Show regexp_object.cpp syntax highlighted
// -*- c-basic-offset: 2 -*-
/*
* This file is part of the KDE libraries
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2003 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include "value.h"
#include "object.h"
#include "types.h"
#include "interpreter.h"
#include "operations.h"
#include "internal.h"
#include "regexp.h"
#include "regexp_object.h"
#include "error_object.h"
using namespace KJS;
// ------------------------------ RegExpPrototypeImp ---------------------------
// ECMA 15.9.4
const ClassInfo RegExpPrototypeImp::info = {"RegExpPrototype", 0, 0, 0};
RegExpPrototypeImp::RegExpPrototypeImp(ExecState *exec,
ObjectPrototypeImp *objProto,
FunctionPrototypeImp *funcProto)
: ObjectImp(objProto)
{
Value protect(this);
setInternalValue(String(""));
// The constructor will be added later in RegExpObject's constructor (?)
static const Identifier execPropertyName("exec");
putDirect(execPropertyName, new RegExpProtoFuncImp(exec,funcProto,RegExpProtoFuncImp::Exec, 0), DontEnum);
static const Identifier testPropertyName("test");
putDirect(testPropertyName, new RegExpProtoFuncImp(exec,funcProto,RegExpProtoFuncImp::Test, 0), DontEnum);
putDirect(toStringPropertyName, new RegExpProtoFuncImp(exec,funcProto,RegExpProtoFuncImp::ToString, 0), DontEnum);
}
// ------------------------------ RegExpProtoFuncImp ---------------------------
RegExpProtoFuncImp::RegExpProtoFuncImp(ExecState *exec,
FunctionPrototypeImp *funcProto, int i, int len)
: InternalFunctionImp(funcProto), id(i)
{
Value protect(this);
putDirect(lengthPropertyName, len, DontDelete|ReadOnly|DontEnum);
}
bool RegExpProtoFuncImp::implementsCall() const
{
return true;
}
Value RegExpProtoFuncImp::call(ExecState *exec, Object &thisObj, const List &args)
{
if (!thisObj.inherits(&RegExpImp::info)) {
if (thisObj.inherits(&RegExpPrototypeImp::info)) {
switch (id) {
case ToString: return String("//");
}
}
Object err = Error::create(exec,TypeError);
exec->setException(err);
return err;
}
RegExpImp *reimp = static_cast<RegExpImp*>(thisObj.imp());
RegExp *re = reimp->regExp();
String s;
UString str;
switch (id) {
case Exec: // 15.10.6.2
case Test:
{
s = args[0].toString(exec);
int length = s.value().size();
Value lastIndex = thisObj.get(exec,"lastIndex");
int i = lastIndex.isNull() ? 0 : lastIndex.toInt32(exec);
bool globalFlag = thisObj.get(exec,"global").toBoolean(exec);
if (!globalFlag)
i = 0;
if (i < 0 || i > length) {
thisObj.put(exec,"lastIndex", Number(0), DontDelete | DontEnum);
if (id == Test)
return Boolean(false);
else
return Null();
}
RegExpObjectImp* regExpObj = static_cast<RegExpObjectImp*>(exec->lexicalInterpreter()->builtinRegExp().imp());
int **ovector = regExpObj->registerRegexp( re, s.value() );
str = re->match(s.value(), i, 0L, ovector);
regExpObj->setSubPatterns(re->subPatterns());
if (id == Test)
return Boolean(!str.isNull());
if (str.isNull()) // no match
{
if (globalFlag)
thisObj.put(exec,"lastIndex",Number(0), DontDelete | DontEnum);
return Null();
}
else // success
{
if (globalFlag)
thisObj.put(exec,"lastIndex",Number( (*ovector)[1] ), DontDelete | DontEnum);
return regExpObj->arrayOfMatches(exec,str);
}
}
break;
case ToString:
s = thisObj.get(exec,"source").toString(exec);
str = "/";
str += s.value();
str += "/";
if (thisObj.get(exec,"global").toBoolean(exec)) {
str += "g";
}
if (thisObj.get(exec,"ignoreCase").toBoolean(exec)) {
str += "i";
}
if (thisObj.get(exec,"multiline").toBoolean(exec)) {
str += "m";
}
return String(str);
}
return Undefined();
}
// ------------------------------ RegExpImp ------------------------------------
const ClassInfo RegExpImp::info = {"RegExp", 0, 0, 0};
RegExpImp::RegExpImp(RegExpPrototypeImp *regexpProto)
: ObjectImp(regexpProto), reg(0L)
{
}
RegExpImp::~RegExpImp()
{
delete reg;
}
