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378 lines
11 KiB
378 lines
11 KiB
/*
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* This file is part of the KDE libraries
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* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
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* Copyright (C) 2003 Apple Computer, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <stdio.h>
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#include "value.h"
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#include "object.h"
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#include "types.h"
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#include "interpreter.h"
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#include "operations.h"
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#include "internal.h"
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#include "regexp.h"
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#include "regexp_object.h"
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#include "error_object.h"
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#include "lookup.h"
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using namespace KJS;
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// ------------------------------ RegExpPrototypeImp ---------------------------
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// ECMA 15.9.4
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const ClassInfo RegExpPrototypeImp::info = {"RegExp", 0, 0, 0};
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RegExpPrototypeImp::RegExpPrototypeImp(ExecState *exec,
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ObjectPrototypeImp *objProto,
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FunctionPrototypeImp *funcProto)
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: ObjectImp(objProto)
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{
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Value protect(this);
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setInternalValue(String(""));
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// The constructor will be added later in RegExpObject's constructor (?)
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static const Identifier execPropertyName("exec");
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putDirect(execPropertyName,
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new RegExpProtoFuncImp(exec,funcProto,RegExpProtoFuncImp::Exec, 0, execPropertyName), DontEnum);
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static const Identifier testPropertyName("test");
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putDirect(testPropertyName,
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new RegExpProtoFuncImp(exec,funcProto,RegExpProtoFuncImp::Test, 0, testPropertyName), DontEnum);
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putDirect(toStringPropertyName,
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new RegExpProtoFuncImp(exec,funcProto,RegExpProtoFuncImp::ToString, 0, toStringPropertyName), DontEnum);
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static const Identifier compilePropertyName("compile");
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putDirect(compilePropertyName,
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new RegExpProtoFuncImp(exec,funcProto,RegExpProtoFuncImp::Compile, 1, compilePropertyName), DontEnum);
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}
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// ------------------------------ RegExpProtoFuncImp ---------------------------
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RegExpProtoFuncImp::RegExpProtoFuncImp(ExecState * /*exec*/, FunctionPrototypeImp *funcProto,
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int i, int len, const Identifier &_ident)
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: InternalFunctionImp(funcProto), id(i)
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{
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Value protect(this);
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putDirect(lengthPropertyName, len, DontDelete|ReadOnly|DontEnum);
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ident = _ident;
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}
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bool RegExpProtoFuncImp::implementsCall() const
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{
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return true;
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}
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Value RegExpProtoFuncImp::call(ExecState *exec, Object &thisObj, const List &args)
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{
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if (!thisObj.inherits(&RegExpImp::info)) {
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if (thisObj.inherits(&RegExpPrototypeImp::info)) {
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switch (id) {
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case ToString: return String("//"); // FireFox returns /(?:)/
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}
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}
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Object err = Error::create(exec,TypeError);
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exec->setException(err);
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return err;
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}
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RegExpImp *reimp = static_cast<RegExpImp*>(thisObj.imp());
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RegExp *re = reimp->regExp();
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String s;
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UString str;
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switch (id) {
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case Exec: // 15.10.6.2
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case Test:
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{
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s = args[0].toString(exec);
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int length = s.value().size();
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// Get values from the last time (in case of /g)
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Value lastIndex = thisObj.get(exec,"lastIndex");
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int i = lastIndex.isValid() ? lastIndex.toInt32(exec) : 0;
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bool globalFlag = thisObj.get(exec,"global").toBoolean(exec);
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if (!globalFlag)
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i = 0;
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if (i < 0 || i > length) {
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thisObj.put(exec,"lastIndex", Number(0), DontDelete | DontEnum);
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if (id == Test)
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return Boolean(false);
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else
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return Null();
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}
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RegExpObjectImp* regExpObj = static_cast<RegExpObjectImp*>(exec->lexicalInterpreter()->builtinRegExp().imp());
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int **ovector = regExpObj->registerRegexp( re, s.value() );
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re->prepareMatch(s.value());
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str = re->match(s.value(), i, 0L, ovector);
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re->doneMatch();
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regExpObj->setSubPatterns(re->subPatterns());
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if (id == Test)
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return Boolean(!str.isNull());
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if (str.isNull()) // no match
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{
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if (globalFlag)
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thisObj.put(exec,"lastIndex",Number(0), DontDelete | DontEnum);
