org.mozilla.javascript.regexp.NativeRegExpCtor Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of rhino Show documentation
Show all versions of rhino Show documentation
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.
Full jar including tools, excluding the JSR-223 Script Engine wrapper.
/* -*- 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;
}