1.1 --- a/src/jdk/nashorn/internal/runtime/RegExp.java Fri Feb 22 10:39:00 2013 -0400
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,177 +0,0 @@
1.4 -/*
1.5 - * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 - *
1.8 - * This code is free software; you can redistribute it and/or modify it
1.9 - * under the terms of the GNU General Public License version 2 only, as
1.10 - * published by the Free Software Foundation. Oracle designates this
1.11 - * particular file as subject to the "Classpath" exception as provided
1.12 - * by Oracle in the LICENSE file that accompanied this code.
1.13 - *
1.14 - * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 - * version 2 for more details (a copy is included in the LICENSE file that
1.18 - * accompanied this code).
1.19 - *
1.20 - * You should have received a copy of the GNU General Public License version
1.21 - * 2 along with this work; if not, write to the Free Software Foundation,
1.22 - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 - *
1.24 - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 - * or visit www.oracle.com if you need additional information or have any
1.26 - * questions.
1.27 - */
1.28 -
1.29 -package jdk.nashorn.internal.runtime;
1.30 -
1.31 -import static java.util.regex.Pattern.CASE_INSENSITIVE;
1.32 -import static java.util.regex.Pattern.MULTILINE;
1.33 -import static java.util.regex.Pattern.UNICODE_CASE;
1.34 -
1.35 -import java.util.HashSet;
1.36 -import java.util.regex.Pattern;
1.37 -import java.util.regex.PatternSyntaxException;
1.38 -
1.39 -/**
1.40 - * This class is used to represent a parsed regular expression. Accepts input
1.41 - * pattern string and flagString. This is used by AbstractParser to validate
1.42 - * RegExp literals as well as by NativeRegExp to parse RegExp constructor arguments.
1.43 - */
1.44 -public final class RegExp {
1.45 - /** Pattern string. */
1.46 - private final String input;
1.47 -
1.48 - /** Global search flag for this regexp.*/
1.49 - private boolean global;
1.50 -
1.51 - /** Case insensitive flag for this regexp */
1.52 - private boolean ignoreCase;
1.53 -
1.54 - /** Multi-line flag for this regexp */
1.55 - private boolean multiline;
1.56 -
1.57 - /** Java regexp pattern to use for match. We compile to one of these */
1.58 - private Pattern pattern;
1.59 -
1.60 - /** BitVector that keeps track of groups in negative lookahead */
1.61 - private BitVector groupsInNegativeLookahead;
1.62 -
1.63 - /**
1.64 - * Creates RegExpLiteral object from given input and flagString.
1.65 - *
1.66 - * @param input RegExp pattern string
1.67 - * @param flagString RegExp flags
1.68 - * @throws ParserException if flagString is invalid or input string has syntax error.
1.69 - */
1.70 - public RegExp(final String input, final String flagString) throws ParserException {
1.71 - this.input = input;
1.72 - final HashSet<Character> usedFlags = new HashSet<>();
1.73 - int flags = 0;
1.74 -
1.75 - for (final char ch : flagString.toCharArray()) {
1.76 - if (usedFlags.contains(ch)) {
1.77 - throwParserException("repeated.flag", Character.toString(ch));
1.78 - }
1.79 -
1.80 - switch (ch) {
1.81 - case 'g':
1.82 - this.global = true;
1.83 - usedFlags.add(ch);
1.84 - break;
1.85 - case 'i':
1.86 - this.ignoreCase = true;
1.87 - flags |= CASE_INSENSITIVE | UNICODE_CASE;
1.88 - usedFlags.add(ch);
1.89 - break;
1.90 - case 'm':
1.91 - this.multiline = true;
1.92 - flags |= MULTILINE;
1.93 - usedFlags.add(ch);
1.94 - break;
1.95 - default:
1.96 - throwParserException("unsupported.flag", Character.toString(ch));
1.97 - }
1.98 - }
1.99 -
1.100 - try {
1.101 - RegExpScanner parsed;
1.102 -
1.103 - try {
1.104 - parsed = RegExpScanner.scan(input);
1.105 - } catch (final PatternSyntaxException e) {
1.106 - // refine the exception with a better syntax error, if this
1.107 - // passes, just rethrow what we have
1.108 - Pattern.compile(input, flags);
1.109 - throw e;
1.110 - }
1.111 -
1.112 - if (parsed != null) {
1.113 - this.pattern = Pattern.compile(parsed.getJavaPattern(), flags);
1.114 - this.groupsInNegativeLookahead = parsed.getGroupsInNegativeLookahead();
1.115 - }
1.116 - } catch (final PatternSyntaxException e2) {
1.117 - throwParserException("syntax", e2.getMessage());
1.118 - }
1.119 -
1.120 - }
1.121 -
1.122 - /**
1.123 - * @return the input
1.124 - */
1.125 - public String getInput() {
1.126 - return input;
1.127 - }
1.128 -
1.129 - /**
1.130 - * @return the global
1.131 - */
1.132 - public boolean isGlobal() {
1.133 - return global;
1.134 - }
1.135 -
1.136 - /**
1.137 - * @return the ignoreCase
1.138 - */
1.139 - public boolean isIgnoreCase() {
1.140 - return ignoreCase;
1.141 - }
1.142 -
1.143 - /**
1.144 - * @return the multiline
1.145 - */
1.146 - public boolean isMultiline() {
1.147 - return multiline;
1.148 - }
1.149 -
1.150 - /**
1.151 - * @return the pattern
1.152 - */
1.153 - public Pattern getPattern() {
1.154 - return pattern;
1.155 - }
1.156 -
1.157 - /**
1.158 - * @return the groupsInNegativeLookahead
1.159 - */
1.160 - public BitVector getGroupsInNegativeLookahead() {
1.161 - return groupsInNegativeLookahead;
1.162 - }
1.163 -
1.164 - /**
1.165 - * Validation method for RegExp input and flagString - we don't care about the RegExp object
1.166 - *
1.167 - * @param input regexp input
1.168 - * @param flagString flag string
1.169 - *
1.170 - * @throws ParserException if invalid regexp and flags
1.171 - */
1.172 - @SuppressWarnings({"unused", "ResultOfObjectAllocationIgnored"})
1.173 - public static void validate(final String input, final String flagString) throws ParserException {
1.174 - new RegExp(input, flagString);
1.175 - }
1.176 -
1.177 - private static void throwParserException(final String key, final String str) throws ParserException {
1.178 - throw new ParserException(ECMAErrors.getMessage("parser.error.regex." + key, str));
1.179 - }
1.180 -}