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return Null();
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}
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else // success
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{
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if (globalFlag)
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thisObj.put(exec,"lastIndex",Number( (*ovector)[1] ), DontDelete | DontEnum);
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return regExpObj->arrayOfMatches(exec,str);
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}
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}
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break;
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case ToString:
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s = thisObj.get(exec,"source").toString(exec);
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str = "/";
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str += s.value();
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str += "/";
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if (thisObj.get(exec,"global").toBoolean(exec)) {
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str += "g";
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}
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if (thisObj.get(exec,"ignoreCase").toBoolean(exec)) {
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str += "i";
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}
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if (thisObj.get(exec,"multiline").toBoolean(exec)) {
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str += "m";
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}
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return String(str);
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case Compile: {
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RegExp* newEngine = RegExpObjectImp::makeEngine(exec, args[0].toString(exec), args[1]);
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if (!newEngine)
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return exec->exception();
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reimp->setRegExp(newEngine);
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return Value(reimp);
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}
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}
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return Undefined();
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}
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// ------------------------------ RegExpImp ------------------------------------
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const ClassInfo RegExpImp::info = {"RegExp", 0, 0, 0};
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RegExpImp::RegExpImp(RegExpPrototypeImp *regexpProto)
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: ObjectImp(regexpProto), reg(0L)
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{
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}
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RegExpImp::~RegExpImp()
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{
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delete reg;
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}
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void RegExpImp::setRegExp(RegExp *r)
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{
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delete reg;
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reg = r;
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Object protect(this);//Protect self from GC (we are allocating a StringImp, and may be new)
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putDirect("global", (r->flags() & RegExp::Global) ? BooleanImp::staticTrue : BooleanImp::staticFalse,
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DontDelete | ReadOnly | DontEnum);
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putDirect("ignoreCase", (r->flags() & RegExp::IgnoreCase) ? BooleanImp::staticTrue : BooleanImp::staticFalse,
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DontDelete | ReadOnly | DontEnum);
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putDirect("multiline", (r->flags() & RegExp::Multiline) ? BooleanImp::staticTrue : BooleanImp::staticFalse,
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DontDelete | ReadOnly | DontEnum);
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putDirect("source", new StringImp(r->pattern()), DontDelete | ReadOnly | DontEnum);
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putDirect("lastIndex", NumberImp::zero(), DontDelete | DontEnum);
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}
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// ------------------------------ RegExpObjectImp ------------------------------
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RegExpObjectImp::RegExpObjectImp(ExecState * /*exec*/,
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FunctionPrototypeImp *funcProto,
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RegExpPrototypeImp *regProto)
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: InternalFunctionImp(funcProto), lastOvector(0L), lastNrSubPatterns(0)
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{
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Value protect(this);
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// ECMA 15.10.5.1 RegExp.prototype
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putDirect(prototypePropertyName, regProto, DontEnum|DontDelete|ReadOnly);
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// no. of arguments for constructor
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putDirect(lengthPropertyName, NumberImp::two(), ReadOnly|DontDelete|DontEnum);
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}
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RegExpObjectImp::~RegExpObjectImp()
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{
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delete [] lastOvector;
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}
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int **RegExpObjectImp::registerRegexp( const RegExp* re, const UString& s )
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{
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lastString = s;
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delete [] lastOvector;
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lastOvector = 0;
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lastNrSubPatterns = re->subPatterns();
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return &lastOvector;
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}
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Object RegExpObjectImp::arrayOfMatches(ExecState *exec, const UString &result) const
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{
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List list;
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// The returned array contains 'result' as first item, followed by the list of matches
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list.append(String(result));
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if ( lastOvector )
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for ( unsigned int i = 1 ; i < lastNrSubPatterns + 1 ; ++i )
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{
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UString substring = lastString.substr( lastOvector[2*i], lastOvector[2*i+1] - lastOvector[2*i] );
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list.append(String(substring));
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}
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Object arr = exec->lexicalInterpreter()->builtinArray().construct(exec, list);
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arr.put(exec, "index", Number(lastOvector[0]));
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arr.put(exec, "input", String(lastString));
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return arr;
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}
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Value RegExpObjectImp::get(ExecState *exec, const Identifier &p) const
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{
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UString s = p.ustring();
