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/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include "config.h"
#include "FunctionConstructor.h"
#include "FunctionPrototype.h"
#include "JSFunction.h"
#include "JSGlobalObject.h"
#include "JSString.h"
#include "Parser.h"
#include "Debugger.h"
#include "Lexer.h"
#include "Nodes.h"
namespace JSC {
ASSERT_CLASS_FITS_IN_CELL(FunctionConstructor);
FunctionConstructor::FunctionConstructor(ExecState* exec, PassRefPtr<Structure> structure, FunctionPrototype* functionPrototype)
: InternalFunction(&exec->globalData(), structure, Identifier(exec, functionPrototype->classInfo()->className))
{
putDirectWithoutTransition(exec->propertyNames().prototype, functionPrototype, DontEnum | DontDelete | ReadOnly);
// Number of arguments for constructor
putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontDelete | DontEnum);
}
static JSObject* constructWithFunctionConstructor(ExecState* exec, JSObject*, const ArgList& args)
{
return constructFunction(exec, args);
}
ConstructType FunctionConstructor::getConstructData(ConstructData& constructData)
{
constructData.native.function = constructWithFunctionConstructor;
return ConstructTypeHost;
}
static JSValue JSC_HOST_CALL callFunctionConstructor(ExecState* exec, JSObject*, JSValue, const ArgList& args)
{
return constructFunction(exec, args);
}
// ECMA 15.3.1 The Function Constructor Called as a Function
CallType FunctionConstructor::getCallData(CallData& callData)
{
callData.native.function = callFunctionConstructor;
return CallTypeHost;
}
FunctionBodyNode* extractFunctionBody(ProgramNode* program)
{
if (!program)
return 0;
StatementVector& children = program->children();
if (children.size() != 1)
return 0;
StatementNode* exprStatement = children[0];
ASSERT(exprStatement);
ASSERT(exprStatement->isExprStatement());
if (!exprStatement || !exprStatement->isExprStatement())
return 0;
ExpressionNode* funcExpr = static_cast<ExprStatementNode*>(exprStatement)->expr();
ASSERT(funcExpr);
ASSERT(funcExpr->isFuncExprNode());
if (!funcExpr || !funcExpr->isFuncExprNode())
return 0;
FunctionBodyNode* body = static_cast<FuncExprNode*>(funcExpr)->body();
ASSERT(body);
return body;
}
// ECMA 15.3.2 The Function Constructor
JSObject* constructFunction(ExecState* exec, const ArgList& args, const Identifier& functionName, const UString& sourceURL, int lineNumber)
{
// Functions need to have a space following the opening { due to for web compatibility
// see https://bugs.webkit.org/show_bug.cgi?id=24350
// We also need \n before the closing } to handle // comments at the end of the last line
UString program;
if (args.isEmpty())
program = "(function() { \n})";
else if (args.size() == 1)
program = "(function() { " + args.at(0).toString(exec) + "\n})";
else {
program = "(function(" + args.at(0).toString(exec);
for (size_t i = 1; i < args.size() - 1; i++)
program += "," + args.at(i).toString(exec);
program += ") { " + args.at(args.size() - 1).toString(exec) + "\n})";
}
int errLine;
UString errMsg;
SourceCode source = makeSource(program, sourceURL, lineNumber);
RefPtr<ProgramNode> programNode = exec->globalData().parser->parse<ProgramNode>(exec, exec->dynamicGlobalObject()->debugger(), source, &errLine, &errMsg);
FunctionBodyNode* body = extractFunctionBody(programNode.get());
if (!body)
return throwError(exec, SyntaxError, errMsg, errLine, source.provider()->asID(), source.provider()->url());
JSGlobalObject* globalObject = exec->lexicalGlobalObject();
ScopeChain scopeChain(globalObject, globalObject->globalData(), exec->globalThisValue());
return new (exec) JSFunction(exec, functionName, body, scopeChain.node());
}
// ECMA 15.3.2 The Function Constructor
JSObject* constructFunction(ExecState* exec, const ArgList& args)
{
return constructFunction(exec, args, Identifier(exec, "anonymous"), UString(), 1);
}
} // namespace JSC
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