1 /*

     2  * Copyright (C) 2009 Apple Inc. All rights reserved.

     3  *

     4  * Redistribution and use in source and binary forms, with or without

     5  * modification, are permitted provided that the following conditions

     6  * are met:

     7  * 1. Redistributions of source code must retain the above copyright

     8  *    notice, this list of conditions and the following disclaimer.

     9  * 2. Redistributions in binary form must reproduce the above copyright

    10  *    notice, this list of conditions and the following disclaimer in the

    11  *    documentation and/or other materials provided with the distribution.

    12  *

    13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

    14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

    17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

    21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

    24  */

    25 

    26 #include "config.h"

    27 

    28 #if ENABLE(3D_CANVAS)

    29 

    30 #include "JSArrayBuffer.h"

    31 

    32 #include "ArrayBuffer.h"

    33 #include "ExceptionCode.h"

    34 #include <runtime/Error.h>

    35 

    36 namespace WebCore {

    37 

    38 using namespace JSC;

    39 

    40 EncodedJSValue JSC_HOST_CALL JSArrayBufferConstructor::constructJSArrayBuffer(ExecState* exec)

    41 {

    42     JSArrayBufferConstructor* jsConstructor = static_cast<JSArrayBufferConstructor*>(exec->callee());

    43 

    44     int length = 0;

    45     if (exec->argumentCount() > 0)

    46         length = exec->argument(0).toInt32(exec); // NaN/+inf/-inf returns 0, this is intended by WebIDL

    47     RefPtr<ArrayBuffer> buffer;

    48     if (length >= 0)

    49         buffer = ArrayBuffer::create(static_cast<unsigned>(length), 1);

    50     if (!buffer.get())

    51         return throwVMError(exec, createRangeError(exec, "ArrayBuffer size is not a small enough positive integer."));

    52     return JSValue::encode(asObject(toJS(exec, jsConstructor->globalObject(), buffer.get())));

    53 }

    54 

    55 } // namespace WebCore

    56 

    57 #endif // ENABLE(3D_CANVAS)