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if (s[0] == '$' && lastOvector)
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{
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bool ok;
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unsigned long i = s.substr(1).toULong(&ok);
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if (ok)
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{
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if (i < lastNrSubPatterns + 1)
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{
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UString substring = lastString.substr( lastOvector[2*i], lastOvector[2*i+1] - lastOvector[2*i] );
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return String(substring);
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}
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return String("");
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}
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}
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return InternalFunctionImp::get(exec, p);
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}
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bool RegExpObjectImp::hasProperty(ExecState *exec, const Identifier &p) const
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{
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UString s = p.ustring();
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if (s[0] == '$' && lastOvector) {
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bool ok;
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(void)s.substr(1).toULong(&ok);
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if (ok)
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return true;
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}
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return InternalFunctionImp::hasProperty(exec, p);
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}
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bool RegExpObjectImp::implementsConstruct() const
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{
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return true;
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}
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RegExp* RegExpObjectImp::makeEngine(ExecState *exec, const UString &p, const Value &flagsInput)
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{
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UString flags = flagsInput.type() == UndefinedType ? UString("") : flagsInput.toString(exec);
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// Check for validity of flags
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for (int pos = 0; pos < flags.size(); ++pos) {
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switch (flags[pos].unicode()) {
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case 'g':
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case 'i':
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case 'm':
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break;
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default: {
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Object err = Error::create(exec, SyntaxError,
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"Invalid regular expression flags");
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exec->setException(err);
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return 0;
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}
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}
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}
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bool global = (flags.find("g") >= 0);
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bool ignoreCase = (flags.find("i") >= 0);
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bool multiline = (flags.find("m") >= 0);
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int reflags = RegExp::None;
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if (global)
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reflags |= RegExp::Global;
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if (ignoreCase)
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reflags |= RegExp::IgnoreCase;
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if (multiline)
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reflags |= RegExp::Multiline;
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RegExp *re = new RegExp(p, reflags);
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if (!re->isValid()) {
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Object err = Error::create(exec, SyntaxError,
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"Invalid regular expression");
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exec->setException(err);
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delete re;
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return 0;
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}
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return re;
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}
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// ECMA 15.10.4
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Object RegExpObjectImp::construct(ExecState *exec, const List &args)
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{
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UString p;
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if (args.isEmpty()) {
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p = "";
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} else {
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Value a0 = args[0];
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if (a0.isA(ObjectType) && a0.toObject(exec).inherits(&RegExpImp::info)) {
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// It's a regexp. Check that no flags were passed.
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if (args.size() > 1 && args[1].type() != UndefinedType) {
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Object err = Error::create(exec,TypeError);
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exec->setException(err);
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return err;
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}
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RegExpImp *rimp = static_cast<RegExpImp*>(Object::dynamicCast(a0).imp());
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p = rimp->regExp()->pattern();
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} else {
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p = a0.toString(exec);
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}
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}
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RegExp* re = makeEngine(exec, p, args[1]);
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if (!re)
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return exec->exception().toObject(exec);
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RegExpPrototypeImp *proto = static_cast<RegExpPrototypeImp*>(exec->lexicalInterpreter()->builtinRegExpPrototype().imp());
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RegExpImp *dat = new RegExpImp(proto);
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Object obj(dat); // protect from GC
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dat->setRegExp(re);
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return obj;
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}
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bool RegExpObjectImp::implementsCall() const
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{
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return true;
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}
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// ECMA 15.10.3
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Value RegExpObjectImp::call(ExecState *exec, Object &/*thisObj*/,
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const List &args)
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{
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// TODO: handle RegExp argument case (15.10.3.1)
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return construct(exec, args);
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}
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