jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/runtime/regexp/JoniRegExp.java@52348a92adca (annotated)

src/jdk/nashorn/internal/runtime/regexp/JoniRegExp.java@52348a92adca (annotated)

src/jdk/nashorn/internal/runtime/regexp/JoniRegExp.java

Sat, 09 Nov 2019 20:29:44 +0800

author: aoqi
date: Sat, 09 Nov 2019 20:29:44 +0800
changeset 2511: 52348a92adca
parent 1205: 4112748288bb
parent 2510: fba077f48da2
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 2010, 2019, 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 jdk.nashorn.internal.runtime.regexp;
 import java.util.regex.Pattern;
 import java.util.regex.PatternSyntaxException;
 import jdk.nashorn.internal.runtime.ParserException;
 import jdk.nashorn.internal.runtime.regexp.joni.Matcher;
 import jdk.nashorn.internal.runtime.regexp.joni.Option;
 import jdk.nashorn.internal.runtime.regexp.joni.Regex;
 import jdk.nashorn.internal.runtime.regexp.joni.Region;
 import jdk.nashorn.internal.runtime.regexp.joni.Syntax;
 import jdk.nashorn.internal.runtime.regexp.joni.exception.JOniException;
 /**
  * Regular expression implementation based on the Joni engine from the JRuby project.
  */
 public class JoniRegExp extends RegExp {
     /** Compiled Joni Regex */
     private Regex regex;
     /**
      * Construct a Regular expression from the given {@code pattern} and {@code flags} strings.
      *
      * @param pattern RegExp pattern string
      * @param flags RegExp flag string
      * @throws ParserException if flags is invalid or pattern string has syntax error.
      */
     public JoniRegExp(final String pattern, final String flags) throws ParserException {
         super(pattern, flags);
         int option = Option.SINGLELINE;
         if (this.isIgnoreCase()) {
             option |= Option.IGNORECASE;
         }
         if (this.isMultiline()) {
             option &= ~Option.SINGLELINE;
             option |= Option.NEGATE_SINGLELINE;
         }
         try {
             RegExpScanner parsed;
             try {
                 parsed = RegExpScanner.scan(pattern);
             } catch (final PatternSyntaxException e) {
                 // refine the exception with a better syntax error, if this
                 // passes, just rethrow what we have
                 Pattern.compile(pattern, 0);
                 throw e;
             }
             if (parsed != null) {
                 final char[] javaPattern = parsed.getJavaPattern().toCharArray();
                 this.regex = new Regex(javaPattern, 0, javaPattern.length, option, Syntax.JAVASCRIPT);
                 this.groupsInNegativeLookahead = parsed.getGroupsInNegativeLookahead();
             }
         } catch (final PatternSyntaxException | JOniException e2) {
             throwParserException("syntax", e2.getMessage());
         } catch (StackOverflowError e3) {
             throw new RuntimeException(e3);
         }
     }
     @Override
     public RegExpMatcher match(final String input) {
         if (regex == null) {
             return null;
         }
         return new JoniMatcher(input);
     }
     /**
      * RegExp Factory class for Joni regexp engine.
      */
     public static class Factory extends RegExpFactory {
         @Override
         public RegExp compile(final String pattern, final String flags) throws ParserException {
             return new JoniRegExp(pattern, flags);
         }
     }
     class JoniMatcher implements RegExpMatcher {
         final String input;
         final Matcher joniMatcher;
         JoniMatcher(final String input) {
             this.input = input;
             this.joniMatcher = regex.matcher(input.toCharArray());
         }
         @Override
         public boolean search(final int start) {
             return joniMatcher.search(start, input.length(), Option.NONE) > -1;
         }
         @Override
         public String getInput() {
             return input;
         }
         @Override
         public int start() {
             return joniMatcher.getBegin();
         }
         @Override
         public int start(final int group) {
             return group == 0 ? start() : joniMatcher.getRegion().beg[group];
         }
         @Override
         public int end() {
             return joniMatcher.getEnd();
         }
         @Override
         public int end(final int group) {
             return group == 0 ? end() : joniMatcher.getRegion().end[group];
         }
         @Override
         public String group() {
             return input.substring(joniMatcher.getBegin(), joniMatcher.getEnd());
         }
         @Override
         public String group(final int group) {
             if (group == 0) {
                 return group();
             }
             final Region region = joniMatcher.getRegion();
             return input.substring(region.beg[group], region.end[group]);
         }
         @Override
         public int groupCount() {
             final Region region = joniMatcher.getRegion();
             return region == null ? 0 : region.numRegs - 1;
         }
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/internal/runtime/regexp/JoniRegExp.java@52348a92adca (annotated)

src/jdk/nashorn/internal/runtime/regexp/JoniRegExp.java