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Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically
embedded into Java applications to provide scripting to end users.
/* -*- Mode: java; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.javascript.regexp;
import org.mozilla.javascript.BaseFunction;
import org.mozilla.javascript.Context;
import org.mozilla.javascript.ScriptRuntime;
import org.mozilla.javascript.Scriptable;
import org.mozilla.javascript.TopLevel;
import org.mozilla.javascript.Undefined;
/**
* This class implements the RegExp constructor native object.
*
* Revision History:
* Implementation in C by Brendan Eich
* Initial port to Java by Norris Boyd from jsregexp.c version 1.36
* Merged up to version 1.38, which included Unicode support.
* Merged bug fixes in version 1.39.
* Merged JSFUN13_BRANCH changes up to 1.32.2.11
*
* @author Brendan Eich
* @author Norris Boyd
*/
class NativeRegExpCtor extends BaseFunction
{
private static final long serialVersionUID = -5733330028285400526L;
NativeRegExpCtor()
{
}
@Override
public String getFunctionName()
{
return "RegExp";
}
@Override
public int getLength() {
return 2;
}
@Override
public int getArity() {
return 2;
}
@Override
public Object call(Context cx, Scriptable scope, Scriptable thisObj,
Object[] args)
{
if (args.length > 0 && args[0] instanceof NativeRegExp &&
(args.length == 1 || args[1] == Undefined.instance))
{
return args[0];
}
return construct(cx, scope, args);
}
@Override
public Scriptable construct(Context cx, Scriptable scope, Object[] args)
{
NativeRegExp re = new NativeRegExp();
re.compile(cx, scope, args);
ScriptRuntime.setBuiltinProtoAndParent(re, scope, TopLevel.Builtins.RegExp);
return re;
}
private static RegExpImpl getImpl()
{
Context cx = Context.getCurrentContext();
return (RegExpImpl) ScriptRuntime.getRegExpProxy(cx);
}
// #string_id_map#
private static final int
Id_multiline = 1,
Id_STAR = 2, // #string=$*#
Id_input = 3,
Id_UNDERSCORE = 4, // #string=$_#
Id_lastMatch = 5,
Id_AMPERSAND = 6, // #string=$&#
Id_lastParen = 7,
Id_PLUS = 8, // #string=$+#
Id_leftContext = 9,
Id_BACK_QUOTE = 10, // #string=$`#
Id_rightContext = 11,
Id_QUOTE = 12, // #string=$'#
DOLLAR_ID_BASE = 12;
private static final int
Id_DOLLAR_1 = DOLLAR_ID_BASE + 1, // #string=$1#
Id_DOLLAR_2 = DOLLAR_ID_BASE + 2, // #string=$2#
Id_DOLLAR_3 = DOLLAR_ID_BASE + 3, // #string=$3#
Id_DOLLAR_4 = DOLLAR_ID_BASE + 4, // #string=$4#
Id_DOLLAR_5 = DOLLAR_ID_BASE + 5, // #string=$5#
Id_DOLLAR_6 = DOLLAR_ID_BASE + 6, // #string=$6#
Id_DOLLAR_7 = DOLLAR_ID_BASE + 7, // #string=$7#
Id_DOLLAR_8 = DOLLAR_ID_BASE + 8, // #string=$8#
Id_DOLLAR_9 = DOLLAR_ID_BASE + 9, // #string=$9#
MAX_INSTANCE_ID = DOLLAR_ID_BASE + 9;
@Override
protected int getMaxInstanceId()
{
return super.getMaxInstanceId() + MAX_INSTANCE_ID;
}
@Override
protected int findInstanceIdInfo(String s) {
int id;
// #generated# Last update: 2001-05-24 16:09:31 GMT+02:00
L0: { id = 0; String X = null; int c;
L: switch (s.length()) {
case 2: switch (s.charAt(1)) {
case '&': if (s.charAt(0)=='$') {id=Id_AMPERSAND; break L0;} break L;
case '\'': if (s.charAt(0)=='$') {id=Id_QUOTE; break L0;} break L;
case '*': if (s.charAt(0)=='$') {id=Id_STAR; break L0;} break L;
case '+': if (s.charAt(0)=='$') {id=Id_PLUS; break L0;} break L;
case '1': if (s.charAt(0)=='$') {id=Id_DOLLAR_1; break L0;} break L;
case '2': if (s.charAt(0)=='$') {id=Id_DOLLAR_2; break L0;} break L;
case '3': if (s.charAt(0)=='$') {id=Id_DOLLAR_3; break L0;} break L;
case '4': if (s.charAt(0)=='$') {id=Id_DOLLAR_4; break L0;} break L;
case '5': if (s.charAt(0)=='$') {id=Id_DOLLAR_5; break L0;} break L;
case '6': if (s.charAt(0)=='$') {id=Id_DOLLAR_6; break L0;} break L;
case '7': if (s.charAt(0)=='$') {id=Id_DOLLAR_7; break L0;} break L;
case '8': if (s.charAt(0)=='$') {id=Id_DOLLAR_8; break L0;} break L;
case '9': if (s.charAt(0)=='$') {id=Id_DOLLAR_9; break L0;} break L;
case '_': if (s.charAt(0)=='$') {id=Id_UNDERSCORE; break L0;} break L;
case '`': if (s.charAt(0)=='$') {id=Id_BACK_QUOTE; break L0;} break L;
} break L;
