOtherAlphabetic(int ch) {
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int props = getPropertiesEx(ch);
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return (props & $$maskOtherAlphabetic) != 0;
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}
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boolean isIdeographic(int ch) {
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int props = getPropertiesEx(ch);
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return (props & $$maskIdeographic) != 0;
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}
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int getType(int ch) {
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int props = getProperties(ch);
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return (props & $$maskType);
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}
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boolean isJavaIdentifierStart(int ch) {
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int props = getProperties(ch);
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return ((props & $$maskIdentifierInfo) >= $$lowJavaStart);
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}
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boolean isJavaIdentifierPart(int ch) {
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int props = getProperties(ch);
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return ((props & $$nonzeroJavaPart) != 0);
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}
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boolean isUnicodeIdentifierStart(int ch) {
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int props = getProperties(ch);
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return ((props & $$maskIdentifierInfo) == $$valueUnicodeStart);
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}
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boolean isUnicodeIdentifierPart(int ch) {
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int props = getProperties(ch);
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return ((props & $$maskUnicodePart) != 0);
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}
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boolean isIdentifierIgnorable(int ch) {
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int props = getProperties(ch);
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return ((props & $$maskIdentifierInfo) == $$valueIgnorable);
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}
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int toLowerCase(int ch) {
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int mapChar = ch;
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int val = getProperties(ch);
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if (((val & $$maskLowerCase) != 0) &&
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((val & $$maskCaseOffset) != $$maskCaseOffset)) {
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int offset = val << $$shiftCaseOffsetSign >> ($$shiftCaseOffsetSign+$$shiftCaseOffset);
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mapChar = ch + offset;
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}
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return mapChar;
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}
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int toUpperCase(int ch) {
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int mapChar = ch;
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int val = getProperties(ch);
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if ((val & $$maskUpperCase) != 0) {
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if ((val & $$maskCaseOffset) != $$maskCaseOffset) {
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int offset = val << $$shiftCaseOffsetSign >> ($$shiftCaseOffsetSign+$$shiftCaseOffset);
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mapChar = ch - offset;
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} else if (ch == 0x00B5) {
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mapChar = 0x039C;
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}
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}
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return mapChar;
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}
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int toTitleCase(int ch) {
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return toUpperCase(ch);
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}
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// Digit values for codePoints in the 0-255 range. Contents generated using:
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// for (char i = 0; i < 256; i++) {
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// int v = -1;
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// if (i >= '0' && i <= '9') { v = i - '0'; }
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// else if (i >= 'A' && i <= 'Z') { v = i - 'A' + 10; }
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// else if (i >= 'a' && i <= 'z') { v = i - 'a' + 10; }
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// if (i % 20 == 0) System.out.println();
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// System.out.printf("%2d, ", v);
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// }
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//
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// Analysis has shown that generating the whole array allows the JIT to generate
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// better code compared to a slimmed down array, such as one cutting off after 'z'
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private static final byte[] DIGITS = new byte[] {
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1,
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-1, -1, -1, -1, -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
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25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1, -1, 10, 11, 12,
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13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
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33, 34, 35, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 };
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int digit(int ch, int radix) {
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int value = DIGITS[ch];
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return (value >= 0 && value < radix && radix >= Character.MIN_RADIX
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&& radix <= Character.MAX_RADIX) ? value : -1;
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}
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int getNumericValue(int ch) {
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int val = getProperties(ch);
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int retval = -1;
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switch (val & $$maskNumericType) {
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default: // cannot occur
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case ($$valueNotNumeric): // not numeric
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retval = -1;
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break;
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case ($$valueDigit): // simple numeric
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retval = ch + ((val & $$maskDigitOffset) >> $$shiftDigitOffset) & $$maskDigit;
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break;
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case ($$valueStrangeNumeric) : // "strange" numeric
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retval = -2;
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break;
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case ($$valueJavaSupradecimal): // Java supradecimal
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retval = (ch + ((val & $$maskDigitOffset) >> $$shiftDigitOffset) & $$maskDigit) + 10;
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break;
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}
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return retval;
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}
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@HotSpotIntrinsicCandidate
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boolean isWhitespace(int ch) {
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int props = getProperties(ch);
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return ((props & $$maskIdentifierInfo) == $$valueJavaWhitespace);
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}
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byte getDirectionality(int ch) {
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int val = getProperties(ch);
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byte directionality = (byte)((val & $$maskBidi) >> $$shiftBidi);
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if (directionality == 0xF ) {
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directionality = -1;
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}
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return directionality;
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}
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boolean isMirrored(int ch) {
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int props = getProperties(ch);
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return ((props & $$maskMirrored) != 0);
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}
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int toUpperCaseEx(int ch) {
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int mapChar = ch;
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int val = getProperties(ch);
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if ((val & $$maskUpperCase) != 0) {
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if ((val & $$maskCaseOffset) != $$maskCaseOffset) {
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int offset = val << $$shiftCaseOffsetSign >> ($$shiftCaseOffsetSign+$$shiftCaseOffset);
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mapChar = ch - offset;
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}
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else {
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switch(ch) {
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// map overflow characters
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case 0x00B5 : mapChar = 0x039C; break;
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default : mapChar = Character.ERROR; break;
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}
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}
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}
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return mapChar;
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}
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static char[] sharpsMap = new char[] {'S', 'S'};
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char[] toUpperCaseCharArray(int ch) {
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char[] upperMap = {(char)ch};
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if (ch == 0x00DF) {
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upperMap = sharpsMap;
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}
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return upperMap;
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}
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static final CharacterDataLatin1 instance = new CharacterDataLatin1();
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private CharacterDataLatin1() {};
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$$Tables
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static {
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$$Initializers
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}
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}
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