// ------------------------------ RegExpObjectImp ------------------------------
RegExpObjectImp::RegExpObjectImp(ExecState *exec,
FunctionPrototypeImp *funcProto,
RegExpPrototypeImp *regProto)
: InternalFunctionImp(funcProto), lastOvector(0L), lastNrSubPatterns(0)
{
Value protect(this);
// ECMA 15.10.5.1 RegExp.prototype
putDirect(prototypePropertyName, regProto, DontEnum|DontDelete|ReadOnly);
// no. of arguments for constructor
putDirect(lengthPropertyName, NumberImp::two(), ReadOnly|DontDelete|DontEnum);
}
RegExpObjectImp::~RegExpObjectImp()
{
delete [] lastOvector;
}
int **RegExpObjectImp::registerRegexp( const RegExp* re, const UString& s )
{
lastString = s;
delete [] lastOvector;
lastOvector = 0;
lastNrSubPatterns = re->subPatterns();
return &lastOvector;
}
Object RegExpObjectImp::arrayOfMatches(ExecState *exec, const UString &result) const
{
List list;
// The returned array contains 'result' as first item, followed by the list of matches
list.append(String(result));
if ( lastOvector )
for ( uint i = 1 ; i < lastNrSubPatterns + 1 ; ++i )
{
int start = lastOvector[2*i];
if (start == -1)
list.append(UndefinedImp::staticUndefined);
else {
UString substring = lastString.substr( start, lastOvector[2*i+1] - start );
list.append(String(substring));
}
}
Object arr = exec->lexicalInterpreter()->builtinArray().construct(exec, list);
arr.put(exec, "index", Number(lastOvector[0]));
arr.put(exec, "input", String(lastString));
return arr;
}
Value RegExpObjectImp::get(ExecState *exec, const Identifier &p) const
{
UString s = p.ustring();
if (s[0] == '$' && lastOvector)
{
bool ok;
unsigned long i = s.substr(1).toULong(&ok);
if (ok)
{
if (i < lastNrSubPatterns + 1)
{
UString substring = lastString.substr( lastOvector[2*i], lastOvector[2*i+1] - lastOvector[2*i] );
return String(substring);
}
return String("");
}
}
return InternalFunctionImp::get(exec, p);
}
bool RegExpObjectImp::implementsConstruct() const
{
return true;
}
// ECMA 15.10.4
Object RegExpObjectImp::construct(ExecState *exec, const List &args)
{
Object o = Object::dynamicCast(args[0]);
if (!o.isNull() && o.inherits(&RegExpImp::info)) {
if (args[1].type() != UndefinedType) {
Object err = Error::create(exec,TypeError);
exec->setException(err);
return err;
}
return o;
}
UString p = args[0].type() == UndefinedType ? UString("") : args[0].toString(exec);
UString flags = args[1].type() == UndefinedType ? UString("") : args[1].toString(exec);
RegExpPrototypeImp *proto = static_cast<RegExpPrototypeImp*>(exec->lexicalInterpreter()->builtinRegExpPrototype().imp());
RegExpImp *dat = new RegExpImp(proto);
Object obj(dat); // protect from GC
bool global = (flags.find("g") >= 0);
bool ignoreCase = (flags.find("i") >= 0);
bool multiline = (flags.find("m") >= 0);
// TODO: throw a syntax error on invalid flags
dat->putDirect("global", global ? BooleanImp::staticTrue : BooleanImp::staticFalse, DontDelete | ReadOnly | DontEnum);
dat->putDirect("ignoreCase", ignoreCase ? BooleanImp::staticTrue : BooleanImp::staticFalse, DontDelete | ReadOnly | DontEnum);
dat->putDirect("multiline", multiline ? BooleanImp::staticTrue : BooleanImp::staticFalse, DontDelete | ReadOnly | DontEnum);
dat->putDirect("source", new StringImp(p), DontDelete | ReadOnly | DontEnum);
dat->putDirect("lastIndex", NumberImp::zero(), DontDelete | DontEnum);
int reflags = RegExp::None;
if (global)
reflags |= RegExp::Global;
if (ignoreCase)
reflags |= RegExp::IgnoreCase;
if (multiline)
reflags |= RegExp::Multiline;
dat->setRegExp(new RegExp(p, reflags));
return obj;
}
bool RegExpObjectImp::implementsCall() const
{
return true;
}
// ECMA 15.10.3
Value RegExpObjectImp::call(ExecState *exec, Object &/*thisObj*/,
const List &args)
{
// TODO: handle RegExp argument case (15.10.3.1)
return construct(exec, args);
}
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