case 5: X="input";id=Id_input; break L;
case 9: c=s.charAt(4);
if (c=='M') { X="lastMatch";id=Id_lastMatch; }
else if (c=='P') { X="lastParen";id=Id_lastParen; }
else if (c=='i') { X="multiline";id=Id_multiline; }
break L;
case 11: X="leftContext";id=Id_leftContext; break L;
case 12: X="rightContext";id=Id_rightContext; break L;
}
if (X!=null && X!=s && !X.equals(s)) id = 0;
}
// #/generated#
if (id == 0) return super.findInstanceIdInfo(s);
int attr;
switch (id) {
case Id_multiline:
attr = multilineAttr;
break;
case Id_STAR:
attr = starAttr;
break;
case Id_input:
attr = inputAttr;
break;
case Id_UNDERSCORE:
attr = underscoreAttr;
break;
default:
attr = PERMANENT | READONLY;
break;
}
return instanceIdInfo(attr, super.getMaxInstanceId() + id);
}
// #/string_id_map#
@Override
protected String getInstanceIdName(int id)
{
int shifted = id - super.getMaxInstanceId();
if (1 <= shifted && shifted <= MAX_INSTANCE_ID) {
switch (shifted) {
case Id_multiline: return "multiline";
case Id_STAR: return "$*";
case Id_input: return "input";
case Id_UNDERSCORE: return "$_";
case Id_lastMatch: return "lastMatch";
case Id_AMPERSAND: return "$&";
case Id_lastParen: return "lastParen";
case Id_PLUS: return "$+";
case Id_leftContext: return "leftContext";
case Id_BACK_QUOTE: return "$`";
case Id_rightContext: return "rightContext";
case Id_QUOTE: return "$'";
}
// Must be one of $1..$9, convert to 0..8
int substring_number = shifted - DOLLAR_ID_BASE - 1;
char[] buf = { '$', (char)('1' + substring_number) };
return new String(buf);
}
return super.getInstanceIdName(id);
}
@Override
protected Object getInstanceIdValue(int id)
{
int shifted = id - super.getMaxInstanceId();
if (1 <= shifted && shifted <= MAX_INSTANCE_ID) {
RegExpImpl impl = getImpl();
Object stringResult;
switch (shifted) {
case Id_multiline:
case Id_STAR:
return ScriptRuntime.wrapBoolean(impl.multiline);
case Id_input:
case Id_UNDERSCORE:
stringResult = impl.input;
break;
case Id_lastMatch:
case Id_AMPERSAND:
stringResult = impl.lastMatch;
break;
case Id_lastParen:
case Id_PLUS:
stringResult = impl.lastParen;
break;
case Id_leftContext:
case Id_BACK_QUOTE:
stringResult = impl.leftContext;
break;
case Id_rightContext:
case Id_QUOTE:
stringResult = impl.rightContext;
break;
default:
{
// Must be one of $1..$9, convert to 0..8
int substring_number = shifted - DOLLAR_ID_BASE - 1;
stringResult = impl.getParenSubString(substring_number);
break;
}
}
return (stringResult == null) ? "" : stringResult.toString();
}
return super.getInstanceIdValue(id);
}
@Override
protected void setInstanceIdValue(int id, Object value)
{
int shifted = id - super.getMaxInstanceId();
switch (shifted) {
case Id_multiline:
case Id_STAR:
getImpl().multiline = ScriptRuntime.toBoolean(value);
return;
case Id_input:
case Id_UNDERSCORE:
getImpl().input = ScriptRuntime.toString(value);
return;
case Id_lastMatch:
case Id_AMPERSAND:
case Id_lastParen:
case Id_PLUS:
case Id_leftContext:
case Id_BACK_QUOTE:
case Id_rightContext:
case Id_QUOTE:
return;
default:
int substring_number = shifted - DOLLAR_ID_BASE - 1;
if (0 <= substring_number && substring_number <= 8) {
return;
}
}
super.setInstanceIdValue(id, value);
}
@Override
protected void setInstanceIdAttributes(int id, int attr) {
int shifted = id - super.getMaxInstanceId();
switch (shifted) {
case Id_multiline:
multilineAttr = attr;
return;
case Id_STAR:
starAttr = attr;
return;
case Id_input:
inputAttr = attr;
return;
case Id_UNDERSCORE:
underscoreAttr = attr;
return;
case Id_lastMatch:
case Id_AMPERSAND:
case Id_lastParen:
case Id_PLUS:
case Id_leftContext:
case Id_BACK_QUOTE:
case Id_rightContext:
case Id_QUOTE:
// non-configurable + non-writable
return;
default:
int substring_number = shifted - DOLLAR_ID_BASE - 1;
if (0 <= substring_number && substring_number <= 8) {
// non-configurable + non-writable
return;
}
}
super.setInstanceIdAttributes(id, attr);
}
private int multilineAttr = PERMANENT;
private int starAttr = PERMANENT;
private int inputAttr = PERMANENT;
private int underscoreAttr = PERMANENT;
}
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